Impact of service and feeder cable upgrade on hosting capacity for single phase connected photovoltaics

Abstract

The addition of photovoltaics (PV) to a grid impacts the performance of that grid in a number of ways. These impacts limit how much PV can be connected, termed 'hosting capacity (HC)'. The impacts include overvoltage and overloading. Mitigation of impacts can be achieved in different ways: in this paper, upgrade of service cable and feeder cable has been considered, one of the classical solutions. Cable size upgrades to 16, 25 and 35 mm 2 from 10 mm 2 have been studied to mitigate overvoltages in a 28-customer Swedish suburban grid. A stochastic planning-based approach has been used to obtain a performance parameter that can be used to compare the mitigation methods. The results showed an improvement in overvoltage and hosting capacity with cable upgrade. The hosting capacity is also shown to be sensitive to the risk chosen and to the PV size.

A Comprehensive Review of Renewables and Electric Vehicles Hosting Capacity in Active Distribution Networks

“…As the DG-HC term refers to the higher penetration level at which the DN still operates within accepted limits without infrastructure upgrading, some modifications, such as conductors oversizing, raising transformers ratings, and integrating voltage regulators, may enhance this DG-HC [178,179]. DN infrastructure upgrading was introduced as an effective solution for HC improvement in various recent publications [111,[178][179][180][181][182]. Depending on two upgrading alternatives, i.e.…”

“…Cables oversizing is one of the most effective upgrading actions to enhance HC as illustrated in [111,180]. 10 mm 2 cables of a Swedish DN are oversized to higher cross-sectional areas, without any cost calculations, and then the voltagerestricted HC is calculated in [180]. Findings reveal higher HC is achieved with higher cross sectional area cables.…”

Photovoltaic hosting capacity improvement based on the economic comparison between curtailment and network upgrade

“…Therefore, it is important to analyse the cumulative curtailment compensation cost incurred upon the DSOs to compare its effectiveness with the upgrade cost. This cumulative curtailment cost is the net sum of all the marginal compensation costs until the level when marginal curtailment cost exceeds upgrade cost as given in (6). N represents the breakeven point where marginal curtailment cost exceeds upgrade cost.…”

“…Network performance can be investigated by various impact factors, mainly voltage rise and overloading issues that can be improved to increase the hosting capacity [2–5]. Thus, voltage management as a key operational challenge was discussed in [6, 7] and the authors presented various techniques to improve HC. The voltage rise problem in a Swedish 28‐customer suburban network was technically addressed by reinforcing the feeder and service cable in [6] using stochastic planning without considering the cost implications of network upgrade.…”

“…Thus, voltage management as a key operational challenge was discussed in [6, 7] and the authors presented various techniques to improve HC. The voltage rise problem in a Swedish 28‐customer suburban network was technically addressed by reinforcing the feeder and service cable in [6] using stochastic planning without considering the cost implications of network upgrade. Moreover, [8, 9] proposed regulation of PV inverters for managing the voltage rise issues due to reverse power flow.…”