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.
Highlights
In recent years, a large number of power electronic devices are put into power system, harmonics have become more and more serious
On the basis of realizing the close relationship between economy and harmonic responsibility, this paper firstly proposes a new method to calculate harmonic responsibility from perspective of economic loss, which prominently reflects the essence of electricity energy is commodity
It has following advantages: 1) The new method can evaluate harmonic responsibility comprehensively under different harmonic frequencies, and compared with comprehensive calculation of harmonic responsibility based on combination weighting method, it is easier to get applied in reality problems
Summary
A large number of power electronic devices are put into power system, harmonics have become more and more serious. In the literature [9], Professor Wilson firstly proposes the method for quantitative determination of harmonic voltage responsibility and harmonic current responsibility based on superposition projection principle. On the basis of realizing the close relationship between economy and harmonic responsibility, this paper firstly proposes a new method to calculate harmonic responsibility from perspective of economic loss, which prominently reflects the essence of electricity energy is commodity. A new adjustment scheme of electricity charge is compared with traditional schemes, comparative result shows that new scheme is more reasonable It enriches research achievement in the fields of energy metering and determination of harmonic responsibility of power quality
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