A method of unit combination in power system based on stochastic robust optimization

A power system and unit combination technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problem of failure to realize the combination of random models and robust models, failure to consider system security, and failure to consider new energy uncertainties, etc. question

Active Publication Date: 2020-09-25
TSINGHUA UNIV +2
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Problems solved by technology

[0004] At present, the commonly used unit combination method is mainly based on the unit combination optimization of DC power flow. The unit start-up plan is obtained by solving a deterministic mixed integer quadratic programming problem. System security under uncertainty, without considering the uncertainty of new energy sources
For example, Wang Beibei, Tang Nan, Zhao Shengnan, Lin Kaiying, Wang Yan, Xiao Yong published "A Stochastic & Adjustable Robust Hybrid Day-Ahead Scheduling Model for Demand Response Participating in Wind Power Consumption", see Proceedings of the Chinese Society for Electrical Engineering, 2017, 37(21) :6339-6346, in which the unit combination is divided into two time periods, and the stochastic model and the robust model are used for the decision-making of the start-up plan.

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  • A method of unit combination in power system based on stochastic robust optimization
  • A method of unit combination in power system based on stochastic robust optimization
  • A method of unit combination in power system based on stochastic robust optimization

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Embodiment Construction

[0075] The method for combining power system units based on stochastic robust optimization proposed by the present invention comprises the following steps:

[0076] (1) Use the time series analysis method to predict the power of the power system, and obtain the upper limit of the predicted power of wind power at all nodes of the power system at each time t The predicted power upper limit of wind power at the i-th node of the power system at time t is denoted as The lower limit of the predicted power of wind power at the i-th node at time t is denoted as t=1, 2, ... T, record the actual power of wind power at each moment in the power system as w t ,w t is a multidimensional uncertainty variable;

[0077] (2) Establish a power system unit combination model based on stochastic robust optimization. The specific process includes the following steps:

[0078] (2-1) Determine the objective function of the power system unit combination model: the goal of the power system unit c...

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Abstract

The invention relates to a power system unit combination method based on stochastic robust optimization, and belongs to the technical field of power system operation control. This method first establishes a power system unit combination model composed of objective functions and constraints; transforms the constraints to convert the original model into a nonlinear optimization problem; solves the transformed model to obtain the generator start-up plan, and according to The solution results are used to make corresponding start-up planning decisions to realize unit combination. The invention takes into account the fluctuation of renewable energy in the power system, reduces the cost of correction control, ensures the safety of the power system, and is suitable for use in scenarios such as day-ahead unit combinations in the power system.

Description

technical field [0001] The invention relates to a power system unit combination method based on stochastic robust optimization, and belongs to the technical field of power system operation control. Background technique [0002] The unit combination of the power system plays an important guiding role in the operation of the power system. It is responsible for formulating the start-up plan of the generator set, providing reference for the subsequent power generation plan, and realizing economical operation under the premise of meeting the power load and ensuring the safety of the power system. [0003] In recent years, more and more wind power has been connected to the power system, and the output of wind power is random, so it is necessary to introduce an optimization algorithm that considers uncertainty into the unit combination of the power system. [0004] At present, the commonly used unit combination method is mainly based on the unit combination optimization of DC power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46H02J3/48
CPCH02J3/46H02J3/48H02J3/003H02J2203/20
Inventor 吴文传王彬孙宏斌郭庆来杨越孙勇
Owner TSINGHUA UNIV
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