摘要
针对特高压(UHV)工程接入使得电网规模不断扩大、短路电流水平持续升高,导致电网安全稳定运行隐患变大的问题,提出一种基于电网可靠性的限流器优化配置方法。通过短路计算,量化评估电网的可靠性,实现短路影响下的可靠性分析。建立可靠性评估与短路电流、负荷损失量之间的量化模型,根据可靠性量化结果,确定限流器的候选安装点。采用粒子群优化算法,以电网短路下可靠性水平、限流器数量最少为目标,对限流器的布点进行优化。最后以某省实际电网为例,结果表明,这一方法可缩小最优解的搜索空间,实现限流器的优化配置,并有效地限制短路电流,提高电网运行可靠性。
Ultra-high voltage(UHV)project access makes the scale of power grid expand continuously,and the level of short-circuit current continues to rise,which leads to the greater hidden danger of safe and stable operation of power grid.To solve this problem,a method of optimal configuration of current limiter based on power grid reliability is proposed.Through short circuit calculation,the reliability of power grid was evaluated quantitatively,and the reliability analysis under the influence of short circuit was realized.The quantitative model between reliability evaluation and short-circuit current as well as load loss was established.According to the quantitative results of reliability,the candidate installation points of current limiter were determined.Particle swarm optimization algorithm was used to optimize the distribution of current limiters,aiming at the reliability level and the minimum number of current limiters under short circuit.Finally,taking the actual power grid of some province as an example,the results show that this method reduces the search space of the optimal solution,realizes the optimal configuration of current limiter,and effectively limits the short-circuit current.It is proved to improve the reliability of power grid operation.
作者
章勇高
李小蓓
方华亮
龚俊
ZHANG Yong-gao;LI Xiao-bei;FANG Hua-liang;GONG Jun(School of Electrical and Automation Engineering,East China Jiaotong University,Nanchang 330013,China;School of Electrical Engineering,Wuhan University,Wuhan 430072,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2020年第6期81-89,共9页
Electric Machines and Control
基金
国家自然科学基金(51467006)。
关键词
短路电流
可靠性
故障限流器
优化配置
粒子群优化算法
特高压
short circuit current
reliability
fault current limiter
configuration optimization
particle swarm optimization algorithm
ultra-high voltage
作者简介
章勇高(1975-),男,博士,副教授,研究方向为电力电子在电力系统中的应用、新能源发电系统;通信作者:李小蓓(1993-),女,硕士研究生,研究方向为电力系统短路计算;方华亮(1977-),男,博士,副教授,研究方向为电力系统控制与通信;龚俊(1994-),男,硕士研究生,研究方向为电力数据分析。
