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DC solid state circuit breaker with bidirectional breaking and soft start functions and control method

A solid-state circuit breaker and soft start technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of high cost and achieve the effects of avoiding the expansion of faults, reducing the difficulty of control, and reducing the possibility of misoperation

Active Publication Date: 2022-05-10
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

In addition, the existing topologies of solid-state circuit breakers with multiple functional integrations all rely on specific devices, such as wide-bandgap semiconductor devices, which are expensive and can only be used in low-voltage, low-current situations. The use of devices needs to be expanded

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  • DC solid state circuit breaker with bidirectional breaking and soft start functions and control method
  • DC solid state circuit breaker with bidirectional breaking and soft start functions and control method
  • DC solid state circuit breaker with bidirectional breaking and soft start functions and control method

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[0060] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, not to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

[0061] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0062] A DC solid-state circuit breaker with bidirectional breaking and soft-start functions according to the present invention, the DC solid-state circuit breaker includes the following modules:

[0063] Line current detection and controller, used to detect the circuit status of th...

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Abstract

The invention belongs to the field of DC solid-state circuit breakers, and specifically relates to a DC solid-state circuit breaker with bidirectional breaking and soft-start functions and a control method, aiming to solve how to realize the DC load softness of the DC solid-state circuit breaker in medium and low-voltage breaking occasions. Starting and reliable breaking of bidirectional fault currents. The invention includes: detecting the circuit state of the DC solid-state circuit breaker, and generating a corresponding switch on-off drive signal according to the line state and a line current detection and controller; driving the main flow branch switch S according to the switch on-off drive signal m , energy-absorbing through-flow branch switch S 1 , energy-absorbing through-flow branch switch S 2 and energy absorbing branch switch S 3 The on-off driver of the switch to realize the system steady state, fault transient state and soft start transient control; the energy-absorbing branch absorbs the fault current in the corresponding state. The invention realizes the reliable breaking of the bidirectional fault current of the DC solid-state circuit breaker in the middle and low voltage breaking occasions and the soft start when the capacitive load is connected.

Description

technical field [0001] The invention belongs to the field of DC solid-state circuit breakers, and in particular relates to a DC solid-state circuit breaker with bidirectional breaking and soft-start functions and a control method. Background technique [0002] In recent years, with the continuous development of renewable energy technology, connecting large-scale distributed generation (Distribution Generations, DGs) to the power grid is a major trend in the future power grid development, and is becoming a research hotspot for scholars at home and abroad. For the direct current transmission system, its advantages such as long transmission distance, large transmission energy, and small loss are combined with the power supply flexibility of distributed generation, and the formed multi-terminal direct current transmission system (MVDC) has the advantages of multi-power supply, multi-drop The unique advantage of point power receiving. But in the same way, after improving the pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26
CPCH02H7/268
Inventor 朱晋曾庆鹏韦统振霍群海尹靖元
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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