Most studies in relay coordination have focused solely on coordination of overcurrent relays while distance relays are used as the main protection of transmission lines. Since, simultaneous coordination of these two types of relays can provide a better protection, in this paper, a new approach is proposed for simultaneous coordination of distance and directional overcurrent relays (D&DOCRs). Al...

The wind turbine (WT) terminal overvoltage during grid voltage swell events may result in tripping the WT and consequently threaten secure operation of large-scale farms (WFs). In this paper, an optimal coordination droop control adaptive model predictive (MPC) scheme is proposed to enhance high-voltage ride-through (HVRT) post-event recovery WFs. During HVRT, reactive power reference generated...

An established tool for the assessment of motor performance in children with developmental coordination disorder (DCD) is the Movement-ABC-2 (M-ABC-2). The Zurich Neuromotor Assessment (ZNA) is also widely used for the evaluation of children's motor performance, but has not been compared with the M-ABC-2. Fifty-one children (39 males) between 5 and 7 years of age with suspected DCD were assesse...

PURPOSE This study aimed (1) to compare the skeletal maturity and activity participation pattern between children with and without developmental coordination disorder (DCD); and (2) to determine whether activity participation pattern was associated with the skeletal development among children with DCD. MATERIALS AND METHODS Thirty-three children with DCD (mean age: 7.76 years) and 30 typicall...

An efficient energy management scheme for a standalone hybrid AC/DC microgrid (HMG) has been proposed in this paper. Energy is challenging task, because of the involvement distributed resources (DERs) which are intermittent nature. The may therefore, undergo mismatch demand and supply, when either generation or load varies. This power result into DC bus voltage deviations sometimes these be out...

Considering that the AC–DC hybrid microgrid (HMG) is connected to low-voltage distribution network (DN) where voltage faults occur most commonly, fault ride-through (FRT) capability and power quality performance of HMG under abnormal DN conditions have become a critical issue. In this paper, decentralized coordination control scheme based on an improved topology proposed for grid-interactive gu...

in this paper, the performance of two types of facts devices in order to enhance the power system static voltage stability has been investigated. these devices include static var compensator (svc) and thyristor controlled series capacitor (tcsc). the modeling of the single machine infinite bus (smib) and aforesaid devices has been made up in steady state mode with disregarding of the generator ...

Directional overcurrent relays (DOCRs) are widely used to protect power systems. For optimal coordination of DOCRs, several techniques have been proposed to solve this problem. A common way of optimal coordination of DOCRs is using evolutionary algorithms such as genetic algorithm (GA). In this paper, a novel strategy for DOCRs coordination is proposed. In the proposed strategy, a new objective...

power system blackouts have become a serious problem for electric utilities especially in recent years. different forms of system instability have emerged in recent blackouts, such as voltage instability and frequency instability. to counteract each form of system instability, special algorithms have been designed in the protection system, e.g. under frequency load shedding (ufls) and under vol...