Under complicated field conditions, electrical measurement error of measuring instruments has become a problem, such as containing multiple harmonic occasions and in power factor is small, the electrical measurement instruments beyond the original calibration error, and the market is lack of a comprehensive test platform, which can fully simulate the scene with all kinds of environment, but also a platform for the accurate measurement of all kinds of environment, the design of this project is using hardware and software to complete the above function.
Two, the function and principle
This platform may include three parts: 1, the site environment simulation test station. 2, precise measuring part (applied to electric energy acquisition server table laboratory). Riot test box 3, temperature adjustable.
The scene of the complex from three factors: 1, the angle between current and voltage (angle). 2, harmonic (frequency domain). Harmonic components of different. 3, the time (Shi Yu). The angle between current and voltage of different performance at different time harmonic wave components. This period (the first step) designed by a 50HZ standard source, the external adjustable impedance method to realize the angle domain changes, and by measuring the precision measurement part, so as to get the error between actual energy and measuring instruments. The second step to achieve frequency change, signal generator, power design and manufacture integrated frequency, so as to simulate the scene changes in frequency domain. The third step to realize the design and manufacture of the recorder, and then data connection and test bench, wave field completely as like as two peas and reproduction, so as to simulate and test on the site environment more complex.
Accurate measurement of parts: the use of high speed and high precision AD, collected the field current and voltage wave, real-time computing, which are to be measured in the window design in advance of time domain and frequency domain of the value of the apparent power, active power, no power value and are not counted in the frequency domain and time domain window measurements to the value of the apparent power so you can accurately test error, by measuring apparatus. In order to increase measurement calibration apparatus for measuring the error in the complex field environment of domestic blank.
Riot test box: Riot test box design a temperature adjustable, and the installation of cameras and the temperature and humidity sensors, temperature adjustable, as is observed the influence of temperature on measuring apparatus. The riot is a destructive test is to gauge to limit condition.
