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Power saving device for large power equipment

A technology of power saving device and power equipment, applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device for limiting overcurrent/overvoltage, etc. Affect the service life of equipment and other problems, to achieve the effect of reducing safety and stabilizing the voltage value

Inactive Publication Date: 2016-07-06
ZHEJIANG YONGYUAN XINNENG TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the frequency converter is also a large source of harmonic generation. When the frequency converter is used to transform large-scale power equipment, it will cause the equipment to generate different levels of harmonic voltage and harmonic current during operation, so that ordinary asynchronous motors Running under non-sinusoidal voltage and current will cause a significant temperature rise of the electrical equipment, causing severe local overheating of the electrical equipment, affecting the service life of the equipment, until the electrical equipment is damaged
The harmonics generated by the frequency converter in the process of transformation will cause the resonance of the power grid, which may amplify the harmonic current several times or even dozens of times, which will pose a major threat to the system, especially for capacitors and reactors connected in series. often burns it

Method used

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  • Power saving device for large power equipment
  • Power saving device for large power equipment
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Embodiment Construction

[0018] In order to understand the technical scheme of the present invention more intuitively and completely, the non-limiting feature descriptions are as follows in conjunction with the accompanying drawings of the present invention:

[0019] Such as Figure 1-Figure 3 As shown, a power-saving device for large-scale power equipment includes a chassis 1 and a power-saving device body 2 arranged in the chassis 1, and the power-saving device body 2 includes:

[0020] Integrated control unit 21, which adopts PID closed-loop control, collects various parameters generated in the operation of large-scale power equipment through its own sensors and compares them with the parameters required in production, and the results are fed back to the control system, and then output instructions to control the power The speed of the equipment is adjusted, and the control circuit outputs a suitable operation signal to the electrical equipment. The electrical equipment is always in a state of bala...

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Abstract

The invention discloses a power saving device for large power equipment. The power saving device comprises a machine case and a power saving device body, wherein the power saving device body is arranged in the machine case and comprises an integrated control unit, a bypass control unit, a harmonic compensation device, a reactive compensation device, a voltage stabilizing device, a surge control device and a bypass switching control key. According to the power saving device, electric equipment can always run in a supply-demand balance state through a PID control closed-loop link; the service lifetime of the electric equipment can also be prolonged under the condition of greatly reducing the energy consumption; and meanwhile, the bypass control unit of the device can effectively ensure that production of the electric equipment is not affected by an equipment failure.

Description

technical field [0001] The invention relates to a power saving device, in particular to a power saving device for large power equipment. Background technique [0002] At present, the known equipment for saving power for large-scale electrical equipment is a frequency converter device. The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the motor's working power supply. The inverter is mainly composed of rectification, filtering, inverter, braking unit, drive unit, detection unit and micro-processing unit. The inverter adjusts the voltage and frequency of the output power supply by switching off the internal IGBT, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation. However, the frequency converter is also a large source of harmonic generation. W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/01H02H9/02H02P27/04
CPCH02H9/02H02J3/01H02J3/18H02P27/04Y02E40/30Y02E40/40
Inventor 陈勇华
Owner ZHEJIANG YONGYUAN XINNENG TECH CO LTD
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