PROJECT TITLE :

Voltage Multistability and Pulse Emergency Control for Distribution System With Power Flow Reversal

ABSTRACT:

High levels of penetration of distributed generation and aggressive reactive power compensation could result in the reversal of power flows in future distribution grids. The voltage stability of those operating conditions could be very different from the additional traditional power consumption regime. This paper focuses on the demonstration of multistability phenomenon in radial distribution systems with reversed power flow where multiple stable equilibria coexist for the given set of parameters. The system could expertise transitions between totally different equilibria when being subjected to disturbances such as short-term losses of distributed generation or transient faults. Convergence to an undesirable equilibrium places the system in an emergency or in extremis state. Ancient emergency management schemes aren't capable of restoring the system if it gets entrapped in one among the low voltage equilibria. Moreover, undervoltage load shedding might have a reverse action on the system and can induce voltage collapse. We tend to propose a novel pulse emergency management strategy that restores the system to the normal state without any interruption of power delivery. The results are validated with dynamic simulations of IEEE thirteen-bus feeder performed with SystemModeler software. The dynamic models will conjointly be used for characterization of the answer branches via a completely unique approach, thus-known as the admittance homotopy power flow technique.