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A Constraint Handling Method for Economic Dispatch

A technology of economic scheduling and processing methods, applied in the field of economic scheduling of power systems, can solve problems affecting solution efficiency and convergence, and equality constraints cannot be satisfied, so as to improve solution efficiency and solution accuracy, promote solution efficiency, and achieve superiority Effect

Active Publication Date: 2021-05-28
河北凯通信息技术服务有限公司
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a constraint processing method for economic scheduling, which is used to solve the problem that the algorithm existing in the prior art can not satisfy the problem of solving the economic scheduling problem because the equality constraint can not be satisfied, which affects the solution efficiency and convergence

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  • A Constraint Handling Method for Economic Dispatch
  • A Constraint Handling Method for Economic Dispatch
  • A Constraint Handling Method for Economic Dispatch

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with accompanying drawing:

[0059] The constraint processing method of the economic scheduling described in the present invention, such as figure 2 shown, including the following steps:

[0060] Step 1, establish an economic dispatch model, including its objective function and constraints;

[0061] a. Establish the objective function

[0062] In the case of satisfying the constraint conditions, the objective function is to minimize the total power generation cost of the generator set, and its mathematical expression is as follows:

[0063]

[0064] (1) In the formula, P i is the output power of unit i; a i ,b i ,c i is the cost coefficient of unit i; N is the total number of units;

[0065] b. Set the constraint conditions of the model, which include system power balance constraints and conventional unit output upper and lower limits;

[0066] The specific constraints are:

[0067] 1) Sys...

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Abstract

The invention discloses a constraint processing method of economic scheduling, step 1, establishing an economic scheduling model, including its objective function and constraint conditions; step 2, screening candidate solutions generated by the algorithm in the current iteration that do not satisfy the equality constraints, Find the micro-increase rate of each unit and the violation of the equality constraint; step 3, use the micro-increase rate to apportion the violation amount according to the different situations of power increase or decrease; step 4, update the output of each unit. Beneficial effects of the present invention: effectively avoid the generation of a large number of invalid solutions, and promote the solution efficiency of the algorithm; in the case of no improvement to the algorithm, it has better advantages than the existing economic scheduling method, can reduce the solution time, improve Solution efficiency and solution accuracy.

Description

technical field [0001] The invention relates to the field of power dispatching, in particular to a power system economic dispatching technology. Background technique [0002] Economic dispatch takes the lowest power supply cost or energy consumption of the whole network as the objective function, and dispatches according to the equal micro-increase rate method and the coordination equation. It is an important tool to realize the economic operation of the power system and a scientific method in the operation link. It is a scheduling principle generally adopted by various countries in the world. Power system economic dispatch is a high-dimensional, non-convex, nonlinear constrained optimization problem, so it is very difficult to solve this problem, especially to deal with the mutual coupling constraints. my country's power system has long insisted on centralized dispatching. Centralized dispatch will make it more difficult to solve the economic dispatch of the power system,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46H02J3/00
CPCH02J3/008H02J3/46H02J2203/20
Inventor 李学平肖灿玮卢志刚
Owner 河北凯通信息技术服务有限公司
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