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A two-stage unit combined operation control method suitable for large-scale systems

A technology of unit combination and operation control, applied in the direction of information technology support system, power network operating system integration, single network parallel feeding arrangement, etc. Accuracy, quality-enhancing effects

Active Publication Date: 2022-07-12
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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  • A two-stage unit combined operation control method suitable for large-scale systems
  • A two-stage unit combined operation control method suitable for large-scale systems
  • A two-stage unit combined operation control method suitable for large-scale systems

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Experimental program
Comparison scheme
Effect test

Embodiment

[0131]In order to demonstrate the effectiveness of the method, the system is tested on 10-100 units in 24 time periods. The relevant data of 20-100 units is obtained by copying the basic data of the system of 10 units and 24 time periods. 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 solution.

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

[0133] Tables 1 and 2 show the detailed results of the proposed two-stage optimization method tested in a 10-machine system, where a is 0.3. Table 3 shows the power generation cost of ...

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Abstract

The invention relates to a two-stage unit combination operation control method suitable for large-scale systems. The method includes a two-stage control process: in the first stage, based on a preset power-on priority order of generator sets, rotating reserve constraints and minimum start-up constraints are considered at the same time. The downtime constraint controls the unit state; in the second stage, the unit state obtained in the first stage is used as the input of the particle swarm algorithm, and the power balance of the unit ramp rate is considered to obtain the optimal output of the particle swarm algorithm. According to the optimal output Control the operating status of the unit combination. Compared with the prior art, the invention has the advantages of improving the calculation efficiency and calculation accuracy of the large-scale system unit combination.

Description

technical field [0001] The invention relates to the field of automatic control of electric power systems, in particular to a combined operation control method of two-stage units suitable for large-scale systems. Background technique [0002] The unit combination problem (UC problem) generally refers to determining the start-stop and output arrangement of each unit in each period of the research period under the constraints of satisfying the 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 the theoretical optimal solution. With the expansion of the system scale, the complexity of the model solution space increases, the model solution time and the optimality of the solution decrease, and some methods cannot even obtain feasible solutions. Reasonable optimization of the u...

Claims

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Application Information

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Patent Type & Authority Patents(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