A high-speed three-phase soft circuit breaker control device and method
A technology for control devices and circuit breakers, applied in electrical components, pulse technology, electronic switches, etc., can solve the problems of low reliability and low robustness, avoid phase angle loss, suppress arc generation and temporary operation. The effect of state overvoltage
Active Publication Date: 2020-05-29
GUANGXI UNIV
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Problems solved by technology
[0005] The invention provides a high-speed three-phase soft circuit breaker control device and method, which solves the problems of low robustness and low reliability of the existing circuit breaker zero-crossing phase-locked control method
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[0027] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0028] A high-speed three-phase soft circuit breaker control device, such as figure 1 As shown, the device is connected in series between the AC power source 1 and the load 2. The AC power source 1 is a three-phase AC power, and the load 2 is any load that requires a circuit breaker. The device specifically comprises a circuit breaker 3 , a switching element 4 and a controller 5 . The circuit breaker 3 is connected in series between the AC power source 1 and the load 2 , and the opening and closing of the circuit breaker 3 can control the conduction and disconnection of the circuit between the AC power source 1 and the load 2 . The switching element 4 is connected in parallel with the circuit breaker 3 . The controller 5 is connected to the AC power source 1 , the switch element 4 and the circuit breaker 3 respectively.
[002...
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The invention provides a high speed three-phase soft circuit breaker control device and method. The device comprises a circuit breaker, a switch element and a controller. The circuit breaker is connected in series between an AC power supply and a load. The switch element is connected in series and then is connected to the circuit breaker in parallel. The controller is connected to the AC power supply, the switch element and the circuit breaker. The controller comprises a signal collection module, a signal processing module, and a signal control module. The signal collection module collects the three-phase AC signal of the AC power supply. The signal processing module carries out natural coordinate virtual flux calculation of the three-phase AC signal, converts the signals into the a three-phase virtual flux signal, and carries out phase locking on the three-phase virtual flux signal and an AC power supply signal. The signal control module is used for monitoring an AC power supply signal phase angle after phase locking, controlling the switching element to close in advance when the AC power supply signal phase angle is 2kpi, and controlling the circuit breaker to delay closing. According to the device and the method, the switching speed and life of the circuit breaker are improved, the robustness of the system is improved, and the control mode is more reliable.
Description
technical field [0001] The invention relates to the field of circuit breakers, in particular to a control device and method for a high-speed three-phase soft circuit breaker. Background technique [0002] AC circuit breaker is the most widely used AC control switch device in the current modern industrial and agricultural production activities, and has become an indispensable low-voltage electrical equipment in the terminal of low-voltage power supply and distribution network. However, because the structure of the traditional low-voltage circuit breaker is a mechanical switch, its inherent mechanical switch action time is relatively slow compared with the change speed of the alternating current, resulting in the mechanical circuit breaker switching action being too slow. It is easy to generate a strong arc when it is broken. Although the circuit breaker has a corresponding arc extinguishing mechanism, the high current generated by the hard breaking action will still damage t...
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IPC IPC(8): H03K17/16H03K17/567
CPCH03K17/168H03K17/567H03K2217/0009H03K2217/0027
Inventor 卢子广滕开良
Owner GUANGXI UNIV