scholarly journals Simplified control method for unified power quality conditioner (UPQC)

2009 ◽  
Vol 1 (07) ◽  
pp. 474-478 ◽  
Author(s):  
Metin Kesler ◽  
Engin Ozdemir
Keyword(s):  
Power Quality ◽  
Control Method ◽  
Unified Power Quality Conditioner ◽  
Power Quality Conditioner

scholarly journals Integrated Photovoltaic Inverters Based on Unified Power Quality Conditioner with Voltage Compensation for Submarine Distribution System

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2927 ◽  
Author(s):  
Desmon Petrus Simatupang ◽  
Jaeho Choi
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Distribution System ◽  
Control Method ◽  
Normal Load ◽  
Quality Level ◽  
Unified Power Quality Conditioner ◽  
Power Quality Improvement ◽  
Power Quality Conditioner ◽  
Submarine Cables

This paper proposes a multi-functional Photovoltaic (PV) inverter based on the Unified Power Quality Conditioner (UPQC) configuration. Power quality improvement is a difficult issue to solve for isolated areas or islands connected to the mainland through long submarine cables. In the proposed system, the line voltage is compensated for by the series inverter while the shunt inverter delivers the PV generating power to the grid. Depending on the technical conditions of power quality and system environment, it has five different operating modes. Especially during poor power quality conditions, the sensitive load is separated from the normal load to provide a different power quality level by using the microgrid conception. In this paper, the control method and the power flow for each mode are described, and the operational performance is verified through a PSiM simulation so that it can be applied to the power quality improvement of weak grid power systems such as in isolated areas or on islands connected to the mainland by long submarine cables.

Parallel Processing Unified Power Quality Conditioner Control Based on State Variable Feedback

2013 ◽  
Vol 448-453 ◽  
pp. 2551-2555
Author(s):  
Yong Hou ◽  
Shang Wen Cui ◽  
Guo Dong You ◽  
Ying Hong Duan
Keyword(s):  
Parallel Processing ◽  
Power Quality ◽  
Power Supply ◽  
Control Method ◽  
Pi Control ◽  
System Control ◽  
State Variable ◽  
Unified Power Quality Conditioner ◽  
Supply Current ◽  
Power Quality Conditioner

A new kind of parallel processing unified power quality conditioner with only one inverter is introduced. The system PI control method has a problem that the DC transient component of supply current does decay because of the linking inductance between power supply and load. A system control method based on state variable feedback is proposed, which indirectly controls the load voltage by controlling the supply current. The proposed control strategy is verified by simulation using Matlab.

An Application of Unified Power Quality Conditioner for Micro-Grid

2013 ◽  
Vol 380-384 ◽  
pp. 3149-3154
Author(s):  
Han Guo Yu ◽  
Jian Ru Wan ◽  
Ran Liu
Keyword(s):  
Power Quality ◽  
Tracking Control ◽  
Control Method ◽  
Control Program ◽  
Nonlinear Load ◽  
Unified Power Quality Conditioner ◽  
New Energy ◽  
Micro Grid ◽  
Power Quality Conditioner

According to the power quality problems of micro-grid, this paper presents a control program of the Unified Power Quality Conditioner (UPQC) to improve the micro-grid power quality.The shunt side of UPQC is used to eliminate the harmonic current brought by nonlinear load into the micro-grid. And the conditioner series part is used to suppress distributed new energy generation intermittence. In the paper synchronous coordinate transformation is used to detect compensated components and tracking control method is adopted to control the converter. The simulation results demonstrate the effectiveness of the UPQC on improving the power quality of the micro-grid.

scholarly journals The Unified Power Quality Conditioner Control Method Based on the Equivalent Conductance Signals of the Compensated Load

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6298
Author(s):  
Andrzej Szromba
Keyword(s):  
Power Quality ◽  
Energy Flow ◽  
Static Load ◽  
Control Method ◽  
Time Variable ◽  
Distribution Center ◽  
Equivalent Conductance ◽  
Unified Power Quality Conditioner ◽  
Voltage Quality ◽  
Power Quality Conditioner

This paper proposes a new control method for a Unified Power Quality Conditioner (UPQC). This method is based on the load equivalent conductance approach, originally proposed by Fryze. It can be useful not only for compensation for nonactive current and for improving voltage quality, but it also allows one to perform some unconventional functions. This control method can be performed by extending the orthodox notion of ‘static’ load equivalent conductance into a time-variable signal. It may be used to characterize energy changes in the whole UPQC-and-load circuitry. The UPQC can regulate energy flow between all sources and loads being under compensation. They may be located as well for UPQC’s AC-side as DC-side. System works properly even if they switch their activity to work either as loads or generators. The UPQC can operate also as a buffer, which can store/share the in-load generated energy amongst other loads, or it can transmit this energy to the source. Therefore, in addition to performing the UPQC’s conventional compensation tasks, it can also serve as a local energy distribution center.

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