| This thesis is on-line to the higher accuracy to measured various power system parameter to carry on the study, designing can throw in the comprehensive test instrument of the power system parameter of the market, for the forcipate electric current mutual inductance with each other the Cape error margin that the feeling machine result in carried on the analysis, designing to measure phasic, measure the power factor and measure the power system frequency , measure the amount of electric voltage and measure the amount of electric current, measure the calculate way of the P, Q and carry out the electric circuit.Combine to in a transformer substation with more content of power system harmonics how applied the FFT precision to measure the basic frequency U, I to carry on the study. Moreover to three-phase the dissymmetry carried the diagraph of the cos Φ of the electric circuit to design the electric circuit, putting forward the calculate way.The This text the discussed the the principle that the the electricity the parameter measure first, the analyzing two the kinds of the methods of the on- line the diagraph of the phase angle the respectively and on- line the measure the the medium pliers the form electric the current with the each other the the error the margin of the the feeling the machine creation reason;the Discussing the the power factor the measure and the power system frequency various familiar method that rate measure;Study according to the U, I, P, Q of the exchanges sample of diagraph method combine to apply a method of the software filterr diagraph inquiry into under many environment of power system harmonics, have very strong realistic meaning.Then, the introduction to the 80C196 system design the next in order, introduced a form conversion respectively part, input the back track, host system, power supply back track, keyboard and show parts of etc.s contents.Carried on the summary and outlook to the applied and further improvement of the system of the future finally. |
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