Grid-connected solar photovoltaic power station monitoring system

Abstract

The invention provides a grid-connected solar photovoltaic power station monitoring system which can monitor the temperature of a photovoltaic array group string, an output current voltage and direct current (DC) combiner box, a DC combiner box, a DC power distribution cabinet, an inverter, an alternating current (AC) power distribution cabinet, in-out current voltages of a boosting transformer, input current voltages of a grid-connected point, and the environment temperature, the light irradiance and the wind speed and direction of the solar photovoltaic array group string. Measured data of all the components are gathered comprehensively, essential information of a power station, test data of monitored components and environment meteorological data are displayed and stored in real time, information such as the running conditions of the monitored components and the performance ratio of the power station is calculated out, and an actual measurement operational data base of the power station is established. The components of the photovoltaic power station and the performance and the reliability of the system are estimated comprehensively, the optimization design of photovoltaic components and the system is promoted, and real and reliable data support is provided for the research and development and the improvement of photovoltaic power generating technology.

Description

technical field [0001] The invention relates to the field of solar photovoltaic power generation, in particular to a grid-connected solar photovoltaic power generation monitoring system. Background technique [0002] In recent years, the photovoltaic industry has developed rapidly, and photovoltaic power generation projects have been recognized by the society and strongly supported by the state because of their clean energy, environmental friendliness, and renewable advantages. While the large-scale construction of photovoltaic power plants has exposed a serious problem, that is, the development of the detection platform for photovoltaic power generation systems is relatively backward, and it is urgent to establish a complete detection system for photovoltaic power generation systems. [0003] Such as figure 1 As shown, the grid-connected photovoltaic power station is composed of photovoltaic array strings, combiner boxes, DC power distribution cabinets, inverters, AC power...

AI Technical Summary

Problems solved by technology

[0004] Especially in China, there is little experience in photovoltaic power generation construction and power station design. Most of the monitoring equipment of photovoltaic power stations only starts to record and analyze various data from the DC input of the inverter. The test of the data of the DC power distribution cabinet cannot realize the comprehensive inspection of the entire power station, and cannot evaluate the power generation efficiency, equipment failure rate, operation reliability and maintenance cost of each component, component and system within the operating life cycle of the power station after completion

Another problem is that the current detection equipment of the power station is provided by the inverter itself or installed in the combiner box itself, and can only be tested for this power station.

There is no mobile monitoring device suitable for various power stations

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