一种实用中压10kV TSC触发控制电路设计

Design of a Practical Medium Voltage 10 kV TSC Trigger Control Circuit

为了解决中压10 kV可控硅补偿电容器(TSC)装置设计过程中存在的关键技术,即串联可控硅同步触发和触发控制与主电路间的电气隔离问题。采用了1种Buck型恒流源作为触发功率源,以高压电缆和磁环变压器为触发耦合单元,单片机为控制核心,通过控制触发功率源的交直流运行模式,实现10 kV TSC的触发控制。整个设计包括TSC主电路形式的选择、TSC触发控制方案的选择、触发功率源电路设计、触发同步电路设计、驱动控制电路设计,分析了电路的工作原理。达到了整体设计简单、可靠、实用经济的设计目标。

For solving the key technology in the design of medium voltage 10 kV TSC,namely,the electrical isolation issue between synchronous triggering and triggering control of series SCR and main circuit,a kind of Buck constant current source is adopted as trigger power source,using high voltage cables and magnetic ring transformer as the trigger unit,MCU as core for control and the trigger control of 10 kV TSC is achieved by way of controlling the AC and DC operation mode of trigger power source.The whole design is composed of the selection of TSC main circuit,trigger control scheme of TSC,circuit design of trigger power source and triggering synchronization and drive control.The operating principle of circuit is analyzed and such objective as simple,reliable,practical and efficient design is achieved.