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Abnormality detection method and device for inverter in photovoltaic power station

A photovoltaic power station and anomaly detection technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve problems such as inability to detect inverter efficiency, and achieve the effect of improving operation and maintenance efficiency

Inactive Publication Date: 2018-01-16
XINJIANG GOLDWIND SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for abnormal detection of inverters in photovoltaic power plants, so as to solve the problem that the prior art cannot timely and effectively detect the efficiency of inverters in photovoltaic power plants, predict their status and give early warning

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  • Abnormality detection method and device for inverter in photovoltaic power station
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  • Abnormality detection method and device for inverter in photovoltaic power station

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Embodiment 1

[0016] refer to figure 1 , shows a flow chart of steps of a method for detecting abnormality of an inverter in a photovoltaic power plant according to Embodiment 1 of the present invention.

[0017] The abnormality detection method of the inverter in the photovoltaic power station of this embodiment includes the following steps:

[0018] Step S102: Obtain the conditional irradiance corresponding to the inverter in the photovoltaic power plant and the measured output power of the inverter under the conditional irradiance.

[0019] Wherein, the conditional irradiance corresponding to the inverter can be obtained by referring to the irradiance of equipment in other photovoltaic power plants located in the same geographical area as the inverter, including but not limited to, obtaining through the irradiance of a photometry tower.

[0020] The measured output power of the inverter under the conditional irradiance indicates the actual output power of the inverter under a certain ir...

Embodiment 2

[0028] refer to figure 2 , shows a flow chart of steps of a method for detecting abnormality of an inverter in a photovoltaic power plant according to Embodiment 2 of the present invention.

[0029] The abnormality detection method of the inverter in the photovoltaic power station of this embodiment can be executed by the control system in the photovoltaic power station, and the control system can provide a flexible platform for the following functions, and the functions include: power station devices of multiple photovoltaic power stations Perform real-time power control, supervisory control functions for PV plant operations and for non-time-critical control capabilities, and data acquisition functions for monitoring PV plant performance and for supporting operations and maintenance. But not limited thereto, those skilled in the art should understand that in practical applications, any other suitable device that can implement the method for detecting abnormality of an invert...

Embodiment 3

[0053] refer to image 3 , shows a flow chart of steps of a method for detecting abnormality of an inverter in a photovoltaic power plant according to Embodiment 3 of the present invention.

[0054] This embodiment uses a specific example to illustrate the abnormality detection method of the inverter in the photovoltaic power station provided by the embodiment of the present invention.

[0055] The abnormality detection method of the inverter in the photovoltaic power station of this embodiment includes the following steps:

[0056] Step S302: Collect detection data of the inverter to be detected in the photovoltaic power station.

[0057] Among them, the inverters to be detected include one or more inverters. In this embodiment, only one inverter is used as an example for illustration, but those skilled in the art should understand that for the situation of multiple inverters, each of them All stations can perform corresponding anomaly detection with reference to this embod...

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Abstract

The embodiment of the invention provides an abnormality detection method and device for an inverter in a photovoltaic power station, and the method comprises the steps: obtaining the corresponding conditional irradiance of the inverter in the photovoltaic power station and the measurement output power of the inverter under the condition of the conditional irradiance; judging whether the differencebetween the measurement output power of the inverter and the theoretical output power of the inverter under the condition of the conditional irradiance is greater than a set threshold value or not; and generating early warning information for indicating the abnormality of the inverter if the difference is greater than the set threshold value. According to the embodiment of the invention, the method achieves the timely and effective efficiency detection of the inverter in the photovoltaic power station, achieves the prediction and early warning of the state of the inverter, and greatly improves the operation and maintenance efficiency of the photovoltaic power station.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a method and device for abnormality detection of an inverter in a photovoltaic power station. Background technique [0002] With the depletion of traditional energy and the continuous development of social economy, renewable resources have become particularly important. Among them, solar energy, as an important part of renewable resources, can be effectively utilized through photovoltaic power generation, thus photovoltaic power plants came into being. [0003] A photovoltaic power station is a power generation system composed of solar energy, inverters, and electronic components made of special materials such as crystalline silicon plates. In a photovoltaic power station, photovoltaic modules and inverters are important components. Usually, each photovoltaic module is equipped with several inverters. With the large-scale development of photovoltaic power ...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 丁胜涛王成魏后艳
Owner XINJIANG GOLDWIND SCI & TECH
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