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The main negative factors of urbanization are both, environmental problems (pollution of the urban environment, increase of building density, decrease of the green area, etc.), and the destructive influence of the big city on human health (emotional discomfort and stress among inhabitants, mental overloads leading people to alienation from the urban environment, etc.). In the article a new hybrid...
The paper uses daily historical data on electricity prices in the Latvian segment of Nord Pool power market in combination with wind speed measurements conducted in the north-western part of the country in order to perform revenue forecast for a wind power generator park and access the economic feasibility of such projects in Latvia. The forecast of revenues is based on two stochastic differential...
In this paper, power-flow calculation simulator with its visualization function is proposed and implemented. Generally, it is necessary to prepare a text file, which describes bus systems with generators and loads, which is one of the barriers for power-flow simulation. The proposed simulator has a function of automatic generations of IEEE common data format file from user-drawn power-system diagram...
This paper presents a model-based control technique to provide the contribution of wind power generators to primary frequency regulation in electric power systems. Models of individual wind power generators and wind farm (WF) as a whole are presented and the proposed control strategy is detailed. It consists of a central controller, a central Kalman filter (KF), and some local KFs, one for each wind...
The paper presents a study for implementing a brake sequence for a small wind generator for regimes that exceeds the rated values. Considering data from a real wind generator, two scenarios are presented: first, during a strong wind gust both the electrical and the mechanical brakes are coupled and, for the second case, a fault in the permanent magnet synchronous generator (PMSG) is caused. This study...
This paper proposes a new methodology for evaluating the probabilistic reliability of a grid constrained composite power system including wind turbine generators (WTG). The proposed model can consider capacity limitations and transmission line unavailability. The importance of renewable energy sources has been growing at a rapid rate due to environmental concerns. In particular, wind energy is one...
This paper proposes a new methodology for evaluating the probabilistic reliability of a grid constrained composite power system including wind turbine generators(WTG). The proposed model can consider capacity limitations and transmission line forced outage rates. The importance of renewable energy sources has been growing at a high rate as a result of being environment friendly. In particular, wind...
In this paper we develop a model of combined heat and power (CHP) dispatch for the system consisting of both thermal generators and wind turbines. In this model, the probability of stochastic wind power is included in the constraint set. This approach avoids the probabilistic infeasibility caused by using the average of random variables. The effects of wind speed on the generated power are investigated...
The energy shortage and environment pollution is attracting more and more attention with the social development. Hence it is important to develop new energy and renewable energy that are bio-energy, wind energy, solar energy, small waterpower, tide energy, terrestrial heat energy, and hydrogen energy and so on. The research of distributed power system with the solar and wind power is the leading domain...
This paper describes generation maintenance scheduling in an oligopolistic environment as a strategic decision. Maintenance decisions in an oligopolistic electricity market have a strategic function, because GENCOs usually have impacts on market prices through capacity outages. The main contribution of this paper is modeling a game theoretic framework to analyze strategic behaviors of GENCOs. Each...
In order to get the maximum power from the wind, the variable-speed turbine should run at different speed when wind speed changes.The dynamic characteristics of the control system must be properly defined and designed to achieve satisfactory generated power quality and system security, availability and reliability. Therefore great attention has to be kept in the theoretical design task, as well as...
In order to analysis the effect of the integrated wind farm in the power system probabilistic production simulation, a new model of the wind farm output power considering multi-wake effect is established according to the probability distribution of the wind speed and the characteristic of the wind generator output power. Compared with the individual wake effect model, this model takes the wind farm...
This paper presents a methodology for incorporating the wind hourly behavior into operation simulation and transmission planning within a hydrothermal system framework. A wind power model to obtain wind speed time-series for the whole planning horizon is applied based on historical data. A simulation program based on SDDP (stochastic dual dynamic programming) for the optimum operation of a generation-transmission...
The worldwide rapid increase in wind energy conversion-based generation necessitates additional study of the economic implications of wind plant integration. Market-based economic evaluations provide meaningful insight into the effects of integration on energy prices, revenue and revenue components to various market participants. To date, the methodologies for the modeling and evaluation have been...
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