Demonstration-based photovoltaic power station testing diagnosis and forecasting database establishment method

Abstract

The invention discloses a demonstration-based photovoltaic power station testing diagnosis and forecasting database establishment method. In the method, deep mining and probability reliability assessment are performed on the statistical data of different components and balancing parts in a demonstration system based on long-term running performance testing data by using a reliability analysis principle to form reliability and economy-coordinated comprehensive evaluation mechanism and establish a photovoltaic power station field fault diagnosis and maintenance forecasting database. The method has the advantage of comprehensively evaluating the reliability, running performance and cost of photovoltaic components, the parts and the system.

Description

technical field [0001] The patent of the present invention relates to a method for establishing a field test, diagnosis and prediction database for photovoltaic power plants through empirical demonstration in the field of advanced energy technology. Background technique [0002] Facing the explosive growth of my country's photovoltaic industry, it is necessary to establish a complete photovoltaic system testing system to adapt to it, but domestic empirical testing technology is still blank. Due to the laboratory standard test environment (STC, that is, the solar irradiance is 1000W / m 2 , the battery temperature is 25°C, and the air quality is 1.5), the data cannot faithfully reflect the performance indicators in the actual environment. According to the data obtained from laboratory tests, it cannot meet the real needs of users for system reliability and operating costs. Little experience in photovoltaic power generation construction and power station design, reliable measur...

AI Technical Summary

Problems solved by technology

This patent invented a photovoltaic grid-connected inverter with photovoltaic array IV test function. The main test method is: at the input port of the photovoltaic array and the filter capacitor C 1 The current sensor CT used to measure the input current of the photovoltaic array is set between 1 , set up for measuring the filter capacitor C 1 DC bus voltage sensor VT for terminal voltage 1 , set the DC circuit breaker K at the output port of the photovoltaic array 1 , the total output current of the photovoltaic array passes through the DC circuit breaker K 1 Input photovoltaic grid-connected inverter, DC bus voltage sensor VT 1 and current sensor CT 1 , to collect VT 1 and C 1 data, it is possible to figure 2 The test of the IV characteristics of the photovoltaic array of the system shown, but the invention patent has a single function, the test accuracy is limited, and the accuracy of the data cannot be guaranteed. It is necessary to conduct research on outdoor empirical technologies, and to make statistics on the data collected through long-term empirical demonstrations. Analysis, establishment of corresponding database, data processing, evaluation and analysis for the database

Images