Design And Application Of Harmonic Suppression Device Of 10KV Substation Based On DSP Control

In recent years,with the extensive application of a large number of nonlinear loads in the distribution network,the voltage and current waveforms in the network are distorted,resulting in the harmonic pollution of the network.It seriously affects the normal production of industrial enterprises and people's normal life.At present,the methods of harmonic treatment mainly have no source filter and active filter.Active filter has good filtering effect and is widely used in power system harmonic suppression,so as to reduce the influence of harmonics on power system safety operation and ensure the safe and stable operation of power network.In the middle and high voltage distribution network,if the active filter is used directly for harmonic suppression,the active part of the network will certainly bear the larger base wave voltage to increase its capacity and thus increase the cost.In order to reduce the capacity of Active Filter,this paper puts forward a new kind of fundamental wave Series resonance Injection Hybrid Active Power Filter SRITHAPF(Series Resonant Injection Type Hybrid Active Power Filter),by increasing the fundamental wave resonance branch and make it parallel to Active parts to reduce wave voltage,at the same time through the system of the passive Filter group of large capacity of reactive Power compensation,enable SRITHAPF system to detect and track harmonic current accurately and in real-time,The harmonic suppression and reactive power compensation are realized.On 10 kv substation harmonic suppression and reactive power compensation of engineering requirements,the paper design a resonance based on digital signal processor(DSP)injection hybrid active power filter,the filter harmonic detection algorithm,and the control strategy;it designs the hardware for filter module,the software and calculates the parameter,and establishes the simulation model of the system,the system is verified by simulation and actual engineering application test is carried out on the basis of this,the operation of the actual waveform and data are given,the results show that the system of 10 kv substation harmonic suppression and reactive power compensation have good effect,The purpose of saving energy and reducing loss has been achieved.