• Title/Summary/Keyword: STATCOM

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The Dynamic Characteristics Analysis of the STATCOM According to the Realization of the STATCOM Output Voltage (STATCOM의 출력전압 구현방식에 따른 동특성 해석)

  • Kim, Seon-Ho;Won, Dong-Jun;Han, Hak-Geun;Lee, Song-Geun;Mun, Seung-Il
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.49 no.7
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    • pp.323-331
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    • 2000
  • Recently Advanced Static Var Compensators(ASVC) or STATic Synchronous COMpesator(STATCOM) has been considered as a next generation reactive power controller. The STATCOM is a voltage source inverter(VSI) based on the static VAr compensator with only small capacitors on the dc side. The main function of the STATCOM is to keep the bus voltage magnitude at the desired value. This paper compared the PAM STATCOM with the PWM STATCOM. The characteristics and the control method of each model is analyzed. And the simulation of STATCOMs based on the above two methods is presented.

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Quasi-Steady-State Analysis on the Effect of the STATCOM on FRT Performance of Fixed Speed Wind Turbines (준정상상태 해석을 통한 고정속 풍력 발전기의 FRT에 대한 STATCOM의 효과 분석)

  • Ahn, Seon-Ju;Hwang, Pyeong-Ik;Nam, Soon-Ryul;Kang, Sang-Hee;Moon, Seung-Il
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.4
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    • pp.686-692
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    • 2010
  • This paper analyzes the effect of the STATCOM on the improvement of the Fault Ride Through (FRT) capability of the fixed speed wind turbines(FSWTs). The steady-state models of the wind farm components, such as induction generator, capacitor bank, and the STATCOM, are developed based on the simplified equivalent circuit. Especially, the STATCOM is modeled as a controllable current source and a method that analytically determines the magnitude of the injection current is developed. For the quasi-steady-state(QSS) analysis, the steady-state model of the generator and STATCOM are merged with the dynamic model of drive train. The QSS simulation with the STATCOM shows that the STATCOM can enhance the FRT performance by improving the $W_r-T_e$ characteristics of the FSWTs.

Design of Control Algorithm for BTB STATCOM Composed of Multi-Pulse Inverter and PWM Inverter (다중펄스 방식과 PWM 방식을 이용한 BTB STATCOM의 제어 알고리즘 개발)

  • Yeo, Sang-Min;Choi, Jong-Yun;Suh, In-Young
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.1149-1150
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    • 2011
  • 일반적으로 BTB STATCOM은 계통 분리 운전이나 이종계통의 연계 등의 목적으로 이용한다. 기본 구성으로는 두 대의 STATCOM을 직렬로 연결하여 계통에 삽입되며, 구조 및 개념상 HVDC와 유사한 특징을 갖고 있다. 본 논문에서는 국내에서는 처음으로 독자 개발에 성공한 STATCOM의 기술을 바탕으로 BTB STATCOM의 제어 알고리즘을 설계하고, PSCAD/EMTDC를 이용하여 BTB STATCOM의 모델링 및 계통 연계 모의를 수행하였다. 모델링 및 모의를 통하여 설계 및 개발한 BTB STATCOM의 제어 알고리즘이 정상동작하며, 성공적으로 BTB STATCOM의 역할을 수행할 수 있음을 확인하였다.

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Robust Stability Analysis of STATCOM System for Power Quality Enhancement (전력 품질 개선을 위한 STATCOM 시스템의 강인 안정도 해석)

  • Sung, Hwa-Chang;Park, Jin-Bae;Tak, Myung-Hwan;Joo, Young-Hoon
    • Journal of the Korean Institute of Intelligent Systems
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    • v.20 no.2
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    • pp.220-225
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    • 2010
  • This paper deals with the robust stability analysis of STATCOM (Static Synchronous Compensator) power system for power quality enhancement and power system stability. The STATCOM plays an important role in controlling the reactive power flow to the power network and hence the system voltage fluctuations and stability. The control areas of this plant are very large and the overall composition of the system is nonlinear. Also, STATCOM is influence of the uncertainties so that it is necessary to apply the new control technique. For solving these problems, we perform the fuzzy modeling and robust analysis for STATCOM system.

STATCOM Control for Balancing the Unbalanced Loads (불평형 부하의 평형화를 위한 STATCOM 제어)

  • Im, Su-Saeng;Lee, Eun-Ung;Kim, Hong-Gwon
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.49 no.8
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    • pp.522-528
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    • 2000
  • In this paper, a static synchronous compensator(STATCOM), which in general compensates reactive power, is proposed in order to balance the unbalanced loads. Reference values for the compensation of the unbalanced loads currents are determined by 3-phase circuit analysis result. Also the STATCOM control unit is designed considering the proposed compensation scheme for the unbalanced loads. As a result, the effectiveness of the STATCOM for balancing the load currents is verified by computer simulations.

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A Study on Local Coordinative Reactive Power Control between STATCOM and Other Reactive Power Controllers for Voltage Stability Improvement at Substation (변전소 전압안정화를 위한 STATCOM과 기존 조상 설비간의 지역 무효전력 협조제어에 관한 연구)

  • Jeong, Ki-Seok;Chang, Byun-Hoon;Lee, Hyun-Chul;Lee, Geun-Joon;Baek, Young-Sik
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.3
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    • pp.525-530
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    • 2010
  • Installation of FACTS(Flexible AC Transmission System) device can maximize utilization of existing power facilities and reliability of power system. STATCOM has excellent characteristics in operating cost, maintaining facilities, loss and so on. However, STATCOM has a disadvantage of facility cost over capacity. So it is effective to coordinate STATCOM and existing external bank(capacitor and reactor) and OLTC(On Load Tap Changer). This paper mainly proposes coordinative control method between STATCOM installed within substation and other reactive power resources including Shunt Reactors and Shunt Capacitors and OLTC for voltage stability improvement. The proposed coordinative control method is developed for the STATCOM of Mi-gum substation and the simulation results of EMTP/RV model show the effectiveness of the proposed method.

Grid Connection of Windfarm by BTB STATCOM (BTB STATCOM을 이용한 풍력발전의 계통 연계)

  • Yeo, Sang-Min;Choi, Jong-Yun;Kim, Jun-Sung;Suh, In-Young;Kim, Chul-Hwan
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.447-448
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    • 2011
  • 일반적으로 BTB STATCOM은 계통 분리 운전이나 이종계통의 연계 등의 목적으로 이용한다. 기본 구성으로는 두 대의 STATCOM을 직렬로 연결하여 계통에 삽입되며, 구조 및 개념상 HVDC와 유사한 특징을 갖고 있다. 본 논문에서는 국내에서는 처음으로 독자 개발에 성공한 STATCOM의 기술을 바탕으로 BTB STATCOM을 개발하고, PSCAD/EMTDC를 이용하여 BTB STATCOM의 모델링 및 계통 연계 모의를 수행하였다. 풍력발전의 발전량이 변하더라도 BTB STATCOM이 응동하여 실제 발전량을 정상적으로 전달하고 있음을 확인하였다.

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Operation Analysis of Back-to-Back STATCOM with Multi-Pulse Converter and PWM Converter (다중펄스 컨버터와 PWM 컨버터로 구성된 Back-to-Back STATCOM의 동작 분석)

  • Lee, Hye-Yeon;Han, Byung-Moon
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.905_906
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    • 2009
  • 본 논문은 한전 전력연구원이 주관하고 명지대학교와 (주)효성이 참여하는 연구과제의 결과물로써 다중펄스 컨버터와 PWM 컨버터로 구성된 20MVA급 Back-to-Back STATCOM의 시스템 구성 및 제어 동작특성에 대하여 정리하였다. 한전 전력연구원과 (주)효성이 국책과제를 통해 순수 국내기술로 개발한 10MVA급 다중펄스 STATCOM의 활용방안으로 10MVA급 PWM STATCOM 1기를 추가하여 두 STATCOM 각각의 DC link단을 연계시킨 20MVA급 Back-to-Back STATCOM을 구성하고 제어 알고리즘을 개발하였다. 또한 PSCAD/EMTDC 소프트웨어를 이용하여 개발한 Back-to-Back STATCOM의 제어 및 동작특성을 분석하였다.

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Development of a Large Scale STATCOM Using Double-Connected Multistep Inverter (이중접속방식의 멀티스텝 인버터를 이용한 대용량 STATCOM의 개발)

  • 김태훈;배영상;최세완;이왕하
    • The Transactions of the Korean Institute of Power Electronics
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    • v.9 no.1
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    • pp.36-41
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    • 2004
  • In this paper a large scale STATCOM using double-connected multi-step inverter is proposed and operating principle along with control method is detailed. A simple auxiliary circuit including an interphase transformer is employed to improve output voltage waveform of 12-step into 36-step. The proposed scheme could be a cost effective approach in high power applications such as 10MVar to 30MVar STATCOM. Experimental results from a 2KVA laboratory prototype show validity of the proposed method.

The Development of Transient Analysis Model and Performace Analysis of 345[kV] 100[MVA] STATCOM (345[kV] 100[MVA] STATCOM 과도해석 모델 개발 및 동특성 분석)

  • Yoon, Jong-Su
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.6
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    • pp.28-34
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    • 2011
  • This paper describes the development of the transient analysis model of 345[kV] 100[MVA] STATCOM and the result of the performance analysis. The Korea power utility company, KEPCO began a commercial operation of a 100[MVA] STATCOM(Static synchronous COMpensator) at 345[kV] Migeum substation in Seoul. In order to operate a new control device like STATCOM to the power system, suitable transient model is needed. Therfore, Korea Electric Power Coporation(KEPCO) developed a transient analysis models using EMTDC/PSCAD. The development of this transient analysis model is based on the actual STATCOM S/W algorithm and H/W specification that was provided by its manufacture. Through this model, the transient/dynamic performance of STATCOM at Migeum substation can be analyzed.