Power Flow Calculation of Three-terminal DC Grid Considering Power Flow Controller

Xunyu Liu^1, , Xiaotian Xu¹, Yu Qi Pang¹ and Xinyuan Zhang¹

¹Nanjing Normal University, Nanjing, Jiangsu, China

Cite this paper:
Xunyu Liu, Xiaotian Xu, Yu Qi Pang and Xinyuan Zhang. Power Flow Calculation of Three-terminal DC Grid Considering Power Flow Controller. American Journal of Electrical and Electronic Engineering. 2020; 8(3):73-79. doi: 10.12691/ajeee-8-3-1

Abstract

In terms of large-scale integration of renewable energy into the grid, DC grid technology has obvious advantages over traditional AC grids. The good operation of a DC grid depends on effective control of power flow distribution. However, the adjustment of the bus voltage and its total power by the converter station alone cannot guarantee the control of all branches of the power grid. Therefore, it is necessary to install a DC power flow controller to achieve a reasonable distribution of line flow. This article is aimed at the multi-terminal DC grid, based on the basic power flow calculation method, considers the influence of the power flow controller on the DC grid power flow calculation and adds the influence to the calculation, changing the power equation or resistance parameters of the line, thereby realizing the power flow calculation The grid power flow calculation of the controller is realized by programming in MATLAB. The proposed calculation method can lay the foundation for the power flow optimization and stable operation of the DC grid.

Keywords:
DC grid power flow calculation optimal power flow calculation power flow controller

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

References:

[1]	Wen Jialiang, Wu Rui, Peng Chang, et al. Analysis of DC grid prospects in China[J]. Proceedings of the CSEE, 2012, 32(13): 7-12.
[2]	Li Guoqing, Bian Jing, Wang He, Yang Yang, Wang Haoxiang. Overview of DC power flow analysis and control research [J]. High Voltage Technology, 2017, 43(04): 1067-1078.
[3]	Liu Yun. Research on the Construction and Optimization of Complex DC Grid [D]. North China Electric Power University (Beijing), 2016.
[4]	Wang Yu. DC grid control method and simulation research [D]. China Electric Power Research Institute, 2013.
[5]	Meyer C, Höling M, Peterson A, et al. Control and design of DC grids for offshore wind farms[J]. IEEE Trans, on Industry Applications, 2007, 43(6): 1475-1482.
[6]	Jovcic D, Hajian M, Zhang H, et al. Power flow control in DC transmission grids using mechanical and semiconductor based DC/DC devices[C]//10th IET International Conference on AC and DC Power Transmission. 2012: 1-6
[7]	Qing Mu, Jun Liang, Yalou Li, et al. Power flow control devices in DC grids[C]//2012 IEEE Power and Energy Society General Meeting. San Diego, CA: IEEE, 2012: 1-7.
[8]	Veilleux E, Boon-TeckOoi. Multiterminal HVDC with thyristor power-flow controller[J]．IEEE Transactions on Power Delivery, 2012, 27(3): 1205-1212.
[9]	Haileselassie T M, Uhlen K. Power flow analysis of multi-terminal HVDC networks[C]//2011 IEEE Trondheim Power Tech. Trondheim, Norway: IEEE, 2011: 1-6.
[10]	Tinney W F, Hart C E. Power flow solution by Newton’s method[J]. IEEE Transactions on Power Apparatus and Systems, 1967, PAS-86(11): 1449-1460.
[11]	Wood A J, Wollenberg B F. Power generation, operation and control[M]. 2nd edition. New York NY, USA: Wiley, 1996.
[12]	Tinny W F, Hart C E. Power flow solution by Newton’s method[J]. IEEE Transactions on Power Apparatus and Systems, 1967, PAS-86(11): 1449-1460.
[13]	Qing Mu, Jun Liang, Yalou Li, et al. Power flow control devices in DC grids[C]//2012 IEEE Power and Energy Society General Meeting. San Diego, CA: IEEE, 2012: 1-7.
[14]	Xu Feng, Xu Zheng. A modular multi-level power flow controller suitable for multi-terminal DC systems[J]. Automation of Electric Power Systems, 2015, 39(03): 95-102.