An Integrated Stability Control Method for Power Grid Coping with Feed-in DC Faults
A stability control method and technology for DC faults, applied in AC network circuits, power transmission AC networks, and AC network load balancing, etc., can solve problems such as increased tie line power, threats to the safe and stable operation of the power grid, and system power angle instability. Achieve the effect of reducing the number of times, avoiding adverse effects, and ensuring system stability
Active Publication Date: 2021-11-02
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology
[0002] At present, my country's UHV AC-DC interconnected power grid has the characteristics of "strong DC and weak AC". The DC fault of the receiving-end power grid will lead to a substantial increase in the power of the tie line between the receiving-end power grid and the sending-end power grid. The risk of corner instability seriously threatens the safe and stable operation of the power grid
[0003] For the problem that the power angle of the system on both sides of the tie line is unstable due to the feed-in DC fault faced by the receiving-end power grid, load-shedding control measures are usually used, which will adversely affect the power supply of users
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0033] A power grid comprehensive stability control method to deal with feed-in DC faults. The energy storage power station increases the available energy storage power to ensure system stability. If all energy storage power stations are increased to the maximum available energy storage power, it is not enough to ensure system stability. Apply load shedding measures. Such as figure 1 and figure 2 As shown, the integrated grid stability control method provided by the present invention to deal with feed-in DC fault ensures system stability by using the energy storage power station to increase the available energy storage power.
[0034] Specifically include the following steps: ...
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The invention discloses a comprehensive stability control method for power grids to cope with feed-in DC faults. The energy storage power station increases the available energy storage power to ensure system stability. If all energy storage power stations are raised to the maximum available energy storage power, it is not enough to ensure When the system is stable, apply load shedding measures. The comprehensive grid stability control method provided by the present invention to cope with feed-in DC faults ensures system stability by preferably using energy storage power stations to increase the available energy storage power, reducing the amount of load shedding using load shedding control measures or avoiding the use of load shedding control measures , Alleviate or avoid the adverse impact on the user's power supply.
Description
technical field [0001] The invention relates to the technical field of power system safety and stability, in particular to a power grid comprehensive stability control method for dealing with feed-in DC faults. Background technique [0002] At present, my country's UHV AC-DC interconnected power grid has the characteristics of "strong DC and weak AC". The DC fault of the receiving-end power grid will lead to a substantial increase in the power of the tie line between the receiving-end power grid and the sending-end power grid. The risk of corner instability seriously threatens the safe and stable operation of the power grid. [0003] For the problem of power angle instability of the system on both sides of the tie line caused by the feed-in DC fault faced by the receiving end grid, load shedding control measures are usually used, which will adversely affect the power supply of users. Contents of the invention [0004] The technical problem to be solved by the present inven...
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IPC IPC(8): H02J3/00H02J3/28H02J3/24H02J3/36
CPCH02J3/00H02J3/24H02J3/28H02J3/36Y02E60/60
Inventor 王青薛好李轶群訾鹏宋云亭陈得治谭贝斯王茂海李立新马世英贾琳闫旭
Owner CHINA ELECTRIC POWER RES INST