Complementary Power Control of the Bipolar-type Low Voltage DC Distribution System

DOI QR코드

DOI QR Code

Byeon, Gilsung;Hwang, Chul-Sang;Jeon, Jin-Hong;Kim, Seul-Ki;Kim, Jong-Yul;Kim, Kisuk;Ko, Bokyung;Kim, Eung-Sang

  • 투고 : 2014.10.07
  • 심사 : 2014.11.17
  • 발행 : 2015.05.01

초록

In this paper, a new power control strategy for the bipolar-type low voltage direct current (LVDC) distribution system is being proposed. The dc distribution system is considered as an innovative system according to the increase of dc loads and dc output type distribution energy resources (DERs) such as photovoltaic (PV) systems and energy storage systems (ESS). Since the dc distribution system has many advantages such as feasible connection of DERs, reduction of conversion losses between dc output sources and loads, no reactive power issues, it is very suitable solution for new type buildings and residences interfaced with DERs and ESSs. In the bipolar-type, if it has each grid-interfaced converter, both sides (upper, lower-side) can be operated individually or collectively. A complementary power control strategy using two ESSs in both sides for effective and reliable operation is proposed in this paper. Detailed power control methods of the host controller and local controllers are described. To verify the performances of the proposed control strategy, simulation analysis using PSCAD/EMTDC is being performed where the results show that the proposed strategy provides efficient operations and can be applied to the bipolar-type dc distribution system.

키워드

DC distribution system;DC microgrid;DC power control;Energy storage system;Bipolar type;PSCAD/EMTDC

참고문헌

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피인용 문헌

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