A Granular Computing Based Economic Dispatch Method of Line Power Flow

A technology of economic scheduling and granular computing, which is applied to AC networks, circuit devices, and AC network circuits with the same frequency from different sources, can solve problems such as the difficulty of solving economic scheduling in power systems, and achieve convergence difficulties and improve computing power. The effect of improving accuracy and improving solution efficiency

Inactive Publication Date: 2019-01-29
河北源盛环保科技有限公司
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Problems solved by technology

Centralized dispatch will make it more difficult to solve the economic dispatch of the power system, and it is urgent to find an effective method to solve the economic dispatch of large power grids

Method used

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  • A Granular Computing Based Economic Dispatch Method of Line Power Flow
  • A Granular Computing Based Economic Dispatch Method of Line Power Flow
  • A Granular Computing Based Economic Dispatch Method of Line Power Flow

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Embodiment Construction

[0073] The present invention will be further described below in conjunction with the accompanying drawings.

[0074] A method of line flow economic dispatch based on granular computing in the present invention, the flow chart of the method is as follows Figure 6 As shown, the method includes the following steps:

[0075] Step 1, establish an economic dispatch model, including its objective function and constraints;

[0076] In step 1, the specific process of establishing the economic dispatch model is as follows:

[0077] a. Establish the objective function

[0078] In the case of satisfying the constraint conditions, the objective function is to take the minimum total power generation cost of the generator, and its mathematical expression is as follows:

[0079]

[0080] (1) In the formula, P G，i is the output power of unit i; a i , b i , c i is the cost coefficient of the i-th unit; N is the total number of units;

[0081] b. Set the constraint conditions of the ...

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Abstract

The invention discloses a granular computing-based economic dispatching method of line power flow. The method comprises the steps of (1) building an economic dispatching model which comprises an objective function and constraint conditions; (2) carrying out hierarchical granulation on a power network; (3) carrying out network simplification, simplifying the network by adopting a Ward equivalent method and effectively reducing network nodes; and (4) optimizing the power flow of the network by adopting a granular computing method. The granular computing-based economic dispatching method of the line power flow has the beneficial effects that considered factors are comprehensive; the computing accuracy is improved; a strategy of hierarchical granulation solving is provided, the solving time can be shortened and the solving efficiency is improved; and for a large-scale power network, if a reasonable hierarchical granular computing method is adopted, the convergence problem can be solved and the computing speed can also be improved.

Description

technical field [0001] The invention relates to the technical field of power system economic dispatching, in particular to a method for line flow economic dispatching based on granular computing. 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. At present, the main problems encountered in the online economic dispatching research of large power grids are the large amount of data, the long time period of acquisition and calculation, and the difficulty of reflecting the operation of the power grid in real time, which makes it difficult to realize economic dispatching. Power sys...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 李学平方亮星卢志刚
Owner 河北源盛环保科技有限公司
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