低频减载综合代价最优化算法  

An Optimal Algorithm of Comprehensive Cost for Under-Frequency Load-Shedding

作　　者：和敬涵[1] 柏丹丹[1] 王小君[1] 叶豪东 

机构地区：[1]北京交通大学电气工程学院,北京市海淀区100044

出　　处：《电网技术》2013年第12期3461-3466,共6页Power System Technology

基　　金：国家自然科学基金项目(51277009)~~

摘　　要：引入单位负荷切除因子来定量表征不同切负荷节点的负荷重要性、单位电能停电损失、负载率和负荷频率调节效应系数的差异对切负荷动作效果的影响,基于层次分析法求解单位负荷切除因子的数值大小,并将其作为负荷节点切负荷容量的权值。计及各切负荷点的容量约束、系统切负荷总量的限制和系统稳态频率约束,提出一种低频减载综合代价最优模型,并采用粒子群优化算法求解该多约束优化问题。仿真算例结果表明所提算法相对于传统低频减载算法表现更佳,初步论证了模型和算法的可行性和有效性。A unit load-shedding factor is led in to quantitatively characterize the impacts of load importance at different load-shedding points, outage cost of per unit electric energy, load rate and the difference between coefficients of load-frequency regulation effects on load-shedding effect. Based on analytical hierarchy process （AHP） the numerical value of per unit load-shedding factor is solved and taken as the weight of load-shedding capacity at load bus. Considering the capacity constraints at load-shedding points, the limitation of total load-shedding amount and the system frequency constraint under steady state, an optimal model of comprehensive cost for under-frequency load-shedding （UFLS） is proposed, and particle swarm optimization algorithm is used to solve the proposed problem with multi-constraints. Simulation results show that relative to traditional UFLS algorithm, better load-shedding effects can be achieved by using the proposed optimal algorithm, thus the feasibility and effectiveness of the proposed model and algorithm are preliminarily demonstrated.

关 键 词：低频减载 单位负荷切除因子 层次分析法 综合代价 粒子群优化算法 

分 类 号：TM712[电气工程—电力系统及自动化]