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Two-stage unit combination operation control method for large-scale systems

A unit combination and operation control technology, applied in information technology support system, power network operating system integration, single-network parallel feeding arrangement, etc. sexual effect

Active Publication Date: 2019-03-29
国家电网有限公司西南分部 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patents only use a single priority method or intelligent algorithm, or directly call a mature mathematical programming solver to solve UC problems, so they cannot solve the inherent defects of low computational efficiency when the above-mentioned methods are applied to large-scale UC problems.

Method used

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  • Two-stage unit combination operation control method for large-scale systems
  • Two-stage unit combination operation control method for large-scale systems
  • Two-stage unit combination operation control method for large-scale systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0131]In order to illustrate the effectiveness of the method, it is tested on a 24-hour system with 10 to 100 units. The relevant data of 20-100 units is obtained by copying the basic data of the 24-hour system of 10 units. The spinning reserve takes 10% of the total system load. The operating environment is: Intel Core i5 7200U, 2.8GHz, 4GB RAM, based on Matlab R2016A to solve.

[0132] The test results are compared with other typical unit combination solving methods. The comparison algorithms include: the method of combining dynamic programming and Lagrangian relaxation method, which is denoted as DPLR; the extended prioritization method, which is denoted as EPL; the improved particle swarm optimization algorithm, which is denoted as PSO; the mixed integer linear programming method, which is denoted as MILP; Benders solution method, denoted as BDM.

[0133] Table 1 and Table 2 show the detailed results of the proposed two-stage optimization method tested on a 10-machine s...

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Abstract

The invention relates to a two-stage unit combination operation control method for large-scale systems. The method includes a two-stage control process. In the first stage, the unit state is controlled by considering the rotation reserve constraint and the minimum start-stop time constraint based on the preset start-up priority of generating units. In the second stage, the optimal output of the particle swarm optimization algorithm is obtained by taking the unit state obtained in the first stage as the input of the particle swarm optimization algorithm and considering the power balance of theclimbing rate of units, and the operation state of the unit combination is controlled according to the optimal output. Compared with the prior art, the method of the invention has the advantage that the calculation efficiency and accuracy of the unit combination of a large-scale system are improved.

Description

technical field [0001] The invention relates to the field of automatic control of electric power systems, in particular to a two-stage combined operation control method for large-scale systems. Background technique [0002] The unit combination problem (UC problem) generally refers to determining the start-stop and output arrangements of each unit in each period of the research period under the constraints of system load demand, reserve capacity, and minimum start-stop time, so as to minimize the total power generation cost. The essence of the model is a high-dimensional, discrete, non-convex mixed integer nonlinear programming model, and it is not easy to obtain a theoretical optimal solution. As the scale of the system expands, the complexity of the model solution space increases, and the time to solve the model and the optimality of the solution decrease accordingly, and some methods even fail to obtain a feasible solution. Reasonable optimization of unit combination can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/48
CPCH02J3/46H02J3/48Y04S20/222
Inventor 周全魏明奎蔡绍荣路亮江栗柳璐程浩忠袁杨张程铭
Owner 国家电网有限公司西南分部