摘要
电力系统中的过电压通常叠加在正常运行的工频电压上,为了模拟电力系统中出现的实际过电压,研制了一套相位可控的工频与冲击协同作用的试验装置。本装置采用耦合电容连接工频电压产生电路与冲击电压发生器,实现冲击电压与工频电压的叠加;使用自动点火装置实现冲击电压叠加到工频电压的相位可控。对本装置的原理进行分析,并利用ATP-EMTP进行电路仿真,仿真结果表明：耦合电容值的大小影响作用于被试品上的工频电压和冲击电压的波形和效率。实测结果表明：该装置的硬件延迟时间为1.4 ms,工频与冲击电压的叠加相位可控,叠加波形与系统实测过电压波形类似,能够较好地模拟实际过电压。
Overvoltage of distribution network is usually superimposed on the power frequency voltage,therefore, to simulate the actual overvoltage situation in the electrical power system, a test device of controllable phase for synergy of the power frequency voltage and the impulse voltage was designed. The coupling capacitor between the power frequency voltage generating circuit and impulse voltage generator can make the impulse voltage to superimpose on the power frequency voltage, and the automatic ignition device can control the phase of the power frequency voltage superimposed the impulse voltage. Moreover, the circuit principle of the device was analyzed and was simulated by using the ATP-EMTP software.The simulation results show that coupling capacitance value will affect the power frequency voltage and impulse voltage waveforms and efficiency. The experimental results show that the hardware delay time of the device is 1.4 ms, the superimposed phase of the power frequency voltage and the impulse voltage is controllable, and the superimposed waveforms are similar to the measured overvoltage waveforms which can simulate the actual overvoltage.
作者
周凯
何珉
熊庆
刘凤莲
李巍巍
ZHOU Kai1, HE Min1, XIONG Qing2, LIU Fenglian3, LI Weiwei3(1. School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China; 2. State Key Laboratory of Elec- trical Insulation and Power Equipment, Xi＇an Jiaotong University, Xi＇an 710049, China; 3. Electric Power Research Institute of State Grid Sichuan Electric Power Company, Chengdu 610072, Chin)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2018年第3期750-755,共6页
High Voltage Engineering
基金
国家自然科学基金(51477106)
中国博士后科学基金(2015T80976)~~
