interflex – european project · interflex: demo2 (use case 2) 13 increase der hosting capacity in...

INTERFLEX – EUROPEAN PROJECTINTERFLEX INTRODUCTION

CZECH WORK PACKAGE (DEMO2)

INTERFLEX: DEMO2 USE CASES

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Use cases covers the most urgent challenges of DSOs (increasing DER hosting capacity, EV charging stations implementation, energy storage)

CEZ Distribuce use cases:

Increase DER hosting capacity of LV distribution networks by smart PV inverters

Increase DER hosting capacity in MV networks by volt-var control

Smart EV charging

Smart energy storage

INTERFLEX

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INTERFLEX

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Each of Demo is focused on different applications/functions

Demos are lead by European DSOs

INTERFLEX: DEMO2 PARTNERS

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INTERFLEX: DEMO2 LOCATIONS

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Demonstration is not concentrated to the one region in order to prove the interoperability of tested solutions

DEMO2 AREAS

INTERFLEX: DEMO2 GOALS

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Tasks:The project aims to demonstrate functions before those become business as usualThe overall goal is to increase DER hosting capacity and integrate EVs smoothly

Primary goals:Integration of PVs with smart inverters: volt-var and volt-watt control functionsVolt-var control of DER in MV network: PV, Wind, BiogasDevelopment of smart EV charging stationsIntegration of PVs with energy storage (batteries)

Secondary goals:Prove interoperability of tested solutionsProposals for business modelsCBALocal authorities engagement

INTERFLEX: DEMO2

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2016 2017 2018 2019

Preparation and planning phaseImplementation phaseEvaluation and end of the project

Demo 2 deliverables:D6.1 Design of solutions – month 12D6.2 Implementations of solution - month 24D6.3 Demonstration activities results - month 36

Technical design interoperability tests in lab implementation testing evaluation

INTERFLEX: DEMO2 (USE CASE 1)

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Increase DER hosting capacity of LV distribution networks by smart PV inverters

Smart PV inverters equipped with s Q(U) and P(U) functions allow increasing of DER hosting capacity

Q(U) and P(U) functions work autonomously without the need of communication towards DSO

Within Interflex project in 2 areas, CEZ Distribuce will allow connection of more PVs (areas have a different topology of LV grid)

Based on results, CEZ Distribuce will propose grid code update (calculation for DER hosting capacity) in order to allow more connection of DER in LV networks which are equipped with Q(U) and P(U) functions


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Function defined in standard EN 50438:2013 and CENELEC TS 50549:1 – Q(U)

over excited

under excited

Q/Qmax


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Function defined in standard EN 50438:2013 and CENELEC TS 50549:1 – P(U)


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Area T ptín (Kamenice)


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Area Divišov (Benešov)


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Increase DER hosting capacity in MV networks by volt-var control

Existing DERs (PV 4,8MW, Wind 4,6MW, Biogas 1,25MW) connected to the MV network will be retrofitted with volt-var control in order to secure smoother integration and lower voltage fluctuations in the distribution system

DERs will receive voltage set points from CEZ Distribuce DMS (through existing GPRS communication path) and regulate generation/consumption of reactive power in order to eliminate the difference between received voltage set points and instantaneous voltage values which are continuously measured in the point of connection

Based on results, CEZ Distribuce will propose grid code update (calculation for DER hosting capacity) in order to allow more connection of DER in MV networks which are equipped with volt-var control system


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Example of volt-var control strategy of CHP in MV network

DERs will provide reactive power within limits cos phi 0,95ind. – 1 – 0,95cap.DERs were preselected in project preparation phase

-0,6

-0,4

-0,2

0

0,2

0,4

0,6

35,375

35,55

35,725

35,9

36,075

36,25

36,425

Uregulované [kV]

Um ené [kV]

Q [MVAr]

Voltage set point [kV]

Instantenous voltage [kV]

Reactive power [MVAr]


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Volt-var control for DER connected to MV network


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Biogas station D tenice 1,25 MW


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Wind park Kop ivná – 4,6 MW PV Žamberk - 1,1 MW


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Smart EV charging

EV charging stations will be equipped with smart functions for securing smoother integration into the existing distribution networks

Charging stations power output will be limited to 50% in case of under frequency, under voltage or in case of receiving signal from CEZ Distribuce (through narrow band one way simple PLC communication)

Power quality during EV charging will be tested as well (most of existing EVs could be equipped with single phase AC chargers with power over 3,7kW = risk of voltage unbalance). Proposals for EN 61851 standard modification are expected.


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Example of single phase AC charging and DC charging (powered by 3phases on AC)

time


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Smart EV charging solutions will be provided by Demo2 partners


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Hradec Králové – smart charging stations (2xSchneider Electric)


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ín – smart charging station (1xSiemens with 2x Mennekes connectors)


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Smart energy storage

Smart hybrid PV inverters + home energy storage (batteries) allow increasing of DER hosting capacity

Energy storage will provide power to the distribution network in case of under frequency, under voltage or in case of receiving signal from CEZ Distribuce (through narrow band one way simple PLC communication)

Limitation of PV feed-in power into the distribution network to 50% of PV installed capacity thanks to the external meter and home energy storage

Solution will be tested in one area (in LV network)


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Smart energy storage – example of system with PV feed-in power limitation


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Area Lužany (Ra ice nad Trotinou)

END OF PRESENTATION

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Thank you for your attention.

interflex – european project · interflex: demo2 (use case 2) 13 increase der hosting capacity in...

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