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330 A COMPrEhENSIVE GUIdE TO SOlAr ENErGy SySTEMS
FIGURE 15.7 Phase-locked loop technology; analogous to a driver in a tunnel. Used with permission from the
National Grid.
15.8 Conclusions
This chapter highlights a number of issues that grid operators are grappling with because
of the rapid growth in PV. It doesn’t cover the challenge of accommodating this new equip-
ment in the local distribution network, which is a further topic in itself. however, all of
