Electricity Grid Regulation (Elektrik Şebeke Yönetmeliği)

Overview

The Electricity Grid Regulation was issued by the Energy Market Regulatory Authority (EPDK) and published in Official Gazette 29013 (repeated issue) of 28.05.2014. It is the Turkish transmission grid code, governing planning, operation, supply reliability and power-quality conditions for users connected to the TEİAŞ network. Data centres connected at 154 kV or fed from TEİAŞ substations must comply with its harmonic and reactive energy limits.

The regulation defines the grid quantities. Nominal frequency is 50 Hz, controlled by TEİAŞ within 49.8-50.2 Hz. Nominal transmission voltages are 400, 154 and 66 kV; normal operating bands are 340-420 kV and 140-170 kV, and plus or minus 10% for 66 kV and below. Distribution-level voltages inside the transmission system are listed as 34.5, 33, 31.5, 15.8, 10.5 and 6.3 kV.

On power quality, users connected to the transmission system must respect the current harmonic limits in Annex 8 at the point of common coupling. Monthly inductive reactive energy may not exceed 20% of the active energy drawn, and capacitive reactive energy fed back may not exceed 15%. In 400 kV and 154 kV systems, negative-sequence voltage should not exceed 1% of positive sequence. N-1 planning also falls within the regulation's scope.

As a limitation, this summary rests only on the recorded articles; the detail of the Annex 8 harmonic tables is not reproduced here.

Key points

1. Nominal frequency is 50 Hz, controlled by TEİAŞ within 49.8-50.2 Hz (Article 7).
2. Nominal transmission voltages are 400, 154 and 66 kV; operating bands 340-420 kV and 140-170 kV, plus or minus 10% for 66 kV and below (Article 8).
3. Distribution-level voltages inside the transmission system: 34.5, 33, 31.5, 15.8, 10.5 and 6.3 kV (Article 8).
4. Users connected to transmission must respect the Annex 8 current harmonic limits at the point of common coupling (Article 13).
5. Monthly inductive reactive energy may not exceed 20% of active energy, and capacitive reactive energy 15% (Article 14).
6. Negative-sequence voltage in 400 kV and 154 kV systems should not exceed 1% of positive sequence (Article 23).
7. Data centres connected at 154 kV or fed from TEİAŞ substations are subject to the harmonic and reactive limits.

Using it in design

• In power-quality checks, assess harmonic current emission of UPS and IT loads against Annex 8 limits at the point of common coupling, and size active filters if needed.
• Size power-factor correction so that monthly inductive and capacitive reactive ratios stay below 20% and 15%.
• Use 34.5 kV and 154 kV as the default voltage options for large sites.

Who should read it

Electrical designers and grid-connection leads for data centres connecting to the TEİAŞ network.

Related standards

• Elektrik Piyasası Bağlantı ve Sistem Kullanım Yönetmeliği
• IEC 61000-3-12
• IEEE 519

Publication details

Authors

Enerji Piyasası Düzenleme Kurumu (EPDK)

Publisher

Enerji Piyasası Düzenleme Kurumu (EPDK)

Year

2014

Document number

RG 29013 mükerrer (28.05.2014)

Document language

Turkish

Source type

Turkish regulation

Access

Free to read

Licence

Bibliographic reference only — the document is not redistributed here; confirm reuse terms at the original source

Citation