Multi-port DC line intersection fault processing system and method
A technology for DC lines and processing systems, applied in fault locations, information technology support systems, fault detection by conductor type, etc., to solve problems such as failure to work properly, affecting other circuits and port operations
Pending Publication Date: 2019-11-22
SHANDONG TAIKAI HIGH VOLTAGE SWITCH
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Problems solved by technology
[0004] Although the above isolation method can isolate the faulty circuit, once the line fault is isolated, the two ports of the faulty line will not work normally, which may affect the operation of other circuits and ports
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[0023] The scheme will be described below in conjunction with the accompanying drawings and specific implementation methods.
[0024] figure 1 For a multi-port DC line interchange fault handling system provided by the embodiment of the present application, see figure 1 , the multi-port DC line intersection fault handling system in this embodiment includes a DC circuit breaker arranged between any two DC line ports, a bipolar isolation grounding switch is set at each DC line port, and each The double-pole isolating grounding switch is respectively electrically connected to the corresponding DC line port and the two adjacent DC circuit breakers.
[0025] specifically, figure 1 Three schematic DC line ports A, B and C are given in , the three-port DC line fault handling system includes a first DC circuit breaker 1 arranged between the DC line port A and the DC line port B, and the DC line A second DC circuit breaker 2 between port A and DC line port C, a third DC circuit break...
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The invention discloses a multi-port DC line intersection fault processing system and method, and relates to the technical field of direct-current power transmission and distribution system circuits.The port direct-current line fault processing system comprises a direct-current circuit breaker arranged between any two direct-current line ports, each direct-current line port is provided with a bipolar isolation grounding switch, and each bipolar isolation grounding switch is electrically connected with the corresponding direct-current line port and the two adjacent direct-current circuit breakers. Because the direct-current circuit breaker is arranged between the adjacent direct-current line ports, the connection redundancy between any two ports can be realized through the bipolar isolation grounding switch at each direct-current line port. When any line breaks down, the line can be isolated through the corresponding direct-current circuit breaker, and meanwhile normal operation of direct-current line ports at the two ends of the faulted line at the intersection is guaranteed through cooperation with the bipolar isolation grounding switch. Therefore, the influence of fault line isolation at the intersection on the DC line port and other lines is reduced.
Description
technical field [0001] The present application relates to the technical field of DC power transmission and distribution system circuits, and in particular to a multi-port DC line intersection fault handling system and method. Background technique [0002] With the continuous adjustment and improvement of the energy strategic structure, multi-terminal flexible DC transmission has gradually become an important technical means to solve the grid connection of new energy. Although the multi-terminal flexible DC transmission has broad application prospects, the current work mainly focuses on the research of its control protection strategy and topology, and there are still many problems to be solved in the actual engineering structure layout. [0003] In a multi-terminal flexible DC system, there usually exists a junction at the intersection of multi-port DC lines. At the same time, when a fault occurs in the connecting lines at two adjacent ends, it will quickly affect other ports...
Claims
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IPC IPC(8): H02H7/26G01R31/08H02J3/36
CPCH02H7/268G01R31/086H02J3/36Y04S10/52Y02E60/60
Inventor 张公一张志成肖风良李伟罗光荣屈鲁谢文刚
Owner SHANDONG TAIKAI HIGH VOLTAGE SWITCH