The need for a new constraint on voltage/reactive power studies to ensure proper voltage control
This paper shows the necessity of considering a new constraint in the studies concerning voltage control and reactive power flows. The problem addressed is that the full capacity of the reactive device may not be useful for keeping voltage controlled. An actual case is shown where voltage set point could not be maintained at the terminal bus of an existing SVC due to opposite relationship between reactive power generation and voltage magnitude. Insertion of capacitive admittance would lower the voltage. Automatic control would keep acting, thus leading to still lower voltage. Voltage collapse is a possible consequence.
voltage control reactive power flow voltage collapse power transmission