Multi-port hybrid direct current circuit breaker

A DC circuit breaker and hybrid technology, which is applied in the direction of AC network circuits, circuit devices, flexible AC transmission systems, etc., can solve the problems of increasing power costs, and achieve the effects of reducing costs, reducing use costs, and increasing failover branches

Active Publication Date: 2019-10-15
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that multiple power flow controllers need to be installed for coordinated use in order to adjust the power flow in different branches where the multi-port hybrid DC circuit breaker is located, which greatly increases the power cost, thereby providing A Multiport Hybrid DC Circuit Breaker

Method used

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  • Multi-port hybrid direct current circuit breaker

Examples

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Embodiment 1

[0034] This embodiment provides a multi-port hybrid DC circuit breaker, such as figure 1 As shown, it includes: a flow main branch 1 , a switch control branch 2 , a charge and discharge energy storage device 3 , a failover branch 4 , and a buffer branch 5 .

[0035] Specifically, in figure 1 , including three main flow branches 1, in other embodiments, the number of main flow branches 1 can also be three or more, the input end of each main flow branch 1 is connected to the DC bus 6, each The output end of each flow main branch 1 is connected to its corresponding wiring port 71 or 72 or 73, wherein the first port is 71, the second port is 72, and the third port is 73; specifically, each flow main branch Circuit 1 also includes: a mechanical switch and a power electronic switch connected in series. For example: in figure 1 Among them, the mechanical switch K1 in the first main flow branch 11 is connected in series with the power electronic switch M1, the mechanical switch K2 ...

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Abstract

The invention discloses a multi-port hybrid direct current circuit breaker. The multi-port hybrid direct current circuit breaker comprises at least one through-flow main branch; at least one group ofswitch control branch; and a charging-discharge energy storage device having a first end connected with the input end of each group of switch control branch and having a second end connected with theoutput end of each group of switch control branch, wherein a first switch device or a second switch device in each group of switch control branch is switched on or off. By controlling the switching on-off of the at least one group of switch control branch, the charging-discharge energy storage device and the first switch device or the second switch device in each group of switch control branch form a charging loop or a discharging loop, in the process of charging of the charging loop, a first current flowing through the charging loop is reduced, and in the process of discharging of the discharging loop, a second current flowing through the discharging loop is increased, so that open-circuit control of a transmission line is achieved, the power flow control of the transmission line is achieved, a power flow controller is not required to be independently configured, and the expenditure cost of the electric power is reduced.

Description

technical field [0001] The invention relates to the technical field of DC circuit breakers, in particular to a multi-port hybrid DC circuit breaker. Background technique [0002] With the rapid development of the DC power grid, the development of the DC power grid is of great significance to the long-distance transmission of large-scale electric energy, the access of renewable distributed energy, and the improvement of power stability. As a key component of the DC power grid, the DC circuit breaker plays an important role in closing, carrying and breaking the current under normal circuit conditions, converting the operating mode of the system, and cutting off the fault current to protect the system. It is an important equipment for building a DC power grid. one. In recent years, with the introduction of high-voltage direct current transmission network and direct current distribution system, the research on medium and high-voltage direct current circuit breakers and their co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02J3/18
CPCH02H7/268H02J3/1842Y02E40/10
Inventor 尹靖元韦统振吴理心霍群海韩立博张桐硕师长力
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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