Power system transient stability prevention and emergency coordination control auxiliary decision-making method

A transient stability and power system technology, applied in neural learning methods, computer-aided design, information technology support systems, etc. Instability prevention and control decision-making and other issues, to achieve the effect of improving the level of operational safety

Pending Publication Date: 2021-11-02
SICHUAN UNIV
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  • Application Information

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Problems solved by technology

The use of preventive control alone is likely to cause too high control costs for grid operation; the use of emergency control alone may increase the risk of grid instability, and if the control strategy is improper, there may be "negative effects" and secondary shocks, which is not conducive to the ...

Method used

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  • Power system transient stability prevention and emergency coordination control auxiliary decision-making method
  • Power system transient stability prevention and emergency coordination control auxiliary decision-making method
  • Power system transient stability prevention and emergency coordination control auxiliary decision-making method

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Embodiment

[0069] Such as figure 1 As shown, a power system transient stability prevention and emergency coordinated control auxiliary decision-making method includes the following steps:

[0070] S1: Sampling the day-ahead load forecast and the day-ahead unit combination to generate random operating conditions, and the generated random operating conditions form a power grid operating condition database;

[0071] S2: Set the expected fault set according to the target power system, and carry out the simulation analysis of the transient stability of the target power system one by one on the power grid operating condition database and the expected fault set through the hybrid method combined with the single machine equivalent and equal area rules, and obtain the power grid Transient stability sample data sets and instability samples of operating conditions;

[0072] S3: According to the instability samples, the emergency shutdown control strategy is randomly generated, and the emergency sh...

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Abstract

The invention discloses a power system transient stability prevention and emergency coordination control auxiliary decision-making method, and relates to the technical field of power system automation, and the method comprises the steps: obtaining the real-time operation condition of a power grid, and pre-judging the transient stability of the real-time operation condition of the power grid through a trained Bayesian deep neural network model, wherein the operation condition comprises power grid operation topological structure information and a day-ahead unit; establishing transient stability constraints by the trained Bayesian deep neural network model, combining the transient stability constraints with power grid quasi-steady-state scheduling operation constraints, and establishing a power system transient stability prevention and emergency coordination control decision model; and iterating the power system transient stability prevention and emergency coordination control decision model through a Bayesian optimization algorithm based on a Gaussian process agent model to generate a power system transient stability prevention and emergency coordination control strategy. The method can monitor the dynamic safety state of the power grid in real time, and effectively improves the operation safety level of a power system.

Description

technical field [0001] The invention relates to the technical field of power system automation, in particular to an auxiliary decision-making method for power system transient stability prevention and emergency coordination control. Background technique [0002] The two factors of the continuously growing demand for power load and the relatively lagging power grid upgrade and expansion construction have caused the decline in the safety and stability margin of the power grid operation, and the system operating point is getting closer and closer to the stability limit. In order to prevent large-scale power outages caused by transient instability, effective online evaluation of power system transient stability and control-aided decision-making methods are urgently needed. Most prior art methods consider preventive control and emergency control strategies separately. However, preventive control and emergency control are important components of the "three lines of defense" of th...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06N3/04G06N3/08H02J3/00G06F111/04G06F111/08G06F111/10G06F119/06
CPCG06F30/27G06N3/08H02J3/001H02J3/0012G06F2111/04G06F2111/08G06F2111/10G06F2119/06H02J2203/20G06N3/047Y04S10/50
Inventor 刘挺坚刘友波刘俊勇许立雄高书宇
Owner SICHUAN UNIV
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