Study On The System Of Automatic Compensation Of Resonant Grounded Power System

Neutral non-grounded and Petersen-coil grounded systems are also called neutral un-effectual grounded system (NUGS),The Current,Neutral grounding of medium voltage distribution network,The main of way : Directly grounded neutral point, Neutral grounding reactor, Low resistance grounding the neutral point, High resistance grounding the neutral point, Neutral Resonant Grounding; Categories can be summarized as: High-current grounding system and Small current grounding system. Neutral grounding is directly related to power system reliability, electric personal safety, the safety of electrical equipment and electrical insulation, overvoltage protection, electromagnetic pollution, protection, and many other issues.This paper describes the safety resonant grounding power of the grid elements, Discussion of compensation arc system in the medium voltage power grid in the necessity and the practical difficulties of engineering technology.In recent years, many of the advent of automatic compensation arc system.But the vast majority of systems are used start signal as an automatic displacement of the neutral point voltage compensation arc system. Resonant grounding system as an important indicator to measure the degree of mismatch is obtained by indirect methods. While increasing the system cumbersome and computational complexity. This topic through the computer system with the mismatch combination Testing, Will measure the degree of detuning sweep signal into the low pressure side of the PT, Detected by scanning the frequency compensation network, Access to the natural frequency grid,By the corresponding theory can not test the other parameters do not need special communication with you can directly calculate the degree of mismatch. Injected into the signal without affecting the normal operation of power grid frequency and can not interfere with the signal. The signal before being sent through the multi-level SCM Plastic and active band-stop filter effectively reduces the noise of the number, Greatly improve the accuracy of the measured signal, Systematic error is effectively controlled in the permitted range.On the basis of Detuning that access of the exact degree, Different from the traditional design of a pre-tuning, or with the tuning arc suppression coil arc suppression coil, Pre-integrated two ways to reconcile with the tuning arc suppression coil advantages. Abandon two disadvantages of the arc suppression coil.This paper, the arc suppression coil named this coarse tuning of the Petersen Coil. The degree of detuning of the resonant ground-based compensation system for precise automatic control. Detuning the system level can be within the limits prescribed in the national track, And further down to allow the value of its.