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A Two-Stage Robust Optimal Scheduling Method for Integrated Energy Systems

An integrated energy system and robust optimization technology, which is applied in the field of two-stage robust optimal scheduling of integrated energy systems, can solve problems such as the inability to guarantee the economic operation of integrated energy systems and the economic impact of operation, so as to reduce adverse effects and save economic costs. , the effect of improving work efficiency

Active Publication Date: 2021-05-18
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The uncertainty of load and renewable energy in the integrated energy system has brought a non-negligible impact on the stability and economy of its operation. The existing scheduling methods based on robust optimization are usually conservative, although they can be guaranteed to a certain extent. The stability of the system operation, but it has a great impact on the operation economy, and cannot guarantee the economic operation of the integrated energy system

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  • A Two-Stage Robust Optimal Scheduling Method for Integrated Energy Systems
  • A Two-Stage Robust Optimal Scheduling Method for Integrated Energy Systems
  • A Two-Stage Robust Optimal Scheduling Method for Integrated Energy Systems

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Embodiment 1

[0068] This embodiment is applied in an integrated energy system, and the structure of the integrated energy system is as follows figure 1 shown.

[0069] A two-stage robust optimal scheduling method for integrated energy systems, such as figure 2 shown, including the following steps:

[0070] S1, establish the objective function of the two-stage robust optimization scheduling model of the integrated energy system:

[0071] The objective function of the established two-stage robust optimal scheduling model for the integrated energy system is:

[0072]

[0073] Among them, t is the scheduling period; y is the decision variable of the first stage; x is the decision variable of the second stage; is the output power value of renewable energy in period t; is the outdoor temperature value in period t; U is the uncertain set of net renewable energy power; W is the uncertain set of outdoor temperature; C on-off is the cost of starting and stopping the equipment; C gas is t...

Embodiment 2

[0123] The integrated energy system of this embodiment includes a 5MW gas turbine, a 5MW gas boiler, a fan with a capacity of 1.5MW, a battery of 1MWh and a heat storage tank of 5MWh, such as image 3 As shown, the heating network of the system consists of 6 nodes, among which node 1 is connected to the CHP system, and nodes 4, 5 and 6 are respectively connected to heat loads. The operation optimization period is 24 hours. 12. The wind power prediction deviation is 0, 0.05, 0.10, 0.15, 0.20 in sequence, and the outdoor temperature prediction deviation is 0, 0.05, 0.10, 0.15, 0.20 in sequence, a total of 25 scenarios.

[0124] Among them, the operating costs of the system in each scenario are shown in Table 1. After running the steps according to the present invention, it can be seen that considering the uncertainty of wind power output and outdoor temperature increases the system operating cost by 1.0% to 8.1%, and the greater the prediction deviation, the higher the operating...

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Abstract

The patent of the present invention discloses a two-stage robust optimization scheduling method for an integrated energy system. By establishing the two-stage robust optimal scheduling objective function and constraint conditions for an integrated energy system, an uncertain set of renewable energy output and variable outdoor temperature for an integrated energy system can be established. Determine the set, use the C&CG algorithm to solve the established model, so as to realize the two-stage robust optimal scheduling method, effectively overcome the influence of renewable energy and thermal load uncertainty in the operation of the integrated energy system, and at the same time overcome The conservatism of traditional robust optimization takes into account the economy and stability of the operation of the integrated energy system to ensure the safe and efficient operation of the system.

Description

[0001] Field [0002] The invention belongs to the field of integrated energy systems, and in particular relates to a two-stage robust optimal scheduling method for integrated energy systems. Background technique [0003] The comprehensive energy system integrates multiple energy subsystems such as gas system, electric power system, and thermal system. Through cascade utilization of energy and coupling optimization of various energies, higher energy utilization efficiency and lower pollutant emissions are achieved. It can meet various energy needs such as electricity, heat, and cold, and has huge commercial value and bright application prospects. [0004] The uncertainty of load and renewable energy in the integrated energy system has brought a non-negligible impact on the stability and economy of its operation. The existing scheduling methods based on robust optimization are usually conservative, although they can be guaranteed to a certain extent. The stability of the syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06
CPCG05B13/042Y02E40/70Y04S10/50
Inventor 顾伟陆帅周苏洋吴志姚帅潘光胜吴晨雨
Owner SOUTHEAST UNIV