TY - GEN
T1 - Control of Neutral-Point-Clamped converter in distributed power generation to fulfil Low Voltage Ride-Through requirements
AU - Alepuz, S.
AU - Busquets, S.
AU - Bordonau, J.
AU - Pontt, Jorge
AU - Silva, César
AU - Rodríguez, José
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2007
Y1 - 2007
N2 - Grid connection requirements established by power system operators have been updated in recent years, in order to include distributed power generation plants operation in the transient operation control of the overall electric power system. Among them, Low Voltage Ride-Through requirements demand wind power plant to remain connected to the network in presence of grid voltage dips. It is well-known that grid voltages present positive, negative and zero sequence components under faulty condition, hence regulators based on symmetrical components are well suited to control grid-connected converters. In this work, a Neutral-Point-Clamped topology has been considered as an active front end of a distributed power generation system. In order to achieve balanced grid currents under any grid condition, negative-sequence grid voltage is feedforwarded, working, concurrently with the Linear Quadratic Regulator current controller. An outer loop for dc-link voltage control is implemented using a proportional-integral regulator. Power flow mismatch during grid fault condition causes dc-link voltage ] increase, therefore generator-side regulation is needed to avoid improper dc bus voltage evolution.
AB - Grid connection requirements established by power system operators have been updated in recent years, in order to include distributed power generation plants operation in the transient operation control of the overall electric power system. Among them, Low Voltage Ride-Through requirements demand wind power plant to remain connected to the network in presence of grid voltage dips. It is well-known that grid voltages present positive, negative and zero sequence components under faulty condition, hence regulators based on symmetrical components are well suited to control grid-connected converters. In this work, a Neutral-Point-Clamped topology has been considered as an active front end of a distributed power generation system. In order to achieve balanced grid currents under any grid condition, negative-sequence grid voltage is feedforwarded, working, concurrently with the Linear Quadratic Regulator current controller. An outer loop for dc-link voltage control is implemented using a proportional-integral regulator. Power flow mismatch during grid fault condition causes dc-link voltage ] increase, therefore generator-side regulation is needed to avoid improper dc bus voltage evolution.
UR - http://www.scopus.com/inward/record.url?scp=48349137402&partnerID=8YFLogxK
U2 - 10.1109/PESC.2007.4342372
DO - 10.1109/PESC.2007.4342372
M3 - Conference contribution
AN - SCOPUS:48349137402
SN - 1424406552
SN - 9781424406555
T3 - PESC Record - IEEE Annual Power Electronics Specialists Conference
SP - 2322
EP - 2327
BT - PESC 07 - IEEE 38th Annual Power Electronics Specialists Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - PESC 07 - IEEE 38th Annual Power Electronics Specialists Conference
Y2 - 17 June 2007 through 21 June 2007
ER -