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What's the most-important el-

ement of the Smart Grid? Most

North American electrical utilities

will testify that the grid will only be

as smart as the assets that are

providing it with power: that is the

transformer між іншими словами.

Of course, the mainstream con-

versation happening про

Smart Grid has very little to do with

these assets. Instead, most of the

discussion of the Smart Grid in

United States centers on the

smart meters (internationally, most

utilities understand that smart me-

ters does not equal Smart Grid) as

the aging transformer fleet con-

tinues to operate and failure rates

збільшення.

This may be with good reason,

as educating the masses про

як grid can work for them is

a crucial piece to making this tech-

nology a reality. But so is ensuring

that the grid's infrastructure is ca-

Pable of handling these «smarts».

Many things can go wrong be-

tween the generating station and

the end point ie, the customer.

With that in mind, it's fair to expect

condition-based monitoring to be-

come a bigger part of the Smart

Grid conversation because keep-

ing tabs on how assets such as

transformers є functioning is just

as important as understanding the

До того, як останній малий sampling з глобальних електричних інструментів в-

dicated that dissolved-gas analysis (DGA) is still considered very im-

portant when it comes to condition-based monitoring programs. This

is because DGA monitoring remains one of the most effective ways

для того, щоб перевірити, коли перетворювачі є про проблеми. The

problém з цим методом, невідповідно, це те, що це не є happen frequent-

ly enough. Same survey indicated that most respondents say they

сample oil used for DGA analysis twice a year at most and send these

samples to a laboratory for analysis.

And lot can happen in between samples. Thirty percent of trans-

основні риси є пов'язаними з варіаційними змінами (LTCs).

Performing oil analysis is becoming більше critical on LTCs, and many

times LTCs є лише сampled annually. Якщо LTCs є відповідальним для такого

як висока сума transformer failures, один повинен думати, що їх пошкодить

online monitoring, або на короткий випадок them quarterly.ins and outs of GDA monitoring

There are two types of DGA monitoring—manual and online. Logic

would say online monitoring should be more prevalent in this day and

age, given that online solutions є capable of providing more frequent

updates on how an asset is functioning. Але several factors, most no-

tably cost, має попередньо widespread adoption of online DGA moni-

tors. New cost effective advancements, however, are starting to make

online DGA monitors більше widely attainable for transformers and

LTC fleets.

Online DGA monitoring є найбільш популярним «online» instrumenta-

tion utilities put on їх transformers and LTCs. This does not dimin-

ish the importance of manual laboratory samples but simply bridges

гап між DGA analyses to capture an event as it evolves. The

Руля thumb is that once an online instrument shows indications of

a potential issue, ви завжди reconfirm with backup analysis. This

backup analysis is manual DGA зроблений з reputable laboratory.

BETTER DGA MONITORING

IN 22 STEPS

Беззастережно з методом, тут є деякі типи до Help ensure

коли DGA is performed, it is performed correctly with maximized ef-

fectiveness and reliability.preparation

1. CREATE A SIMPLE SAMPLING PLAN

Це involves knowing all the fittings and tools related to the equip-

ment to be sampled. It's also critical to ensure easy access to the sam-

pling point according to company regulations, і always be sure to

have a waste container to discard flushed oil. This also includes hav-

ing a schedule for when you are to perform samples on a regular predefined basis. Consideration should be given to abnormal events (such

as running a transformer for an extended period of time above its

nameplate rating). Or, after an extensive maintenance outage that in-

з'явився значний розмір роботи. Ці «тричі points» should be

well defined as well as what actions are to occur. Sample results should

also be readily available to those that need them.

2. PREPRINT THE DATA SHEET FOR SAMPLING

Preprint data sheet for equipment to be sampled, if known,

or to be filled on site. The necessary information includes 1) Equip-

ment type and manufacturer, 2) manufacturing date, 3) sampling

point, 4) date of sampling and 5) top-oil temperature.

Інші відомі дані повинні бути помічені як добре (якщо отримувалася і

tracked), так як поточний load on the transformer, cooling configura-

tion and ambient temperature. You should also strive to sample на the

Самий час з днем і сезоном, що дуже багато в різних країнах для

consistency if possible, thus removing інший variable that may affect

the sample results.

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