The Digital Triad

1. Process level:
Sensors and protective devices on the transformer

The sen­sors and pro­tec­tive devices on the trans­former col­lect the data required for automa­tion. Rein­hausen pro­vides a broad port­fo­lio of mea­sur­ing tech­nol­o­gy in the form of the MSENSE® prod­ucts from its MESSKO sub­sidiary. How­ev­er, the sys­tem is also open to com­po­nents from oth­er man­u­fac­tur­ers.

Conventional sensors

The MESSKO® COMPACT, MESSKO® TRASY2, and MESSKO® Betech series are used to mea­sure the oil and wind­ing tem­per­a­tures. The MESSKO® MTO and MESSKO® MMK oil-lev­el indi­ca­tors mon­i­tor the fill lev­el.

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Intelligent sensors

The MSENSE® DGA mon­i­tors the gas con­tent in the oil, while the MSENSE® BM mon­i­tors the sta­tus of the capac­i­tance grad­ed bush­ings. The MESSKO® MTeC EPT303 FO mea­sures the wind­ing tem­per­a­ture direct­ly at the source.

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Protective devices

The pro­tec­tive devices enable fault-free oper­a­tion and pro­vide impor­tant data. They include the MESSKO® MTraB® dehy­drat­ing breather and the MESSKO® MSafe® Buch­holz relay.

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Open to sensors from other manufacturers

Sen­sors from third-par­ty man­u­fac­tur­ers can eas­i­ly be con­nect­ed to ETOS® via stan­dard­ized inter­faces.

2. Field level:
Control, regulation and monitoring directly on the transformer

ETOS® forms the heart of the dig­i­tal­iza­tion solu­tion: The com­bi­na­tion of hard­ware com­po­nents and soft­ware serves as the inter­face between the process and con­trol lev­els. This is where all of the data from the trans­former comes togeth­er to be ana­lyzed and eval­u­at­ed using algo­rithms devel­oped by Rein­hausen or, alter­na­tive­ly, cus­tomers’ own algo­rithms. The open stan­dard for dig­i­tal­iza­tion can be used for trans­form­ers from all man­u­fac­tur­ers regard­less of age or pow­er class — for a sin­gle trans­former or an entire fleet.

ETOS® is avail­able in a range of designs and hous­ing types — in the form of plug­gable mod­ules, a stand-alone ver­sion in a con­trol cab­i­net, or an inte­gra­tion solu­tion in a motor-dri­ve unit, depend­ing on the require­ments. Fit­ting ETOS® direct­ly on the trans­former allows the cap­tured data to be trans­ferred to the con­trol sta­tion via net­work pro­to­col using a fiber-optic cable. This great­ly reduces the amount of wiring need­ed dur­ing instal­la­tion and sig­nif­i­cant­ly cuts costs com­pared to a con­ven­tion­al con­nec­tion method.

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Modular structure

There are six modular function packages to choose from depending on the monitoring requirements.

Transformer monitoring

This mod­ule pro­vides sta­tus reports regard­ing tem­per­a­tures, pro­tec­tive devices, cur­rents and volt­ages. It also cal­cu­lates the aging and loss-of-life rates of the trans­former.

On-load tap-changer monitoring

This mod­ule mon­i­tors the sta­tus of the on-load tap-chang­er on the basis of such fac­tors as the motor-dri­ve sig­nals, switch­ing sta­tis­tics and oil tem­per­a­ture.

Online DGA monitoring

This mod­ule ana­lyzes var­i­ous gas con­cen­tra­tions and the mois­ture in the insu­lat­ing oil in order to mon­i­tor the active part and the wind­ings.

Control and monitoring of the cooling system

This mod­ule mon­i­tors cool­er starts and cool­ing effi­cien­cy. It also ana­lyzes the load con­di­tions and ther­mal con­di­tions of the trans­former to enable intel­li­gent con­trol of the cool­ing sys­tem.

Bushing monitoring

This online sys­tem uses the dou­ble-ref­er­ence method to con­tin­u­ous­ly mon­i­tor the bush­ings.

Automatic voltage regulation

This func­tion pack­age ranges from sim­ple volt­age reg­u­la­tion, to a wide range of par­al­lel oper­a­tion meth­ods for trans­form­ers, up to com­plex reg­u­la­tion tasks.

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Cybersecurity

Hack­er attacks on pow­er net­works rep­re­sent a real threat in today’s soci­ety. IT secu­ri­ty was there­fore the top pri­or­i­ty even in the ear­ly stages of devel­op­ing ETOS®. The result is a state-of-the-art solu­tion that cov­ers every­thing from prod­uct archi­tec­ture to sup­port. The prod­uct fea­tures include an inte­grat­ed fire­wall, encrypt­ed com­mu­ni­ca­tion, and role-based access con­trol. The process fea­tures include exter­nal audit­ing and prod­uct secu­ri­ty man­age­ment by a ded­i­cat­ed CERT team. The sys­tem con­tin­u­al­ly mon­i­tors the elec­tron­ic com­po­nents for poten­tial vul­ner­a­bil­i­ties and pro­vides the cus­tomer with sim­ple secu­ri­ty updates.

3. Control level:
Superordinate visualization and control of the transformer fleet

TESSA® — The fleet mon­i­tor­ing solu­tion from Rein­hausen
For oper­a­tors of elec­tri­cal ener­gy net­works, it is cru­cial to know the pre­cise sta­tus of their trans­former fleet. ETOS® pro­vides all of the nec­es­sary data for each trans­former. TESSA®, the fleet mon­i­tor­ing solu­tion devel­oped by Rein­hausen, com­bines this data into an over­all pic­ture, mak­ing it an intel­li­gent tool for mon­i­tor­ing all equip­ment. Thanks to its real-time mon­i­tor­ing, main­te­nance inter­vals can be extend­ed and on-site sys­tem inspec­tions reduced. With the ear­ly warn­ing sys­tem, oper­a­tors can respond imme­di­ate­ly when a fault is iden­ti­fied. This pre­vents cost­ly repairs.

SCADA and cloud systems

If desired, oper­a­tors can also inte­grate the data and infor­ma­tion into exist­ing SCADA sys­tems and all stan­dard cloud sys­tems. This is pos­si­ble thanks to the open, stan­dard­ized inter­faces pro­vid­ed by ETOS®.