Smart network control with coordinated PV infeed

Hempel, Sabrina; Schmidt, J.-D.; Gambn, Pablo; Tröster, Eckehard

doi:10.1049/iet-rpg.2018.5268

Cited by 6 publications

(5 citation statements)

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“…This established statistical method is explained in detail in [30] and is used in various fields including power and energy systems [3, 31, 32]; for example, authors in [33] have utilized it to assess dynamic frequency regulation reserve requirements. A correlation coefficient ( r ) between 0.1 − 0.3 shows small correlation, 0.3 − 0.5 moderate correlation, and larger than 0.5 indicates strong correlation [34]. In this paper,

r_{t h r e s h o l d}

is set to 0.85, when proceeding through step 3 of Figure 3.…”

Section: Test Studies Results and Discussionmentioning

confidence: 99%

An empirical approach to frequency droop characterization from utility‐scale photovoltaic plants operation in a power system

Arzani

Venayagamoorthy

2021

IET Generation Trans & Dist

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PV plant power excursions can have adverse implications on grid frequency. This phenomenon is observable due to inherently uncertain cloud transients across a local PV plant. Hence, provision of decision-based controllers for centralized power inverters becomes imperative for supporting local grid operations. Such controllers can be improved to better counteract minutes-based PV power deviations from its stable equilibrium. Thus, grid frequency deviations require further investigation at PV plant point of interconnection to the grid. In this research, single and spatially distributed utility-scale PV plants operation is studied on a real-time power system simulator, under fast-changing meteorological conditions at different PV site loading levels (P PV −re f). Software-in-the-loop Monte Carlo simulation is conducted and an empirical approach is proposed for characterizing minutes-based variations in grid frequency originating from PV plant operation, that is, power fluctuations at different P PV −re f. The power−frequency curve obtained at the PV site can be incorporated in form of an empirical frequency droop function in characteristics curve of adjacent auxiliary power source(s). A prominent feature of this adaptive frequency droop is that it considers PV site loading levels during different hours, giving it leverage over common practice constant droop(s). A hardware-in-the-loop platform is presented allowing field derivation of adaptive frequency droop curves using hardware PMU time-series data analytics.

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r_{t h r e s h o l d}

is set to 0.85, when proceeding through step 3 of Figure 3.…”

Section: Test Studies Results and Discussionmentioning

confidence: 99%

An empirical approach to frequency droop characterization from utility‐scale photovoltaic plants operation in a power system

Arzani

Venayagamoorthy

2021

IET Generation Trans & Dist

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“…In [26], a new approach to inverter reactive power control is presented. It assumes the installation of an additional device, called a SNOOPI-box (Smart Network Control with Coordinated PV Infeed).…”

Section: Pv Inverter Controlreactive Power Controlmentioning

confidence: 99%

“…Another solution, as in [26], ensuring a certain degree of coordination of the entire network, is the parameterization of Q(P) characteristics for each of the PV inverters, as described in [52]. Thanks to the use of voltage sensitivity matrix analyses, it is not necessary to provide communication channels between devices to achieve coordination of PV units.…”

Section: Pv Inverter Controlreactive Power Controlmentioning

confidence: 99%

A Review of Voltage Control Strategies for Low-Voltage Networks With High Penetration of Distributed Generation

Janiga

2020

IAPGOS

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Deterioration of voltage conditions is one of the frequent consequences of connecting an increasing number of photovoltaic sources to the low-voltage (LV) power grid. Under adverse conditions, i.e. low energy consumption and high insolation, microgeneration can cause voltage surges that violate acceptable limits. Research shows that the increase in voltage is the main limitation for connecting new energy microsources to the LV network and forces the reconstruction of the network. An alternative to costly modernizations can be the implementation of appropriate strategies for controlling network operation to maintain the voltage at the required level. The article presents an overview of the methods and concepts of voltage control in a low-voltage network developed so far to mitigate the undesirable phenomenon of voltage boosting. The focus was mainly on local methods—not requiring communication infrastructure—as best suited to the conditions of Polish distribution networks. Gathering the results of many tests and simulations carried out in different conditions and on different models allowed for the formulation of general conclusions and can be a starting point for further research on a control method that can be widely used in the national power system.

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“…None of the existing literature summarised above presents a method for estimating PV curtailment from volt-watt control without additional sensors or communications. Other related studies have considered only the performance and effectiveness of smart inverter GSFs in mitigating voltage issues on the distribution network [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Estimation of solar photovoltaic energy curtailment due to volt–watt control

Emmanuel

Giraldez

Gotseff

et al. 2020

IET Renewable Power Generation

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The widespread deployment of autonomous inverter-based solutions for mitigating voltage and frequency excursions caused by high-penetration photovoltaic (PV) systems has drawn increased attention due to their potential impact on PV production. It is now important to quantify the amount of solar energy curtailed as a result of the activation of inverter-based grid support functions (GSFs). This study proposes a methodology for estimating the impact of volt-watt on customer PV energy curtailment using smart meter voltage data. This method estimates maximum possible curtailment for a given volt-watt curve based on the customer smart meter voltage during the time period of interest. This study compares the proposed methodology with field measurements using irradiance and customer inverter data from Hawaii as well as with results from a previous simulation-driven study on the impact of advanced inverter GSF activation on PV energy curtailment. Results show that the proposed method for estimating lost PV production caused by volt-watt control aligns reasonably well with field measurements and computer simulations for hundreds of customers. The proposed method could be used to estimate customer energy curtailment, which could inform future compensation mechanisms for utilities leveraging customer-sited resources to mitigate high voltage and defer infrastructure upgrades.

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Smart network control with coordinated PV infeed

Cited by 6 publications

References 0 publications

An empirical approach to frequency droop characterization from utility‐scale photovoltaic plants operation in a power system

An empirical approach to frequency droop characterization from utility‐scale photovoltaic plants operation in a power system

A Review of Voltage Control Strategies for Low-Voltage Networks With High Penetration of Distributed Generation

Estimation of solar photovoltaic energy curtailment due to volt–watt control

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