REGULATORY CODES AND STANDARDS. BY ENGR. BOLA ODUBIYI AT THE NERC/NARUC MEETING JULY 17, 2008. COMMISSION’S MANDATE THE NETWORK CODES THE GRID CODE MANAGING THE GRID CONNECTION TO THE GRID TRANSMISSION STANDARDS GENERATION STANDARDS ANCILLARY SERVICES CONCLUSION.
ENGR. BOLA ODUBIYI
AT THE NERC/NARUC MEETING JULY 17, 2008
THE NETWORK CODES
THE GRID CODE
MANAGING THE GRID
CONNECTION TO THE GRID
CONCLUSIONOUTLINE OF PRESENTATION
The Nigerian Electricity Regulatory Commission (NERC) was established by the Electric Power Sector Reform Act of 2005 to, among other things:
NERC is also expected to establish, or as the case may be, approve appropriate operating codes and safety, security, reliability and quality standards.
In keeping with its objects, NERC has published a set of operational codes for the efficient management of the Nigerian Electricity Supply and Distribution Network.
The Network Codes which came into force on August 1, 2007 are:-
The Grid Code contains the day – to – day operating procedures and principles governing the development, maintenance and operation of an effective, well coordinated and economic Transmission System for the electricity sector in Nigeria.
It stipulates the standards for any equipment to be connected to the transmission network.
The Grid Code is designed to:-
Management of the Grid involves:
Users connected or seeking connection to the Transmission Network shall provide a Single Line Diagram showing:-
For each circuit shown on the Single Line Diagram, each user shall provide the following details relating to part of its User’s System:
For each transformer shown in the Single Line Diagram, User shall provide the following:
For all independently switched reactive compensation equipment, not operated by the Transmission Company of Nigeria and connected to the User’s system at 33kV and above, the following information is required:
The User is required to supply the following information concerning an protection equipment which can trip or inter trip or close any connection point circuit breaker or any TCN circuit breaker:
a. By a frequency greater than or equal to [51.75]Hz;
b. By a frequency less than or equal to [48.5]Hz.
a. For the 330 kV system, the BIV is 1300 kV.
b. For the 132 kV system, the BIV is 650 kV.
(a) 330 kV – a Total Harmonic Distortion of 1.5% with no individual harmonic greater than 1%;
(b) 132 kV – a Total Harmonic Distortion of 2% with no individual harmonic grater than 1.5%.
(i) From cold, within 10 hours;
(ii) From warm, within 6 hours;
(iii) From hot within 3 hours.