摘要
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。
The overall design of a 35 kV ±200 Mvar STATCOM system based on IEGT（Injection Enhanced Gate Transistor） is proposed for Dongguan Substation to meet its requirements for reactive power compensation and voltage stability enhancement. A parallel delta topology is adopted to avoid the parallel or serial connection of switching devices. Instead of the conventional phase locked loop with two integration blocks,that with only one integration block is proposed for the fast detection of phase angle jump of bus voltage. A multi-objective coordinated control scheme is designed,which,according to grid state information, detects the objective to meet the requirements of grid for the multiple objectives of STATCOM operation. The control strategy and its effectiveness are simulated based on the network parameters of Dongguan grid, which proves that,the STATCOM system responses quickly to the short circuit fault by outputting reactive power to effectively raise the voltage of 220 kV bus,meeting the requirements of grid operation under both steady-state and transient conditions.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第10期136-142,共7页
Electric Power Automation Equipment
基金
国家科技支撑项目(2007BAA12B02)~~
