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ZERO-CURRENT ZERO-VOLTAGE SWITCHING FORON-LOAD TAP CHANGERS

机译:零电流零电压切换前置载载变频器

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We present a new on-load tap changer (OLTC) design that provides the traditional advantages of the semiconductor-assisted OLTC over the classic, mechanical OLTC. The design provides zero-current, zero-voltage operation of both diverter switches at all times, eliminating contact wear due to arcing. The design of the diverter sub-circuit is discussed, including the introduction of a voltage source and corresponding control loop that provides the necessary shunt current or voltage to create the desired zero conditions in the diverter switches. The design differs from existing semiconductor-assisted OLTC systems by the fact that the semiconductor portion of the system is connected in a purely shunt configuration to the main current path. Under normal conditions the load current flows only in the selector and diverter switches making the system very low loss.
机译:我们提出了一种新的载载分接开关(OLTC)设计,提供了半导体辅助OLTC在经典的机械OLTC上的传统优势。该设计始终提供两个转向器开关的零电流,零电压操作,消除了由于电弧引起的接触磨损。讨论了转向子电路的设计,包括引入电压源和相应的控制回路,该控制回路提供必要的分流电流或电压,以在转向器开关中产生所需的零条件。该设计与现有的半导体辅助OLTC系统的不同之所以通过系统的半导体部分以纯粹的分流配置连接到主电流路径。在正常情况下,负载电流仅在选择器和转向器开关中流动,使系统变得非常低。

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