A control method for DC line fault restart
A DC line fault and control method technology, applied in the field of power transmission and distribution, can solve problems such as DC line fault restart failure, execution logic solidification, and increase the probability of DC transmission system blocking, so as to avoid DC line fault restart failure , reduce the risk of unstable operation, and reduce the effect of blocking probability
Active Publication Date: 2019-06-28
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 explain the DC line fault restart control method provided by the embodiment of the present invention, a detailed description will be given below in conjunction with the accompanying drawings of the specification.
[0019] See figure 1 , The control method for restarting after a DC line failure provided by the embodiment of the present invention includes:
[0020] Obtain the operating mode of the DC transmission system when a DC line failure occurs in the DC transmission system;
[0021] Determine whether the operation mode is a networked operation mode or an island operation mode;
[0022] If the operating mode is a networked operating mode, then select to implement a networked control strategy of restarting after a DC line failure;
[0023] If the operating mode is an islanding operating mode, the islanding control strategy of restarting after a DC line failure is selected.
[0024] In the DC line fault restart control method provided by the embodiment of the ...
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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, and in particular to a control method for restarting after a DC line failure. Background technique [0002] In the DC transmission system that adopts the long-distance large-capacity transmission mode, because the geographical span of the DC transmission line is relatively wide, and the cross-regional situation of the DC transmission line is complex and changeable, it is inevitable that the DC transmission system will have various problems during its operation. A kind of DC line fault, among which the instantaneous ground fault of the DC transmission line is the most common. [0003] At present, when a DC line failure occurs in the DC transmission system, the DC transmission system usually needs to restart after the DC line failure. However, due to the existing DC line fault restart, it is often executed according to the preset number of fault restart times, de-freeing time,...
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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