Читать книгу Microgrid Technologies - Группа авторов - Страница 56

Due to fault on any component of the power system, voltage profile is affected; and hence power stability and quality deteriorate. The improvement in stability is not possible only by adding distributed generators (DG) in the system, but additional power flow controllers are also required to support it. With the help of FACTS controllers like GUPFC, the usable capacity of the transmission line improves and it can be flexibly loaded with larger limits depending on the system conditions. GUPFC fails to control power flow when capacitor charging power becomes unavailable due to fault. If GUPFC is present in the intentionally separated sub-system, then the charging of the capacitor is an additional load on the sub-system, which becomes sensitive due to the small power number (MW/Hz). The performance of GUPFC depends on the amount of charge on its capacitor, which depends on the connection to the energy source. It is, therefore, necessary that a generation embedded with the GUPFC system is needed.