pv box st technical specification_v01.pdf

PV Box ST – Technical Specification

PV Box ST Technical Specification_V01.doc Revision:

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1/24 The information is highly confidential and is the exclusive property of Schneider Electric copyright reserved. This document must not be used for any purpose other than that expressly permitted in writing by the owners and must not be disclosed or reproduced in any way without permission from the owners in writing. This document must be returned to the owners when the purpose has ceased.

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PV Box Sea Transportation Design

Technical Specification

00 01

Original

20/09/13 08/11/13

M. PAGE M. PAGE

B. FROIDUROT B. FROIDUROT

C.RIGONI C.RIGONI



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This document is the property of Schneider Electric. It cannot be used or communicated without its written agreement.

Document Information

Version /date Updated pages Modification

00 – 20/09/13 New Version

01 – 08/11/13 Mission Profiles and dimensions updates

Renaming of support kit for weather sensor option Weather sensor and cables not included in Support

kit option Bender relay appellation deleted in Configuration

Additional device Germany grounding option

Renaming: Monitoring cabinet integration

Deletion of fuse holder choice



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Summary

1. Introduction ...................................... ............................................................. 4

1.1. Purpose ............................................................................................................................................ 4

1.2. Advantages of Schneider Electric PV Box ST solution ..................................................................... 4

2. PV Box ST in a nutshell ........................... ..................................................... 6

2.1. Mechanical structure ........................................................................................................................ 6

2.2. Electrical structure ............................................................................................................................ 6

2.3. Environmental mission profile ........................................................................................................... 6

2.4. Reference standards ........................................................................................................................ 7

3. PV Box ST design .................................. ....................................................... 8

3.1. Data Sheet ....................................................................................................................................... 8

3.2. Operating mission profiles ................................................................................................................ 9

3.3. External connections to PV Box: .....................................................................................................10

3.4. Enclosure design .............................................................................................................................11

4. Main electrical equipment features ................ ........................................... 12

4.1. Inverter ............................................................................................................................................12

4.2. MV switchgear .................................................................................................................................14

4.3. MV / LV transformer ........................................................................................................................15

4.4. DC Box ............................................................................................................................................16

4.5. LV Box ............................................................................................................................................18

4.6. Auxiliary transformer .......................................................................................................................19

4.7. Monitoring cabinet integration (Optional) .........................................................................................19

5. Your PV Box ST configuration ...................... ............................................. 21

6. Project specific comments and exclusions .......... .................................... 23

7. Single Line Diagram ............................... .................................................... 24



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1. Introduction 1.1. Purpose

This document provides all main information in order to describe the standard PV Box ST features with all electrical equipments inside for the photovoltaic power plants. This PV Box ST has been optimized to meet all IEC standards constraints, the climatic conditions, the photovoltaic power & grid voltage requirements, the sea transportation constraints and the monitoring remote options. It is then compatible with most of the PV plant projects around the world. The solution described below can be adapted to several environmental and electrical conditions and consequently, shall be configured according to project location.

1.2. Advantages of Schneider Electric PV Box ST sol ution

1.2.1. Flexible

• Various packages of external equipment (filtering packs, ventilation system, heating system) to meet a wide

range of environmental conditions

• Various packages of internal equipment to meet any customer preoccupation: Lowest possible CAPEX or

lower OPEX, maximal energy production and long equipment lifespan

• Adaptable to most of the MV grid voltages and codes

• Full grid-interactive functions available with configurable inverters

• Numerous building codes and requirements already integrated in the design

1.2.2. Easy to install

• Compact and lightweight (to minimize civil work costs and unloading costs)

• Easy to transport by standard boat shipping or using standard-sized trucks

• Delivered pre-assembled, configured, and tested to reduce on-site labor and project duration

1.2.3. Easy to service

• Maintenance of every equipments shall be done inside regardless of weather conditions

• May host Schneider Electric Conext Control monitoring & control solution

• Conext Control allows remote fault detection, early failure notifications to alerting of maintenance team and

remote actions to minimize downtime

• All equipment replaceable through the doors

• Separate MV and LV rooms for safe maintenance

• Local Schneider Electric service available in 100+ countries



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1.2.4. Designed for reliability

• Tested and qualified in harsh environmental conditions

• Components designed for lifespan of 20+ years in tough conditions

1.2.5. Higher return on investment

• Optimized CAPEX: Feature level matching exactly customer requirements, reduced transportation and

installation costs, no on-site wiring or cabling

• Reduced OPEX: Qualified and reliable design minimizing the risk of failure and the cost of site interventions

• Power management in order to reduce auxiliaries’ consumption

• Maximum production: High efficiency components (inverters, transformers), minimization of downtime with

Conext Control, monitoring and management of auxiliary components.

• Increased lifespan: Components are kept in optimum ambient conditions whatever external conditions



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2. PV Box ST in a nutshell 2.1. Mechanical structure

The PV Box ST is made of 1 main parts ensuring the associated functions:

1. Metallic High Cube Container � Support the whole system. � Allow cables connecting and path. � Include an oil retention tank � Support equipments. � Withstand wind and snow constraints. � Insulation made with mineral wool used to insulate the walls and the roof of the PV Box

i. Waterproof ii. Thermal insulation

2.2. Electrical structure

There are 3 electrical compartments:

1. Low Voltage (LV) compartment IP54 rated, containing: � 2 inverters � 2 DC Box � 1 LV Box � 1 Monitoring box (optional) � 1 auxiliary transformer.

2. Medium Voltage (MV) compartment, IP 54 rated, containing:

� 1 Ring Main Unit

3. Transformer compartment, IP 23d rated, containing: � 1 Power Transformer

2.3. Environmental mission profile

Mission profiles are defined according to temperature, presence of dust, sand or salt (pollution level).

1. Low Pollution mission profile � Air inlets equipped with G4 folded filters. � LV room ventilated directly by the inverter fans � Transformer air cooling is obtained by natural circulation air flow � 2 temperature ranges (Temperate/Tropical, Continental)

2. Moderate Pollution mission profile

� 2 filtering boxes connected and sealed to the PV Box external LV room door side � filtering boxes contain several filtering layers (Inertial filter screen, filter for sand filtration, G4

folded filters, F9 folded filters) � LV room ventilation obtained with extra fans ensuring up to 11 200m3/h airflow inside the PV

Box � Transformer air cooling is obtained by natural circulation air flow � 2 temperature ranges (Temperate/Tropical/Desert, Continental)

3. High Pollution/High Temperature mission profile

� 1 air conditioning system � 1 temperature range (Desert hard)



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2.4. Reference standards

PV Box is designed according to IEC 62271-202 (High-voltage/low-voltage prefabricated substation) applicable requirements. PV Box components refer to following standards:

Reference standards

Substation

IEC 62271-202 High-voltage/low-voltage prefabricated substation

IEC 60529 Degrees of protection provided by enclosures (IP code)

IEC 60721 Classification of environmental conditions

Transformer IEC 60076-1 to 10 Power transformers

EN50464-1 Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2 500 kVA with highest voltage for equipment not exceeding 36 kV

MV Switchgear

IEC 60255-1 Measuring relays and protection equipment Part 1 : Common requirements

IEC 60265-1 High-voltage switches Part 1: Switches for rated voltages above 1 kV and less than 52 kV

IEC 62271-1 High-voltage switchgear and controlgear Part 1: Common specifications

IEC 62271-100 High-voltage switchgear and controlgear Part 100 : Alternating-current circuit breakers

IEC 62271-102 High-voltage switchgear and controlgear Part 102 : Alternating current disconnectors and earthing switches

IEC 62271-105 High-voltage switchgear and controlgear Part 105 : Alternating current switch-fuse combinations

IEC 62271-200 High-voltage switchgear and controlgear Part 200 : AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV

Inverter

EN 50178 Electronic equipment for use power installations

EN 61000-6-2 Electromagnetic compatibility (EMC) Part 6-2 Generic standards-Immunity for industrial environments

EN 61000-6-4 Electromagnetic compatibility (EMC) Part 6-4 Generic standards-Emission standard for industrial environments

DC box LV box Monitoring cabinet

IEC 61439-1 & 2 Low-voltage switchgear and controlgear assemblies



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3. PV Box ST design 3.1. Data Sheet

The choice of the inverter is directly linked to the PV Panel model, temperatures and requested Power factor. Consequently, the XC model will be chosen through a calculation during the project design phase.

Type of PV Box ST PV Box

ST 540kVA

PV Box ST

630kVA

PV Box ST

680kVA

PV Box ST

1080kVA

PV Box ST

1260kVA

PV Box ST

1360kVA Input ratings (DC) Suggested PV power 1×621kWp 1×725kWp 1×782kWp 2×621kWp 2×725kWp 2×782kWp

Nominal PV Box power at PF =1 1×540kW 1×630kW 1×680kW 2×540kW 2×630kW 2×680kW

Max DC voltage, open circuit 1 000 V

Maximum DC current 1×1280 A 2×1280 A

Max short circuit DC Current in STC conditions 1x1600 A 2x1600 A

Max short circuit DC current 1×2000 A 2×2000 A

Number of protected DC inputs 1×(6 or 10) 2×(6 or 10)

Output ratings (AC) Nominal AC power 540 kVA 630 kVA 680 kVA 1080 kVA 1260 kVA 1360 kVA

Nominal MV voltage Up to 36 kV

Frequency 50 Hz / 60 Hz

Power factor range (cosφ) 0,80 leading to 0,80 lagging

Inverter Type 1×XC540 1×XC630 1×XC680 2×XC540 2×XC630 2×XC680

Nominal output voltage 300 V 350 V 380 V 300 V 350 V 380 V

Auxiliary power connection Voltage 400 Vac 3 phases + neutral (Neutral grounded)

Frequency 50 Hz / 60 Hz

Auxiliary power 10 kVA / (35kVA for High Pollution/Desert Hard)

Cooling PV Box low pollution Ventilation ensured by inverter fans : 2x4000 m3/h

PV Box moderate pollution Ventilation ensured by inverter fans (2x4000m3/h) & 2 Filter Box (2x5600m3/h)

PV Box high pollution/desert hard Air Conditioning

Transformer cooling method ONAN Transformer and Forced air cooling for desert hard

Dimensions and weight Nominal dimensions (transportation) (L/W/H) 12,19m / 2,44m / 2,9m (40” / 8” / 9.5”)

Overall dimensions (Assembled on site) (L/W/H) 12,19m / 3,38m (or 3,28m*) / 2,9m

Weight <20 Tons

Degree of protection Degree of protection IP54 (Inverter compartment) IP23d (Transformer compartment) IP54 (RMU compartment)

* Width is 3,28m in case of Filter Box (internal) u sage for moderate pollution environment



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3.2. Operating mission profiles

According to the solar farm project location, one of the following mission profile shall be used:

Low Pollution Moderate Pollution High Pollution

Mission profile Temperate Tropical Continental

Temperate Desert

Tropical Continental Desert hard

Maximum operating temperature(1)

+50°C +50°C +50°C +50°C +55°C

Minimum operating temperature

-20°C -35°C -20°C -35°C -5°C

Environment example Rural Urban, Industrial, Desert Desert Hard

Dust (IEC 60721-2-5 (§4.2.4)) Size<150µm

Concentration<0,1mg/m3 Concentration<2mg/m3 Concentration>2mg/m3

Sand No Yes Yes

Salinity(2) No Moderate Moderate

Salinity (ISO 12944-2(§5.1.2)) C2 C3 C3

High Salinity option (Water resistant filter, C5 Paint on enclosure and transformer)

No Available Available

Maximum absolute humidity (g/m3)

36

Maximum relative humidity (%)

100%

Maximum elevation(3) 2000m

Presence of snow flakes Yes

Maximum snow load (kg/m²)

250

Presence of ice, frost Yes

Resistance to hailstones Yes

Maximum wind speed (m/s)

50

Biological: Flora & Fauna (IEC 60721-3-4)

4B1

(1) Power derating above 40°C (external temperature). (2) Salinity level

No wind from sea Prevailing wind from sea

5km 1km

Low Pollution Moderate Pollution

Moderate Pollution Moderate Pollution with High Salinity

Option

Moderate Pollution with High Salinity Option

Moderate Pollution with High Salinity Option

Sea

(3) Power derating above 1000 m. Above 2000 m special requirements. (4) IEC 60721-3-4: 4B1: No harmful hazard from fauna & No harmful hazard from flora and/or mould growth



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3.3. External connections to PV Box:

The links to PV box are:

• DC cables: Qty: max 2x300mm2 x 2 polarities x n arrays box x n inverters in 200 mm diameter cable ducts. Those cables ducts can arrive from any directions to PV box.

• MV cables: Qty: 3x1x150mm2 x 2 connections in 160mm diameter cable ducts. Those cables ducts can arrive also from any directions to PV box.

• LV auxiliary + Communication to Array Box: Qty: 4x3G6mm2 + RS485 in 63mm diameter cable ducts.

• Communication between PV Box: Optical fiber and RS485 in 63mm diameter cable ducts.



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3.4. Enclosure design

The PV box enclosure is based on a 40’ “High Cube” container as shown on the figures below: Mineral wool is used to insulate the walls and the roof of the PVBOX. Here below views of the PV Box arrangement for the configurations with two inverters. Top view : Example of 36 kV / 2 inverters PV Box

PV Box 3D view: Example of 36 kV / 2 inverters PV Box



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4. Main electrical equipment features 4.1. Inverter

The power conversion system of the PVBOX is the XC series inverter. According to the PV Box type, XC540, XC630 or XC680 can be chosen.

Inverter Drawing:



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Electrical data (XC540, XC630 and XC680) :



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4.2. MV switchgear

Two MV switchgear references: • RM6 NE-DI (Radial topology) up to 24 kV • Flusarc CB-C(Radial topology) up to 36kV In any case, transformer is protected by a Circuit Breaker cubicle with SEPAM 10 protection relay. Switch cubicles are used to connect upstream and downstream MV cables coming from other PV Boxes or Grid Main Substation. Single Line Diagram :

Electrical features :

Description Unit Value

RM6 RM6 Flusarc

Rated voltage kV 12 24 36

Frequency Hz 50 50 50

Short-circuit current (1 sec.) kA 16 16 16

Rated withstand voltage at power frequency: 50Hz/1 min kV rms 50 50 70

Rated impulse withstand voltage : 1.2/50µs kV peak 125 125 170

Auxiliary motors (for motorized version) Vdc 48 48 48

Auxiliary supply voltage Vac 230 230 230

Number of mechanical opening operations 2000

RM6 – 24kV Flusarc – 36kV



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4.3. MV / LV transformer

The transformer is used to increase inverter output voltage to MV level, and to realize a galvanic insulation between LV and MV. Description : • Three-phases three windings mineral oil distribution transformer complying IEC • Aluminum windings (or copper for some versions) • Limited inrush current (< 10 In) • Hermetically sealed or screwed, oil transformer • RAL 7033 final color • ONAN cooling type • New mineral oil in according to the IEC 60296 – Specific to high temperatures • Outdoor installation • Compliance to IEC 60076-1 to 10 • Electrostatic screen between primary and secondary windings Electrical Characteristics :

Rated primary power (kVA) 540 630 680 1080 1260 1360

Rated primary ON LOAD voltage(1) (V) Up to 36 kV Up to 36 kV Up to 36 kV Up to 36 kV Up to 36 kV Up to 36 kV

Rated secondary voltage (V) 300V 350V 380V 300V-300V 350V-350V 380V-380V

Off load tap changer (%) ±3,5% and

±7% ±3,5% and

±7% ±3,5% and

±7% ±3,5% and

±7% ±3,5% and

±7% ±3,5% and

±7%

Rated secondary power (kVA) 540 630 680 540/540 630/630 680/680

Vector group Dy11 Dy11 Dy11 Dy11y11 Dy11y11 Dy11y11

Maximum no load losses (W) C0 C0 C0 C0 C0 C0

Maximum On load losses (W) Bk Bk Bk Bk Bk Bk

Short circuit impedance (%) 6 6 6 6 6 6

Sound power level LWA dB(A) 59 60 61 63 64 64

Temperature rise of oil/windings (K) 60/65 60/65 60/65 60/65 60/65 60/65

(1): Contractual voltage at the connection point Accessories :

• DGPT2 or DMCR protection relay • 3 x plug-in bushing (250A up to 24kV and 400A up to 36kV) • 3 x LV bushings (1250A) by secondary • 1 thermostat (for the desert/tropical version only) • Valves for oil filling, draining and sampling • 2 x earthing terminal on the tank • 4 x bidirectional rollers under the tank • 2 x lifting lugs • IP2X protection on the LV bushings • Rating and diagram aluminum plate



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4.4. DC Box

The DC Box makes the connection and protection of cables from Arrays Boxes to inverters. The DC Box is available in 6 or 10 feeders and each of them can be optionally monitored. The protection is made on the two polarities with gPV fuses, up to 1000Vdc, with a large choice of rated current (160 A to 400A). Fuses are not included in the offer. DC Box are supplied with fuse holders. 3D View & Picture: Example of DC box 6 ways monitored



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DC Box Electrical data :



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4.5. LV Box

The LV Box includes all devices required to supply and to protect PV Box auxiliaries:

• MV switchgear • PV Box auxiliaries • DC Box (if applicable) • Filter Box (if applicable) • PV Box Monitoring Cabinet (if applicable)



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4.6. Auxiliary transformer

Technical data

Primary Inputs values Nominal voltage V ~ Three-phase 300V, 350V and 380V

frequency Hz 50-60 Hz (+/- 3 Hz) Secondary Nominal output Voltage V ~ Three-phase 230V / 400V Power VA 10 000 // 35 000 (High Pollution/Desert Hard) Protections Against short circuits

Against overload Against over voltage

External Load losses W 200

Voltage short circuit ~ 230 % 3.8

Isolation

Isolation level 1500 V Primary / secondary

4.7. Monitoring cabinet integration (Optional)

The monitoring cabinet is optimized to work Schneider Electric PV Plant SCADA: CONEXT CONTROL. The monitoring cabinet includes all devices required by this SCADA system in order to control and monitor the PV box. Cubicle overview:



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5. Your PV Box ST configuration

PV Box ST Configuration Equipment Included in

the offer

(√√√√)

Pro

ject

Power

540kVA 1 XC540 + 1 Tfo 540kVA

630kVA 1 XC630 + 1 Tfo 630kVA 680kVA 1 XC680 + 1 Tfo 680kVA 1080kVA 2 XC540 + 1 Tfo 1080kVA 1260kVA 2 XC630 + 1 Tfo 1250kVA 1360kVA 2 XC680 + 1 Tfo 1360kVA

Grounding system

Positive Negative Floating Ground Fault Relay Option Germany

Grid Voltage

0kV - 12kV RM6 12kV 2 functions 12kV - 24kV RM6 24kV 2 functions

24kV - 36kV Flusarc 36kV 2 functions

Env

ironm

ent

Mission Profile

Low Pollution – Temperate/Tropical

Low Pollution - Continental

Moderate Pollution – Temperate/Tropical/Desert Filter Box

Moderate Pollution - Continental Filter Box

High Pollution - Desert hard Air Conditioning System

DC

sid

e

DC input

Max 2x6 inputs DC Box 6* Max 2x10 inputs DC Box 10*

DC Inputs monitored DC Box Monitored

* DC Box: DC Box are supplied with fuse holders. Fuses are no t part of the PV Box supply and shall be ordered separately.



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**Accessories: � 3 fluorescent tube 36W � 3 bases for fluorescent tube 1x36W � 1 outdoor lamp � 2 electrical convectors � 2 sockets � 2 emergency stop push button � 2 emergency lighting � 1 PV Box identification label

PV Box ST Configuration Equipment Included in

the offer

(√√√√)

Mon

itor

& C

ontr

ol Without Monitoring

With Conext Control Integration

(Conext Control shall be proposed

separately)

Optimum+ (measurement in Array Box)

Wiring and cabling of Monitoring cabinet Optimum+

Optimum (measurement in DC Box)

Wiring and cabling of Monitoring cabinet Optimum

Essential Wiring and cabling of Monitoring cabinet Essential

Sta

ndar

d

Equ

ipm

ent

LV Box

LV/LV Transformer

Accessories**

Opt

ions

Automatic Progressive Reconnection MV Switchgear CB

motorization & RMU Box

Safety Kit

1 powder fire-extinguisher 1 insulated rod (MV)

1 casing with insulated gloves

2 anti-panic bars on doors (LV& MV compartment)

1 insulating stool

Service Kit (Only possible with Conext Control

Optimum+/Optimum)

Doors contacts & Fire detector

Support Kit for weather sensor (Only possible with Conext Control

Optimum+/Optimum)

Brace, Manual to install it on site

High salinity environment Water resistant filters F9

External paint on container and transformer

Centralized Auxiliaries Power Supply No LV/LV transformer



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6. Project specific comments and exclusions The PVBox is designed to be “plug and play”, which means once arrived on site, the only works to execute on a PVBox are:

Crane it down on a flat, civil work prepared ground in accordance with geotechnical survey – Out of scope Connect DC power cables – Out of scope Connect LV cables for Array Boxes supply – Out of scope Connect Profibus communication cables – Out of scope Connect Optical Fiber communication cable – Out of scope Connect power MV cables from Solar Farm. – Out of scope Fill with gravels the top of transformer’s retention tank to obtain a fire trap – Out of scope PVBox installation must be achieved in accordance with installation manuals.

Commissioning – Out of scope (Punch list of visual inspections and off load tests is deemed clear prior to Commissioning)

The cable inlets in the PV Box shall be sealed to prevent the entrance of water and animals, and equipped with waterproof devices – Out of scope The positioning of the cables connecting to the panels shall minimize their degree of curvature inside the ducts.



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7. Single Line Diagram

pv box st technical specification_v01.pdf

Documents

rigoni c

froidurot c

new version

mission profiles

mechanical structure

electrical structure

environmental mission

dimensions updates