Distributed photovoltaic optimal configuration method based on two-stage planning

Abstract

A distributed photovoltaic optimal configuration method based on two-stage planning comprises the following steps of firstly, establishing a photovoltaic power generation random output model, and then implementing the operations at the following two stages that at the first stage, the network loss sensitivity variance of each node in a power distribution network is calculated through a network loss sensitivity variance method; the network loss sensitivity variance values are compared and analyzed, the access sequence of the distributed photovoltaic at each node is judged, and the distributed photovoltaic capacity and an initial mounting position are calculated; and at the second stage, the distributed photovoltaic capacity and the initial mounting position serve as input of the second stage, a target function is established with the minimum annual investment and operation cost, the minimum voltage deviation and the minimum power distribution network loss generated after the distributed photovoltaic is connected into the power distribution network as targets, and finally an optimal configuration scheme is obtained. The configuration scheme obtained through the method can stabilize the photovoltaic output power fluctuation and improve the photovoltaic permeability and utilization rate and the absorption capacity of photovoltaic power generation.

Description

technical field [0001] This application relates to the field of new energy grid-connected technologies, and in particular to a distributed photovoltaic optimal configuration method based on two-stage planning. Background technique [0002] Nowadays, the traditional electric power industry is facing huge environmental protection pressure. Under the trend of sustainable development of new energy, distributed power generation technology is more and more widely used. However, the unreasonable configuration of a large number of distributed photovoltaics will cause many problems such as increased network losses of the distribution network and node voltage over-limits, which will affect the safe and stable operation of the distribution network. [0003] In the prior art, different objective functions are established according to the different impacts of distributed photovoltaics being connected to the distribution network. For example, take the minimum comprehensive cost as the ob...

AI Technical Summary

Problems solved by technology

However, the unreasonable configuration of a large number of distributed photovoltaics will cause many problems such as increased network losses of the distribution network and node voltage over-limits, which will affect the safe and stable operation of the distribution network.

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