基于RTDS的快速投切电容器自动装置投切策略研究

为了充分利用系统备用无功资源来提高电网受端动态无功补偿能力,较好地提高电压稳定性,文中基于快速投切电容器自动装置提出了投切电容器的控制策略。投切控制策略设置有系统故障识别逻辑、低压投入电容器逻辑和过压切除电容器逻辑。仿真平台采用数字实时仿真(RTDS)搭建了220 kV及以上系统实时仿真模型,分别连接实际直流控制保护装置与快速投切电容器自动装置,构成了双闭环实时仿真系统。通过设置多种试验项目,开展了不同故障工况下自动装置基本投切策略的试验研究,检验了投切策略的正确性和有效性,为装置的工程实施与应用提供了重要的技术指导。

Switching strategy of fast-switching capacitor automatic device based on closed-loop real-time simulation

In order to make full use of the reserve reactive power resources to improve the dynamic reactive power compensation capability of the receiving end of the power grid and improve the voltage stability better, this paper proposes the control strategy of the switching capacitor based on the automatic switching capacitor automatic device. The switching control strategy includes fault identification logic, low-voltage switching capacitor logic and over-voltage switching capacitor logic. The simulation platform builds a real-time simulation model of 220 kV and above based on RTDS, and connects DC protection devices and fast-switching capacitor automatic devices respectively, to form a double closed-loop real-time simulation system. By setting up a variety of test projects, an experimental study of basic switching strategies for automatic devices under different fault conditions is carried out to check the correctness and effectiveness of the switching strategy, which provides important technical guidance for the implementation and application of the device.