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frequency conversion control of photovoltaic grid-connected inverter based on LCL filtering

INTERNATIONAL JOURNAL OF LOW-CARBON TECHNOLOGIES 2021年第4期16卷 1341-1347页

作者： Xiao, Dongyue Nanyang Inst Technol Sch Intelligent Mfg Nanyang 473000 Peoples R China

Aiming at the problem that the filtering effect of inductor capacitance inductor (LCL) filter becomes worse when the Photovoltaic (PV) system works at low power, this paper presents a control strategy to change the switching frequency according to the instantaneous output power of the inverter. By analyzing the design method of each parameter of LCL filter, a single-stage PV grid-connected inverter structure is used to establish the frequency loop based on grid voltage-oriented vector control to determine the optimal switching frequency under the current power state. The design methods of power detector, frequency calculation and frequency hysteresis comparator are analyzed in detail. Finally, the waveforms of grid-connected current before and after frequency conversion are contrasted by MATLAB simulation to verify the feasibility and effectiveness of the inverter control strategy.

关键词： frequency conversion control LCL frequency loop power quality

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Study on new frequency conversion control system and power balance control method of dual-motor for shearer traction unit

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ADVANCES IN MECHANICAL ENGINEERING 2022年第7期14卷

作者： Mao, Qinghua Lu, Maomao Zhang, Xuhui Zeng, Min Zhao, Jianbo Li, Shikun Xian Univ Sci & Technol Coll Mech & Engn 58 Middle Yanta Rd Xian 710000 Shaanxi Peoples R China Xian Univ Sci & Technol Key Lab Intelligent Monitoring Mine Electromech E Xian Shaanxi Peoples R China Nanchang Inst Sci & Technol Nanchang Jiangxi Peoples R China

The drive system of shearer traction unit is affected by complex load interference and system structure, which results in the problem of unbalanced power of dual-motor of shearer traction unit. A new type of dual-motor frequency conversion control system for shearer traction unit with "common rectification and dual inverters" is designed. And a dual-motor power balance control method based on particle swarm optimization torque cross-coupled control is proposed. The new frequency conversion control system adopts a parallel structure of two inverter circuits with a common DC bus. Particle swarm optimization is used to optimize the PID control parameters of torque cross-coupling control, which solves the problem that it is difficult to gain optimal PID parameters. The control model is established using Matlab/Simulink simulation software. The proposed control method and the master-slave control method are compared by simulation. The results show that the control effect of proposed control method is better synchromization and power balance effect than the master-slave control method. The proposed control method is applied to dual-motor control of shearer traction unit for experimental verification. The results indicate that the proposed power balance control method realizes that the output torque ratio of dual-motor is between 0.9 and 1.1.

关键词： Shearer traction unit frequency conversion control power balance cross-coupled control PSO

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frequency conversion control Module Design for Electric Cars Based on SVPWM

Frequency Conversion Control Module Design for Electric Cars...

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International Conference on Business, Economics, and Financial Sciences, Management (BEFM 2011)

作者： Feng, Wei Di, Changan Bian, Peng Kong, Deren Duan, Zhenwei Nanjing Univ Sci & Technol Sch Mech Engn Xian Modern Chem Res Inst Nanjing 210094 Jiangsu Peoples R China Nanjing Univ Sci & Technol Nanjing 210094 Jiangsu Peoples R China Nanjing Univ Sci & Technol North Huaan Indust Grp Co Ltd Nanjing 210094 Jiangsu Peoples R China

ISBN: (纸本)9783642279652

In order to increase electric cars power efficiency when control frequency conversion, and reduce the interference of high harmonics, we propose a design method of voltage space vector (SVPWM) frequency conversion control module. Based on TMS320LF2407 the PWM signal producing module design, IPM module as the core, we design the inverter circuit and Developed SVPWM real-time motion control program. This program use the manner of segmentation modulation, achieve frequency conversion control a range of 5 similar to 100Hz frequency. Variable frequency speed-governing experiment shows that, The control method can reduce the switching losses, meanwhile suppress the temperature rise.

关键词： frequency conversion control SVPWM DSP IPM

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frequency conversion control for vibration mill with high vibration intensity based on multi-wave variable sinusoid

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2nd International Conference on Advanced Engineering Materials and Technology (AEMT)

作者： Yang, Xiaolan Jia, Minping Zou, Jingchao Liu, Jifeng Xv, Fangmin Nanjing Inst Technol Coll Mech Engn Nanjing 210013 Jiangsu Peoples R China Southeast Univ Coll Mech Engn Nanjing 211176 Jiangsu Peoples R China Huanghe S & T Univ Coll Engn Zhengzhou 450015 Peoples R China

ISBN: (纸本)9783037854471

The key technology of vibration machine to finish deaggregation and powder refinement is both high vibration Intensity with a certain frequency and steady vibration of frequency conversion control. A frequency conversion control for vibration mill system based on multi-wave variable sinusoidal frequency ascending and descending cycle curve was developed. The frequency conversion control test of vibration mill was finished through sensing signal amplification, analog digital conversion and on line detection. The results show that the high and super-high vibration intensity with certain action time is produced and the effect of multi-amplitude and multi-frequency is acquired. The experimental data show that the super micro grinding of superfine particles is achieved, energy consumption is reduced, the useful life of wearing parts such as bearing is extended, and engineering effects of deaggregation and refinement of super-hard superfine powder are obtained by frequency conversion control.

关键词： multi-wave variable sinusoid vibration frequency cycle curve high vibration intensity vibration mill frequency conversion control

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Application of Self-adjustment PID Fuzzy controller in Inverter Air-conditioning control System

Application of Self-adjustment PID Fuzzy Controller in Inver...

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4th International Conference on Graphic and Image Processing (ICGIP)

作者： Jiang Jing Zhang Xuesong China Univ Min & Technol Beijing North China Inst Sci & Technol Beijing 101601 Peoples R China North Inst Elect Elctro Opt Informat Secur Control Lab Hebei 065201 Peoples R China

ISBN: (纸本)9780819495662

Two-dimensional fuzzy temperature controller was used in the system of inverter air-conditioner to control the room temperature. Self-adjustment PID fuzzy controller was proposed to realize real-time control function. V / F control mode was used to compensate with low voltage, the average sampling algorithm was proposed to implement SPWM waveform modulation. Finally, the feasibility of self-adjustment PID fuzzy controller was verified by simulation, the actual operation results had proved that self-adjustment PID fuzzy controller had reliable, good output waveform and small harmonic wave, which could meet operational requirements of inverter air-conditioner.

关键词： Parameters Self-adjustment PID controller frequency conversion control Fuzzy controller

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Research of SVPWM Algorithm in Using control System of Variable-frequency Air-Condition

Research of SVPWM Algorithm in Using Control System of Varia...

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Measurement Touch the World——IEEE 2011 10th International Conference on Electronic Measurement & Instruments(ICEMI’2011)

作者： Shen Zhaojun Chen Rong YANCHEN Institute of Information Engineering College Yanchen 224003 China

Proposed the advanced SVPWM algorithm for realization with the air conditioning compressor frequency conversion *** changing the power frequency make motor speed change and achieve to control capacity of air conditioner *** has carried on the theoretical analysis and the research to this *** on the basic idea of space vector modulation,by integration of software and hardware,realizing method of PWM waves generated by DSP PWM module in interrupt,and gave the test *** testified that using DSP to achieve SVPWM have some excellences ,such as simple control arithmetic,high speed and convenient realization.

关键词： SVPWM DSP frequency conversion control

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Inverter Air-conditioning control System Using PID Fuzzy controller

Inverter Air-conditioning Control System Using PID Fuzzy Con...

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23rd Chinese control and Decision Conference

作者： Jiang Jing Zhang Xuesong North China Inst Sci & Technol Beijing 101601 Peoples R China Northeast Inst Elect Technol Electroopt Informat Secur Control Lab Sanhe 065201 Hebei Peoples R China

ISBN: (纸本)9781424487363

In this paper, temperature fuzzy controller was designed in the inverter cold and hot air-condition. The control system for inverter air conditioner was divided indoor machine and the outdoor machine. frequency control was realized by design of hardware circuit and two-dimensional temperature controller was selected in the fuzzy control program. PID fuzzy controller suitable for real-time control was proposed. Finally, the practicability of self-adjust PID fuzzy controller was confirmed by simulation curve. It was shown that self-adjust PID fuzzy controller had a better control performance than conventional fuzzy control methods.

关键词： PID fuzzy controller frequency conversion control Single-chip microcomputer Fuzzy control

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Application of Self-adjustment PID Fuzzy controller in Inverter Air-conditioning control System

Application of Self-adjustment PID Fuzzy Controller in Inver...

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2011 4th IEEE International Conference on Computer Science and Information Technology(ICCSIT 2011)

作者： JIANG Jing ZHANG Xuesong North China Institute of Science and Technology China University of Mining and Technology Electro-optical Information Security Control Laboratory Northeast Institute of Electronics Technology

ISBN: (纸本)9781612848334

Two-dimensional fuzzy temperature controller was used to control the room temperature in the system of inverter air-conditioner,self-adjustment PID fuzzy controller was proposed to realize the function of real-time *** control mode of V /F was used to compensate with low *** average sampling algorithm was proposed to implement SPWM waveform ***,the feasibility of selfadjustment PID fuzzy controller was verified by simulation *** actual operation results had proved that selfadjustment PID fuzzy controller had reliable,good output waveform and small harmonic wave,which could meet operational requirements of inverter air-conditioner.

关键词： Parameters Self-adjustment PID Fuzzy controller frequency conversion control fuzzy controller

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Temperature control System of Air-conditioning Based on the Fuzzy Theory

Temperature Control System of Air-conditioning Based on the ...

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2011 IEEE International Conference Mechatronics and Automation(2011 IEEE机电一体化与自动化国际会议)

作者： JIANG Jing ZHANG Xuesong China University of Mining and Technology (Beijing)Science and Technology on Electro-optical Informa Science and Technology on Electro-optical Information Security Control Laboratory Northeast Institut

关键词： Parameters Self-adjustment PID Fuzzy controller frequency conversion control fuzzy controller

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