Maximum power injection acceptance in a residential area

Debruyne, Colin; Desmet, Jan; Vanalme, Johan; Verhelst, Bart; Vanalme, Greet; Vandevelde, Lieven

doi:10.24084/repqj08.426

Cited by 18 publications

(16 citation statements)

References 3 publications

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“…In literature, several methods have been proposed to determine the feeder's maximum PV penetration limits [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. These methods are briefly discussed in Section 1.1.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Voltage Control Methods on Distribution Circuit’s Photovoltaic (PV) Integration Limits

Dubey

2017

Inventions

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Abstract:The widespread integration of photovoltaic (PV) units may result in a number of operational issues for the utility distribution system. The advances in smart-grid technologies with better communication and control capabilities may help to mitigate these challenges. The objective of this paper is to evaluate multiple voltage control methods and compare their effectiveness in mitigating the impacts of high levels of PV penetrations on distribution system voltages. A Monte Carlo based stochastic analysis framework is used to evaluate the impacts of PV integration, with and without voltage control. Both snapshot power flow and time-series analysis are conducted for the feeder with varying levels of PV penetrations. The methods are compared for their impacts on (1) the feeder's PV hosting capacity; (2) the number of voltage violations and the magnitude of the largest bus voltage; (3) the net reactive power demand from the substation; and (4) the number of switching operations of feeder's legacy voltage support devices i.e., capacitor banks and load tap changers (LTCs). The simulation results show that voltage control help in mitigating overvoltage concerns and increasing the feeder's hosting capacity. Although, the legacy control solves the voltage concerns for primary feeders, a smart inverter control is required to mitigate both primary and secondary feeder voltage regulation issues. The smart inverter control, however, increases the feeder's reactive power demand and the number of LTC and capacitor switching operations. For the 34.5-kV test circuit, it is observed that the reactive power demand increases from 0 to 6.8 MVAR on enabling Volt-VAR control for PV inverters. The total number of capacitor and LTC operations over a 1-year period also increases from 455 operations to 1991 operations with Volt-VAR control mode. It is also demonstrated that by simply changing the control mode of capacitor banks, a significant reduction in the unnecessary switching operations for the capacitor banks is observed.

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Section: Introductionmentioning

confidence: 99%

Impacts of Voltage Control Methods on Distribution Circuit’s Photovoltaic (PV) Integration Limits

Dubey

2017

Inventions

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“…This paper will focus on the problem of the voltage rise. Overvoltages may not only damage critical loads but also swithes PV inverters off causing loss of green energy at the most productive moments [4]. There are several overvoltage limitation methods possible.…”

Section: Introductionmentioning

confidence: 99%

Introducing small storage capacity at residential PV installations to prevent overvoltages

Cappelle¹,

Vanalme

Vispoel³

et al. 2011

2011 IEEE International Conference on Smart Grid Communications (SmartGridComm)

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Abstract-Low voltage distribution feeders are designed for unidirectional energy supply from transformer to consumer. However, the implementation of small-scale PV production units on local utilities may result in bidirectional energy flows. The simultaneous power injection at sunny moments may cause a serious voltage rise along the feeder. These overvoltages may not only damage critical loads but also switches PV inverters off causing loss of green energy at the most productive moments. This paper presents a method to limit the voltage rise by introducing small battery buffers at local production sites. A smart inverter decides whether the PV energy is injected in the grid or buffered in the batteries. The relation between battery buffer size and overvoltage reduction is presented for a typical Belgian residential distribution feeder. The influence of the buffer along the feeder is calculated by working with synthetic load profiles and solar irradiation data.

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“…Voltage levels along the feeder vary due to increase of impedance from transformer towards the end of the feeder [2]. With no DG connected, the end of the feeder has the highest voltage drop, but with introducing DG the situation is reversed and overvoltage first occurs at the end of the feeder.…”

Section: A Impact Of Dg On Grid Voltagementioning

confidence: 99%

“…Increasing the amount of grid-tied PV generation is limited by so-called hosting capacity of the grid [1]. Voltage rise above limits in residential areas due to high penetration of PV generation is an issue that can be handled by imposing a power injection limit [2]. A conservative approach is to say that beyond this maximum injection point grid reinforcements (adding new transformers, reinforcing cables) are required if more connected parties are to benefit from PV generation.…”

Section: Introductionmentioning

confidence: 99%

Microinverter Curtailment Strategy for Increasing Photovoltaic Penetration in Low-Voltage Networks

Gagrica

Nguyen

Kling

et al. 2015

IEEE Trans. Sustain. Energy

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Abstract--Transition towards smart distribution networks with high penetration of photovoltaics (PV) will involve incidental generation curtailment as an alternative to grid reinforcements. Micro-inverters are taking over popularity of string inverters in residential and some commercial areas mainly due to increased energy harvest. This paper demonstrates how micro-inverters with a modified overvoltage protection scheme could provide a reliable curtailment solution and accommodate additional PV capacity. Two wide-area curtailment schemes were proposed for a typical Dutch residential feeder with densely clustered PV. Firstly, a single worst-case scenario was used to demonstrate the capabilities of the proposed curtailment schemes: the distribution network operators can optimize between various priorities such as total feeder output, economic equality between connected parties, voltage levels, voltage unbalance and curtailment execution time. Secondly, a yearly comparison was made against conventional overvoltage protection and the results show 62-100% reduction in overvoltage losses.

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Maximum power injection acceptance in a residential area

Cited by 18 publications

References 3 publications

Impacts of Voltage Control Methods on Distribution Circuit’s Photovoltaic (PV) Integration Limits

Impacts of Voltage Control Methods on Distribution Circuit’s Photovoltaic (PV) Integration Limits

Introducing small storage capacity at residential PV installations to prevent overvoltages

Microinverter Curtailment Strategy for Increasing Photovoltaic Penetration in Low-Voltage Networks

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