• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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• pp.230-231
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• 2006

In this paper, the RCF(Resistive Companion Form) analysis method is used to analyze small signal stability of power systems including GTO controlled FACTS equipment such as SSSC. To apply the RCF analysis method in power system small signal stability problems, state transition equations of power system equipments and power systems with SSSC are presented. In eigenvalue analysis of power systems by the RCF analysis method, SSSC is modelled into the equivalents voltage source model and PWM switching circuit model. As a result of simulation, the RCF method is very powerful to calculate the oscillation modes exactly after the switching operations, and useful to analyze the small signal stability of power systems with periodic switching device such as SSSC.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 C
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• pp.1158-1160
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• 1999

This paper proposes a SSSC(Static Synchronous Series Compensator) power flow model to be incorporated into power flow calculation for the steady state analysis of the power system. SSSC provides controllable compensating voltage, which is in quadrature with the line current, over an capacitive and an inductive range, independently of the magnitude of the line current. This SSSC model is obtained from the injection model for series connected VSC(Voltage Source Converter) by adding a constraint that the injected voltage should be in quadrature with the line current. In this paper the static model is implemented into the continuation power-flow (CPF) program. It is shown that SSSC has its intrinsic superiority over TCSC in controllable power flow range.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 C
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• pp.1164-1166
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• 1999

This paper presents Static Synchronous Series Compensator(SSSC) model for power flow study using IPLAN. In the proposed model, SSSC is represented by the equivalent load variation. The equivalent load consists of active power load specified by user and reactive power load which is founded for considering characteristic of SSSC. And this is implemented by IPLAN which is a macro-external program for PSS/E. Using this model, SSSC can be solved in load-flow by just calling the model in PSS/E. The proposed model was applied to a realistic power system for validity test.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2006년도 전력전자학술대회 논문집
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• pp.181-184
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• 2006

FACTS 기술은 송전계통에 전압원 인버터를 설치하여 모선 전압과 전력조류를 제어하므로 송전용량 증대 및 계통 안정도 향상을 가능케하는 신기술이다. 국내에서는 2003년 최초의 FACTS Pilot Plant인 80MVA UPFC가 154kV 강진 변전소에 설치되었다. UPFC는 STATCOM과 SSSC가 DC 커패시터를 통하여 결합된 구조로 되어 모선전압과 유효/무효전력 조류의 독립적인 제어가 가능하며 계통 운전 상황에 따라 STATCOM과 SSSC의 단독운전 또한 가능하다. 따라서 STATCOM 및 SSSC 단독운전시의 계통영향에 대한 분석이 필요하다. 본 논문은 EMTDC 모델을 이용하여 현재 운전중인 강진 변전소 UPFC의 직렬 운전모드인 40MVA SSSC의 제어특성과 운전효과 분석에 대하여 기술하였다.

• Journal of Power Electronics
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• 제11권6호
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• pp.890-896
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• 2011

In this paper the impact of a SSSC and a STATCOM on the impedance calculated by a distance relay is investigated. Both analytical analysis and simulations are provided. The STATCOM/SSSC control systems are modeled in detail. It is demonstrated that a SSSC has a greater impact on the calculated impedance by an A-G distance relay element. Several scenarios are considered in the simulations like the impact of the fault conditions, the compensator settings, the power system conditions and so on. All the simulations are carried out in MATLAB/Simulink with detailed models of the SSSC and the STATCOM.

• 대한전기학회논문지:전력기술부문A
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• 제48권5호
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• pp.524-530
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• 1999

This paper describes performance analysis techniques for SSSC using computer simulations with EMPT and experiments with a hardware scaled-model. A switching-level simulation model with EMTP was developed for the SSSC connected in series with the transmission line. The increase of transmission capability and dynamic performance was analyzed with the simulation model. The simulation results were reverified by experimental works with a hardware scaled-model. The developed analysis techniques can be used for designing and evaluating actual system of SSSC.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 A
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• pp.174-176
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• 2004

FACTS 기술은 송전계통에 전압원 인버터를 설치하여 모선 전압과 전력조류를 제어하므로 송전용량 증대 및 계통 안정도 향상을 가능케하는 신기술이다. 국내에서는 2003년 최초의 FACTS Pilot Plant인 80MVA UPFC가 154kV 강진 변전소에 설치되었다. UPFC는 STATCOM과 SSSC가 DC 커패시터를 통하여 결합된 구조로 되어 모선전압과 유효/무효전력 조류의 독립적인 제어가 가능하며 계통 운전 상황에 따라 STATCOM과 SSSC의 단독운전 또한 가능하다. 따라서 STATCOM 및 SSSC 단독운전시의 계통영향에 대한 분석이 필요하다 본 논문은 EMTDC 모델을 이용하여 현재 운전중인 강진 변전소 UPFC의 직렬 운전모드인 40MVA SSSC의 제어특성과 운전효과 분석에 대하여 기술하였다.

• Smart Structures and Systems
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• 제22권1호
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• pp.81-94
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• 2018

Automatic Generation Control (AGC) has functionally controlled the interchange power flow in order to suppress the dynamic oscillations of frequency and tie-line power deviations as a perturbation occurs in the interconnected multi-area power system. Furthermore, Flexible AC Transmission Systems (FACTS) can effectively assist AGC to more enhance the dynamic stability of power system. So, Static Synchronous Series Compensator (SSSC), one of the well-known FACTS devices, is here applied to accurately control and regulate the load frequency of multi-area multi-source interconnected power system. The research and efforts made in this regard have caused to introduce the Fractional Order Proportional Integral Derivative (FOPID) based SSSC, to alleviate both the most significant issues in multi-area interconnected power systems i.e., frequency and tie-line power deviations. Due to multi-objective nature of aforementioned problem, suppression of the frequency and tie-line power deviations is formularized in the form of a multi-object problem. Considering the high performance of Multi Objective Bees Algorithm (MOBA) in solution of the non-linear objectives, it has been utilized to appropriately unravel the optimization problem. To verify and validate the dynamic performance of self-defined FOPID-SSSC, it has been thoroughly evaluated in three different multi-area interconnected power systems. Meanwhile, the dynamic performance of FOPID-SSSC has been accurately compared with a conventional controller based SSSC while the power systems are affected by different Step Load Perturbations (SLPs). Eventually, the simulation results of all three power systems have transparently demonstrated the dynamic performance of FOPID-SSSC to significantly suppress the frequency and tie-line power deviations as compared to conventional controller based SSSC.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 A
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• pp.239-241
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• 2000

This paper describes a modeling of a FACTS(Flexible AC Transmission System) device, namely, SSSC(Static Synchronous Series Compensator) model. The SSSC, a solid-state voltage source inverter coupled with a transformer, is connected in series with a transmission line. SSSC provides controllable compensating voltage, which is in quadrature with the line current, over an capacitive and an inductive range, independently of the magnitude of the line current. This SSSC model is obtained from the injection model for series connected VSC(Voltage Source Converter) by adding a constraint that the injected voltage should be in quadrature with the line current. The paper discusses the basic operating and performance characteristics of the SSSC, and power flow control in power system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.155-157
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• 2001

This paper presents an comparative study on the effect of SSSC and UPFC to the power system static analysis. SSSC is used to control active power flow in transmission lines by controlling the phase angle of the injected voltage source which is in rectangular to the line current. UPFC is used to control the magnitude and phase of the injected voltage sources which are connected both in series and in parallel with the transmission line to control power flow and bus voltage. To compare the effect of SSSC and UPFC in power system static analysis, the PSS/E simulation program is used. As the FACTS device model such as SSSC and UPFC is not provided in PSS/E yet, an equivalent load model is used. This procedure is implemented by IPLAN which is an external macro program of PSS/E. The simulation results show that UPFC is more effective to improve bus voltage than SSSC in power system static analysis.