Control method of DC circuit failure restart
A technology of DC line fault and control method, applied in the field of power transmission and distribution, can solve the problems of failure of restart of DC line fault, solidification of execution logic, increase probability of blocking of DC transmission system, etc., so as to avoid failure of restart of DC line fault , the effect of reducing the risk of running instability and the probability of blocking
Active Publication Date: 2018-03-09
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology
However, due to the fact that the existing DC line fault restart is often performed according to the preset number of fault restarts, de-ionization time and start-up voltage corresponding to the number of fault restarts, the execution logic of the DC line fault restart is relatively complex. Solidification, it is difficult to adapt to the DC transmission system operating in multiple modes, resulting in the risk of failure in the restart of the DC line failure of the DC transmission system
Once the DC line failure of the DC transmission system fails to restart, the operation time of the DC stability control device will be extended accordingly, which will easily increase the probability of DC transmission system blocking and increase the risk of unstable operation of the power system where the DC transmission system is located.
Method used
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[0018] In order to further illustrate the control method for restarting the DC line fault provided by the embodiment of the present invention, a detailed description will be given below in conjunction with the accompanying drawings.
[0019] see figure 1 , the control method for DC line fault restart provided by the embodiment of the present invention includes:
[0020] Obtain the operating mode of the DC transmission system when a DC line fault occurs in the DC transmission system;
[0021] Judging whether the operation mode is a network operation mode or an island operation mode;
[0022] If the operation mode is a networked operation mode, then select a networked control strategy for restarting after a DC line failure;
[0023] If the operating mode is an islanding operating mode, an islanding control strategy is selected to implement DC link fault restart.
[0024] In the control method for restarting the DC line fault provided by the embodiment of the present invention...
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The invention discloses a control method of DC circuit failure restart, and relates to the technical field of power transmission and distribution. The method is used for reducing the probability of shutdown of a DC power transmission system caused by failures of a DC circuit. The method includes the steps of obtaining a running mode of the DC power transmission system when the DC circuit failure happens to the DC power transmission system, judging whether the running mode is a networking operating mode or an isolated island operating mode, if the running mode is the networking operating mode,selecting to execute a networking control strategy of the DC circuit failure restart, and if the running mode is the isolated island running mode, selecting to execute an isolated island control strategy of the DC circuit failure restart. The method is used for the DC circuit failure restart of the DC power transmission system.
Description
technical field [0001] The invention relates to the technical field of power transmission and distribution, in particular to a control method for restarting a DC line fault. Background technique [0002] In the DC transmission system adopting the long-distance large-capacity transmission mode, due to the wide geographical span of the DC transmission line, and the complex and changeable geographical conditions across the DC transmission line, it is inevitable that various problems will occur during the operation of the DC transmission system. There are many types of DC line faults, among which the grounding transient fault of DC transmission lines is the most common. [0003] At present, when a DC line fault occurs in the DC power transmission system, the DC power transmission system usually needs to be restarted after the DC line fault. However, due to the fact that the existing DC line fault restart is often performed according to the preset number of fault restarts, de-io...
Claims
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IPC IPC(8): H02H7/26H02J1/00
CPCH02H7/268H02J1/00
Inventor 李春华李明李岩黄莹饶宏曹润彬郭铸黄伟煌刘涛陈怡静李婧靓
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD