New VDCOL Control Strategy for Voltage Stability in Receiving-End Power Grid of DC System

Abstract:

Voltage stability of AC/DC hybrid power grid is closely related to Voltage Dependent Current Order Limiter (VDCOL). The effects of VDCOL to voltage stability along with serious voltage reduction during or after faults are analyzed in detail. Considering that VDCOL with fixed parameters is difficult to adapt the complexity of operation conditions and ac faults in the receiving-end power grid of dc system, a kind of dynamic self-adaptive VDCOL control strategy is proposed based on the voltage of ac side of converter transformers at inverter side. Simulations of Shandong power grid of China show that the new type of VDCOL is beneficial to voltage stability of receiving-end power grid.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 3256-3261
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.3256
• Online since: January 2012
• Authors: Xiao Ming Liu, Yutian Liu
• Keywords: AC/DC Hybrid Power Grid, VDCOL, Voltage Stability

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