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This paper proposes a novel probabilistic transient stability constrained optimal power flow (P-TSCOPF) model to simultaneously consider uncertainties and transient stability for power system preventive control. While detailed wind generator model with rotor flux magnitude and angle control strategy is used to describe the dynamic behaviors of wind generators, uncertain factors with correlations,...
Large Scale 3D Terrain Generation is a hot and difficult problem in many applications, such as Geographic Information System (GIS), Virtual Reality (VR) and 3D games. The key issues of 3D terrain Generation are how to store massive terrain data and how to simplify terrain model. For the storage and management of massive terrain data, an organization approach based on terrain partition and tile pyramid...
Demand side management (DSM) is the planning, implementation and monitoring of those utility activities designed to influence customers' use of electricity in ways that will produce desired changes in the utility's load profile, especially for reducing the peak load. As a significant part of DSM, load management changes load profile by load shifting, load clipping, load translation and other methods...
Lots of inverter interfaced micro sources, rectifier loads and three-phase unbalanced loads exist in micro gird, whose character of harmonic source affects power quality seriously. For this reason, based on instantaneous reactive power theory, power decoupling control and current hysteresis control, two kinds of current type inverter control strategy, constant DC voltage control strategy and droop...
Considering the randomness of photovoltaic (PV) output and load, the paper proposes a new method to analyze PV power penetration limit based on probabilistically optimal power flow. The proposed model based on chance constrained programming, is a nonlinear programming model with multi-constraints which has random variables. It takes the maximal PV power capacity that can be accepted by power grid...
Focusing on combined cooling-heating-power cogeneration dispatching problem for microgrid with windphoto voltaic-gas mixed generation and exchange with the grid, this paper firstly presented an optimal energy dispatching model. Forecast errors of load, wind power and PV are modeled in probabilistic ways, the integrated forecast error is then transformed to the up/down constraints and ramping rates...
In aspect of capacity, wind power generation and traditional power generation is inner connected. The capacity credit is a convenient and effective way to compare these two different types of power generation. Capacity credit of wind power (CCOWF) is presented in this paper, as well as a calculation method of CCOWF based on probabilistic production simulation (PPS), this method is based on sequence...
With the development of modern electricity equipment, voltage dips may bring more and more economic losses, which need a proper method of evaluation. In this paper, a time varying quality loss function, utilizing the Tobit model, is used to predict economic losses due to voltage dips. This quality loss function is more flexible and closer to practical situation.
This paper briefly describes Dominion's use of pseudo-measurements for the enhancement of its state estimator solution. Beyond providing a basic definition of pseudo-measurements and their usefulness, this paper highlights the specific integration of pseudo-measurements into Dominion's EMS platform. The paper concludes with a brief caution on the use of pseudo-measurements and highlights possible...
Distributed generation (DG) technology has drawn increasing attention for its tremendous benefits to customers, utilities and the environment. Furthermore, microturbine based power generation has become the most promising DG for its excellent record of improving system stability and economy. In this paper we develop a complete mathematic model, which includes the microturbine, a permanent magnet synchronous...
In electricity markets, the network is expected to transfer more power to promote profit, but the transfer capability will be affected by uncertainties. In order to quantify the probability and consequence of these uncertainties, the theory of risk is proposed to assess the available transfer capability (ATC). The means clustering method is used to layer the ATC values considering the uncertainties...
The integration of a large number of wind farms will have a significant impact on the reliability performance of the electric generation and transmission systems. In this paper, an adequacy evaluation model of wind power integration in power system based on the sequential Monte-Carlo simulation approach is presented. This model is applied to simulate power system including wind power generation. Depth...
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