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Implementation of intrusion detection methods for distributed photovoltaic inverters at the grid-edge

2020 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 2020

Jones, C.B.; Chavez, Adrian R.; Darbali-Zamora, Rachid; Hossain-McKenzie, Shamina S.

Reducing the risk of cyber-attacks that affect the confidentiality, integrity, and availability of distributed Photovoltaic (PV) inverters requires the implementation of an Intrusion Detection System (IDS) at the grid-edge. Often, IDSs use signature or behavior-based analytics to identify potentially harmful anomalies. In this work, the two approaches are deployed and tested on a small, single-board computer; the computer is setup to monitor and detect malevolent traffic in-between an aggregator and a single PV inverter. The Snort, signature-based, analysis tool detected three of the five attack scenarios. The behavior-based analysis, which used an Adaptive Resonance Theory Artificial Neural Network, successfully identified four out of the five attacks. Each of the approaches ran on the single-board computer and decreased the chances of an undetected breach in the PV inverters control system.

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TYPE Conference Poster YEAR 2020
ScopusOSTIDOI

Distribution Feeder Fault Comparison Utilizing a Real-Time Power Hardware-in-the-Loop Approach for Photovoltaic System Applications

Conference Record of the IEEE Photovoltaic Specialists Conference

Darbali-Zamora, Rachid; Hernandez Alvidrez, Javier H.; Summers, Adam; Gurule, Nicholas S.; Reno, Matthew J.; Johnson, Jay B.

Power outages are a challenge that utility companies must face, with the potential to affect millions of customers and cost billions in damage. For this reason, there is a need for developing approaches that help understand the effects of fault conditions on the power grid. In distribution circuits with high renewable penetrations, the fault currents from DER equipment can impact coordinated protection scheme implementations so it is critical to accurately analyze fault contributions from DER systems. To do this, MATLAB/Simulink/RT-Labs was used to simulate the reduced-order distribution system and three different faults are applied at three different bus locations in the distribution system. The use of Real-Time (RT) Power Hardware-in-the-Loop (PHIL) simulations was also used to further improve the fidelity of the model. A comparison between OpenDSS simulation results and the Opal-RT experimental fault currents was conducted to determine the steady-state and dynamic accuracy of each method as well as the response of using simulated and hardware PV inverters. It was found that all methods were closely correlated in steady-state, but the transient response of the inverter was difficult to capture with a PV model and the physical device behavior could not be represented completely without incorporating it through PHIL.

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TYPE Conference Poster YEAR 2019
ScopusOSTIDOI
Results 26–36 of 36
Results 26–36 of 36