Affiliations: [a] State Key Laboratory of Transmission and Distribution
Equipment and System Security and New Technology, School of Electrical
Engineering, Chongqing University, Chongqing, China | [b] Shandong Zibo Power Supply Bureau, Zibo, Shandong, China
Correspondence:
[*]
Corresponding author: Fan Yang, State Key Laboratory of
Transmission and Distribution Equipment and System Security and New Technology,
School of Electrical Engineering, Chongqing University, Chongqing 400030,
China. Tel.: +86 1399 6289 198; E-mail: yangfancqu@gmail.com
Abstract: The electromagnetic transient can be used to analyze the stability
of power systems. In the paper, the electromagnetic transient of an AC-DC
interconnected system under different faults is investigated, and interaction
between the AC system and DC system is analyzed. Firstly electromagnetic
transient models for the components in a high voltage direct current (HVDC)
transmission system are presented, including model for converter transformer,
harmonic filters, transmission line and control system. Then simulation based
on electromagnetic transient model for a ± 800 kV bipolar
HVDC-AC interconnected system is carried out, and both the steady state and
step response performance are checked to verify the accuracy of the model.
Finally electromagnetic transient of the system under different faults is
investigated, including different grounding faults on AC side, fault on DC side
and fault of filters. Transient responses are analyzed, including the
recovering time from oscillation caused by faults and possibility of
commutation failure (CF).
