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A Modeling Method for Simulation of Power System Load Characteristics

A technology of load characteristics and modeling methods, applied in electrical components, circuit devices, genetic models, etc., can solve the problems of low simulation model accuracy and low analysis efficiency, so as to solve the problem of load time-varying, improve simulation accuracy, and reduce dimensionality. effect of numbers

Active Publication Date: 2015-12-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0005] The object of the present invention is to propose a modeling method for power system load characteristic simulation, which mainly includes:

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  • A Modeling Method for Simulation of Power System Load Characteristics
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  • A Modeling Method for Simulation of Power System Load Characteristics

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Embodiment Construction

[0024] The present invention proposes a modeling method for power system load characteristic simulation, such as figure 1 As shown, it mainly includes:

[0025] Step 1. Based on the measured load characteristic data, a multi-dimensional comprehensive genetic algorithm is used for parameter identification, and a load model corresponding to different disturbance moments is established;

[0026] Step 2. Select a reasonable voltage excitation and apply it to the above-mentioned measured load model in sequence to obtain the eigenvector based on the response space;

[0027] Step 3, regard the above-mentioned feature vector as a time series, and perform a piecewise linear representation of the time series, reduce the dimension of the feature vector, and use it for cluster analysis;

[0028] Step 4: Carry out multi-curve fitting parameter identification for each type of corresponding measured data, and obtain a model capable of characterizing the load characteristics of these measure...

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Abstract

The invention belongs to the field of simulation modeling of power systems, and particularly relates to a modeling method for load characteristic simulation of a power system. The method comprises the steps that on the basis of actually measured load modeling, a multi-dimensional comprehensive genetic algorithm is adopted to perform identification on characteristic data of an actually measured load; power response data of an obtained model under the excitation of trapezoidal wave voltage serve as characteristic vectors for cluster analysis; in order to reduce the dimensionality of the characteristic vectors and enhance the efficiency of the cluster analysis, piecewise linearization based on time series is performed on the characteristic vectors. According to the modeling method, the problem of time-varying characteristics of a load can be effectively solved, simulation precision is improved, and a more accurate load model is provided for engineering practice.

Description

technical field [0001] The invention belongs to the field of power system simulation modeling, in particular to a modeling method for power system load characteristic simulation. Background technique [0002] The safe and stable operation of the power system is very important to the development of the national economy and the normal life of the people. Power system digital simulation is an indispensable tool for power system planning, operation and research. The load model has an important influence on the analysis results of the dynamic stability of the power system, so it is necessary to establish a load model that conforms to the reality. However, the power load has the characteristics of complexity, time-varying, and distribution, which makes the establishment of load model very difficult. The load modeling method based on actual measurement has certain advantages in solving the time-varying load model because it can measure load characteristic data at different times,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06N3/12
Inventor 徐衍会宋歌张蓝宇
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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