Voltage-peak synchronous closing control for shunt capacitors

Abstract

The paper presents a new synchronous closing control, the voltage-peak closing method, to reduce shunt capacitor inrush currents andovervoltages. Switch timing and precharged voltages for energising a single capacitor bank, a back-to-back capacitor bank and a three-phase capacitor bank are presented. The effects of switch-closing speed and timing deviation are discussed. Two examples are illustrated to show the excellent performance.

Solid‐state transient limiter for capacitor bank switching transients

“…Pre‐insertion resistor/inductor is another approach, suggested in [5, 6]. Zero‐voltage switching of the switch contacts [7, 8] and power electronic control‐based techniques [9–12] are other alternatives. These approaches require an additional control circuit, which leads to an increase in the cost and complexity.…”