Reference | Concept | Assumption |
---|---|---|
[34] | Two bus system considered, discriminant of the voltage quadratic equation ≥0. | Shunt admittance is neglected. |
[35] | Two bus system considered, discriminant of the voltage quadratic equation ≥0. | Shunt admittance is neglected. The angular separation of sending and receiving end bus voltage δ≈0. |
[36] | Same concept as above line voltage stability indices. | Line resistance & shunt admittance neglected. |
[37] | Same concept as above line voltage stability indices. | Shunt admittance is neglected. The angular separation of sending and receiving end bus voltage δ≈0. |
[38] | Limiting the maximum power transferable through a transmission line. | Shunt admittance is neglected. Power factor assumed to be constant. |
[39] | The voltage drop across equivalent Thevenin impedance = load voltage at the point of voltage collapse | Equivalent Thevenin impedance connected to sending bus is neglected. Ideal voltage source assumed at sending end bus. |
[40] | Discriminant of the voltage quadratic equation ≥0. | Shunt admittance is neglected. Voltage angle assumed to be very small. |
[41] | The largest value of difference in voltage magnitude of two buses is the correction factor β. | The voltage of the generator closest to the load bus is taken as the Thevenin voltage of the load bus. |
[42] | Based on % diversity, between moving average value, RMS of N PMU values of load bus voltage, Vi and ith sampled data | The generator voltages are held constant. |
Present work | An equivalent system of the local network is modeled with an equivalent source and impedance encompassing the effect of entire power system network external to the node under consideration | Angular separation of sending and receiving end bus voltage θqn is considered as it carries important information regarding system dynamics. Local synchrophasor data utilized. |