Proceedings ArticleDOI
High resolution output power estimation of large-scale distributed PV systems
Tong Yao,Yingying Tang,Raja Ayyanar +2 more
- pp 4620-4627
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TLDR
In this article, the authors presented a simple, yet effective method to obtain fine-time resolution output data for a very large number of PV systems using only power measurements from a significantly smaller number of solar PV inverters, and without requiring any weather station information.Abstract:
With high penetration of residential, roof-top photovoltaic (PV) systems, it has become important for the electric utilities to conduct various impact analyses to ensure proper operation and control of power distribution systems. A key requirement for these studies is the data on PV power output at fine time resolution, often in the order of minutes, and for some transient studies, even in the order of seconds. This paper presents a simple, yet effective method to obtain fine time resolution output data for a very large number of PV systems using only power measurements from a significantly smaller number of PV inverters, and without requiring any weather station information. The method uses simplified models of power generation in solar PV systems. Physical information such as latitude/longitude, orientation and tilt of PV panels, electric properties such as different PV panel parameters and measurements from a small subset of PV systems are used to estimate fine time resolution data for all the PV systems in a distribution feeder. The details of the proposed method including the simplified model and algorithms to determine the most suitable PV measurement to use for estimating the output of a given PV system are described. Extensive validation of the proposed methods using measurements from an actual high penetration PV implementation in a distribution feeder in Arizona is presented. Even though the results shown in this study are at the resolution of minutes, the method can be readily extended to finer time resolutions with the data set from the small number of PV inverters used in the estimation updated at the finer time resolution.read more
Citations
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Proceedings ArticleDOI
Power management strategy research for DC microgrid with hybrid storage system
TL;DR: In this paper, a power management strategy for a DC microgrid consisting of photovoltaic generation system, hybrid energy storage systems and AC main grid is proposed, which divides the DC bus voltage into seven ranges by six critical voltage values which are employed as the represents of power states, and according to the range which the bus voltage belongs to, the operation mode of the system can be automatically judged and switched freely.
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A study on estimation of aggregated electricity demand for one-hour-ahead forecast
TL;DR: In this paper, an upscaling model was proposed to estimate the aggregated electricity demand of several hundred households using a small number of representative households' electricity demand, which consists of a method for selecting representative households and a method of estimating aggregated demand.
Proceedings ArticleDOI
A step-up switched-capacitor converter for LEDs applied to photovoltaic systems
Antonia F. da Rocha,Edilson M. Sa,Carlos Elmano de Alencar e Silva,Geraldo E. Martins,Edson R. Marques +4 more
TL;DR: A DC-DC step-up converter with a switched capacitor to power light-emitting diodes (LEDs), which may be applied to an autonomous system, e.g. PV system, allowing cost reduction.
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Distributed PV generation estimation using multi‐rate and event‐driven Kalman kriging filter
TL;DR: This study presents the modelling and validation of the spatiotemporal variability of solar power indices at 1 minute resolution for the scale of a residential neighbourhood and investigates the effect of multi-rate and event-driven measurement updates on the performance of the MREDRIKK filter.
Proceedings ArticleDOI
Análise dos Impactos da Conexão de Usinas Fotovoltaicas na Estabilidade de Tensão do Sistema Elétrico
TL;DR: In this paper, a conexao de usinas fotovoltaicas (UFV) in a sistema eletrico de Potencia (SEP) is analyzed.
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