Integration of RES in MV / LV grids Experiences from Field tests and current projects

Transcription

1 Integration of RES in MV / LV grids Experiences from Field tests and current projects IEA DSM Task XVII Workshop Arnhem/Oosterbeek Matthias Stifter

2 Content MV grid DG DemoNet - experiences from field trials LV grid ISOLVES / Smart LV Grid 2

3 DG DemoNet Keeping voltage limits by integration of distributed generation (DG)

4 DG DemoNet (1) Distributed control (level control) 110 kv Control of tap changer according to voltage measurements from the grid (critical nodes) CVCU 110/30 kv 30 kv Information about the grid state is required ICT necessary M2 DG4 DG1 DG5 DG1 DG2 M1 DG6 M3 DG3 4

5 DG DemoNet (2) Coordinated control (level + range control) 110 kv Control of tap changer according to voltage measurements from the grid (critical nodes) CVCU 110/30 kv 30 kv Control of reactive power (Q) and as a last measurement reactive power (P) Impact of Q/P on the critical nodes (voltage sensitivity) are in a linearised model the contribution matrix DG1 M2 DG4 DG1 DG5 Local controller (in case of failure) DG2 M1 DG6 M3 Information about the grid state is required ICT necessary DG3 5

6 DG DemoNet controller concept The following indicators are used: over voltage voltage band lower voltage range: distance between highest and lowest voltage measurement Two separate controllers: level control: tap changer position at the substation range control: control of Q(P) at the distributed generator (if the range is greater than the voltage band) 6

7 DG DemoNet controller design Eingabe-maske Netzkonfiguration - Liste kritische Knoten - Liste aktive DEA - Beitragsmatrix Parameter - UOL / ULL -... Level Action Control Level Usoll=... Usoll Stufenregler (Eberle) Range Action Control Range Optimierung DQ, DP Kommunikation (PLC / Funk) DG DemoNetz-Regler (Central voltage control unit CVCU) 7

8 Field tests Open loop and closed loop tests

9 Communication Großes Walsertal Different communication media fibre cable PLC WiMax radio link 9

10 Field test DG Brunnenfeld (Substation Bürs) Without range control Voltage on 10kV side Voltage on 0,4kV side Reactive Power (Q) Active Power (P) 10

11 Field test DG Brunnenfeld (Substation Bürs) With range control Voltage on 10kV side Voltage on 0,4kV side Reactive Power (Q) Active Power (P) 11

12 Closed loop operation (1) 12

13 Closed Loop operation (2) 13

14 DIgSILENT Control strategy: Effective voltage band (independent) 1,0300 1,0200 1,0100 Range control tries to keep voltages within EVB with Q from the DG 1,0000 0,9900 0, E+5 0,80 0, E E E+5 [s] 2.061E+5 0,00-0,40-0,80-1, E E E E+5 [s] 2.061E+5 14

15 DIgSILENT Control strategy: Full voltage band (cooperative) 1,0300 1,0200 1,0100 Range control only activates Q when voltage limits are to get violated 1,0000 0,9900 0, E+5 1,00 0, E E E E+5 [s] 2.060E+5 0,00-0,50-1,00-1,50-2, E E E E E+5 [s] 2.060E+5 15

16 Low Voltage Distribution Networks Status quo in planning and operation

17 Low Voltage Networks Current state of operation and planning methods 17

18 Low Voltage Networks Real voltage and power profiles sec RMS values of voltages and powers of all nodes 18

19 PSSA Method Power SnapShot Analysis Synchronized measurements per meter (1 sec-rms) 3x voltages, 3x current, 3x active and 3x reactive power Trigger suggestions sent to dataconcentrator, where triggers are selected 19

20 Simulation of Szenarios Power SnapShot 20

21 Scenarios with PV Power Snap Shot with additional single phase PV 21

22 Towards a Smart LV Grid PV und Electric Vehicles are the main drivers for a Smart LV Grid PV and EV 22

23 Towards a Smart LV Grid PV und Electric Vehicles are the main drivers for a Smart LV Grid No PV 23

24 Towards a Smart LV Grid PV und Electric Vehicles are the main drivers for a Smart LV Grid No EV 24

25 Towards a Smart LV Grid PV und Electric Vehicles are the main drivers for a Smart LV Grid 25

26 Conclusion and Outlook Integration of DER DG: Integration with Volt/Var Control DR: Smart LV Grid Controllable Charging of Evs B2G: Shifting load by utilizing the thermal storage of the building 26

27 AIT Austrian Institute of Technology your ingenious partner Matthias Stifter Energy Department Electric Energy Systems AIT Austrian Institute of Technology Österreichisches Forschungs- und Prüfzentrum Arsenal Ges.m.b.H. Giefinggasse Vienna Austria T +43(0) M +43(0) F +43(0) matthias.stifter@ait.ac.at