基于新型电流直接控制策略的SVG仿真研究

摘要

为了提高静止无功发生器(SVG)向电力系统输送无功功率的实时性与精确性,提出了一种基于瞬时无功功率理论id-iq 法的新3W电流直接控制策略.首先分析了瞬时无功功率理论id-iq法的无功电流信号采集运算,在此基础上,建立了SVG数学模型,采用无功电流直接闭环控制策略,应用瞬时无功功率理论的id-iq无功电流检测法实时检测无功电流,提高系统响应速度.然后建立MATLAB仿真电路模型,对实时数据采样、无功电流计算和实时控制等性能测试.通过理论和仿真结果分析,表明本设计方案可行,满足无功功率实时动态快速补偿的要求,提高了系统运行的稳定性.%To improve the real -time performance and accuracy of the SVG, this paper presents a new DC control strategy based on the instantaneous reactive power theory id-iq method. The paper firstly analyzes the id-iq method of the instantaneous reactive-power theory in terms of collection and calculation of the reactive current signal. On this basis, the mathematical model of the SVG is established with the reactive current closed -loop control strategy adopted and the id -iq method used to detect the real time reactive current to improve the system response speed. Then the data sampling, reactive current calculation and real-time control performance etc are tested in the MATALAB simulation circuit. Finally, through theoretical analyses and simulations, it is clearly shown that the design scheme is feasible and meets the requirements for quick real-time reactive power compensation, and helps to improve the stability of the system operation.