Accommodating High PV Penetration on Distribution Feeders

Baran, Mesut; Hooshyar, Hossein; Zhang, Shen; Huang, Alex Q.

doi:10.1109/tsg.2012.2190759

Cited by 176 publications

(122 citation statements)

References 11 publications

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“…A three-phase single-stage PV system and its control diagram are shown in Figure 1, where the PV array works as a controlled current source model whose output power is varied with illumination intensity and the temperature [2,15]. In order to ensure the PV arrays works at the maximum power point, the voltage udc and current idc at DC side are collected.…”

Section: Control Of Pv Systems Under Unbalanced Grid Voltage Conditionsmentioning

confidence: 99%

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Harmonic Injection-Based Power Fluctuation Control of Three-Phase PV Systems under Unbalanced Grid Voltage Conditions

Zhou

Lou

et al. 2015

Energies

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Unbalanced voltage will inevitably cause power and DC voltage fluctuations in a three-phase PV system. The deterioration of power quality will do great harm to the PV panels and the loads, so it is necessary to suppress the power fluctuations. This paper further explores the coefficients control strategy of PV converters under unbalanced voltage conditions, aiming to suppress power fluctuations by controlling the injection of some specific orders of current harmonics into the grid. In order to achieve this, the current reference of the PV inverter has been changed by bringing in two control coefficients, and the expression of each order of the current harmonics has been deduced. Based on the standards of PV systems, the regions from which the coefficients can be selected are determined. Then, by tuning these coefficients in the feasible regions, the output parameters (power fluctuation, current THD and odd harmonics) can be controlled precisely. The model of this method is built and simulated in PSCAD/EMTDC, and as a result, it is shown that the power fluctuations can be restricted according to different power quality requirements.

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Section: Control Of Pv Systems Under Unbalanced Grid Voltage Conditionsmentioning

confidence: 99%

“…Photovoltaic (PV) generation is widely used in renewable energy-penetrated DG systems for its easy installation [1][2][3][4]. The nonlinearity of power electronic devices and abnormal operation conditions such as grid harmonics and unbalanced voltage will lead to impacts on the power quality caused by PV systems [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Harmonic Injection-Based Power Fluctuation Control of Three-Phase PV Systems under Unbalanced Grid Voltage Conditions

Zhou

Lou

et al. 2015

Energies

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“…These targets along with cost reduction of rooftop photovoltaic (PV) systems encourage investors to install PVs and generate energy from them, resulting in a PV uptake rate of 60% per annum [4] in recent years. Although PV systems present some advantages to consumers and providers [5], high penetration of them develops some power quality problems such as current and voltage unbalance [6][7][8][9][10][11]. One of the disadvantage of load unbalance on a distribution transformer is the reduction of its useful lifetime [7,12,13].…”

Section: Introductionmentioning

confidence: 99%

Distribution transformer lifetime analysis in the presence of demand response and rooftop PV integration

Behi

Arefi

Pezeshki

et al. 2017

Renew. Energy Environ. Sustain.

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Abstract. Many distribution transformers have already exceeded half of their expected service life of 35 years in the infrastructure of Western Power, the electric distribution company supplying southwest of Western Australia, Australia. Therefore, it is anticipated that a high investment on transformer replacement happens in the near future. However, high renewable integration and demand response (DR) are promising resources to defer the investment on infrastructure upgrade and extend the lifetime of transformers. This paper investigates the impact of rooftop photovoltaic (PV) integration and customer engagement through DR on the lifetime of transformers in electric distribution networks. To this aim, first, a time series modelling of load, DR and PV is utilised for each year over a planning period. This load model is applied to a typical distribution transformer for which the hot-spot temperature rise is modelled based on the relevant standard. Using this calculation platform, the loss of life and the actual age of distribution transformer are obtained. Then, various scenarios including different levels of PV penetration and DR contribution are examined, and their impacts on the age of transformer are reported. Finally, the equivalent loss of net present value of distribution transformer is formulated and discussed. This formulation gives major benefits to the distribution network planners for analysing the contribution of PV and DR on lifetime extension of the distribution transformer. In addition, the provided model can be utilised in optimal investment analysis to find the best time for the transformer replacement and the associated cost considering PV penetration and DR. The simulation results show that integration of PV and DR within a feeder can significantly extend the lifetime of transformers.

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“…The access of DG turns the traditional distribution network into a multiple power distribution network which is covered with medium or small power supplies and load. High penetration of DG causes great changes to the steady-state and dynamic characteristics of the distribution network with DG, and as the access capacity and location of DG are different, the impacts are also different [1][2]. Therefore, it is very important to evaluate the impacts of connecting DG to the distribution network to promote the development and application of DG.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Evaluation of Impacts of Connecting Distributed Generation to the Distribution Network

Jin¹,

Shi²,

Ge³

et al. 2017

Journal of Electrical Engineering and Technology

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-In this paper, we study the various impacts of connecting distributed generation (DG) to the distribution network. The comprehensive evaluation index system (CEIS) of four hierarchies is established, considering economy, reliability and voltage quality, and the calculation methods of different indexes are presented. This paper puts forward an improved triangular fuzzy number analytic hierarchy process (ITFNAHP) to weight the second level indexes (SLI) and the third level indexes (TLI), and calculates the variation coefficient to weight the fourth level indexes (FLI). We calculate the comprehensive weight coefficients based on the weight coefficients of the SLI, TLI and FLI, and then calculate the comprehensive evaluation of satisfaction (CES) of different access schemes. On the basis of the IEEE 33-bus example system, simulations of the calculation methods and the comprehensive evaluation method are carried out under different DG access schemes according to the same total investment cost and the same permeability, respectively, and the simulation results are analyzed and discussed.

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Accommodating High PV Penetration on Distribution Feeders

Cited by 176 publications

References 11 publications

Harmonic Injection-Based Power Fluctuation Control of Three-Phase PV Systems under Unbalanced Grid Voltage Conditions

Harmonic Injection-Based Power Fluctuation Control of Three-Phase PV Systems under Unbalanced Grid Voltage Conditions

Distribution transformer lifetime analysis in the presence of demand response and rooftop PV integration

Comprehensive Evaluation of Impacts of Connecting Distributed Generation to the Distribution Network

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