Fault Ride-Through Criteria Development

Abstract

Wind energy integration into transmission systems has been accelerated by establishing robust grid codes relevant to the network. Fault Ride-Through (FRT) criteria is one of them, which requires generation to stay connected to transmission system under certain operational voltage envelope. Development of the criterion is a specialized task which will take into account existing grid characteristics, network history and generation response towards voltage and frequency disturbances. This chapter will outline a detailed systematic methodology for achieving FRT criteria through a set of analysis involving contingency analysis, static and dynamic scenario based system assessment. The uniqueness of this chapter is to present a case study for a grid having a high percentage of the generation through renewable energy and has HVDC connected island based transmission grid. Each island sub-system separated by HVDC link is pre-dominant with non-uniform distribution of generation units and load centres. Therefore, two different FRT criteria are found to be effective for this power systems network. None of the reported criteria in prevailing networks have introduced similar approach before. New Zealand power system has similar characteristics and has been utilized for this case study. FRT criteria development has been in practice but the current context has not been published in articles or books and hence the motivation for this book chapter.