Grid frequency disturbance recovery process output method
A technology for restoring the process and power grid frequency, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., and can solve problems such as off-line errors and reduced accuracy of estimation results
Active Publication Date: 2015-02-04
EAST CHINA GRID
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[0009] The purpose of the present invention is to provide a power grid frequency disturbance recovery process output method to predict the frequency change of the power grid after a certain set fault, especially to improve the offline error of the traditional frequency estimation method and in the case of large DC power input The problem of reduced accuracy of estimation results
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[0053] The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.
[0054] There are many factors that determine the frequency disturbance recovery process, and the relationship between them is intricate, and the input and output show a very significant external nonlinear relationship. Traditional estimation methods are difficult to deal with this nonlinear relationship, so the calculation accuracy is not high. Such as figure 1 As shown, considering the black box method to extract rules, assume that the problem to be solved is mainly divided into three levels: input layer 103 ,...
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The invention provides a grid frequency disturbance recovery process output method. The method comprises the steps: acquiring grid input data; acquiring grid output data according to a weight and the grid input data; acquiring grid frequency disturbance recovery process output according to the grid input data, the weight and the grid output data; acquiring an error function according to the grid output data and a set desired output value; inputting the grid input data and a set initial weight to a power grid, then, acquiring an initial error function value, setting a target range of the error function, and adjusting the initial weight until the error function value is in the target range if the initial error function value is outside the target range, wherein the weight obtained through last adjustment is a target weight, and the initial weight is the target weight if the initial error function value is in the target range. The method has the advantages that frequency change circumstances after a set fault occurs can be predicted, and real-time reserve capacity and UHV (Extra-High Voltage) high-power transmission power matched check on the power grid is realized.
Description
technical field [0001] The invention relates to the field of power grid management, in particular to an output method for a power grid frequency disturbance restoration process. Background technique [0002] In recent years, there have been several large-scale power outages in the world, causing serious economic losses and social shocks. There are many reasons for the blackout, involving all aspects of power grid planning, construction, dispatching operation and management, among which the adequacy of power grid backup is an important factor. Insufficient reserve capacity will lead to frequency instability in the event of large power loss in the power grid, and will cause system frequency collapse in severe cases. Therefore, timely grasp of reserve capacity is of great significance for the safe and stable operation of the power grid. [0003] There are many methods for calculating the total reserve in foreign countries. In summary, the methods for determining the total rese...
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Login to View More IPC IPC(8): G06F17/50
CPCY02E60/00
Inventor 周毅李维张楠
Owner EAST CHINA GRID