Modeling, Control, and Operation of an M-DAB DC-DC Converter for Interconnection of HVDC Grids

Future high-voltage direct-current (HVDC) networks based on voltage source converters (VSCs) will have different structures (asymmetric monopolar, bipolar, or symmetric monopolar), voltage levels, control, and protection schemes. Therefore, dc-dc converters are needed to interconnect those VSC-HVDC...

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Bibliographic Details
Published in:IEEE systems journal 2023-06, Vol.17 (2), p.1-12
Main Authors: Yazdi, Seyed Saeid Heidari, Rouzbehi, Kumars, Carrizosa, Miguel Jimenez, Heidary, Amir, Bagheri, Mehdi
Format: Article
Language:English
Subjects:
Control systems
Control theory
Controllers
DC–DC converter
Dynamic stability
Electric bridges
Electric converters
Energy management
HVDC grids interconnection
HVDC transmission
Liapunov functions
modular dual active bridge (M-DAB) converter
Modulation
MT-HVDC grids
Nonlinear control
Power flow
Stability analysis
Switches
Topology
Transformers
Voltage control
Voltage converters (DC to DC)
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Summary:Future high-voltage direct-current (HVDC) networks based on voltage source converters (VSCs) will have different structures (asymmetric monopolar, bipolar, or symmetric monopolar), voltage levels, control, and protection schemes. Therefore, dc-dc converters are needed to interconnect those VSC-HVDC grids and several technical issues on their control and operational systems must be adequately addressed. A dc-dc converter based on a modular-dual active bridge (M-DAB) converter is suggested to reach a desirable interconnection of the HVDC grids and regulate power flow (PF) between them. A dynamic averaged model is proposed for the M-DAB converter and its stability is analyzed using the Lyapunov function. Moreover, a new local controller based on nonlinear control theory is proposed for the M-DAB. The new M-DAB local controller is integrated with the energy management system (EMS), by updating the PF equations, to create a complete control structure. Considering the CIGRE DCS3 HVDC test system and the studied M-DAB, static, dynamic simulation, and experimental studies are conducted and the dc-dc converter and the performance of the designed controllers and the EMS are examined and validated.
ISSN:1932-8184
1937-9234
DOI:10.1109/JSYST.2023.3235249