矿用高频隔离型变频调速无速度传感器矢量控制

刘文壮; 刘建功; 王毅颖; 伯磊; 郝育红

doi:10.13272/j.issn.1671-251x.2022050020

矿用高频隔离型变频调速无速度传感器矢量控制

doi: 10.13272/j.issn.1671-251x.2022050020

刘文壮^{1, 2,},
刘建功^{1, 2},
王毅颖^{1, 2, ,},
伯磊³,
郝育红⁴

1.
河北工程大学机械与装备工程学院, 河北邯郸　056038
2.
河北省煤炭生态保护开采产业技术研究院, 河北邯郸　056038
3.
中国矿业大学(北京) 机电与信息工程学院, 北京　100083
4.
冀中能源峰峰集团有限公司, 河北邯郸　056107

基金项目: 河北省自然科学基金资助项目（E2020402064）；河北省创新能力提升计划项目（215676140H）；邯郸市科学技术研究与发展计划项目（21422093229，20312904002）。

详细信息

作者简介:
刘文壮（1998-），男，山东菏泽人，硕士研究生，研究方向为电力电子与电力传动，E-mail：445515747@qq.com

通讯作者:
王毅颖（1985—），男，河北保定人，讲师，博士，硕士研究生导师，研究方向为电力电子变压器，E-mail：yatesyy@163.com

中图分类号: TD614.5
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出版历程
- 收稿日期: 2022-05-08
- 修回日期: 2022-07-12
- 网络出版日期: 2022-06-07

High-frequency isolated variable frequency speed regulation sensorless vector control in mine

LIU Wenzhuang^{1, 2
,},
LIU Jiangong^{1, 2},
WANG Yiying^{1, 2
, ,},
BO Lei³,
HAO Yuhong⁴

1.
School of Mechanical and Equipment Engineering, Hebei University of Engineering , Handan 056038, China
2.
Hebei Coal Ecological Protection Mining Industry Technology Research Institute, Handan 056038, China
3.
School of Mechanical Electronic and Information Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
4.
Jizhong Energy Fengfeng Group Co., Ltd., Handan 056107, China

摘要

摘要: 在煤矿中、高压及有限场合，变频器采用工频变压器接入电网且被控电动机大多采用开环控制，存在工作空间狭小、结构复杂和电动机控制鲁棒性差等问题。针对上述问题，提出了一种基于高频隔离型变频调速拓扑结构的无速度传感器矢量控制策略。对矿用高频隔离型变频调速主电路拓扑及功率传输进行了分析：通过不可控整流环节将输入的三相工频交流电源整流为直流电源，将脉动直流电源进行平滑滤波处理，得到稳定的直流电源，经高频隔离DC−DC级进行变压，然后经三相逆变级将直流电源逆变为电压和频率均可调的交流电源。为减少IGBT开关损耗、节约整体成本并减少其整体结构复杂性，三相整流级采用二极管不控整流策略；高频隔离DC−DC级采用等脉宽调制策略(EPWM)；三相逆变级采用无速度传感器矢量控制策略，在该控制策略中采用模型自适应系统（MRAS）进行异步电动机速度估测。采用0.75 kW的三相异步电动机作为被测电动机，对矿用高频隔离型变频调速无速度传感器矢量控制策略进行实验验证，结果表明：① 高频隔离DC−DC级两侧直流母线电压波动小于10 V且高频方波电压相等，原边单相逆变方波和高频变压器耦合方波电压波形平滑，整体稳态性能好。② 三相逆变级电压、电流波形正弦度良好，波形对称且光滑度较好，三相逆变级稳定性能好，满足电动机运行要求。③ 随时间增加，励磁电流变化较稳定，转矩电流在启动时响应迅速，且启动阶段转矩电流较大，能产生较大的转矩。④ 电动机速度稳定阶段速度波动小，加、减速阶段波形趋于一次函数，电动机能够平稳启停。电动机在刚启动时最大转矩可达到稳定转矩的5倍以上，能够较快启动进行工作。
- 高频隔离型变频器 /
- 变频调速 /
- 无速度传感器矢量控制 /
- 模型自适应 /
- 异步电动机 /
- 逆变级 /
- 高频隔离DC−DC级 /
- 整流级
Abstract: In the coal mine's medium and high voltage and limited occasions, the frequency converter is connected to the power grid by power frequency transformer. Most of the controlled motors are controlled by open-loop control, which has the problems of narrow working space, complex structure and poor robustness of motor control. In order to solve the above problems, a speed sensorless vector control strategy based on high frequency isolated variable frequency speed regulation topology is proposed. This paper analyzes the topology and power transmission of the main circuit of high-frequency isolated variable frequency speed regulation in mine. The input three-phase power frequency AC power supply is rectified into DC power supply through an uncontrollable rectification link. The pulsating DC power supply is smoothed and filtered to obtain a stable DC power supply. The DC power supply is transformed through high-frequency isolation (DC-DClevel). Then, through the three-phase inverter stage, the DC power supply is converted into AC power supply with adjustable voltage and frequency. In order to reduce IGBT switching loss, save the overall cost and reduce the complexity of its overall structure, the three-phase rectifier stage adopts a diode uncontrolled rectification strategy. The equal pulse width modulation (EPWM) strategy is adopted for the high-frequency isolated DC-DC stage. The speed sensorless vector control strategy is adopted in the three-phase inverter stage. In this control strategy, the model reference adaptive system (MRAS) is used to estimate the speed of the asynchronous motor. A 0.75 kW three-phase asynchronous motor is used as the tested motor to verify the speed sensorless vector control strategy of high-frequency isolated variable frequency speed regulation for mine. The results show the following points. ① The voltage fluctuation of the DC bus on both sides of the high-frequency isolation DC-DC level is less than 10 V and the high-frequency square wave voltage is equal. The voltage waveforms of the primary single-phase inverter square wave and the high-frequency transformer coupled square wave are smooth and the overall steady-state performance is good. ② The three-phase inverter voltage and current waveform sine degree are good. The waveform is symmetrical and smooth. The three-phase inverter level stability performance is good, which meets the requirements of motor operation. ③ With the increase of time, the excitation current change is stable. The torque current responds quickly at startup. The torque current is large at the start-up stage, which can generate large torque. ④ The speed fluctuation of the motor is small in the stable phase. The waveforms of acceleration and deceleration phases tend to be a linear function, and the motor can start and stop smoothly. When the motor is just started, the maximum torque can reach more than 5 times of the stable torque, and the motor can be started quickly to work.
- high-frequency isolated inverter /
- frequency conversion speed regulation /
- speed sensorless vector control /
- model reference adaptive /
- asynchronous motor /
- inverter stage /
- high-frequency isolated DC-DC stage /
- rectifier stage

HTML全文

图 1 矿用高频隔离型变频调速主电路拓扑结构

Figure 1. Topology structure of main circuit of mine high frequency isolated variable frequency speed regulation

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图 2 高频隔离DC−DC级工作状态原理

Figure 2. Working state principle of high frequency isolated DC-DC stage

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图 3 高频隔离DC−DC级控制

Figure 3. High-frequency isolated DC-DC stage control

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图 4 MRAS基本结构

Figure 4. Basic structure of MRAS

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图 5 异步电动机无速度传感器矢量控制

Figure 5. Speed sensorless vector control of asynchronous motor

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图 6 矿用高频隔离型变频器电动机控制实验平台

Figure 6. Experimental platform for motor control of high frequency isolated mine frequency converter

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图 7 高频隔离DC−DC级实验波形

Figure 7. High-frequency isolated DC-DC experimental waveform

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图 8 三相逆变级实验波形

Figure 8. Experimental waveform of three-phase inverter stage

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图 9 电流i_d和i_q响应曲线

Figure 9. Current i_d and i_q response curves

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图 10 电动机转速和转矩实验结果

Figure 10. Results of motor speed and torque experiments

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表 1 三相异步电动机参数

Table 1. Parameters of three-phase asynchronous motor

参数	数值
额定功率/kW	0.750
额定转速/(r·min⁻¹)	1 390
满载电流/A	2.000
磁通互感量/mH	5.000
定子电感/mH	5.321

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表 2 矿用高频隔离型变频器参数

Table 2. Mine frequency converter parameters of high frequency isolation type

参数	数值
三相输入电抗器电感/mH	5.00
DC−DC变换器原边稳压电容/μF	15.91
DC−DC变换器副边稳压电容/μF	14.88
高频变压器变比	1
辅助电感/H	36.00
LC滤波器电容/μF	4.70
LC滤波器电感/mH	3.00
电动机加减速时间/s	10.00

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