基于负荷无功电压响应的切负荷控制决策优化  

Load shedding scheme optimization based on load voltage and reactive power

作　　者：李晔[1] 张保会[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《电力自动化设备》2015年第6期106-111,共6页Electric Power Automation Equipment

摘　　要：基于感应电动机一阶模型,推导了计及节点负荷无功变化和电压偏移程度的切负荷量分配指标。该指标从物理意义上相当于节点负荷等效电纳的变化量,其大小能反映节点负荷中感应电动机所占比例和不同负荷模型对暂态电压稳定性的影响程度。利用该指标分配各节点的切负荷量,提出了综合考虑系统频率、负荷电压及无功响应的自适应减载方案。IEEE 39节点系统的仿真结果表明,所提出方案较经典自适应控制方案更有利于保障系统在大扰动后的电压稳定性和频率稳定性。An index of shedding load allocation considering the reactive power variation and voltage deviation of nodal load is deduced based on the first-order model of induction motor,which denotes physically the equivalent suseeptance change of nodal load,reflecting the proportion of induction motor in the nodal load and the influence of load model on the transient voltage stability. It is used to allocate the shedding load to each node and an adaptive load shedding scheme considering the system frequency,load voltage and reactive power response is proposed. The simulative results of IEEE 39-bus system show that, compared with the classical adaptive load shedding scheme,the proposed scheme can better guarantee the voltage and frequency stability of power system after big disturbance.

关 键 词：电力系统 暂态电压稳定性 频率稳定性 自适应控制 切负荷 稳定性 

分 类 号：TM72[电气工程—电力系统及自动化]