特高压交流输电系统无功与电压的最优控制策略  

An Optimal Control Strategy of Reactive Power and Voltage for UHVAC Power Transmission System

作　　者：熊虎[1] 向铁元[1] 詹昕[1] 宋旭东[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电网技术》2012年第3期34-39,共6页Power System Technology

基　　金：武汉大学博士自主科研基金(20102070101000068)的资助

摘　　要：特高压输电是我国电网发展的必然选择,无功电压控制是特高压关注的研究课题。定义了穿越无功,分析了分布参数下长线路充电功率、无功损耗、沿线最高电压及其位置,从穿越无功产生的原因深入分析了特高压无功补偿需求、无功补偿量、变压器无功损耗以及低容或低抗投切组数与首末端电压模值比的关系,由此提出了以穿越无功最小为目标的特高压无功和电压最优控制的数学模型,并给出了最优解的数值算法。算例仿真证明最优控制策略和算法有效。It is inevitable for the development of power grid in China to adopt UHV power trasnmission, and the control of votlage and reactive power are the research topics that the researchers of UHV power transmission pay special attention to. In this paper, the definition of traversing reactive power is given and the energizing power of long tansmission line, the loss of reactive power, the highest voflage alone the line and the position where it appears are analyzed; based on the reason by which the traversing reactive power occurs, the relation between modulus value ratio of sending terminal voltage to receiving terminal voltage and traversing reactive power composed of three parts, i.e., the demand of compensation for reactive power, the amount of reactive power compensation, loss of reactive power of power transformers and the switching on/off number of shunt low voltage capacittor banks or shunt low voltage reactors are analyzed in detail, herefrom a mathematical model for optimal control of reactive power and voltage of UHV power transmission, in which the minimum traversing reactive power is taken as objective, is built, and the numerical algorithm for the optimal solution of this model is given. Smulation results show that both the proposed optimal control strategy and algorithm are effective.

关 键 词：特高压输电 无功补偿 电压控制 最优策略 

分 类 号：TM76[电气工程—电力系统及自动化]