Enhancement of power system performance over different time frames using advanced series compensation

Facilities provided by Advanced Series Compensation (ASC) made up of the combination of fixed capacitor banks and thyristor controlled reactors are investigated. Several aspects are examined taking advantage of the direct, continuous and fast control of transmission compensation level. The validation of the theoretical considerations is made through a digital simulation approach, which includes a power flow and a transient stability code, this last providing the chance for the user to define own models of components and regulators. A significant application is examined by modelling cascading contingencies on a power system, which likely represents the real topology of interconnection between bordering areas. The simulated events would lead to network separation if no countermeasures were adopted; the presence of an ASC is shown to be effective in order to preserve the network integrity.