Research on Multi-Time-Scale Control System of DC Distribution Network

doi:10.3969/j.issn.1000－7229.2018.09.007

Abstract

Abstract: With large number of new energy access and the development of power electronic technology, DC distribution network has more advantages than AC distribution network. Meanwhile, the development of DC distribution network also demands the establishment of its control system. For the DC distribution network with new energy and energy storage, a multilevel DC voltage control system based on time scale is proposed. The control system is divided by time scale of millisecond level, second level and minute/hour level. On the basis of voltage droop control, three levels of voltage control are proposed, including the primary voltage regulation and inertial control for stabilizing voltage and damping power fluctuation, the secondary voltage regulation for eliminating the voltage difference, and the third voltage regulation for optimal operation. Finally, a four-terminal DC distribution network with PV and battery is established in Matlab/Simulink for simulation. Effectiveness of the proposed control system is verified by simulation results.

Key words: DC distribution network, multi-time-scale, control system, droop control

CLC Number:

TM 73

FAN Shixiong, LIU Xingwei, WEI Zechen, GAO Yunxing, WANG Chen. Research on Multi-Time-Scale Control System of DC Distribution Network[J]. Electric Power Construction, 2018, 39(9): 54-60.

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