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

doi:10.19595/j.cnki.1000-6753.tces.181337

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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.

Key words： High voltage direct current (HVDC) transmission system mono-polar block doubly fed induction generator (DFIG) coordinated control

Received: 06 August 2018 Published: 12 October 2019

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TM721

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	Luo Yue
	Yao Jun
	Zhang Tian
	Pei Jinxin
	Zhang Feng

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Luo Yue,Yao Jun,Zhang Tian等. Coordinated Control Strategy of Large-Scale Wind Power Generation Sending System under Mono-Polar Block Fault[J]. Transactions of China Electrotechnical Society, 2019, 34(19): 4108-4118.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181337 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I19/4108

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