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Maximum power measurement device, method and power generation measurement method of photovoltaic module

A photovoltaic module and maximum power technology, applied in photovoltaic power generation, photovoltaic system monitoring, photovoltaic modules, etc., can solve the problems of low accuracy of maximum output power, poor adaptability, heavy workload, etc., and achieve small error, The effect of strong engineering practicability and high accuracy

Active Publication Date: 2017-05-10
BEIJING ETECHWIN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that when establishing the relationship table between the maximum output power of the photovoltaic cell and the temperature and light intensity, it is necessary to collect the output power in various environments, and the workload is relatively large. In addition, the establishment of the relationship table is carried out at the location of the photovoltaic cell. collection and experiment, and when the location of the photovoltaic cell changes, the established relationship table is no longer applicable to the current location, so this method is not adaptable. If the maximum output power is still obtained based on the established relationship table, the It will lead to the accuracy of the maximum output power obtained is not high

Method used

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  • Maximum power measurement device, method and power generation measurement method of photovoltaic module
  • Maximum power measurement device, method and power generation measurement method of photovoltaic module

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Embodiment 1

[0033] figure 2 It is a schematic structural diagram of a maximum power measuring device for photovoltaic modules according to Embodiment 1 of the present invention, such as figure 2 As shown, the maximum power measurement device for photovoltaic modules in the embodiment of the present invention includes: a voltage measurement circuit 11, one end of the voltage measurement circuit is connected to the positive pole of the photovoltaic module, and the other end is connected to the negative pole of the photovoltaic module for measuring the current The open-circuit voltage and discharge voltage of the photovoltaic module in the environment; the controller 12 is connected with the voltage measurement circuit 11, and is used for operating voltage, operating current, and open-circuit voltage corresponding to the first maximum power and the first maximum power point in the standard environment and the discharge voltage to obtain the second maximum power of the photovoltaic module u...

Embodiment 2

[0040] image 3 It is a schematic structural diagram of a maximum power measuring device for photovoltaic modules according to Embodiment 2 of the present invention, such as image 3 As shown, the maximum power measurement device for photovoltaic modules in the embodiment of the present invention includes: a voltage measurement circuit 21, one end of the voltage measurement circuit is connected to the positive pole of the photovoltaic module, and the other end is connected to the negative pole of the photovoltaic module for measuring the current The open-circuit voltage and discharge voltage of the photovoltaic module in the environment; the controller 22 is connected with the voltage measurement circuit 21, and is used for operating voltage, operating current, and open-circuit voltage corresponding to the first maximum power and the first maximum power point in the standard environment and the discharge voltage to obtain the second maximum power of the photovoltaic module und...

Embodiment 3

[0063] Figure 4 It is a schematic flow chart of the method for measuring the maximum power of a photovoltaic module according to Embodiment 3 of the present invention, such as Figure 4 As shown, the maximum power measurement methods for photovoltaic modules include:

[0064] Step 301: Measure the open circuit voltage and discharge voltage of the photovoltaic module in the current environment.

[0065] Step 302: Obtain the second maximum power of the photovoltaic module in the current environment according to the first maximum power in the standard environment, the operating voltage and operating current corresponding to the first maximum power point, and the open circuit voltage and discharge voltage in the current environment. Specifically, according to the first maximum power in the standard environment, the operating voltage and operating current corresponding to the first maximum power point, and the open circuit voltage and discharge voltage in the current environment,...

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Abstract

The embodiment of the invention provides a maximum power measuring device and method of a photovoltaic module and a generating capacity measuring method. The maximum power measuring device for the photovoltaic module comprises a voltage measuring circuit and a controller. One end of the voltage measuring circuit is connected with a positive electrode of the photovoltaic module. The other end of the voltage measuring circuit is connected with a negative electrode of the photovoltaic module. The voltage measuring circuit is used for measuring the open-circuit voltage and the discharging voltage of the photovoltaic module of a current environment. The controller is connected with the voltage measuring circuit and is used for obtaining the second maximum power of the photovoltaic module of the current environment according to the first maximum power under a standard environment, working voltage and working current corresponding to a first maximum power point, the open-circuit voltage and the discharging voltage. According to the maximum power measuring device and method of the photovoltaic module and the generating capacity measuring method, the maximum power and the generating capacity of the photovoltaic module can be measured, measuring accuracy is improved, the structure is simple, reliability is high, and cost is low.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a maximum power measurement device and method of a photovoltaic module and a method for measuring power generation. Background technique [0002] As a clean and environmentally friendly new energy source, solar energy has attracted more and more attention. In the operation of photovoltaic power plants, power generation is a key indicator for evaluating its performance. In the prior art, there are mainly two methods: [0003] One is the mathematical model method: use temperature sensors and light intensity sensors to collect environmental parameters, and then combine the mathematical model of photovoltaic panels to calculate the output power value of photovoltaic cells under the environmental parameters. The disadvantage of this method is that the mathematical model is relatively complex, and a large number of field environment and electrical parameters are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02S50/10
CPCH02S50/00Y02E10/50
Inventor 张国驹赵帅央刘炳张黎杰
Owner BEIJING ETECHWIN ELECTRIC