Speed regulation method of energy recovery system of speed regulation type double four-quadrant frequency converter

A four-quadrant frequency converter and energy recovery technology, which is applied in the direction of non-variable pumps, machines/engines, steam engine devices, etc., can solve the problems of energy recovery efficiency and variable speed adjustment, so as to reduce energy consumption, improve efficiency, The effect of improving reliability

Active Publication Date: 2021-04-30
XIAN SHAANGU POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a speed regulation method for the energy recovery system of a speed-adjustabl

Method used

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  • Speed regulation method of energy recovery system of speed regulation type double four-quadrant frequency converter
  • Speed regulation method of energy recovery system of speed regulation type double four-quadrant frequency converter
  • Speed regulation method of energy recovery system of speed regulation type double four-quadrant frequency converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment provides an energy recovery system for a speed-regulating double four-quadrant inverter, such as image 3 As shown, including the first SHRT1 and the second SHRT2;

[0070] The first SHRT1 includes the first sintering blower 101, the first motor 102, the first transmission clutch 103 and the first steam turbine 104 which are connected coaxially in sequence, and also includes the first sintering blower 101, the first motor 102, the first transmission clutch 103 A first unit DCS controller 105 electrically connected to the first steam turbine 104;

[0071] The second SHRT2 includes the second sintering fan 201, the second motor 202, the second transmission clutch 203 and the second steam turbine 204 which are connected coaxially in sequence, and also includes the second sintering fan 201, the second motor 202, the second transmission clutch 203 A second unit DCS controller 205 electrically connected to the second steam turbine 204;

[0072] The first mot...

Embodiment 2

[0077] This embodiment provides a speed regulation method for an energy recovery system of a speed-adjustable double four-quadrant inverter. The speed regulation method uses the energy recovery system for a speed-adjustable double four-quadrant inverter in Embodiment 1. Specifically, the method includes the following steps:

[0078] Step 1, speed reduction control:

[0079] Step 30201, the DCS controller 105 of the first unit and the DCS controller 205 of the second unit give the PLC controller 7 of the frequency converter the target speed to be adjusted, and the PLC controller 7 of the frequency converter calculates the corresponding frequency according to the target speed;

[0080] Step 30202, send an instruction through the inverter PLC controller 7, and simultaneously reduce the speed of the first motor 102 and the second motor 202 through the regulation of the first four-quadrant inverter 3 and the second four-quadrant inverter 4;

[0081] Step 30203, during the decelera...

Embodiment 3

[0099] This embodiment provides a control method for an energy recovery system of a speed-regulating double four-quadrant inverter, which uses the energy recovery system of a speed-adjusting double four-quadrant inverter in Embodiment 1. Specifically, the method includes the following steps:

[0100] Step 1, start up to power frequency rated speed control:

[0101] Step 101, when starting, the DCS controller 105 of the first unit and the DCS controller 205 of the second unit issue a start command to the PLC controller 7 of the inverter, controlled by the PLC controller 7 of the inverter, and pass through the DCS controller 205 of the second unit For regulation and control, first close the damper of the second sintering fan 201 to an opening of 5% to 10%, and then start the first sintering fan 101;

[0102] Step 102, according to the speed-up rate set by the inverter PLC controller 7, the first motor 102 is raised to a power frequency of 50 Hz through the regulation of the fir...

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Abstract

The invention discloses a speed regulation method of an energy recovery system of a speed regulation type double four-quadrant frequency converter. In the speed reduction process, in a first SHRT, a first clutch is always in an engaged state, and a first motor drags a first sintering fan and a first turbine to synchronously reduce the speed; meanwhile, a first four-quadrant frequency converter can generate a braking torque, and the braking torque is reversely sent to a power grid through the first four-quadrant frequency converter; and in the speed increasing process, in the first SHRT, the first clutch is disengaged, and the first motor independently drags the first sintering fan to increase the target rotating speed. According to the speed regulation method, a variable-speed regulation steam-electricity double-drive mode is adopted, the purpose of recovering waste heat energy is achieved, meanwhile, the efficiency of the fan is improved through a speed regulation operation mode, and the energy consumption of the fan is reduced. The power generation function is achieved, and power is supplied to the power grid when the recovered energy is larger than the power consumption of the fan.

Description

technical field [0001] The invention belongs to the field of energy recovery, relates to sintering waste heat recovery, in particular to a speed regulation method for an energy recovery system of a speed-regulating double four-quadrant frequency converter. Background technique [0002] In recent years, with the country's vigorous development of infrastructure construction, the iron and steel metallurgy industry has also developed rapidly. The metallurgical industry is a high-energy-consuming industry, and the pollution to the environment is relatively serious. During the production process of metallurgy, a large amount of waste heat will be generated, and the recovery and utilization of waste heat will play a decisive role in production energy efficiency, product cost, energy saving and emission reduction; Introduced, it puts forward higher requirements for high efficiency and energy saving of equipment. [0003] At present, in the sintering process of the domestic iron an...

Claims

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Application Information

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IPC IPC(8): F04D25/04F04D25/08F04D27/00F01D15/08F01D15/10F01K13/00F01K27/00H02J3/38
CPCF04D25/045F04D25/08F01D15/08F01K27/00F01D15/10F01K13/00F04D27/004H02J3/38
Inventor 张俊龙周根标李付俊孙鸿声柳黎光李震贾江平刘拥军强科严伟博张智军黄科周宁王晖
Owner XIAN SHAANGU POWER
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