Coordinated Control Strategy of Large-Scale Wind Power Generation Sending System under Mono-Polar Block Fault
Luo Yue1, Yao Jun1, Zhang Tian1, Pei Jinxin1, Zhang Feng2
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China; 2. State Grid Xinjiang Electric Power Dispatching and Control Center Urumqi 830001 China
Abstract：When the mono-polar blocking fault occurs at the sending converter of the high voltage direct current (HVDC) transmission system, the reactive power of the alternating current (AC) sending system will be surplus, which lead to the swell of the voltage of the AC sending system. For ensuring the sending system can operate in stability and security, the power flow of the sending system under HVDC system mono-polar blocking fault has been analyzed firstly. Furthermore, the mechanism of the overvoltage of sending system has been investigated. Combining the power controllable operation area of the doubly fed induction generator (DFIG) and the short-time overload capacity of the converter, the fault ride through control strategy by coordinating the DFIG and HVDC system converter is designed. The simulated results show that the proposed scheme can restrain the AC system’s overvoltage of HVDC system converter under mono-polar blocking fault and also ensure that the large-scale DFIG-based wind farms do not trip off the grid during the fault, which effectively enhancing the transient stability of the HVDC sending system.
骆悦, 姚骏, 张田, 裴金鑫, 张锋. 大规模风电直流外送系统单极闭锁场景下送端系统协调控制策略[J]. 电工技术学报, 2019, 34(19): 4108-4118.
Luo Yue, Yao Jun, Zhang Tian, Pei Jinxin, Zhang Feng. Coordinated Control Strategy of Large-Scale Wind Power Generation Sending System under Mono-Polar Block Fault. Transactions of China Electrotechnical Society, 2019, 34(19): 4108-4118.
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2019, Vol. 34 
