Networked protection system and method for railway power distribution system
A technology of power distribution system and protection system, applied in the protection of overcurrent response, emergency protection circuit devices, electrical components, etc. It can reduce the difficulty of operation and maintenance, realize intelligent monitoring, and improve reliability.
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Embodiment 1
[0038] Such as figure 1 As shown, a networked protection system of a railway power distribution system of the present invention includes a railway power distribution system and a railway power distribution protection system. The railway power distribution system includes two incoming lines as power sources and six bus bars. The two bus bars in the bus bar are the No. 1 bus bar and the No. 2 bus bar. The No. 1 bus bar and the No. 2 bus bar are bus-coupled and connected to the two incoming wires respectively. The No. 1 bus bar and the No. 2 bus bar are also connected to the feeder and the capacitor respectively. Connected to a voltage regulator, the voltage regulator is also connected to the remaining four bus bars, the remaining four bus bars are No. 3 to No. 6 bus bars and are respectively connected to the through lines, the railway power distribution protection system is connected to the six bus bars and The connected feeder lines, capacitors, voltage regulators and through lin...
Embodiment 2
[0047] Such as Figure 3 to 9 As shown, the present invention relates to a networked protection method for a railway power distribution system, including overcurrent protection. Its working process is: when the line fails, the current measured by the microcomputer protection device through its current transformer is greater than the rated load current , The microcomputer protection device trips the circuit breaker based on the current signal to realize over-current protection. The principle block diagram of overcurrent protection is as follows: image 3 As shown, image 3 Among them, Ia, Ib, Ic are the A, B, and C three-phase protection currents of the line respectively; Tdz is the operating time limit of the overcurrent protection.
[0048] As a further optimization of the present invention, such as Figure 4 As shown, on the basis of the above structure, the present invention also adds a low voltage start. Its working process is: when the line fails, the microcomputer bus tie p...
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