Design and experimental verification of a dead beat power control strategy for low cost three phase PWM converters

In microgrids, paralleled converters can increase the system capacity and conversion efficiency but also generate zero-sequence circulating current, which will distort the AC-side current and increase power losses. Studies have shown that, for two paralleled three-phase voltage-source pulse width modulation (PWM) converters with common DC bus controlled by space vector PWM, the zero-sequence circulating current is mainly related to the difference of the zero-sequence duty ratio between the converters. Therefore, based on the traditional control ideal of zero-vector action time adjustment, this paper proposes a zero-sequence circulating current suppression strategy using proportional–integral quasi-resonant control and feedforward compensation control. Firstly, the dual-loop decoupled control was utilized in a single converter. Then, in order to reduce the amplitude and main harmonic components of the circulating current, a zero-vector duty ratio adjusting factor was initially generated by a proportional–integral quasi-resonant controller. Finally, to eliminate the difference of zero-sequence duty ratio between the converters, the adjusting factor was corrected by a feedforward compensation link. The simulation mode of Matlab/Simulink was constructed for the paralleled converters based on the proposed control strategy. The results verify that this strategy can effectively suppress the zero-sequence circulating current and improve power quality.

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Individual-phase reactive power control strategy with constant DC-capacitor voltage control for active load balancer on three-phase four-wire distribution feeders

2015 IEEE Energy Conversion Congress and Exposition (ECCE) ◽

10.1109/ecce.2015.7310597 ◽

2015 ◽

Author(s):

Yoshihiro Hisada ◽

Su Hlaing Wint ◽

Hiroaki Yamada ◽

Toshihiko Tanaka ◽

Masayuki Okamoto ◽

...

Keyword(s):

Power Control ◽

Control Strategy ◽

Reactive Power ◽

Voltage Control ◽

Reactive Power Control ◽

Individual Phase ◽

Active Load ◽

Three Phase ◽

Capacitor Voltage ◽

Load Balancer

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Novel, simple reactive power control strategy with DC capacitor voltage control for active load balancer in three-phase four-wire distribution systems

2014 IEEE Energy Conversion Congress and Exposition (ECCE) ◽

10.1109/ecce.2014.6953933 ◽

2014 ◽

Author(s):

Tint Soe Win ◽

Yoshihiro Hisada ◽

Toshihiko Tanaka ◽

Eiji Hiraki ◽

Masayuki Okamoto ◽

...

Keyword(s):

Power Control ◽

Control Strategy ◽

Distribution Systems ◽

Reactive Power ◽

Voltage Control ◽

Reactive Power Control ◽

Active Load ◽

Three Phase ◽

Capacitor Voltage ◽

Load Balancer

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Operation and Startup of Three-Phase Grid-Connected PWM Inverter for an Experimental Test Bench With DSPACE Real-Time Implementation of PQ Control

10.4018/978-1-7998-7447-8.ch008 ◽

2022 ◽

pp. 207-232

Author(s):

Kamal Elyaalaoui ◽

Moussa Labbadi ◽

Khalid Chigane ◽

Mohammed Ouassaid ◽

Mohamed Cherkaoui

Keyword(s):

Power Control ◽

Real Time ◽

Experimental Test ◽

Control Strategy ◽

Test Bench ◽

Experimental Results ◽

Electrical Network ◽

Three Phase ◽

Grid Connected Inverter ◽

Experimental Test Bench

The main objective of this chapter is the experimental validation of active and reactive power control at the connection point for a three-phase grid connected inverter. It gives an overview on the adopted vector control strategy, regulation of the angle of orientation of the blades (pitch control), synchronization grid side converter to the power network using phase closed loop (PLL). Once the experimental test bench is described, the authors devote a first part to the design of the block circuit diagram of the experimental platform and the control strategy implemented in the DSPace DS1104, and they suggest some steps to associate the inverter to the electrical network. Subsequently, they discuss the experimental results validating the proposed power control. The purpose of this experimental results is the DSPACE real-time implementation of PQ control using three-phase inverter and development of a startup algorithm of the experimental test bench.

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