جستجوی مقالات مرتبط با کلیدواژه « بار حساس » در نشریات گروه « برق »

After extreme natural events like earthquakes, storms, and floods, the electrical distribution network may be isolated from the upstream grid. In such a situation, the electrical power of the upstream grid is lost and the available microgrids (MGs) are the only power sources. Since the power outputs of MGs are restricted, restoring all de-energized loads is impossible and restoring critical loads (CLs) becomes the most important concern of the distribution network operators. Therefore, in this paper, a new hour-by-hour restoration strategy for CLs restoration after a blackout is proposed. The desired objective functions include restored energy and switching operations. The proposed restoration strategy presents a restoration plan for each hour of the outage period. The efficiency of the proposed strategy is carried out on an IEEE 123-bus distribution network and the simulation results confirm the superiority of the proposed hour-by-hour restoration strategy over the other conventional restoration methods.

Having electricity with high quality is one of the more important aims in electrical systems. Disturbances in distribution systems can change voltage waveform. There are some methods to prepare high power quality for sensitive loads. In this research، we use “Dynamic Voltage Restorer” to compensate the harmful effects of disturbances on voltage. Since power systems sometimes have complicated dynamic behavior especially during faults; emotional self-tuning controller which is a powerful adaptive controller has been used. In order to improve the performance of this controller from point of view of power quality indices such as flash and sensitive load voltage THD، a new structure is proposed for this controller. Also by this controller، system has better performance during fault conditions. According to simulation results، this controller has better operation than both classical PI controller and emotional controller.