Risk-based optimal allocation method for fault current limiters in high-dimensional and multi-objective complex power grids
A fault current limiter, power grid fault technology, applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc.
Active Publication Date: 2021-03-23
ZHEJIANG UNIV
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Problems solved by technology
This method cannot effectively deal with the high probability of short-circuit faults in the power system
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[0066] The present invention will be further described below in conjunction with accompanying drawing.
[0067] like figure 1 Shown, the specific implementation process that is implemented according to the complete method of the present invention is as follows:
[0068] (1) First, based on the fault model and statistical data of the power line, the long-term short-circuit fault probability of the power line is calculated, and the corresponding expected fault set is generated.
[0069] In this embodiment, the IEEE New England 39-node system is selected for method verification.
[0070] First, according to the bathtub curve of the power system, the basic failure probability of the power line is obtained; then, based on the climate data and environmental data of the location of the power line, the covariate connection parameters are obtained; finally, based on the calculated basic failure probability and covariate Connection parameters to obtain the long-term short-circuit fail...
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The invention discloses a risk-based optimal configuration method for a high-dimensional multi-target complex power grid fault current limiter. The method comprises the steps of obtaining the basic fault probability of a power line according to the bathtub curve of a power system; obtaining a covariable connection parameter according to the climate data and the environment data of the position where the power line is located; obtaining a long-term short-circuit fault probability of the power line according to the basic fault probability and the covariable connection parameter; establishing a target function and constraint conditions of a multi-target power system fault current limiter configuration model considering the long-term short-circuit fault probability of the power line; and solving to obtain a Pareto optimal solution set, and selecting optimal power system fault current limiter configuration from the Pareto optimal solution set. According to the method, the long-term short-circuit fault probability of the power line is considered, the calculation method of the power system fault current limiter configuration is provided, and the operation safety of the power system is improved.
Description
technical field [0001] The invention belongs to a method for optimizing a fault current limiter of a power system under the background of a short-circuit fault, and in particular relates to a risk-based optimal configuration method for a fault current limiter of a high-dimensional, multi-objective and complex power grid. Background technique [0002] Short-circuit fault is one of the most common fault types and outstanding problems in power system operation, which has attracted extensive attention in recent years. Furthermore, as power systems interconnect and expand, short-circuit current levels increase significantly. The problem of short-circuit current exceeding the allowable range is plagued in many countries, especially in China. Therefore, there is an urgent need to propose a configuration method for fault current limiters in power systems to achieve optimal decision-making in the planning stage. [0003] As an effective solution, fault current limiters are widely u...
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IPC IPC(8): H02H9/02H02J3/00G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/06313G06Q50/06H02H9/02H02J3/00
Inventor 叶承晋郭超丁一宋永华郭创新
Owner ZHEJIANG UNIV