LCL Filter with Active Damping using PI and SSI Regulators in Synchronous Rotating Reference Frame Current Controller for DSTATCOM
-
Nagesh Geddada
and
Mahesh Kumar Mishra
Abstract
This article proposes a distribution static compensator (DSTATCOM) with interface LCL (inductor-capacitor-inductor) filter for load compensation in three-phase four-wire distribution system. DSTATCOM, consisting of voltage source inverter (VSI), is connected in parallel to the load and injects currents corresponding to load reactive, harmonic powers. But this injected current consists of unnecessary high-frequency switching ripple generated by VSI. This LCL filter has superior switching ripple attenuation capability compared to L filter. Moreover, this can be achieved with small value of overall LCL filter inductance than L filter. Thus providing high slew rate for output current to track the desired reference current closely, reducing voltage drop across it, as well as cost and size of filter. However, one major concern with LCL filter is its resonating frequency (determined from its L, C, L values), which can create high-resonance oscillating currents and results in improper load compensation. Therefore, in this study, proper design of LCL filter with high switching ripple attenuation and a current controller with proportional integral (PI) plus harmonic compensation (HC) regulators along with active damping feature of LCL filter in synchronous rotating reference (dq0) frame are presented. HC regulator minimizes the steady-state error in the non-sinusoidal filter currents (fundamental and harmonic) which are tracked by the VSI. Active damping feature (obtained by capacitor current feedback control of LCL filter) is used to overcome resonance oscillations and provides proper control, operation of DSTATCOM under steady-state and dynamic load conditions. Stability studies for designed LCL filter and current controller using Bode and root locus plots are also performed and presented. Extensive simulation study, to understand the compensation performance of LCL filter DSTATCOM with two types of current controllers (PI and PI plus HC) under steady-state and dynamic load conditions, is carried out in PSCAD simulator and the corresponding results along with THDs of various parameters are presented.
Acknowledgment
Authors would like to thank the Department of Science and Technology (DST), India (Project No.: DST/TM/SERI/2k10/47G) for providing financial assistance to this research work.
References
1. Yong J, Chen L, Chen S. Modeling of home appliances for power distribution system harmonic analysis. IEEE Trans Power Deliv 2010;25:3147–55.10.1109/TPWRD.2010.2051960Search in Google Scholar
2. Watson N, Scott T, Hirsch S. Implications for distribution networks of high penetration of compact fluorescent lamps. IEEE Trans Power Deliv 2009;24:1521–8.10.1109/TPWRD.2009.2014036Search in Google Scholar
3. Stones J, Collinson A Power quality. Power Eng J 2001;15:58–64.10.1049/pe:20010201Search in Google Scholar
4. Bollen M. What is power quality? Electric Power Syst Res 2003;66:5–14.10.1016/S0378-7796(03)00067-1Search in Google Scholar
5. Domijan A, Montenegro A, Keri AJF, Mattern KE. Custom power devices: an interaction study. IEEE Trans Power Syst 2005;20:1111–18.10.1109/TPWRS.2005.846101Search in Google Scholar
6. Ghosh A, Ledwich G. Load compensating DSTATCOM in weak ac systems. IEEE Trans Power Deliv 2003;18:1302–09.10.1109/TPWRD.2003.817743Search in Google Scholar
7. Parikshith BC Integrated approach to filter design for grid connected power converters. Master of Science Thesis, Indian Institute of Sciences, Bangalore, India, 2008.Search in Google Scholar
8. Singh B, Jayaprakash P, Kumar S, Kothari D. Implementation of neural-network-controlled three-leg VSC and a transformer as three-phase four-wire DSTATCOM. IEEE Trans Ind Appl 2011;47:1892–901.10.1109/TIA.2011.2153811Search in Google Scholar
9. Singh B, Solanki J. Load compensation for diesel generator-based isolated generation system employing DSTATCOM. IEEE Trans Ind Appl 2011;47:238–44.10.1109/TIA.2010.2090847Search in Google Scholar
10. Petterson S, Salo M, Tuusa H. Applying an LCL-filter to a four-wire active power filter. In 37th IEEE Power Electronics Specialists Conference, PESC 2006:1–7.Search in Google Scholar
11. Liserre M, Blaabjerg F, Hansen S. Design and control of an LCL-filter-based three-phase active rectifier. IEEE Trans Ind Appl 2005;41:1281–91.10.1109/TIA.2005.853373Search in Google Scholar
12. Qiu Z, Kong J, Chen G. A novel control approach for LCL-based shunt active power filter with high dynamic and steady-state performance. In IEEE Power Electronics Specialists Conference, 2008:3306–10.Search in Google Scholar
13. Zhong X, Hong L, Chen X, Chen G. Design and implementation of compound current control strategy for improved LCL-based shunt active power filter. In IECON 2012–38th Annual Conference on IEEE Industrial Electronics Society, 2012:339–44.10.1109/IECON.2012.6388623Search in Google Scholar
14. Zheng Z, Jiaqiang Y, Nianchang Y. Research on pi and repetitive control strategy for shunt active power filter with LCL-filter. In 7th International Power Electronics and Motion Control Conference (IPEMC), volume 4, 2012:2833–7.Search in Google Scholar
15. Tang Y, Loh PC, Wang P, Choo FH, Gao F, Blaabjerg F. Generalized design of high performance shunt active power filter with output LCL filter. IEEE Trans Ind Electron 2012;59:1443–52.10.1109/TIE.2011.2167117Search in Google Scholar
16. Zeng G, Rasmussen T, Ma L, Teodorescu R. Design and control of LCL-filter with active damping for active power filter. In IEEE International Symposium on Industrial Electronics (ISIE), 2010:2557–62.Search in Google Scholar
17. Tavakoli Bina M, Pashajavid E. 2009. An efficient procedure to design passive LCL filters for active power filters. Electric Power Syst Res 2009;79:606–14.10.1016/j.epsr.2008.08.014Search in Google Scholar
18. Dahono P. A method to damp oscillations on the input LC filter of current-type AC-DC PWM converters by using a virtual resistor. In The 25th International Telecommunications Energy Conference, 2003.Search in Google Scholar
19. Zhao W, Chen G. Comparison of active and passive damping methods for application in high power active power filter with LCL-filter. In International Conference on Sustainable Power Generation and Supply, 2009:1–6.Search in Google Scholar
20. Bojoi R, Griva G, Bostan V, Guerriero M, Farina F, Profumo F. Current control strategy for power conditioners using sinusoidal signal integrators in synchronous reference frame. IEEE Trans Power Electron 2005;20:140212.10.1109/TPEL.2005.857558Search in Google Scholar
21. Lascu C, Asiminoaei L, Boldea I, Blaabjerg F. High performance current controller for selective harmonic compensation in active power filters. IEEE Trans Power Electron 2007;22:1826–35.10.1109/TPEL.2007.904060Search in Google Scholar
22. Tang Y, Loh PC, Wang P, Choo FH, Gao F. Exploring inherent damping characteristic of LCL-filters for three-phase grid-connected voltage source inverters. IEEE Trans Power Electron 2012;27:1433–43.10.1109/TPEL.2011.2162342Search in Google Scholar
23. Singh B, Pychadathil J, Kothari DP. Star/hexagon transformer based three-phase four-wire DSTATCOM for power quality improvement. Int J Emerg Electric Power Syst 2008;9:1–20.10.2202/1553-779X.1983Search in Google Scholar
24. Panda AK, Mikkili S. Fuzzy logic controller based shunt active filter control strategies for power quality improvement using different fuzzy MFS. Int J Emerg Electric Power Syst 2012;13:2.Search in Google Scholar
25. Herrera R, Salmeron P. Instantaneous reactive power theory: a reference in the nonlinear loads compensation. IEEE Trans Ind Electron 2009;56:2015–22.10.1109/TIE.2009.2014749Search in Google Scholar
26. Karthikeyan K, Kumar Mishra M. A novel load compensation algorithm under unbalanced and distorted supply voltages. Int J Emerg Electric Power Syst 2007;8:1–18.10.2202/1553-779X.1612Search in Google Scholar
27. Milosevic M. Decoupling control of d and q current components in three-phase voltage source inverter. Technical report, Technical report, ETH Zurich, 2003.Search in Google Scholar
28. Bahrani B, Kenzelmann S, Rufer A. Multivariable-pi-based dq current control of voltage source converters with superior axis decoupling capability. IEEE Trans Ind Electron 2011;58:3016–26.10.1109/TIE.2010.2070776Search in Google Scholar
©2013 by Walter de Gruyter Berlin / Boston
Articles in the same Issue
- Masthead
- Masthead
- An Investigation into the Physico-chemical Properties of Transformer Oil Blends with Antioxidants extracted from Turmeric Powder
- Prediction of Egyptian 500-kV Overhead Transmission Line’s Radio Interference by Using the Excitation Function
- LCL Filter with Active Damping using PI and SSI Regulators in Synchronous Rotating Reference Frame Current Controller for DSTATCOM
- Review
- A Comprehensive Overview of Different Protection Schemes in Micro-Grids
- DC–DC Type High-Frequency Link DC for Improved Power Quality of Cascaded Multilevel Inverter
- An Empirical Study of Synchrophasor Communication Delay in a Utility TCP/IP Network
- Power Management Based Current Control Technique for Photovoltaic-Battery Assisted Wind–Hydro Hybrid System
- Development of Wave Turbine Emulator in a Laboratory Environment
- Erratum
- Online Assessment of Voltage Stability in Power Systems with PMUs
Articles in the same Issue
- Masthead
- Masthead
- An Investigation into the Physico-chemical Properties of Transformer Oil Blends with Antioxidants extracted from Turmeric Powder
- Prediction of Egyptian 500-kV Overhead Transmission Line’s Radio Interference by Using the Excitation Function
- LCL Filter with Active Damping using PI and SSI Regulators in Synchronous Rotating Reference Frame Current Controller for DSTATCOM
- Review
- A Comprehensive Overview of Different Protection Schemes in Micro-Grids
- DC–DC Type High-Frequency Link DC for Improved Power Quality of Cascaded Multilevel Inverter
- An Empirical Study of Synchrophasor Communication Delay in a Utility TCP/IP Network
- Power Management Based Current Control Technique for Photovoltaic-Battery Assisted Wind–Hydro Hybrid System
- Development of Wave Turbine Emulator in a Laboratory Environment
- Erratum
- Online Assessment of Voltage Stability in Power Systems with PMUs
