Impact of the photovoltaic system variability on transformer tap changer operations in distribution networks

Gan, Chin Kim; Lau, Cheiw Yun; Baharin, Kyairul Azmi; Pudjianto, Danny

doi:10.1049/oap-cired.2017.0476

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…Different approaches have been used in the literature to study solar variability and its impact on the electricity grid [22,23,26,[39][40][41]. For a review that includes various definitions of solar variability indices, the reader is referred to Reference [24].…”

Section: Discussionmentioning

confidence: 99%

Characterizing Variability of Solar Irradiance in San Antonio, Texas Using Satellite Observations of Cloudiness

et al. 2018

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Since the main attenuation of solar irradiance reaching the earth’s surface is due to clouds, it has been hypothesized that global horizontal irradiance attenuation and its temporal variability at a given location could be characterized simply by cloud properties at that location. This hypothesis is tested using global horizontal irradiance measurements at two stations in San Antonio, Texas, and satellite estimates of cloud types and cloud layers from the Geostationary Operational Environmental Satellite (GOES) Surface and Insolation Product. A modified version of an existing solar attenuation variability index, albeit having a better physical foundation, is used. The analysis is conducted for different cloud conditions and solar elevations. It is found that under cloudy-sky conditions, there is less attenuation under water clouds than those under opaque ice clouds (optically thick ice clouds) and multilayered clouds. For cloud layers, less attenuation was found for the low/mid layers than for the high layer. Cloud enhancement occurs more frequently for water clouds and less frequently for mixed phase and cirrus clouds and it occurs with similar frequency at all three levels. The temporal variability of solar attenuation is found to decrease with an increasing temporal sampling interval and to be largest for water clouds and smallest for multilayered and partly cloudy conditions. This work presents a first step towards estimating solar energy potential in the San Antonio area indirectly using available estimates of cloudiness from GOES satellites.

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Section: Discussionmentioning

confidence: 99%

Characterizing Variability of Solar Irradiance in San Antonio, Texas Using Satellite Observations of Cloudiness

et al. 2018

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“…There are five different types of PV profiles that might happen based on Malaysia's weather conditions, based on the recorded and analyzed site data [24,28]. The authors clustered the data sets of a year as clear day, overcast day, moderate variability, mild variability, and high variability.…”

Section: Solar Variability Profiles and Modelingmentioning

confidence: 99%

Design of Battery Storage System for Malaysia Low Voltage Distribution Network with the Presence of Residential Solar Photovoltaic System

et al. 2020

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The recent proliferation of residential solar photovoltaic systems has prompted several technical challenges to the operation of low voltage (LV) distribution networks. More specifically, the mismatch of the solar generation and demand profiles, particularly during the midday when the demand is low and solar generation is high, can lead to network overvoltages and increased network losses. In addition, the solar photovoltaic system is not able to reduce the system’s maximum demand, given the residential LV network would normally have an evening peak when the sun goes down. In this regard, this paper examines two different control strategies in designing the battery energy storage system. One aims to eliminate reverse flow caused by the surplus solar energy and the other aims for peak demand reduction.

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“…Traditionally, various devices have been used to regulate the voltage at the distribution network, such as on-load tap changer transformers (OLTC) [7][8][9][10][11], volt/var control (VVC) with fixed capacitor banks (CBs) [12][13][14], or switched capacitors and inductors as in static var compensators (SVC) [15,16]. Hybrid volt/var control combining OLTCs, CBs, and SVCs is typically utilized to provide var support [17].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Capacitor-Less D-STATCOM for Voltage Profile Improvement in Distribution Network With High PV Penetration

Rohouma

Metry

Balog

et al. 2022

IEEE Open J. Power Electron.

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Distributed Energy Resources (DERs) have disrupted the traditional electrical system. Grid-connected photovoltaic (PV) systems deliver electric energy closer to the consumer, shifting the paradigm from centralized to distributed generation. The impact of the stochastic PV output power gives rise to potentially rapid voltage fluctuations. Reactive power compensation is needed to regulate the voltage profile to meet the relevant standards. Traditional approaches like switched capacitors cannot provide reactive power that is continuously adjustable at short time scales. This paper examines an alternative distribution static synchronous compensator (D-STATCOM) based on a matrix converter (MC) for the low voltage distribution networks with high PV penetration. This technology can extend service life by using inductors for energy storage. The converter being studied provides ancillary services, including reactive power support; the impact on reliability, operational constraints, and electrical behavior is demonstrated. The contribution of this paper is a detailed analysis and impact study of the capacitor-less D-STATCOM in high PV penetration distribution networks. The significance of this paper is that it studies the behavior of the power electronics converter and its interaction with the power systems without assuming or neglecting details of either. Compensation effects and reliability comparisons between the proposed capacitorless D-STATCOM and the incumbent D-STATCOM technology are also studied in

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Impact of the photovoltaic system variability on transformer tap changer operations in distribution networks

Cited by 8 publications

References 3 publications

Characterizing Variability of Solar Irradiance in San Antonio, Texas Using Satellite Observations of Cloudiness

Characterizing Variability of Solar Irradiance in San Antonio, Texas Using Satellite Observations of Cloudiness

Design of Battery Storage System for Malaysia Low Voltage Distribution Network with the Presence of Residential Solar Photovoltaic System

Analysis of the Capacitor-Less D-STATCOM for Voltage Profile Improvement in Distribution Network With High PV Penetration

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