10 kV零压降零损耗深度限流装置的设计与应用

Design and Application of a 10 kV Depth Current Limiting Device with Zero Voltage Drop and Zero Loss

为解决10 k V母线短路电流超标不能并列运行和加装限流电抗器带来的压降及损耗难题,研究了一种零压降零损耗深度限流装置,分析了其工作原理,介绍了控制系统的总体构成,并提出分相控制器的具体设计方案.采用了故障电流快速检测技术、高速真空开关快速换流技术,并结合高能氧化锌均能限压技术和智能相控技术,实现了在正常状态下零损耗、零压降,近区短路故障状态下限制短路电流的目的.通过在220 k V变电站10 k V侧的应用,验证了零压降零损耗深度限流装置在限制短路电流中的作用.

To solve the problem that the 10 k V bus can’t run in parallel when the short-circuit current exceeds,and the voltage drop and loss caused by the current limiting reactor,the research focuses on the design and application of a depth current limiting device with zero voltage drop and zero loss. The working principle is analyzed and the structure of the control system is introduced. Based on the analysis,a detailed scheme of the split phase controller is proposed. The device adopts rapid detection of fault current,and rapid converter technology based on high-speed vacuum switch. And it is also combined with voltage limiting technology with high-energy zinc oxide and intelligence phase control technology. It can achieve the purpose that there has zero loss,and zero voltage drop in the normal state,and the purpose limiting the short circuit current in the fault state. The depth current limiting device is used in the project of 220 k V substation,where the device is installed on the 10 kV side. The experiments showthat the 10 k V depth current limiting device with zero voltage drop and zero loss have good effect on the limiting of short circuit current.