A method and system for spatio-temporal power balance of power grid
An equalization method and power technology, applied in the direction of AC network load balance, wind power generation, electrical components, etc., can solve the problems of power imbalance between distribution networks and inside, insufficient flexibility of intraday regulation, etc., to reduce calculation time and achieve results small error effect
Active Publication Date: 2022-04-26
WUHAN UNIV +1
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[0007] In view of the defects of the prior art, the purpose of the present invention is to provide a space-time power balance method and system of the power grid, aiming at solving the problems of unbalanced power between distribution networks and within it and insufficient flexibility of intraday regulation
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[0099] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0100] In order to solve the above problems, the present invention provides a space-time power balance method and system of a distribution network, so as to achieve space-time power balance between networks and within the network, and optimize operating costs.
[0101] see figure 1 , the present invention provides a kind of spatio-temporal power equalization method of power grid, comprises the following steps:
[0102] The first step is to balance the power between distribution networks in the day-ahead stage: in the day-ahead stage, considering the uncertainty of wind power output, a large nu...
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The present invention provides a space-time power balance method and system for power grids. Considering the uncertainty of wind power output in the day-ahead stage, a large number of random scenarios are generated, and an equivalent spatial power balance model between networks is established for each network, using node voltage and branch current The sensitivity to node power is to prevent the node voltage and branch current from exceeding the limit, and obtain the operating domain of the flexible multi-state switch; based on the optimization results of the flexible multi-state switch with space power balance between networks beforehand, the temporal power balance in each network is used as the basis The goal is to establish the models in each network, and obtain the operation domain of the energy storage device according to the optimization results of a large number of random scenarios; in the intraday stage, based on the flexible multi-state switch and the operation domain of the energy storage device, the electricity purchase cost and voltage from the upper power grid within the day The goal is to minimize the weighted sum of deviations to obtain the final power of each control means in each time period. Compared with the traditional control mode, the present invention can reduce the operation cost and improve the flexibility of daily control.
Description
technical field [0001] The invention belongs to the field of distribution network operation optimization, and more specifically relates to a time-space power balance method and system of a power grid. Background technique [0002] With the continuous application of renewable energy power generation, the penetration rate of renewable energy power generation in the distribution network continues to increase, while the common wind power generation is greatly affected by the weather, and its output presents uncertainty and volatility. It is difficult for the traditional distribution network to effectively deal with the uncertainty of wind power output. Therefore, various active control equipment, such as flexible multi-state switches, energy storage devices, reactive capacitor banks and reactive power compensators, have been connected to the grid to form an active distribution network. power grid. The uncertainty of wind power output exacerbates the spatial power imbalance betw...
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IPC IPC(8): H02J3/06H02J3/46H02J3/48H02J3/28H02J3/16G06Q10/06G06Q50/06
CPCH02J3/06H02J3/004H02J3/381H02J3/466H02J3/48H02J3/28H02J3/16H02J3/008H02J3/0075G06Q10/06312G06Q50/06H02J2203/10H02J2203/20H02J2300/28Y02E10/76Y02E40/30Y02E70/30
Inventor 王灿孙建军黄萌查晓明杨志淳胡成奕沈煜杨帆胡伟
Owner WUHAN UNIV