Multi-target generating set combination model based on security domain target and constraint and solving method

A unit combination, multi-target technology, applied in the direction of AC networks, AC network circuits, circuit devices, etc. with the same frequency of different sources

Active Publication Date: 2017-10-24
WUHAN UNIV +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of the extended ε constraint method in power system optimization problems has not been reported yet.

Method used

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  • Multi-target generating set combination model based on security domain target and constraint and solving method
  • Multi-target generating set combination model based on security domain target and constraint and solving method
  • Multi-target generating set combination model based on security domain target and constraint and solving method

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Embodiment

[0052] One, at first introduce the concrete method steps of the present invention:

[0053] The model of the present invention is based on the following objective functions and constraints:

[0054] The objective function described is a multi-objective form:

[0055]

[0056] In the formula: F l (X) is the lth objective function; X is the decision vector; g j (X), h k (X) is an equality and inequality constraint function; n 1 , n 2 is the number of equality constraints and inequality constraints.

[0057] One of the objective functions is defined as the lowest cost of generating electricity for the system, based on:

[0058]

[0059] where P it is the output active power of conventional unit i in period t; f it (P it ) is the operating cost of conventional unit i; U it is the start-stop state of conventional unit i in time period t, U it =1 means running, U it =0 means shutdown, a i , b i 、c i is the coefficient of the cost function; S it is the start-u...

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Abstract

The invention relates to a multi-target generating set combination model based on security domain target and constraint and a solving method. By aiming at a problem of conventional generating set combination methods of possibility of inability of satisfying active static state security domain constraint, an improved generating set combination method is provided, and a multi-target optimization model having minimum generating costs and maximum security domain measure indexes is established. By introducing an intermediate variable, the model is in accordance with mixed integer linear optimization problem standard type. By using an expansion epsilon constraint method and optimization software CPLEX, a multi-target problem is solved, and a Pareto optimal solution set is acquired. Economic performance and safety performance are coordinated, and the multi-target generating set combination model is more suitable for actual power grid demands.

Description

technical field [0001] The invention relates to the field of operation, analysis and scheduling of electric power systems, in particular to a multi-objective unit combination model and a solution method based on safety domain objectives and constraints. Background technique [0002] The unit combination is the core part of the power generation plan, which determines the start, stop and output of the unit, which can be used to improve the economy and safety of the system. The traditional unit combination only considers the operational constraints and does not include network security constraints. In this case, optimization results may violate network security constraints. With the access of new energy with high penetration rate, the randomness and volatility of new energy bring more serious challenges to the security and stability of the system. [0003] At present, some studies have considered DC power flow, AC power flow or active power static safety domain constraints re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 林涛叶婧陈汝斯毕如玉陈宝平盛逸标杨明臻李勇徐友平徐遐龄崔晓丹李碧君石渠
Owner WUHAN UNIV
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