Power System Inertia Monitoring Using Recursive Weighted Least Square Algorithm Under Ambient Conditions

In this paper, we identify the transfer function model relating the active power to the bus frequency using recursive weighted least square (RWLS) algorithm with ambient signals measured by the phasor measurement units (PMUs). Then, the inertia at different hierarchies, i.e. individual generator, ar...

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Bibliographic Details
Published in:IEEE Power & Energy Society General Meeting pp. 01 - 05
Main Authors: Zeng, Fanhong, Zhang, Junbo, Huang, Siwei
Format: Conference Proceeding
Language:English
Published: IEEE 26.07.2021
Subjects:
ambient signals
Generators
Mathematical models
Phasor measurement units
Power system inertia
Power systems
Real-time systems
step response
swing equation
transfer function model
Transfer functions
Weight measurement
ISSN:1944-9933
Online Access:Get full text
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Summary:In this paper, we identify the transfer function model relating the active power to the bus frequency using recursive weighted least square (RWLS) algorithm with ambient signals measured by the phasor measurement units (PMUs). Then, the inertia at different hierarchies, i.e. individual generator, area and the whole system, are estimated from unit step responses of the identified models. Compared to the conventional methods using transient signals, the proposed method can estimate the power system inertia under normal operating conditions as well as provide the tracking trajectory of inertia in real-time. The effectiveness of the proposed method is validated in the IEEE 39-bus system.
ISSN:1944-9933
DOI:10.1109/PESGM46819.2021.9638174