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An Interval Power Flow Calculation Method for Electric-Heat Interconnected Integrated Energy System

A technology that integrates energy systems and interval power flow. It is applied in the field of interval power flow calculation. It can solve problems such as large computational complexity, poor numerical stability of local optimal solutions, and expansion of interval solution sets, to achieve the effect of overcoming conservatism.

Active Publication Date: 2022-01-14
NARI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most representative method of power system interval power flow calculation is the interval algorithm, but the interval iterative algorithm will encounter the problem of interval solution set expansion during the interval operation process, which will lead to poor numerical stability of the local optimal solution and computational complexity. Too big and other issues

Method used

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  • An Interval Power Flow Calculation Method for Electric-Heat Interconnected Integrated Energy System

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Embodiment Construction

[0067] This embodiment provides an interval power flow calculation method for an electricity-heat interconnected integrated energy system, including the following steps:

[0068] (1) Obtain the information of the electricity-heat interconnection comprehensive energy system, and establish the electricity-heat interconnection comprehensive energy system model according to the information. The specific model is as follows:

[0069]

[0070]

[0071] Am=m q (3)

[0072] Bh f =0 (4)

[0073] h f =Km|m| (5)

[0074]

[0075]

[0076]

[0077] Φ=C p m q (T s -T o ) (9)

[0078]

[0079] (∑m out ) T out =∑(m in T in ) (11)

[0080] C m = Φ CHP / P CHP (12)

[0081] C z =ΔΦ / ΔP=Φ CHP / (η e f in -P CHP ) (13)

[0082]

[0083]

[0084] In the formula: P i , Q i are the injected active and reactive power of node i respectively, θ ij = θ i -θ j , U i , θ i are the voltage and phase angle of node i respectively, U j , θ j are the vo...

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Abstract

The invention discloses an interval power flow calculation method for an electricity-heat interconnection integrated energy system, including: (1) obtaining information about the electricity-heat interconnection integrated energy system, and establishing an electricity-heat interconnection integrated energy system model according to the information; 2) converting the pipeline pressure drop equation in the system model into a quadratic function of flow m; (3) calculating the iterative initial value of the state variable according to the electric-thermal interconnection comprehensive energy system model; (4) according to The iterative initial value of the state variable and the unary quadratic function of the flow rate m, utilize the linear optimization method to iteratively solve the upper and lower limits of the state variable in turn; (5) form the upper and lower limits of the state variable into an interval, and perform as an interval power flow solution output. The invention has small computational complexity and overcomes the conservatism of interval solutions.

Description

technical field [0001] The invention relates to the field of operation scheduling and control of an integrated energy system, in particular to an interval power flow calculation method for an electric-thermal interconnected integrated energy system. Background technique [0002] With the continuous development of society, the shortage of fossil energy and environmental pollution cannot be ignored. In order to alleviate the problems, the Energy Internet came into being. Energy Internet can cover energy systems such as power supply, gas supply, heating, cooling, hydrogen supply and electrified transportation. Among them, with the gradual application of combined heat and power units, the current development of combined heat and power network is the fastest. [0003] With the gradual integration of distributed renewable energy, the uncertain factors of the power system and thermal system increase. When the system injection power fluctuates within a certain range, the power flow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06H02J3/06
CPCH02J3/06G06Q10/06312G06Q50/06H02J2203/20
Inventor 滕贤亮杜刚吴仕强王文学卫志农孙国强臧海祥陈胜
Owner NARI TECH CO LTD
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