Virtual power plant topology optimization method and device
A technology of virtual power plant and topology optimization, applied in virtual/augmented reality, design optimization/simulation, electrical digital data processing, etc., can solve the problem that the network structure cannot always meet the requirements of economy
Inactive Publication Date: 2021-06-18
ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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At the same time, due to frequent changes in the internal power flow of the virtual power plant, the original network structure cannot always meet the economical requirements. It is necessary to adjust the network topology in real time under different power generation load conditions, and reduce the network topology within the virtual power plant. loss is of great significance
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[0061] The optimal matching loop flow algorithm is a kind of network reconstruction problem that can be transformed into a series of linear circuit problems. This method can use a virtual loop current to simulate the load transfer between tie switches. This virtual loop current is called the optimal matching loop current of the radial network. For example, the typical structure of a virtual power plant is as follows figure 1 As shown in , the grid connection point of the virtual power plant is the boundary between the virtual power plant and the transmission grid. Inside the virtual power plant, there may be loads, energy storage, charging piles and photovoltaic power generation equipment under each node. As the generation and load on each device changes over time, the power flow through the switch also changes over time. Such as figure 1As shown, the switch 3 is in the closed position. At the same time, the load current of each node is fixed. Opening the switch 3 is equiv...
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The invention discloses a topological optimization method and device for a virtual power plant. The topological optimization method comprises the steps of switching on all interconnection switches in the virtual power plant; calculating an optimal matching loop flow of each loop in the virtual power plant; calculating the residual current of the branch with the minimum current on each loop according to the optimal matching loop flow; and if the residual current in the kth loop is smaller than the optimal matching loop flow, opening the interconnection switch with the minimum residual current after current compensation on the kth loop until all the loops are traversed, thereby determining the closed states of all the interconnection switches in the virtual power plant. According to the invention, under the condition that the internal power flow of the virtual power plant changes, the virtual power plant can obtain the minimum network loss through switch adjustment, so that the operation economy of the virtual power plant is improved.
Description
technical field [0001] The present application relates to the technical field of virtual power plants, in particular to a topology optimization method and device for a virtual power plant. Background technique [0002] The distribution network of modern cities develops rapidly, and the network structure tends to be complicated. With the continuous increase of urban electricity load, the day-night peak-to-valley difference of distribution network load continues to increase. It is difficult to meet the economic operation requirements of the distribution network by relying on the traditional power regulation of the power generation side. With the application of the concept of virtual power plant, more generators, loads, charging piles, energy storage and other equipment inside the virtual power plant are used to meet the energy demand, frequency regulation demand and backup demand of the large power grid. At the same time, due to frequent changes in the internal power flow of...
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IPC IPC(8): G06F30/18G06F30/20G06F111/18G06F113/04
CPCG06F30/18G06F30/20G06F2111/18G06F2113/04
Inventor 洪毅文李宾潘斌陈旗展方嵩钟毅杨涌新余俊杰刘劲阮志杰
Owner ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID