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Placement optimization of Multi-Type fault current limiters based on genetic algorithm
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作者 Guofeng Jin Jie Tan +2 位作者 Lingling Liu Chuan Wang Tiejiang Yuan 《Global Energy Interconnection》 EI CAS CSCD 2021年第5期501-512,共12页
The fault current limiter(FCL)is an effective measure for improving system stability and suppressing short-circuit fault current.Because of space and economic costs,the optimum placement of FCLs is vital in industrial... The fault current limiter(FCL)is an effective measure for improving system stability and suppressing short-circuit fault current.Because of space and economic costs,the optimum placement of FCLs is vital in industrial applications.In this study,two objectives with the same dimensional measurement unit,namely,the total capital investment cost of FCLs and circuit breaker loss related to short-circuit currents,are considered.The circuit breaker loss model is developed based on the attenuation rule of the circuit breaker service life.The circuit breaker loss is used to quantify the current-limiting effect to avoid the problem of weight selection in a multi-objective problem.The IEEE 10-generator 39-bus system in New England is used to evaluate the performance of the proposed genetic algorithm(GA)method.Comparative and sensitivity analyses are performed.The results of the optimized plan are validated through simulations,indicating the significant potential of the GA for such optimization. 展开更多
关键词 fault current limiter Genetic algorithm MULTI-OBJECTIVE Circuit breaker loss short-circuit current PLACEMENT
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Single-phase earth fault current distribution between optical fiber composite overhead ground wire and ordinary ground wire in transmission system
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作者 许高雄 《Journal of Chongqing University》 CAS 2011年第2期78-83,共6页
It is important for the safety of transmission system to accurately calculate single-phase earth fault current distribution.Features of double sided elimination method were illustrated.Quantitative calculation of sing... It is important for the safety of transmission system to accurately calculate single-phase earth fault current distribution.Features of double sided elimination method were illustrated.Quantitative calculation of single-phase earth fault current distribution and case verification were accomplished by using the loop method.Influences of some factors,such as single-phase earth fault location and ground resistance of poles,on short-circuit current distribution were discussed.Results show that:1) results of the loop method conform to those of double sided elimination method;2) the fault location hardly influences macro-distribution of short-circuit current.However,current near fault location is evidently influenced;and 3) the short-circuit current distribution is not so sensitive to the ground resistance of poles. 展开更多
关键词 loop method single-phase earth fault short-circuit current distribution optical fiber composite overhead ground wire ordinary ground wire
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基于EEMD样本熵的直流牵引网故障电流识别 被引量:1
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作者 冷月 杨洪耕 王智琦 《中国测试》 CAS 北大核心 2016年第12期95-99,共5页
针对地铁直流牵引网的振荡电流容易引起继电保护系统频繁误动的问题,提出一种结合总体平均经验模态分解(ensemble empirical mode decomposition,EEMD)和样本熵的直流牵引网振荡电流与短路故障电流识别方法。利用EEMD方法对直流牵引网... 针对地铁直流牵引网的振荡电流容易引起继电保护系统频繁误动的问题,提出一种结合总体平均经验模态分解(ensemble empirical mode decomposition,EEMD)和样本熵的直流牵引网振荡电流与短路故障电流识别方法。利用EEMD方法对直流牵引网的馈线电流信号进行分解,求取各固有模态函数(intrinsic mode function,IMF)分量的样本熵值,并将计算结果求和,进而获得反映直流牵引网运行状态信息的特征量。通过对典型馈线电流信号进行分析计算,可知EEMD和样本熵相结合的特征提取方法可以有效地区分直流牵引网振荡电流与短路故障电流。算例分析验证该方法的有效性。 展开更多
关键词 短路故障电流 振荡电流 样本熵 总体平均经验模态分解 直流牵引网
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