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Frequency stability emergency control strategy correction method and device adaptive to power grid inertia change and storage medium

An emergency control and frequency stabilization technology, applied in circuit devices, electrical components, AC network circuits, etc., can solve problems such as failure to meet the requirements of lean operation of the power grid, failure to effectively guarantee power generation capacity, and aggravate the complexity of system frequency characteristics. Improve the level of power grid lean control and improve the effect of adaptability

Active Publication Date: 2020-12-18
NARI NANJING CONTROL SYST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • Frequency stability emergency control strategy correction method and device adaptive to power grid inertia change and storage medium
  • Frequency stability emergency control strategy correction method and device adaptive to power grid inertia change and storage medium

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Experimental program
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Embodiment 1

[0043] This embodiment introduces a frequency stabilization emergency control strategy correction method, refer to figure 1 As shown, the methods include:

[0044] Obtain the real-time inertia value of the system;

[0045]According to the preset matching principle, search for the offline inertia value that matches the real-time inertia from the preset offline inertia set; the preset offline inertia set includes multiple offline inertia values, and different offline inertia values ​​correspond to different high-frequency security control actions Threshold value, high frequency safety control action coefficient value, low frequency safety control action threshold value and low frequency safety control action coefficient value;

[0046] 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 correspon...

Embodiment 1-1

[0050] Based on Embodiment 1, this embodiment specifically introduces the implementation of a frequency stabilization emergency control strategy correction method, refer to figure 2 As shown, method implementation specifically involves the following:

[0051] 1) Obtain the existing power grid safety control action threshold and action coefficient fixed value restricted by transient high frequency and low frequency stability problems, key control fault information, inertia of conventional power installed in the whole network and minimum technical output information, typical electromechanical simulation data , the minimum power-on information, the minimum spin-up information and other data;

[0052] 2) By changing the normal power supply and starting up, the simulation calculation system inertia changes the high-frequency and low-frequency security control action thresholds and action coefficients under key control faults, as follows:

[0053] 2-a) Usually, the transient freq...

Embodiment 2

[0065] This embodiment introduces a frequency-stabilized emergency control device for adaptive system inertia, including:

[0066] The data acquisition module is configured to obtain the real-time inertia value of the system;

[0067] The system inertia matching module is configured to search for an offline inertia value that matches the real-time inertia from a preset offline inertia set according to a preset matching principle; the preset offline inertia set includes a plurality of offline inertia values, different The offline inertia value corresponds to different high-frequency security control action threshold values, high-frequency security control action coefficient values, low-frequency security control action threshold values, and low-frequency security control action coefficient values;

[0068] The strategy update module is configured to update the high-frequency safety control action threshold value, high-frequency safety control action coefficient value, low-frequ...

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Abstract

The invention discloses a frequency stability emergency control strategy correction method and device adaptive to system inertia change and a storage medium. The frequency stability emergency controlstrategy correction method comprises the steps of obtaining a system real-time inertia value, searching an offline inertia value matched with the real-time inertia from a preset offline inertia set according to a preset matching principle, wherein the preset offline inertia set comprises a plurality of offline inertia values, and different offline inertia values correspond to different high-frequency safety control action threshold values, high-frequency safety control action coefficient values, low-frequency safety control action threshold values and low-frequency safety control action coefficient values, and updating a frequency stability emergency control strategy according to the high-frequency safety control action threshold value, the high-frequency safety control action coefficientvalue, the low-frequency safety control action threshold value and the low-frequency safety control action coefficient value corresponding to the searched offline inertia value, and subsequently performing system control according to the updated frequency stability emergency control strategy. The control strategy can be adjusted by self-adapting to the inertia change of the power grid, and the lean control level of the power grid is improved.

Description

technical field [0001] The invention relates to the technical field of safe and stable operation control of power grids, in particular to a frequency stability emergency control strategy correction method, device and storage medium for adaptive power grid inertia changes. Background technique [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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/24H02J13/00H02J3/38H02J3/46G06F30/20
CPCH02J3/00H02J3/24H02J3/241H02J13/00002H02J3/38H02J3/466G06F30/20H02J2203/20H02J2203/10Y04S10/12Y02E40/70
Inventor 常海军万玉良刘福锁孙仲卿王超吴坚李威项颂黄畅想孙震宇陈璐李兆伟王玉刘鑫赵学茂朱玲郄朝辉
Owner NARI NANJING CONTROL SYST