Coordinated Control of the Under Load Tap Changer

ULTC의 협조제어

  • Published : 2003.09.01

Abstract

The target of the ULTC(Under Load Tap Changer) control purpose is to minimize the operation number of the tap of the ULTC doing the error voltage which is the difference between the measured bus voltage End the reference bus voltage of the receiving end becomes less than the tolerance limits. The existing ULTC control method controls each ULTC considering only its bus voltage of the receiving end. However, this method did not cons der the coordinated control of the ULTCs of the system. In this paper, I proposed a coordinated control of the ULTC in :he loop power system using the Jacobian matrix. To show the validity of the proposed method, I made simulations for three cases: no action of the ULTC, the control of the ULTC by the existing control method, and the control of the ULTC by the coordinated control among the ULTCs of the system. The simulation result shows that the proposed method has more improvement of the operation of the ULTC than other methods.

Keywords

References

  1. M. S. Calovic, 'Modeling and analysis of underload tap changing transformer control system,' IEEE Trans. on Power Apparatus and systems, Vol. Pas-103, No. 7, July 1984, pp. 1909-1915 https://doi.org/10.1109/TPAS.1984.318657
  2. M. Larsson and D. Karlsson, 'Coordinated control of cascaded tap changers in a radial distribution network,' Proc. of IEEE/KTH Stockholm Power Tech. Conf., Sweden, June 1995, pp. 686-691
  3. N. Yorino, M. Danyoshi and M. Kitagawa, 'Interaction among multiple controls in tap change under load transformers,' Proc. of IEEE/PES winter meeting, Jan., 1996, 96 WM 310-3 PWRS https://doi.org/10.1109/59.575757
  4. 김홍균, '다중 부하시 탭 절환기의 협조 제어,' 서울대학교 대학원 석사학위논문, 1997
  5. 문경섭, '전압안정도를 고려한 SVC와 ULTC의 협조제어', 서울대학교 대학원 석사학위논문, 1998
  6. Paul M. Anderson, 'Power System Control and Stability', IEEE Pres, 1977