| 摘要 |
FIELD: measuring technology. ^ SUBSTANCE: invention refers to measuring technology and can be used for determination of scattered inductance of high-voltage winding of power transformers with installed thereon fast-response regulators under load. The essence of the invention is as follows: oscillography of transient phase currents is performed in the mode of turning a switching device from one branch of winding to another. Also direct current is simultaneously and symmetrically fed to its three phase outputs. Low voltage winding is in the idle mode. Obtained curves of transient phase currents are represented analytically on negative-going intervals of current values in form of sum of direct component of balanced current and exponential free component of transient current. Scattered inductance of high-voltage winding of each phase (LâBH) is calculated by formula: LâBH=Rcä, where Rc is summary resistance of circuit elements of high-voltage winding of transformer, ä is time constant calculated as difference of time t2 and t1 where instantaneous values of currents are determined with experimental curve of transient current. ^ EFFECT: upgraded accuracy, facilitating calculation of separate value of inductances of both high-voltage and low-voltage winding. ^ 2 cl, 2 dwg, 1 ex |
