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It is widely acknowledged that the value of a house is the mixture of a large number of characteristics. House price prediction thus presents a unique set of challenges in practice. While a large body of works are dedicated to this task, their performance and applications have been limited by the shortage of long time span of transaction data, the absence of real-world settings and the insufficiency...
Consider a microgrid with a hybrid collection of distributed energy resources (DERs) that include fossil, renewables and energy storage battery systems. Given the dynamic variability of the DERs in terms of power production, this paper presents an optimization approach for the optimal power dispatch in such a hybrid microgrid by taking into account amplitude and rate constraints on each DER. The constrained...
Due to the diversity of components, the multi-microgrid systems provide more optimization degrees of freedom for coordinated control of active distribution network among multiple sub-microgrids and various distributed generations within sub-microgrids. In this paper, a hierarchical energy optimization method for distributed system with multi-microgrids is proposed with multi-agents based on centralized-decentralized...
Economic load dispatch (ELD) is one of the main tools for optimal operation and planning of modern power systems. To solve effectively the ELD problem, most of the conventional calculus methods rely on the assumption that the fuel cost characteristic of a generating unit is a smooth and convex function, resulting in inaccurate dispatch. This paper presents the design and application of a new efficient...
With the increasing amount and type of connected microgrids in the near-term future power networks, how to optimize the operation of a multi-microgrid system efficiently and reliably has become essential for taking full advantage of the complex systems. In this paper, we propose a multi-timescale coordinated optimization strategy for hybrid three-phase/single-phase multi-microgrids. With the consideration...
The article is devoted to the long-term improvement of the Russian gas industry development model for the period of up to 2035. New approaches to forecasting gas production at major fields, transportation of pipeline gas and spot market gas purchases are being updated.
Efficient representation of data aggregations is a fundamental problem in modern big data applications. We present a formalization of compute-aggregate planning parameterized by the aggregation function.
One of the main issues that still emerging as the most complex fundamental problems in power system operation is Economic dispatch (ED). This paper presents the application of Fruit Fly Optimization (FFO) algorithm technique for solving ED problem. The FFO algorithm is applied to minimize the cost of generating units by allocating the most optimum value of real power for a specific generating unit...
This paper studies the problem of distributed economic dispatch for smart grids under heterogeneous time delays. We design a state predictor for each agent to compensate the effect of heterogeneous time delays. This predictor allows the agents to predict the missing states between two consecutive update times. Based on the predictor, we propose a distributed gradient-descent algorithm to locally update...
The operation scheduling is a crucial factor that can affect the economic and environmental benefits and operation reliability of the microgrids (MGs). However, widely used scheduling methods are lacking in the comprehensive consideration for the multi-objective (MO) property and robustness of the system operation. Also, the generated solutions might not diminish the disturbance of uncertainty under...
The hierarchical control structure, namely, primary, secondary and tertiary control, becomes the standard operation of islanded microgrid. However, due to the proliferation of renewable energy sources which fluctuate fast, the time scale separation of the secondary and tertiary control can make the operation of microgrid becomes less economic efficient. Therefore, we incorporate the economic dispatch...
In this paper, the Economic Power Dispatch (EPD) of the thermal power plants in Iraq is studied. The main goal of this study is to minimize the high fuel costs of the Iraqi power generation system by controlling the outputs for each generating unit via the optimization algorithms. Though the Iraqi network is composed of the total 31 thermal units, it is considered as a large-scale system, and the...
Recently the multi-energy network had attracted attentions, which includes electricity, heat and fuel energies. These energies should be traded in market dynamics to maximize total economic benefits. However, energy transmission constraints caused by heat and/or fuel network structure restrict trading with market transaction. So in this paper coordinated EMS based on negotiated transaction mechanism...
Beslenme; büyümek, gelişmek, sağlikli ve verimli bir şekilde hayat sürdürmek için gerekli enerjiyi ve besin öğelerinin her birini yeterli miktarda karşilayacak besin gruplarini ekonomik şekilde almak ve vücutta kullanmaktir. Bu nedenle bu çalişmamizda bireyin fiziksel, fizyolojik ve sosyalojik özellikleri üzerine, günlük enerji ihtiyaçlarini karşilayacak şekilde ve öğün öğün programli günlük optimum...
A multicriteria economic problem is considered: the basic production assets and the labor resources define a set of feasible solutions (alternatives); labor costs, costs of the basic production assets (to be minimized), and cost of the manufactured products (to be maximized) are objective functions. The production function with constant elasticity of substitution is used. The decision maker's (DM's)...
The transformation of today's grid toward smart grid has given the energy storage systems (ESSs) the opportunity to provide more services to the electric grid as well as the end customers. On the grid's side, ESSs can generate revenue streams participating in electricity markets by providing services such as energy arbitrage, frequency regulation or spinning reserves. On the customers' side, ESSs...
To keep the economic and reliability of microgrid is a hot issue. There is the problem of the uncertainty of renewable energy generation as wind turbine (WT) and photovoltaic (PV), so batteries as energy storage devices play an important role in ensuring the safety and reliability of microgrid, especially the islanded mode microgrid. In order to optimize the scheduling of microgrid, a model consisting...
In this article, a hypothesis about the suitable number of the Emergency medical stations (EMS) is pronounced. The hypothesis says, that addition or building another EMS station is meaningful only when the benefit does not fall below the average contribution which is calculated from the various options. To increase the availability of the intervention of the EMS, a larger number of the Emergency medical...
In this work, a job-flow scheduling approach for Grid virtual organizations (VOs) is proposed and studied. Users' and resource providers' preferences, VOs internal policies, resources geographical distribution along with local private utilization impose specific requirements for efficient scheduling according to different, usually contradictive, criteria. With increasing resources utilization level...
For hybrid three-phase/single-phase multi-microgrids, a tie-line power optimization strategy based on Stackelberg game considering three-phase unbalance is proposed. In this paper, a topology of hybrid three-phase/single-phase multi-microgrids and the three-phase unbalance constraint are firstly introduced; then the tie-line power optimization strategy based on a one-leader-multi-follower cooperative...
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