A Novel Voltage Sag Generator for Grid-Connected PV System's Low Voltage Ride-Through Test

Abstract:

A novel voltage sag generator (VSG) is proposed for grid-connected photovoltaic (PV) systems low voltage ride-through (LVRT) test. The topology and parameters of the current-limiting reactor group, grounding reactor group and bi-directional thyristor valve of the VSG is designed to generator voltage sags with several sag depths and phase angles. Furthermore, for a 250kW grid-connected PV inverter modeled by real-time digital simulator (RTDS), LVRT simulations in different sag depths at different phase angles are done with the VSG. Simulation results show that the proposed VSG has reasonable design and can reveal adequately how the voltage sag depths and phase angles influent the LVRT results.

• Periodical: Advanced Materials Research (Volumes 805-806)
• Pages: 70-73
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.805-806.70
• Online since: September 2013
• Authors: Fei Zheng*, Ming Chang Ding, Jun Jun Zhang
• Keywords: Grid-Connected Photovoltaic (PV) System, Low Voltage Ride through (LVRT), Real Time Digital Simulator (RTDS), Topology, Voltage Sag Generator (VSG)

References

[1] M. Tsili and S. Papathanassiou, A review of grid code technical requirements for wind farms, Renewable Power Generation, IET, vol. 3, no. 3, p.308–332, Sept. (2009).

DOI: 10.1049/iet-rpg.2008.0070

[2] Q/GDW 617: China State Grid Corporation's standard Technical rule for photovoltaic power station connected to Power Grid, (In Chinese), (2011).

[3] HU Shuju. Development of a Novel Voltage Sag Generator for Wind Power System (In Chinese)[J]. Converter Technology & Electric Traction, 2009, (6): 49-52.

[4] Yan Ma, Karady, G.G. A single-phase voltage sag generator for testing electrical equipments [C]. 2008 IEEE/PES Transmission and Distribution Conference and Exposition, Chicago, IL, 2008: 1-5.

DOI: 10.1109/tdc.2008.4517185

[5] ZHAO Jing, ZHOU Peng, ZHANG Wei. Voltage sag generator for wind power generation system (In Chinese)[J]. Power Supply Technology and its Application, 2009(12): 74-76.

[6] LIANG Liang, LI Jian- lin, ZHAO Bin, XU Hong- hua. Development of voltage- dip generator for wind power system (In Chinese)[J]. Renewable Energy Resources, 2007, 25(3): 64-67.

[7] Zhang Bo, Yan Xiangwu, Wang Shuqi. Method of three-phase voltage sag forming based on dq transformation (In Chinese)[J]. Transctions of China Electrotechnical Sociaty. 2011, 26(10): 55-61.

[8] Zheng Fei, Zhang Junjun, Ding Mingchang. Study on Modeling and Control Strategy of Photovoltaic Low Voltage Ride-Through System based on RTDS (In Chinese)[J]. Automation of Electric Power Syetems, 2012, 36(22): 1-6.

[9] Zheng Fei, Zhang Junjun, Ding Mingchang. A Novel Voltage Sag Generator for Low Voltage Ride-Through Test of Grid-connected PV System[C]. Proceedings of 2012 IEEE International Conference on Computer Science and Automation Engineering, Zhangjiajie, China, 2012, 5: 136-140.

DOI: 10.1109/csae.2012.6272744