Architecture Design of Digital Twin Platform for AC & DC Transmission System with Large Scale New Energy

doi:10.11985/2022.03.026

Abstract

Abstract:

With the development of power electronic devices and the progress of technology, more and more high-power power electronic devices are used in power system flexible DC transmission, in order to improve the stability of power grid and the ability to accept new energy. Chongqing Hubei flexible DC back-to-back interconnection project is a typical application of this technology. However, due to the DC link and the new energy generation process contain a large number of power electronic switching devices and power modules, it brings great difficulties to the analysis of AC-DC hybrid simulation system with large-scale new energy access. Based on the concept of digital twin, MMC sub module switch device is equivalent to its turn on and turn off resistance. According to the specific parameters and network structure of AC & DC hybrid power grid in Northeast Chongqing, considering the recent wind power planning in the region, based on the analysis and prediction of load and wind power output, a set of digital twin platform of AC & DC transmission system with large-scale wind power access is established and the platform running results are compared with the actual results, which proves the effectiveness of the analysis architecture proposed in this paper.

Key words: AC ＆ DC system, digital twin, MMC-HVDC, wind farm, architecture design

CLC Number:

TM743

ZHOU Jingsen, WEI Jinxiao, XIE Gangwen, RAN Li, ZHANG Youqiang, HU Jiayu. Architecture Design of Digital Twin Platform for AC & DC Transmission System with Large Scale New Energy[J]. Journal of Electrical Engineering, 2022, 17(3): 219-226.

Figures/Tables 19

References 16

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参数	数值
x_c	4.615 88
A	89.725 83
ω	4.154 42

参数	数值
x_c	9.712 13
A	40.496 56
ω	1.565 52

参数	数值
参数	重庆侧换流站	湖北侧换流站
正常运行电压/kV	525	525
正常持续运行电压范围/kV	500~550	500~550
额定频率/Hz	50	50
最大三相短路电流/kA	15	41.5

参数	数值
参数	重庆侧换流站	湖北侧换流站
单桥臂功率模块数	367	367
电容值/μF	8 000	8 000
启动电阻/Ω	6 000	6 000
桥臂电抗器/mH	140	140