This paper proposes a method to quickly and accurately predict the dynamic response of a power system during an under-frequency load shedding scenario. Emergency actions in a power system due to loss of generation typically calls for under-frequency load shedding measures to avoid potential collapse due to the lack of time in which to correct the imbalance via other means. Due to the slow and r...

A microgrid is an eco-friendly power system because renewable sources are used as main power sources. In the islanded operation mode of a microgrid, maintaining the balance between power supply and power demand is a very important problem. In the case of surplus supply, decreased generation output and/or charge of distributed storages can be applied to solve the imbalance between power supply a...

This paper proposes a load shedding program for evaluating and distributing the minimum power to be curtailed required bring frequency voltage, after system was subjected heavy disturbance, allowable range each bus. The quantity of estimated restore system's frequency, taking into account turbine governor's primary control generators' reserve secondary control. Calculation review bus's voltage ...

A real-time two-way direct load control (TWDLC) of central air-conditioning chillers in 10 wide area is proposed to provide demand response. The proposed TWDLC scheme is designed to 11 optimize the load shedding ratio of every customer under control to ensure the target load to be 12 shed is met at every scheduling period. In order to overcome the load reduction uncertainties of 13 TWDLC, an in...

Enhancing continuous queries over data streams with temporal functions and predicates enriches the expressive power of those queries. While traditional continuous queries retrieve only the values of attributes, temporal continuous queries retrieve the valid time intervals of those values as well. Correctly evaluating such queries requires the coalescing of adjacent timestamps for value-equivale...

under the smart grid environment, demand response resources (drrs) are introduced as a virtual power plant to enhance power system adequacy. drrs often fail to reduce their load due to some external factors. in this paper, a reliability model of a drr is constructed as multi-state conventional generation units, where the probability, frequency of occurrence, and departure rate of each state can...

The droop mechanism is widely utilized in a stand-alone microgrid (MG) to regulate power-sharing among distributed generators (DG). However, over the years, phenomena are continually modified lessen deviation voltage and frequency parameters caused due classical droop. This study suggests computing coefficient for voltage–current (V–I) take into account proportional power distribution DGs. In g...

in this article, an effective method to control a power system during emergency conditions is presented. based on fuzzy linear programming (flp), a new technique is developed to solve the load shedding and generation reallocation (lsgr) optimization problem. the objective function consists of terms of load curtailments and deviations in generation schedules. the constraints are power system var...