typical applicate case of apf

8/13/2019 Typical Applicate Case of APF

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Typical solution of

various electrical energy quality improvements



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Contents

1` Description .............................. ........................... 3

2 、Typical Case ................................ ................. 4~35

1、Textile Industr y .............................................................................. 4~5

2、Water Factory .......................................................................................... 6~7

3、Tobacco Industry Case No. 1.............................................................. 7~8

4、Tobacco Industry Case No. 2............................................................ 9~10

5、Communicate Server Room Case No.1 .................................... 11~12

6、Communicate Server Room No.2 ............................................... 13~14

7、Electrical Bus of Beijing Olympic Games ............................................ 14

8、Sewage treatment plant ............................................................................. 16

9、Steel Tube Plant ............................................................................................ 17

10、Glass Factory .............................................................................................. 18

11、Oilfield ............................................................................................................. 20

12、High Harmonic Compsenation: Electronic Company .............. 21

13、High Harmonic Compsenation: Iron Ore Factory ..................... 23

14、Silicon industry .................................................................................. 26~28

15、Hybrid Harmonic Control：Pharmaceutical industry ........ 28~30

16、Metro & Railway ............................................................................ 31~35



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1 Descr ip t ion

Generally, the definition of electrical energy quality is the difference of voltage,

current and frequency, which causes the user's equipment breakdown or cannot the

normal work. This definition is simple and clear, overview of the reason of power

quality problems and consequences.

Along with based on computer system's control device and electronic installation's

widespread application, in the electrical power system uses electricity the load

structure to have the change, namely misalignments, the shocking load and so on

frequency conversion installment, arc furnace steel-making, electrification

railroad create to the electrical energy quality pollution and the destruction, but

the electrical energy takes the commodity, the people to the electrical energy

quality will propose that a higher request, the electrical energy quality has become

the entire society together matter of concern gradually, the related electricalenergy quality's question already became the electrician domain the leading edge

topic. The electrical energy from the production to the consumption is a whole, sends

service is in throughout the dynamical equilibrium, therefore, sends, loses, for,

can have the influence with each link to the electrical energy quality. Relatively

speaking, the voltage deviation and the frequency departure mainly decided that in

electrical network's structure, the system idle work canceller and adjust the

pressure, the frequency modulation method as well as the electrical network dispatch

rationality. But the electric power pollution (including electric power overtone,

voltage hunting and flickering, and three-phase voltage not balanced) mainly by each

kind of misalignment load, the shocking load and is asymmetrical shoulders causes.

In the tradition, to the electrical energy quality attention's target is the

frequency departure and the voltage deviation, but is insufficient to the electric

power pollution's value, causes these targets to worsen unceasingly, threaten

seriously electrical power system's security economy movement. Recent years, had

the accident which the multi-electromotive force pollution causes, brings to the

attention gradually. But, should see the electric power pollution is similar in many

aspects to the environmental pollution, needs the entire society joint effort,

obtains from the Treatment source of pollution, can make the good progress, Our

company is engaged in the electrical energy quality problem improvement, at presentour products are mainly for harmonic filter and compensation, we are most in the

profession of Professions and so on tobacco, petroleum, electric power, spinning

and weaving, metallurgy, the following is several kind of typical cases.



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2. Typical Case

1 Harmonic Compensations for Textile Industry

Situation Description

The textile mill main load are the large capacity UPS and the textile machinery. The UPS provides

high quality energy with high precision AVR and small waveform distortion, but because the UPS is

the non-linear load, in the UPS rectifier unit produces the massive harmonic current; it causes the

electric current distortion factor to be very high. It’s not only causes the harmonic pollution to the

electrical network, but also has affected the normal working of the reactive power cabinet; so it must

make harmonic filter.

Harmonic Compensation Plan

As per the testing result, we found the reactive power cabinet can ’t work normally. The most reason is

the harmonic from the UPS is enlarged by the capacitor of the reactive power cabinet and the machineis trip due to over current. We provide our APF to make harmonic filter

Treatment effect

Please check the Comparison Chart as below:

(Note: take the 5th harmonic as the example)

Current spectrum:

(a) before APF (b) after APF

Current waveform:

(c) before APF (d) after APF



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We can see from the figure above, before the compensation, the total harmonic content is 28.9%, and after

the compensation, the total harmonic content drops to 6.4%; Electrical network's electric current distortion

factor has great scope reduction very much, before the current waveform compensates, is closer the ideal

sine wave, simultaneously, the active electric power filter's investment also enables the idle work cabinet

to put the operation normally.

The Installation Position of APF

The Photos of APF for this project



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2 Harmonic Compensations for Water Factory


At the Water Factory, the large power frequency converters drive the power of feed pump. Because inside of the

frequency converter must carry on the high efficiency diode rectification and the high efficiency thyristor to invert, it

is produces higher harmonic current in the input output circuit; it disturb the disturbance power supply system, the

load and other neighbor electrical equipment, interferes with the metering device work not to be normal


After the scene test analysis, use one unit 100A active electric power filter can enable harmonic filter,

and the metering device can the normal work

Treatment effect

Current spectrum:

(a)Before APF (b)After APF

Current Wave Form:

(c)Before APF (d)After APF

After install APF, the harmonic is under effective suppression, the current waveform tends the sine wave, and the

metering device work is stable.



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3 Harmonic Compensations for Tobacco industry Case No.: 1


At certain leaf tobacco processing factory, the harmonic source most come from two distribution room

and the load is “Leaf/Thresher Machine”. This work line is filters the leaf tobacco in impurity, does

not obtain including the impurity leaf tobacco, this process is and so on realizes through the frequencyconverter as well as the electrical machinery, the frequency converter is a very big harmonic source,

therefore brings the very serious harmonic pollution and the harmonic interference to the system, must

make the harmonic Treatment.


After test data analysis, we provide seven units active electric power filters to use separately in two

transformer vaults: There were two units are use for the first transformer vault, others five units are

use for the second transformer vault; each filter correspond one leaf/thresher machine, such

disposition may achieve suppresses the overtone effectively, improves the electrical network electrical

energy quality the goal.



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Treatment effect

Current spectrum:

(a) Before APF (b) After APF

Current Wave Form:

(c) Before APF (d) After APF

The current situation before and after harmonic filter




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4 Harmonic Compensations for Tobacco industry Case No.: 2


In the present cigarette factory production equipment, has used the large quantity of frequency converter;

but the frequency converter is the typical non-linear power source, therefore causes its power supplysystem current harmonics content to be very high, has increased supply line's harmonic loss seriously and

harms the other current collector's safe operation. Cigarette factory various departments to conserve

energy fall consume and govern the harmonic pollution the understanding to be clear day by day, therefore

becomes the cigarette factory to power supply system's harmonic filter is a key project.


According to the above situation, we made data analysis and confirm that the cigarette factory harmonic

mainly by the frequency converter. And we use our company independent research and development the

parallel active electric power filter (SPA3-XXX/0.4) to carry on with the centralism Treatment plan.

Treatment effect

Current spectrum:


Current Wave Form:

(c)Before APF (d)After APF

The current situation before and after harmonic filter From the above data we may know, before the active electric power filter invest, the phase current of

frequency converter from compensation 660A drops to 626A, before comparing the filter, dropped 5%; the



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5th harmonic current from compensation 111A drops after the compensation 13A, dropped 88% compared

with before, thus it can be seen, the active electric power filter's investment achieved good has disappeared

the harmony energy conservation effect.

The photo of APF for this project



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5 Three-phase Four Wires APF:

Harmonic Compensations for Communication Room Case No.: 1


Along with the correspondence enterprise's rapid development, and the corresponds electrical powersystem's scale also day by day to expand, because the power equipment increases unceasingly, but too

concentrates. Some motion subsidiary company used has wrapped UPS and the switching power

supply system, UPS and the switching power supply is the typical three-phase non-linear load, these

non-linear load equipment in the use process, will produce the harmonics current, thus caused the

voltage, the electric current wave mode to have the distortion, serious influence engine room power

supply security.


In order to eliminate the power supply hidden danger, enhances the synthesis building exchange

power supply the security and the reliability, according to site survey situation, in view of the fact that

produces harmonic order's type are many, must use the active electric power filter (active filter to be

possible to filter multi-number of times harmonic current). We made the appraisal to its filter

performance, the effect have been obvious.

Treatment effect

Current spectrum:



We may see from the chart, before the compensation, total harmonic content 58.2%, after the

compensation, the total harmonic content drops to 5.4%; The 5th harmonic from compensate first

50.7% to drop to compensate latter 5.4%; After obviously the filter invest, the system overtone was

under very good suppression, the promotion power supply system's power supply reliability,

eliminated the system overtone to the communications system influence hidden danger, has received

the good results.



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Filter position schematic drawing :

The Schematic Drawing Install Position of APF


UPSbranch

SwitchPowerSupply

（6Floor）

GEUPS

＊1

G

o.:3SwitchPowerSupply

＊2

GEUPS

＊2

2

IMVUPS

＊2

PowerWare

UPS-1

IMVUPS

＊1

PowerWare

UPS-2

3 4 5

7

6

8 9 10 11 12 13 14

1


＊1

o.2:SwitchPow

erSupply

＊2

o.:2SwitchPow

erSupply

＊1


＊2

o.:1SwitchPow

erSupply

＊1



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6 Three-phase Four Wires APF:

Harmonic Compensations for Communication Room Case No.: 2


In the correspondence engine room, UPS has become in the engine room the indispensable equipment,UPS may provide the constant voltage precision to the load high, the steady frequency, the profile low

distortion high grade electrical energy, and when cuts with the static bypass may make the power

supply to be not interrupted, but, because UPS is the misalignment load, it will produce the massive

current harmonics, will cause the overtone pollution to the electrical network at the same time, also

will affect in the engine room other sensitive equipment, will cause the very big disturbance to the

communications system even to harm, therefore all correspondence engine room must face the

overtone Treatment the question.

Treatment plan

Discovered according to the scene operating mode and the measurement result that the overtone

mainly by UPS and some misalignment direct-current power supply production, according to the

mature consummation's whole set overtone Treatment solution, uses Our company independent

development production the parallel active electric power filter, the automatic tracking Treatment load

produces harmonic current, guarantee overall system safe reliability service.

Treatment effect

Current spectrum: (a)Before APF (b)After APF

Current Wave Form: (c)Before APF (d)After APF



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We can see from the chart avove, the compensation effect is very obvious, power factor compensation to 0.99; Before the

total harmonic content from the compensation 23.4% drops after the compensation 6.2%, the electric current profile have

the good improvement, very close sine.

7 . Harmonic Compensation for the electrical equipment of Beijing Olympic Games tram passenger

Branch


The Tram passenger Branch of Beijing Public Transport Holdings (Group) Co., Ltd. is located at

Chaoyang District North Star road, the newly built Olympic Games electric automobile battery

charging station, new clothing power equipment capacity 2903kW (battery charger, elevator, water

pump and so on), electric light equipment 100kW (air conditioning, illumination and so on), always

uses capacity 3003kVA. The main harmonic equipment is a battery charger, each 9kW, altogether 210,

two group equal distributions. The battery charger is becomes the alternating current the direct current,

its harmonic characteristic is 6 pulse waves, because has the rectification part (diode rectification), the

battery charger will pour into the harmonic current to the electrical network, brings the serious

overtone pollution and the safe hidden danger to the system.

Treatment plan

Because all equipment have not arrived, can only defer to the evaluation value to carry on filter's

choice, according to calculates under about each transformer's harmonic content 330A, therefore

chooses two 400A active electric power filter.

Treatment effect

Current spectrum: (a)Before APF (b)After APF




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The photos of APF for this project



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8 Harmonic Compensation for Sewage treatment plant

Project Situation Description

Some Sewage treatment plant transformer substation load is mainly composed of 21 frequency

converters, drives the corresponding electric motor by the frequency converter, the power distributionsituation are 7 units 37kW, 7 units 2.2kW and 7 units 1.5kW. And every three are a group, the

altogether 7 groups, each group including 1 unit 37kW, 1 unit 2.2kW and 1 unit 1.5kW, there were

maximum three group are working at the same time. Because all of them are the frequency converter

load completely and the frequency converter is a very big harmonic source, therefore brings the very

serious harmonic pollution and the harmonic interference to the system, causes the system cant not

normal work, regular burns out the electrical element, to solve the problem, must make the harmonic

filter.

Treatment plan

The information which provides according to the user, the load invests three groups also to move mostmuch, then the biggest movement's power for (37kW+2.2kW+1.5 kW) ×3=122.1 kW, the harmonic

content approximately is 36 kW, therefore we choose 50 kW the overtone Treatment installments.

Treatment effect

Current spectrum: (a) Before APF (b) After APF

Current Wave Form: (c) Before APF (d) After APF




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We can see from the above data, around the movement active electric power filter, the electrical network

electric current change was very obvious, achieves eliminated the current harmonics, the improvement

supply voltage goal.

9 Harmonic Filter for the Pipe Mill Factory

Project Situation

The pipe mill Production workshop equipment major technique parameter is as follows:

1 The power transformer is the S9 series. The capacity respectively is 1250kVA and 2000kVA, the primary voltage is

10kV, the secondary voltage is 0.4kV

2、The transformer wiring way is Y/Y0.

3、The 1250kVA transformer load is two 600kW intermediate frequency heating power source, the main

wiring uses the thyristor three-phase bridge-type rectification; Fast thyristor single-phase bridge

inversion; the stored energy part is a reactor; the output is 2.5 kHz.4、The 2000kVA transformer load for alternating and direct transmission electrical machinery, direct

current machine 6 units 132kW four, 2 units 75kW, the aggregate capacity is 678kW; the junction is

perpendicular to frequency converter 28, the aggregate capacity approximately is 350kW; Other for

ordinary alternating current machine.

5、Intermediate frequency power source for intermittent type working, frequency approximately 30S.

6、The 2000kVA transformer according to needs to be possible also to work. Because the intermediate

frequency power source, the direct-current conveyor and the massive frequency changers are the main

overtone sources, causes the system serious distortion, thus causes the idle work compensation electric

capacity to burn out, the system failure rate to increase frequently, therefore proposes the idle work

compensation and the harmonic Treatment master-plan.

Treatment plan

According to the scene situation, We proposed the active Canadian passive mixed type

Treatment plan, this plan uses our independent development the model is the SPF-300/0.4

passive electric power filter and the SPA3-150/0.4 active electric power filter carries

on the idle work compensation and the harmonic Treatment.

Treatment effect

The power before and after compensation



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According to above compensation's around graph contrast, the power factor before the

compensation is about 0.6, after use the passive electric power filter, the power factor

enhances to 0.93 above, meets the customer requirements, the harmonic content also drops

to 7% about; After investing the active electric power filter, the harmonic content drops

to 3.5%~5.6%.

1 Harmonic Filter for the Glass Factory

Project Situation

At present, the glass 10kV power distribution station mainly has a transformer. Its

capacity is 1000kVA, 10kV/0.4kV; the main load is the common DC equipment, and the high

efficiency frequency converter is working only when the forced-air cooling for glass.

As soon as the Glass outputs from the toughening furnace, the cooling fan starts to

work immediately; this kind of work process has circulated, in the air blower work

process, electrical network's electric current distortion is high.

Treatment plan

According to the scene test data overall evaluation, selects a manner number is the SPA3-100/0.4 active electric

power filter, carries on the compensation to electrical network's harmonic, then achieves the effective overtone



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Treatment the goal

Treatment effect



The current before and after harmonic filter

May see from the chart, before the filter working, the electrical network harmonic current

is very big, the total harmonic current distortion factor reaches as high as 75.8% most

greatly, the electrical network current waveform also serious distortion, but after

contrasting the filter invest, may see, the total harmonic current distortion factor was

smallest has dropped to 24.4%, the electrical network current waveform also compared with

before a closer sine wave, the electrical network electrical energy quality had the

effective improvement



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11 Harmonic Filter for the Oil Factory:

Project Situation

The oil field main load is the belt velocity modulation equipment's sludge pump and

the drilling equipment, because the velocity modulation equipment is the non-linear

load, therefore definitely will produce the serious voltage and electric current

distortion, will thus cause the logging meter record to make a mistake frequently or

the data is inaccurate, for this reason, Our company for Daqing Oil Field's 50DB, the

70DB power supply system, North Shanxi Changqing oil field's 50DB, the 70DB power supply

system, the Xinjiang Karamay Oil Field's 90DB power supply system has carried on the

field data test, will create the serious electrical energy quality problem after the

data analysis discovery the reason is the sludge pump and the drilling equipment in

the work process, will produce the harmonic voltage has interfered with the logging

meter's normal work, must therefore carry on the harmonic Treatment.

Treatment plan

Through the scene electrical energy quality diagnostics, Our company proposed adopts the independent research

and development production the driving-type voltage quality controller (AVQR) to solve logging meter

questions and so on power line voltage overtone, fluctuation, flickering, quick break, causes the logging meter

movement to be reliable, the record is accurate.

Effect analysis

The voltage before and after with harmonic filter



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12 High Harmonic Control for A Electronics Co., Ltd. Qinhuangdao

Project Situation

There were 5 set of rectification transformers in their electrical power distribution

system, they are mainly provide power supply for the 10 sets of Intermediate frequency

electric furnace melting. This kind of equipment selects 12 pulse wave thyristor

rectification method, has the serious non-sinusoidal distortion and the massive higher

harmonics in the production process, creates the significant disturbance to own

electrical power distribution system and the public electrical network. At the same

time, as a result of this non-linear load is inductance, causes own electrical power

distribution system's power factor to worsen, the 10KV coil in leans 11st and 13th

harmonic current surpasses the national standards request, then has affected the

electrical power distribution system and the public electrical network's electrical

energy quality greatly. If does not carry on the harmonic filter, not only causes theharm to this company own electrical power distribution system, but also will endanger

the public electrical network security.

Treatment plan

the 10KV high tension system divides 4 sections and 5 section of bus bars, each section

of bus bar's active electric power filter capacity is 450A, the use model is

SPA3-150A/0.4 filter 3 parallel, delivers to the 10kV side and the load overtone

superimposition through the 0.4kV/10kV overtone transformer the overtone, achieves with

the electrical network overtone counter-balance function.

Diagram of installation

10kV5段进线 10kV4段进线

10kV母联

1600kVA

3810kVA

中频炉中频炉

3810kVA

中频炉中频炉

3810kVA

中频炉中频炉

3810kVA

中频炉中频炉

3810kVA

中频炉中频炉

2 50 0k VA 2 50 0k VA

2 500 kV A 1 600 kV A

1#

熔炼电炉

2#

熔炼电炉

3#

熔炼电炉

4#

熔炼电炉

5#

熔炼电炉

有源

电力滤波器

有源

电力滤波器

Power distribution subsystem chart after APF



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Effect analysis

The 11st harmonic before and after APF

The 13th harmonic before and after APF



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Current spectrum before and after APF

Conclusion: After the 10KV bus bar 4 sections and 5 sections use two set of active electric

power filter installment carries on the Treatment, the system overtone was under very good

suppression, the 11st and 13th harmonic limits completely in the national standards scope,

the promotion power supply system's power supply reliability, eliminated the system

overtone to the electrical network system influence hidden danger, has received the goodresults, achieves the improvement electrical network electrical energy quality the goal.

13 High Harmonic Control for An iron mine in Liaoning

Project Situation

The mine pit elevator is in the coal mine production process important equipment, now the

frequency converter obtains the widespread application on the mine pit elevator, after

using the frequency converter, has realized the soft start and the smooth velocity

modulation, enhanced has input power source's power factor, had the very good electricity

saving effect, on the other hand, because the frequency converter was the non-linear load,

therefore produced the large amount of harmonic in the work process, thus caused the

pollution to the electrical network, even affected the other equipment's normal operation.

。

Treatment plan

The field application three manner numbers are the SPA3-200A/0.4 active electric power

filter select the parallel method to pour into through the boosting transformer the

harmonic current 10KV the electrical network, carries on the Treatment to the electrical

network current harmonics.

Diagram of installation

矿井提升机

APF1~3

800/5 800/5

6.3kV母线

0.4/6.3kV

CT1

CT3

CT2



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Diagram of APF installation

High harmonic control renderings




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Effect analysis

1. Before and after harmonic compensation for the 11st harmonic:

(a) Test data before compensation (b) Test data after compensation

The harmonic current wave form before and after compensation (The scope within range is before compensation)

2 Before and after harmonic compensation for the 13th

harmonic

(a)Test data before compensation (b) Test data after compensation



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The harmonic current wave form before and after compensation (The scope within range is before compensation)

14. Silicon industry harmonic control

Project Situation

The silicon is a high tech resource with potential extremely; urgent need of development

and utilization, more and more is being paid attention and takes seriously. Its technique

of production is divided fusing to heat up and to direct current the heating, the fusing

heating uses the intermediate frequency heating furnace much, pulls the type unitcrystal to use the direct-current heating furnace straight. But no matter is the

intermediate frequency stove or directs current the stove heating, selects the

semiconductor controllable rectification method, in their itself work process will

produce the very massive current harmonics, will cause the harmonic pollution to the

electrical network, these harmonic will cause the precision instrument precision losing

accuracy even wrong operation, destroyed system's idle work compensation, creates

increase which and damage compensation capacitor the system power supply will lose and

so on, will have the very tremendous influence regarding the silicon complex growth

process as well as later period's precision sizing flow, therefore electrical network's

quality was deciding indirectly the silicon end product material's quality, the nearly

all silicon manufacture production line will face the overtone question.

Treatment plan

According to the scene transformer vault operating mode and the test result, were mainly

the massive intermediate frequency stove as well as the partial high efficiency

switching power supply have produced the massive harmonic current in the work process,

then brought the voltage the distortion, but the massive harmonic current caused the

current harmonics after the idle work canceller's enlargement to be more serious, thevoltage distortion factor reached as high as 11.6%. The overtone creates the idle work

canceller's electric capacity damage frequently, as well as Production workshop



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individual equipment misoperation even component damage. We has made complete set of

harmonic compensation solution for this enterprise, uses our company independent

research and development the parallel active electric power filter (APF), carries on

the centralism Treatment in the transformer going beyond a line side. The filter may

the automatic tracking Treatment load produce harmonic current, and effective

filtration overtone, thus guarantees the overall system safe reliability service.

System Treatment schematic drawing

1#

总

盘2#

电容

柜

APF

P4

出

线

柜

P5

出

线

柜

P6

出

线

柜

P9

出

线

柜

P10

出

线

柜

P11

出

线

柜

P12

出

线

柜

1#

电

容

柜

3#

电

容

柜

4#

电

容

柜

2#

总

盘P8

出

线

柜

P7

母

联

柜

10kV母线

1# 器

10kV/0.4kV

2# 器

10kV/0.4kV

0.4kV母线测试点

Installation Diagram of APF

Treatment effect

Before APF： After APF：

Voltage

Wave Form



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Voltage

Current

spectrum

Current

Wave Form

Current

spectrum

Before and after the effect of contrast harmonic control

Conclusion: Is obvious by the figure above, after the active electric power filter,

the electrical network quality has the distinct improvement, the harmonic voltage,

the harmonic current reduces large scale, has protected on the idle work compensation

system electric capacity as well as production line's precision equipment's normal

operation effectively.

15、 Mixed Compensation Case for Pharmaceutical Industry

Project Situation

Some pharmaceutical company main harmonic source Production workshop has the

Fermentation plant, this workshop has 4 transformers (2000kVA, 10/0.4kV), every two

parallel are a group, is divided two groups, and between these two groups is mutual

non-interference, independent movement. And a group (east) under has (electrical

machinery capacity which 6 frequency converters bring is 280KW), other group (west)

7 frequency converters (bring electrical machinery capacity is 200KW), in each group

of 0.4kV bus bar two set of 600kvar electric capacity canceller; Withdraws the concise

workshop to have two transformers (1250kVA,10/0.4kV), the movement way is the

independent movement, the big Power room is also two transformers (1250kVA,10/0.4kV),also for independent movement way, other loads for cage type electrical machinery and



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frequency changer. The frequency changer will produce the big non-sinusoidal distortion

electric current in the work process; will create the significant disturbance to the

electrical network.

Treatment plan

According to the scene situation, to purify the electrical network, enhances the system

power factor, the harmonic cancellation harm, we adopt passive Canada active to merge

the type mixed type Treatment plan, needs the equipment grand total:Fermentation workshop

East side fermentation ：1*2000KW

…………….The 5th harmonious -like passive filter SPF-600/0.4 altogether 1 set

……………Active electric power filter SPA3-150/0.4 altogether 2

West side fermentation：2*2000KW

……………The 5

th

harmonious -like passive filter SPF-600/0.4 altogether 2 setActive electric power filter SPA3-150/0.4 altogether 2

Withdraws the workshop 1*1250KW

The 5th harmonious -like passive filter SPF-400/0.4 altogether 1 set

Active electric power filter SPA3-75/0.4 altogether 1 set

The penicillin withdraws the workshop 2*1600KW

……………The 5th harmonious -like passive filter SPF-600/0.4 altogether 2 sets

……………Active electric power filter SPA3-150/0.4 altogether 2 sets

Treatment effect

(a)Current Wave Form before APF (b)Current Wave Form after APF



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(c)Power Factor before APF (d)Power Factor after APF

(e) Current spectrum Before APF (f) Current spectrum After APF

The current situation before and after APF

Conclusion: Through after debugging APF and the SPF actual filter effect test, may believe

firmly, APF and the SPF filter efficiency is bigger than 80%, the active electric power

filter and the passive electric power filter's active status conforms to or surpasses the

nominal performance index.

The photo of APF and SPF for this project



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16 The electrical energy quality problem solution for metro

Project Situation

In order to respond the summons which the national energy conservation falls consumes,

certain subway Group decided that makes the energy conservation transformation in the

orbital transportation use frequency converter, simultaneously carries on the harmonic

Treatment to the frequency changer. Through period of time investigation and study,

to carry on this energy conservation innovation project well, the group decided that

carries on the experiment site in the orbital transportation 4 lines. And the frequency

converter selects the Schneider Limited company's product, the active electric power

filter select our product.

Treatment plan

According to the scene situation, because this transformer vault has two group coil in power supplies, therefore the

filter install in the public bus bar, the active electric power filter install the position like chart to show.

55kW变频器

排热风机

15kW变频器

回排风机

37kW变频器

组合式空调

其它负荷

0.4kV母线

APF

测试点

The schematic diagram of APF installation



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Treatment effect

Before the compensation After the compensation

Wave form

and

single-phase

power



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Line

voltage

The 5th

harmonic

current

The 7th

harmonic

current



, total page 35

The 11st

harmonics

current

The 13th

harmonics

current

The 17th

harmonics

current

The 19th

harmonics

current



The 23th

harmonics

current

APF run before and after comparison of the data

Conclusion: In the APF movement process, the electrical network side current waveform basic

is the sine, the power factor basically about 1, electric current THD about 8%, voltage

THD has reduces, the filter compensation efficiency surpasses 90%, the single compensation

rate reaches as high as 98%. Had proven the match abundant electricity's active electric

power filter may under the different operating mode the steady work, achieves the good

compensation effect.

typical applicate case of apf

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