Author(s)

Jiashun Zhu ¹, Wen Li ¹, Xinyu Miao ², Tiansheng Sun ¹, Jingyan Min ¹

Affiliation(s)

¹ School of Electrical Engineering, Yingkou Institute of Technology, Yingkou, 115000, China
² Yingkou Abe Wiring Co., Ltd., Yingkou, 115000, China

Corresponding Author

Wen Li

ABSTRACT

With the increasing grid-connection applications of power collection systems, their power electronic devices are prone to introducing reactive power loss, which affects the power quality of the power grid. A Static Var Generator (SVG) is therefore required to ensure grid-connection performance. This paper designs the SVG main circuit for power collection systems based on a voltage-source bridge circuit. Under ideal assumptions, a mathematical model in the abc coordinate system is established, where the on-off characteristics of devices are described by switching functions. A decoupled model in the dq coordinate system is then derived through 3s/2s and 2s/2r coordinate transformations. A grid voltage-oriented double closed-loop control strategy is adopted: the outer loop stabilizes the DC-side voltage using a PI controller, the inner loop tracks reactive current, and an intermediate voltage is introduced to eliminate variable coupling. Meanwhile, SPWM and SVPWM modulation modules are constructed. A simulation model is built based on MATLAB/Simulink (grid line voltage 400V, load 200kW active power/100kvar reactive power, grid-connection inductor 1mH, DC voltage 800V). The results show that: without SVG, the grid power factor is 0.894; after SVG operation, the voltage and current phases align within 0.15s, the power factor approaches 1, and the DC voltage stabilizes at 800V within 0.07s. The current THD is 1.49% with SPWM modulation and decreases to 1.30% with SVPWM. The research indicates that the SVG simulation model can meet the reactive power compensation requirements of power collection system grid-connection, improving the power quality and stability of the grid-connection side.

KEYWORDS

Power Collection System; Static Var Generator (SVG); Grid-Connection Control; Reactive Power Compensation

CITE THIS PAPER

Jiashun Zhu, Wen Li, Xinyu Miao, Tiansheng Sun, Jingyan Min, Construction and Grid-Connection Control Verification of SVG Simulation Model for Power Collection Systems. Journal of Electronics and Information Science (2025) Vol. 10: 114-127. DOI: http://dx.doi.org/10.23977/10.23977/jeis.2025.100214.

REFERENCES

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