Application of UPFC for improving micro-grid voltage profile
01 Dec 2010-pp 1-5
TL;DR: In this paper, a new application of the UPFC was introduced to improve the voltage profile of the micro-grid with or without grid connectivity and the proposed method will address the voltage stability concern in the MG using modified UPFC.
Abstract: The power source in micro-grid (MG) is either atmosphere dependent source (e.g. wind generator, solar etc.) or it will be small hydro or diesel turbine. This introduces power quality concerns in MG. It is because of small power number (MW per Hz.) due to limited size of the system and limited resources for system stability. In this paper, a new application of the UPFC is introduced. The slightly modified UPFC can be used to improve the voltage profile of the micro-grid with or without grid connectivity. The proposed method will address the voltage stability concern in the MG using modified UPFC in low and medium voltage system.
Citations
More filters
[...]
TL;DR: In this paper, a review of the work done in the field of micro grid has been reviewed and different load models can be simulated and analyzed using MATLAB and PSCAD software.
Abstract: The demand for high quality electricity and growing electricity consumption has been caused by increas ing electrification of daily life causes and the rising number of sensitive or critic al loads. Due to the rapid increase in global energ y consumption and the diminishing of fossil fuels, the customer demand fo r new generation capacities and efficient energy pr oduction, delivery and utilization keeps rising. The micro grid concept ha s the potential to solve major problems arising fro m large penetration of distributed generation in distribution systems. A proper contro l strategy should be implemented for a successful o peration of a micro grid . Different load models can be simulated and analyzed using MATLAB and PSCAD software. In this paper, th e work done in the field of Micro Grid has been reviewed.
55 citations
24 Jul 2011
TL;DR: In this paper, the authors present the Bibliography of Flexible AC Transmission System (FACTS) applications for grid integration of wind power systems and PV solar power systems during the period 1995 to 2010.
Abstract: This paper presents the Bibliography of Flexible AC Transmission System (FACTS) applications for grid integration of wind power systems and PV solar power systems during the period 1995 to 2010. It provides a listing of various journal and conference papers in this area.
35 citations
TL;DR: IEC 61850 and XMPP based communication for coordinating UPFC and DERs in microgrid for its stable operation is presented and message exchanges overXMPP communication between different components of micro grid for power management is demonstrated.
Abstract: Integration of distributed renewable energy sources in microgrids presents many challenges to grid such as voltage, stability and power management issues. In literature different control strategies to improve the performance of microgrids integrated with renewable energy sources proposed. FACTS based controller such as Unified Power Flow Controller (UPFC) has also been employed in microgrids to improve the power management and transient stability. Coordinated control strategies between UPFC controller and DERs have been developed. However, the underlying communication for realizing these strategies has not been discussed. This paper presents IEC 61850 and XMPP based communication for coordinating UPFC and DERs in microgrid for its stable operation. IEC 61850 information model for UPFC controller is developed. Furthermore, the XMPP protocol is utilized to provide the scalability for communication network in microgrids with high penetration of DERs. Additionally, XMPP also provides improved security along with the scalability. IEC 61850 message exchanges over XMPP communication between different components of microgrid for power management is demonstrated.
15 citations
Cites methods from "Application of UPFC for improving m..."
...POWER MANAGEMENT USING UPFC IN MICROGRIDS The UPFC has been used in microgrids for voltage profile improvement, reactive and active power compensation [7], [14], [15]....
[...]
TL;DR: This paper investigates the global and local power flow operation rules of the UPFC embedded transmission system theoretically and verifies that the UpFC is adaptive to various operation conditions for power flow regulation.
Abstract: The unified power flow controller (UPFC) is recognized as one of the most promising flexible ac transmission system (FACTS) devices for modern power systems, due to its versatile functionalities. Based on typical operation conditions, this paper investigates the global and local power flow operation rules of the UPFC embedded transmission system theoretically. First, the detailed global power flow model (GPFM) and the local power flow model (LPFM) are established concerning several selected critical points (SCPs) in the system. The theoretical power flow operation rules for the ranges, the movements and the trajectories of GPFM and LPFM are analyzed, respectively. Then, the case study is performed based on the proposed simplified model, and the results are analyzed from GPFM and LPFM perspectives respectively. The operation rules and the power flow ranges is studied. Further case studies based on the proposed original mathematical model are also carried out, and the results are listed from different viewpoints of two-dimensional planes and three-dimensional spaces. All types of results are also analyzed from GPFM and LPFM perspectives, which verify that the UPFC is adaptive to various operation conditions for power flow regulation.
11 citations
Cites background from "Application of UPFC for improving m..."
...In [20]–[22], the power flow models of UPFC had taken certain additional parameters into account, such as the system parametric uncertainties, the wind power uncertainties and the prerequisites of micro-grids....
[...]
01 Jan 2011
TL;DR: The fourth part of the Bibliography of FACTS technology for 2009 and 2010 is presented in this article, where a listing of various journal and conference papers in this area is provided.
Abstract: This paper presents the fourth part of the Bibliography of FACTS technology for 2009 and 2010. It provides a listing of various journal and conference papers in this area.
7 citations
References
More filters
Book•
01 Jan 1994
TL;DR: In this article, the authors present a model for the power system stability problem in modern power systems based on Synchronous Machine Theory and Modelling, and a model representation of the synchronous machine representation in stability studies.
Abstract: Part I: Characteristics of Modern Power Systems. Introduction to the Power System Stability Problem. Part II: Synchronous Machine Theory and Modelling. Synchronous Machine Parameters. Synchronous Machine Representation in Stability Studies. AC Transmission. Power System Loads. Excitation in Stability Studies. Prime Mover and Energy Supply Systems. High-Voltage Direct-Current Transmission. Control of Active Power and Reactive Power. Part III: Small Signal Stability. Transient Stability. Voltage Stability. Subsynchronous Machine Representation in Stability Studies. AC Transmission. Power System Loads. Excitation in Stability Studies. Prime Mover and Energy Supply Systems, High-Voltage Direct-Current Transmission. Control of Active Power and Reactive Power. Part III: Small Signal Stability. Transient Stability. Voltage Stability. Subsynchronous Oscillations. Mid-Term and Long-Term Stability. Methods of Improving System Stability.
13,467 citations
TL;DR: In this paper, a systematic approach to small-signal modeling of a micro-grid system that includes conventional (rotating machine) and electronically interfaced distributed resource (DR) units is presented.
Abstract: A systematic approach to small-signal modelling of a micro-grid system that includes conventional (rotating machine) and electronically interfaced distributed resource (DR) units is presented here. The proposed approach incorporates fundamental frequency deviations in the overall system model and provides a methodology for the analysis of autonomous micro-grid, which inherently is more prone to frequency changes than the conventional utility grid. The model represents (i) electro-mechanical dynamics of the synchronous machine including the exciter and the governor systems, (ii) dynamics of the voltage-sourced converter and its real/reactive power controllers and (iii) the network dynamics. The model is intended for the controller design/optimisation, evaluation of angle/voltage stability, investigation of torsional dynamics, controller interactions of electronically interfaced DR units and low-frequency power quality issues. Typical results from application of the proposed modelling approach to a study system are presented. The results are qualitatively verified on the basis of the comparison with those obtained from time-domain simulation in the PSCAD/EMTDC environment
307 citations
TL;DR: In this paper, a new power frequency model for unified power flow controller (UPFC) is suggested with its DC link capacitor dynamics included, and four principal control strategies for UPFC series element main control and their impacts on system stability are discussed.
Abstract: In this paper, a new power frequency model for unified power flow controller (UPFC) is suggested with its DC link capacitor dynamics included. Four principal control strategies for UPFC series element main control and their impacts on system stability are discussed. The main control of UPFC series element can be realized as a combination of the four control functions. The supplementary control of UPFC is added for damping power oscillation. The integrated UPFC model has then been incorporated into the conventional transient and small signal stability programs with a novel UPFC-network interface. Computer tests on a 4-generator interconnected power system show that the suggested UPFC power frequency model and the UPFC-network interface method work very well. The results also show that the suggested UPFC control strategy can realize power flow control fairly well and improve system dynamic performance significantly.
221 citations
01 Jan 2008
TL;DR: In this paper, the authors present real and reactive power flow control through a transmission line by placing a Unified Power Flow Controller (UPFC) at the sending end using computer simulation.
Abstract: The Unified Power Flow Controller (UPFC) is the most versatile and complex power electronic equipment that has emerged for the control and optimization of power flow in electrical power transmission system. This paper presents real and reactive power flow control through a transmission line by placing UPFC at the sending end using computer simulation. When no UPFC is installed, real and reactive power through the transmission line can not be controlled. This paper presents control and performance of UPFC intended for installation on that transmission line to control power flow. A control system which enables the UPFC to follow the changes in reference values like AC voltage, DC voltage and angle order of the series voltage source converter is simulated. In this control system, a generalized pulse width modulation technique is used to generate firing pulses for both the converters. Installing the UPFC makes it possible to control an amount of active power flowing through the line. Simulations were carried out using MATLAB and PSCAD software to validate the performance of the UPFC.
48 citations
01 Jan 2009
TL;DR: In this paper, a single phase unified power flow controller (UPFC) was designed using Matlab and Simulink software, and a microcontroller program was developed to provide the required phase shift.
Abstract: Unified Power Flow Controller (UPFC) is used to control the power flow in the transmission systems by controlling the impedance, voltage magnitude and phase angle. This controller offers advantages in terms of static and dynamic operation of the power system. It also brings in new challenges in power electronics and power system design. The basic structure of the UPFC consists of two voltage source inverter (VSI); where one converter is connected in parallel to the transmission line while the other is in series with the transmission line. The main scope of this paper involves the designing of a single phase UPFC using Matlab and Simulink software, and constructing a lab scale model of the UPFC. A microcontroller program has been developed to provide the required phase shift. The experimental result which has been obtained from a lab scale system showed a good agreement with the simulation result.
26 citations