Evaluation of syncrophasor use in distribution grids to estimate the regional grid state

Conference: International ETG Congress 2017 - International ETG Congress 2017
11/28/2017 - 11/29/2017 at Bonn, Deutschland

Proceedings: ETG-Fb. 155: International ETG Congress 2017

Pages: 5Language: englishTyp: PDF

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Authors:
Waffenschmidt, Eberhard; Littau, Patrick; Pelikan, Christian (Technische Hochschule Köln, Betzdorferstr. 2, 50679 Köln, Germany)

Abstract:
It is known that synchrophasor (also “voltage angle”) measurements in the transmission grid can retrieve information of the regional power grid state. This makes such measurements attractive for decentralized grid components. If they could share information about synchrophasor measurements, they could use the information about the regional grid state for independent operation. However, most of the decentralized components are connected to the distribution grid in the medium voltage or low voltage grid. Therefore, we suggest to measure the syncrophasor (also “voltage angle”) at the device’s point of connection to derive such information. On the way to the connection point of a device in the low voltage grid, this syncrophasor may change. Therefore, this publication investigates, how the syncrophasor changes on this way. This is done by simulations. As a result, the voltage angle has a variation of about 1.5deg in the medium voltage branch and 6deg at the end of the low voltage branch. This is significant smaller than the anticipated syncrophasor variations in the transmission grid of up to 60deg. Therefore, the simulations give an indication that syncrophasor measurements in the distribution grid might be used as an indication for a regional excess or demand of power.