A Novel Non-Linear Control for Three-Phase Five-Level Cascaded H-Bridge Inverter Based Shunt Active Power Filter
-
Soumyadeep Ray
,
Nitin Gupta
Abstract
Cascaded H-Bridge multilevel inverter (CHB-MLI) based shunt active power filter (SAPF) provides a cost-worthy and realistic solution for mitigating current related power quality problems in case of medium-voltage and high-power grid. Mitigation of current harmonic component, reactive power minimization and power factor correction depend on accuracy of control technique applied to the CHB-MLI based SAPF unit. Switching technique dynamics is not considered by most of the researchers while designing control techniques applied to SAPF unit and hence it is assumed linear in order to make system simpler. A limited amount of literature is available which considers the non-linearity of CHB-MLI switching pattern while designing control theory for MLI based SAPF. Therefore, a novel non-linear control is proposed in this paper to enhance system steady-state and dynamic performance. This non-linear control is based on dynamic mathematical modeling of five-level CHB-MLI tied SAPF. Stability of proposed control strategy applied to CHB-MLI based SAPF is rigorously checked by using Lyapunov’s direct method. Proportional-Integral controller is used for stabilizing DC-link voltages to its proper reference value. This proposed control exhibits excellent dynamic performance and compensation criteria in comparison to conventional control techniques available in the literature. The effectiveness of the proposed control theory is tested rigorously in MATLAB/Simulink and verified through hardware prototype under steady-state and transient operating conditions. Rigorous analysis from hardware and simulation results confirms that source current waveform is in compliance with IEEE-519 standard defined THD limit.
Appendix
A Parameters for Simulation
Source Voltage: 11 kV, Source Impedance: 0.2 ohm, 0.2 mH, Coupling Inductor: 3.5 mH, 0.25 ohm, Carrier Frequency: 1.5 kHz, DC-link Capacitor: 2200 μF, DC-link voltage: 6800 V
B Parameters for Hardware Prototype
Source Voltage: 50 VRMS, Coupling Inductor: 3.5 mH, 0.25 ohm, Carrier Frequency: 1.5 kHz, DC-link Capacitor: 2200 μF, STGW30NC120HD IGBT made CHB-MLI based SAPF.
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Articles in the same Issue
- Research Article
- Simulation of Modified Flyback Snubber Circuit for Isolated Bidirectional DC-DC Converter
- Design of Cost Effective Solar PV Powered SRM Driven Agriculture Pump Using Modified Buck-Boost Converter
- High Step-Up Boost Converter with Neural Network Based MPPT Controller for a PEMFC Power Source Used in Vehicular Applications
- A Novel Non-Linear Control for Three-Phase Five-Level Cascaded H-Bridge Inverter Based Shunt Active Power Filter
- Operation of Direct Power Control Scheme in Grid-Connected Mode Using Improved Sliding Mode Observer and Controller
- Enhancement of Power Quality in Wind Based Distributed Generation System Using Adaptive Vectorial Filter
- Intelligence Scheme for Fault Location in a Combined Overhead Transmission Line & Underground Cable
- Adaptive Algorithm for Distribution Transformer Protection to Improve Smart Grid Stability
- LQR Based Control Method for Grid Connected and Islanded DG System
- Charging Coordination of Plug-In Electric Vehicle for Congestion Management in Distribution System
- A Unique Concept of Limited Grid Capacity and Voltage-Frequency Control of an RES Based Rural Electrification System
- Multi-Objective based Optimal Generation Scheduling Considering Wind and Solar Energy Systems
- New Selective Harmonic Elimination-Pulse-Width Modulation for Cascaded H-bridge Multilevel Inverters
- Novel PWM Control with Modified PSO-MPPT Algorithm for Reduced Switch MLI Based Standalone PV System
- Reduced Switch Technique for Solar PV System Based Multilevel Inverter for PQ Improvement
- Phase Locked Loop Based Techniques for Compensation of Voltage Based Power Quality Issues in Distribution System
- A Comparative Study of PWM Techniques for Multiphase Induction Motor Drives
