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Due to the uneven geographical distribution between load and wind power, currently it is difficult to integrate the large-scale wind power into the State Grid in China. There are significant wind curtailments for wind farms due to system restrictions. This paper proposes a new way of utilizing wind power, i.e. in-situ consumption, as an alternative to the costly development of long-distance transmission...
In this paper, we present a mixed-integer formulation with nonlinear production functions of the day-ahead hydro unit commitment problem for hydro-dominant power systems. The objective is to minimize unit startup and shutdown costs and maximize water use efficiency in the daily operation of multiple hydro plants. Determination of hourly generation dispatches and unit configurations is subject to reservoir...
The boost in intermittent renewable generation increases the constraints on the transmission lines, including the interconnections between neighboring countries. This rises the concerns on the security of supply in the power systems. In addition it damages the efficiency of the electricity market.The modification of the bidding area configuration is often considered as a solution to manage this problematic...
Nowadays, the promotion of flexibility in power systems is crucial to integrate non-manageable Renewable Energy Sources into the grid, mainly due to both variability and uncertainty issues. A wide range of strategies are currently available to provide suitable alternatives depending on the characteristics of each solution. According to previous contributions, these solutions can be classified into:...
The prospects of Electric Vehicles (EVs) in providing clean transportation and supporting renewable electricity is widely discussed in sustainable energy forums worldwide. The battery storage of EVs could be used to address the variability and unpredictability of electricity produced from renewable energy sources like wind in power systems. The EV batteries could be used to charge during periods of...
Micro-Combined-Heat-and-Power-Plants (μCHP) are one of the key technologies for the energy transition due their ability of a joint production of electrical and thermal energy. By combining and coordinating μCHP plants in a Local Virtual Power Plant (LVPP) the benefits of μCHP can be increased. With the hierarchal layer architecture it is possible also to include restriction of the electric grid in...
This work aims to describe the implementation of a renewable energy based Microgrid test site facility at the University of Genova (Italy) and to depict the advanced functionalities there implemented within the national supported project Smartgen. The developed advanced Distribution Management System (DMS) is based on a Supervisory Control And Data Acquisition (SCADA) system for the remote monitoring...
Premiums for renewable energy are being reduced as a consequence of the world economic crisis. This paper models the trading of the energy generated by a photovoltaic generator. The problem is solved through stochastic mixed integer linear programming where the objective function aims at maximizing the profit of selling the photovoltaic production in the day-ahead market. The model is tested without...
With the haze weather happening more frequently especially in developing countries, the air quality problem is attracting increasing attention. As a major source of air pollutants emission, the electricity industry is expected to conduct environmental-friendly power system planning and operation. Traditionally, the total pollutants emission is considered. However, it is well identified that the geographical...
The impact of introducing distributed energy resources at the low voltage side of the distribution grid is currently raising new challenges for utilities. In particular, the high penetration of photovoltaic panels (PVs) in radial grids is increasing the active power losses in the branches and the voltage level at some of the nodes. Principally nodes next to PV array installations. This paper presents...
The production scheduling of combined heat and power plants is a challenging task. The need for simultaneous production of heat and power in combination with the technical constraints results in a problem with high complexity. Furthermore, the operation in the electricity markets environment means that every decision is made with unknown electricity prices for the produced electric energy. In order...
Recently, new standards and incentives are spreading the installation of energy storage systems (ESSs) to promote, inter alia, the renewable energy sources (RES) penetration. ESSs can be used for supporting producers and distribution system operators to give more flexibility to the grid in terms of dispatching capability of RES, load shifting, peak shaving, ancillary services. This paper proposes...
This paper presents a two-step modified priority list (MPL) based mixed integer linear programming (MILP) method for improving the computational speed of unit commitment (UC) programs while preserving optimality. In the first step, the heuristics of UC results for a given generation fleet are investigated to develop the MPL. A subset of the generators are determined to be online (committed) or offline...
This paper presents a method to build the optimal energy management for grid connected microgrid which comprises the PV system and battery energy storage system (BESS). The objective is to minimize the cash flow of the system as well as to the maximum of net power import from the main grid. The constraints are given by the power balance between the production and consumption, and the capacity of each...
As part of the recently completed National Offshore Wind Energy Grid Interconnection Study (NOWEGIS), potential sites for 54 GW of offshore wind for interconnection into the US grid were identified based on lowest levelized cost of energy. Significant offshore wind energy has the potential to create steady-state congestion for the transmission grid near the interconnection points. Based on 2030 Summer...
The increasing level of Dispersed Generator (DG) connected to the distribution network lead to think about new integration solutions. In this paper, three decentralized control strategies are investigated and compared on a network. The three strategies are: local reactive power compensation, voltage tracking mode, and a mix of these two strategies. Losses and grid congestions will be the key factors...
To remove entry barriers for fast ramping resources, MISO introduced a market resource type called short-term stored energy resources (SER) and implemented performance-based two-part regulation reserve compensation. This paper presents an AGC enhancement proposal to better utilize fast responding capabilities of fast ramping resources to further incentivize new resources to enter into the regulation...
This paper focuses on a wind power forecast monitoring system for the need of a Transmission System Operator, using a case of Finland as an example. Wind power monitoring tool development was done closely with the operators from the TSO's control room to make sure all information needed for system operation was captured. The system operators highlighted the need for simple graphical views, with warnings...
This paper incorporates the stochastic day-ahead security-constrained unit commitment (DASCUC) within a multi-timescale, multi-scheduling application with commitment, dispatch, and automatic generation control. The stochastic DASCUC is solved using a progressive hedging algorithm with constrained ordinal optimization to accelerate the individual scenario solution. Sensitivity studies are performed...
High penetration of wind generation causes concerns regarding the frequency stability if wind plants do not provide inertial response. Extensive research has been conducted to investigate the design of controller to facilitate wind plants to provide synthetic inertia. However, the economic value of synthetic inertia provision from wind plants has not yet been understood. This paper develops a methodology...
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