Secure Power Distribution Against Reactive Power Control Malfunction in DER Units

Penetration of distributed energy resources (DERs) such as wind, solar and battery units are rapidly increasing in distribution power system (DPS). In view of power grid reliability and efficiency, cyber and physical secure of these units are highly important since it can directly impact power syste...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2021-06, Vol.36 (3), p.1552-1561
Main Authors: Joseph, Anto, Smedley, Keyue, Mehraeen, Shahab
Format: Article
Language:English
Subjects:
Cybersecurity
Delay effects
distributed energy resources
Distributed generation
dynamic var compensation units
Electric power distribution
Electric power grids
Energy sources
Power control
Power grids
Power system dynamics
Power system stability
Reactive power
Reactive power control
Security
Switching
Voltage control
Voltage regulators
voltage stability
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Summary:Penetration of distributed energy resources (DERs) such as wind, solar and battery units are rapidly increasing in distribution power system (DPS). In view of power grid reliability and efficiency, cyber and physical secure of these units are highly important since it can directly impact power system operations. This paper investigates the dynamic behavior of power distribution during cyber, physical and natural strikes on reactive power control in DER units. Various fault scenarios including modifications in voltage-reactive power (Volt-Var) curve pattern such as slope of the curve, dead band; and changes in capacitive or/and inductive reactive power delivery to the power grid are presented. Further, fault scenarios are investigated with the presence of dynamic VAR (volt-ampere reactive) compensation (DVC) units in the system. A southern California 140-bus commercial distribution power system is selected as a test system and faults are analyzed in both Matlab/Simulink and ETAP simulation platforms. The results evidence that the modifications in reactive power control values at DER units significantly affects the voltage quality/security of the system and affect the number of switching actions of voltage regulators (VRs). In contrast, DPS connected with DVCs improves voltage quality and reduces the number of switching actions of VRs, also voltage quality/security is maintained during the faults.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2020.3011376