Authors: None

Abstract:

Keywords:

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.90001

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: ---

Authors: Kim, Chan-Ki; Jang, Gil-Soo; Moon, Hyoung-Bae; Choo, Jin-Boo

Abstract: This paper deals with the impact of an excitation system on the torsion dynamics of turbine-generators, which are located on the inverter side of HVDC systems. Turbine-generator stress depends on the type and the parameters of an excitation system, and the fault type and location in an AC network because of commutation failures at the inverter station. Also, this paper analyzes how parameters of an excitation system are related to the torsional stress of a turbine-generator. Using the CIGRE benchmark model, the torsional stress on a generator on the inverter side is simulated. The PSCAD/EMTDC program is used for simulation studies.

Keywords: HVDC system,excitation system,torsional torque,PSCAD/EMTDC

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00003

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: ---

Authors: Raj, Hemant

Abstract: This paper describes an algorithm that is suitable for a Distributed Control System (DCS) for an Automatic Generation Control (AGC) mechanism along with the assessment of Generation Allocation under complex real time load frequency control of Power Plants. Due to deregulation of interconnected systems, the usage of real time prices to assist in the control of frequency and tie line deviations in power systems is essential. In addition, the Automatic Generation Control mechanism needs to act very fast and should be highly adaptable to market demands and real time varying prices simultaneously. Therefore, it is necessary to implement algorithms for Distribution Automation and an attempt has been made to use quasi-synchronous methodology.

Keywords: Automatic Generation control,load frequency Control,Distributed Control Systems,ISO,area control error

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00004

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: ---

Authors: Trybus, Leszek

Abstract: Current features of distributed control systems (DCS) for power plants are reviewed based on nine DCSs from ABB, Siemens, Emerson, Alstom, Honeywell, Metso, Yokogawa and Invensys. The review involves general architecture, control stations, open communications, engineering, operator, information subsystems. Comparison tables are provided. Unique properties of some DCSs indicate future trends.

Keywords: distributed control systems,control stations,communications,power systems

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00005

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: ---

Authors: Yang, B. M.; Kim, C. K.; Jung, G. J.; Choi, Y. D.; Park, J. K.; Choo, J.-B.

Abstract: In this paper Hybrid Real Time HVDC Simulator for both operator's training and researching in Cheju-Haenam HVDC system is proposed and its performance is verified by RTDS(Real Time Digital Simulator), EMTDC(Electro-Magnetic Transient system for DC), PSS/E(Power System Simulator for Engineering), and experienced scenarios. The main objective of this paper is to represent the strategy in development of the KEPCO hybrid HVDC simulator for Cheju-Haenam HVDC system. This simulator consists of two DC stations, DC cables, external digital/analogue controllers, control desk for education, and AC networks. In cases of both startup/shutdown and normal state operations, the suitability of it for operator's education is tested. Also the dynamic performances of it are verified.

Keywords: HVDC,Hybrid Simulator,Real Time,RTDS,external controller,EMTDC,PSS/E

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00006

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: ---

Authors: Pandey, R. K.

Abstract: This paper presents a novel concept for stabilization of AC/DC network with Unified Power Flow Controller (UPFC). The system considered has the structure of two areas connected by HVDC link. The investigation for perturbation in ac bus voltages has been carried out and the effect on the stability deterioration has been analyzed. The new concept of control has been proposed by embedding UPFC and then generating the control decisions adequately which stabilizes the earlier one. The concept of including the Unified Power Flow Controller (UPFC) in AC/DC network especially where a DC link is embedded to connect the two AC Systems is proposed. The proposed control design has been done utilizing a Novel Discrete-Time model of AC/DC system. The complete system stability has been studied in which the individual controller such as HVDC-SVC and HVDC-SVC-UPFC performance under varying perturbation of ac system voltage has been widely analyzed. The results show that in situations the HVDC-SVC alone is unable to reject the perturbation, the UPFC along with the HVDC-SVC damps the oscillations, thus matching the real and reactive power demands adequately. This novel combination can effectively be utilized in situations when the ac system bus voltage undergoes the fluctuations due to changing P and Q requirements.

Keywords: HVDC,SVC,UPFC,discrete-time,continuous time,multirate sampling

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00007

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 1-6

Authors: Welfonder, E.; Kurth, M.

Abstract: For maintaining the reliability of interconnected power systems also in cases of extreme power transits the protective system devices should not become active when ever possible. For this reason, it is necessary to provide for limitation control procedures, and this not only on the side of power plant and system, where it has been common practice for many years to keep at least the main manipulated and controlled variables within their foreseen operation areas, but also within the grid to contain the transmission flows of heavily overloaded system components within their maximum allowable transmission capacity. In this respect, manual short-term bottleneck management on the system operation side turns out to be not sufficient enough, in the case of unexpected events caused by increased power transits.

Keywords: power plants,power systems,power transits,bottleneck management,limitation control,protection,blackouts

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00008

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 7-16

Authors: Abu-Ayyad, Ma'moun; Dubay, Rickey

Abstract: A new predictive controller is developed that represents a significant change from conventional model predictive control (MPC). The method termed extended predictive control (EPC) uses one tuning parameter, the condition number (CN) of the system matrix to provide a easy-to-follow tuning procedure. The control performance of EPC is compared with the original move suppressed and recently derived shifted predictive controllers, with improved results.

Keywords: modeling,simulation,control methods,and real-time operation

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00009

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 17-22

Authors: Befekadu, Getachew K.; Erlich, I.

Abstract: This paper presents a decentralized H∞ controller design approach for power systems. Initially a centralized H∞ robust controller, which guarantees the robust stability of the overall system against unstructured and norm bounded uncertainties, is designed. The problem of designing decentralized controller is then reformulated as an embedded parameter continuation problem that homotopically deforms from the centralized to the decentralized controller as the continuation parameter varies monotonically. Moreover, the paper proposes an algorithm to solve such problem using two-stage iterative matrix inequality optimization approach to determine the decentralized controller. The approach is flexible enough to allow designing a reduced-order controller for each subsystem with the same robustness condition of the centralized controller. The approach is demonstrated by designing PSSs for a test system.

Keywords: decentralized control,interconnected systems,nonlinear systems,optimization methods and robustness

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00010

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 23-28

Authors: Boiko, Igor

Abstract: A self-tuning algorithm comprising the steps of identification and tuning is proposed. The methodology of process parameters identification is based on the measurement of the locus of a perturbed relay system (LPRS) points from a single or multiple asymmetric relay feedback tests. An algorithm of identification of the first order plus dead time process model is developed in details. Also, a tuning algorithm using the criterion of minimal settling time subject to the overshoot constraints is developed and presented in the form of simple formulas for the first-order plus dead time process model. Examples of simulations and application are given.

Keywords: PID control,identification,autotuning,relay feedback system,oscillations

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00011

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 29-34

Authors: Abu-Ayyad, Ma'moun; Dubay, Rickey

Abstract: The proposed algorithm of extended predictive control (EPC) represents an exact method for removing the ill-conditioning in the system matrix by developing a unique weighting structure for any control horizon. The main feature of EPC algorithm is that it uses the condition number (CN) of the system matrix to evaluate a single tuning parameter that provides a specified closed loop response. Tuning of EPC is effective and simple since there is a direct relationship between closed loop performance and its tuning parameter.

Keywords: modeling,simulation,control methods,and real-time operation

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00012

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 35-40

Authors: Folly, K. A.

Abstract: This paper uses a novel simplified version of GAs called Population-Based Incremental Learning (PBIL) to optimally tune the parameters of the power system stabilizers (PSSs) for a multi-machine system. The technique combines aspects of GAs and competitive learning-based artificial neural network. The issue of optimally tuning the parameters of the PSS is converted into an optimization problem that is solved via the PBIL algorithm. Simulation results are presented to show the effectiveness of the proposed approach.

Keywords: genetic algorithms (GAs),population,based incremental learning (PBIL),power system stabilizer (PSS),electromechanical oscillations

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00013

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 41-46

Authors: Lee, Joo-Won; Yang, Kwang-Min; Jeong, Yun-Won; Park, Jong-Bae; Shin, Joong-Rin

Abstract: This paper discusses the development of the educational simulator for the electricity spot market in Korea. In the developed simulator, lecturers can set information related with market and market entities and students can bid and examine the market with lecturers. The interaction between lecturers and users can be much enhanced via the web-based programs which result in the student's learning effectiveness on an electricity spot market. However the difficulties for developing web-based application programs are that there can be the numerous unspecified users to access the application programs. To overcome the aforementioned multi-users problem, we have provided the effective system architecture, the modelling of application programs, and database efficiently and effectively to manage the complex data sets. The developed application program is composed of the physical three tiers where the middle tier is logically divided into two kinds of application programs. The divided application programs are interconnected by using the Web-service based on XML (Extended Markup Technology) and HTTP (Hyper Text Transfer Protocol) which make it possible the distributed computing technology.

Keywords: electricity spot market,two way bidding pool (TWBP),marginal clearing price (MCP),educational simulator,XML-based program

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00014

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 47-52

Authors: Matsumoto, Keinosuke; Maruo, Tomoaki; Mori, Naoki

Abstract: Various power trading system models have been proposed, but many of them will not aim at load reduction by making customers cooperate with power suppliers in a power trading market. Some researches tried to solve the problem by introducing reward in the power market. This approach was developed on an evaluation function, but it must estimate customers' evaluation functions beforehand. Then, this paper proposes a new approach to cope with various kinds of customers by modeling a power market on a satisfaction space. In addition, we have built the proposed system as a Web application on the Internet.

Keywords: power systems,economics,energy management,intelligent systems,modelling,communications systems,utility functions

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00015

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 53-58

Authors: Weber, H.; Hamacher, T.; Haase, T.

Abstract: The energy supply in Germany was steered by the current demand of the consumers till now. It will change in an adjustment process to an energy supply led by stochastically arising energy offer by wind power stations. The development of the wind energy is pushed at suitable onshore and offshore sites. Up to the year 2030 onshore wind parks are expected with an installed power of approx. 22 GW and offshore wind parks with 26 GW installed power. The planned offshore wind parks with partly more Giga watts of power must be connected to the existing high-voltage transmission system. Another problem is that the wind energy is mostly produced in northern Germany, but is mainly needed in the middle and Southern part of Germany such as the Rhine-Main and Ruhr district. In order to compensate for the fluctuating feeding from the wind power stations backup power plants are needed. They must be able to provide reserve power. A simplified model of the German energy generation and transmission system was used for this investigation. Based on this model a conceivable scenario of the energy supply in Germany in the year 2030 will be discussed in this paper.

Keywords: renewable energy,bottlenecks,load management,congestion management,substitution of conventional power

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00016

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 59-64

Authors: Mozafari, B.; Ranjbar, A. M.; Mozafari, A.; Amraee, T.

Abstract: This paper proposes a methodology for optimal dispatch of bilateral electricity contracts, which may endanger the system voltage stability in light of short-term operational planning of a deregulated power system. In this framework the value that each owner of a transaction is willing to pay will reflect how much the electricity contract is important to be implemented physically. The proposed model dispatches optimally the bilateral transactions regarding the prices offered by owners of bilateral contracts for reactive power and transmission capacity utilization in one hand and, the total operational costs of reactive power resources in the other hand. The model also includes the limits imposed by the physical constraints on the power system such as nodal power flow equations, limits on capacity of resources, voltage stability constraint and etc. The proposed framework is formulated as an AC-OPF problem and is implemented over the IEEE 14 bus test system using CONOPT solver (GAMS) to illustrate the feasibility of the approach.

Keywords: bilateral contracts,deregulation,reactive power,voltage stability,OPF

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00017

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 65-70

Authors: Karrari, M.; Rosehart, W.; Malik, O. P.; Givehchi, A. H.

Abstract: Synchronous generators are multivariable systems and are well defined in a state space structure. Subspace state space (4SID) identification method is most suitable for identification of such systems. In this paper, the identification of a synchronous generator using this identification method is presented. To cover the nonlinearities, first the overall range of operation in the active (P) and reactive (Q) power plane is divided into subsections and a linear state space model is identified for the centre of each subsection. A neural network is then used to estimate the parameters for the operating conditions other than the centres of the subsections.

Keywords: synchronous machines,parameter estimation,identification,dynamic modelling,neural networks

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00018

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 71-76

Authors: Hashiguchi, Takuhei; Ota, Yutaka; Ukai, Hiroyuki; Mitani, Yasunori; Saeki, Osamu; Hojo, Masahide

Abstract: In recent years, there has been an increasing interest in monitoring and analyzing dynamic performances of power systems, such as observation of power system oscillations and evaluation of machine parameters. Authors have placed phasor measurement units (PMU) connected to 100V outlets in some universities in Japan and been researching into oscillation characteristics in power systems. The purpose of this paper is to propose methods for processing actual data so as to detect power system oscillations under a steady state operating conditions. Moreover, eigenvalues of power system oscillations occurred in Japan western 60Hz system are estimated.

Keywords: global positioning systems,digital filters,eigenvalues,monitoring elements,time synchronization

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00019

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 77-82

Authors: Saied, S. A.; Bathaee, S. M.; Karrari, M.; Rosehart, W.; Malik, O. P.

Abstract: A novel technique to estimate the electric parameters of a synchronous generator from on-line measurement is presented in this paper. The proposed algorithm has two steps. In the first step, replacing the damper currents by higher derivatives of field and armature d-q currents, the electric parameters of the armature are estimated. In the second step, a current estimator is designed to estimate the damper winding currents, from which the parameters of field and damper windings are estimated. Simulation results show very good estimate of the electric parameters of a seventh order synchronous generator.

Keywords: synchronous machines,electrical constants,dynamic modelling,parameter estimation,identification

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00020

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 83-88

Authors: Odgaard, Peter Fogh; Mataji, Babak

Abstract: For coal-fired power plants information of the moisture content in the coal is important to determine and control the dynamical behavior of the power plants. E.g. a high moisture content in the coal can result in a decreased maximum load gradient of the plant. In this paper a method for estimating the moisture content of the coal is proposed based on a simple dynamic energy model of a coal mill, which pulverizes and dries the coal before it is burned in the boiler. An optimal unknown input observer is designed to estimate the moisture content based on an energy balance model. The designed moisture estimator is verified on a couple of sets of measurement data, from which it is concluded that the designed estimator estimates the real coal moisture content.

Keywords: moisture estimation,coal-fired power plants,optimal unknown input observer

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00021

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 89-94

Authors: Caux, S.; Hankache, W.; Hissel, D.; Fadel, M.

Abstract: The use of fuel cell and supercaps as energy elements in transport application is now a reality. Having two power sources on board allows a certain energy management strategy. In order to reduce computation time consumption, a simplified physical fuel cell model is proposed. An accurate model is studied in simulation to derive a simpler model. The simplified model is used with parameters identification made on an actual fuel cell. Results obtained on current and voltage, with an actual power demand, are sufficient to use the proposed model in iterative optimization algorithms.

Keywords: circuit model,identification,power management,optimization

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00022

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 95-100

Authors: Crainic, Emmanuel D.; Petroianu, Alexander I.

Abstract: The paper introduces modern concepts and tools from affine geometry into power system analysis. It is shown that such an approach allows: i) a new non linear formulation of such classical problems as load flow and state estimation, ii) a more efficient way of solving such problems through non iterative methods. The new approach is illustrated for a small but representative example of a load flow for a two-bus network.

Keywords: affine geometry,affine transformations,linear methods,algebraic and geometric invariants,power systems load flow

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00023

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 101-106

Authors: Fusco, Giuseppe; Russo, Mario

Abstract: This paper deals with the problem to regulate the nodal voltage amplitude in electrical power systems. A discrete-time linear model that embeds an unknown bias representing the no-load voltage is adopted to describe the power system dynamics. Due to the unpredictable and unknown variations of the power system normal operating points the model parameters are unknown and time-varying. To ensure that the controller exhibits the required performance even in presence of a such variations, the controller parameters are varied according to adaptive laws. These laws are developed on the basis of a gradient approach to minimize the squared augmented error. The properties of the designed adaptive laws are studied employing Lyapunov analysis. The results of numerical simulation are reported to validate the proposed design.

Keywords: power system voltages,discrete-time systems,model-reference adaptive control,gradient method

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00024

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 107-112

Authors: Hur, Don; Lee, Heung-Jae

Abstract: There has been an increased interest in quantifying the transmission transfer capability of power systems. Transfer capability indicates how much a particular bulk power transfer can be changed without compromising system security under a specific set of operating constraints and voltage stability capturing various contingencies. Hence this paper will touch on the security-constrained optimal power flow and P-V methodology for providing insight into the secure limit of interface flow between areas and steady-state voltage stability. An attempt to cover as much of the field as possible has been made by quoting tests on 2003 Korean electric power system.

Keywords: continuation power flow,optimal power flow,P-V analysis,security,steady-state voltage stability,transmission transfer capability

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00025

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 113-118

Authors: Sode-Yome, Arthit; Mithulananthan, Nadarajah; Lee, Kwang Y.

Abstract: This paper presents voltage stability study of the Thailand power system by considering the existing Static Var Compensators, generation and load directions. An approach to determine appropriate voltage settings of existing Static Var Compensators is proposed in order to maximize static voltage stability margin of the system. Two most recent methods, namely Maximum Loading Margin and realistic load direction methods, are applied to the Thailand power system in order enhance loading margin of the system in a practical way. With the applications of the proposed and existing techniques, the highest and practical voltage stability margin of Thailand power system is obtained. This provides a guide for electric power utilities to enhance voltage stability margin of power systems in a practical way.

Keywords: Thailand power system,maximum loading margin method,realistic load direction,static var compensator,voltage setting

Digital Object Identifier (DOI): 10.3182/20060625-4-CA-2906.00026

Conference: 5th IFAC Symposium on Power Plants and Power Systems Control, 2006

Location: Ecole Nationale Superieure en Genie des Systemes Industriels, Canada

Start Date: Sun Jun 25 2006 - End Date: Wed Jun 28 2006

Page Numbers: 119-124