Research Of Superconducting Magnetic Energy Storage Device For Enhancing Power System Transient Stability

In traditional centralized supplying & distributing power system, with the electrical loads and the area interchanged power increasing that fast, the inevitable long distance power transmitting will cause the safety & reliability of power system going down, thus influence the power quality. However, the development of modern society & industry demand higher and higher quality of electric power. Recent research proves that, the energy storage devices are able to reduce the area interchanged active and reactive power, thus improve the safety and reliablility of power system.How to upgrade energy storage devices' effect on improving power system stability is a hot spot in recent research field. Superconducting Magnetic Energy Storage Device (SMES) stores energy as electromagnetic power in superconducting coil, which reacts fast in case of fault or abnormity of power system with high efficiency. Compared with other energy storage devices, SMES carries the characters of larger capacity, higher effiency, less response time and it is easy to control, all of this make SMES a promising device to apply into power system. Based on the facts mentioned before, this paper takes SMES as a representative, focuses on its effect of improving power system transient stability and its installation capacity, location and control modes.The simulation work is performed on PSS/E, based on Kundur's 11 nodes power system model and Huadong power grid. The author explaines the effect of SMES improving power system's transient stability in theory and proves it through power system fault simulation. This paper performes the simulation work in aspects of installation capacity, location and control modes, analyses the active and reactive power compensation of SMES, and comparies the effect of SMES with battery energy storage device. The research work shows that SMES could improve the power system's transient stability and the installation capacity is a critical factor influencing the effect of SMES. Also, appropriate installation site and fitting control mode improves the effect of energy storage device.