Frequency stability emergency control strategy correction method for adaptive power grid inertia change

Abstract

The invention discloses a frequency stability emergency control strategy correction method, device and storage medium for adaptive system inertia changes, including: obtaining the real-time inertia value of the system; according to the preset matching principle, searching and real-time inertia from the preset offline inertia set Matching offline inertia values; the preset offline inertia set includes multiple offline inertia values, and different offline inertia values ​​correspond to different high-frequency security control action thresholds, high-frequency security control action coefficient values, low-frequency security control action thresholds, and low-frequency security control action coefficient value; according to the high-frequency safety control action threshold value, high-frequency safety control action coefficient value, low-frequency safety control action threshold value and low-frequency safety control action coefficient value corresponding to the found offline inertia value, update the frequency stability emergency control strategy, and follow-up The system is controlled according to the updated frequency stabilization emergency control strategy. The invention can adapt to the change of grid inertia to adjust the control strategy, and improve the lean control level of the grid.

Description

Frequency stability emergency control strategy correction method for adaptive grid inertia change technical field The present invention relates to the safe and stable operation control technical field of power grid, particularly a kind of self-adaptive power grid inertia change A frequency stabilization emergency control strategy correction method, device and storage medium. Background technique [0002] In order to deal with environmental pollution, climate change, and ensure the sustainable development of the economy and society, the power grid has The proportion of access to clean energy such as power generation continues to increase, but due to factors such as seasons, day and night, and the environment, its power generation capacity cannot be Compared with the system based on conventional power supply, the power-on changes of various power sources in the power grid will increase under the new situation, and the moment of inertia of the power grid will increase. It...

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Problems solved by technology

[0002] In order to cope with environmental pollution, climate change, and ensure sustainable economic and social development, the proportion of clean energy sources such as hydropower, wind power, and photovoltaic power generation in the power grid continues to increase. However, due to factors such as seasons, day and night, and the environment, its power generation capacity cannot be effectively guaranteed. , compared with systems dominated by conventional power sources, under the new situation, various types of power sources in the power grid will have greater changes in starting up, and the moment of inertia of the power grid will continue to change accordingly, which intensifies the complexity of system frequency characteristics. At the same time, as the proportion of new energy continues to increase, The voltage regulation ability of the power grid is gradually declining, and the inhibitory effect of inertia on the frequency stability problem is more prominent. The traditional frequency stability security control strategy based on offline serious analysis will face more and more serious over-control problems, which can no longer meet the lean operation requirements of the power grid.

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