Direct-current spare power automatic switching device and judgment method

Abstract

The invention relates to the technical field of electrical automation, and concretely relates to a direct-current spare power automatic switching device and a judgment method. The device comprises a control electric cabinet used for controlling a circuit and an energy storage electric cabinet used for storing electric energy, a line switching module is arranged in the control electric cabinet, and the line switching module comprises a first-section bus circuit, a second-section bus circuit, a line switching circuit, a power storage group and a charging group. Lines of the charging group and the power storage group are switched through the line switching circuit, so that when the system needs three-charging two-power line switching, switching of the charging group and the power storage group is facilitated, the line switching speed is increased, operation and maintenance of the system are ensured, and the voltage and the current of each circuit are measured, and according to the measured voltage and current information, the circuit fault is judged, so the fault judgment difficulty is reduced, the circuit fault judgment speed of an operator is increased, and the operator can make quick judgment in an emergency.

Description

technical field [0001] The invention relates to the technical field of electrical automation, in particular to a DC standby automatic switching device and a judging method. Background technique [0002] As the safest power source, DC power supply is often used in substations, power plants, steel mills, petrochemicals, medicine, wind power, photovoltaics and other important occasions. Compared with small substations, large substations need to achieve "three charging and two power ", in order to ensure the normal power transformation of the substation. When performing three charging and two charging, maintenance personnel are required to operate judgment logic on site to switch the switch. In order to solve the current system operation and maintenance, maintenance personnel are required to be on duty to observe, and during the When switching between three charging and two batteries, the operator needs to have skilled skills, otherwise the normal operation of the system cannot ...

AI Technical Summary

Problems solved by technology

[0002] As the safest power source, DC power supply is often used in substations, power plants, steel mills, petrochemicals, medicine, wind power, photovoltaics and other important occasions. Compared with small substations, large substations need to achieve "three charging and two power ", in order to ensure the normal power transformation of the substation. When performing three charging and two charging, maintenance personnel are required to operate judgment logic on site to switch the switch. In order to solve the current system operation and maintenance, maintenance personnel are required to be on duty to observe, and during the When switching between three charging and two batteries, the operator needs to have skilled skills, otherwise the normal operation of the system cannot be guaranteed, and the operators who are skilled in operating the three charging and two batteries are too rare, and when switching circuits, the operation is complicated. It brings trouble to the operator to switch the circuit, and then prolongs the time for handling the accident, resulting in the inability to switch the line in time when there is an emergency line switch

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