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Distributed Frequency Divider for Power System Bus Frequency Online Estimation Considering Virtual Inertia From DFIGs

Journal Article · · IEEE Journal on Emerging and Selected Topics in Circuits and Systems
In this work, a distributed frequency divider is proposed to estimate power system bus frequency with a limited number of PMUs while considering the inertial contributions from double-fed induction generators (DFIGs). The key idea is to reformulate the original frequency divider by modeling the contributions of DFIGs with inertia emulation and external regional power system through Thevenin equivalents. The distributed frequency divider is general and able to estimate local bus frequencies in a distributed manner. Besides, only the knowledge of the rotor speeds of synchronous generator, boundary bus frequencies and terminal bus frequencies of DFIGs as well as the admittance matrix are required to estimate the frequencies at all buses. This is drastically different from existing approaches that require system observability by PMUs to monitor all bus frequencies. Numerical results carried out on the IEEE 39-bus and modified 118-bus power systems with DFIGs demonstrate and effectiveness and robustness of the proposed method.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
Grant/Contract Number:
AC36-08GO28308; AC52-07NA27344
OSTI ID:
1843374
Alternate ID(s):
OSTI ID: 1871788
Report Number(s):
LLNL-JRNL-835139; NREL/JA-5D00-82004; MainId:82777; UUID:c8fe8602-999e-4606-9d24-077754499bd2; MainAdminID:63774
Journal Information:
IEEE Journal on Emerging and Selected Topics in Circuits and Systems, Journal Name: IEEE Journal on Emerging and Selected Topics in Circuits and Systems Journal Issue: 1 Vol. 12; ISSN 2156-3357
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

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