有利于多馈入系统恢复的自适应变结构VDCOL控制  

Adaptive Variable Structure VDCOL Control Strategy for Coordinated Recovery of MIDC System

作　　者：胡松伶 王渝红[1] 李兴源[1] 

机构地区：[1]四川大学电气信息学院,成都610065

出　　处：《高压电器》2016年第5期90-95,共6页High Voltage Apparatus

基　　金：国家高技术研究发展计划(863计划)项目(2011AA05A119)~~

摘　　要：针对多馈入直流系统故障后难以快速恢复的问题,提出了一种基于模糊理论,并融合多馈入直流特性的自适应变结构VDCOL控制策略。该控制方法将模糊控制的非线性特性与VDCOL控制机理有效结合,同时将多条直流自身的强度和相互作用考虑在内,根据电压大小及其恢复水平对直流电流进行动态控制,协调系统的电压和功率恢复。仿真结果表明:该控制方法能够有效控制恢复期间的无功需求,抑制后续换相失败发生,加快系统的恢复,保证系统的安全稳定运行。An adaptive variable structure VDCOL control strategy considering the characteristics of MIDC system based on fuzzy theory is proposed to improve the recovery performance of multi-infeed HVDC system after disturbance. This control combines nonlinear characteristics of fuzzy control with basical mechanism of VDCOL control effectively, and takes the own strength and interactions of multiple DC lines into account, which ensures each current order of MIDC system adjusted dynamically according to system voltage variation and recoveries voltage and power coordinately. The simulation results show that this method can decrease the reactive power demanded inhibit the follow-up commutation failures to accelerate the recovery and ensure the safe and stable of MIDC system.

关 键 词：多馈入直流 多馈入短路比 模糊控制 自适应变结构VDCOL 协调恢复 

分 类 号：TM721.1[电气工程—电力系统及自动化]