基于电容串联式的新型振荡波测试系统的研究

传统直流激励式振荡波容易对电缆形成空间电荷。为解决直流加压对电缆造成损伤这一隐患,提出一种新的振荡波电源结构,分析了电容串联式振荡波电路的加压过程然后利用Multisim软件进行仿真并结合仿真数据,确定其理论的可行性。以实验室10 k V交联聚乙烯电缆为研究对象,设计电容串联式振荡波实验平台并开展新型振荡波局部放电实验,进一步结合仿真与实验数据验证电压波形的正确性以及与传统加压方式的等效性。实验结果表明,新型振荡波电路能够有效避免电缆在测试过程中产生空间电荷,能有效检测出电缆中缺陷的局部放电,可以替代传统的振荡波测试方法。

Study on a New Type of Oscillating Wave Measurement System based on Capacitance Series

Conventional DC excited oscillating wave is easy to form space charge on cable. In order to solve the hidden danger of cable damage caused by dc compression, a new structure of oscillating wave power supply is proposed. The compression process of capacitor serially connected oscillating wave circuit is analyzed, and then the Multisim software is used to simulate and combine the simulation data to determine the feasibility of its theory. Taking the 10kV cross-linked polyethylene cable in the laboratory as the research object, a capacitive serially connected oscillating wave experimental platform was designed and a new type of oscillating wave partial discharge experiment was carried out. The experimental results show that the new oscillating wave circuit can effectively avoid the space charge generated by the cable in the test process, and can effectively detect the partial discharge of defects in the cable, and can replace the traditional oscillating wave test method.