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Changqi Qu - IEEE Xplore Author Profile
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Changqi Qu

Publications
10
Citations
659
Publications by Year
20142017
Co-Authors:
Show All Co-Authors (7)
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Changqi Qu

Affiliation

Inverter Technologies Engineering Research Center of Beijing
North China University of Technology
Beijing, China

Publication Topics

Biography

Changqi Qu was born in 1988. He received the B.S. degree from Beijing Jiaotong University, Beijing, China, in 2009, and the master's degree from the North China University of Technology, Beijing, in 2015, both in electrical engineering.,His research interest include control of pulse-width modulation rectifiers under unbalanced grid voltages.(Based on document published on 28 July 2016).
Publications
10
Citations
659
Publications by Year
20142017
Co-Authors:
Show All Co-Authors (7)
Author's Published Works

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Relationship Between Two Direct Power Control Methods for PWM Rectifiers Under Unbalanced Network

Yongchang Zhang;Jihao Gao;Changqi Qu

IEEE Transactions on Power Electronics
Year: 2017 | Volume: 32, Issue: 5 | Journal Article |
Cited by: Papers (83)
Active power control plays an important role in a pulse width modulation (PWM) rectifier under both balanced and unbalanced network conditions. The prior methods to achieve active power oscillation cancellation (APOC) under unbalanced grid voltages are usually implemented by forcing the grid current to track appropriate current references. They require fine tuning work of a current controller and ...Show More

Relationship Between Two Direct Power Control Methods for PWM Rectifiers Under Unbalanced Network

Yongchang Zhang;Jihao Gao;Changqi Qu

Year: 2017 | Volume: 32, Issue: 5 | Journal Article |

Performance Improvement of Direct Power Control of PWM Rectifier Under Unbalanced Network

Yongchang Zhang;Changqi Qu;Jihao Gao

IEEE Transactions on Power Electronics
Year: 2017 | Volume: 32, Issue: 3 | Journal Article |
Cited by: Papers (64)
Direct power control (DPC) has attracted wide attention due to its advantages of simple structure, quick response, strong robustness, and elimination of current regulation/pulse width modulation blocks. However, conventional table-based DPC cannot work well when the grid voltages are unbalanced. Some work has been done on DPC to mitigate the influence of grid unbalance by adding power compensation...Show More

Performance Improvement of Direct Power Control of PWM Rectifier Under Unbalanced Network

Yongchang Zhang;Changqi Qu;Jihao Gao

Year: 2017 | Volume: 32, Issue: 3 | Journal Article |

Model Predictive Control and Direct Power Control for PWM Rectifiers With Active Power Ripple Minimization

Yongchang Zhang;Yubin Peng;Changqi Qu

IEEE Transactions on Industry Applications
Year: 2016 | Volume: 52, Issue: 6 | Journal Article |
Cited by: Papers (81)
Direct power control (DPC) and model predictive control (MPC) are two well-known methods to achieve direct control of active power and reactive power in pulse-width modulation rectifiers. They both select a voltage vector, according to a switching table or by minimizing a cost function, and then apply it in the next control period. The use of only one voltage vector during one control period leads...Show More

Model Predictive Control and Direct Power Control for PWM Rectifiers With Active Power Ripple Minimization

Yongchang Zhang;Yubin Peng;Changqi Qu

Year: 2016 | Volume: 52, Issue: 6 | Journal Article |

Comparative study of model predictive control and direct power control for PWM rectifiers with active power ripple minimization

Yongchang Zhang;Yubin Peng;Changqi Qu

2015 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2015 | Conference Paper |
Cited by: Papers (11)
Direct power control (DPC) and model predictive control (MPC) are two well known methods to achieve direct control of active power and reactive power in PWM rectifiers. They both select a voltage vector, according to a switching table or by minimizing a cost function, and then apply it in the next control period. The use of only one voltage vector during one control period leads to high power ripp...Show More

Comparative study of model predictive control and direct power control for PWM rectifiers with active power ripple minimization

Yongchang Zhang;Yubin Peng;Changqi Qu

Year: 2015 | Conference Paper |

Direct power control of PWM rectifier with optimal duty ratio under unbalanced network

Yongchang Zhang;Changqi Qu;Zhengxi Li;Yingchao Zhang;Longhan Cao

2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)
Year: 2015 | Conference Paper |
Cited by: Papers (7)
Direct power control (DPC) attracted wide attention due to its advantages of simple structure, quick response, strong robustness and elimination of current regulation/PWM blocks. However, conventional table-based DPC cannot work well when grid voltage is unbalanced. This paper proposes an improved DPC by using a new definition of instantaneous reactive power. As a result, the distortion in grid cu...Show More

Direct power control of PWM rectifier with optimal duty ratio under unbalanced network

Yongchang Zhang;Changqi Qu;Zhengxi Li;Yingchao Zhang;Longhan Cao

Year: 2015 | Conference Paper |

Model Predictive Direct Power Control of PWM Rectifiers Under Unbalanced Network Conditions

Yongchang Zhang;Changqi Qu

IEEE Transactions on Industrial Electronics
Year: 2015 | Volume: 62, Issue: 7 | Journal Article |
Cited by: Papers (163)
Model predictive direct power control (MPDPC) has been proposed as an effective alternative to conventional direct power control for pulsewidth-modulation (PWM) rectifiers. However, the sampling frequency of MPDPC still has to be high to achieve satisfactory performance. Furthermore, the grid currents of MPDPC would become highly distorted under unbalanced network conditions. To cope with the prob...Show More

Model Predictive Direct Power Control of PWM Rectifiers Under Unbalanced Network Conditions

Yongchang Zhang;Changqi Qu

Year: 2015 | Volume: 62, Issue: 7 | Journal Article |

Table-Based Direct Power Control for Three-Phase AC/DC Converters Under Unbalanced Grid Voltages

Yongchang Zhang;Changqi Qu

IEEE Transactions on Power Electronics
Year: 2015 | Volume: 30, Issue: 12 | Journal Article |
Cited by: Papers (89)
This paper proposes a simple but effective direct power control (DPC) strategy for three-phase ac/dc converters operating under unbalanced grid voltage conditions. An extended instantaneous power theory is adapted and applied in the proposed DPC, where the reactive power is expressed in the form of dot product of grid currents and delayed grid voltages. Neither complicated positive/negative sequen...Show More

Table-Based Direct Power Control for Three-Phase AC/DC Converters Under Unbalanced Grid Voltages

Yongchang Zhang;Changqi Qu

Year: 2015 | Volume: 30, Issue: 12 | Journal Article |

Direct Power Control of a Pulse Width Modulation Rectifier Using Space Vector Modulation Under Unbalanced Grid Voltages

Yongchang Zhang;Changqi Qu

IEEE Transactions on Power Electronics
Year: 2015 | Volume: 30, Issue: 10 | Journal Article |
Cited by: Papers (154)
Compared with conventional table-based direct power control (DPC), DPC using space vector modulation (DPC-SVM) exhibits several specific features, such as a constant switching frequency and small ripples in both active power and reactive power. However, conventional DPC-SVM exhibits highly distorted grid currents when the grid voltages are unbalanced. In this study, we propose a novel and simple D...Show More

Direct Power Control of a Pulse Width Modulation Rectifier Using Space Vector Modulation Under Unbalanced Grid Voltages

Yongchang Zhang;Changqi Qu

Year: 2015 | Volume: 30, Issue: 10 | Journal Article |

Direct power control of PWM rectifier under unbalanced grid voltage

Yongchang Zhang;Changqi Qu;Zhengxi Li;Yingchao Zhang

2014 17th International Conference on Electrical Machines and Systems (ICEMS)
Year: 2014 | Conference Paper |
Cited by: Papers (2)
PWM rectifier controlled by direct power control (DPC) is characterized by the merits of quick response, no need of inner current tuning and strong robustness, etc. However, conventional table-based DPC cannot work properly when the grid voltage is unbalanced. Various methods have been proposed to mitigate the influence of grid unbalance but they are usually complicated and require positive/negati...Show More

Direct power control of PWM rectifier under unbalanced grid voltage

Yongchang Zhang;Changqi Qu;Zhengxi Li;Yingchao Zhang

Year: 2014 | Conference Paper |

An improved direct power control of PWM rectifier with active power ripple minimization

Yongchang Zhang;Changqi Qu;Zhengxi Li;Wei Xu

2014 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2014 | Conference Paper |
Cited by: Papers (5)
This paper presents an improved direct power control (DPC) to achieve active power ripple minimization for three-phase PWM rectifiers. Conventional switching-table-based DPC (STDPC) selects only one voltage vector from a heuristic switching table for the whole control period, leading to high power ripples at steady state. Contrary to STDPC, the proposed DPC divides the control period into two inte...Show More

An improved direct power control of PWM rectifier with active power ripple minimization

Yongchang Zhang;Changqi Qu;Zhengxi Li;Wei Xu

Year: 2014 | Conference Paper |

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