Incorporation of on-load tap changer transformers in low-voltage network planning

Nijhuis, Michiel; Gibescu, Madeleine; Cobben, J.F.G.

doi:10.1109/isgteurope.2016.7856207

Cited by 18 publications

(16 citation statements)

References 9 publications

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“…The investment in cables enhancement may not guarantee the best economical solution for voltage‐violation problems. As an example, given the future scenarios for consumption and PV penetration in Dutch LV, a probabilistic load flow approach networks expose that investment in on‐load tap‐changer (OLTC) transformer is more economical than cables enhancement [16].…”

Section: Voltage‐violation Mitigation Strategiesmentioning

confidence: 99%

Review on voltage‐violation mitigation techniques of distribution networks with distributed rooftop PV systems

Nour

Hatata

Helal

et al. 2019

IET Generation, Transmission & Distribution

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Section: Voltage‐violation Mitigation Strategiesmentioning

confidence: 99%

Review on voltage‐violation mitigation techniques of distribution networks with distributed rooftop PV systems

Nour

Hatata

Helal

et al. 2019

IET Generation, Transmission & Distribution

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“…To manage the voltage deviation, the active network management (ANM) scheme as a new SG technology can be utilised to control the bi‐directional power flow. As a part of the ANM scheme, an OLTC can be installed on the MV/LV secondary substation [132]. OLTC enables the ratio between the corresponding primary and secondary voltages to be adjusted to achieve a certain voltage [93].…”

Section: LV Network Reinforcement And/or Expansion Planningmentioning

confidence: 99%

“…However, a few studies have discussed the application of OLTC in the planning of LV networks. In [132], Nijhuis et al . investigated the incorporation of OLTC in LV networks.…”

Section: LV Network Reinforcement And/or Expansion Planningmentioning

confidence: 99%

“…However, a few studies have discussed the application of OLTC in the planning of LV networks. In [132], Nijhuis et al investigated the incorporation of OLTC in LV networks. The OLTC application has been considered into the optimisation problem of planning by the introduction of additional voltage constraints.…”

Section: Application Of Oltc: High Penetration Of Renewable Dgsmentioning

confidence: 99%

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Planning and operation of LV distribution networks: a comprehensive review

Al-Ja’Afreh

Mokryani

2019

IET Energy Systems Integration

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The low‐voltage (LV) distribution network is the last stage of the power network, which is connected directly to the end‐user customers and supplies many dispersed small‐scale loads. To achieve environmental targets and to address the energy shortage issue, governments worldwide increase the renewable energy sources (RESs) into the electricity grid. In addition, different types of low carbon technologies (LCTs) such as electric vehicles are becoming widely used. A significant portion of RES and LCTs is penetrated into the LV distribution network, which poses a wide range of challenges. To address these challenges, there is a persistent need to develop traditional planning and operation frameworks to cope with these new technologies. In this context, this study provides a comprehensive review of planning, operation, and management of LV distribution networks. The characteristics, types, and topologies of LV distribution networks plus different aspects of operation and planning are investigated. An insightful investigation of the reasons impacts and mitigation of voltage and current unbalanced in LV networks is provided. Moreover, the main three‐phase power flow techniques used to analyse the LV networks are analysed.

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“…Several studies for maximum HC determination have been made utilizing OLTC in the LV networks. In [4], the effect of OLTC on HC is studied, based on Dutch LV networks. The results indicate that the OLTC is monetarily more effective in comparison with cable reinforcement.…”

Section: Introductionmentioning

confidence: 99%

A Stochastic Assessment of PV Hosting Capacity Enhancement in Distribution Network Utilizing Voltage Support Techniques

Arshad

Lehtonen

2019

IEEE Access

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The low voltage (LV) network's constraints are prone to violations with the introduction of distributed energy resources at the customer vicinity. This study assesses the technical aspects of the realistic Finnish distribution network with varying photovoltaic (PV) penetration and quantifies the hosting capacities (HCs) of different regions. Moreover, to maximize the network's HC, having the overvoltage issue, different voltage control strategies are employed comprising on-load tap changer (OLTC), reactive power control (RPC) of inverters, network reinforcement (NR), and hybrid approaches. HC relative to different country-specific over-voltage limits are defined and the best voltage control technique is assessed, utilizing the stochastic approach of Monte Carlo simulations to model the uncertainty in the LV network's probabilistic variables. Moreover, combined medium voltage (MV)/LV network simulations are conducted to compare with the LV only simulations results. Technically, NR is the best approach to maximize the HC of a particular region but economically it is not proven a feasible one. The results presented that the OLTC employment will maximize the PV penetration if the overvoltage limit derived from EN 50160 is implemented and doubles the HC in the stricter-voltage-limits' scenarios, which can be maximized by the RPC inclusion in cohesion with OLTC. Moreover, RPC only strategy can be employed in the cases of low PV penetration scenarios, when OLTC will be proven the more expensive option. As the voltage violation limit becomes stricter, the hybrid approach of OLTC and RPC will be the best strategy. INDEX TERMS Hosting capacity, photovoltaic systems, on-load tap changer, reactive power control, distribution network.

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Incorporation of on-load tap changer transformers in low-voltage network planning

Cited by 18 publications

References 9 publications

Review on voltage‐violation mitigation techniques of distribution networks with distributed rooftop PV systems

Review on voltage‐violation mitigation techniques of distribution networks with distributed rooftop PV systems

Planning and operation of LV distribution networks: a comprehensive review

A Stochastic Assessment of PV Hosting Capacity Enhancement in Distribution Network Utilizing Voltage Support Techniques

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