Name
Title | ||
|---|---|---|
Dynamic grid support in low voltage grids — fault ride-through and reactive power/voltage support during grid disturbances |
Abstract | ||
|---|---|---|
Faults in medium and high voltage grids lead to voltage sags in the low voltage level. Due to the voltage dip, distributed generators disconnect from the low voltage grid. Depending on the amount of disconnected generation, system stability could be compromised. With a dynamic grid support, distributed generators remain connected to the grid during faults, also called fault ride-through. Moreover, the feed in of reactive power supports the voltage during the fault. According to the present state of the art, no requirements exist for a dynamic grid support in low voltage grids. However, with a high penetration of distributed generation these requirements might change in the future. This paper investigates the dynamic grid support in low voltage grids. The impact of a dynamic grid support on a distribution grid is studied with IEEE/CIGRE benchmark models for low and medium voltage grids. Models of inverters, directly-coupled synchronous and induction generators are implemented. Furthermore, a present and a future protection system with fault ride-through capability are added to the grid models. The inverters are equipped with a reactive current controller to give a voltage support during faults. To determine the effect of a dynamic grid support, faults in high and medium voltage grids with and without dynamic grid support are simulated and evaluated. The results have shown that the effect of the voltage boost through dynamic grid support in order to recover the voltage is marginal. However, with a high penetration level of distributed generators the voltage boost increases and the impact of faults can be further limited. This investigation has demonstrated the potential of dynamic grid support in low voltage grids to avoid the loss of a large amount of power and to improve the voltage recovery. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/PSCC.2014.7038468 | PSCC |
Keywords | Field | DocType |
asynchronous generators,distributed power generation,distribution networks,electric current control,high-voltage techniques,invertors,power grids,power supply quality,power system faults,power system interconnection,power system protection,power system stability,reactive power,synchronous generators,ieee-cigre benchmark models,disconnected generation,distributed generation,distributed generators,distribution grid,dynamic grid support,fault ride-through capability,grid disturbances,grid models,high voltage grids,induction generators,inverters,low voltage grids,medium voltage grids,protection system,reactive current controller,reactive power supports,system stability,voltage dip,voltage recovery,voltage sags,voltage support,fault ride-through,low voltage grid,low voltage ride-through,reactive power/voltage support,generators,low voltage | Voltage source,Voltage optimisation,Electronic engineering,Voltage controller,Voltage regulation,Low voltage,Engineering,Electrical engineering,Grid,Voltage regulator,Voltage droop | Conference |
Citations | PageRank | References |
1 | 0.48 | 0 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| gustav lammert | 1 | 1 | 0.82 |
| tobias hes | 2 | 1 | 0.48 |
| maximilian schmidt | 3 | 1 | 0.82 |
| Peter Schegner | 4 | 27 | 10.06 |
| Martin Braun | 5 | 25 | 10.22 |