State estimation and power flow analysis are important tools for analysis, operation and planning of a power system. In this paper, a new state estimation method based on the extended weighted least squares (WLS) method for considering both measurement errors and model inaccuracy is presented. Two bus, three bus, and IEEE 14 bus test cases are employed to evaluate the accuracy of the method. Th...

Traditionally, capacity and resistance have been used as the features to determine the state of health of lithium-ion batteries. In the present study, two additional features, the length of time of the constant current and the constant voltage phases of charging were used as additional indicators of state of health. To compare the appropriateness of each state of health feature, batteries were ...

The answer must be that the radiation is canceled by destructive interference between the radiation fields of the large number N of electrons that make up the steady current. A single electron in uniform circular motion emits electric dipole radiation, whose power is proportional to the square of the acceleration a = v/r, and hence to (v/c). But, the electric dipole moment vanishes for two elec...