Abstract
We propose a framework to engineer synthetic-inertia and droop-control parameters for distributed energy resources (DERs) so that the system frequency in a network composed of DERs and synchronous generators conforms to prescribed transient and steady-state performance specifications. Our approach is grounded in a second-order lumped-parameter model that captures the dynamics of synchronous generators and frequency-responsive DERs endowed with inertial and droop control. A key feature of this reduced-order model is that its parameters can be related to those of the originating higher-order dynamical model. This allows one to systematically design the DER inertial and droop-control coefficients leveraging classical frequency-domain response characteristics of second-order systems. Time-domain simulations validate the accuracy of the model-reduction method and demonstrate how DER controllers can be designed to meet steady-state-regulation and transient-performance specifications.
Original language | American English |
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Number of pages | 9 |
State | Published - 2017 |
Event | 2017 IEEE 56th IEEE Conference on Decision and Control - Melbourne, Australia Duration: 12 Dec 2017 → 15 Dec 2017 |
Conference
Conference | 2017 IEEE 56th IEEE Conference on Decision and Control |
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City | Melbourne, Australia |
Period | 12/12/17 → 15/12/17 |
Bibliographical note
See NREL/CP-5D00-71536 for paper as published in IEEE proceedingsNREL Publication Number
- NREL/CP-5D00-68165
Keywords
- DER
- distributed energy resources
- inertial frequency response
- primary-frequency response