基于自适应滤波LMS算法的超高压TCR动态无功补偿调压方案设计与仿真

The extra high voltage regulation scheme of TCR dynamic reactive power compensation based on active filtering LMS algorithm

为了满足保证系统电压稳定、降低高压电网网损的现实要求,系统分析了电压调整的基本原理,经比较后选取晶闸管控制电抗器(TCR)动态无功补偿调压方案。详细地阐述了无功补偿和电压调整过程,特别是引入了最小均方(LMS)自适应滤波算法对基本控制方法进行了改进,此改进方法可提高控制精度,加快收敛速度。还以500 kV超高压300 km长距离输电线路为例,在Matlab中搭建了12脉波接法的TCR调压模型,无功补偿以及调压的效果都验证了TCR作为调压措施的快速性和动态性。

In order to ensure the voltage stability of system and reduce the high-voltage network loss, improve power quality, a scheme of compensating reactive power is proposed in this paper. Firstly, the basic principle of voltage reg- ulation is introduced. After making comparison with several control methods, thyristor controlled reactor （TCR） com- pensator is selected due to its certain feasibility and stability. Besides, the reactive power compensation and voltage regulation process are elaborated in detail, and the improving control strategy is performed based on the least mean square （LMS） algorithm, which makes it vital in accelerating convergence rate and enhancing control accuracy. At last, a 500 kV extra high voltage and 300 km long-distance transmission line model are built with 12-pulse connection structure of TCR. The Matlab simulation results verify the theoretical analysis and provide with super advantages in ac- celerating dynamic response.