具备LVRT能力的光伏接入配网对重合闸的影响及对策

李育强; 王志文; 王维庆; 晁 勤

引用本文:	李育强,王志文,王维庆,等.具备LVRT能力的光伏接入配网对重合闸的影响及对策[J].电力系统保护与控制,2016,44(15):61-67.
	LI Yuqiang,WANG Zhiwen,WANG Weiqing,et al.Influence of PV with LVRT capability access to distribution network on automatic reclosing and its countermeasures[J].Power System Protection and Control,2016,44(15):61-67

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具备LVRT能力的光伏接入配网对重合闸的影响及对策
李育强¹,王志文²,王维庆¹,晁勤¹
(1.新疆大学电气工程学院，新疆乌鲁木齐830047;2.清华大学电机系，北京 100084)

摘要:

在实现光伏电站低电压穿越(Low Voltage Ride Through，LVRT)的基础上，分析了光伏电站接入配电网LVRT对前加速自动重合闸的影响。根据故障发生的位置不同，基于时域分析对LVRT和前加速自动重合闸的延时进行整定，提出了光伏电站LVRT与前加速自动重合闸的配合方案。该方法能够解决前加速重合闸重合时间与LVRT时限不匹配，导致并网点电压二次跌落和瞬时性故障发展成为永久性故障的问题。通过在电磁暂态仿真软件(Power Systems Computer Aided Design，PSCAD)中建立仿真模型，在10 kV配电网中验证了所提方法的有效性和正确性。

关键词: LVRT 光伏电站配电网前加速自动重合闸 PSCAD

DOI：10.7667/PSPC151509

分类号:

基金项目:国家自然科学基金(51367017，51267019)

Influence of PV with LVRT capability access to distribution network on automatic reclosing and its countermeasures

LI Yuqiang¹,WANG Zhiwen²,WANG Weiqing¹,CHAO Qin¹

(1. School of Electrical Engineering, Xinjiang University, Urumqi 830047, China;
;2. Dept of Electrical Engineering, Tsinghua University, Beijing 100084, China)

Abstract:

On the basis of realizing the function of LVRT in photovoltaic power station, effect of LVRT pre-accelerating automatic reclosing is analyzed when PV plants access to the distribution network. According to the different fault location, the LVRT and pre-accelerating automatic reclosing delay setting based on time-domain analysis, the cooperation scheme of LVRT and the pre-accelerating automatic reclosing is proposed. This method can solve the problem that the voltage drop of second times and the transient fault will develop into a permanent fault due to the coincidence of the pre-accelerating automatic reclosing and the LVRT time does not match. A simulation model is established in PSCAD, the validity and correctness of the proposed method are verified by the 10 kV distribution network. This work is supported by National Natural Science Foundation of China (No.51367017 and No.51267019).

Key words: LVRT photovoltaic power station distribution network pre-accelerating automatic reclosing PSCAD

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