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UPFC for Enhancing Power System Reliability
A. Rajabi-Ghahnavieh;M. Fotuhi-Firuzabad;M. Shahidehpour;R. Feuillet
This paper discusses various aspects of unified power flow controller (UPFC) control modes and settings and evaluates their impacts on the power system reliability. UPFC is the most versatile flexible ac transmission system device ever applied to improve the power system operation and delivery. It can control various power system parameters, such as bus voltages and line flows. The impact of UPFC ...Show More
Estimation of Temporary Overvoltages during Power System Restoration using Artificial Neural Network
2009 15th International Conference on Intelligent System Applications to Power Systems
Year: 2009 | Conference Paper |
Cited by: Papers (7)
The energization of power transformers following a complete or partial collapse of the system is an important issue. This paper presents an Artificial Neural Network (ANN)-based approach to estimate the temporary overvoltages (TOVs) due to transformer energization. In proposed methodology, Levenberg-Marquardt second order method is used to train the multilayer perceptron. The developed ANN is trai...Show More
New Approach to Harmonic Overvoltages Reduction during Transformer Energization via Controlled Switching
2009 15th International Conference on Intelligent System Applications to Power Systems
Year: 2009 | Conference Paper |
Cited by: Papers (7)
During early stage of primary restoration process, unexpected Overvoltages may happen due to nonlinear interaction between the unloaded transformer and the transmission system. The most effective method for the limitation of the switching overvoltages is controlled switching since the magnitudes of the produced transients are strongly dependent on the closing instants of the switch. We introduce a...Show More
A system wide scheme for mitigation of voltage instability
2009 IEEE/PES Power Systems Conference and Exposition
Year: 2009 | Conference Paper |
In this paper, a system wide scheme is proposed to arrest voltage instability. This scheme consists of two stabilizing and securing parts. For post-contingency situations, where there are no equilibrium solutions, first, the stabilizing scheme finds the closest solvable operating point, and then passes this point to the securing scheme. The securing scheme brings the solvable, but insecure operati...Show More
Optimal Allocation of Available Transfer Capability in Operating Horizon
A. Rajabi-Ghahnavieh;M. Fotuhi-Firuzabad;Mohammad Shahidehpour;R. Feuillet
IEEE Transactions on Power Systems
Cited by: Papers (6)
When there are transmission service requests for a specific sink/source pair in a transmission system, the ISO must allocate the available transfer capacity (ATC) of that pair to the requests. Since the requests could have different types, tariffs and time frames, the allocation must be accomplished in a sound and fair manner that incorporates various aspects of the requests. This paper proposes a...Show More
Optimal ATC Allocation in Power Systems
2008 Joint International Conference on Power System Technology and IEEE Power India Conference
Year: 2008 | Conference Paper |
Cited by: Papers (1)
When there are transmission service requests for a specific sink/source pair in a transmission system, the ISO must allocate the ATC of that pair to the requests. Since the requests could have different types, tariffs and time frame, the allocation must be accomplished in a sound and fair manner that considers various aspects of the requests. This paper proposes an approach to allocate the ATC to ...Show More
Evaluation of UPFC Impacts on Power System Reliability
2008 IEEE/PES Transmission and Distribution Conference and Exposition
Year: 2008 | Conference Paper |
Cited by: Papers (10)
This paper evaluates the reliability impact of UPFC application in power system. The paper proposes a new reliability model for the UPFC which is capable of considering different operating states of UPFC. The model is then applied to a test system to study the reliability impacts of UPFC. The impacts of operating points of different states of the model on the system reliability are analyzed. The r...Show More
Multi-port frequency-dependent network equivalent for electromagnetic transient studies
Proceedings of the 37th Annual North American Power Symposium, 2005.
Year: 2005 | Conference Paper |
Cited by: Papers (5)
Network equivalents can be used to represent parts of a power system to reduce the complexity and the computation time during the simulation of electromagnetic transients. The goal is to simplify the representation while preserving the accuracy of transients in the remainder. In this work a method is developed for construction of single and multi-port frequency dependent network equivalent (FNDE)....Show More
A Conceptual Structure for Value Based Pricing of Dynamic Reactive Power Support
2005 IEEE/PES Transmission & Distribution Conference & Exposition: Asia and Pacific
Year: 2005 | Conference Paper |
This paper presents a practical reactive power valuation method in which the VAr value is decomposed into two components. These components are basically different from those in the literature. Using a security constraint optimization model, the proposed scheme allocates two specific amounts of MW transactions to each generator as a dynamic reactive power source. The allocated amounts represent the...Show More
Generator VAr valuation based on MW shipment considerations in power markets
39th International Universities Power Engineering Conference, 2004. UPEC 2004.
Year: 2004 | Conference Paper |
This paper presents a reactive power valuation method with regarding to its effect on realization of MW transactions. The security constraint optimization model in which the objective function is maximization of transactions is solved by genetic algorithm approach. The proposed scheme allocates a specific amount of MW transactions to each dynamic reactive power source. An index is introduced to de...Show More
Valuation of dynamic reactive power support based on MW transaction implementation considerations
2004 Large Engineering Systems Conference on Power Engineering (IEEE Cat. No.04EX819)
Year: 2004 | Conference Paper |
Cited by: Papers (2)
This paper presents a reactive power valuation method with regarding to its effect on realization of MW transactions. The security constraint optimization model in which the objective function is maximization of transactions is solved by the genetic algorithm approach. The proposed scheme allocates a specific amount of MW transactions to each dynamic reactive power source. An index is introduced t...Show More
Stability study for the Vietnam power system
T. Tran-Quoc;Tuan A. Tran;S. Lam-Du;Tai A. Tran;B. Nguyen;A. Nguyen-Hong;R. Feuillet;Ch. Praing
2003 IEEE PES Transmission and Distribution Conference and Exposition (IEEE Cat. No.03CH37495)
Year: 2003 | Conference Paper |
Cited by: Papers (4)
The Vietnam power system is in phase of development. Due to the increase in the size by introducing the new power plants and new transmission lines in the Vietnam power system, the stability of this system becomes more complex. There are the interactions of different power plants and the oscillations of generators between Northern and Southern regions. This is why the stability must be studied in ...Show More
Analysis and control of temporary overvoltages for automated restoration planning
The paper presents a new approach that assists power system restoration planning with regards to control of temporary overvoltages (TOVs) due to transformer energization. The frequency-domain analysis in combination with analytical calculations is applied to find an optimum resonance condition. The analytical equations are based on sensitivity analysis for single frequencies and are extended to to...Show More
LMI versus non-linear techniques for the design of FACTS controller
2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309)
Year: 2002 | Conference Paper |
Cited by: Papers (3)
Most countries in different parts of the world have already deregulated their power industry (or are in the process of doing so). Deregulation has often resulted in a significant increase in power transfers across transmission lines. For weak interconnection, this situation may lead to more constraints on power system oscillations. One of the most constraining type of oscillations is the inter-are...Show More
In large interconnected networks, the number and the complexity of controllers are still increasing in order to enhance the performance of power systems. But the proximity between controllers leads to interactions between each other, also called "control interactions". These interactions are very often detrimental to the overall system performance : they are "adverse interactions". Design and co-o...Show More
An approach for optimal units start-up during bulk power system restoration
LESCOPE 01. 2001 Large Engineering Systems Conference on Power Engineering. Conference Proceedings. Theme: Powering Beyond 2001 (Cat. No.01ex490)
Year: 2001 | Conference Paper |
Cited by: Papers (21)
This paper describes an approach for unit start-up sequence determination during power system restoration. This approach is based on the backtracking search method, which determines the generating starting times to maximize the MWh load served over a restoration period and guarantee optimality of the start up sequence. The dynamic characteristics of different types of units and system constraints ...Show More
Damping controller input-signal loss effects on the wide-area stability of an interconnected power system
K. Mekki;A.F. Snyder;N. HadjSaid;R. Feuillet;D. Georges;T. Margotin
2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134)
Year: 2000 | Conference Paper |
Most countries in different parts of the world are getting closer to electricity industry deregulation. Deregulation has induced increase in network power transfers thus resulting in more constraint on power system oscillations. Now in big interconnected networks, the scope is becoming larger and larger. For instance, to cope with inter-area oscillations, power controllers need a more global visio...Show More
Accurate fault location algorithm for series compensated transmission lines
2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)
Year: 2000 | Conference Paper |
Cited by: Papers (5)
In this paper, an accurate fault location algorithm for series compensated power transmission lines is presented. A distributed time domain model is used for modeling of the transmission lines. The algorithm makes use of two subroutines for estimation of the fault distance-one for faults behind the series capacitors and another one for faults in front of the series capacitors. Then a special proce...Show More
Reducing dead time for single-phase auto-reclosing on a series-capacitor compensated transmission line
This paper presents a single-phase auto-reclosing study of a 500 kV Vietnamese transmission line. The success of the single-phase auto-reclosing depends on the extinction of the secondary arc. Therefore, the influences of several factors such as shunt and neutral reactors, faulted phase and location, capacitive and inductive coupling and series capacitor discharge on the extinction of secondary ar...Show More
Impact of FACTS devices on voltage and transient stability of a power system including long transmission lines
Ch. Praing;T. Tran-Quoc;R. Feuillet;J.C. Sabonnadiere;J. Nicolas;K. Nguyen-Boi;L. Nguyen-Van
2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134)
Year: 2000 | Conference Paper |
Cited by: Papers (11)
This paper investigates the possibility of the use of FACTS devices such as SVC, TCSC on the Vietnamese power system, including long transmission lines, in order to improve voltage and transient stability and power oscillation damping. The long-term time simulation is also presented with the help of the Eurostag program by taking into account dynamic aspects of FACTS devices. In order to evaluate ...Show More
Accurate fault location algorithm for series compensated transmission lines
In this paper, an accurate fault location algorithm for series compensated power transmission lines is presented. A distributed time domain model is used for modeling of the transmission lines. The algorithm makes use of two subroutines for estimation of the fault distance-one for faults behind the series capacitors and another one for faults in front of the series capacitors. Then a special proce...Show More
Improvement of voltage stability on the Vietnam power system
T. Tran-Quoc;C. Praing;R. Feuillet;J.C. Sabonnadiere;U. La-Van;C. Nguyen-Duc
2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)
Year: 2000 | Conference Paper |
Cited by: Papers (3)
This paper presents the calculation of several static indices for voltage collapse on the Vietnamese power system for two configurations. The long-term time simulation, by taking into account dynamic aspects, with the help of the Eurostag program is also presented. From these indices, countermeasures for voltage collapse on the Vietnam power system are proposed. Methods of voltage control and resc...Show More
A new method for dynamic calculation of load steps during power system restoration
One of important subject in load pickup that is not addressed, is selection of suitable load steps, especially in the initial phase of restoration. Operators are often concerned with the size of load, which can safely be picked-up, and the effectiveness of the generation reserve. Load pickup in small increments tends to prolong the restoration duration. With large increment, there is always the ri...Show More
Calculation of circuit breaker transient recovery voltages
PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)
Year: 1999 | Conference Paper |
This paper investigates the calculation of circuit breaker transient recovery voltages for the Vietnam 500 kV power system. Several events that can produce high transient recovery voltage levels on the 500 kV line breakers are studied, such as three-phase-to-ground, phase-to-phase grounded, phase-to-phase ungrounded and phase-to-ground fault clearing. The series capacitors protected by varistors, ...Show More
New method for fault location in power transmission lines using one terminal data
PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)
Year: 1999 | Conference Paper |
Cited by: Papers (1)
In this paper, a new method for fault location in power transmission lines is proposed. The idea of the introduced algorithm is that it considers the fault location problem as an optimization problem that can be solved by an appropriate mathematical method. Additionally, for finding the fault resistance the least-square estimation method is applied. The suggested technique only takes advantage of ...Show More
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