Double-bus power supply system and control method

Abstract

The invention discloses a double-bus power supply system and a control method. The double-bus power supply system comprises a first load. The first bidirectional silicon controlled rectifier SCR1, thesecond bidirectional silicon controlled rectifier SCR2, the third bidirectional silicon controlled rectifier SCR3, the first change-over switch K1 and the second change-over switch K2 are respectively connected with the control unit. The first bus L1 and the second bus L2 are respectively connected with a first load and a second load through the third bus L3, and the first bus L1 and the second bus L2 are connected through the third bidirectional silicon controlled rectifier SCR3. The first change-over switch K1 and the second change-over switch K2 are respectively connected with the third bus L3. According to the double-bus power supply system, the SCR1, the SCR2 and the SCR3 are adopted to replace a traditional isolation circuit breaker, and the control unit is arranged, so that a loadtransient interruption event caused in the switching process of the double-bus power supply system can be avoided, and the switching stability and the switching efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of distribution network power distribution, in particular to a double busbar power supply system and a control method. Background technique [0002] The execution of the switching action between traditional dual power sources is generally completed through the closing and closing operations of the isolation circuit breaker. Due to the shortcoming of the isolation circuit breaker itself, the device has a long shutdown time and is related to thermal shutdown. , It is easy to cause short-term power supply to the load, and these problems of short-term power supply are not allowed for the elevator load, which has potential safety hazards. [0003] The traditional double busbar system, such as Figure 10 As shown, there are problems of slow switching speed and long time, which lead to short-term power outages of the load; in addition, the switching method of the traditional dual-bus power supply system fails to so...

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Problems solved by technology

[0002] The execution of the switching action between traditional dual power sources is generally completed through the closing and closing operations of the isolation circuit breaker. Due to the shortcoming of the isolation circuit breaker itself, the device has a long shutdown time and is related to thermal shutdown. , it is easy to cause short-term power supply to the load, and these problems are not allowed for the elevator load, which has potential safety hazards

[0003] The traditional double busbar system, such as Figure 10 As shown, there are problems of slow switching speed and long time, which lead to short-term power outages of the load; in addition, the switching method of the traditional dual-bus power supply system fails to solve the problems of inrush current and voltage drop during the switching process.

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