换流变保护改造分析及试验技术研究  

Analysis of Converter Transformer Protection Reformation and Research of Testing Technology

作　　者：张佳敏[1] 蒋琛[2] 李鹏[1] 袁宇波[1] 张剑[1] 

机构地区：[1]江苏省电力公司电力科学研究院,江苏南京211103 [2]江苏方天电力技术有限公司,江苏南京211102

出　　处：《江苏电机工程》2013年第2期24-27,共4页Jiangsu Electrical Engineering

摘　　要：高压直流输电系统电压等级高、输电容量大,保护装置不正确动作造成的直流闭锁对电网影响较大,因此,需对现有单一接点出口的换流变电量、非电量保护进行改造,提高直流输电系统的稳定性。与常规交流变压器保护改造不同,换流变保护多集成在极控制保护系统中,改造将涉及到直流控保系统的改造,需对直流控保软件和外部接线进行修改。文中对500 kV政平换流站换流变保护改造需要进行的装置调试和软件修改方法进行了分析,给出了换流变电量、非电量保护改造试验方案。As the high voltage level and huge transmission capacity, the influence of DC block caused by incorrect action of protection equipment is great. The existing electric protection and non-electric protection of converter transformer has only one contact, in order to improve the stability of HVDC （high-voltage direct current）, the protection of converter transformer should be reformed. Different with the AC transformer reformation, the converter transformer protection is integrated in the PPC （pole protection control） system; the reformation of converter transformer protection includes the modification of the DC control and protection program and external wiring. Based on the reformation of converter transformer protection of Zhengping converter station, this paper analyzed the debugging method of protection equipment and the modification method of the program, and gives the scheme for converter protection testing.

关 键 词：换流变保护 保护改造 软件修改 

分 类 号：TM77[电气工程—电力系统及自动化]