基于信号注入法的TSC消弧线圈动态调谐接地装置  

Automatic Tuning TSC Arc Suppression Coil Grounding Device Based on Signal Injection

作　　者：程骏[1] 陈柏超[1] 皇甫成[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072

出　　处：《高压电器》2006年第1期63-65,共3页High Voltage Apparatus

摘　　要：对地电容的测量是谐振接地中的主要难题,提出了一种信号注入的方法,以实现电网对地电容的准确测量。在消弧线圈设置中性点PT作为信号注入PT,从信号注入PT二次侧注入25 Hz的电流,在另一PT开口三角处测量该频率的电压。使用改进后的TSC调容式消弧线圈,以单片机 80C196KC为核心的控制系统,研制出一种自动跟踪补偿装置。现场试验结果证明,该自动跟踪补偿装置具有结构简单、调节速度快、补偿准确度高、谐波危害小,且无机械动作可靠性高等特点。The capacitance to ground is the key difficulty to measure in resonance grounding system. In this paper, a method of signal injection is proposed to measure capacitance to ground accurately, Neutral-point PT is set up as signal injection PT in arc suppression coil, a 25 Hz current is injected form the secondary of the PT. The voltage of this frequency is measured in the terminals of another PT. Using improved TSC arc-suppression coil, which control system is designed based on microprocessor 80C196KC, the automatic tracing and compensation device is developed. It is proved by the test that this device has many advantages such as simple structure; quick-adjusting; high accuracy compensation; less harmonic and high reliability without mechanical mistake.

关 键 词：消弧线圈 晶闸管投切电容 信号注入 对地电容 

分 类 号：TM864[电气工程—高电压与绝缘技术]