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Photovoltaic power station reactive power grouped adjustment method

An adjustment method and technology for photovoltaic power plants, which are applied in photovoltaic power generation, reactive power adjustment/elimination/compensation, reactive power compensation, etc., and can solve problems such as increased computational complexity.

Active Publication Date: 2015-11-11
XUCHANG XJ SOFTWARE TECH +3
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Problems solved by technology

[0004] The purpose of the present invention is to provide a reactive power group adjustment method for photovoltaic power plants to solve the problem of greatly increasing computational complexity as the system scale increases in the current reactive power adjustment of photovoltaic power plants

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  • Photovoltaic power station reactive power grouped adjustment method
  • Photovoltaic power station reactive power grouped adjustment method
  • Photovoltaic power station reactive power grouped adjustment method

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Embodiment Construction

[0037] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0038] The present invention first uses the cluster analysis method to group the load nodes based on the electrical distance between the load nodes; then considers the correlation between the output of photovoltaic power generation and the load to merge and calculate the power generation units in the station, thereby forming different power generation nodes, so that The overall output of the system can track the local load to the greatest extent; use the hierarchical multi-particle swarm optimization algorithm to solve the reactive power target value of each power generation node, and send the solved reactive power target value to each power generation node Inverter, to realize the optimal adjustment of the whole station of the photovoltaic power station. The implementation process of this method is as follows figure 1 As shown, the specifi...

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Abstract

The invention relates to a photovoltaic power station reactive power grouped adjustment method. The method includes the following steps that: load nodes are grouped; merging calculation is performed on power generation units in a station according to the correlation of generated power output and load, so that different power generation nodes can be formed, and the overall output of a system can track local load to the greatest extent; an objective function is built through adopting a multi-objective reactive power optimization algorithm, and the reactive target values of the power generation nodes are calculated through utilizing a hierarchical multi-particle swarm optimization algorithm, and reactive power adjustment instructions Qrefi to be distributed of the power generation nodes are calculated; and the reactive power adjustment instructions Qrefi to be distributed of the power generation nodes are distributed, and reactive power instructions Qrevi or power factor instructions cos theta invi of inverters are calculated according to the number of turned-on inverters in the inverters and the current operation states of the inverters under the power generation nodes, and the reactive power instructions Qrevi or power factor instructions cos theta invi of the inverters are transmitted to corresponding inverters. With the method adopted, the dimensionality and complexity of system optimization variables can be decreased, and the generation of a large number of invalid solutions can be avoided, and therefore, the accuracy and speed of reactive power distribution of the inverters can be improved.

Description

technical field [0001] The invention relates to a reactive power grouping adjustment method of a photovoltaic power station, which belongs to the technical field of distributed power source control. Background technique [0002] Distributed energy generation is one of the important measures to solve the current energy shortage and environmental pollution. However, with the large-scale access of distributed energy generation to the power grid, the randomness, intermittency and volatility of distributed power generation have brought some negative effects on the safe and stable operation of the power grid, and the reactive power regulation can significantly reduce the power consumption. It is of great significance to ensure the safe and stable operation of the power grid to reduce losses and improve the quality of system voltage. [0003] At present, traditional reactive power partitioning methods mainly include graph theory method, sensitivity method, and artificial intellige...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/46
CPCY02E10/56Y02E40/30
Inventor 陶颍军孔波利崔丽艳沈志广李现伟樊鹏吴双惠孙航飞陈斌张秀娟段太钢高建琨胡叶宾李燕熊焰
Owner XUCHANG XJ SOFTWARE TECH
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