A New Method for Determination of Harmonic Responsibility Based on Quality Engineering Theory

Abstract

At present, the essence of traditional methods for determination of harmonic responsibility among different parts in power system is mainly based on the contribution of relevant physical quantity on the point of common coupling (PCC) of both utility side and customer side. However, theoretical basis of various methods is of much difference, leading to a large difference in the final calculation result of harmonic responsibility. Therefore, there is no reliable approach applied in actual cases. This project aims to fill the current gap in literature, proposing a new method to determine harmonic responsibility from the perspective of economic loss. Firstly, according to power theory of IEEE Std.1459-2010 and quality engineering theory, the index set of harmonic pollution evaluation on PCC is established, and the expressions of calculation of economic loss are obtained. Secondly, collecting relevant data on PCC, the parameters of Norton equivalent models of utility side and customer side are obtained by the reference impedance method, then contributions of corresponding physical quantity on PCC can be analyzed. Based on relevant expressions of economic loss, calculation results of economic loss are all obtained. At the same time, values of harmonic responsibility of utility side and customer side are calculated. Finally, new adjustment scheme of rewarding-penalizing electricity charge (RPEC) is discussed and compared with other traditional schemes. After comparison, Results of comparative analysis show that the new adjustment scheme can not only increase the penalty for harmonics but also reflect commodity characteristic of electricity energy. In this manner, calculation result of electricity charge is more reasonable. Hence, electricity environment on PCC can be improved.

Research and calculation of the levels of higher harmonics of rotary electric machines in active-adaptive networks

“…The method of calculating the energy level of higher harmonics in the form of the sum of the squares of the electromotive force of the groove harmonics, taken when each of the three phases of the stator winding is turned off in sequence, is based on the determination of the dependence of magnetic losses from the groove harmonics of the magnetic field in the air gap on the degree of electromagnetic asymmetry [29,30].…”

Imposing fair penalty to the harmonic sources based on the measurement data

“…Up to now, various methods have been proposed, to determine the amount of the penalty. Some of these methods are based on the estimation of the cost of harmonic damages to penalize harmonic sources [1,14,[18][19][20]. Another set of methods seeks pricing through the determination of the HCC [8,21], which have better computability and are more reasonable for the HSs compared to the first group methods.…”

“…Due to the widespread use of non-linear loads, the use of real-time methods in data analysis has become very important for analysing the harmonic voltage data to real-time monitor and control the system [10,11]. For many countries, subscribers with low power factors are charged [12], so non-linear loads can receive a penalty determined according to their contribution to the harmonic voltage [13,14] or other indices such as harmonic adjusted power factor or service quality index [15]. The harmonic sources have to pay the penalty until the appropriate compensator is installed on their internal networks.…”