• Title, Summary, Keyword: TCSC

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The Design and Implementation of a Control System for TCSC in the KERI Analog Power Simulator

  • Jeon, Jin-Hong;Kim, Kwang-Su;Kim, Ji-Won;Oh, Tae-Kyoo
    • KIEE International Transactions on Power Engineering
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    • v.4A no.3
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    • pp.129-133
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    • 2004
  • This paper deals with the design and implementation of a TCSC (Thyristor Controlled Series Capacitor) simulator, which is a module for an analog type power system simulator. Principally, it presents configuration of controller hardware/software and its experimental results. An analog type power system simulator consists of numerous power system components, such as various types of generator models, scale-downed transmission line modules, transformer models, switches and FACTS (Flexible AC Transmission System) devices. It has been utilized for the verification of the control algorithm and the study of system characteristics analysis. This TCSC simulator is designed for 50% line compensation rate and considered for damping resister characteristic analysis. Its power rate is three phase 380V 20kVA. For hardware extendibility, its controller is designed with VMEBUS and its main CPU is TMS320C32 DSP (Digital Signal Processor). For real time control and communications, its controller is applied to the RTOS (Real Time Operation System) for multi-tasking. This RTOS is uC/OS-II. The experimental results of capacitive mode and inductive mode operations verify the fundamental operations of the TCSC.

Maximization of Transmission System Loadability with Optimal FACTS Installation Strategy

  • Chang, Ya-Chin;Chang, Rung-Fang
    • Journal of Electrical Engineering and Technology
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    • v.8 no.5
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    • pp.991-1001
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    • 2013
  • Instead of building new substations or transmission lines, proper installation of flexible AC transmission systems (FACTS) devices can make the transmission networks accommodate more power transfers with less expansion cost. In this paper, the problem to maximize power system loadability by optimally installing two types of FACTS devices, namely static var compensator (SVC) and thyristor controlled series compensator (TCSC), is formulated as a mixed discrete-continuous nonlinear optimization problem (MDCP). To reduce the complexity of the problem, the locations suitable for SVC and TCSC installations are first investigated with tangent vector technique and real power flow performance index (PI) sensitivity factor and, with the specified locations for SVC and TCSC installations, a set of schemes is formed. For each scheme with the specific locations for SVC and TCSC installations, the MDCP is reduced to a continuous nonlinear optimization problem and the computing efficiency can be largely improved. Finally, to cope with the technical and economic concerns simultaneously, the scheme with the biggest utilization index value is recommended. The IEEE-14 bus system and a practical power system are used to validate the proposed method.

The Design and Implementation of TCSC System for KERI Simulator (KERI 시뮬레이터 적용을 위한 TCSC 시스템 설계)

  • Jeon, Jin-Hong;Kim, Kwang-Su;Kim, Ji-Won;Chun, Yeung-Han
    • Proceedings of the KIEE Conference
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    • pp.220-223
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    • 2003
  • 본 논문에서는 한국전기연구원에서 보유하고 있는 아날로그형 전력계통 시뮬레이터인 KERI 시뮬레이터에 적용하고자 개발 중인 TCSC 시스템 시뮬레이터의 설계 방법과 적용 결과를 제시하고 한다. KERI 시뮬레이터는 전력계통시스템을 모의하기위해 한국전기연구원에서 보유하고 있는 실험장비로 3개의 동기발전기와 345kV 송전선로 모델, 각종 계통 설비의 축소 모형으로 구성되어 있다. 지금까지 UPFC, STATCOM과 같은 FACTS 모의장치의 계통 적용을 검토하기 위한 연구가 이루어져 왔다.

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Sensitivity analysis of oscillation modes occurred by periodic switching operations of TCSC (TCSC의 주기적 스위칭 동작에 의한 진동모드의 감도해석)

  • Kim, Deok-Young;Dong, Moo-Hwan
    • Proceedings of the KIEE Conference
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    • pp.644-645
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    • 2007
  • In this paper, the eigenvalue sensitivity analysis algorithm in discrete systems by the RCF method are presented and applied to the power system including TCSC. The RCF analysis method enabled to precisely calculate eigenvalue sensitivity coefficients of dominant oscillation modes after periodic switching operations. These simulation results are very different from those of the conventional continuous system analysis method such as the state space equation method

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Real-Time Estimation of TCSC Quantity for Improvement of Transient Stability Energy Margin (과도안정도 에너지 마진 향상을 위한 TCSC 적정치의 실시간 산정)

  • Kim, Soo-Nam;You, Seok-Ku
    • Proceedings of the KIEE Conference
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    • pp.242-244
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    • 2000
  • This paper presents a method for real-time estimation of TCSC quantity in order to enhance the power system transient stability energy margin using fuzzy neural network in multi-machine system. This paper has two parts, the first part is to estimate the energy margin. To set critical energy, we use the potential energy boundary surface(PEBS) method which one of the transient energy function(TEF) method. And the second is to determine the TCSC quantify and the line to be injected. In order to make training data in this step, we use genetic algorithm. The proposed method is applied to 6-bus, 7-line, 4-machine model system to show its effectiveness.

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Analysis and Control of Low Frequency Oscillation using TCSC Small Signal Model by Control of Firing Angles (TCSC의 소신호 모형을 이용한 점호각 제어에 의한 저주파 진동 감쇠 효과 해석 및 제어)

  • Kim, Tae-Hyun;Seo, Jang-Cheol;Park, Jong-Keun;Moon, Seung-Ill;Han, Byung-Moon
    • Proceedings of the KIEE Conference
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    • pp.120-124
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    • 1995
  • TCSC can not only increase power flow but also damp low frequency oscillation by controlling firing angles of thyristors. But, a model considering voltage, current firing angles is not derived. This paper used a small signal model considirng these variables which was derived in paper [1]. TCSC model is combined with swing equation. Being related to rotor angles and firing angles of thyristors, current and synchronizing torque coefficient is reformulated. Because firing angles of thyristors can be controlled only twice within one period, swing equation is transformed to discrete time model. It is shown that low frequency oscillation can be damped by controlling firing angles in one machine infinite bus power system.

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Voltage Comparison-type TCSC Using Recursive Discrete Fouier Transform (순차 프리에 변환(DFT)를 이용한 전압비교형 TCSC TCSC(Thyristor Control led Series Compensation))

  • Ko, S.K.;Park, S.Y.;Park, J.K.
    • Proceedings of the KIEE Conference
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    • pp.79-81
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    • 1993
  • We have proposed a new technology compensating reactance component of line and load. Because capacity of SC is static, it is not appropriate to varing reactance and causes SSR problems. TCSC is introduced for the flecxible control of reactance of SC. If SC voltage is varied when the capacitor current is constant, it can be considered that capacity of SC was varied. SO capacity of SC can be controlled by controlling the voltage of SC. Control reference voltage of SC can be obtained from the condition that sum of reactive powers in all parts is zero.

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Design of a Robust TCSC Supplementary Controller to Suppress SSR in FACTS (유연송전시스템(FACTS)에서의 SSR 억제를 위한 강인한 TCSC 보조 제어기의 설계)

  • Seo, Jang-Cheol;Kim, Tae-Hyun;Moon, Seung-Ill;Park, Jong-Keun
    • Proceedings of the KIEE Conference
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    • pp.884-886
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    • 1998
  • This paper presents an LQG based robust TCSC supplementary controller design to suppress the SSR in the FACTS. This controller is designed to have the robust stability against the plant model uncertainty. The robust stability is guaranteed using the $\mu$ analysis. Time domain simulations using a nonlinear system model show that the proposed TCSC supplementary controller can suppress the SSR efficiently against the plant model uncertainty.

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Selection of Optimal TCSC Location to Keep the Steady-state Voltage Profile within limits (정상상태시 전압유지를 위한 TCSC의 최적 위치 선정에 관한 연구)

  • Lim, Jung-Uk;Seo, Jang-Cheol;Moon, Seung-Ill
    • Proceedings of the KIEE Conference
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    • pp.1063-1065
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    • 1998
  • This paper discusses the selection of optimal location of Thyristor Controlled Series Compensator (TCSC) devices to maintain the steady-state voltage profile within limits. A procedure for selecting optimal TCSC location based on sensitivity analysis is developed. This approach identifies the critical lines by evaluating all the voltage magnitudes sensitivity with respect to a line reactance. Computer simulation of a example system is used to verify the proposed procedure.

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SSR Control by Damping Controller of TCSC (TCSC의 Damping 제어를 이용한 SSR 제어)

  • Jeon, Jin-Hong;Chun, Yeong-Han;Kim, Ji-Won;Kim, Tai-Hyun;Kim, Hak-Man;Kook, Kyung-Soo
    • Proceedings of the KIEE Conference
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    • pp.142-144
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    • 2000
  • This paper presents an auxiliary TCSC controller designed for damping SSR. Damping controller for SSR is designed in frequency domain for suppressing resonance. The SSR phenomenon and the performance of damping controller simulated by using PSCAD/EMTDC. In this simulation. the power system model for SSR is IEEE benchmark Model and TCSC is simplified to controllable impedance model.

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