Configuration Of Unified Power Quality Conditioner Research Articles

A Novel Three phase Three Wire UPQC Unified Power Quality Conditioner Configuration using Ten Switch Topology for linear RL loads

This paper presents a novel configuration scheme for UPQC using ten switch topology. Generally, two six-switch inverters connected back to back will form the basic power structure of three wire three phase UPQC. But there are some switches which are less utilized all the time. In order to improve the efficiency of the system, or to improve the effective utilization of the IGBTs there is a need to reduce the switch count in the system. The proposed topology uses only ten switches and gives all the results pertaining to twelve switch toplogy. The Simulation results of proposed UPQC Topology are validated through MATLAB/Simulink environment.

Output Voltage and Current Ripples performance Examination in Two Bus system with Boost converters fed UPQC and reduction

This paper presents UPQC with various Boost converter device for reduce the receiving end voltage and sending end current ripples of existed conventional multi bus system. Unified Power Quality Conditioner (UPQC) is a dynamic FACT device transmission system. The UPQC configuration has the capabilities of these two devices, Voltage Regulators, Active Filters. It is noticed that the multi bus system with UPQC minimises the system losses. So UPQC increases the multi bus system performance. This paper also presents the suitable boost converter between PV system and UPQC capacitor to charge the capacitor. Here principle of operation and its implementation of boost converters for multi bus system are presented. Three various types of boost converters those are High Step Up type Boost Converter (HSBC), Double Inductor type Boost Converter (DIBC) and Inter Connected Boost Converter (ICBC) are used for comparative analysis. The comparison is done in boost converter output voltage, input current and those ripples, also transmitting real power and reactive powers. With MATLAB/SIMULINK results, Inter Connected Boost Converter (ICBC) is selected as best converter device in between Photo voltaic system, capacitor of UPQC.

Extensive Application of UPQC-L for a Dual Point of Common Coupling System with Multiple Loads under Unbalanced Source Condition

—This paper presents a synchronous reference frame (SRF)-based power angle control (PAC) approach for a specific unified power quality conditioner (UPQC) arrangement, termed as UPQC-L for dual point of common coupling system under unbalanced source voltage condition. In contrast to a conventional configuration of UPQC, the static compensator (STATCOM) part is on left side of UPQC-L, while dynamic voltage restorer (DVR) is on the right side. The UPQC-L configuration is specifically adapted for protection of sensitive and critical load types from voltage disturbances. Along with its basic compensation capability of current harmonic compensation and voltage compensation, it efficiently handles reactive power demand from sensitive load. This is achieved with the introduction of PAC concept for effective sharing of reactive power between STATCOM and DVR. The extraction of instantaneous power angle faces difficulty with unbalanced voltage and UPQC-L configuration. Thus, the control algorithm for UPQC-L is designed based on SRF and numerical analysis approach with equal reactive power sharing phenomena by STATCOM and DVR of UPQC-L. UPQC-L with the proposed control approach is successfully implemented in MATLAB/SIMULINK (The Mathworks, Inc. USA) and verified experimentally for mitigation of voltage disturbances (such as sag/swell, unbalancing, and harmonics), current harmonics, and high-reactive power demand.

Unified power quality conditioner with super‐capacitor for energy storage

AbstractThis paper proposes a new configuration of UPQC (Unified Power Quality Conditioner) that consists of the DC/DC converter and the super‐capacitors for compensating the voltage interruption. The proposed UPQC can compensate the reactive power, harmonic current, voltage sag and swell, voltage unbalance, and the voltage interruption. The performance of proposed system was analyzed through simulations with PSCAD/EMTDC software, and the realization of proposed system was verified through experimental works with a prototype. The proposed system can improve the power quality at the common connection point of the non‐linear load and the sensitive load. Copyright © 2007 John Wiley & Sons, Ltd.