EPE Association: EPE 2020 - DS2m: Power Quality Issues and Power Factor Correction Techniques

EPE 2020 - DS2m: Power Quality Issues and Power Factor Correction Techniques
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 06: Grids, Smart Grids, AC & DC > EPE 2020 - DS2m: Power Quality Issues and Power Factor Correction Techniques

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   A Voltage Control Method for Power Distribution Lines Utilizing Dispersed Customer Resources
By Hiroki ISHIHARA [View]
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Abstract: This paper proposes a voltage control method in cooperation with a tap changer, such as a step voltage regulator, for power distribution lines using power conditioning systems. Generally, a town which plays a role of a virtual power plant has an energy management system and consists of a lot of power conditioning systems in houses. In this paper, it is clarifies that the method is able to control the voltage at the connecting point of the distribution system properly cooperating with the step voltage regulator under several voltage fluctuation conditions. Furthermore, it is shown that a communication between the energy management system and power conditioning systems enables the system to resolve unevenness output of reactive power of the power conditioners.

   Discrete-time Pole Placement for Stability Enhancement of LCL-Filtered Inverters in the Synchronous-Reference Frame
By Pei CAI [View]
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Abstract: For LCL-filtered grid-tied inverters, direct pole-placement techniques can combine the fundamentalfrequency current regulation and resonance damping simultaneously. As known, for state-space-based direct pole-placement, to purse sensorless operations, state observers have to be employed, which means heavy computation burden and might limit switching and sampling frequency. While for transfer-function-based one, the number of necessary variables decreases and meanwhile it releases the computation load free from observers. Therefore the latter is more suitable in applications. Based on this, this paper extends and summarizes it for better accessibility, and shows that, compared to previous applications in the stationary frame, transfer-function-based discrete-time domain (z-domain) direct pole placement in the synchronous frame presents better robustness against varying grid impedance, improved phase margin and gain margin, and simplified feed-forward compensation, presuming the cross coupling is ignored. Simulations verified the analysis and design

EPE 2020 - DS2m: Power Quality Issues and Power Factor Correction Techniques
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 06: Grids, Smart Grids, AC & DC > EPE 2020 - DS2m: Power Quality Issues and Power Factor Correction Techniques
	[return to parent folder]

	A Voltage Control Method for Power Distribution Lines Utilizing Dispersed Customer Resources By Hiroki ISHIHARA	[View] [Download]
Abstract: This paper proposes a voltage control method in cooperation with a tap changer, such as a step voltage regulator, for power distribution lines using power conditioning systems. Generally, a town which plays a role of a virtual power plant has an energy management system and consists of a lot of power conditioning systems in houses. In this paper, it is clarifies that the method is able to control the voltage at the connecting point of the distribution system properly cooperating with the step voltage regulator under several voltage fluctuation conditions. Furthermore, it is shown that a communication between the energy management system and power conditioning systems enables the system to resolve unevenness output of reactive power of the power conditioners.

	Discrete-time Pole Placement for Stability Enhancement of LCL-Filtered Inverters in the Synchronous-Reference Frame By Pei CAI	[View] [Download]
Abstract: For LCL-filtered grid-tied inverters, direct pole-placement techniques can combine the fundamentalfrequency current regulation and resonance damping simultaneously. As known, for state-space-based direct pole-placement, to purse sensorless operations, state observers have to be employed, which means heavy computation burden and might limit switching and sampling frequency. While for transfer-function-based one, the number of necessary variables decreases and meanwhile it releases the computation load free from observers. Therefore the latter is more suitable in applications. Based on this, this paper extends and summarizes it for better accessibility, and shows that, compared to previous applications in the stationary frame, transfer-function-based discrete-time domain (z-domain) direct pole placement in the synchronous frame presents better robustness against varying grid impedance, improved phase margin and gain margin, and simplified feed-forward compensation, presuming the cross coupling is ignored. Simulations verified the analysis and design