PUBLICATIONS
Paper
[International Journals] Yeongsu Bak and Kyo-Beum Lee, "Development of PCS to utilize differential pressure energy in district heating systems with reduced DC‑link voltage variation," Journal of Power Electronics, vol. 20, no. 4, pp. 1109–1118, Jul. 2020. -SCIE
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- 날짜 2020-03-06 07:27
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This paper proposes the development of a power conversion system (PCS) for utilizing differential pressure (DP) energy in district
heating systems with reduced DC-link voltage variation. A differential pressure control valve (DPCV) is usually used to regulate heat
transmission pressure to remote areas in district heating systems. However, a high probability of DPCV malfunction and/or failure
caused by cavitation exists because high-pressure fluids are used in district heating systems. Therefore, in this paper, a PCS for
utilizing DP energy in district heating systems by replacing the DPCV is proposed. Furthermore, PCS DC-link voltage fluctuates when
the hydraulic turbine experiences any sudden changes; and is effectively relieved by using a feed-forward control method. The PCS
effectiveness for utilizing DP energy in district heating systems with reduced DC-link voltage variation is verified by both simulation
and experimental results.
