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The intermittent and uncertainty nature of variable resources rises the need to investigate the effect of the technical operation aspects of power system operation and transmission lines constrains, on estimating the penetration level of variable resources that enhances the economic and operation aspects of power system. The Incorporation of these resources into systems rises the need to evaluate...
The operation of a photovoltaic (PV) generating system under intermittent solar radiation is a challenging task. Furthermore, with high penetration levels of photovoltaic energy sources being integrated into the current electric power grid, the performance of the conventional synchronous generators is being changed and grid inertial response is deteriorating. This paper proposes a combined virtual...
We propose Powernet as an end-to-end open source technology for economically efficient, scalable and secure coordination of grid resources. It offers integrated hardware and software solutions that are judiciously divided between local embedded sensing, computing and control, which are networked with cloud-based high-level coordination for real-time optimal operations of not only centralized but also...
Forecasting of wind speed and wind power generation is indispensable for the effective operation of a wind farm and the optimal management of revenue and risks. Hybrid forecasting of time series data is considered to be a potentially effective alternative compared with the conventional single forecasting modeling approaches such as autoregressive integrated moving average (ARIMA) and artificial neural...
Recently, Queensland state of Australia has seen a rapid growth in rooftop solar photovoltaic (PV) installations. However, the growth can be throttled due to voltage violation constraints at the distribution feeder level. Consequently, distribution utilities in Queensland have set a guideline for new PV inverter connections. During light load condition and under high availability of PV power, voltage...
To reduce carbon emission from the power generation sectors, retrofitting the power plants with carbon capture system or building new carbon capture power plant (CCPP) is a promising low-carbon power generation option. Under this new planning background, this paper formulates an integrated generation and transmission network expansion planning model, in which the operating mechanisms of CCPP is taken...
Nowadays, advanced metering infrastructure allows us to record building energy consumption at much higher resolutions. This paper presents the methods for building load profile analysis and forecast using the 15-minute data collected at a substation feeder at the Centennial Campus of North Carolina State University from May 2012 to April 2014. Building load signatures for benchmarking building load...
The stochastic nature of wind power brings about large ramp events and poor prediction accuracy, which challenges the secure operation of power systems. Several stochastic unit commitment and economic dispatch methods are proposed to handle the prediction error of wind power, but few of them have attended to the ramp events. Therefore, this paper elaborately discusses the necessities to account for...
This paper provides 240 V ac air conditioning load data collected during summer peak heat load in Austin, TX. Air conditioning load profiles are studied in high, one-minute data resolution over the course of a typical, representative work-week where both electrical power and power factor are displayed. While THDv is 3.35%, TDDI is more concerning at 11.17% due to odd harmonics out to the 9th order...
Primary open-phase faults on station auxiliary transformers(SATs) are characterized by the presence of voltage unbalance at the auxiliary equipment level that could lead to protective device tripping, increased motor acceleration times, overheating or failure to start critical safety loads, particularly in the nuclear power industry. The transformer primary to ground zero sequence impedance has a...
The paper presents the design of an output feedback based centralized, damping controller using partial right eigenstructure assignment technique. The algorithm exploits the extra degrees of freedom provided by multi-input-multi-output (MIMO) systems in partially assigning a few, selected eigenvectors in addition to corresponding eigenvalues. Singular value decomposition (SVD) is used for determining...
To improve forecasting accuracy for baseline load and load impact from demand response resources, this paper develops three innovative statistical models. These models are regression spline fixed effect model, fixed effect change point model and mixed effect change point model. The models developed are applied to forecast baseline load and load impact from air conditioning cycling demand response...
Increased integration of distributed energy resources (DER) depends on addressing a number of technical challenges, both on the planning side—the interconnection process—and likewise how the DER interacts with distribution operations. These two domains are obviously linked. This paper presents the results of the first phase of a project considering the testing and demonstration of DER and a real-time...
In the future, state-of-the-art wind generators (WGs) are expected to produce one of the largest amounts of renewable energy worldwide. Nowadays, wind DFIGs with integrated storage are regarded as the state-of-the-art WGs. In this paper, we propose a comprehensive methodology that aims to solve the problem of distributed coordination and control of state-of-the-art WGs. The goal is for a WF to generate...
Power sector capacity expansion models (CEMs) have a broad range of spatial resolutions. This paper uses the Regional Energy Deployment System (ReEDS) model, a longterm national scale electric sector CEM, to evaluate the value of high spatial resolution for CEMs. ReEDS models the United States with 134 load balancing areas (BAs) and captures the variability in existing generation parameters, future...
This paper presents the disturbance rejection of peak current-mode control for bidirectional Buck-Boost converter using slope compensation. The equivalent circuits and transfer functions are derived for the peak-current mode control using small signal modeling. In order to utilize the benefits of peak current-mode controller and eliminate its drawbacks, slope compensation has been added. The derived...
Metal Oxide Varistors (MOVs) are widely used in power distribution networks and electric loads and appliances in order to protect against lightning surges and transients overvoltages. Degradation and failure of the MOVs due to lightning surges are one of the concerns of surge protection designers that usually lead to overdesigned or ineffective surge protection. In this paper, more than 100 low voltage...
Wide Area Monitoring and Control (WAMC) of power grids is one application of emerging smart grid technologies. A key feature of smart grids is the use of two-way digital communication between Intelligent Electronic Devices (IEDs), and system operators and controllers. The performance and security of the communications network is critical in this application. This work developed an emulation of a communication...
The power management strategy in an MVDC based power system of all electric ship (AES) with Hybrid Energy Storage System (HESS) can greatly affect the energy efficiency of the system. Based on the analysis of power flow, the load characteristics, the power management objectives, constraints and the ease of implementation in MVDC power system, the battery and the super capacitor are considered as the...
N-1 security criteria is a key principle for distribution operation. However, it is hardly taken into account in modern distribution feeder reconfiguration models, which cannot satisfy security margin demands. To address this fundamental problem, this paper develops a new stochastic reconfiguration method for distribution network considering N-1 security and net loss. Firstly, three indexes-average...
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