Transmission line fault current dynamic inverter control

A transmission line fault current surge passing and impedance compensation system for dynamically bypassing fault current and transitionally balancing a phase-quadrature or reactive voltage component on the transmission line responsive to demand, said system comprising:

• compensating means coupled in series with the transmission line and being adapted to bypass fault current coupled from the transmission line and being adapted to introduce or to inject therein a phase-quadrature voltage component, ancillary to the transmission line reactive voltage component for a predetermined operating frequency;
• control means for interactively adjusting said compensating means during transitions from a normal operating mode to stabilize the magnitude and phase of a resultant phase-quadrature voltage for the injected voltage component with the transmission line reactive voltage component, substantially in phase quadrature leading or lagging phase angles with respect to transmission line voltage and current parameters, said control means sensing a fault current predetermined condition for bypassing a fault current surge, and switching said compensating means to the fault mode for so long as to pass the fault current during the fault current operating mode;
• said fault surge protected and transitionally compensated transmission line having a corresponding adjustment for the real power and reactive power components in order to provide fault current surge protection and transient and dynamic stability without incurring subsynchronous resonance for transitions from fault mode to normal mode operation.