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A partition method and device for a distributed photovoltaic distribution network

A distributed photovoltaic and distribution network technology, applied in the direction of circuit devices, photovoltaic power generation, electrical components, etc., can solve problems such as unreasonable partition results

Inactive Publication Date: 2021-10-08
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0004] This application provides a partitioning method and device for a distributed photovoltaic distribution network, which is used to solve the existing technology that only considers the topological structure of the distribution network, that is, whether the nodes in the network are connected, resulting in unreasonable partitioning results question

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  • A partition method and device for a distributed photovoltaic distribution network
  • A partition method and device for a distributed photovoltaic distribution network
  • A partition method and device for a distributed photovoltaic distribution network

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Embodiment Construction

[0047] The overvoltage caused by the high penetration of photovoltaic inverters is a prominent factor that limits the access of photovoltaic inverters to the distribution network. The use of photovoltaic inverters for active power reduction and reactive power compensation is the two main methods to solve the overvoltage problem . However, due to the decentralized nature of the distributed photovoltaic distribution network, it is very time-consuming to process the entire distribution network as a whole. If the number of nodes is too large, the calculation efficiency will be low. Currently, the entire distributed photovoltaic distribution network The grid is partitioned and can be used for voltage regulation in multi-node systems. However, the existing fast-newman algorithm is used to partition the entire distributed power system to uniformly adjust all inverters connected to the distributed photovoltaic power source. Due to the use of the traditional fast-newman algorithm, the ...

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Abstract

This application discloses a method and device for partitioning a distributed photovoltaic distribution network. The average sensitivity of the voltage change of each sub-community to the change of active power or reactive power is calculated by the average sensitivity formula, and the photovoltaic inverse is calculated by the position matrix formula. In the end, the improved modularity of each sub-community is calculated by the improved modularity formula, and all sub-communities of the distributed photovoltaic distribution network are partitioned according to the improved modularity, so that the partition result of the power system is not only Considering the network topology, the sensitivity of active / reactive power to voltage regulation and the access location of photovoltaic inverters are also considered, thus solving the existing topology that only considers the power distribution network, that is, the It is a technical problem that the partition result is unreasonable due to whether the nodes are connected.

Description

technical field [0001] The present application relates to the technical field of photovoltaic power generation, and in particular to a partitioning method and device for a distributed photovoltaic power distribution network. Background technique [0002] With the rise of the new energy power generation industry, a large number of distributed power generation systems are connected to the power distribution network. In recent years, as the scale of user-side distributed photovoltaics has become larger and larger, and the proportion of installed capacity has become higher and higher, distributed photovoltaics across the country have shown increased scale, more power distribution points, scattered grid connection points, high penetration rates, and wide regulation. The single distribution network becomes a multi-power supply structure and other characteristics. [0003] Among them, the overvoltage caused by the high penetration of photovoltaic inverters (PV) is the main factor ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00Y02E10/56
Inventor 郑晓莹陈政轩殷豪
Owner GUANGDONG UNIV OF TECH
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