A Correction Current Injection Method for Power Flow Analysis of Unbalanced Multiple-grounded 4-wire Distribution Networks
| Autor: | Keith Sunderland, Michael Conlon, Massimiliano Coppo, Roberto Turri |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Engineering
fringe current correction Admittance network correction Distribution network analysis Fringe current correction Power flow small solar PV systems Small wind turbines Energy Engineering and Power Technology Electrical and Electronic Engineering Distribution networks 020209 energy small wind turbines 02 engineering and technology Admittance parameters 0202 electrical engineering electronic engineering information engineering Electronic engineering Power-flow study admittance network correction Iteration process Network model business.industry Ground 020208 electrical & electronic engineering distribution network analysis Electrical and Computer Engineering Current injection technique power flow business |
| Zdroj: | Articles |
| Popis: | Power flow analysis of distribution networks incorporating LV consumer representation needs to be cognizant of an unbalanced load structure and the grounding network between the consumer and network operator (TNC-S earthing). In this paper, the asymmetrical 3-phase (and neutral) power flow problem is solved by a correction current injection methodology applied to a system represented by a complex admittance matrix. The correction current injection technique is adopted to adjust the power exchange of shunt elements, whose nominal admittances are included in the system admittance matrix, through suitable fringing currents in the iteration process. This methodology offers an improved and more robust alternative for asymmetrical network scenarios under unbalanced power flow conditions when compared to the standard power flow methodologies, such as the Newton–Raphson or the forward–backward sweep approaches. These well-known methods may encounter convergence issues as a consequence of the specific consumer/network earthing arrangements especially when they need to be defined throughout the network. The algorithm presented here has been applied to a 4-wire representation of a suburban distribution network within Dublin city, Ireland, which incorporates consumer connections at single-phase (230 V N). The analysis presented uses the correction-current injection power flow algorithm in conjunction with the network model to consider the impact of distributed wind and solar (PV) generation systems ( DwG and DpvG respectively), for a range of load profiles. |
| Databáze: | OpenAIRE |
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