Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Grid-Connected Control of Hybrid Energy Storage

하이브리드 에너지 저장장치의 계통연계 제어

  • Lee, Eon-Seok (Department of Control and Instrumentation Engineering, Gyeongsang National University) ;
  • Kang, Byeong-Geuk (Department of Control and Instrumentation Engineering, Gyeongsang National University) ;
  • Choi, Yong-Oh (Department of Control and Instrumentation Engineering, Gyeongsang National University) ;
  • Chung, Se-Kyo (Department of Control and Instrumentation Engineering, Gyeongsang National University) ;
  • Oh, Se-Seung (Korea Institue of Energy Research) ;
  • Chae, Suyong (Korea Institue of Energy Research) ;
  • Song, Yujin (Korea Institue of Energy Research)
  • Received : 2014.12.17
  • Accepted : 2015.04.28
  • Published : 2015.08.31
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Abstract

This paper deals with a control method for a hybrid energy storage system (ESS) with a battery and super capacitor for grid-connected operation. To improve the grid regulation and to minimize the depth of discharge of the battery, control algorithms for the hybrid ESS are proposed. A p-q control with predictive current control is used for the inverters for the super-capacitor and the battery. To verify the effectiveness of the proposed control method, simulation studies using the PSIM and RTDS are carried out for the actual grid model.

본 논문에서는 하이브리드 에너지 저장장치의 계통연계 제어에 대하여 기술 하였다. 배터리는 큰 에너지 밀도를 가지지만 순간 전력밀도는 낮아 급격한 전류변동이 일어날 경우 수명이 저하된다. 이러한 단점을 보완하기 위해 수퍼커패시터를 함께 사용하는 하이브리드 에너지 저장장치를 구성하였고 이에 대한 제어방법을 제안하였다. 배터리와 수퍼커패시터의 제어를 위해서는 예측형 전류제어기를 가지는 p-q 제어방법을 적용하였다. 제안된 제어기의 효용성을 검증하기 위해 실제 계통모델에 대한 PSIM과 RTDS를 이용한 시뮬레이션을 수행하였다.

Keywords

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