The impact of capacity and location of multidistributed generator integrated in the distribution system on electrical line losses, reliability, and interruption cost

Abstract

The primary purpose of this article is to study the impact of distributed generator (DG) integrated into the distribution system in terms of electrical line losses, reliability and interruption cost. The single‐ and multi‐distributed generators (DG) under this study are connected to a 22 kV distribution system of the Provincial Electricity Authority (PEA) that is a part of Thailand's distribution system. Geographic information systems data, including the lengths of the distribution line and the load locations that are key parameters of PEA, are simulated using digital simulation and electrical network calculation program (DIgSILENT). In addition, the capacity and location of DG installed into the distribution system are considered. The system average interruption frequency index (SAIFI), the system average interruption duration index (SAIDI) and the interruption cost are assessed as reliability indices by comparing the SAIFI, SAIDI, and interruption cost of the base case (without DG) and the cases of single‐ and multi‐DGs connected to the distribution system. Moreover, the electrical line loss is considered in terms of active power line loss, which is also compared with the base case. The results can be summarized by focusing on the location of DG, the capacity of DG, the number of DG, the size of the load, and the distance to the load, which are factors capable of impacting the electrical line loss, SAIFI, SAIDI, and interruption cost. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1763–1773, 2015

Characteristics of Various Single Wind-Power Distributed Generation Placements for Voltage Drop Improvement in a 22 kV Distribution System

“…Previous studies have demonstrated that the presence of a DG system in the network has several advantages for distribution systems [13], such as an improvement in voltage stability [14], power quality [15,16], power loss reduction [17][18][19], and reactive power compensation [20]. In terms of system reliability, research has shown that optimal DG placement can improve the System Average Interruption Frequency Index and the System Average Interruption Duration Index in a distribution system [21]. The power system's reliability can also be improved when the DG system is located in a suitable location, which can benefit the utility and the customer from an economic perspective [22,23].…”

Impact on Protective Device Sequence of Operation in Case Distributed Generation Integrated to Distribution System

“…Simple protective devices are proposed and utilised on the radial distribution system, such as the overcurrent [6][7][8], reclosers [9,10], and fuses [11,12]. Losses of coordinated protective devices are concerned with the processes observed, such as loss of tripping, loss of action, and loss of trip command to another device [13,14]. However, the protection characteristics are applied to the distribution system, in which the operation has to be correctly performed and perfectly functional as per the conceptual providing.…”

Continuous Line Loss Calculation Method for Distribution Network Considering Collected Data of Different Densities

“…Therefore, the randomness and volatility of new energy power could cause more complex grid loss mechanisms and loss reduction problems [20]. References [21][22][23] analyzed the impact of DG access capacity and access location on distribution network line losses. The traditional line loss calculation method has some limitations in calculating the line loss for distributed networks with DGs.…”