Damping of Subsynchronous Control Interactions in Large-Scale PV Installations Through Faster-Than-Real-Time Dynamic Emulation

Large-scale photovoltaic (PV) power plant has witnessed a dramatic increase in the integration into transmission and distribution network, manifesting subsynchronous control interaction (SSCI) when the host grid is weak. In this work, the oscillation modes of a typical PV network are analyzed, and a...

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Bibliographic Details
Published inIEEE access Vol. 9; pp. 128481 - 128493
Main Authors Cao, Shiqi, Lin, Ning, Dinavahi, Venkata
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
AC/DC grid
Active control
Active-reactive power
Converters
Damping
dynamic simulation
Dynamic stability
electromagnetic transient
Emulation
faster-than-real-time
Field programmable gate arrays
Hardware
hardware emulation
Inverters
Oscillation modes
Oscillators
parallel processing
Photovoltaic cells
Power control
Power plants
Power system stability
predictive control
PV generation
Real time
Simulation
Transient stability
Voltage control
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Summary:Large-scale photovoltaic (PV) power plant has witnessed a dramatic increase in the integration into transmission and distribution network, manifesting subsynchronous control interaction (SSCI) when the host grid is weak. In this work, the oscillation modes of a typical PV network are analyzed, and a faster-than-real-time (FTRT) emulation is proposed for predicting the SSCI and consequently mitigating its impacts on AC grid by taking the effective active/reactive power control action. The electromagnetic transient (EMT) simulation is utilized to model the PV panels and converter stations to reflect the actual dynamic process. Meanwhile, the AC grid undergoes transient stability (TS) simulation to obtain a high speed up over real-time, and consequently, a power-voltage interface is adopted for the coexistence of different simulation methods. The reconfigurability and parallelism of the field-programmable gate arrays (FPGAs) enable the EMT-TS co-emulation strategy to run concurrently. With a remarkable 122 FTRT ratio, the proposed hardware emulation can provide an effective solution before the SSCI causes serious disruption following its detection. The hardware emulation results are validated by the off-line simulation tool Matlab/Simulink ® and TSAT ® in the DSATools ™ suite.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2021.3112921