Study On IEEE Std 1459-2010 Power Theory And Its Application

With the extensive use of nonlinear and asymmetric load, the distortion and asymmetric of the power system voltage and current are more and more obvious, which makes that the power theory in sinusoidal and symmetrical condition is more and more unsuitable for compensation capacity estimation of electrical equipments and energy measurement for the electric power department. IEEE Std 1459-2010 is a standard of power definitions under sinusoidal and nonsinusoidal, symmetrical and asymmetrical condition. In order to find the power theory which is appropriate for related power estimation in complex power environment, this paper takes IEEE Std 1459-2010 as the research object. The main contents and its rationality of IEEE Std 1459-2010 and the application in compensation capacity estimation of active power filter(APF) and energy measurement for the electric power department are studied.The main contents of IEEE Std 1459-2010 regarding single phase sinusoidal system,single phase nonsinusoidal system, three phase sinusoidal symmetrical system and three phase nonsinusoidal asymmetrical systems are elaborated. The connection and distinction between the power theory recommended by IEEE Std 1459-2010 and traditional power theory are analysed emphatically, providing a foundation for further comprehension of the power standard.The rationality of IEEE Std 1459-2010 is considered in multi-angles. The effect of apparent power and power factor calculation and apparent power decomposition in single-phase and three-phase power theory recommended in the standard and traditional power theory from the load characteristics such as reactive power, harmonic, and negative sequence is analysed quantitatively and qualitatively. That the power theory which is recommended in the standard can reflect the effect of the load characteristics effectively is verified and the defects of traditional power theory in complex power environment is verified.The consistency of the physical sense in the apparent power recommended in IEEE Std1459-2010 and traditional apparent power is analysed quantitatively. The adaptability of IEEE Std 1459-2010 which can expand to multiphase system and the development trend of future power system is evaluated, providing a good theoretical basis on power measurement,compensation equipment capacity estimation and equipment running status for the electric power department.By using the recommended theory of IEEE Std 1459-2010, the compensation capacity estimation methods of APF are analysed in single phase, three phase three wire and three phase four wire systems. The compensation capacity estimation method of single phase APF is derived by using IEEE Std 1459-2010, pointing out the unity with the traditional methods.Phase voltage of three-phase three-wire shunt APF is defined, and the traditional method of compensation capacity estimation of APF is derived under the general form of load current,and according to the related theory about the effective apparent power in IEEE Std 1459-2010,the new method of compensation capacity estimation of APF which is appropriate for sinusoidal or nonsinusoidal, symmetric or asymmetric three-phase load is derived. In the same compensation effect condition, the calculation of the given new method is smaller and is beneficial to cost saving. Finally, a new method of compensation capacity estimation of three-phase four-wire APF which is based on IEEE Std 1459-2010 is derived. The method considers the effect of the neutral line current on capacity and makes three-phase four-wire APF achieve better effect of compensation.According to the flow of power factor calculation of energy measurement, the effective power factor is used in the calculation of power fator in the electrified railway user, steel user and large residential district user. The calculation results show that the effective power factor can reflect load characteristics and neutral loss.