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Medellin Dic 9 2010Medellin Dic 9 2010Medellin Dic 9 2010 ieossa0969@gmailieossa0969@[email protected]

Resonance and HarmonicsResonance and HarmonicsResonance and Harmonics

HV Transmission SystemsHV Transmission SystemsHV Transmission Systems

IsmaelIsmael Esteban Ossa VEsteban Ossa V

UnicienciaUniciencia..

A case studyA case study

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DefinitionsDefinitionsDefinitions

RESONANCE is an electromagnetic phenomenon of energyexchange between capacitive and inductive elements which are

considered to be the energy storage elements in electrical power

systems.

HARMONICS are integral multiples of some fundamental frequency

that, when added together, result in a distorted waveform.

+ =

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IntroductionIntroductionIntroduction

WhatWhats happening in S/E power plant?s happening in S/E power plant?

Multiple measurements are overallMultiple measurements are overall

required to report this problem.required to report this problem.

The first and second reports are true butThe first and second reports are true but

uncertain on the source.uncertain on the source.

The third report is clear and definitive.The third report is clear and definitive.

Conclusions.Conclusions.

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What is happeningWhat is happeningWhat is happening

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What is happeningWhat is happeningWhat is happening

Sound extraordinary over potentialSound extraordinary over potential

transformerCCVT.transformerCCVT. Acoustic interferences.

Communications is broken.Communications is broken.

The synchronization is very difficult.The synchronization is very difficult.

The operation system is delayed.The operation system is delayed.

Complaints to the system operatorComplaints to the system operator..

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Equipment ForEquipment ForEquipment For

MeasurementsMeasurementsMeasurements

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Multiple measurementsMultiple measurementsMultiple measurements

are requiredare requiredare required

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Multiple measurementsMultiple measurementsMultiple measurements

are requiredare requiredare required

Distortion Harmonic in voltage andDistortion Harmonic in voltage and

current.current.

Power active and reactive.Power active and reactive.

Sag, Swell and flickers.Sag, Swell and flickers.

Sound level around transformers CCVT.Sound level around transformers CCVT.

Driving Point Impedance.Driving Point Impedance.

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Initial ConclusionsInitial ConclusionsInitial Conclusions

The level harmonics is over limit IEEE519.The level harmonics is over limit IEEE519.

Uncertain in the harmonic source.Uncertain in the harmonic source.

Warnings overCCVTs for stress underWarnings overCCVTs for stress under

harmonics.harmonics.

New measurements are necessary forNew measurements are necessary for

determinate that issue.determinate that issue.

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Modelling DPIModelling DPIModelling DPI

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AdditionalAdditionalAdditionalModelling in Matlab

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Measurements 2Measurements 2Measurements 2

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Medellin Dic 9 2010Medellin Dic 9 2010Medellin Dic 9 2010ieossa0969@gmailieossa0969@[email protected]

Measurements 2Measurements 2Measurements 2Modelling of the Capacitive Voltage TransformerModelling of the Capacitive Voltage TransformerModelling of the Capacitive Voltage Transformer

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Second ConclusionsSecond ConclusionsSecond Conclusions

The level harmonics is over limit IEEE519The level harmonics is over limit IEEE519onon GuatiguaraGuatiguara CircuitsCircuits

Uncertain in the harmonic source.Uncertain in the harmonic source.

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Event 01/07/2009Event 01/07/2009Event 01/07/2009

Black-out

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Event 01/07/2009Event 01/07/2009Event 01/07/2009

Paipa 2

U1 THD

mean

U2 THD

mean

U3 THD

mean

I1 THD

mean

I2 THD

mean

I3 THD

mean

01/07/2009 11:45 1.9312 1.849029 1.964153 8.78044 8.52037 8.902913

01/07/2009 11:30 2.932206 2.735785 3.150847 0.2723 0.26567 0.286701

01/07/2009 11:15 2.432544 2.495822 2.741495 0 0 0

01/07/2009 11:00 1.814668 1.982442 1.991045 0 0 0

01/07/2009 10:45 1.898321 2.063239 2.103092 0 0 0

01/07/2009 10:30 1.148405 1.243879 1.203445 1.636658 1.64276 1.619388

01/07/2009 10:15 1.070282 1.211689 1.111718 1.711925 1.735982 1.690333

Paipa 1

U1 THD

mean

U2 THD

mean

U3 THD

mean

I1 THD

mean

I2 THD

mean

I3 THD

mean

01/07/2009 14:00 1.692736 2.107215 1.551024 3.433109 3.390803 3.284376

01/07/2009 13:00 1.711861 2.052969 1.593837 2.894276 2.91675 2.689285

01/07/2009 12:00 2.243209 2.490399 2.149343 3.168963 2.970202 2.946008

01/07/2009 11:00 0 0 0 0 0 0

01/07/2009 10:00 1.53242 1.821948 1.257019 1.756949 1.772599 1.737176

01/07/2009 9:00 1.69997 1.875658 1.39542 1.659745 1.622332 1.64136

01/07/2009 8:00 1.675941 1.799378 1.355715 1.845018 1.775531 1.800602

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ConclusionsConclusionsConclusions

The source harmonicThe source harmonic is the STNis the STN (System(System

Transmission National).Transmission National).

The ION 8800 is very effective to determinationThe ION 8800 is very effective to determination

of Power Quality and Harmon

ics.of Power Qual

ity and Harmon

ics.

The STN needs to adapt its operating system byThe STN needs to adapt its operating system by

installing reactors and filters, in order to deliverinstalling reactors and filters, in order to deliver

a quality service in the voltage.a quality service in the voltage.

Resonance is affecting performance andResonance is affecting performance andreduction of the useful life ofCCVTs.reduction of the useful life ofCCVTs.

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Resonance and HarmonicsResonance and HarmonicsResonance and Harmonics

HV Transmission SystemsHV Transmission SystemsHV Transmission Systems

Questions?Questions?Questions?

Ismael Esteban OssaIsmael Esteban Ossa 057(4) 3325584057(4) 3325584

Cellular 3012913826Cellular 3012913826

Many thanks for your kind attention!

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AdditionalAdditionalAdditional

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Reaction of passiveelements: resistance,

inductive reactance,

capacitive reactance

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Resonance in seriesResonance in series

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Resonance in shuntResonance in shunt

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Driving-Point Impedance

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Filtres

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For each parameter measured, 4-30 defines three classes of measurement

performance:

Class A Parameter Performance: This class of performance is used where

precise measurements are necessary. Class A performance can be used to

verify standards compliance or resolve settlement metering. Any 4-30 parameter

based on the same signal, measured with separate class A compliant devices,

will produce matching results within the specified margin of uncertainty for that

parameter.

Class S Parameter Performance: This class of performance is used for

statistical applications such as surveys or power quality assessment, possibly

with a limited subset of parameters. Although class S uses equivalent intervals

of measurement as class A, the class S processing requirements are lower.

Class B Parameter Performance: This class of performance is defined in order

to avoid making many existing instruments designs obsolete.

2010 schneider

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