协调经济性及事故评级的紧急减负荷控制优化方法Coordinated Emergency Load Shedding Control Optimization Algorithm for Economic Cost and Accident Assessment
陈庆;周海强;朱斌;苏大威;钱礼明;鞠平;徐春雷;张琦兵;
摘要(Abstract):
系统失去大功率电源后,要保持暂态稳定并过渡到新的稳态运行点,此时有可能需要补充一定量的减负荷控制,以消除断面超供、备用不足、频率偏低等问题。为降低减负荷控制的经济代价,同时使各负荷中心事故评级尽量均衡,提出了协调经济性及事故评级的紧急减负荷控制优化方法。首先,进行计及电网频率变化的增广潮流计算,并据此分析减负荷控制对系统静态运行点、频率及备用水平的影响;接着,以归一化的经济代价及减负荷率均衡性指标的加权和为目标函数,在考虑电压、支路潮流、频率偏移等约束的基础上,构建紧急减负荷控制优化问题的数学模型;然后,引入罚函数,将其转化为仅含潮流等式约束的优化问题,并应用改进粒子群算法求出最优减负荷率;最后,以IEEE 10机39节点系统为例,分析了失去大功率电源后受端系统的减负荷协调优化控制。结果表明,与常见的最小经济代价及等切负荷率控制方案相比,协调优化控制不仅经济代价较小,且事故评级相对均衡,具有较好的综合性能。
关键词(KeyWords): 减负荷;事故评级;增广潮流计算;协调优化控制;改进粒子群算法
基金项目(Foundation): 国家电网公司科技项目资助(SGJS0000DKJS1501031)~~
作者(Author): 陈庆;周海强;朱斌;苏大威;钱礼明;鞠平;徐春雷;张琦兵;
Email:
DOI: 10.13335/j.1000-3673.pst.2016.04.010
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