SVM static reactive load modeling method based on air conditioner load proportion
A technology of air-conditioning load and static reactive power, applied in reactive power compensation, reactive power adjustment/elimination/compensation, AC network circuits, etc., can solve problems such as discontinuous fitting coefficients, achieve noise and abnormal value insensitivity, The effect of high fitting accuracy
Inactive Publication Date: 2021-06-18
ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +1
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[0020] The purpose of the present invention is how to use the support vector machine to model the static reactive power load considering the proportion of the air conditioner, so as to solve the problem of discontinuous fitting coefficient caused by only a few sets of load reactive power characteristic data in the model in the traditional method
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Embodiment 1
[0038] like figure 1 As shown, a SVM static reactive load modeling method based on air-conditioning load ratio includes the following steps:
[0039] 1. Use SVM to establish the nonlinear mapping relationship between the total reactive power demand of the comprehensive load and the voltage amplitude, frequency value and air-conditioning load ratio, expressed as follows:
[0040] y=a 1 k(x 1 ,x)+a 2 k(x 2 ,x)+a S k(x S ,x) (3)
[0041] In the formula, y is the total reactive power demand of the comprehensive load, x is a three-dimensional vector composed of voltage amplitude, frequency value, and air-conditioning load ratio, k() is the SVM kernel function, and x 1 , x 2 and x S is the support vector of voltage amplitude, frequency value and air conditioner load ratio, a 1 , a 2 and a S for x 1 , x 2 and x S corresponding coefficients.
[0042] 2. The coefficient a can be obtained by learning and training the SVM with the sample data of load reactive power charac...
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The invention discloses an SVM static reactive load modeling method based on an air-conditioning load proportion and belongs to the technical field of power grid simulation calculation. The method comprises the following steps of establishing a nonlinear mapping relation among reactive power, voltage amplitude, frequency value and air-conditioning load proportion by using an SVM, and taking the air-conditioning load proportion as a load characteristic parameter to obtain a load characteristic parameter; the key effect of the air conditioner load proportion on the reactive characteristics of the comprehensive load being highlighted, and a problem that fitting coefficients are discontinuous due to the fact that only several sets of load reactive characteristic data exist in a model in a traditional method being solved; acquiring a certain amount of learning data through data sampling, then learning by adopting an SVM (Support Vector Machine) algorithm, and testing by using a test sample after learning; and calculating the load reactive power characteristic data of any air conditioner proportion through a few groups of load reactive power characteristic data; The static reactive load modeling method has advantages of being high in fitting precision and insensitive to noise and abnormal values.
Description
technical field [0001] The invention belongs to the technical field of power grid simulation calculation, and relates to an SVM static reactive load modeling method based on the air conditioner load ratio. Background technique [0002] The problem of voltage stability of power system has become one of the topics that are generally concerned by the power industry at home and abroad. Power system voltage instability accidents usually occur during the peak load and the power system is in a small operating margin. These accidents have caused huge economic losses and social impacts, and their serious consequences have attracted widespread attention. Among the many factors affecting voltage stability, the power load characteristic is the most critical and direct factor. In the summer of 1987, one of the main reasons for the voltage collapse accident in the Tokyo Electric Power System in Japan was the increase of a large number of air-conditioning loads with bad characteristics u...
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Login to View More IPC IPC(8): H02J3/18
CPCH02J3/18H02J2203/20Y02E40/30
Inventor 占勇毛荀高博林哲敏郭力王桢
Owner ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER