Evaluation of the Performance of Back-to-Back HVDC Converter and Variable Frequency Transformer for Power Flow Control in a Weak Interconnection

This paper compares performance of a back-to-back HVDC system with series compensation external to the converter transformers, and a variable frequency transformer for power flow control feeding or supplying a weak AC network. The steady state and dynamic simulations show that both technologies are...

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Bibliographic Details
Main Authors: Bagen, B., Jacobson, D., Lane, G., Turanli, H.M.
Format: Conference Proceeding
Language:English
Subjects:
Back-to-Back HVDC System
Control systems
Frequency conversion
HVDC transmission
Hydroelectric power generation
Integrated circuit interconnections
Load flow
Load flow control
Power Flow Control
Power system interconnection
Power system planning
Power system transients
Variable Frequency Transformer
Weak Interconnection
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Description
Summary:This paper compares performance of a back-to-back HVDC system with series compensation external to the converter transformers, and a variable frequency transformer for power flow control feeding or supplying a weak AC network. The steady state and dynamic simulations show that both technologies are able to control power flow accurately. The variable frequency transformer consumes less reactive power than a back-to-back HVDC system, provides faster initial transient recovery and better natural damping capability. Back-to-back HVDC converters, however, provide smoother and faster recovery to pre-disturbance level for the same system faults. A back-to-back HVDC system also provides smoother and faster response to a controlled power change.
ISSN:1932-5517
DOI:10.1109/PES.2007.385809