Comprehensive generating efficiency detection method suitable for photovoltaic power station

A photovoltaic power station, power generation efficiency technology, applied in photovoltaic power generation, photovoltaic system monitoring, photovoltaic modules, etc., can solve problems such as low reliability and large errors

Active Publication Date: 2014-10-29
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a comprehensive detection method of power generation efficiency suitable for photov

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  • Comprehensive generating efficiency detection method suitable for photovoltaic power station
  • Comprehensive generating efficiency detection method suitable for photovoltaic power station
  • Comprehensive generating efficiency detection method suitable for photovoltaic power station

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[0048] The present invention will be further introduced below in conjunction with the drawings and specific embodiments.

[0049] Such as figure 1 with figure 2 As shown, the present invention provides a comprehensive detection method of power generation efficiency suitable for photovoltaic power plants, including the following steps:

[0050] (1) Calculate the efficiency values ​​of the following components: photovoltaic array efficiency η 1 、Combiner box efficiency η 2 , DC link efficiency η 3 , AC line efficiency η 4 、Inverter efficiency η 5 And transformer efficiency η 6 , The calculation process of the efficiency of the above components is as follows:

[0051] Photovoltaic array efficiency η 1 The calculation process is as follows: the volt-ampere characteristics of photovoltaic modules have strong real-time performance, and photovoltaic characteristics will change unpredictably. Only under the optimal working voltage of photovoltaic modules can the modules obtain the maximum p...

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Abstract

The invention discloses a comprehensive generating efficiency detection method suitable for a photovoltaic power station. Comprehensive detection is performed on key equipment of the photovoltaic power station such as a photovoltaic array, a combiner box, an inverter and a transformer as well as direct-current line loss and alternating-current line loss, the electric quantity loss and power loss values of each link are acquired, and comprehensive detection of the generating efficiency of the entire station is realized in combination with system efficiency. Moreover, the bottleneck of the generating efficiency of the entire station can be evaluated by comparing and analyzing the generating efficiency of the key equipment in each photovoltaic power generation link in the same time period, causes are analyzed, and the bottleneck problem is solved, thereby increasing the generating efficiency and generating benefit of the entire station.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and in particular relates to a method for comprehensive detection of power generation efficiency suitable for photovoltaic power plants. Background technique [0002] As a clean new energy source, solar energy has the characteristics of abundant resources and limited regional scope. With the rapid development of the photovoltaic industry, the subsidy mode of distributed photovoltaic power stations has transitioned from power station construction subsidies to power generation subsidies. August 30, 2013 The National Development and Reform Commission issued the "Notice on Using Price Leverage to Promote the Healthy Development of the Photovoltaic Industry", and the subsidy for distributed photovoltaic power generation projects is 0.42 yuan per degree. According to the electricity subsidy policy, the increase in distributed photovoltaic power generation directly increases the in...

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Application Information

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IPC IPC(8): H02S50/00
CPCY02E10/50
Inventor 王景丹龚晓伟董永超孔波唐云龙路进升贺衬心王留送焦东东张燕
Owner STATE GRID CORP OF CHINA
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