A Synchrophasor Measurement based Approach for Dynamic Available Transfer Capability Evaluation

A Dynamic Available Transfer Capability (DATC) evaluation method using the synchrophasor measurements, considering the system's transient stability, is proposed in this paper. The proposed method attempts to reduce the computational burden of assessing the system's transient stability and DATC by reducing the time-domain simulations. For this, the Rate Of Change Of Energy (ROCOE) trajectories and Measurement Dependent Injection Distribution Factors (MDIDFs) are directly computed using the synchrophasor measurements obtained from the optimally placed Phasor Measurement Units (PMUs). The system's transient stability is assessed using the ROCOE trajectory followed by Static ATC (SATC) determination at the current operating point using MDIDFs. Then, the DATC is evaluated using time-domain simulations and the golden-bisection interpolation method. The technique is tested for different bilateral and multilateral transactions in the WSCC 9 bus and New England (NE) 39 bus systems simulated in Real-Time Digital Simulator (RTDS). The effect of change in system parameters, such as inertia and loading conditions are also studied.