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Title: Grid-Forming Frequency Shaping Control for Low-Inertia Power Systems

Journal Article · · IEEE Control Systems Letters
 [1];  [2];  [3];  [1]
  1. Johns Hopkins Univ., Baltimore, MD (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Skolkovo Inst. of Science and Technology, Moscow (Russia)

As power systems transit to a state of high renewable penetration, little or no presence of synchronous generators makes the prerequisite of well-regulated frequency for grid-following inverters unrealistic. As such, there is a trend to resort to grid-forming inverters which set frequency directly. We propose a novel grid-forming frequency shaping control that is able to shape the aggregate system frequency dynamics into a first-order one with the desired steady-state frequency deviation and Rate of Change of Frequency (RoCoF) after a sudden power imbalance. The no overshoot property resulting from the first-order dynamics allows the system frequency to monotonically move towards its new steady-state without experiencing frequency Nadir, which largely improves frequency security. We prove that our grid-forming frequency-shaping control renders the system internally stable under mild assumptions. The performance of the proposed control is verified via numerical simulations on a modified Icelandic Power Network test case.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)
Grant/Contract Number:
AC36-08GO28308; EPCN 1711188; AMPS 1736448; CAREER 1752362; TRIPODS 1934979
OSTI ID:
1764927
Report Number(s):
NREL/JA-5D00-79026; MainId:32943; UUID:6d818571-78f7-4858-99a1-740bccc6493e; MainAdminID:19278
Journal Information:
IEEE Control Systems Letters, Vol. 5, Issue 6; ISSN 2475-1456
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

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