Adaptive automatic generation control with superconducting magnetic energy storage in power systems

Tripathy, S.C.; Balasubramanian, R.; Nair, P. S. Chandramohanan

doi:10.1109/60.148563

Cited by 83 publications

(43 citation statements)

References 12 publications

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“…In this paper, a two-area interconnected system (400 MW : 2,000 MW) with reheat steam turbine 12 is used to design and evaluate the effects of the power modulation controller of HVDC link. System data are given in an appendix.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

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Untitled

Ngamroo¹

2002

ScienceAsia

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This paper presents a new application of High Voltage Direct Current (HVDC) link to stabilization of frequency oscillations in a parallel AC-DC interconnected power system. When an interconnected AC power system is subjected to a large load with rapid change, system frequency may be considerably disturbed and becomes oscillatory. By utilizing the system interconnections as the control channels of HVDC link, the tie-line power modulation of HVDC link through interconnections is applicable for stabilizing the frequency oscillations of AC systems. In the design of power modulation controller, the technique of overlapping decompositions and the eigenvalue assignment are applied to establish the state feedback control scheme. To evaluate control effects, a linearized model of a parallel AC-DC interconnected system, including a power modulation controller of HVDC link, is investigated by simulation study. Simulation results show that the proposed controller is not only effective in damping out frequency oscillations, but also capable of alleviating the transient frequency swing caused by a large load disturbance.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

“…The linearized model of a two-area interconnected system 12 including the dynamic of power modulation controller of HVDC link is delineated in Fig 2 where the dynamics of governors in both areas are eliminated. The power modulation controller is modeled as a proportional controller of active power.…”

Section: Control Designmentioning

confidence: 99%

Untitled

Ngamroo¹

2002

ScienceAsia

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“…3 shows the configuration of a thyristor controlled SMES unit (S.C. Tripathy, et al, 1997). The SMES unit contains DC superconducting Coil and converter which is connected by Y-D/Y-Y transformer.…”

Section: Smes Unitmentioning

confidence: 99%

Decentralized controller gain scheduling using PSO for power system restoration assessment in a two-area interconnected power system

Jayanthi¹,

Chidambaram²,

Banusri³

2011

Int. J. Eng. Sci. Tech

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Load Frequency Control (LFC) is one of the most important issues in electrical power system design/operation and is becoming much more significant recently with increasing size, changing structure and complexity in restoration of interconnected power systems. In practice, LFC systems are used with simple Proportional-Integral (PI) or Integral (I) controllers. However, since the PI or I control parameters are usually tuned based on classical or trial-and-error approaches, they are incapable of obtaining good dynamic performance if the power system is more vulnerable due to various load changing scenarios in multi-area power system. For this reason, in this study the P and I control parameters are tuned based on Particle Swarm Optimization (PSO) algorithm for a better Load-Frequency Control in a Two-Area Two-Unit Thermal Reheat Power System (TATURIPS) with step load perturbation. To exemplify the optimum parameter search PSO is used as it is an optimization method, therefore, even in the uncertainty area of controller parameters, finds the best parameters for controller and obtained controller is an optimal controller. This makes a trade-off between exploration and exploitation of search space to find global optimum in less number of generations. A TATURIPS is taken for the study to illustrate the proposed method. To show effectiveness of proposed method, the performance of optimized PI controller is obtained with several time-domain simulations for various load changes scenarios and is presented. Simulation results emphasis on the better settling time based stability performance of optimized PI controller in the TATURIPS with GT unit when compared with that of the SMES and the conventional system two-unit two-area interconnected power systems.

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“…An attempt to use battery energy storage system (BESS) to improve the LFC dynamics of West Berlin Electric Power Supply has appeared in the literature [2,3]. The problems like low discharge rate, increased time required for power flow reversal and maintenance requirements have led to the evolution of superconducting magnetic energy storage (SMES) for their applications as load frequency stabilizers [4][5][6][7]. However SMES is expensive and requires a continuously operating liquid helium system.…”

Section: Introductionmentioning

confidence: 99%