电网安全稳定控制装置线路故障跳闸判据的改进

摘要

安全稳定控制用故障跳闸判据已经在各级电网的安全稳定控制装置中得到了广泛应用，其动作的准确性依靠继电保护装置的跳闸信号。近年来，随着继电保护装置速动性指标的提升，安全稳定控制装置不能准确识别输电线路故障类型事件时有发生。基于现场发生的相间故障实例分析，提出安全稳定控制用故障跳闸判据的改进方法。利用RTDS实时数据仿真系统通过 FWK-300型安全稳定控制装置对改进后故障跳闸判据的正确性、可靠性和有效性进行了验证。实验结果表明：改进后故障跳闸判据正确、可靠、有效。%Line fault trip criterion has been widely used in power system security and stability control equipment. The equipments have also been widely used in all levels of power grid. Whether the criterion is right or not, it relies on the relay protection device’s tripping signal. In recent years, as the relay protection device acts faster and faster, the power system security and stability control equipment sometimes can’t identify the kind of fault correctly. Based on an example of phase-to-phase fault which occurred in site, we propose an improved method of the fault-trip criterion which can be used in security and stability control system, the use of FWK-300 Stability Control Device validates the correctness, reliability and effectiveness of the new method by RTDS test. Results of the tests show that the improved method is correct,reliable and effective.