Distance Protection Scheme for Interconnection Line of Doubly-Fed Induction Generator Based Wind Farm
Yang Zengli1, Kong Xiangping2, Wang Lijun1, Zhang Zhe3, Zhou Hubing1
1. State Grid Hubei Electric Power Company Wuhan 430077 China; 2. State Grid Jiangsu Electric Power Company Research Institute Nanjing 211103 China; 3. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China
Abstract Since the interconnection line of wind farm is the key for power transmission from wind farm to power grid, its operation safety plays an important role to operation stability of power grid. The complicated fault current characteristics of doubly-fed induction generator (DFIG) deteriorate the performance of the conventional distance protection schemes when they are applied on the interconnection lines of DFIG-based wind farm. Therefore, a new distance protection scheme is proposed in this paper. The proposed scheme is based on the R-L differential equation represented by the instantaneous values. Moreover, a series of measures ensures the accuracy of the measured fault distance, such as the low-pass filter, reconstruction of voltage at the fault point and iterative calculation of the fault distance. Simulation cases show that the performance of the proposed distance protection scheme is much better than that of the conventional distance protection schemes.
Yang Zengli,Kong Xiangping,Wang Lijun等. Distance Protection Scheme for Interconnection Line of Doubly-Fed Induction Generator Based Wind Farm[J]. Transactions of China Electrotechnical Society, 2016, 31(24): 252-260.
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2016, Vol. 31 
