| In China power grid, the neutral point arc suppression coil grounding this approach is widely used. Arc suppression coil compensation ground in this way, have also been developed from the traditional way of compensation to the automatic tracking mode compensation. First system distributed capacitance accurately measured, and then follow the distributed capacitance measured accurately achieve arc suppression coil inductance value automatic adjustment, which is the arc suppression coil compensation automatic tracking two core points, and this article is focused on these two points expanded.First, in the current number of existing Petersen Coil basis of the theory, try the preliminary design for a class of self-motivation controllable arc suppression coil through the rectifying element flow through the AC load current flowing in the coil of the entire corresponding DC excitation current, this design out of the arc suppression coil eliminates the need for external DC power supply and DC windings.Secondly, in many existing systems distributed capacitance measurement method, this article focuses on how to implement the distributed capacitance is measured by injecting a constant frequency signal, the measuring principle based on a clear, innovative power system fetch two different locations injection the constant frequency signal, obtained under the influence of two different injection methods on capacitance measurements by comparing the distribution of the analysis and the specific method for reducing the measurement error made.Finally, based on these two PCSAD/EMTDC and MATLAB related software to build up simulation models. Verify that the realization of distributed capacitance measured in both the accuracy and feasibility of the program, a clear correlation method distributed capacitance measurement error factors and reduce the error, verify the applicability and controllability of the designed arc suppression coil. |
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