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This paper analyses the effectiveness of voltage estimations used as a new control logic for a traditional 110/20kV Medium Voltage (MV) On-Load Tap Changing (OLTC) transformer in order to regulate over-voltages in a residential Low Voltage (LV) network. This study is carried out on a radial distribution feeder modelled in MATLAB and simulations are run for 24 hour periods. A number of cases were tested...
This paper proposes a two-stage stochastic dynamic economic dispatch model aiming at better managing system variability and uncertainty influenced by wind generation. Stochastic decomposition algorithm is proposed to solve the model in order to facilitate real-time application. The proposed method is tested on PJM-5 and RTS-24 systems and the results verify that the model inherits advantages from...
Reducing carbon emissions has accelerated the use of various renewable resources for electricity generation. Wind generation, in this context has seen increasing installations globally. Managing the intermittency of wind towards existing power system operation and control therefore becomes crucial. One effective solution is to predict the future values of wind power production. This paper focuses...
This paper develops and presents an adaptive market-based load shedding scheme that provides options for adaptive selection of loads in real-time. Therefore an ancillary market-based system where consumers as well as system operator have options to contribute to system security can be evolved. All existing load shedding schemes are based on system operator's assessment and emphasize system security...
In order to analyze the behavior of a MicroGrid (MG) before actual implementation, real-time digital simulation is an indispensable and beneficial tool. In this paper, real-time simulation of MGs is implemented using discrete real-time simulator, Opal-RT platform. Real-time performance of the MG along with voltage and frequency stability assessment after islanding is the main focus. To assess this,...
Phasor Measurement Units (PMUs) is being implemented for on-line oscillation monitoring due to its advantages of enabling faster sampling and accurately measuring phasor information. Many modal analysis algorithms can be implemented due to this. However, bad parameter tuning or sampling at inappropriate intervals, though satisfying Nyquist-Shannon Sampling Criterion, can result into inaccurately estimating...
This paper presents details of the behavior of doubly-fed induction generators that are operating at different operation points following system disturbances. Detailed models for doubly-fed induction machine are well known but study based on each individual unit in a wind farm during power system disturbances like fault is not that well reported. When the wind generators are spread over the wind farm,...
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