A5032168433- Microgrid Control and Optimization
- Smart Grid Energy Management
- Optimal Power Flow Distribution
- Islanding Detection in Power Systems
- HVDC Systems and Fault Protection
- Power System Reliability and Maintenance
- Real-time simulation and control systems
- Photovoltaic System Optimization Techniques
- Power System Optimization and Stability
- Power Systems and Technologies
- Smart Grid Security and Resilience
- Silicon Carbide Semiconductor Technologies
- Advanced DC-DC Converters
- Electric Power System Optimization
- Advanced Battery Technologies Research
- Multilevel Inverters and Converters
- Electric Vehicles and Infrastructure
- Power Systems and Renewable Energy
- Energy and Environment Impacts
- Energy Load and Power Forecasting
- Photovoltaic Systems and Sustainability
- Solar Radiation and Photovoltaics
- Integrated Energy Systems Optimization
- Energy Efficiency and Management
- Building Energy and Comfort Optimization
National Renewable Energy Laboratory
2016-2025
Institute of Electrical and Electronics Engineers
2019-2024
Strategic Education Research Partnership
2023-2024
Community Initiatives
2021-2023
Gorgias Press (United States)
2019
University of Pittsburgh
2018
North Carolina State University
2018
Riga Technical University
2018
University Hospital of Wales
2017
Cardiff University
2017
For nearly 20 years, the Test Feeder Working Group of Distribution System Analysis Subcommittee has been developing openly available distribution test feeders for use by researchers. The purpose these is to provide models systems that reflect wide diversity in design and their various analytic challenges. Because utility accessibility, have used a range research, some which outside original scope intended uses. This paper provides an overview existing feeder clarifies specific challenges...
Load modeling has significant impact on power system studies. This paper presents a review load and identification techniques. models can be classified into two broad categories: 1) static 2) dynamic models, while there are types of approaches to identify model parameters: measurement-based component-based. received more attention in recent years because the renewable integration, demand-side management, smart metering devices. However, commonly used outdated, cannot represent emerging...
This paper first studies the estimated distributed photovoltaic (PV) hosting capacities of 17 utility distribution feeders using Monte Carlo simulation based stochastic analysis, and then analyzes sensitivity PV capacity to both feeder system characteristics. Furthermore, an active network management approach is proposed maximize by optimally switching capacitors, adjusting voltage regulator taps, managing controllable branch switches, controlling smart inverters. The formulated as a...
ABSTRACT The installed capacity of photovoltaic (PV) systems has recently increased at a much faster rate than the development grid codes to effectively and efficiently manage high penetrations PV within distribution system. In number countries, in some regions are now raising growing concerns regarding integration. Management strategies vary considerably by country—some still have an approach that should behave as passive possible, whereas others demand active participation control. This...
This paper describes a granular approach for investigating the impacts of very high photovoltaic (PV) generation penetration. Studies on two real-world distribution feeders connected to PV plants are presented. The studies include both steady-state and time-series power flow analyses, which effects solar variability. goal study is predict increasing levels as it reaches penetration levels. loss return with without regulation simulated capture short-term problems such voltage fluctuations....
Electric power systems worldwide are undergoing a foundational transition from mechanical-backed generation technologies dominating the resource mixture, primarily synchronous generators, into hybrid system consisting of periods preponderance electronics-backed technologies, solar photovoltaics and wind plants battery storage systems. Almost all current inverter-based resources integrated bulk grid-following technology, there exists knowledge gap concerning impacts large-scale integration...
The installed capacity of photovoltaic (PV) systems has recently increased at a much faster rate than the development grid codes to effectively and efficiently manage high penetrations PV within distribution system. In number countries, in some regions are now raising growing concerns regarding integration. Management strategies vary considerably by country—some still have an approach that should behave as passive possible, whereas others demand active participation control. This variety...
This paper introduces a single-phase digital power-factor correction (PFC) control approach that requires no input voltage sensing or explicit current-loop compensation, yet results in low-harmonic operation over universal range and loads ranging from high-power continuous conduction mode down to the near-zero load. The controller is based on low-resolution A/D converters pulsewidth modulator, microcontroller DSP programming, well suited for simple, low-cost integrated-circuit realization,...
Distribution system analysis with ever increasing numbers of distributed energy resources (DER) requires quasistatic time-series (QSTS) to capture the time-varying and time-dependent aspects system. Previous literature has demonstrated benefits QSTS, but there is limited information available for requirements standards performing QSTS simulations. This paper provides a novel input data timeresolution, simulation time-step resolution, length simulation. Detailed simulations quantify specific...
This paper presents a quasi-static time-series test feeder based on the well-known 34 node [1]. is useful for evaluation and quantification distribution system impacts of distributed PV integrations. The load profiles solar resource used are both publically available. has been developed using data year 2010. fixed time period between power flow solutions 1 min making presented appropriate use in investigating voltage regulation device operations. A allocation algorithm also proposed...
This paper demonstrates the potential of inverter-based loads to support grid reliability during power system transients thereby enabling reliable integration renewable energy in systems. Such are referred this as grid-supportive (GSLs). A new GSL model is developed that simulates transient response capabilities can be programmed electronic loads. The model's design enables it easily integrated widely used commercial analysis software. Theoretical expressions derived explain workings model....
This paper studies the distributed photovoltaic (PV) hosting capacity in distribution feeders by using stochastic analysis approach. Multiple scenario simulations are conducted to analyze several factors that affect PV capacity, including existence of voltage regulator, location, power factor inverter and Volt/VAR control. Based on conclusions obtained from simulation results, three approaches then proposed increase which can be formulated as optimization problem obtain optimal solution. All...
This paper presents a new approach for islanding detection in distribution systems incorporating synchronous generator-based distributed generations. The proposed method first utilizes the dynamic equations of three electrical variables under situations. are: change frequency; rate and rotor angle deviation. Second, transformation these is conducted space vector domain, which gives rise to parameters, namely, semi-major axis, semi-minor inclination angle. Finally, exploiting decision...
The testing of a 500 kW photovoltaic array inverter using power hardware-in-the-loop simulation is described. A real-time simulator used with DC amplifier in order to emulate (PV) and an AC grid. test setup described detail range tests that were conducted on the are summarized.
This paper describes methods that a distribution engineer could use to determine advanced inverter settings improve system performance. These are for fixed power factor, volt-var, and volt-watt functionality. Depending on the level of detail is desired, different proposed single applicable all inverters feeder or unique each individual inverter. Seven distinctly utility feeders analyzed simulate potential benefit in terms hosting capacity, losses, reactive attained with method settings.
Distributed photovoltaic systems (DPV) can cause adverse grid impacts, including voltage or thermal violations. The installed capacity at which violations first occur and above would require system upgrades is called the hosting capacity. Current methods for determining tend to be conservative by either only considering infrequent worst-case snapshots in time and/or capturing coarse spatial resolution. Additionally, current do not accurately capture time-dependence making them unable...