Petersenova cívka s regulátorem REG-DP

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Operating Instructions for the Petersen-Coil Regulator

Vydal: EBERLE Controls GmbH

Strana 23 z 272

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These three parameters are easily determined from the resonance curve.Page 23 Applications Continuing from the previous chapter, Figure shows the progression the absolute val- ue the zero sequence voltage UNE based the coil position (Ipos=BLU1N).14) simplified to: 1 U Res N U W Y U U Y Y    (1. , , 1 1 ( ) 2 1 ne C W res U W U j B U Y Y        (1. Figure Locus zero sequence voltage UNE The resonance curve healthy grid can described the following parameters: Ures Maximum zero sequence voltage Ires Coil position Ipos Ures point; corresponds the momentary grid capacitance ICE Iw Expected watt-metric current across the faulty section, when low impedance earth fault occurs.18) Multiplying expression . Figure shows the corresponding locus (absolute value and phase) based the coil position.17) There, based the assumption that YW, the following equation applies the corre- sponding coil position Ipos,W=BL,WU1N. At the resonance point (BC=BL), equation (1.16) In order understand IW, have take look the point the resonance curve where: 1 2 NE Res U U  (1