Overview of Multi-functional Grid-connected Inverter and Its Application in Micro-grid

Zhang, Tieyan; Yang, Xuefeng; Zhao, Yan

doi:10.14257/ijgdc.2016.9.8.01

Cited by 2 publications

(4 citation statements)

References 32 publications

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“…In this paper, the expected improved bandwidth frequency f B is 1250 Hz (25th order harmonic) which is the highest harmonic current frequency of a single HCGI system. According to references [10][11][12][13][14][15][16], if K O_d is greater than 0.5 at high frequency section, the performance of harmonic compensation is acceptable. Besides, according to references [17][18][19][20][21], if the system gain K O_d smaller than 0.2, the resonant peak can be effectively suppressed.…”

Section: Design Of the Feedback Constantmentioning

confidence: 99%

“…Different from the traditional grid, which is equipped with active power filters to compensate the harmonic current, harmonic-compensation grid-connected inverters (HCGIs) having the function of harmonic-compensation while ensuring the power output are employed in distributed generation systems. The HCGIs cut the cost of harmonic compensation, reduce the device size, and greatly improve the equipment utilization rate of grid-connected inverters [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Wide Bandwidth Control for Multi-Parallel Grid-Connected Inverters with Harmonic Compensation

Deng

Song

et al. 2019

Energies

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This paper proposes a virtual impedance-based bandwidth control method for multi-parallel harmonic-compensation grid-connected inverters (HCGIs). Firstly, the influence of the resonance points caused by the interaction of multiple HCGIs on the control bandwidth is analyzed, and the analysis result shows that the control bandwidth becomes narrow due to the appearance of a new resonance point. Then, to increase the control bandwidth of multi-parallel HCGIs, six different types of virtual impedance circuits are constructed and compared, and the bandwidth control method based on virtual impedance by capacitor voltage feedback is proposed. Following that, the relationship between feedback coefficient and bandwidth is established, the design approach of parameters for the proposed method is presented. Finally, the proposed method is confirmed by the simulation and experimental tests. The simulation and experimental results show that the proposed control method can effectively shift resonance frequencies right to solve the issue of control bandwidth reduction in multi-parallel HCGIs systems, while without affecting the low-frequency harmonic current compensation.

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Section: Design Of the Feedback Constantmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wide Bandwidth Control for Multi-Parallel Grid-Connected Inverters with Harmonic Compensation

Deng

Song

et al. 2019

Energies

View full text Add to dashboard Cite

show abstract

“…or set the reactive power compensation devices such as capacitor, dynamic reactive power compensator etc. [2].…”

Section: Introductionmentioning

confidence: 99%

“…In [6], the multi‐objective economic function of the microgrid active power is established considering the respective characteristics of the distributed power supply, but they neglect the strong coupling between the output power of the distributed power supply and the power quality, and do not study the active power of the distributed power supply and the power quality problem which is influenced by it. In addition, we will use a large number of MFGCI when the distributed power supply access to the grid, in the microgrid they can assume energy exchange intermediary, but also bear the power quality control [2].…”

Section: Introductionmentioning

confidence: 99%