The package of torsional vibration protect based on PSCAD/EMTDC and its application in projects

Power transmission line sent with the series capacitor compensation, DC transmission, power system stabilizer of improper installation of the generator excitation system, thyristor control system, feedback electrohydraulic control system, etc., are likely to induce, lead to sub-synchronous oscillation/SSR, severe cases cause the turbine generator torsional vibration protection action. On PSCAD using its own custom modeling capabilities in Fortran development, a digital protection torsional vibration model is established and the simulation results are compared with their true means. Digital simulation show that the protection of the torsional vibration simulation results are credible. which is simulated sent Sub-synchronous resonance unit speed modal attenuation curve a multimachine with Series Compensation long-distance transmission plant is as a digital input device torsional vibration protection, protection of the torsional vibration cutting machine result is simulated, a primarg secondary the closedloop simulation analysis is formed, power plant multi-machine in different operating modes of torsional vibration protection action cases is got, the SN curve two different setting values are calculated, the power plant actual operation mode selection and the torsional vibration protection setting are provided as a reference.