PETERSEN COIL IN ELECTRICAL POWER SYSTEM TUTORIALS AND LINKS

Photo Courtesy of http://www.ohmic.com.br

Petersen Coil is agrounding reactor, used in alternating-current power transmission systems, which is designed to limit the current flowing to ground at the location of a fault almost to zero by setting up a reactive current to ground that balances the capacitive current to ground flowing from the lines. It was invented by one of our Electrical Engineering Heroes, Waldemar Petersen.

This entry is a collection of articles about Petersen Coil. Its significance, application, and technical papers that involves the use of Petersen Coil.

EARTH FAULT ARC SUPPRESSION COILS (Petersen Coils)
The arc suppression coil consists of several following basic parts: cylindrical tank made of smooth sheet with magnetic circuit and main, auxiliary aswell as measuring winding (connected to bushings placed on the tank cover) fixedinside the tank, undercarriage (for one coil type several undercarriages can be chosen), expansion tank taking the expanding oil. Read more...

NEW TECHNIQUES FOR COMPENSATED NETWORKS: TUNING THE PETERSENCOIL, DETERMINING THE NETWORK PARAMETERS AND PERFORMING EARTHFAULT CURRENT PREDICTION AND RECONSTRUCTION
This paper presents the advantages of a new technique ofpulse injection into the zero sequence system of compen-sated networks. With this technique all important networkparameters of the zero sequence system can be estimatedand the Petersen coil can be tuned. Furthermore, the maxi-mum of the expected current of a future single phase earthfault can be predicted and the current of an already oc-curred fault can be reconstructed as a function of time. Read more...

OPERATIONAL EXPERIENCES WITH THE NEW METHOD TOCONTROL PETERSEN COILS BY INJECTION OF TWO FREQUENCIES
In this paper we present field experiences of severalinstallations with the new method for the calculation of thezero-sequence network parameters and the control of Petersen coils in resonant grounded networks. The major problems for the correct calculation of the line-to-ground capacity, respectively of the resonant-point, arethe missing or very low zero-sequence voltage and the nonnegligible crosstalk of the varying load currents to the zero-sequence-voltage. As a consequence, the number of tuningoperations and non correct tuning operations increases intoday's networks. Read more...

EARTHING SYSTEM EVALUATION AND INFLUENCE ON PROTECTIONPERFORMANCE IN RESONANTLY EARTHED MV NETWORKS
In Zagreb distribution area, Petersen coils are installed infive 110/10(20) kV substations. The advantages ofresonantly earthed MV networks (continuous operation, arcself-extinction etc.) and some disadvantages (lowerprotection sensitivity) are well known. An overview of theprocedure implemented before putting Peterson coils inoperation is given, with emphasis on the earthing systemevaluation, which has proved to be rather important.Protection testing should be performed for different types offaults. All data are given for two distribution areas in whichPeterson coils have been recently installed. Read more...


Petersen Coils - Principle and Application
Peterson coils are used to in ungrounded 3-phase grounding systems to limit the arcing currents during ground faults. The coil was first developed by W. Petersen in 1916. Read more...

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