Shunt connected superconducting energy stabilizing system

An energy stabilizing system for stabilizing the supply of power from an AC electrical power system to a load in response to a power disturbance on said AC electrical power system, said energy stabilizing system comprising:

• energy system means for converting AC power from said AC electrical power system to DC power for storage in a superconducting energy storage device and for releasing said DC power from said superconducting energy storage device in response to said power disturbance, said energy system means having input lines connected to receive said AC power from said AC electrical power system and output lines for supplying said DC power, said energy system means including control means for generating at least one power generation control signal and at least one isolation control signal, said control means having at least two modes of operation, said isolation control signal proceeding to an inactive state upon the occurrence of said power disturbance when said control means is in said first mode, said isolation control signal proceeding to an active state upon the occurrence of said power disturbance when said control means is in said second mode;
• a real power/reactive power means for generating an AC electrical power signal from said DC power on said output lines of said energy system means in response to said at least one power generation control signal, said real power/reactive power means having input lines receiving said DC power from said output lines of said energy system means and further having output lines connected to supply said AC electrical power signal to said load to reduce any effect of said power disturbance on said load;
• a gated bidirectional semiconductor switch connected as an isolation switch between said AC electrical power system and said load and in a circuit branch that is parallel with said energy system means and said real power/reactive power means, said gated bidirectional semiconductor switch being responsive to said at least one isolation control signal to through-connect AC power from said AC electrical power system to said load when said at least one isolation signal is in said active state and to isolate said AC electrical power system from said load when said at least one isolation control signal is in said inactive state.

An energy stabilizing system for stabilizing the supply of power from a three phase AC electrical power system to a load in response to a power disturbance on said three phase AC electrical power system, said energy stabilizing system comprising:

• energy system means for converting AC power received from said three phase AC electrical power system into DC power for storage in a superconducting energy storage device and for releasing said DC power from said superconducting energy storage device in response said power disturbance, said energy system means having input lines connected to receive said AC power from said three phase AC electrical power system and output lines for supplying said DC power, said energy system means including control means for generating at least one power generation control signal and a plurality of isolation control signals;
• a real power/reactive power means for generating three phase AC electrical power signals from said DC power received from said output lines of said energy system means in response to said at least one power generation control signal, said real power/reactive power means having input lines receiving said DC power from said output lines of said energy system means and further having output lines connected to supply said three phase AC electrical power signals to said load to reduce any effect of said power disturbance on said load;
• a plurality of gated bidirectional semiconductor switches each respectively connected as an isolation switch between a respective phase of said three phase AC electrical power system and said load and in a circuit branch that is parallel with said energy system means and said real power/reactive power means, each of said gated bidirectional semiconductor switches being responsive to at least one of said plurality of isolation control signals to either through-connect the respective phase of said three phase AC power system to said load or to isolate the respective phase of said three phase AC power system from said load, said plurality of isolation control signals causing said plurality of gated bidirectional semiconductor switches to through-connect AC power from said AC electrical power system to said load during normal operation of said AC electrical power system and further being operational in either first or second modes upon the occurrence of a power disturbance, said plurality of isolation control signals causing said plurality of gated bidirectional semiconductor switches to isolate said AC electrical power system from said load upon the occurrence of said power disturbance in said first mode, and causing said plurality of gated bidirectional semiconductor switches to through-connect AC power from said energy system means and said real power/reactive power means to both said load and said AC power system in said second mode.