Empirical Design Method for Distribution Transformer Utilization Optimization

Bunn, Michael; Das, Bhaba Priyo; Seet, Boon‐Chong; Baguley, Craig

doi:10.1109/tpwrd.2019.2926328

Cited by 13 publications

(17 citation statements)

References 27 publications

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“…Residential load aggregation with BEV charging load is carried out to obtain maximum DT utilization, which is beneficial for users, as well as for DNOs, in terms of reducing both losses and the asset upgrading costs. This work is inspired by References [13,15]. In Reference [13], the algorithm is designed to provide the maximum DT utilization under short-term emergency overloading.…”

Section: Motivationmentioning

confidence: 99%

“…This work is inspired by References [13,15]. In Reference [13], the algorithm is designed to provide the maximum DT utilization under short-term emergency overloading. Similarly, the algorithm in Reference [15] is designed to make sure T HST remains under 110 • C, based on demand response and dynamic thermal rating techniques.…”

Section: Motivationmentioning

confidence: 99%

“…Similarly, the algorithm in Reference [15] is designed to make sure T HST remains under 110 • C, based on demand response and dynamic thermal rating techniques. Regardless of optimal DT design, loading the DTs above their normal cyclic loading will likely cause the temporary weakening in the dielectric strength of insulation paper and oil, due to presence of gas bubbles when the temperature reaches 140 • C or above [13]. The model can moreover be feasible under loss of supply to make sure that the DT loading duration is within the nominal DT limits [19].…”

Section: Motivationmentioning

confidence: 99%

“…The model can moreover be feasible under loss of supply to make sure that the DT loading duration is within the nominal DT limits [19]. Besides, the voltage regulation in Reference [13] was investigated without considering the voltage drop due to impedance of the service cable. Similarly, the study considered phase voltage regulation without analyzing the voltage drop across each household and/or the amount of voltage drop between the households nearest and farthest to the DT.…”

Section: Motivationmentioning

confidence: 99%

“…Similarly, the study considered phase voltage regulation without analyzing the voltage drop across each household and/or the amount of voltage drop between the households nearest and farthest to the DT. Another drawback of the proposed algorithms in References [13,15] is their load profile consideration for a single day instead of the entire seasonal-based loading.…”

Section: Motivationmentioning

confidence: 99%

See 4 more Smart Citations

Maximum Utilization of Dynamic Rating Operated Distribution Transformer (DRoDT) with Battery Energy Storage System: Analysis on Impact from Battery Electric Vehicles Charging

et al. 2020

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This paper investigates thermal overloading, voltage dips and insulation failure across a distribution transformer (DT), under residential and battery electric vehicle (BEV) loadings. The objective of this paper is to discuss the charging impact of BEVs on voltage across consumer-service points, as well as across the life of paper insulation under varying ambient temperatures (during winter and summer), with and without a centralized battery energy storage system (BESS). This study contributes in two ways. The first part of this study deals with coordinated and uncoordinated BEV charging scenarios. The second part of this study deals with maximum utilization of a test DT rated under dynamic thermal rating (DRoDT). The DRoDT integration with BESS is carried out to flatten the load spikes, to obtain maximum DT utilization, to achieve active power and voltage supports in addition to an enhanced DT lifespan. The obtained results indicate that, when test DT operates under the proposed hybrid technique (combining both dynamic transformer ratings and a centralized BESS), it attains maximum utilization, lower hot-spot temperature, enhanced lifespan, less degraded paper insulation and an improved voltage across each consumer service point. The proposed technique is furthermore found effective in maintaining the loading across the distribution transformer within the nominal limits. However, under excess loading during peak hours, the proposed technique provides relief to the DT to a certain extent. To achieve an optimal DT operation and an enhanced BESS lifespan, the BESS is operated under nominal charging and discharging cyclic limits. Under the proposed DRoDT integration with BESS, DT attains 25.9% more life when loaded with coordinated BEV charging, in comparison to no BESS integration under the same loading scenario. The worst loading due to uncoordinated BEV charging also brings 51% increase in DT life when loaded under the proposed technique.

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Section: Motivationmentioning

confidence: 99%