Error correction method for dynamic MPPT (maximum power point tracking) efficiency test on photovoltaic inverter

A photovoltaic inverter and efficiency testing technology, applied in the field of electric power, can solve the problem of inaccurate dynamic MPPT efficiency testing of photovoltaic inverters, etc., and achieve the effect of solving the deviation of the output I-V curve and accurate testing

Inactive Publication Date: 2015-09-30
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

[0010] The present invention proposes an error correction method for dynamic MPPT efficiency testing of photovol

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  • Error correction method for dynamic MPPT (maximum power point tracking) efficiency test on photovoltaic inverter
  • Error correction method for dynamic MPPT (maximum power point tracking) efficiency test on photovoltaic inverter
  • Error correction method for dynamic MPPT (maximum power point tracking) efficiency test on photovoltaic inverter

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Embodiment Construction

[0043] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0044] Such as figure 1 Shown, a kind of error correction method of dynamic MPPT efficiency test of photovoltaic inverter, described method comprises:

[0045] (1) According to the measured photovoltaic inverter capacity and matching component type, select the P-V curve model output by the photovoltaic simulation simulator under the STC condition; select the P-V output by the photovoltaic simulation simulator under the STC condition in the described step (1) The curve model is shown in the following formula:

[0046] I P V = I S C - I 0 ( e U P ...

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Abstract

The invention provides an error correction method for a MPPT (maximum power point tracking) efficiency test on a photovoltaic inverter. The method comprises steps as follows: selecting a P-V curve model output by a photovoltaic simulator under an STC condition according to the capacity of the to-be-tested photovoltaic inverter and the type of a matched assembly; on the basis of the P-V curve model, acquiring an I-V curve output by a photovoltaic array simulator during change of irradiance according to the relation among open-circuit voltage UOC;STC, short-circuit current ISC;STC and irradiance G; acquiring an I-V curve output by the photovoltaic array simulator according to the requirement of the EN50530 standard for dynamic MPPT test irradiance; constructing a dynamic MPPT efficiency test platform for the photovoltaic inverter, acquiring test data of the I-V curve output by the photovoltaic array simulator, and uploading the data to an upper computer; correcting errors by the upper computer. Thus, the fine and accurate test on the dynamic MPPT efficiency of the photovoltaic inverter is realized.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an error correction method for dynamic MPPT efficiency testing of photovoltaic inverters. Background technique [0002] In recent years, new energy represented by wind energy and solar energy has developed rapidly around the world. By the end of 2011, the cumulative installed capacity of solar power generation in the world reached 67.4 million kilowatts. Among them, the growth rate of photovoltaic module output is astonishing. In 2010, the shipment of solar cell modules reached 20GW, and in 2011, the shipment of photovoltaic modules reached 27.7GW. It is estimated that by 2020, the annual output of photovoltaic modules will reach 40GW. In this case, the power generation efficiency of the photovoltaic system is also receiving extensive attention. An important factor affecting the power generation efficiency of a photovoltaic system is the maximum power point tracking acc...

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Application Information

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IPC IPC(8): H02S50/10
CPCH02S50/00Y02E10/50
Inventor 黄晶生曹磊董玮李红涛董颖华郑飞
Owner CHINA ELECTRIC POWER RES INST
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