Paper Info
Title
A Novel Electromechanical Transient Analysis Technique of VSC-MTDC Considering DC-PCC and its Application to AC/DC Hybrid System Simulation.
Abstract
The emergence of the direct current point of common coupling (DC-PCC) brings about new difficulties to the simulation and analysis of voltage sourced converter-based multi-terminal direct current (VSC-MTDC) system. To solve this problem, this paper proposes a unified model to calculate DC-PCC voltages and DC line currents by means of quasi-admittance matrixes. The model consists of differential equations of DC-PCC injection currents and line currents and quasi-admittance matrixes are established to update the MTDC system. Thus the simulations and eigen-analysis of VSC-MTDC can be carried out by using the proposed model. On this basis, a simulation methodology of AC/DC hybrid system containing DC-PCCs is derived. Finally, the proposed method is verified in a 3-terminal 1-PCC system and a 4-terminal 2-PCC system. The simulations are consistent with the eigen-analysis results, which demonstrate the correctness and feasibility of the methodology. The analysis indicates that oscillations after faults in different systems have different dynamic performances while different DC topologies and DC-PCC numbers have little influence on system small-signal dynamics.
Year
DOI
Venue
2019
10.1109/ACCESS.2019.2909440
IEEE ACCESS
Keywords
Field
DocType
DC-PCC,quasi-admittance matrix,electromechanical transient simulation AC/DC hybrid system small-signal dynamics
Direct current,Differential equation,Oscillation,Control theory,Computer science,Correctness,Voltage,Network topology,Unified Model,Hybrid system,Distributed computing
Journal
Volume
ISSN
Citations 
7
2169-3536
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Tao Zhou100.34
Zhong Chen2317.12
Jiaqing Zhao300.34
Chunlei Xu400.34
Xianliang Teng500.34