Design Of Reactive Power Measurement Experiment Instrument Based On The Digital Integrator

With the development of power industry, power electronic devices increasingly widespread, the power system more and more non-linear devices, signal waveform grid distortion appeared in the case, so that the deterioration of power quality, safe operation of power systems affected. In this case, there is an existing reactive power measurement method many defects, performance measurement inaccuracies, computation capacity, poor real, instrumentation and engineering design complexity and low availability. In the non-linear signal grid dramatic increase in the current situation, how to measure the reactive power measurement has become a field of measurement of electrical problems to be solved.Research article from the reactive power theory, analyzes the existing research before reactive power measurement methods at home and abroad. Present methods for reactive power measurement problems in meeting the original premise of the principle of reactive power, use a digital integrator based approach to measuring reactive power, reactive power measurement designed experimental apparatus, including: reactive power measurement experimental instrument hardware and software design. Hardware part design of the power module, data acquisition module, STM32 control module and display module; software part of the first system algorithm design, including digital integration algorithm and digital filtering algorithm, then the algorithm program designed to achieve system on a hardware platform the program part of the design of the control module, data acquisition module, data processing module and data display modules. Finally, the article reactive power measurement methods and instruments designed experiments conducted simulation tests, the reactive power measurement simulation results, the experimental results of the simulation results of the measurement methods, experimental apparatus and other programs measurement results were compared to verify the correctness of the method.Reactive power measurement method is based on the digital integrator paper, can accurately measure the reactive power signal distortion under the originally followed the reactive power is defined. Design experiments to measure the reactive power meter is mainly used to achieve the core software programming algorithm of reactive power measurement, so reducing the impact of a number of analog components disturbed, reduce errors, make more accurate measurements. Experimental apparatus has flexible design, simple structure, easy to implement, low cost, convenient measurement, good stability and reliability, usability engineering, and other advantages.