Intelligent circuit breaker and protection method for solar battery module string

Abstract

An intelligent circuit breaker for solar battery module strings, the circuit breaker intelligent controller (11), the voltage measurement and conditioning (5), the current measurement and conditioning (6) are respectively connected to the circuit breaker intelligent controller (11), The manual release (3) and the manual close (4) are respectively connected to the circuit breaker actuator (2); the circuit breaker actuator (2) is connected to the main contact (1), and the circuit breaker state auxiliary contact ( 9) Connect with the circuit breaker intelligent controller (11). The invention is to measure the voltage and current signals of the solar battery module strings to perform fault judgment and open-close control, to realize fault protection such as short-circuit of the solar battery module strings, to realize the telemetry function of the solar battery module string electric signals, and to consider installation manual control requirements, and to enhance The safety of solar power generation.

Description

technical field [0001] The invention relates to solar photovoltaic power generation technology and low-voltage electrical appliance technology, in particular to an intelligent circuit breaker and protection method for solar battery module strings, which can be widely applied to various power generation systems using solar module. Background technique [0002] Under the urgent situation of global warming, the deterioration of the ecological environment and the shortage of conventional energy resources, the renewable energy power generation technology constructed with various solar modules as generators has been rapidly developed and applied. However, in the solar power plants that are put into operation, there are often electrical faults in the string DC system of solar modules and the resulting fires. The original solar module protection equipment and anti-reverse have defects and deficiencies. One of the reasons is that the string circuit cannot be cut off due to faults suc...

AI Technical Summary

Problems solved by technology

However, in the solar power plants put into operation, there are often electrical faults in the solar module series DC system and the resulting fires

There are defects and deficiencies in the original solar module protection equipment and anti-reverse, one of the reasons is that it is impossible to determine the faults such as short circuit and electric arc to cut off the string circuit, causing damage to cables, equipment or components, reducing the utilization rate of solar energy resources, and generating Serious economic losses have affected the promotion and application of solar power generation

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