Study Of Petersen Coil Automatic Tracking Compensation Based On Injected Constant Frequency

The neutral resonant grounding by arc-suppression coils is widely utilized in intermediate voltage distribution network in our country. With the expansion of the grid, traditional arc suppression coil compensation has been gradually replaced by automatic tracking compensation. For automatic tracking arc suppression coil compensation technology, Its implementation is crucial two points:the distribution of the system to accurately measure capacitance, Petersen coil itself automatically and accurately adjustable. For these two points, the paper achieved by injecting a constant frequency signal distributed capacitance measurements, while the design of the new Petersen coil, thereby improving the automatic tracking arc suppression coil compensation technology, specific research work in the following areas:First, the classification Petersen coil and existing distributed capacitance measurement methods are described in detail, defined the scope and the advantages and disadvantages of various types of arc suppression coil and a variety of measurement methods. Petersen coil technology is the development of automatic tracking compensation Petersen coil in the development and improvement of methods of measuring capacitance up.Secondly, the introduction of the Z-Petersen coil grounded through the neutral grounding variable leads the way to analyze the role of Petersen coil, focusing on the role of magnetizing inrush current characteristic variable Z-grounded principles, the capacity to select and change the Z-grounded.Again, by applying the injection of a certain magnitude to achieve constant frequency signal distribution method for measuring the capacitance of the system has done a detailed analysis of the introduction. Proposed injection signal capacitance measurement at the same time in three different ways and measures to reduce the impact of the errors associated with the analysis of capacitance measurements made errors. Designing a new type of self-stimulation controlled core saturation Petersen coil, made innovative improvements to its control. I.e., without the installation of external DC power supply and DC winding, the current drawn by the load corresponding to the normal DC excitation current is rectified by the rectifier circuit.Finally, building simulation models based on the simulation programming software,. Verify that the program to achieve distributed under three injected into the feasibility and accuracy of capacitance measurements, the system is distributed capacitance measurement errors made under different injection frequency analysis related to verification, validation of the design of the self-excited type controllable arc core saturation controllability and applicability of the coil.