Advanced

Performance tradeoffs of dynamically controlled grid-connected inverters in low inertia power systems

Jiang, Yan ; Pates, Richard LU and Mallada, Enrique (2018) 56th IEEE Annual Conference on Decision and Control, CDC 2017 In 56th IEEE Annual Conference on Decision and Control (CDC 2017) p.5098-5105
Abstract
Implementing frequency response using grid-connected inverters is one of the popular proposed alternatives to mitigate the dynamic degradation experienced in low inertia power systems. However, such solution faces several challenges as inverters do not intrinsically possess the natural response to power fluctuations that synchronous generators have. Thus, to synthetically generate this response, inverters need to take frequency measurements, which are usually noisy, and subsequently make changes in the output power, which are therefore delayed. This paper explores the system-wide performance tradeoffs that arise when measurement noise, delayed actions, and power disturbances are considered in the design of dynamic controllers for... (More)
Implementing frequency response using grid-connected inverters is one of the popular proposed alternatives to mitigate the dynamic degradation experienced in low inertia power systems. However, such solution faces several challenges as inverters do not intrinsically possess the natural response to power fluctuations that synchronous generators have. Thus, to synthetically generate this response, inverters need to take frequency measurements, which are usually noisy, and subsequently make changes in the output power, which are therefore delayed. This paper explores the system-wide performance tradeoffs that arise when measurement noise, delayed actions, and power disturbances are considered in the design of dynamic controllers for grid-connected inverters. Using a recently proposed dynamic droop (iDroop) control for grid-connected inverters that is inspired by classical first order lead-lag compensation, we show that the sets of parameters that result in highest noise attenuation, power disturbance mitigation, and delay robustness do not necessarily have a common intersection. In particular, lead compensation is desired in systems where power disturbances are the predominant source of degradation, while lag compensation is a better alternative when the system is dominated by delays or frequency noise. Our analysis further shows that iDroop can outperform the standard droop alternative in both joint noise and disturbance mitigation, and delay robustness. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
56th IEEE Annual Conference on Decision and Control (CDC 2017)
pages
8 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
56th IEEE Annual Conference on Decision and Control, CDC 2017
external identifiers
  • scopus:85046120275
DOI
10.1109/CDC.2017.8264414
language
English
LU publication?
yes
id
c6e92556-e96a-437d-b752-38d1b5f3145b
alternative location
https://arxiv.org/pdf/1705.00547.pdf
date added to LUP
2018-02-01 10:58:45
date last changed
2018-05-20 04:40:28
@inproceedings{c6e92556-e96a-437d-b752-38d1b5f3145b,
  abstract     = {Implementing frequency response using grid-connected inverters is one of the popular proposed alternatives to mitigate the dynamic degradation experienced in low inertia power systems. However, such solution faces several challenges as inverters do not intrinsically possess the natural response to power fluctuations that synchronous generators have. Thus, to synthetically generate this response, inverters need to take frequency measurements, which are usually noisy, and subsequently make changes in the output power, which are therefore delayed. This paper explores the system-wide performance tradeoffs that arise when measurement noise, delayed actions, and power disturbances are considered in the design of dynamic controllers for grid-connected inverters. Using a recently proposed dynamic droop (iDroop) control for grid-connected inverters that is inspired by classical first order lead-lag compensation, we show that the sets of parameters that result in highest noise attenuation, power disturbance mitigation, and delay robustness do not necessarily have a common intersection. In particular, lead compensation is desired in systems where power disturbances are the predominant source of degradation, while lag compensation is a better alternative when the system is dominated by delays or frequency noise. Our analysis further shows that iDroop can outperform the standard droop alternative in both joint noise and disturbance mitigation, and delay robustness.},
  author       = {Jiang, Yan  and Pates, Richard and Mallada, Enrique},
  booktitle    = {56th IEEE Annual Conference on Decision and Control (CDC 2017)},
  language     = {eng},
  pages        = {5098--5105},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Performance tradeoffs of dynamically controlled grid-connected inverters in low inertia power systems},
  url          = {http://dx.doi.org/10.1109/CDC.2017.8264414},
  year         = {2018},
}