Stochastic framework for reliability enhancement using optimal feeder reconfiguration

Abstract

Optimal distribution feeder reconfiguration (DFR) is a valuable and costless approach to increase the load balance, reduce the amount of power losses, and improve the voltage of the buses. In this way, this paper aims to investigate the optimal DFR strategy as a proper tool to improve the reliability of the radial distribution networks. The idea of failure rate reduction is employed to see the effect of feeder current reduction on the reliability of the system more accurately. The objects to be investigated are system average interruption frequency index (SAIFI), system average interruption duration index (SAIDI), average energy not supplied (AENS) and total active power losses. The problem is then formulated in a stochastic framework based on the point estimate method (PEM) to handle the uncertainty effects. The feasibility and satisfying performance of the proposed method is examined on a standard IEEE test system.

Distributed Control in Hybrid AC-DC Microgrids Based on a Hybrid MCSA-ADMM Algorithm

“…Obviously, the energy exchange between subsystems is leveraged to improve the resiliency concept of the network in the distribute fashion. The voltage level of the AC MG is 12.66 kV and the data on the grid topology, impedances, load demand, can be found in [23,24]. The hybrid MG includes two MTs installed on buses 12 and 25 as shown in Fig.…”

Effective demand response and GANs for optimal constraint unit commitment in solar‐tidal based microgrids

“…In order to attend the DRP, Equations () to () are deployed to show the limited power demand of the load (), the total energy required in a specific time range (17), and the minimum up time for the dispatchable loads (). $$\begin{equation}PD_{dt}^{\min }{\zeta _{dt}} \le P{D_{dt}} \le PD_{dt}^{\max }{\zeta _{dt}}\quad \forall d \in D,\forall t\end{equation}$$ $$\begin{equation}\sum_{t \in [ \in ,\nu ]} {P{D_{dt}}} = {E_d}\quad \forall d \in D\end{equation}$$ $$\begin{equation}T_{dt}^{on} \ge M{U_d}({\zeta _{dt}} - {\zeta _{d(t - 1)}})\quad \forall d \in D,\forall t\end{equation}$$ Microgrid structure modelling …”

“…The recent progress in renewable energy resources could facilitate the way for the high penetration of renewable energy sources as a flexibility tool to the power grids. With a sharp focus on the high polluting fossil fuel-based units, the renewable energy concept has attained attractive progress in reducing the losses, mitigating the costs, enhancing the reliability and power quality, decreasing air pollutions, and improving the voltage profile [14][15][16][17]. Unfortunately, the high amount of uncertainty injected by the renewable energy sources affects not only the DRP but also the operation and management policies in the power system.…”

Co‐optimising distribution network adequacy and security by simultaneous utilisation of network reconfiguration and distributed energy resources

“…Network reconfiguration is represented as the action of changing the topological structure of feeders by intelligently changing the status of tie and sectionalising switches from open to close and vice versa, without altering the radial structure of the network. The reconfiguration must be done for a number of reasons, including loss reduction [6,7], voltage profile improvement [8,9], reliability enhancement [10,11], etc. With active DERs in the network, reconfiguration will become more complex especially if security is a concern.…”

“…major generation and/or transmission outage causing voltage instability. In Section 1, we pointed out that the previous work in the reliability enhancement of the network using reconfiguration [10][11][12][13][14][15][16][17]22], only focus on the adequacy aspect of reliability. Here we consider both aspects of DNAS to achieve a comprehensive reliability improvement.…”