Summary
Network capacity, contingencies, fault levels and background distortion support calculating how much emission can be tolerated at the Point of Connection (PoC). In the calculation of emission limits, a three times harmonic impedance factor, as well as the doubling of installed capacity, drastically reduces the harmonic emission limits that the South African utilities allocated to RPPs.
Read more Read lessCompliance with the emission limits is a challenge that RPPs often face within strict grid code rules. Exceedances are often marginal, which must be mitigated for grid code compliance. The metrology of power system instrumentation and constraints in measuring the emission from a single source of distortion with sufficient certainty is normally not included during the network planning processes.
Measurement uncertainty is shown in this paper to be mostly contributed by the class performance of the magnetic current transformer (CT) and, to a lesser extent, the power quality instrument. When considered, compliance can be granted which can prevent fruitless expenditure.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | C4_10843_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | South Africa |
| Study committees |
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| File size | 717 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
PETERSON Brandon - National Transmission Company South Africa (NTCSA); RENS Johan - Northwest University
Keywords
