Large-scale impact power generation device group frequency conversion starting device

Abstract

The invention discloses a large-scale impact power generation group frequency conversion starting device, and belongs to the field of mechanical equipment. An impact power generation device is also called a short circuit power generation device which is used for providing heavy short circuit current for a high-voltage switch and a transformer to perform type tests. Soft starting of a high-voltage asynchronous motor is a difficult point in the project. Formerly, a loop of a motor rotor is connected in series with multiple paths of resistors, and each path of resistor is connected gradually in a shorting way in the starting process so that soft starting is realized. The scheme is high in device investment, low in operation efficiency, large in operation maintenance amount and not high in control accuracy, and cannot provide 60Hz operation working state. In order to solve defects in the prior art, the invention provides the large-scale impact power generation device group frequency conversion starting device. An H-bridge scheme of series connected power units is adopted. Components of the device comprise a switch cabinet, a transformer cabinet, a power cabinet and a control cabinet. Problems in the prior art that the conventional scheme is high in device investment, low in operation efficiency, large in operation maintenance amount and not high in control accuracy, and cannot provide 60Hz operation working state are solved.

Description

technical field [0001] The invention belongs to the field of mechanical equipment, and in particular relates to a variable frequency starting device for a large impact generating set. Background technique [0002] The impact generator, also known as the short-circuit generator, is a device that provides a large short-circuit current for the type test of high-voltage switches and transformers; its operation is driven by a 10 kV high-voltage asynchronous motor to the rated speed, and then the short-circuit test is performed using the rotational energy; and The soft start of the high-voltage asynchronous motor is a difficult point of the project. In the past operating conditions, the rotor circuit of the motor is connected in series with multiple resistors, and each resistor is gradually shorted during the start-up process to achieve soft start. The efficiency is low, the amount of operation and maintenance is large, the control accuracy is not high, and the operating condition...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies of the prior art, the present invention provides a variable frequency starting device for a large-scale impact generating set, which solves the problem that the prior art requires a lot of investment in equipment, low operating efficiency, large amount of operation and maintenance, low control accuracy, and cannot provide 60 Hz Problems with operating conditions

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