Technical analysis of prospective photovoltaic systems in Utah.

Quiroz, Jimmy Edward; Cameron, Christopher P.

doi:10.2172/1036004

Cited by 9 publications

(11 citation statements)

References 3 publications

(1 reference statement)

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“…A system impact study is performed to identify the potential electrical impacts associated with the integration of PV on the distribution system [4,5]. The purpose of the impact study is to accurately identify adverse system impacts and determine options for mitigating the impacts.…”

Section: Purpose Of Pv Integration Studiesmentioning

confidence: 99%

Time series power flow analysis for distribution connected PV generation.

Report¹,

Broderick²,

Quiroz³

et al. 2013

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Distributed photovoltaic (PV) projects must go through an interconnection study process before connecting to the distribution grid. These studies are intended to identify the likely impacts and mitigation alternatives. In the majority of the cases, system impacts can be ruled out or mitigation can be identified without an involved study, through a screening process or a simple supplemental review study. For some proposed projects, expensive and timeconsuming interconnection studies are required. The challenges to performing the studies are twofold. First, every study scenario is potentially unique, as the studies are often highly specific to the amount of PV generation capacity that varies greatly from feeder to feeder and is often unevenly distributed along the same feeder. This can cause location-specific impacts and mitigations. The second challenge is the inherent variability in PV power output which can interact with feeder operation in complex ways, by affecting the operation of voltage regulation and protection devices.The typical simulation tools and methods in use today for distribution system planning are often not adequate to accurately assess these potential impacts. This report demonstrates how quasi-static time series (QSTS) simulation and high time-resolution data can be used to assess the potential impacts in a more comprehensive manner. The QSTS simulations are applied to a set of sample feeders with high PV deployment to illustrate the usefulness of the approach. The report describes methods that can help determine how PV affects distribution system operations. The simulation results are focused on enhancing the understanding of the underlying technical issues. The examples also highlight the steps needed to perform QSTS simulation and describe the data needed to drive the simulations. The goal of this report is to make the methodology of time series power flow analysis readily accessible to utilities and others responsible for evaluating potential PV impacts. 4 ACKNOWLEDGMENTSMatthew Lave for assistance with the Wavelet-based Variability Model. Wes Sunderman for assistance with the Open Distribution System Simulator. 5

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Section: Purpose Of Pv Integration Studiesmentioning

confidence: 99%

Time series power flow analysis for distribution connected PV generation.

Report¹,

Broderick²,

Quiroz³

et al. 2013

Self Cite

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“…It is a 3-phase distribution system analysis power flow solver that can handle unbalanced phases. OpenDSS is commonly used to model solar on the grid because of its high-resolution time series analysis capabilities [3][4][5][6][7]. Currently available utility-standard simulation tools are not generally well suited for sequential or dynamic simulations needed to fully characterize the effects of PV output variability on distribution feeders.…”

Section: Opendssmentioning

confidence: 99%

“…%% Feeder Power Factor DSSText.Command = 'export mon fdr_05410_Mon_PQ'; monitorFile = DSSText.Result; MyCSV = importdata(monitorFile); delete(monitorFile); Hour = MyCSV.data(:,1); Second = MyCSV.data(:,2); feederPower = MyCSV.data(:, [3,5,7]); feederReactivePower = MyCSV.data(:, [4,6,8]);…”

Section: Time-series Analysis In Opendssmentioning

confidence: 99%

Grid integrated distributed PV (GridPV).

Reno

Coogan²

2013

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This manual provides the documentation of the MATLAB toolbox of functions for using OpenDSS to simulate the impact of solar energy on the distribution system. The majority of the functions are useful for interfacing OpenDSS and MATLAB, and they are of generic use for commanding OpenDSS from MATLAB and retrieving information from simulations. A set of functions is also included for modeling PV plant output and setting up the PV plant in the OpenDSS simulation. The toolbox contains functions for modeling the OpenDSS distribution feeder on satellite images with GPS coordinates. Finally, example simulations functions are included to show potential uses of the toolbox functions. Each function in the toolbox is documented with the function use syntax, full description, function input list, function output list, example use, and example output.

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“…A full detailed model of the distribution system can be time consuming to produce, and a timeseries simulation of a large system at a high time-resolution requires significant computational processing [2][3][4]. A simplified equivalent circuit will retain the general characteristics of the distribution system and will also reduce the modeling effort required.…”

Section: Introductionmentioning

confidence: 99%

Formulating a simplified equivalent representation of distribution circuits for PV impact studies.

Reno¹,

Broderick²,

Grijalva³

2013

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With an increasing number of Distributed Generation (DG) being connected on the distribution system, a method for simplifying the complexity of the distribution system to an equivalent representation of the feeder is advantageous for streamlining the interconnection study process. The general characteristics of the system can be retained while reducing the modeling effort required. This report presents a method of simplifying feeders to only specified buses-ofinterest. These buses-of-interest can be potential PV interconnection locations or buses where engineers want to verify a certain power quality. The equations and methodology are presented with mathematical proofs of the equivalence of the circuit reduction method. An example 15-bus feeder is shown with the parameters and intermediate example reduction steps to simplify the circuit to 4 buses. The reduced feeder is simulated using PowerWorld Simulator to validate that those buses operate with the same characteristics as the original circuit. Validation of the method is also performed for snapshot and time-series simulations with variable load and solar energy output data to validate the equivalent performance of the reduced circuit with the interconnection of PV. 4 5

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Technical analysis of prospective photovoltaic systems in Utah.

Cited by 9 publications

References 3 publications

Time series power flow analysis for distribution connected PV generation.

Time series power flow analysis for distribution connected PV generation.

Grid integrated distributed PV (GridPV).

Formulating a simplified equivalent representation of distribution circuits for PV impact studies.

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