A Terminal Voltage Estimation and Unbalance Compensation Strategy Based on Double Synchronous Reference Frame for Shore Power Supply

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Cheng, Qian^1 ; Mou, Xiaochun^1

NARI Group Corporation, State Grid Electric Power Research Institute, Nanjing

211000, China^1

关键词: Double synchronous reference frame;    Measured currents;    Negative sequence;    Robust methods;    Sequence components;    Terminal voltages;    Unbalance compensation;    Voltage compensation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/3/032014/pdf
DOI  :  10.1088/1757-899X/452/3/032014

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, a strategy of terminal voltage estimation unbalance compensation for shore power supply is proposed. In this strategy, based on double synchronous reference frame, sequence components are extracted from the measured current and voltage fast and precisely. And then, the terminal voltage could be accurately estimated under the equivalent circuit in the form of vector. At last, a simple and robust method is applied for voltage compensation, from which independent adjustability on the magnitude and the phase of both positive and negative sequence of terminal voltage can be achieved. The proposed strategy is simulated in PSCAD. The simulation results show that, by this strategy, the terminal voltage can be rapidly compensated to be fully balanced and adjusted to the demanded phase within 15ms.