Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on System Configuration of Grid-connected CTTS System with Soft Switching

소프트 절환이 가능한 계통 연계형 CTTS 시스템 구성에 관한 연구

  • 이형묵 (전남대학교 전기공학과) ;
  • 양지훈 (전남대학교 전기공학과) ;
  • 이정환 ((주)지엔이피에스, 연구소) ;
  • 박성미 (한국승강기대 승강기공학부) ;
  • 박성준 (전남대학교 전기공학과)
  • Received : 2018.10.08
  • Accepted : 2018.12.05
  • Published : 2018.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper proposes a grid - connected CTTS system that can be soft switched to meet the government's effective resource allocation policy for emergency generator. In order to eliminate the system instability caused by the large inrush current generation in the system switching, a new virtual rotation coordinate method for the dissimilar power source is proposed. The proposed virtual rotation coordinate method improves the voltage detection accuracy of the voltage difference of the dissimilar power supply, and it is proved that the synchronous switching characteristic is excellent. In addition, zero current and system stabilization can be achieved by realizing zero current when blocking CTTS with instantaneous reactive power control. Simulation was carried out to verify the validity of the proposed method, and the 500[kVA] system was fabricated and verified to demonstrate the superiority of the proposed method.

Keywords

SOOOB6_2018_v21n6_361_f0001.png 이미지

Fig. 1 Technology Development Trend of CTTS

SOOOB6_2018_v21n6_361_f0002.png 이미지

Fig. 2 Block diagram of the proposed uninterruptible power system

SOOOB6_2018_v21n6_361_f0003.png 이미지

Fig. 3 Basic principle of synchronous coordinate system

SOOOB6_2018_v21n6_361_f0004.png 이미지

Fig. 5 Linkage time characteristics by the proposed virtual synchronous coordinate system

SOOOB6_2018_v21n6_361_f0005.png 이미지

Fig. 6 Characteristics of Connected Type CTTS Controller with Switching of Zero Power

SOOOB6_2018_v21n6_361_f0006.png 이미지

Fig. 7 500 [kVA] linked CTTS installation photograph

SOOOB6_2018_v21n6_361_f0007.png 이미지

Fig. 8 Characteristics of generator voltage control during load fluctuation

SOOOB6_2018_v21n6_361_f0008.png 이미지

Fig. 9 CTTS characteristics during power outage and restoration

SOOOB6_2018_v21n6_361_f0009.png 이미지

Fig. 10. Start-up characteristics at connection

SOOOB6_2018_v21n6_361_f0010.png 이미지

Fig. 11 Load sharing in linkage mode

Fig. 4 The basic principle of the proposed virtual synchronous coordinate system

SOOOB6_2018_v21n6_361_t0001.png 이미지

References

  1. Sewan Heo, Wan-Ki Park, Ilwoo Lee, "A novel technique for fault and lifetime-diagnosis of closed transition transfer switch using dual lines," Pulsed Power (PPC), pp. 1-6, (2017).
  2. Ronold W. Hotchkiss, "Surge protection of automatic transfer switches-Application no," PES General Meeting, pp. 1-4. (2014).
  3. Hussain A. Attia, Hew W. Ping, Yousif Al-Mashhadany, "Design and analysis for high performance synchronized inverter with PWM power control," Clean Energy and Technology(CEAT), pp. 265-270, (2013).
  4. Bing Tian, Chengxiong Mao, Jiming Lu, Dan Wang, Yu He, Yuping Duan, Jun Qiu, "400 V/1000k kVA Hybrid Automatic Transfer. IEEE Transactions on Industrial Electronics," pp.5422-5435, (2013).
  5. M. Qaisar Azeem, Habib-ur-Rehman, "Design and analysis of switching in automatic transfer switch for load transfer," Open Source Systems & Technologies (ICOSST), pp. 129-134. (2016).