韶关变电站二次系统防雷研究

Research of Lightning Protection for Secondary System of Shaoguan Substation

分析和研究了雷电对变电站机房干扰的原因,并结合在韶关地区部分变电站现场调研的现状,指出了当地变电站机房防雷存在的不足:当地的机房电源防雷器和机房信号防雷器大都未加装;同时,等电位连接方式不当,用于接地的铜缆过长也是造成微机系统损坏的重要原因。然后根据现场调研的情况提出了相应的改造措施:加装电源防雷器和信号防雷器,对机房的微机系统进行S型等电位连接,减小电位差等。并使用ATP软件对接地方式经行了仿真,验证了使用S型接地方式的有效性。

The cause of lightning interference on substation room are analyzed and studied, and the deficiency that locality there exists in transformer substation room lightning protection is pointed out combining with current situation surveying in Shaoguan city： the local machine room power source lightning protection and signal lightning protection have not added mostly; meanwhile, the equipotential bonding mode is improper, the grounding copper cable being excessively long is also a important cause of the microcomputer system failure. And then based on the field investigation, corresponding modifi- cation measures are proposed： installation of lightning protection and signal lightning protection, S-type equipotential connection on the room＇ s computer system, reducing the potential difference, etc. And grounding grounding Key grounding method is simulated by using the ATP software, and the effectiveness of using S-type method is verified.