摘要
火力发电厂重要辅机采用大容量变频器调速后,电动机的传统保护方式无法实现保护功能。针对该问题,分析了应用高压变频器后对电动机差动保护的影响原因,并结合广东国华台山电厂引风机变频改造的具体情况以及变频工况下差动保护功能的实现提出具体的解决方案,实践证明该方案能够对电动机提供可靠的保护,为发电企业节能减排、安全稳定运行提供技术保障。
Traditional motor protection fails when large-capacity converter is applied to important auxiliary machines in thermal power plant.Correspondingly,the impact of high-voltage converters on motor differential protection is analyzed,and a resolving method of differential protection under converter running condition is provided according to the reform of induced fan converter in Guangdong Guohua Taishan Power Plant.It is verified in practice that the method can provide sound protection for motor and technical support to energy conservation,emission reduction and safe operation of power generation enterprises.
出处
《广东电力》
2010年第8期83-85,共3页
Guangdong Electric Power
关键词
继电保护
高压变频
差动保护
relay protection
high-voltage converter
differential protection
