NDLI: Hierarchical coordination strategy for three-phase MV and LV distribution networks with high-penetration residential PV units

Content Provider	IET Digital Library
Author	Tang, Wei Cai, Yongxiang Zhang, Lu Zhang, Bo Wang, Zhaoqi Fu, Yu Xiao, Xiaobing
Abstract	This paper presents a hierarchical coordination method to improve operation conditions between the medium-voltage distribution network (MVDN) and low-voltage distribution networks (LVDN) considering high-level residential PV units integrating LV distribution networks. It addresses the following issues: (i) rapid power fluctuations and unbalance caused by high-level residential PV units passes to the MV distribution network via the point of common coupling (PCC) and thus increase operation challenges; (ii) power fluctuations, voltage violations and unbalance simultaneously happens in the LVDNs. A hierarchical coordination structure the MVDN and LVDN is proposed. In the MV level, a centralized dispatch method based on three-phase optimal power flow is developed in the timescale of minutes to minimize the power losses, unbalance and PCC adjustments, which are achieved by regulating energy storage systems (ESSs) and PV inverters in the LV level. In the LV level, a distributed control model based on a consensus algorithm is proposed in the timescale of seconds to track the reference active (or reactive) power at the PCC given by the MV level and mitigate its fluctuations. Simulations studies are performed to verify the proposed method.
Starting Page	3996
Ending Page	4006
Page Count	11
ISSN	17521416
Volume Number	14
e-ISSN	17521424
Issue Number	Issue 19, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2020.0866
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/14/19
Journal	IET Renewable Power Generation
Publisher Date	2020-12-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Centralised Dispatch Method China Control of Electric Power System Distributed Control Distributed Control Model Distribution Network Energy Storage System Hierarchical Coordination High-level Residential Photovoltaic Units High-level Residential PV Units High-penetration Residential PV Units Invertors Load Flow Low-voltage Distribution Network Low-voltage Level LVDN Medium-voltage Level Multivariable Control System MVDN PCC Photovoltaic Power System Point of Common Coupling Power Distribution Control Power Distribution Reliability Power Electronics Power Fluctuations Power Loss Power Supply Power System Control Power System Simulation PV Inverter Rapid Power Fluctuations Reactive Power Reliability Solar Power Stations Supervisory Circuit Three-phase IEEE 33 Bus Three-phase LV Distribution Network Three-phase MV Distribution Network Three-phase Optimal Power Flow Voltage Violations
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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