The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
California has adopted particularly ambitious goals for development and integration of renewable resources, reaching 20% by 2020 and 50% by 2030. Additional regulations require significant reductions in greenhouse gas emissions and elimination of once-through cooling at coastal power plants. In combination, California is experiencing major changes in its resource portfolio. The California ISO has...
This paper proposes a self-healing strategy for two neighboring islanded microgrids (MGs) that are connected together through a normally open interconnecting static switch (ISS). Each MG is expected to support the other during power deficiencies, which is facilitated by the developed self-healing agent. This agent operates based on either a centralized approach, when data communication system is available,...
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...
This paper studies the impact of utility-scale microgrids on day-ahead (DA) markets, proposes a procedure to manage microgrids in daily operations of a DA market, and provides a guidance in planning new microgrids. As new utility-scale microgrids are being planned and built, the cumulative capacity of microgrids in the U.S. is expected to double in five years. In a region with a significant power...
With a growing emphasis on energy efficiency and system flexibility, a great effort has been made recently in developing distributed energy resources (DER), including distributed generators and energy storage systems. This paper first formulates an optimal DER coordination problem considering constraints at both system and device levels, including power balance constraint, generator output limits,...
High-voltage, high-power dc transmission based on Modular Multilevel Voltage-Sourced Converters represents currently the best solution when system resilience, flexibility of control, reliability and availability are of essence. In Europe, such systems are currently being installed or considered as interconnectors between several synchronous zones or embedded into a synchronous zone. New concepts and...
To fulfill demand response to a grid's control command, electric vehicles (EVs) are usually managed via a virtual power plant (VPP), and how to manage the EVs for optimal response is a key issue. Such a problem is defined as an optimal tracking problem (OTP) in the literature, and an improved OTP model considering network constraints is studied in this paper. In order to circumvent the computational...
Demand Response (DR) seeks to involve end-use customers in modifying their electricity usage and to offer incentive payments to encourage lower electricity use at times of high prices. This paper addresses how smart charging of plug-in electric vehicle can be used to support efficient energy delivery and phase unbalance control in three-phase system, while improve DR by PEV owners' collaboration....
Electrical Power systems are going through a transition of increasing penetration of Renewable Energy Sources (RES) and growing transmission capacity between Asynchronous Areas (TBAA). Maintaining a reliable power balance is essential but most new RES and TBAA are not delivering Primary Frequency Controlled Reserves (PFCR) and not enhancing power systems Frequency Response Characteristics β. The issue...
The energy internet paradigm provides a platform to integrate and utilize multiple energy resources through advanced hardware interfaces, communication infrastructure and operational intelligence. In this paper, a robust energy management framework is proposed for dispatching multiple renewable energy resources including solar power, wind power and biomass generation, and flexible loads. In the framework,...
This paper presents three alternatives to database adequacy aiming at on-line dynamic security assessment. Usually, on-line data available at the control centers are not prepared to be directly used in dynamic simulations due to discrepancies between power system data models used in EMS' databases and power system analysis software (off-line). Challenges and requirements of such adequacy are initially...
The decrease in PV panel cost has globally increased the residential PV installations in the distribution grid. Studies have shown that high PV penetration can cause overvoltage, voltage deviation and reverse power flow concern in the distribution grid. To avoid the grid concerns, the utilities typically limit the PV penetration in the distribution feeder. However, the PV hosting capacity limits of...
Isolated grid (IG) usually has small inertia constant, and the primary frequency regulation ability of IG is limited. In addition, high penetration level of photovoltaic power plants (PV-PPS)integrated to IG deteriorate system inertial and primary frequency regulation ability. To ensure the stability of frequency, UC model considering dynamic frequency limit (DFL) is proposed in this paper, and PV-PPS...
Generator protection misoperations may intensify a disturbance or even lead the power system to a major outage, especially when it occurs in a large power plant. Additionally, the power system expansion changes the short circuit currents and, thus, from time to time the system requires a re-evaluation of protection coordination. In this paper, Itaipu power plant's modeling, analysis and coordination...
Renewable based distributed generators are being used extensively owing to the benefits they offer for both utilities and investors. With the spread of these DGs in power systems, A precise model that follows the stochastic behavior of wind or solar is crucial for power system planning and operation. This paper presents novel probabilistic models for wind and solar based generators. These models give...
The integrated energy systems (IESs), composed of deeply interdependent electric power systems (EPSs) and natural-gas systems (NGSs), are expected to play an important role in the transition to low-carbon sustainable energy systems. To facilitate the security assessment of IESs, this paper initially proposes the concept of IES security region. First, The security region of the IES is defined as a...
We present a framework for enabling Virtual Power Plants based on micro balancing events called Micro-Flex, along with an initial simulation evaluation in the context of an aggregated system of smart homes, including detailed models for electric vehicles, water heaters, and air conditioners, participating in the CAISO Energy Imbalance Market (EIM).
The variable generation from renewable energy sources makes them challenging to be integrated into electricity markets. Virtual power plant (VPP) is proposed to integrate various distributed energy resources (DERs) so as to participate into the electricity market as a single entity. In this paper, we investigate a VPP consisting of several thermal generation units and renewable generation units. An...
Data centers represent a large load for the grid, and the number of data centers are increasing at a high rate. The transmission network in the grid is becoming congested as a result of the load growth. Data centers have underutilized energy resources, such as backup generators and battery storage, which can be used for demand response (DR) to benefit both the electric power system and the data center...
This paper presents a machine-learning approach for regional photovoltaic (PV) power forecasting of up to 2 days ahead with hourly resolution. Physical PV power model is aggregated by geographical clusters and then summed for an entire ISO load zone. Numerical weather prediction (NWP) forecasts provide parameters, such as irradiance, temperature, barometric pressure, and wind speed, which are used...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.