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 > Paper

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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

2020

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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.

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