An optimal compensation method for reactive power in distribution network 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: 2022-06-28
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] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:
[0028] A reactive power optimization compensation method for distribution network based on load curve segmentation, such as figure 1 The steps shown include the following:
[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 segment model that divides the load curve into time periods;
[0030] Step 2, using the improved decomposition-based multi-objective optimization algorithm to solve the load curve optimization segment model established in step 1, obtain the Pareto optimal solution set of the load segment point, and use the weighting method to assign the optimal solution set. The optimal load segmentation scheme is obtained through weight evaluation. After the optimization of segmentation, the load scale at e...
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The invention discloses a reactive power optimization compensation method for a distribution network based on load curve segmentation. Firstly, the invention establishes a multi-objective optimal segment model of a typical daily load curve based on the idea of segmenting the load curve statically. Secondly, based on each load segment, a comprehensive sensitivity index of reactive power compensation is proposed to screen reactive power compensation points, and the average offset of grid node voltage and operating network loss are used as optimization indicators to establish a reactive power compensation scheme for each segment optimized mathematical model. Using the multi-objective optimization algorithm based on decomposition to solve the established optimization model to obtain the optimal solution set, and use the subjective and objective combination weighting of the improved analytic hierarchy process and anti-entropy weight method to evaluate the optimal solution set weighting, which can be Obtain the load segment results and the optimal compensation scheme corresponding to each segment. The reactive power compensation optimization method proposed by the invention has a complete system, reasonable and comprehensive consideration factors, easy engineering implementation, and can effectively realize voltage self-adaptive control for random load fluctuations of a distribution network.
Description
technical field [0001] The invention belongs to a reactive power optimization compensation method of a distribution network, in particular to a reactive power compensation optimization method considering random fluctuation characteristics of loads. Background technique [0002] The distribution network is an important link in the power system that directly supplies power to users, but its structure and operation characteristics determine that the problems of voltage quality and line loss at the nodes of the distribution network system are prominent, especially considering the influence of load fluctuations, it is often difficult to achieve the distribution network. High-quality and economical requirements for 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 still meet the requirements of the o...
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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