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Gas-electrically interconnect integrated energy system unit combination method

An integrated energy system and unit combination technology, applied in the field of gas-electric interconnection integrated energy system unit combination, can solve the gas load uncertainty, affect the stability, reliability of the integrated energy system, wind power, electricity load uncertainty, etc. question

Active Publication Date: 2019-01-04
NANJING NORMAL UNIVERSITY
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Problems solved by technology

[0004] However, there are many uncertainties in the integrated energy system of gas-electricity interconnection, not only the uncertainty of wind power and electric load, but also the uncertainty of gas load. These uncertain factors will affect the operation of the integrated energy system. stability, reliability

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Embodiment Construction

[0069] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0070] Such as figure 1 As shown, the unit combination method of the gas-electric interconnected integrated energy system designed by the present invention mainly includes two parts: the construction of multiple scenarios of uncertain factors and the determination of the unit combination of the gas-electric interconnected integrated energy system.

[0071] (1) Construct multiple scenarios of uncertain factors

[0072] Assuming that wind power, electricity load and gas load conform to the normal distribution, Latin hypercube sampling is adopted, the sampling size is n, the number of random variables in the uncertainty factor is z, and the sample is expressed as X=[x 1 ,.x 2 ,...,x z ], then the i-th sample X i =[x i1 ,.x i2 ,...,.x iz ], i=1,2,...,n.

[0073] In order to reduce the number of scenes and improve efficiency, the equivalent load (that is...

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Abstract

The invention discloses a gas-electrically-interconnected integrate energy system unit commitment method, comprising construct multiple scenarios of uncertainties and determining two parts of the unitcombination of the gas-electrically-interconnected integrated energy system with electrical interconnection; Considering the uncertainty of electric load and wind power load and the uncertainty of gas load simultaneously, a large number of scenes are generated based on Latin hypercube sampling method, and the number of scenes is obtained by scene reduction. determines that the combination of thegas-electrically interconnected integrated energy system takes the economic optimization as the optimization objective, determines the constraints of electric power network, natural gas network and the coupling relationship between them, establishes the stochastic programming model, and solves to obtain Optimal unit combination in the gas-electrically interconnected integrated energy system. The invention can deal with the uncertainty of gas load, electric load and wind power in the integrated energy system through the random programming method, thereby determining the unit combination and improving the system operation economy.

Description

Technical field [0001] The invention belongs to the technical field of electric power information, and particularly relates to a unit combination method of a gas-electric interconnected integrated energy system. Background technique [0002] With the shortage of fossil energy and environmental pollution, natural gas is quickly becoming the best choice for new generators in the power grid. In the gas-electric interconnected integrated energy system, the integrated energy utilization system unit is the traditional coupling element of the power system and the natural gas system, which can reduce the investment cost and operating cost of system planning while improving the reliability of the system. [0003] Unit commitment refers to the ability to reasonably arrange the start and stop status of the unit and adjust the output of each unit under the condition of meeting the operation constraints of the unit during the dispatch cycle, so as to achieve the goal of optimal economy. The op...

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Application Information

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IPC IPC(8): H02J3/46
CPCH02J3/46H02J2203/20Y02E10/76
Inventor 包宇庆陈培培周雪婷武媚祝雪妹
Owner NANJING NORMAL UNIVERSITY
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