Inverter functions for active voltage control: control and communication

Transcription

1 Inverter functions for active voltage control: control and communication Y. Tarek Fawzy, Claus Allert IEA PVPS Workshop Brussels Agenda General Introduction SMA activities in metapv Local Voltage control Storage systems Y. Tarek Fawzy, IEA PVPS Workshop Brussels 2

2 SMA: Strong presence in 21 countries all over the globe 25 gigawatts installed SMA inverter power worldwide Round about 1000 professionals in research and development Canada Chile U.S. Germany Belgium Czech Republic France Greece Italy Poland South Africa Portugal Spain United Kingdom Australia China India Japan South Korea Thailand United Arab Emirates 3 Photovoltaics in Germany & Europe Germany 66 GW of renewables (PV, Wind, Bio, Hydro, ) 1 Total power consumption 50 to 90 GW 1 Majority of PV power in LV networks ( 75 %) 1 Europe/EPIA outlook 2 Up to 155 GWp PV power within next 4 years Share of renewable generation increases Increasing influence of renewables on energy system How much distributed generation (DG) can be integrated into the energy systems? Installed power [GWp] PV in Europe (EPIA policy-driven scenario) 50 Performance of PV in Germany Germany Italy Spain Rest of Europe Source: 1 BMU, 2 EPIA, 3 SMA 4

3 Agenda General Introduction SMA activities in metapv Local Voltage control Storage systems Y. Tarek Fawzy, IEA PVPS Workshop Brussels 5 6 Developments of PV system technology for additional PV benefits (WP2) Voltage control Active and reactive power control Peak shaving and Power shifting Development tasks Operation algorithms for residential and commercial inverters Communication interfaces Autonomous control for storage systems 4 Source: : 4-- THE META PV PROJECT: PHOTOVOLTAICS FOR ACTIVE DISTRIBUTION SYSTEMS, T. Vu Van et al.

4 Agenda General Introduction SMA activities in metapv Local Voltage control Storage systems Y. Tarek Fawzy, IEA PVPS Workshop Brussels 7 8 Development of operation algorithms for residential and commercial inverters Grid Support with active and reactive power Constant and variable voltage control modes local or supervisory control unit using suitable communication interface Grid management and feed-in structure of a smart PV inverter [3] Source: 3: Active contribution of PV inverters to voltage control - From a smart grid vision to full-scale implementation, Tarek Fawzy et al

5 9 Variable voltage control modes Methodology: Local regulation Q(V) Q P r Parameters are to be effectively defined based on the penetration level of PV in the network Laboratory validation Q k = V V V n 10 Variable voltage control modes cos ϕ Methodology: Local regulation PF(P) Q = ± P cos ϕ Parameters are to be effectively defined based on the penetration level of PV in the network P P r Laboratory validation

6 Agenda General Introduction SMA activities in metapv Local Voltage control Storage systems Y. Tarek Fawzy, IEA PVPS Workshop Brussels for residential PV systems Active Power reduction on demand (Feed-in Management) Reactive power provision on demand/ on schedule Parameter adjustment Monitoring of the system Implementation Concept

7 13 for commercial PV systems Grid Support with active and reactive power Supervisory DSO control using IEC Coordinated control based on network parameters Q=f(grid impedance, maximum voltage) Concept 14 for commercial PV systems Simulated scenario based on generation and load profiles provided by DSO Voltage regulation according to EN Optimization and equal distribution of required total reactive power Voltage Sensitivity analysis EN upper voltage limit Source: Coordinated voltage control of Photovoltaic plants in smart distribution power grids, IRED 2012 Yehia Tarek Fawzy, Stijn Stevens, Benoît Bletterie, Wim Deprez, Bernd Engel, Gerd Bettenwort

8 Agenda General Introduction SMA activities in metapv Local Voltage control Storage systems Y. Tarek Fawzy, IEA PVPS Workshop Brussels Residential PV systems with storage Grid Support with active and reactive power (P(V), Q(V)) (Q,P settings) Backup power supply Autonomous operation e.g Power shifting/peak shaving Concept

9 Commercial PV systems with storage (Concept) Router IEC-Gateway Sunny Webbox External control PV inverter Meter Battery inverter Battery inverter Peak-shaving reactive power provision THANK YOU FOR YOUR ATTENTION Y. Tarek Fawzy, IEA PVPS Workshop Brussels 18

10 M. Eng. Yehia Tarek Fawzy PV-System Technologies Pleased to answer your Questions SMA Solar Technology AG Sonnenallee Niestetal Tarek.Fawzy@SMA.de 20 Constant voltage control modes Q and PF-Fix P P limit ΔP = P limit P max 18,2 = arccos (0,95) QIV = S max (1- cos ϕ) = S max * 5% Smax Q max,ind. S max QI Q max = S max * 31,2 % S max P max S max Q kapazitiv Q max,kap. Q max,ind. Q induktiv Reserve

11 Meta-PV with storage: Industrial solution for Peak-Shaving quasi autonomous operation using Feed-In -Mode Feed-In Set-point Feed in setpoint PV generation Current limitation Charge limitation Discharge limitation charged stored direct Charge limit discharged Use Feed-In -Mode Active and reactive possible ( selling ) Within SOC-Limits (e.g. >= 50%SOC) Use of Inverter limits Grid current (charging) (e.g. 3A) Charge current (e.g. max. 22A) Discharge current (e.g. 10A) Reserve 21