一种新的特高压断路器合成试验回路

特高压断路器试验方法的研究是特高压输电工程发展的基础。该文根据合成试验回路的基本原理，提出了一种新的适用于特高压断路器大容量试验的新型合成试验回路。给出了该试验回路的详细拓扑结构，介绍了回路的工作原理。根据描述开断电弧特性的麦依尔(Mayr)方程，建立参数化的PSCAD电弧电阻模型。在此基础上，对回路的开断试验过程进行仿真，得到了T100试验时的电流电压波形。对暂态恢复电压、电流过零前的变化率等进行分析，并与ABB的增强型并联引入回路(EPIC回路)和IEC试验标准进行比较。结果表明，该回路可以满足特高压断路器的开断试验要求，并具有足够高的试验等价性。

A New Synthetic Test Circuit for UHV Circuit Breakers

Research of test circuit for UHV circuit breakers is important for the development of UHV transmission technology. According to the synthetic test principle, a new synthetic test circuit was proposed. The detailed topology of this test circuit was depicted, and the principle of this circuit during interrupting process was described. Based on the Mayr arc equation, an arc resistance model used in PSCAD simulation was fabricated. The interrupting test using the proposed circuit under T100 mode was simulated. The current and voltage waveforms during test were obtained. The di/dt at the current zero point and the transient recovery voltage (TRV) after arc quench were analyzed. Comparison of this test circuit with enhanced parallel injection circuit (EPIC) proposed by ABB and International Electrotechnical Commission (IEC) standard was carried out. The results show that this synthetic test circuit is able to meet the requirements of UHV circuit breaker test, and has high enough equivalence.