Digital relay protection cabinet for monitoring load operation by adopting electric power sensor

Abstract

The invention discloses a digital relay protection cabinet for monitoring load operation by adopting an electric power sensor, wherein the digital relay protection cabinet (20) is made of an iron material, and is provided with an embedded reference power supply (13) for independently a reference power supply for monitoring and controlling, corresponding electrical components and power electronic assemblies are installed, and a power supply side common bus (14) is a micro-grid power supply system bus, and is connected with the Internet through an electric power Internet of Things communicationinterface (16). According to the invention, after power-on starting is carried out, a digital relay protection instruction is sent by a CPU (1) and an input / output assembly, full-digital processing isadopted, the input voltage amplitude is adjusted, the voltage amplitude requirement of a user load is automatically met, a super capacitor is real-timely switched in to avoid damage of surge currentto a storage battery when the load is started, the service life of the storage battery is prolonged, and safe and reliable power distribution and power supply of a micro-grid and starting of an electrical load are protected.

Description

Technical field [0001] The present invention relates to the field of "a digital relay protection cabinet using power sensors to monitor load operation", in particular to the use of sensors to monitor load operation in microgrid energy storage operation, which is beneficial to prolong the service life of the storage battery of the microgrid and the performance of the microgrid Safe power supply. Background technique [0002] At present, the well-known microgrid energy storage mostly uses air circuit breakers and charge controllers to charge the batteries. The disadvantage is that in the microgrid power supply system, when multiple sets of batteries are operated in series or parallel, there is a lack of equalization of the voltage of each set of batteries. Technical means, and more importantly, the inrush current that damages the battery when the load starts, will directly affect the service life of the battery and the power quality of the microgrid. Summary of the invention [000...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the known micro-grid energy storage uses air circuit breakers and charging controllers to charge the batteries. The disadvantage is that in the micro-grid power supply system, when multiple sets of batteries are connected in series or in parallel, there is a lack of voltage balance for each set of batteries. Technical means, more importantly, there is a surge current that damages the battery when the load starts, which will directly affect the service life of the battery and the power quality of the microgrid power supply

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