Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Innovative Model-Based PID Control Design for Bus Voltage Regulation with STATCOM in Multi-Machine Power Systems

STATCOM을 사용한 다기 전력 계통의 버스 전압 조절을 위한 모델 기반 PID 제어기 설계

  • 김석균 (고려대학교 전기공학과) ;
  • 이영일 (서울과학기술대학교 전기정보학과) ;
  • 송화창 (서울과학기술대학교 전기정보학과) ;
  • 김정수 (서울과학기술대학교 전기정보학과)
  • Received : 2012.12.26
  • Accepted : 2013.02.21
  • Published : 2013.04.01
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Abstract

The complexity and severe nonlinearity of multi-machine power systems make it difficult to design a control input for voltage regulation using modern control theory. This paper presents a model-based PID control scheme for the regulation of the bus voltage to a desired value. To this end, a fourth-order linear system is constructed using input and output data obtained using the TSAT (Transient Security Assessment Tool); the input is assumed to be applied to the grid through the STATCOM (STATic synchronous COMpensator) and the output from the grid is a bus voltage. On the basis of the model, it is identified as to which open-loop poles of the system make the response to a step input oscillatory. To reduce this oscillatory response effectively, a model-based PID control is designed in such a way that the oscillatory poles are no longer problematic in the closed loop. Simulation results show that the proposed PID control dampens the response effectively.

Keywords

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