The invention discloses a traction network power supply arm relay protection method based on a directional impedance element. A pavilion of the traction network is connected to a power supply arm through a circuit breaker, and the circuit breaker is provided with a feeder protection device; the feeder protection device comprises a directional impedance element and further forms a protection unit; after the directional impedance element of the feeder protection device is started, the circuit breaker corresponding to the feeder protection device is tripped off, and an inter-tripping signal or locking signal is sent to the feeder protection device of the same group of protection units; the feeder protection device trips off a corresponding circuit breaker after receiving the inter-tripping signal, and locks protection after receiving the locking signal; and the starting condition of the directional impedance element is set according to the full length of the power supply arm. The protection method has the beneficial effects that the overall length of the power supply arm can be independently protected; the defect in the protection range is overcome through inter-tripping signals, the defect in selectivity is overcome through blocking signals, and overall protection of the power supply arm is formed; and the fault power supply arm can be quickly isolated after the fault, and the power supply of the non-fault side power supply arm is not interrupted.
本发明公开了一种基于方向阻抗元件的牵引网供电臂继电保护方法。牵引网的所亭通过断路器连接到供电臂,断路器配置馈线保护装置;馈线保护装置包括方向阻抗元件,馈线保护装置还构成保护单元;馈线保护装置的方向阻抗元件启动后跳开馈线保护装置对应的断路器并向同组保护单元的馈线保护装置发送联跳信号或闭锁信号;馈线保护装置收到联跳信号后跳开对应的断路器,收到闭锁信号后闭锁保护;方向阻抗元件的启动条件按照供电臂全长整定。本发明的有益效果在于,能单独保护供电臂全长;通过联跳信号弥补保护范围的不足、通过闭锁信号弥补选择性的不足,构成对供电臂的整体保护;能在故障后快速隔离故障供电臂,且不中断非故障侧供电臂的供电。
Traction network power supply arm relay protection method based on directional impedance element
一种基于方向阻抗元件的牵引网供电臂继电保护方法
2021-06-25
Patent
Elektronische Ressource
Chinesisch
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