Optimal Sizing of Distributed Power Generation System based on Renewable Energy Considering Battery Charging Method

배터리 충전방식을 고려한 신재생에너지 기반 분산발전시스템의 용량선정

  • Kim, Hye Rim (School of Mechanical Engineering, Inha University) ;
  • Kim, Tong Seop (Department of Mechanical Engineering, Inha University)
  • Published : 2021.10.30

Abstract

The interest in renewable energy-based distributed power generation systems is increasing due to the recognitions of the breakthrough of existing centralized power generation, energy conversion, and environmental problems. In this study, the optimal capacity was selected by simulating a distributed power generation system based on PV and WT using lead acid batteries as the energy storage system. CHP was adopted as the existing power source, and the optimal capacity of the system was derived through MOGA according to the operating modes(full load/part load) of the existing power source. In addition, it was confirmed that the battery life differs when the battery charging method is changed at the same battery capacity. Therefore, for economical and stable power supply and demand, the capacity selection of the distributed generation system considering the battery charging method should be performed.

기존의 중앙집중식 발전의 탈피와 에너지 전환 및 환경문제 인식에 의해 신재생에너지 기반의 분산발전시스템에 대한 관심이 증가하고 있다. 본 연구에서는 에너지저장장치로 납축전지를 사용하는 PV 및 WT 기반의 분산발전시스템을 모사하여 최적용량을 선정하였다. 기존 발전원으로 CHP를 채택하였으며 시스템의 최적용량은 기존발전원의 운전상황(전부하/부분부하)에 따라 MOGA를 통해 도출하였다. 또한 동일한 배터리 용량에서 배터리 충전방식이 달라지면 배터리의 수명이 달라지는 것을 확인하였다. 따라서 경제적이고 안정적인 전력수급을 위해서는 배터리 충전방식을 고려한 분산발전시스템의 용량선정이 수행되어야 한다.

Keywords

Acknowledgement

이 성과는 2020년도 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(NRF-2020R1A2B5B01002460)

References

  1. Do ATV, 2013, Performance and controls of gas turbine-driven combined cooling heating and power systems for economic dispatch, Irvine: University of California.
  2. Meenakshi, S., Rajambal, K., Chellamuthu, C., Elangovan, S., 2006, "Intelligent controller for a stand-alone hybrid generation system," 2006 IEEE Power India Conference.
  3. www.doosanheavy.com