Mitigation of Subsynchronous Resonance with Thyristor Controlled Series Compensation in the Great Britain Power Network

Abstract

In this thesis, the use of thyristor controlled series compensation are studied as a tool to mitigate resonance between the mechanical and electrical part of a series compensated Great Britain power network. A literature study on the field is performed, and simulation tools are used to test cases in the network. The network is modeled, simulations run and results analyzed.

The results from simulations have proved that with fixed compensation there is a limited amount of power that can be transferred, and that mitigation of resonance is needed. It is shown that the TCSC indeed mitigates the resonance, making it possible to increase compensation and hence power transfer to a higher level. It is noted that the variable compensation device also contributes to a more stable system in other ways than mitigating of resonance.