DEVELOPMENT OF OPTIMISED CONTROL CONCEPT
FOR DECENTRALIZED PHOTOVOLTAIC HYBRID
ABSTRACT
Nowadays, decentralized photovoltaic hybrid systems have gained increasing ac-
ceptance on the distributed power supply market. However there are still some
drawbacks in their performance which mainly arise from conventional operation
control strategies. This paper presents an advanced control strategy of the supervi-
sory controller of the decentralized PV hybrid systems. The basic objectives of the
developed control concept are to achieve consistent technical and economical oper-
ating conditions for the system components, especially for the battery and the back-
up genset. A dispatch decision module is designed on the basis of event driven
mechanisms. Also, the constraints imposed on the components operation have been
taken into account. Simulation results illustrate that longer lifetime of the battery is
rather achieved via the developed operation control concept than via convention-
ally used ones. Continuous checking of the actual status of the system components,
especially the battery state of health and the loading ratio of the genset allow effi-
cient use of their characteristics to reduce the levelized energy cost.