摘要
Abstract
In routine testing of load-box, the error often appears instability which related to the principle of detection. At present, the measuring principle of load-box is "Impedance detection" or "Admittance test" which is greatly affected by the quality of power grid (such as upper harmonics, frequency and other factors). As this point, the error of load-box often appears in unstable phenomenon especially in low impedance. Therefore, this paper designs a device to calibration load-box that based on the theory of Maxwell Bridge, and provides a method by detecting the components (such as resistance and inductance) in the load-box which can not only avoid the effect that comes from the grid, but also can offer a basis for developing more accurate device of load-box calibration. Moreover, a comparative experiment has been made between this device and the tradition one, and it proved that the independent component measuring idea has obvious advantages at stability aspect.关键词
负荷箱校准装置/电网质量/校准方法/准确度等级/测量稳定性Key words
load-box calibration device, power grid quality, calibration method, accuracy class, measuring stability分类
信息技术与安全科学
