Grid Integration of Solar PV Using UPQC with Differential Inverter Control

Authors

  • M. Kondalu
  • Alupula Varun Kumar

Keywords:

UPQC, PV system, Power Quality

Abstract

Ensuring voltage stability in integrated photovoltaic (PV) distribution systems is essential for the reliable operation of all connected devices within the network. One of the primary challenges in PV system integration is maintaining a stable voltage profile. This study focuses on stabilizing the voltage profile for a sensitive load of 22 kVA. A single-phase distribution system with PV integration serves as the basis for this analysis. The innovation lies in the use of differential inverters functioning as both a dynamic voltage restorer and a distribution static synchronous compensator within a unified power quality conditioner (UPQC). A key benefit of employing differential inverters is their capability for active power decoupling. The main goal of this research is to connect a 10-kW solar PV system to the distribution network using the proposed UPQC configuration. The study identifies and evaluates the most effective control strategy for the UPQC integrated with a battery energy storage system. A 20 kVA UPQC is designed specifically for enhancing voltage stability and supporting PV integration in the distribution network, with assumptions of constant frequency, voltage, and reactance-to-resistance (X/R) ratio.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

F.Z.Peng,“Flexible ACtransmissionsystems(FACTS)andresilient ACdistribution systems(RACDS)insmartgrid,”Proc.IEEE,vol.105,no.11,pp.2099–2115,Nov.2017.

E. Rakhshani, D. Remon, A. M. Cantarellas, J. M. Garcia, and P. Rodriguez, “Virtual synchronous power strategy for multiple HVDC interconnections of multi-area AGC power systems,” IEEE Trans. Power Syst., vol. 32, no. 3, pp. 1665–1677, May. 2017.

W. Litzenberger, K. Mitsch, and M. Bhuiyan, “When it’s time to upgrade: HVdc and FACTS renovation inthe westernpowersystem,” IEEE PowerEnergyMag., vol. 14, no. 2, pp. 32–41, Mar. 2016.

M. Andresen, K. Ma, G. De Carne, G. Buticchi, F. Blaabjerg, and M. Liserre, “Thermal stress analysis of medium-voltage converters for smart transformers,” IEEE Trans. Power Electron., vol. 32, no. 6, pp. 4753–4765, Jun. 2017.

S. Yang, Y. Liu, X. Wang, D. Gunasekaran, U. Karki, and F. Z. Peng, “Modulation and control of transformerless UPFC,” IEEE Trans. Power Electron., vol. 31, no. 2, pp. 1050–1063, Feb. 2016.

C. Liang et al., “Harmonic elimination using parallel delta-connected filtering windingsforconvertertransformersinHVDCsystems,”IEEETrans.PowerDel.,vol.32, no. 2, pp. 933–941, Apr. 2017.

C.Wang,X.Yin,Z.ZhangandM. Wen,“Anovelcompensationtechnologyofstatic synchronous compensator integrated with distribution transformer,” IEEE Trans. Power Del., vol. 28, no. 2, pp. 1032–1039, Apr. 2013.

B. B. Ambati and V. Khadkikar, “Variable frequency transformer configuration for decoupledactive-reactivepowerstransfercontrol,”IEEETrans.EnergyConvers.,vol.31, no. 3, pp. 906–914, Sep. 2016.

J. Liu and V. Dinavahi, “Nonlinear magnetic equivalent circuit-based real-time sen transformer electromagnetic transient model on FPGA for HIL emulation,” IEEE Trans. Power Del., vol. 31, no. 6, pp. 2483–2493, Dec. 2016.

L.FerreiraCosta,G.DeCarne,G.Buticchi,andM.Liserre,“Thesmarttransformer: A solid-state transformer tailored to provide ancillary services to the distribution grid,” IEEE Power Electron. Mag., vol. 4, no. 2, pp. 56–67, Jun. 2017.

M. A. Elsaharty, J. Rocabert, I. Candela, and P. Rodriguez, “Three-Phase custom power active transformer for power flow control applications,” IEEE Trans. Power Electron., vol. 34, no. 3, pp. 2206–2219, Mar. 2019.

M.A.Elsaharty,J.I.Candela,andP.Rodriguez,“Powersystemcompensationusing a power electronics integrated transformer”, IEEE Trans. Power Del., vol. 33, no. 4, pp. 1744–1754, Aug. 2018.

Downloads

Published

2025-05-23

How to Cite

1.
Kondalu M, Kumar AV. Grid Integration of Solar PV Using UPQC with Differential Inverter Control. J Neonatal Surg [Internet]. 2025May23 [cited 2025Oct.4];14(27S):122-6. Available from: https://www.jneonatalsurg.com/index.php/jns/article/view/6400

Issue

Vol. 14 No. 27S (2025): Journal of Neonatal Surgery

Section

Original Article

License

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

You are free to:

  • Adapt — remix, transform, and build upon the material for any purpose, even commercially.

Terms:

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.