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N-1 security criteria is a key principle for distribution operation. However, it is hardly taken into account in modern distribution feeder reconfiguration models, which cannot satisfy security margin demands. To address this fundamental problem, this paper develops a new stochastic reconfiguration method for distribution network considering N-1 security and net loss. Firstly, three indexes-average...
Under distorted grid conditions with high bandwidth, synchronous reference frame (SRF) Phase Lock Loop (PLL) is able to work properly but increased bandwidth introduces harmonics which affect the PLL output and SRF PLL is also not able to produce accurate phase information under distorted grid conditions. This paper suggests a new phase detection technique based on cosine look-up table (cLUT) using...
This paper presents an optimal coordinated operation framework for minimizing the overall electricity cost of distributed internet data center (IDC) microgrids, which consists of cost of purchasing power from main grid, the operation cost of onsite generations, and the cost of carbon emissions. With forecasted day-ahead and real-time locational marginal prices (LMPs), the proposed model could help...
There are various undergoing efforts by system operators to set up an electricity market at the distribution level to enable a rapid and widespread deployment of distributed energy resources (DERs) and microgrids. This paper follows the previous work of the authors in implementing the distribution market operator (DMO) concept, and focuses on investigating the clearing and settlement processes performed...
The microgrid reliability assessment is gaining notorious attention as distributed generation systems are being increasingly installed. The conventional approach to perform this analysis is by means of the Monte Carlo method which may lead to long-lasting simulations when elaborated models are considered. To reduce the overall simulation time, this paper combines a detailed analytical microgrid modeling...
This paper proposes a new fault location technique for EHV double circuit transmission lines using synchronized current and voltage measurements from both ends. Double circuit lines faces difficulties in fault location due to mutual coupling. Modal transformation is used to decouple the coupled transmission line equations. Fault detection and location indices in terms of modal components of measured...
In this paper, an extended-L (EL) index is considered as a voltage stability constraint in optimal power flow (OPF) which guarantees adequate voltage stability margin (VSM) for an electricity market solution. The EL-index uses a generator equivalent model (GEM) that has significant effect on voltage stability studies. Two important objective functions which are maximization of the social welfare and...
The disjoint feasible zones make the economic dispatch problem non-convex. The existed solving schemes either rely on random searching, or use additional auxiliary variables, or involve high nonlinearity. In this paper, a new method is presented to overcome the main drawbacks in existed schemes. Due to its simple structure, the proposed approach also has the advantage to expedite the implementation.
The paper proposes a framework for the selection of optimal configuration of line compensation devices, thyristor controlled series capacitors (TCSC) and conventional fixed series capacitors, for reducing the risk of subsynchronous resonance (SSR) in the network while maintaining required power transfer. The methodology developed in the paper is based on the robust risk evaluation of SSR that takes...
Multi-period optimal power flow (OPF) is a basic tool to achieve optimal operation of a power system with energy storages devices and renewable sources. A novel convex relaxation based decomposeition algorithm is proposed in this paper to solve the full AC multi-period OPF with energy storages and renewable sources. Based on alternating direction method of multipliers (ADMM), the original time-correlated...
Sen Transformer (ST) emulates an impedance in series with the transmission line and, in turn, allows the active and reactive power flows to change independently, meaning as desired. Traditionally, power flow control has been attempted with the use of a phase angle regulator (PAR), which can only regulate the phase angle of the line voltage and, in turn, allows the active and reactive power flows to...
This paper develops a correlation index for Anomaly Detection System (ADS) to detect and identify wide area measurement attacks at sub-transmission level. Inspired by forensic analysis, we study the pattern of measurement attacks at sub-transmission power systems by developing an index of correlated substation attacks. The attacking strategy is reconstructed as a one stage two-level optimization problem...
The low frequency AC (LFAC) transmission, in which a power system is operated at a low frequency, i.e., below 50/60 Hz, is superior to the conventional 60 Hz system in terms of power transfer capability. In addition, due to low operating frequency, the line reactance is reduced and thus voltage drops along the line are decreased. The low frequency transmission thus offers a higher voltage profile...
The problem of centralized scheduling of large scale charging of electric vehicles (EVs) with demand response options is considered. A stochastic dynamic programming model is introduced in which the EV charging service provider faces stochastic demand, convex non-completion penalties, and random demand response requirements. Formulated as a restless multi-armed bandit problem, the EV charging problem...
This paper proposes a novel TRansformation Under STability-reTraining Equilibrium CHaracterization (Trust-Tech) enhanced methodology for the solar energy prediction. This novel method is an ensemble of Trust-Tech-enhanced, group-based genetic algorithm (GA)-assisted SVM predictors. Several distinguished features of the proposed method are as follows: Firstly, feature selection algorithm is used to...
This work presents de-rating\degradation factors effect on photovoltaic (PV) module energy output. It studies the turbidity and the angular optical losses to facilitate a development of an index that evaluate the level of solar radiation degradation. It is performed in an algorithm that provides a solution of optical depth, solar incidence angle on tilted PV module, turbidity index, and angular losses...
The cyber physical system of power distribution system is prone to cyber attack. So, behavior of agents becomes an important issue in distributed control scheme. In this paper, modeling for misbehaving agents and leader follower pinning control scheme are studied. Further, a distributed control scheme based on agents' behavior is proposed. In this control scheme, misbehaving agents are not isolated...
Smart Electrical Utilization System (SEUS) is one of the most important components of smart grid (SG). It's crucial to evaluate the efficiency, safety and demand response capability of power users in SEUS. Three categories of power user evaluation (PUE) indices are presented from the aspects of energy efficiency, safety monitoring and demand response. Taking into account the uncertainty of the user...
A new uncertainty quantification (UQ) algorithm for the error analysis of solar power forecasting is introduced. In solar power forecasting, there is a strong need for lenders, operators, traders, and Virtual Power Plant (VPP) to evaluate the forecasting results provided by different forecast providers. The algorithm potentially evaluates the third party's forecast to increase the performance of VPP...
This article presents the impacts of different storage technologies, their size as well as their location on the economic dispatch of a distribution system. The participation of the storage in distribution systems is evaluated over a period of 24 hours using a radial reconfiguration of the network. In order to meet this objective, a stochastic mixed integer linear problem (SMILP) is proposed, where...
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