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Diagnosis algorithm for low-voltage photovoltaic power generation fault

A technology of photovoltaic power generation and diagnostic algorithms, applied in the field of diagnostic algorithms, can solve the problems of high cost and low accuracy of diagnostic algorithms, and achieve the effects of localized utilization, good power and voltage regulation characteristics, and reduced network loss

Active Publication Date: 2021-10-19
HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD +1
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the technical problem of high cost and low precision of existing diagnostic algorithms for photovoltaic power generation faults

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  • Diagnosis algorithm for low-voltage photovoltaic power generation fault
  • Diagnosis algorithm for low-voltage photovoltaic power generation fault
  • Diagnosis algorithm for low-voltage photovoltaic power generation fault

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Embodiment Construction

[0069] The specific embodiments of the present invention will be further specifically described below through specific embodiments in conjunction with the accompanying drawings.

[0070] like figure 1 As shown in the flowchart, the present invention provides a diagnostic algorithm for low-voltage photovoltaic power generation faults, including the following steps:

[0071] Step 1: Use the current electricity consumption information collection system platform to collect real-time data of low-voltage station areas in real time;

[0072] Step 2: Perform principal component analysis on the input data obtained in Step 1;

[0073] Step 3: Obtain the voltage, current and power data of each node in the station area through power flow calculation; the specific execution method is Step 31: read in the original user electrical data and topological connection relationship data, and read in the power point data;

[0074] Step 32: Calculate the power of the backbone nodes connected to sin...

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Abstract

The invention provides a diagnosis algorithm for a low-voltage photovoltaic power generation fault. The algorithm comprises the following steps of collecting the real-time data of a low-voltage transformer area in real time through a current power utilization information collection system platform, performing principal component analysis processing on the input acquisition data, acquiring voltage, current and power data of each node in the transformer area through load flow calculation, establishing an analog simulation model, carrying out distributed photovoltaic correlation analysis and severity evaluation on the voltage and the line loss of the real power distribution network and the running state of the power distribution transformer so as to provide corresponding countermeasures, 6, comparing load flow calculation results in four scenes of no fault, aging, local shadow and short circuit, and analyzing operation states of the transformer area power distribution network in the four scenes, and 7, trying to provide a solution based on a reactive power compensation device, a three-phase balancing device, a photovoltaic system with reactive power compensation and a centralized energy storage device on the transformer side of the transformer area. The technical problem that an existing photovoltaic power generation fault diagnosis algorithm is high in cost and low in accuracy is solved.

Description

technical field [0001] The invention relates to a diagnostic algorithm, in particular to a diagnostic algorithm for low-voltage photovoltaic power generation faults. Background technique [0002] In the 21st century, conventional energy is very limited, especially in China, where China's primary energy reserves are far below the world's average level, only about 10% of the world's total reserves. Moreover, with the advent of energy crises and the intensification of the greenhouse effect, people are increasingly aware of the importance of clean energy. Therefore, in China, photovoltaic power generation as a clean and renewable energy has attracted more and more attention. It is estimated that by 2020, my country's The annual output of photovoltaic industry can reach 270 million square meters. [0003] Compared with traditional energy power generation, photovoltaic power generation has more advantages: its cost is low, it does not need to build large-scale projects, and it doe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S50/00
CPCH02S50/00Y02E10/50
Inventor 龚超崔屹王伟康俞宙杰张靓冷张圆张吉善余畅何一帆
Owner HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD
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