Power distribution network reactive power optimization compensation method based on load curve segmentation
A technology of load curve and compensation method, which is applied to reactive power compensation, circuit devices, AC network circuits, etc., can solve the problems of not involving reasonable weighting of reactive power compensation points, methods and strategies that do not have integrity and applicability, and achieve Good reactive power compensation effect, good rationality and applicability
Active Publication Date: 2021-08-24
STATE GRID CORP OF CHINA +2
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There are also studies that adopt the idea of load curve segmentation, and propose a reactive power optimization control strategy for the distribution network in different time periods, which has good practicability, but there is no research on the selection of reactive power compensation points and the reasonable weighting of each optimization index. The methodological strategy established is not very complete and applicable
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[0027] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0028] A reactive power optimization compensation method for distribution network based on load curve segmentation, such as figure 1 Shown include the following steps:
[0029] Step 1, based on the typical daily load curve of the distribution network, input the number of load segments N L , establish a multi-objective load curve optimization segmentation model for dividing the load curve into time periods;
[0030] Step 2, use the improved decomposition-based multi-objective optimization algorithm to solve the load curve optimization segmentation model established in step 1, obtain the Pareto optimal solution set of the load segmentation point, and use the weighting method to assign the optimal solution set The optimal load segmentation scheme is obtained through the weight evaluation. After optimizing the segmentation, the load scale at each ...
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The invention discloses a power distribution network reactive power optimization compensation method based on load curve segmentation, and the method comprises the steps: firstly building a multi-target optimization segmentation model of a typical daily load curve based on the thought of load curve time-segmented staticizing; secondly, on the basis of each load segment, providing a reactive compensation comprehensive sensitivity index to screen reactive compensation points, and establishing an optimization mathematical model for solving a reactive compensation scheme in each segment by taking the average voltage offset and the operation network loss of a power grid node as optimization indexes; and respectively solving the established optimization model by adopting a decomposition-based multi-objective optimization algorithm to obtain an optimal solution set, and carrying out weighting evaluation on the optimal solution set by utilizing subjective and objective combination weighting of an improved analytic hierarchy process and an anti-entropy weight method, so that a load segmentation result and an optimal compensation scheme corresponding to each segment can be obtained. The reactive power compensation optimization method provided by the invention is complete in system, reasonable and comprehensive in consideration factors, easy to realize in engineering, and capable of effectively realizing voltage adaptive control aiming at load random fluctuation of the power distribution network.
Description
technical field [0001] The invention belongs to a reactive power optimization compensation method for a distribution network, in particular to a reactive power compensation optimization method considering the random fluctuation characteristics of loads. Background technique [0002] The distribution network is an important part of the power system to directly supply power to users, but its structure and operating characteristics determine the problem of node voltage quality and line loss in the distribution network system, especially considering the impact of load fluctuations, it is often difficult to achieve power distribution. The high quality and economical requirements of network system operation. Therefore, it is necessary to establish an effective reactive power optimization compensation strategy to improve the voltage quality of the distribution network system and improve the operating economy, and can still meet the operating voltage quality requirements of the dist...
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IPC IPC(8): H02J3/16H02J3/50
CPCH02J3/16H02J3/50H02J2203/20Y02E40/30
Inventor 王乾力韩宏光谭继锐孙井辉苏新永战文华卢文华曹磊张辉谷凯凯顾然李穆周倩雯彭仲晗吴启瑞胡锦亮
Owner STATE GRID CORP OF CHINA