Journal
IEEE TRANSACTIONS ON POWER SYSTEMS
Volume 30, Issue 6, Pages 3093-3101Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRS.2014.2384498
Keywords
High-voltage direct-current (HVDC) transmission; modular multilevel converter (MMC); synchronous generator (SG) emulation; vector control; virtual synchronous generator; voltage source converter (VSC) station; VSC-HVDC
Categories
Funding
- Key Science and Technology Program of State Grid Zhejiang Electric Power Company [5211011306Z4]
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The voltage source converter (VSC) station is playing a more important role in modern power systems, but the dynamic behavior of the VSC station is quite different from that of the synchronous generator. This paper presents the synchronous generator emulation control (SGEC) strategy for the VSC-HVDC station. The SGEC strategy is divided into the inner control loop and the outer control loop. The inner controller is developed for fast current and voltage regulations. An inertia element is introduced into the frequency-power droop to determine the command reference of the frequency, and the inertia response and the primary frequency regulation are emulated. In addition, the secondary frequency regulation can be achieved by modulating the scheduled power in the SGEC strategy. The time-domain simulation results demonstrate the VSC station with the proposed control strategy can provide desired frequency support to a low-inertia grid. Therefore, the SGEC strategy provides a simple and practical solution for the VSC station to emulate the behavior of a synchronous generator.
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