Integration of Centralized and Local Voltage Control Scheme in Distribution Network to Reduce the Operation of Mechanically Switched Devices
Salish Maharjan ASHWIN M KHAMBADKONE PENG CHIH-HSIEN JIMMY
Salish Maharjan
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Abstract
Q(U) control for PV inverter has become the
mandatory local voltage controller to comply with the grid
connection code at Medium Voltage level CLC-FprTS 50549-
2. The parameters of Q(U) control is optimized day ahead for
which the tap operation is not generally taken into account.
As a result, the optimal dead-band of Q(U) controller could be
larger than the dead-band of On Load Tap Changer, which leads
to an increased number of tap operation during intermittent
irradiation day. Considering this problem, the paper proposes
the MPC based centralized controller to assist the local control
for modifying their Q(U) characteristics primarily to suppress the
number of tap operation and also participate all the inverter for
tighter voltage regulation. The proposed method is implemented
in a test distribution network modeled in DigSilent. Finally,
the effectiveness of the method is shown using RMS simulation
method.
Keywords
Centralized Voltage controller, DigSILENT, Distribution Network, Local controller, Multi-step Predictive Control, Python, Q(U) control, RMS Simulation
Source Title
Proceedings of the 2019 IEEE PES Powertech, June 23-27, 2019
Publisher
Institute of Electrical and Electronics Engineers Inc.
Series/Report No.
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Date
2019-06
DOI
10.1109/PTC.2019.8810706
Type
Conference Paper