Abstract˖
Supervisory Control and Data Acquisition (SCADA)
Systems are used in photovoltaic (PV) power plants for monitoring,
control, remote communication purposes. The ingredient of SCADA
system in PV power plants is introduced in this paper. In order to
improve security and reliability of the SCADA system in PV plants,
this paper provides two effective solutions, security access control
strategy and redundancy mechanism. The proposed security access
control strategy adopts some measures, such as security authentication
data encryption, as well as role-based access control. These measures
can solve communication security issues between the SCADA system
remote terminal units (RTU) and SCADA configuration server.
Furthermore, Device and network redundancy is presented in the
SCADA system. And redundancy switching mechanism has been
implemented through four redundancy services. The availability of the
SCADA system can be validated through SCADA configuration
server.
Index Terms: Supervisory Control and Data Acquisition ˄SCADA˅
Photovoltaic (PV) Remote terminal units (RTU) Security
certification Redundancy
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