Review on reliability improvement and power loss reduction in distribution system via network reconfiguration

Improving distribution system reliability calculation efficiency using multilevel Monte Carlo method

“…In the proposed study, system performance indices SAIFI, SAIDI, and CAIDI will be calculated. Based on Equations and , other distribution reliability indices such as ASAI, EENS and AENS could also be easily calculated The system performance indices SAIFI, SAIDI, and CAIDI are determined on levels and .…”

A two‐stage approach to shunt capacitor‐based optimal reactive power compensation using loss sensitivity factor and cuckoo search algorithm

“…Distribution systems, more often than not, are operated in radial configuration, although structured in mesh topology . Radial operation of distribution systems boosts efficient coordination of protection schemes, reduces short circuit current fault level, makes trouble‐shooting of faults easier and permits lengthy extension of distribution feeder lines . Voltage at the distribution end of power systems is comparatively lower compared to the magnitude of distribution current which is substantially higher .…”

“…Research findings had shown that the effects of the foregoing scenarios had translated to severe real power losses of about 13% with respect to total generated power and, by extension, lowered its fidelity in meeting up with the basic requirements of ideal distribution systems, which are: appropriate voltage magnitude, sustainable reliability, and adequate availability of power subject to demand . Works of several other researchers have also established that 80% interruption to stable availability of power is as a result of unhealthy disturbances at distribution sections of power systems, while other scholars tagged distribution systems as the prime engineer of outages in power systems . Suffice to point out that consumers at the farther end of distribution substations are known, over time, to experience severe voltage magnitude violations on daily basis and as a consequence, many of the sensitive electrical equipment/loads connected are unavoidably mired from executing their statutory function satisfactorily .…”

“…One of the relatively less expensive approaches that have been employed over time is the use of shunt capacitors among other approaches . Shunt capacitors are local reactive power compensators capable of improving substantially system aggregate performances such as power factor improvement, sustenance of voltage levels within the statutory limits and releasing of feeder capacity not only to carry additional loads but also to shoulder supplementary loads along the route of other feeders for the same amount of maximum permissible voltage drop and energy loss . Shunt capacitors compensate the lagging reactive power by diminishing both the line currents and reactive power demand even up to generation equipment and as a consequence, line losses and loadings become reduced in substation transformers, transmission lines and distribution lines …”

Modified branch exchange reconfiguration of active distributed network for simultaneous loss reduction and power quality improvement

“…A multi‐objective network reconfiguration in parallel with renewable DGs sitting and sizing for minimizing active power loss and annual operation costs has been conducted in Hamidal et al Another similar multi‐objective method for optimal network reconfiguration as well as reactive power dispatches of distributed generations has been proposed to improve the network performances by using nondominated sorting particle swarm optimization . The methods, which have been utilized to reconfigure the network for enhancing reliability and reducing losses, have been compared in Sultana et al Distribution network reconfiguration based on maximizing reliability by using the binary particle swarm optimization (BPSO) search algorithm in Amanulla et al and mixed‐integer second‐order conic programming (MISOCP) in López et al have been accomplished.…”