A method of cascade power station peak regulation based on stochastic continuous optimization strategy

A cascade power station and optimal strategy technology, applied in the fields of electrical digital data processing, instruments, calculations, etc., can solve problems such as the dimension of decision variables with limited solution efficiency, the range of optimization space, and low solution efficiency, and simplify the constraint processing process , reasonable optimization space, and the effect of reducing the dimension of decision variables

Active Publication Date: 2018-09-21
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, mathematical programming methods are usually difficult to deal with complex constraints with a high degree of coupling, and are prone to the "curse of dimensionality" problem. Although the model can be reduced in dimension by using step-by-step optimization techniques, the solution accuracy of traditional successive optimization algorithms strongly depends on Discrete precision of decision variables, reservoir group size and constraint coupling degree, the resulting problem of low solution efficiency limits its application in short-term joint peak-shaving scheduling of large-scale hydropower stations
Although the intelligent algorithm has been successfully applied in reservoir scheduling, its solution efficiency is also limited by the dimension of decision variables and the scope of optimization space, and it is easy to fall into premature and local convergence.

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  • A method of cascade power station peak regulation based on stochastic continuous optimization strategy
  • A method of cascade power station peak regulation based on stochastic continuous optimization strategy
  • A method of cascade power station peak regulation based on stochastic continuous optimization strategy

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[0048] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0049] The present invention takes the Yuanshui cascade directly regulated by the Central China Power Grid as an embodiment, according to the figure 1 As shown in the step-by-step optimization algorithm of the stochastic continuous optimization strategy, the process flow of the peak regulation method of the cascade power station is carried out to simulate the peak regulation of the cascade power st...

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Abstract

The invention discloses a cascade hydropower station peak regulating method based on a random continuous optimization strategy. The cascade hydropower station peak regulating method comprises the following steps: (1) generating an initial solution, selecting water levels in front of a dam from hydropower stations from upstream to downstream as discrete state quantities; taking a minimum power grid residual load mean square error as a target to carry out single reservoir peak regulating optimization calculation; (2) randomly and continuously carrying out optimized search step by step; and (3) updating iteration judgment: if reaching the tail of a time period, finishing a regulating process when a stopping condition of a successive optimization algorithm is reached, and outputting a final result, if the stopping condition of the successive optimization algorithm is not reached, setting a time period number to be a starting time period and turning into the step (2) to carry out the next time of iteration optimization, and if not reaching the tail of the time period, adding one to the time period number and turning into the step (2) to carry out two-phase regulation of the next time period. With the adoption of a constraint handling method provided by the invention, complicated cascade hydropower station coupling operation constraint of the cascade hydropower stations can be completely decoupled, and a constraint handling process of the algorithm is simplified; and a decision-making variable dimension is reduced, a reasonable optimization space is found and the method is suitable for solving a peak regulating problem of a large-scale cascade hydropower station group.

Description

technical field [0001] The invention belongs to the field of optimal operation of hydropower energy and optimal scheduling of power generation in power systems, in particular to a peak regulation method for cascade power stations based on a random continuous optimization strategy. Background technique [0002] The short-term peak shaving problem of cascade hydropower stations has the characteristics of multi-dimensional time and space, complex hydraulic and electrical connections between reservoir groups, and huge optimization space. It is a typical large-scale nonlinear programming problem with multiple decision variables, high dimensions and multiple constraints. For the solution of such problem models, conventional mathematical programming methods and intelligent algorithms are currently mostly used. However, the mathematical programming method is usually difficult to deal with complex constraints with high coupling degree, and is prone to the problem of "dimension disast...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00
Inventor 周建中莫莉孙怀卫曾小凡陈璐闫宝伟严冬覃晖刘懿李远征蒋志强张诚袁柳王超卢鹏乔祺欧阳文宇汪洋常楚阳吴巍刘伟李远哲
Owner HUAZHONG UNIV OF SCI & TECH
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