Thailand’s econ­o­my has been achiev­ing rapid eco­nom­ic growth, at an aver­age of 10% a year, since 1988. To avoid dis­par­i­ty between the Bangkok met­ro­pol­i­tan area, and oth­er regions in the coun­try, the Thai gov­ern­ment eco­nom­ic plans pro­mot­ed decen­tral­iza­tion of indus­try from the Bangkok to the provinces.

This made pow­er demand to increase in regions where the PEA (Provin­cial Elec­tric­i­ty Author­i­ty) sup­plies elec­tric pow­er. The iGrid‑T&D RTU (iRTU) and SCADA sys­tem (iCon­trol) have been cer­ti­fied by the PEA as a solu­tion for tele­con­trol­ling PEA pow­er trans­mis­sion and dis­tri­b­u­tion networks.

Many elec­tron­ic, devices from dif­fer­ent man­u­fac­tures, are tak­ing place inside every sin­gle sub­sta­tion. The iGrid‑T&D iRTU and iCon­trol sys­tems, are capa­ble of use dif­fer­ent com­mu­ni­ca­tion pro­to­cols simul­ta­ne­ous­ly, in order to inte­grate all the incom­ing infor­ma­tion. DNP3.0 with a redun­dant com­mu­ni­ca­tion chan­nel, is used to com­mu­ni­cate the iCon­trol SCADA with the PEA con­trol center.

The iCon­trol SCADA oper­ates as the sub­sta­tion SCADA at the same time that all the infor­ma­tion is being sent to the PEA con­trol cen­ter. The iCon­trol SCADA is used in a client/server archi­tec­ture with redun­dant server.

A set of iGrid iRTU and expan­sion mod­ules are used to mon­i­tor­ize every line in the sub­sta­tion. The iRTU obtains dig­i­tal and ana­log infor­ma­tion thanks to its input/output expan­sion mod­ules. Fault pass detec­tion and Sag/Swell detec­tion fea­tures are per­formed as well. All gath­ered infor­ma­tion can be pre­processed (if need­ed), report­ed to the iCon­trol and final­ly sent to the PEA con­trol cen­ter. All pro­to­cols used by the iRTU and iCon­trol are stan­dard pro­to­cols, assur­ing per­fect inte­gra­tion with devices from oth­er manufacturers.

iGrid‑T&D has suc­cess­ful­ly com­mis­sioned sub­sta­tions from the north of Thai­land (Huay Bong wind farm) to the south (Ranong province)