Power generation amount calculation method of photovoltaic power generating system based on full-time-period simulated integration

Abstract

The invention discloses a power generation amount calculation method of a photovoltaic power generating system based on full-time-period simulated integration. A full-time-period environment parameter simulating method is presented through summarizing engineering practice. Simulated calculation is performed on data in each time period. Approximately, a thought that parameter data is unchanged in the time period is utilized for obtaining a full-time-period environment temperature parameter T. According to a local month astronomical radiation amount and a month sunshine duration, full-time-period sunshine strength of a location where a photovoltaic power station is arranged can be approximately simulated. Finally an instant output power of the photovoltaic power station is obtained according to a photovoltaic battery parameter. Then output values of all time points are summarized through integration. The power generation amount calculation method is advantageous in that a full-time-period temperature T and the sunshine strength S are obtained through the full-time-period simulating method; furthermore the photovoltaic power station output at each time point is calculated; an output curve of all time periods in a whole year is obtained; and then the output values of all time points is summarized through integration, thereby obtaining the total power generation amount.

Description

technical field [0001] The invention relates to a method for calculating the power generation of a photovoltaic power generation system, in particular to a method for calculating the power generation of a photovoltaic power generation system based on full-time analog integration, and belongs to the field of calculation methods for the power generation of a photovoltaic power generation system. Background technique [0002] In recent years, photovoltaic power generation has received more and more attention, and a large number of photovoltaic power plants have been built in areas rich in light resources. In the feasibility study stage of photovoltaic power plant design, power plant designers generally calculate the power generation based on the local average annual radiation. For the estimation of the power generation of photovoltaic power generation system, domestic and foreign scholars have proposed many algorithms. The most common method is to simulate and calculate the ou...

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Problems solved by technology

The most common method is to simulate and calculate the output power of the photovoltaic power generation system by establishing a solar radiation model and a photovoltaic power generation system model, and then obtain the power generation. However, this method does not consider the influence of temperature on the output of photovoltaic cells; some foreign scholars based on BP neural network and gray theory have established a prediction and evaluation model for the power generation of photovoltaic power generation systems, but this type of model has high requirements for the law of power generation and lacks the effectiveness of engineering practice; Hourly, daily, and monthly measurement data are used to analyze and calculate the theoretical power generation of photovoltaics to analyze the impact of different environments and equipment states on photovoltaic output. However, this method has little reference significance for estimating the power generation of the actual photovoltaic power plant project to be built.

[0003] In the feasibility study stage of photovoltaic power station construction, the estimation method of the power generation of the existing power station is not accurate. In areas lacking environmental parameters and light intensity parameters, the calculation of power generation based on astronomical radiation alone lacks theoretical support and the accuracy cannot be guaranteed.

The influence of the local ambient temperature on the output of photovoltaic cells is not considered, and the simple conversion of local radiation into electricity without considering the working mechanism of photovoltaic cells lacks theoretical support

Especially in places where environmental parameters cannot be obtained, this method cannot reflect the timeliness of photovoltaic power generation system output

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