High-power motor operating mechanism control device and method

Abstract

The invention provides a high-power motor operating mechanism control device and method, and relates to the technical field of electrical automation control. The control device comprises a rectification unit, a voltage stabilizing capacitor, a buck-boost converter, an energy storage device, a signal acquisition unit, a signal processing unit, an inverter, a main controller, a current conditioningcircuit, a position signal conditioning circuit, a capacitor voltage detection unit, an upper computer, a PWM isolation driving unit and a low-voltage DC power supply. The upper computer issues different control instructions to the main controller when a circuit breaker breaks short-circuit current, rated current and no-load working conditions; the main controller sends an instruction to the buck-boost converter and the inverter, the buck-boost converter provides different voltage values for the energy storage device, and a motor operating mechanism moves according to a preset ideal travel speed curve of a moving contact. According to the control device and the control method, the rigid collision between the moving contact and a static contact is effectively reduced, and the reliability ofthe motor operating mechanism of a high-voltage circuit breaker is improved.

Description

Technical field [0001] The invention relates to the technical field of electrical automation control, and in particular to a control device and method for a high-power motor operating mechanism. Background technique [0002] With the in-depth development of smart grid technology in China, the power system has put forward higher requirements for the reliability of high-voltage electrical equipment and the level of intelligent operation. As an important switch device in the power system, the high-voltage circuit breaker is responsible for the dual tasks of protecting and controlling the circuit. Its performance is one of the important factors that determine whether the power system can operate safely. The traditional operating mechanism has defects such as high complexity, poor controllability of moving contacts, susceptible parts to impact, and limited state detection range. It is difficult to achieve efficient and reliable opening or closing of the circuit breaker. The high-prec...

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Problems solved by technology

The traditional operating mechanism has defects such as high complexity, poor controllability of moving contacts, vulnerable components, and limited state detection range. It is difficult to achieve efficient and reliable opening or closing of circuit breakers. For circuit breakers The high-precision position control of the center-moving arc contact cannot be realized. Under different working conditions such as breaking short-circuit current, rated current, and no-load operation, the opening or closing movement can only be performed with a single speed movement characteristic. control

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