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Home Consultant Service Power Plant Relay Setting Calculation
Relay Setting Calculation and Relay Setting Tables

RelayRelay Setting Calculation is important task for Power plant before operation. The parameter in this calculation is use for setting for Relay protection equipment of power plant. 





 I. Based on Decision No. 1198/QD-EVN dated 13/12/2011 

 (Issues about cooperation procedure for controlling relay setting calculation)

1.Submit dossier for new building testing:

At least 02 months before the expected date of energizing transmission line and transformer, Client must submit to A0, Ax one dossier included the relay setting calculation document attached with diagrams, specifications, other technical documents used for the calculation (Clause 9).

2.Deadline for submitting to A0, Ax the dossier of common connection point:

At least 03 months before the expected date of synchronizing the power plant and at least 02 months before the expected date of synchronizing the transmission line or substation, Client must submit to A0, Ax one dossier include the relay setting calculation document attached with diagrams, specifications, other technical documents used for the calculation (Clause 25).

3.Requirement on the dossier:

The mentioned above dossiers have to include technical documents certificated by Client and a copy of legal documents authenticated by a Consultant company who has sufficient legal capacity and electricity operation license for supplying electricity consulting services.


*Data colllecting:

    - Local grid connection diagram, Single line diagram of primary equipment

     - Specifications of primary equipment

     - Principle operation diagram, disign diagram of the relay system

     - Secondary diagrams of the relay system

     - Concerning Relay manual, software

* Setting calculation, complete the dossier

* Submitting the dossier to concerning load dispatch center

* Take the approved setting table and give it to project owner

* Support project owner in synchronizing process

* Support project owner in operation process, fault clearing process.

III. Relay setting calculation process as the following chart:

(*) Decision No. 1198/QĐ-EVN dated 13/12/2011 requires the following input:

qt tinh toan rlbv eng

1.    List of transmission lines, substations, power stations and other concerning projects that scheduled put into operation

2.    Connection single line diagram of local power grid

3.    Single line diagram which shown current transformers, voltage transformers used for the protective system, circuit breakers, dis-connectors, ...; and project layout

4.    Specifications of project primary equipment such as transmission line, transformer, BU, BI, CB, Dis-connector, compensating devices, ...

5.    Principal operation diagrams of the protective system

6.    Schematic diagram

7.    Relay info. includes name, version, options, manual, user guide

8.    Specialize software for setting

9.    Currently setting by the producers

10.    Other info.    


Customer feedback

Electricity Regulatory Authority of Vietnam


"These projects finished and we satisfied with the results. PRP brought us the sufficient and easy-to-use transmission charges calculation model. The IT system and ERAV’s website met our requirement and the training for ERAV’s staffing using the IT system and website was undertaken carefully"

 Thang Long JSC.

TLP "The Grid Impact study was prepared thoroughly and defended successfully. The SCADA and metering system was designed professionally and adequately. We feel pleased with the results PRP brought to us."

 AES Transpower

AES "The study and two supplementary reports was conducted comprehensively and carefully, with accurate computation and precise assessment. We are looking forward to cooperate with PRP in future."

 PV Nhon Trach 2 JSC.

PV NT2 "PRP is an experienced Consultant Company in preparing the Grid Impact Study; we choose them as the perfect Consultant to do it and PRP did not disappointed us."


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