Discussion of harmonic limits evaluation

The nominal voltage for gb provisions of 110 kv and below allowable value and utility grid harmonics test method, it is our country in the utility grid restrictions in the harmonic distortion and distinguish system harmonic responsibility basis. But this is standard for all the general standard utility grid, and the distribution system of intelligent building office building has its own characteristics in the concrete application of the standard, will be confronted with some difficulties. This paper analyses the commercial office building in intelligent building, the characteristics of distribution system, discuss the application methods, finally gb realize harmonic limits requirement analysis, and points out that the required conditions of harmonic limits distribution system standards need power supply concerted cooperation and efforts.