TCSC (Thyristor Controlled Series Compensation) are FACTS devices which contribute substantially to
the improvement of the dynamic stability of power systems. The series compensation technology uses TCR (Thyristor Controlled Reactor), very similar to the classical shunt compensation by means of an SVC.
However, the TCSC´s control can only be applied effectively if the TCSC scheme and its rating as well as the control and protection circuits are well matched to the specific network parameters and the specification requirements. Hence, design verification by real-time simulation is imperative to successful TCSC operational performance. In this paper, the use of a new fully digital RTDS TM (Real Time Digital Simulator) model for the dynamic testing of TCSC control and protection functions is presented. RTDS uses fast DSP (digital signal processors) technology with standard models on TPC (NEC Tandem processor card) in combination with the new 3PC (SHARC 3 processor cards) for advanced modelling requirements like the fully digital TCSC. This TCSC model has been developed and verified for the Serra da Mesa project in Brazil. It is suitable for combining with physical plant control and protection equipment. In the development of the TCSC model, special attention was given to the specific requirements for testing the latest developments of the series compensation including the hybrid optical current measuring techniques. These measurements are likely to revolutionise the design of the protection schemes for TCSC. Highlights of the control and protection tests for the scheme hard - and software equipment in the simulator are presented and compared with site-recordings.
D. Retzmann, K. Bergmann, M. Claus, G. Kuhn, A. Kumar, X. Lei, I. Baran, P. Forsyth T. Maguire, In Proc. CEPSI 2000, Manila Philippines, October 2000
KEYWORDS: Enhanced fully digital real-time simulation, TCSC, system stability, advanced control and protection