引用本文: | 李智,张安安,胡志威,朱林,唐纲.小差比率制动系数校验的优化方案[J].电力系统保护与控制,2017,45(20):164-169.[点击复制] |
LI Zhi,ZHANG Anan,HU Zhiwei,ZHU Lin,TANG Gang.Optimization scheme of small range differential ratio braking coefficient test[J].Power System Protection and Control,2017,45(20):164-169[点击复制] |
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摘要: |
针对传统小差比率制动系数校验方法存在校验结果可能不准确的问题,从固定相位调节幅值校验方法出发,得到了其简化的等价模型,并根据校验需满足的条件,提出了一种小差比率制动系数校验新方法。该方法能保证校验过程中所测小差比率系数是母差差动动作所需满足条件中最后一个满足的条件,从而保证测得的小差比率系数必定是装置实际的小差比率制动系数门槛值。通过对常规比率差动的RCS-915AB装置和复式比率差动的BP-2CS装置的现场调试和校验,验证了所提方法的有效性和正确性。 |
关键词: 母差保护 比率制动 大差 小差 调试 校验 |
DOI:10.7667/PSPC161657 |
投稿时间:2016-10-08修订日期:2017-02-20 |
基金项目:国家自然科学基金项目(51107107);中国博士后基金面上项目(2014M562335) |
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Optimization scheme of small range differential ratio braking coefficient test |
LI Zhi,ZHANG Anan,HU Zhiwei,ZHU Lin,TANG Gang |
(State Grid Deyang Power Supply Company, Deyang 618000, China;School of Electrical Engineering and Information, Southwest Petroleum University, Chengdu 610500, China) |
Abstract: |
Aiming at the problem that the result of traditional small range differential ratio braking coefficient test method may not be correct, starting from the test method whose phase is fixed and amplitude is adjusted, its simplified equivalent model is obtained and a new method of small range differential ratio braking coefficient test is proposed according to the test conditions to be fulfilled. The method can ensure that the measured small range differential ratio coefficient is the last fulfilled one among all conditions which bus differential protection action needs to be fulfilled, so that the gotten small range differential ratio coefficient definitely is the actual small range differential ratio braking coefficient threshold of the protection device. The effectiveness and correctness of the proposed method are verified by on-site debugging and test of RCS-915AB whose ratio braking is conventional and BP-2CS whose ratio braking is complex. This work is supported by National Natural Science Foundation of China (No. 51107107). |
Key words: bus differential protection ratio braking overall differential small range differential debugging test |