Torsional Modal Damping of a LCI Driven Geared Moto-Compressor Train: Evaluation, Optimization Criteria and Active Control
Abstract
The torsional modal response of geared compression trains
driven by Variable Speed Drive Systems (VSDS) can be
heavily affected by electro-mechanical interaction phenomena,
both in terms of excitation mechanism and resulting damping
contribution. A thorough understanding of these phenomena is
essential to optimize the system design of motor-compressor
shaft lines, thus avoiding equipment oversizing and
minimizing string tests and commissioning time.
This paper provides a comprehensive analysis of the key
systems and parameters affecting the torsional modal response
of a Load Commutated Inverter (LCI) driven motorcompressor,
and gives practical guidelines for system design
optimization. Besides, when the equipment inherent damping
properties are not sufficient to achieve demanding vibration
performances, an active control could be required: the real
implementation of an active damping control system acting on
the VSDS is therefore presented, showing its effectiveness on
the torsional behavior of a real string by means of experimental
results.
Simulations and field test results are herein presented,
emphasizing the importance of torsional modal response
optimization, considering mechanical aspects and mostly
analyzing electrical and control influence introduced using a
VSDS. It is worth to highlight that the type of VSDS covered
in the paper is the LCI, but the presented system design
approach is in principle applicable to any VSDS topology, with
specific electrical and control aspects to be considered for each
drive.
Description
LecturesCollections
Citation
Maragioglio, Gaspare; Daniele, Sgro; Calore, Paolo; Failla, Lorenzo; Tenca, Pierluigi (2018). Torsional Modal Damping of a LCI Driven Geared Moto-Compressor Train: Evaluation, Optimization Criteria and Active Control. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from https : / /hdl .handle .net /1969 .1 /172502.