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RISS 인기검색어
- 검색키워드
- 저자 : Guofei Teng (검색결과 5 건)
- 무료
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Control Strategy Based on Equivalent Fundamental and Odd Harmonic Resonators for Single-Phase DVRs
Teng, Guofei,Xiao, Guochun,Hu, Leilei,Lu, Yong,Kafle, Yuba Raj The Korean Institute of Power Electronics 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.4
In this paper, a digital control strategy based on equivalent fundamental and odd harmonic resonators is proposed for single-phase DVRs. By using a delay block, which can be equivalent to a bank of resonators, it rejects the fundamental and odd harmonic disturbances effectively. The structure of the single closed-loop control system consists of a delay block, a proportional gain and a set of zero phase notch filters. The principle of the controller design is discussed in detail to ensure the stability of the system. Both the supply voltage and the load current feedforwards are used to improve the response speed and the ability to eliminate disturbances. The proposed controller is simple in terms of its structure and implementation. It has good performances in harmonic compensation and dynamic response. Experimental results from a 2kW DVR prototype confirm the validity of the design procedure and the effectiveness of the control strategy.
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Control Strategy Based on Equivalent Fundamental and Odd Harmonic Resonators for Single-Phase DVRs
Guofei Teng,Guochun Xiao,Leilei Hu,Yong Lu,Yuba Raj Kafle 전력전자학회 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.4
In this paper, a digital control strategy based on equivalent fundamental and odd harmonic resonators is proposed for single-phase DVRs. By using a delay block, which can be equivalent to a bank of resonators, it rejects the fundamental and odd harmonic disturbances effectively. The structure of the single closed-loop control system consists of a delay block, a proportional gain and a set of zero phase notch filters. The principle of the controller design is discussed in detail to ensure the stability of the system. Both the supply voltage and the load current feedforwards are used to improve the response speed and the ability to eliminate disturbances. The proposed controller is simple in terms of its structure and implementation. It has good performances in harmonic compensation and dynamic response. Experimental results from a 2kW DVR prototype confirm the validity of the design procedure and the effectiveness of the control strategy.
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Phase Shift Control for Series Active Voltage Quality Regulators
Xiao, Guochun,Teng, Guofei,Chen, Beihai,Zhang, Jixu The Korean Institute of Power Electronics 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.4
A phase shift algorithm based on the closed-loop control of dc-link voltage implemented on a series active voltage quality regulator (AVQR) is proposed in this paper. To avoid pumping-up the dc-link voltage, a general phase shift compensation strategy is applied. The relationships among the operation variables are discussed in detail, which is very important for guiding the design of both the main circuit and the control system. Then on the basis of an investigation of the dc-link voltage pumping-up from viewpoint of the active power flow, a novel phase shift control method based on the closed-loop of the dc-link voltage is proposed. This method can adjust the phase of the output voltage gradually and automatically according to the dc-link voltage variation without introducing a phase jump. The effectiveness of the proposed strategy is verified through simulations of a single-phase 5kVA prototype and laboratory experiments on both a single-phase 5kVA and a three-phase 15kVA prototype.
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Phase Shift Control for Series Active Voltage Quality Regulators
Guochun Xiao,Guofei Teng,Beihai Chen,Jixu Zhang 전력전자학회 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.4
A phase shift algorithm based on the closed-loop control of dc-link voltage implemented on a series active voltage quality regulator (A VQR) is proposed in this paper. To avoid pumping-up the dc-link voltage, a general phase shift compensation strategy is applied. The relationships among the operation variables are discussed in detail, which is very important for guiding the design of both the main circuit and the control system. Then on the basis of an investigation of the dc-link voltage pumping-up from viewpoint of the active power flow, a novel phase shift control method based on the closed-loop of the dc-link voltage is proposed. This method can adjust the phase of the output voltage gradually and automatically according to the dc-link voltage variation without introducing a phase jump. The effectiveness of the proposed strategy is verified through simulations of a single-phase SkV A prototype and laboratory experiments on both a single-phase SkV A and a three-phase ISkV A prototype.
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Ye Zhuhuan,Xiao Guochun,Zeng Zhong,Teng Guofei,Jia Yaoqin 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
In this paper, a new control scheme of a proportional resonant (PR) + harmonic compensation (HC) combined with inductor current state feedback and load current feed-forward for an Active Voltage Quality Regulator is proposed. The inductor current state feedback is used to enhance the stability and increase the damping factor to eliminate the resonant peak of output LC filter. The load current feed forward is implemented to compensate the voltage drop due to the inductor state feedback and suppress the load disturbance. Meanwhile, a combined PR and HC control structure is added into the outer voltage regulation loop to achieve zero steady-state error and compensate harmonics respectively. Theoretical analysis has been achieved and the analytical results are validated by simulation studies and experimental tests on a single-phase 2㎸A prototype, which verify the feasibility and effectiveness of the proposed controller.
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