Dual-power rapid switching control device and method

Abstract

The invention relates to a dual-power rapid switching control device and a method. The dual-power rapid switching control device is composed of a controller which is used for controlling a bus coupler to be connected with a first bus and a second bus and is connected with a controllable brake resistor component for attenuating residual voltage of a non-voltage bus rapidly, wherein the controllable brake resistor component comprises a first bus rapid switch, a second bus rapid switch and a resistor, one end of the first bus rapid switch is connected with the first bus, and the other end thereof is connected with the resistor, and a control end thereof is connected with the controller; and one end of the second bus rapid switch is connected with the second bus, and the other end is connected with the resistor, and a control end thereof is connected with the controller. When master switch can not be realized, the invention uses the controllable brake resistor component to adjust the residual voltage attenuation characteristic of the bus on line to shorten the attenuation time of the bus residual voltage so as to realize the mode of double rapidness and improve the switching speed of the dual-power power supply system.

Description

technical field [0001] The invention relates to a power switching device and method, in particular to a dual power fast switching control device and method. Background technique [0002] Continuous and reliable power supply is the basic condition for the safe operation of electrical equipment. Therefore, occasions that require high power supply reliability are generally equipped with two power supplies, and the successful and fast switching between the two power supplies is the key to continuous and uninterrupted power supply. Due to external or internal reasons such as lightning strikes, short circuits, low-frequency oscillations, and load circuit failures, large and medium-sized industrial enterprises such as petrochemical, metallurgical, and power plants often experience abnormal power outages, large voltage fluctuations, or short-term power outages (commonly known as "shock power") , Due to the particularity of the technological process of metallurgical and petrochemical...

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Problems solved by technology

However, due to the complexity of the system, the success rate of the main switching has a certain randomness. When the main switching cannot be realized, the protection switch of the motor will trip because the protection time of the motor exceeds 500 milliseconds. If it enters the standby switching mode, the mechanical load driven by the motor Just can only restart after power outage, can cause catastrophic loss to production, therefore, prior art standby switching is a kind of " lossy " switching

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