by the appropriate standards and requirements [2–8]. The sources
of renewable energy system (RES) connected to the network may
provide continuous or discontinuous supply to the grid. To increase
the reliability and stability of the system under both steady state and
transient period, a flexible power conditioner is required [9]. The PE
topology adopts for these requirements due to its inherent fast
switching capability, bi-directional power flow control [10], optimal
energy transformation [11] and real time control characteristics of
electrical quantities [12–14]. The control architecture of power
electronic converters remains consistent and the processing ability
of such devices can be improved [15]. The strategies of effective
integration of variable renewable energy among different countries
are surveyed and cited in [16–19]. The PE requirements in various
aspects of grid integration are discussed in detail.