变压器相间短路后备保护中负序阻抗继电器的应用研究

Study on Application of Negative Sequence Impedance Relay in Short Circuit Backup Protection of Transformer

随着我国经济的不断发展,社会各界对电能的需求量不断增长,对新时期的供电安全提出了更高要求。在变电器相间短路后备保护中,常规的偏移特性阻抗继电器应用局限性较大,可靠性和灵敏性难以满足实际需求。负序阻抗继电器的出现,以其独特的优势在变压器相间短路后备保护中得到了广泛应用。因此,对负序阻抗继电器在变压器相间短路后备保护中的实际应用进行详细的技术分析,旨在充分发挥负序阻抗继电器的优势,保证电力系统的安全、稳定运行。

With the continuous development of our country's economy,the demand for electric energy from all walks of life has been increasing,and higher requirements have been put forward for the security of power supply in the new period.The conventional impedance relay with offset characteristics is limited and its reliability and sensitivity are difficult to meet the actual demand in the backup protection of the converter.The emergence of the negative sequence impedance relay has been widely used in the backup protection of the Transformer with its unique advantages.In this paper,the practical application of negative sequence impedance relay in Transformer short-circuit backup protection is analyzed in detail,in order to make full use of the advantages of negative sequence impedance relay,and ensure the safe and stable operation of power system.