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A stochastic optimization method for unit output and topology in AC/DC systems

A technology of AC-DC system and topology structure, which is applied in the field of stochastic optimization of unit output and topology of AC-DC system, which can solve problems such as long solution time and difficult solution, so as to reduce the difficulty of solution, solve efficiently and speed up the solution Effect

Active Publication Date: 2022-05-24
HUNAN UNIV
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Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention provides a high-efficiency stochastic optimization method for unit output and topology of AC / DC systems, which overcomes the long solution time and time-consuming problem of traditional algorithms for joint optimization of unit output and topology. Difficulty and other issues

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  • A stochastic optimization method for unit output and topology in AC/DC systems
  • A stochastic optimization method for unit output and topology in AC/DC systems
  • A stochastic optimization method for unit output and topology in AC/DC systems

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Embodiment Construction

[0055] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0056] like figure 1 As shown, the steps of the random optimization method for the output and topology structure of AC / DC system units in this embodiment include:

[0057] S1. Build an optimization model, take the total power generation cost of the AC / DC power system with a voltage source converter station under normal conditions as the objective function, and the constraints include the linear power flow model of the AC subsystem, considering V 2 -P droop control of the DC subsystem linear power flow model, the constraints related to the transmission power of the voltage source converter station, and the transmission capacity of the AC and DC branches, the transmission capacity of the voltage source converter station, the active power output range of the thermal ...

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Abstract

The invention discloses a stochastic optimization method for output and topology of AC / DC system units, the steps include: S1. constructing an optimization model; S2. setting the state of all branch switches in the optimization model to a closed state; S3. setting step S2 The optimized model obtained after processing is decomposed into multiple sub-models, and each sub-model contains only one N-1 fault or does not contain any faults; S4. Solve each sub-model separately to obtain the solution result of the first-stage optimized model; S5. According to the solution results of each sub-optimization model, the effective switch set is obtained; S6. In the optimization model constructed in step S1, the state of the remaining switches other than the effective switch is set to the closed state, and the second-stage optimization model is obtained; S7. Solve the second The stage optimization model is used to obtain the final joint optimization results of topology structure and unit output. The invention can efficiently optimize the unit output and topology of the AC and DC system at the same time, and has the advantages of high calculation efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of AC / DC hybrid power systems, in particular to a stochastic optimization method for the output and topology structure of AC / DC systems. Background technique [0002] With the advancement and rapid development of voltage source converter station (VSC) technology, multi-terminal flexible DC transmission systems have received more and more attention and applications in the field of power systems including offshore wind power (Gang Shi, Guoxiang Wu, XuCai, Zhe Chen. Coordinated control of multi-terminal VSC-HVDC transmission for large offshore wind farms. Proceedings of The 7th International Power Electronics and Motion Control Conference, 2012). Comprehensively considering VSC fast control and grid topology optimization operation scheduling can effectively improve the economy of AC and DC systems and the ability to correct and control after faults. However, topology optimization will bring huge challenges to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06Q50/06G06F111/04G06F111/06
CPCG06F30/20G06Q50/06G06F2111/04G06F2111/06
Inventor 谭益廖长风李勇曹一家
Owner HUNAN UNIV
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