Study Of Harmonic Compensation Device Based On A Combination Of Tcr And Tsf

There are lots of non-linear loads in distribution power grid with the rapid expansion of our Chinese national economy.They have the electric characteristie of low power factor. When been working,they bring much power quality problems such as low power factor,runn-ing a large amount of harmonic current injection network,voltage fluctuations flicker and three phase unbalance,reducing the quality of power supply,affecting other users of system.In this paper,affection of harmonic and reactive power has been analyzed at first,and then the relevant theories of reactive power compensation and harmonic suppression the development of reactive power compensation devices have been introduced.TCR and TSF and their principles and characteristics have been analyzed. This paper analyzes the working principle and control method of TCR-TSF filter device based on the TCR and TSF.The dq coordinate transformation method to detect the system voltage, current, active power, reactive power and compensation for the calculation of admittance based on instantaneous reactive power theory synchronous hae detailed analyzed, the switching strategy of TSF and the method of TCR control angle calculation and TCR control scheme have been analyzed. A control system of TCR-TSF based TMS320F2812 has been designed.On the hardware side,signal acquisition circuit, synchronous detection circuit,AD sampling circuit and peripheral circuit of DSP have been designed and debugged,the circuit of TCR pulse transmission and TSF zero trigger has also been designed. On the software side, the controller's sampling, calculation and trigger the preparation of such program modules have been designed.Finally, the simulation model of TCR-TSF filter device based Simulink of MATLAB's toolbox has been established.Test of TCR and TSF has beed completed respectively. The result show that a TCR-TSF filter device has excellent behavior to restrain harmonic and compensate reactive power and good performance of dynamic response, also verifies the effectiveness and validity of control strategy and realize the functions anticipated.