Modeling of unified power quality conditioner (UPQC) in distribution systems load flow

This paper introduces a new optimization method to determine the optimal allocation of Unified Power Quality Conditioner (UPQC) in the distribution systems. UPQC is a versatile Custom Power Device (CPD) to solve problems related to voltage and current by the series and shunt compensator in the distribution systems. The task of UPQC highlighted in this paper is the required load reactive power is provided by both the series and shunt compensators. The UPQC’s steady state compensation capability has given a solution for providing reactive power compensation in large distribution systems. The optimization method adopted is Moth Flame Optimization (MFO). The best location and series compensator voltage are determined using MFO. The voltage injected by the series compensator and reactive power injected by the shunt compensator is incorporated in the load flow method. The effectiveness of the proposed method is validated with standard distribution systems.

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Optimal unified power quality conditioner placement and sizing in distribution systems considering network reconfiguration

International Journal of Numerical Modelling Electronic Networks Devices and Fields ◽

10.1002/jnm.2467 ◽

2018 ◽

Vol 32 (1) ◽

pp. e2467 ◽

Cited By ~ 3

Author(s):

Khalil Gholami ◽

Shahram Karimi ◽

Ehsan Dehnavi

Keyword(s):

Power Quality ◽

Distribution Systems ◽

Network Reconfiguration ◽

Unified Power Quality Conditioner ◽

Power Quality Conditioner

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A New Control Strategy for Unified Power Quality Conditioner (UPQC) In Distribution Systems

2006 International Conference on Power System Technology ◽

10.1109/icpst.2006.321896 ◽

2006 ◽

Cited By ~ 10

Author(s):

A. Kazemi ◽

A. Mokhtarpour ◽

M. Haque

Keyword(s):

Power Quality ◽

Control Strategy ◽

Distribution Systems ◽

Unified Power Quality Conditioner ◽

Power Quality Conditioner

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Performances Analysis on Power Quality Problems Mitigation by using Unified Power Quality Conditioner (UPQC)

JAREE (Journal on Advanced Research in Electrical Engineering) ◽

10.12962/j25796216.v3.i2.93 ◽

2019 ◽

Vol 3 (2) ◽

Author(s):

May Phone Thit

Keyword(s):

Power Quality ◽

Power Distribution ◽

Distribution System ◽

Distribution Systems ◽

Maximum Load ◽

Dynamic Voltage Restorer ◽

Power Distribution System ◽

System A ◽

Unified Power Quality Conditioner ◽

Power Quality Conditioner

Nowadays, power quality is one of the major problems in electric power distribution system. The poor power quality at distribution level can affect the operation and performance of sensitive and critical loads. In the distribution systems, poor power quality results in various problems such as higher power losses, harmonics, sag and swells in the voltage, and poor power factor., etc. Unified Power Quality Conditioner (UPQC) is the only versatile device which can mitigate several power quality problems related with distribution system. A UPQC that combines the operations of a Distribution Static Compensator (D-STATCOM) and Dynamic Voltage Restorer (DVR) together with the shunt and series active control devices. UPQC can solve the problems related to the voltage/current harmonics, voltage sag/swell and unbalance in distribution system. To evaluate the performance improvement in the system, a model of UPQC is developed in MATLAB/SIMULINK with a typical distribution network. In this research, UPQC is applied for power quality enhancement of Myaungtagar industrial distribution substation, Myanmar. Enhancements in power quality by UPQC are evaluated under maximum load condition.Keywords—Power Quality, UPQC, Series Controller, Shunt controller, Harmonics

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Design and Implementation of Novel Multi-Converter-Based Unified Power Quality Conditioner for Low-Voltage High-Current Distribution System

Energies ◽

10.3390/en11113150 ◽

2018 ◽

Vol 11 (11) ◽

pp. 3150 ◽

Cited By ~ 3

Author(s):

Bin Yang ◽

Kangli Liu ◽

Sen Zhang ◽

Jianfeng Zhao

Keyword(s):

Power Quality ◽

Current Distribution ◽

Distribution Systems ◽

Reactive Power ◽

Low Voltage ◽

Voltage Regulation ◽

Control Algorithms ◽

High Current ◽

Unified Power Quality Conditioner ◽

Power Quality Conditioner

This paper introduces a novel multi-converter-based unified power quality conditioner (MCB-UPQC). Three optimization methods are proposed based on the traditional UPQC: (1) The shunt converter is substituted with multi-modular parallel converters. Hence, the reactive power and harmonic currents can be increased greatly, which are suitable for low-voltage high-current distribution systems. (2) The series converters consist of three H-bridge inverters, and each of the H-bridge inverters is controlled separately. The control strategy is easier to achieve and can improve the control performance of voltage regulation under unbalanced voltage sag or swell. (3) A three-phase four-leg (3P4L) converter is connected to the common DC bus of the proposed UPQC to connect the renewable energy and energy storage system. The detailed mathematical models of shunt and series converters are analyzed, respectively. A multi-proportional resonant (PR) controller is presented in the voltage regulation and reactive power compensation control algorithms. The simulation results verify the feasibility of the control algorithms. Finally, the experimental platform is established, and the experimental results are presented to verify the validity and superiority of the proposed topology and algorithms.

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