An Improved Voltage and Frequency Control for Islanded Microgrid Using BPF Based Droop Control and Optimal Third Harmonic Injection PWM Scheme

Droop control is commonly used for primary control of island microgrids at the expense of voltage deviations. Furthermore, voltage and frequency restoration can be achieved using droop control along with the communication line. However, system complexity increases and reliability decreases due to th...

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Veröffentlicht in:IEEE transactions on industry applications Jg. 58; H. 2; S. 2483 - 2496
Hauptverfasser: Behera, Manoja Kumar, Saikia, Lalit Chandra
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.03.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Algorithms
Band-pass filter (BPF)
Bandpass filters
Communication
Communications systems
control optimization
Control systems
Controllers
Converters
Data loss
Distributed generation
Electric potential
fractional order control
Frequency control
hardware in the loop (HIL)
Harmonic generations
islanded microgrid
Optimal control
optimal third harmonic injection
Perturbation
Power conversion
Power harmonic filters
Proportional integral derivative
Pulse duration
Pulse width modulation
Response time
Steady state
Step response
Voltage
Voltage control
voltage source converter (VSC)
ISSN:0093-9994, 1939-9367
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Zusammenfassung:Droop control is commonly used for primary control of island microgrids at the expense of voltage deviations. Furthermore, voltage and frequency restoration can be achieved using droop control along with the communication line. However, system complexity increases and reliability decreases due to the communication delay and data loss. Also, overmodulated voltage source converters (VSCs) degrade the ac output in a converter-dominated islanded microgrid. In this article, an improved technique is proposed to control voltage and frequency for an islanded microgrid. The band-pass filter-based droop control (an equivalent secondary control without a communication line) is developed to control distributed inverters to enhance voltage and frequency regulation by reducing response time, overshoot, and steady-state error. Furthermore, a modified proportional integral derivative (MPID) controller is adopted for inner voltage and current loop control to handle the system response fluctuation subject to perturbation and eliminate further voltage quality deterioration. For optimal control action of MPID controller, the controller parameters are tuned using dynamic weighted salp swarm algorithm and validated by both bode plot and step response. Furthermore, an optimal third harmonic injection-sine pulsewidth modulation technique is proposed to reduce the harmonic generation for the entire operation region of the VSC. The proposed control technique is simulated in MATLAB Simulink, and its performance is compared with a state-of-the-art method. Also, the proposed control technique is validated on the OPAL-RT real-time simulator test bench. Investigation revealed that the proposed technique improved the voltage and frequency regulation and effectively minimized overshoots and steady-state errors of the system.
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ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2021.3135253