基于RTDS的SVC控制系统数字仿真研究

Research on Control System of SVC and Its Digital Simulation Based on RTDS

研究静止无功补偿控制系统,运用实时数字仿真工具建立特例仿真试验模型,对该控制系统的可行性以实例验证。利用RTDS综合仿真试验平台,构建230 kV变电站仿真模型。模型中,利用晶闸管投切电容器TCR和晶闸管控制电抗器TSC组成静止无功补偿装置。该装置的控制系统可以实现对电力系统电压进行采样,监视电力系统等效导纳的变化趋势,建立电力系统导纳和TCR点火角的关系,通过调节点火角来限制电力系统变化趋势的扩大。仿真结果表明该静止无功补偿控制系统可以稳定电力系统电压并实现功率因数的实时调节。

The control system of static var compensator was studied. By using real-time digital simulation （RTDS） tool, a special simulation model case was established, and the feasibility of the control system with a case was validated. A simulation model of 230kV substation was constructed with application of RTDS integrated simulation platform. The static var compensator was constituted by thyristor controlled reactor and thyristor switched capacitor in this model. The control system of this equipment is to monitor the variation trend of power system equivalent admittance with sampling the power system voltage, establish the relationships between power system admittance and the firing angle of TCR, adjust the firing angle to limit the expansion of power system variation trend. The simulation results demonstrate that the control system of static var compensator can guarantee power system stability and real-time adjust power factor.