论文部分内容阅读
针对东莞站无功补偿及提高电压稳定性的需求,给出了基于IEGT器件的35 kV±200 Mvar STATCOM装置的总体设计,提出了双三角接链式结构的主电路,避免了开关器件的并联与串联。同时,针对存在2个积分环节的锁相环无法快速检测系统电压相位跳变的缺点,提出了一种只有单个积分环节的新型锁相环;根据电网对STATCOM的多目标要求,设计了根据电网状态识别控制目标的多目标协调控制策略。以东莞站实际电网为背景对STATCOM的控制策略及效果进行了仿真,结果表明STATCOM装置在短路后能够快速输出无功功率,有效提高220 kV母线电压,可满足稳态与暂态条件下系统运行的要求。
Aiming at the demand of reactive power compensation and voltage stability in Dongguan station, the overall design of 35 kV ± 200 Mvar STATCOM device based on IEGT device is given. The main circuit of double delta-connected chain structure is proposed, which avoids the parallel connection of switching devices And in series. At the same time, aiming at the shortcomings that the phase-locked loop with two integration points can not quickly detect the phase-to-phase transition of the system voltage, a new type of phase-locked loop with single integration is proposed. According to multi-objective requirements of STATCOM, Multiobjective Coordinated Control Strategy for State Identification Control Objectives. The control strategy and effect of STATCOM are simulated based on the actual grid in Dongguan Station. The results show that STATCOM can output reactive power rapidly after short circuit, effectively raise the voltage of 220 kV bus, and can meet the system operation under steady state and transient state Request.