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A online early warning method for power grid protection relay setting based on mode change effect range identification and fault result ordering |
DOI:10.19783/j.cnki.pspc.181246 |
Key Words:protection relay setting value online warning mode change domain of influence |
Author Name | Affiliation | E-mail | LI Yiquan | Controlling and Dispatching Center of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China Key Laboratory for Protective Relaying Real Time Digital Simulation of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China | | WANG Feng | Controlling and Dispatching Center of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China Key Laboratory for Protective Relaying Real Time Digital Simulation of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China | | WU Ziliang* | Controlling and Dispatching Center of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China Key Laboratory for Protective Relaying Real Time Digital Simulation of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China | wu_ziliang@foxmail.com | YI Jiang | Hubei Electric Power Security and High Efficiency Key Laboratory, Huazhong University of Science and Technology, Wuhan 430074, China | | SHI Dongyuan | Hubei Electric Power Security and High Efficiency Key Laboratory, Huazhong University of Science and Technology, Wuhan 430074, China | |
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Abstract:A fast online early warning method for power grid protection relay setting based on mode change effect range identification and fault calculation result ordering is proposed. This method uses the rate of change of current and branch coefficient value at protection relay installation point to determine the protection relays that should change their setting values to accommodate the tripping off of line or transformer. And in order to further improve the speed of the on-line analysis of the protection relay setting, the order optimization of the short circuit calculation result is carried out. Thus the online early warning of protection relay setting can be achieved. The practical application shows that this method can quickly and accurately warn the special operation mode and protection relay of the power grid with hidden danger. This work is supported by National Natural Science Foundation of China (No. 51777081) and Science and Technology Project of Guangdong Power Grid Co., Ltd. (No. GDKJQQ20161176). |
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