机场供电系统无功功率补偿方案研究  

Study on Reactive Power Compensation Scheme of Power Supply System for Airport

作　　者：李月英 宋长健 王守志 LI Yueying;SONG Changjian;WANG Shouzhi(Tianjin Sino-German University of Applied Sciences,Tianjin 300350,Chin)

机构地区：[1]天津中德应用技术大学航空航天学院,天津300350

出　　处：《电力电容器与无功补偿》2018年第4期30-35,88,共7页Power Capacitor & Reactive Power Compensation

基　　金：国家自然科学基金项目(51207056)

摘　　要：机场用电系统产生大量无功功率影响用电安全,本文分析了机场无功功率产生的机理并对其进行了电路模型和功率因数分析,建立了SVG标幺值数值计算模型。在Matalab/Simulink环境下搭建了每相5H桥的级联系统,采用移相载波控制与单倍频调制相结合的控制策略,设计了相内电压和相间电压平衡器,并通过微调三相调制波的相位来实现相间电压的平衡。分别仿真了系统的静态效应和动态效应,系统能实现无功补偿和谐波抑制,功率因数提高到0.98,补偿精度较好,没有出现过补和欠补,达到了满意的无功补偿和谐波抑制效果。Power system for the airport generates a large number of reactive power and affects power safety.In this paper,the generation mechanism of reactive power in the airport is analyzed,its circuit model and power factor are analyzed so to set up the calculation model of SVG nominal value. In the Matalab/Simulink environment,a cascade system with each 5 H-bridge per phase is constructed. The control strategy with combination of phase-shifted carrier control with single-frequency modulation control is adopted to design the in-phase voltage and inter-phase voltage balancer to achieve inter-phase voltage balance by way of fine tuning the phase of three-phase modulation wave. Both the static and dynamic effect of the system is simulated respectively and the system can achieve reactive power compensation and harmonic suppression.The power factor is improved up to 0.98 with good compensation accuracy and without over compensation and under compensation and the satisfactory reactive power compensation and harmonic suppression result are reached.

关 键 词：无功功率 静止无功发生器(SVG) 移相载波控制 无功补偿 

分 类 号：TM714.3[电气工程—电力系统及自动化]