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X.T. Dong, R. Summer, and U. Kaltenborn - Germany RIF Session1 Paper 0637

Thermal Network Analysisin MV GIS Design

Areva Energietechnik GmbH – Sachsenwerk Medium Voltage, Germany

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IntroductionThermal network method

Simulation procedure

Results & summary

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Thermal network methodAnalogy between electrical and thermal field

Potential differenceTemperature differenceCurrent flowHeat flowElectrical resistanceThermal resistanceElectrical capacitanceThermal capacitance

thRPT ⋅=Δ RIU ⋅=Δ

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Thermal network methodPSPICE

User interface (Input & output)

Translator & solver

Theta librarySymbol with physics model to describe thermal sources & resistance/ capacitances

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ExampleTwo conductors with screw joint

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User library Bushing part

Example

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Simulation procedureModel creation

Single phase, multi-units representation

Model verification

Result prediction

Design optimization

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Simulation model for a type test

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Model verification

GHA 2500A double busbar feeder -- busbar top

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Measurement points

Tem

pera

ture

rise

MeasuredMeasured GasSimulationSimulation_Gas

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Model verification

GHA 2500A double busbar feeder -- busbar rear

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Measurement points

Tem

pera

ture

rise

MeasuredMeasured GasSimulationSimulation_Gas

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Temperature rise prediction

GHA 2500A single busbar feeder

0

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Measurement points

Tem

pera

ture

rise

MeasuredMeasured GasSimulationSimulation_Gas

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Conclusion

High modeling efficiency

Very Low computational cost

Good accuracy