Adaptive Reduced-Order Method of Aggregated Impedance Model for Large-Scale Photovoltaic Stations Small Signal Stability Analysis
- Resource Type
- Conference
- Authors
- Jiang, Xun; Mao, Meiqin; Chang, Liuchen
- Source
- 2022 IEEE Energy Conversion Congress and Exposition (ECCE) Energy Conversion Congress and Exposition (ECCE), 2022 IEEE. :1-8 Oct, 2022
- Subject
- Aerospace
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
General Topics for Engineers
Power, Energy and Industry Applications
Robotics and Control Systems
Transportation
Photovoltaic systems
Adaptation models
Analytical models
Computational modeling
Simulation
Process control
Mathematical models
Adaptive reduced-order method
Frequency-interval balanced model reduction theory
Impedance model aggregation
Integrated Nash-Sutcliffe model efficiency coefficient
Small-signal stability
- Language
- ISSN
- 2329-3748
Reduced-order method for aggregated impedance modeling is an effective way to simplify the small-signal stability analysis of the large-scale photovoltaic stations with hundreds of PV generators. However, it is difficult for the existing reduced-order method to achieve the best compromise between the better small-signal oscillation mode preservation and the minimum target reduction order of the impedance aggregated model. To address the problem, this paper proposes an adaptive reduced-order method for aggregated impedance model reduction, in which, the frequency-interval balanced model reduction theory is used to truncate the redundant part of the aggregated impedance model for each rolling step of the impedance aggregation. A frequency-domain error index is established to evaluate the error of the reduced-order aggregated impedance model so that the expected reduction order can be obtained adaptively. The impedance model of the large-scale photovoltaic station with 17 inverters operating under different parameters is set up in MATLAB to verify the proposed method. Simulation results show that the reduced-order aggregated impedance model obtained by the proposed method can be effectively adapted to the small-signal stability analysis of the large-scale photovoltaic stations.