Dynamic equivalent modeling method for cluster of distributed photovoltaic power stations

Abstract

The invention discloses a dynamic equivalent modeling method for the cluster of distributed photovoltaic power stations and belongs to the technical field of distributed energy grid-connected modelingand simulation. According to the method, an electric quantity waveform capable of accurately describing the dynamic characteristics of photovoltaic power stations can be selected as a clustering index, and a dynamic time bending distance among the similar clustering indexes of all photovoltaic power stations serves as the measurement of clustering. After that, according to a clustering result, the aggregation equivalent parameters of photovoltaic power stations of the same cluster are calculated, and the equivalent simplification of the power distribution network is carried out. In this way,not only the dynamic similarity among photovoltaic power stations can be accurately captured, but also the model complexity can be greatly reduced. Meanwhile, the simulation calculation time can be greatly shortened.

Description

technical field [0001] The invention discloses a dynamic equivalent modeling method for distributed photovoltaic power station clusters, and belongs to the technical field of distributed energy grid-connected modeling and simulation. Background technique [0002] Compared with traditional fossil energy, photovoltaic power generation has the advantages of rich resources, renewable and pollution-free, so the photovoltaic industry has developed rapidly in recent years. According to the data released by the International Energy Agency (IEA), in 2015, the newly installed photovoltaic capacity in the world was close to 50GW, an increase of 25% compared with 2014, and the global cumulative installed capacity was about 230GW. Among them, China, Japan and the United States were the largest markets, accounting for About two-thirds of the new installed capacity. It is estimated that by 2050, photovoltaic power generation will account for 16% of the world's total electricity consumptio...

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Problems solved by technology

[0005] The purpose of the present invention is to address the shortcomings of the above-mentioned background technology and provide a dynamic equivalent modeling method for distributed photovoltaic power station clusters, which can perform dynamic equivalent modeling on photovoltaic cluster systems, simplifying the complexity of detailed models, reducing It solves the problem that detailed modeling of each power station in the cluster increases the complexity of the simulation model and consumes a lot of time and energy in the data preparation phase and model simulation calculation phase. technical problem

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