A Simulation Study Of Intermediate-frequency Harmonic Source In Electric Power System

When the Intermediate frequency inductive stoves are used, they can produce large amount of harmonic source which causes serious harmonic pollution of power grid. Zhejiang Province is a huge economic province where large quantities of intermediate frequency inductive stoves are used and located. Their influence on the regional power grid becomes more and more obvious, so it is necessary to give a test of the Intermediate frequency inductive stoves when they are newly installed by users. According to the specific test data, the impact caused by the user's intermediate frequency inductive stoves can be evaluated, thus providing the legal basis for the power supply department to control harmonic.This paper introduces the principle of cause, source, and damage of harmonic. The national power quality standards are also introduced in this paper. To analyze the structural principle of harmonic source such as intermediate frequency inductive stove, the intermediate frequency source can be simulated and debugged by using C++ language to do a modeling analysis of harmonic source and employing the PSCAD simulation software and MATLAB mathematical software. Finally, using the software, various kinds of experiments can be done to make a quantitative analysis and a judgment of the voltage and current's degree of aberrance of the user's harmonic equipment in actual motion. Comparing the simulation data and the specific test data, the validity of the theoretical investigation can be verified and the cause of error can be analyzed. To improve the simulation of intermediate frequency harmonic source can lay a good foundation for the follow-up harmonic monitoring and harmonic controlling.