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A photovoltaic power plant operating state identification method based on the characteristic parameters of power loss

A technology of operating status and photovoltaic power plants, applied in the direction of electrical digital data processing, special data processing applications, data processing applications, etc., can solve problems such as poor real-time performance, heavy workload, and inability to ensure stable and reliable operation of photovoltaic power plants, and achieve reduction Monitoring Workload Effects

Active Publication Date: 2017-10-24
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Application Information

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Problems solved by technology

[0004] At present, most photovoltaic power plants use manual inspection to monitor scattered photovoltaic power generation units. This traditional monitoring method not only has a huge workload and poor real-time performance, it is difficult to detect system failures in time, and cannot guarantee the stable and reliable operation of photovoltaic power plants.

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  • A photovoltaic power plant operating state identification method based on the characteristic parameters of power loss
  • A photovoltaic power plant operating state identification method based on the characteristic parameters of power loss
  • A photovoltaic power plant operating state identification method based on the characteristic parameters of power loss

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Embodiment Construction

[0040]The principles and features of the present invention will be described below in conjunction with the accompanying drawings, and the examples given are only for explaining the present invention, and are not intended to limit the protection scope of the present invention.

[0041] Taking 5 photovoltaic power generation units (numbered #1-#5) in a certain area of ​​a photovoltaic power plant as the research object, the historical operation data in 2011 were obtained through the EMS system, and the data sampling interval was 1 minute. 10:00-14:00, September 3, 2011, No. 1 power generation unit (#1), 13:00-16:00, October 18, 2011, No. 5 power generation unit (#5), November 2011 The actual operating status of No. 2 power generation unit (#2) from 9:13 to 11:00 on the 7th and No. 4 power generation unit (#4) from 12:00 to 14:00 on December 24, 2011 is the test sample set.

[0042] The identification method includes the following steps:

[0043] Step 1: Obtain the output power ...

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Abstract

A method for identifying running states of a photovoltaic power station on the basis of electric quantity loss feature parameters comprises the following steps of firstly, performing calculation to obtain electric quantity loss information of various generation units of the photovoltaic power station by using historical data of an energy management system (EMS) of the photovoltaic power station; secondly, establishing running state identifying models of the various photovoltaic generation units by using a support vector machine method and fitting a mapping relation between electric quantity loss information feature parameters and the running state; and finally, identifying the running states of the various photovoltaic generation units by using the running state identifying models so as to obtain a running state set of the whole photovoltaic power station. Workload on monitoring of the photovoltaic generation units can be reduced, operating personnel can find out faults of modules and systems in time, and an important scientific basis is provided for running and maintenance of the photovoltaic power station.

Description

technical field [0001] The invention relates to a method for accurately identifying the operating state of a photovoltaic power station, which belongs to the technical field of power generation. Background technique [0002] As an important part of renewable energy, photovoltaic power generation has developed rapidly in recent years, and grid-connected photovoltaic power plants are currently the main form of utilization of photovoltaic power generation. Generally, a photovoltaic power station is composed of several photovoltaic power generation units, and a photovoltaic power generation unit is composed of several photovoltaic modules connected in series and parallel. In the actual operation process, in addition to being affected by external environmental factors, the power generation efficiency of photovoltaic power plants is also closely related to the operating status of photovoltaic power generation units and inverters. Affected by factors such as inverter failure, powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00G06Q50/06
CPCG06Q50/06Y04S10/50
Inventor 王飞李康平米增强梅华威张雷梁玉杰白雪天李玉笑孙国腾
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)