一种高压开关选相控制器设计

Design of Controled Switch Device for High-Voltage Switch

摘要:

变电站通过选相控制器解决投切空载线路、电容器组或电抗器等设备时易产生过电压及涌流的问题；高压开关由于结构复杂,机械特性易受外部环境影响,动作时间稳定性较差,选相控制精度较低；为解决该问题,研制了一种基于ARM+FPGA双核架构的选相控制器,能够接入多种外部传感器对开关动作时间进行预测修正,进而保证选相控制精度；搭建550kV高压开关选相控制试验系统对装置功能进行了验证,结果表明,系统能够控制开关在预设相位完成动作,可靠性高,能够满足工程需求。

Abstract:

When switching no-load lines, capacitor banks, or reactors in substations, overvoltage and inrush currents can easily occur, causing impacts on the power grid system and power equipment. In severe cases, it may even cause damage to equipment components; A phase selection controller based on ARM+FPGA dual core architecture has been developed for this purpose. The device uses solid-state relays for command output to ensure its own accuracy; At the same time, in order to address the complex structure of high-voltage switches, the mechanical characteristics are easily affected by external environments, and the stability of action time is poor, the device also provides various external sensor interfaces, which can predict and correct the switch action time through compensation algorithms, thereby ensuring system accuracy; The 550kV high-voltage switch controled switch test platform was built to verify the device function. The results showed that the system can control the switch to complete the action in the preset phase, with a phase selection deviation of no more than 0.6ms, which can meet the engineering requirements.