• Title, Summary, Keyword: TCSC

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A Study on the Operating-Mode Characteristics of Two-Module Thyristor Controlled Series Compensator (Two-Module TCSC의 운전모드 특성 연구)

  • Jeong, Gyo-Beom
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.48 no.11
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    • pp.1410-1416
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    • 1999
  • This paper aims at investigating the operating-mode characteristics of two-module Thyristor Controlled Series Compensator (TCSC) as an equivalent of the multi-module TCSC in a simple three-phase power transmission system. The load flow program is developed to analyze the steady-state characteristics of two-module TCSC system and to find the thyristor firing angles for the required real power flow. The stability calculation program is developed with Poincare mapping theory. Simulation studies of the TCSC power transmission system using EMTP are performed to evaluate the transient characteristics of two-module TCSC as a real power flow controller and to rpove the results of the load flow calculation and the stability analysis. In the process of the study, the operating-mode characteristics of two-module TCSC are evaluated and compared to those of single-module TCSC.

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An Investigation of Characteristics of the Operating Modes of Two-Module Thyristor Controlled Series Compensator

  • Chung, Gyo-Bum
    • Proceedings of the KIPE Conference
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    • pp.903-908
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    • 1998
  • This paper aims at investigating the characteristics of the operating modes of two-module Thyristor Controlled Series Compensator (TCSC) in a power transmission system. The operating modes of two-module TCSC are defined, analyzed and compared to those of single-module TCSC are defined, analyzed and compared to those of single-module TCSC. The load flow program, the stability calculation program and Electro Magnetic Transient Program (EMTP) simulation of a TCSC power transmission system are developed for the performance evaluation of two-module TCSC as a power flow controller. In the process of the simulation study, the potential problem areas of the TCSC power transmission system are identified.

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Design and Implementation of a Laboratory Scale TCSC (모델급 TCSC의 설계 및 구현)

  • Dinh, Minh-Chau;Park, Sang-Min;Kim, Sung-Kyu;Park, Minwon;Yu, In-Keun
    • Proceedings of the KIEE Conference
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    • pp.351-352
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    • 2015
  • Thyristor-controlled series capacitor (TCSC) is a power electronic-based device that provides a fast and controllable series compensation of transmission line reactance. To match with laboratory facilities and for further research initiatives, a practical laboratory scale TCSC was designed and fabricated in this paper. The TCSC parameters were designed based on the terminologies such as percentage of compensation, boost factor and resonance factor. According to the design parameters, a prototype laboratory scale TCSC with a constant reactance controller was fabricated and tested. The measured results from the laboratory scale TCSC demonstrate the ability of the TCSC to provide rapid control of series reactance of a transmission line.

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Sensitivity Analysis of Oscillation Modes Occurred by Periodic Switching Operations of TCSC in Discrete Power Systems (이산 전력시스템에서 TCSC의 주기적 스위칭 동작에 의한 진동모드의 감도해석)

  • Kim, Deok-Young
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.22 no.2
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    • pp.162-168
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    • 2008
  • In this paper, the RCF(Resistive Companion Form) analysis method is applied to analyze small signal stability of power systems including thyristor controlled FACTS(Flexible AC Transmission System) equipments such as TCSC(Thyristor Controlled Series Capacitor). The eigenvalue sensitivity analysis algorithm in discrete systems based on the RCF analysis method is presented and applied to the power system including TCSC. As a result of simulation, the RCF analysis method is very useful to precisely calculate the variations of eigenvalues or newly generated unstable oscillation modes after periodic switching operations of TCSC. Also the eigenvalue sensitivity analysis method based on the RCF analysis method enabled to precisely calculate eigenvalue sensitivity coefficients of controller parameters about the dominant oscillation mode after periodic switching operations in discrete systems. These simulation results are different from those of the conventional continuous system analysis method such as the state space equation and showed that the RCF analysis method is very useful to analyze the discrete power systems including periodically operated switching equipments such as TCSC.

The Effect of Thyristor Controlled Series Capacitor(TCSC) on Power Transfer Capability (TCSC 투입계통의 송전용량 증대에 대한 연구)

  • Lee, Joo-Ho;Lee, Byoug-Jun
    • Proceedings of the KIEE Conference
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    • pp.890-892
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    • 1998
  • TCSC is a FACTS device that can control the active power flow and current of transmission lines by adjusting line impedances. In this paper, we study the effect of TCSC on power transfer capability. A static model of TCSC is implemented in the continuation power-flow(CPF) Program and the power transfer capability is measured using the CPF. The site of TCSC is selected to increase power transfer capability by the sensitivity information provided from the CPF. The effect of TCSC with various control mode is tested in IEEE New England 30-bus system.

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Design of GA-Fuzzy Precompensator of TCSC-PSS for Enhancement of Power System Stability (전력계통 안정도 향상을 위한 TCSC 안정화 장치의 GA-퍼지 전 보상기 설계)

  • Wang Yong-Peel;Chung Mun-Kyu;Chung Hyeng-Hwan
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.54 no.2
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    • pp.51-60
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    • 2005
  • In this paper, we design the GA-fuzzy precompensator of a Power System Stabilizer for Thyristor Controlled Series Capacitor(TCSC-PSS) for enhancement of power system stability. Here a fuzzy precompensator is designed as a fuzzy logic-based precompensation approach for TCSC-PSS. This scheme is easily implemented by adding a fuzzy precompensator to an existing TCSC-PSS. And we optimize the fuzzy precompensator with a genetic algorithm for complements the demerit such as the difficulty of the component selection of fuzzy controller, namely, scaling factor, membership function and control rules. Nonlinear simulation results show that the proposed control technique is superior to conventional TCSC-PSS in dynamic responses over the wide range of operating conditions and in convinced robust and reliable in view of structure.

SVC & TCSC Effects Power System in Multi-Machine (다기계통에서의 SVC와 TCSC특성 해석)

  • Sul, Yong-Tae
    • Proceedings of the KIEE Conference
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    • pp.658-660
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    • 1996
  • This paper prescribe the effects of SVC & TCSC in multi-machine power system. EMTP models of two FACTS controllers are proposed to analysis the basic characteristics of SVC & TCSC and the control signal of TCR is determined by rms value which was measured in system. The oscillation model of generator is proposed to analysis the damping effect and the most effective location of TCSC in multi-machine power system is identified by the residues associated with the natural oscillation modes. The 3 generator-9 bus model system is used to demonstrate the applicability of the proposed model.

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A Study on the Structure of System State Matrix considering TCSC (TCSC를 고려한 계통상태행렬 구조에 관한 연구)

  • Rho, K.M.;Jang, B.H.;Kim, D.Y.;Lee, J.S.;Kwon, S.H.
    • Proceedings of the KIEE Conference
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    • pp.1056-1059
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    • 1997
  • Thyristor-Controlled Series Compensation (TCSC) is expected to be applied in transmission systems to achieve a number of benefits. TCSC can provide such assistance for stability, as well as helping to direct flows onto desired transmission paths. This paper describess a TCSC model which can be used for typical transient and oscillatory stability studies. Also included is a discussion on relevant information to extend the modeling detail of the TCSC for use stability analysis.

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THE COORDINATED CONTROL OF TCSC AND PSS TO IMPROVE POWER SYSTEM DAMPING (저주파 진동 감쇠를 위한 PSS와 TCSC의 협조 제어)

  • Kim, T.H.;Seo, J.C.;Moon, K.S.;Son, K.M.;Lee, S.S.;Park, J.K.;Moon, S.I.
    • Proceedings of the KIEE Conference
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    • pp.652-654
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    • 1996
  • A study of the coordinated control of a TCSC and an existing PSS is presented when both are used to damp the low frequency oscillations. TCSC is modeled by the first order delay model. Linear quadratic Gaussian controller is used for designing PSS and TCSC supplementary controller. The performance of the proposed controllers is simulated in a one machine infinite bus model. As a result, it is shown that to damp the low frequency oscillations efficiently, it is necessary to control TCSC and PSS simultaneously.

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The Determination of TCSC Controller Parameters for Damping Power System Oscillations (전력시스템 동요 억제를 위한 TCSC 제어기의 파라메타 결정)

  • Lee, Byung-Ha;Son, Kwang-Myoung;Han, Hak-Guhn;Park, Jong-Keun
    • Proceedings of the KIEE Conference
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    • pp.661-663
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    • 1996
  • The thyristor controlled series compensator can vary the impedance continuously to levels below and up to the line's natural impedance, thus enabling transmission line capability to be increased and power flow to be controlled. The dynamic performance of TCSC to increase the power system damping is mainly analyzed in this paper. The TCSC controller used here is of the PID type and the input signal to the controller is the active power flow through the TCSC. The TCSC parameters are determined so as to minimize the modal performance measure for duping of power system oscillations.

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