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Method for turning on/off electro-mechanical integrated high-voltage direct-current circuit breaker

A high-voltage DC, circuit breaker technology, applied in circuit devices, emergency protection circuit devices, and automatic disconnection emergency protection devices, etc., can solve the problem that the reliability and operation of the power grid need to be tested, the protection and control coordination needs to be considered, and the control system Complicated and other problems, to achieve the effect of modular design, easy to complete sets, light weight and reduced size

Inactive Publication Date: 2014-01-22
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is undoubtedly a great progress, but there are still some defects; such as the large number of power electronic components required, and many standby backup components are required from the perspective of safety and reliability; the volume is large, the control system is complicated, the price is expensive, and the protection and control coordination is not yet available. It needs to be considered; the type test items need to be further discussed and determined; especially the reliability and operation of power grids with different topological structures need to be tested.

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  • Method for turning on/off electro-mechanical integrated high-voltage direct-current circuit breaker
  • Method for turning on/off electro-mechanical integrated high-voltage direct-current circuit breaker

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] The invention provides a mechatronic high-voltage DC circuit breaker, which not only has the ability to break the DC short-circuit current in a short time (several milliseconds), and can meet the basic requirements of the DC circuit breaker; it also simplifies the control, integrates detection, triggering, and breaking , isolation function all in one. Compared with ABB's hybrid DC circuit breaker, the power electronic components will be greatly reduced, the volume and cost will also be greatly reduced, and the control will become simpler. In turn, it will open up a new way for the research and development of high-voltage switch products in the future.

[0029] The design concept of the new electromechanical integrated high-voltage DC circuit breaker is different from the existing high-voltage DC circuit breaker, and it has the ability to directly brea...

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Abstract

The invention provides a method for turning on / off an electro-mechanical integrated high-voltage direct-current circuit breaker. The method comprises the following steps: when a short circuit failure occurs at a high-voltage direct-current side and current and a current rise gradient reach corresponding on / off set values, a super-fast mechanical switch is immediately activated to separate contacts in a super-high instantaneous separating speed, a physical clearance is formed, electric arcs are produced, and an on / off command is instantly sent to a power electronic switch; short circuit current is quickly disconnected by the power electronic switch so as to quickly extinguish the electric arcs between the contacts of the super-fast mechanical switch and form an isolation fracture; when the contacts of the super-fast mechanical switch are separated to a final breaking position and the current in a lightning arrester is attenuated to zero, the circuit breaker finishes the whole on / off process, and a high-voltage direct-current power transmission power grid is isolated from the failure circuit. Optimal matching can be carried out in the comprehensive consideration of the cost-to-performance ratios of different elements. The elements can be reduced as far as possible, the size is reduced, the weight is reduced, and the reliability is improved. A novel means is created for the research and development of future high-voltage switch products.

Description

technical field [0001] The invention relates to a breaking method, in particular to a breaking method of an electromechanical integrated high-voltage direct current circuit breaker. Background technique [0002] Reliable and efficient power supply and the exploitation and utilization of renewable resources pose great challenges to improve power transmission modes. Based on the advantages of low loss, long-distance, high-power transmission, more efficient connection of renewable energy into the grid, and flexible operation, high-voltage direct current transmission has received new attention. In particular, the emergence of flexible DC transmission technology based on voltage source converters makes the preparation and development of multi-terminal HVDC grids possible and more and more attractive. A DC circuit breaker with the functions of quickly breaking DC fault current and isolating faults is an essential and crucial component for realizing a multi-terminal high-voltage D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087
Inventor 马钊安婷邱宇峰
Owner STATE GRID CORP OF CHINA
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