220 kV线路-变压器组的保护特点探讨

Study on relay protection of 220 kV line-transformer unit

湛江奥里油电厂的高压厂用备用电源采用220 kV线路-变压器组的独特结构方式,在广东省内是独一无二的。由于线路与变压器之间无断路器,其保护与常规线路保护或变压器保护相比有独特之处。为此,结合湛江奥里油电厂的工程实践,对该类型线路-变压器组的保护特点进行了探讨。

220 kV line-transformer unit is used for HV auxiliary standby power source in Zhanjiang Orimulsion-fired power plant, which is unique in Guangdong. China. As there are not any circuit-breakers between the line and the transformer, the relay protection of such structure is distinct from convcntional line or transformer protection. This paper introduces and analyzes the protection of 220 kV line-transformcr unit according to the actual situation of Zhanjiang Orimulsion-fired power plant.