| The supersynchronous resonance problem of a generator is not as well known as the subsynchronous resonance phenomena, but it may cause the same level of damage to the generator systems. Some of the supersynchronous resonance problems are due to the appearance of system unbalance at the generator terminal. The risk of this problem can be dramatically reduced if the three-phase current at the generator terminal can be maintained balanced or at least very close to balance.;This dissertation presents a feasible solution to this problem by compensating the negative sequence current at the generator terminal through a newly developed special function static var compensator. A scaled-down SVC with desired control function is implemented and installed in the Power System Simulation Laboratory at the Energy Systems Research Center (ESRC). This laboratory is a scaled-down, three-phase model power system which can simulate the steady state operation and dynamic and transient stability phenomena systems. It is an ideal facility to test, demonstrate, and verify any new design for power system monitoring, control, and protection. The control algorithm, hardware design, and some test results of this special static var compensator are also presented. |
