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A growing amount of variable generation is being connected to the distribution network, where it is not directly monitored or controlled by the system operator. This introduces a greater degree of uncertainty into bulk system operations. For short-term operational planning tasks, such as the prediction of network congestions, it is becoming increasingly necessary to forecast demand/generation profiles...
With the recent development of advanced metering infrastructure, real-time pricing (RTP) scheme is anticipated to be introduced in future retail electricity market. This paper proposes an algorithm for a home energy management scheduler (HEMS) to reduce the cost of energy consumption using RTP. The proposed algorithm works in three subsequent phases namely realtime monitoring (RTM), stochastic scheduling...
The monitoring of distribution systems relies on a critical set of pseudomeasurements and a varying but low number of redundant measurements. In the light of the different refreshing rates of both types of information, this paper considers a state estimation model structured in two time scales. Possibilities and limitations of the proposed model are discussed, and illustrated on a real distribution...
The smart grid vision has resulted in many demand side innovations such as nonintrusive load monitoring techniques, residential micro-grids, and demand response programs. Many of these techniques need a detailed residential network model for their research, evaluation, and validation. In response to such a need, this paper presents a sequential Monte Carlo (SMC) simulation platform for modeling and...
Battery energy storage systems (BESS) are becoming a viable means for large commercial and industrial (C&I) customers to realize reliability improvements and service charge reductions. This paper investigates the operation and planning of customer-side-of-the-meter BESS that are simultaneously used for both purposes. For scheduling applications, a new multi-objective economic dispatch algorithm...
Maloperation of zone 3 element of distance relay during stressed system condition such as power swing, load encroachment or voltage stressed condition is one of the main reason of large disturbances in power systems. Improved protection technique for zone 3 can help to prevent such maloperation and thus more reliable power system can be envisaged. This paper proposes an algorithm that utilizes two...
Substations play an important role in power systems. The application of the IEC61850 standard changes the situation of the traditional substation greatly. The information in the intelligent substation is rich, but it is difficult for the operators to digest them in a short time without an effective assistant tool. A fault diagnosis method which uses the alarming information of the primary and secondary...
Nowadays, power companies are actively promoting the construction of power quality monitoring system (PQMS). There is a vital need to deal with the large amount of data extracted from PQMS. This paper proposes a novel method of fault location estimation based on the voltage sag records of PQMS. By this method, fault position and fault resistance can be estimated by particle swarm optimization algorithm...
Continued deployment of renewable and distributed energy resources is fundamentally changing the way that electric distribution systems are controlled and operated; more sophisticated active system control and greater situational awareness are needed. Real-time measurements and distribution system state estimation (DSSE) techniques enable more sophisticated system control and, when combined with visualization...
The adoption of on-load tap changer (OLTC)-fitted transformers in low voltage (LV) networks is increasingly being considered to mitigate voltage issues resulting from high penetrations of photovoltaic (PV) systems. However, depending on the corresponding voltage control strategy, tap operations can be significant, accelerating the ageing of the OLTC. This work assesses the performance of different...
The Static Security Assessment of power system is affected by the uncertainty of the power flow distribution introduced by renewable resources. In this paper, a fast contingency selection approach considering load and generation uncertainties is proposed. Firstly, a linearized interval power flow algorithm is developed for post-contingency simulation. Then, an interval number comparison method based...
In this paper, we regard the power quality evaluation method as research content. We construct the identity understanding matrix and difference understanding matrix by using the judgment matrix of analytic hierarchy process and the connection degree model of set pair analysis. Then calculate the weight of power quality indexes by utilizing the compatibility matrix method and entropy weight method...
In this paper, an I–V tracer which operates autonomously, with no need to be disconnected from its load, will be discussed. The current state of I–V tracers commercially available will be discussed and motivation will be provided for the online autonomous I–V tracer. Design of such an I–V tracer using the single-ended primary inductance converter (SEPIC) will be discussed, and simulation results of...
An integrated portfolio of wide-area real-time reliability tools is addressing one of the major recommendations from the most recent blackouts in North America's Eastern and Western interconnections: The lack of common, simultaneous, adequate and accurate reliability information during major disturbances. The functional specifications for the tools were defined through guidance provided by NERC reliability...
In smart grids, the deviation of frequency and phase angle serves as an important indicator of abnormal events, the detection of which is critical to maintain reliable and stable operations of the power grid. However, the high cost and low accessibility of current power grid monitoring systems restrict their large-scale deployment over highly distributed microgrids. In this paper, we present a practical...
In the power system, there probably exist some certain risks during the dispatching operation when it is determined by a fallacious recognition of system conditions. A risk assessment approach for dispatching operations is proposed. The risk of dispatching operations is defined as the overload or voltage violation induced after operations. A critical equipment search technique used for contingency...
In this paper, a new Distribution Management System (DMS) based on security region is proposed. First, the model and topological characteristics of Distribution System Security Region (DSSR) are both introduced. This new theoretic tool provides a chance to implement real-time security analysis and control for distribution systems. Second, this paper proposes and describes five security states for...
The need to increase situational awareness in power systems is more evident than before. Increased power system complexity and integration of intermittent resources have contributed to the emerging need to monitor power systems in real time. Real time contingency analysis can increase situational awareness by monitoring the power system in real time and alarming the operators of the impending problems...
The objective of this paper is to present and share experiences and challenges in Voltage VAR optimization (VVO) real time closed loop deployment at BC Hydro control center. VVO deployment at BC Hydro is focused to maximize energy savings and therefore the closed loop execution is required on continuous 24/7 basis. Several characteristic requirements for closed loop operation were integral for successful...
With the increasing complexity of the grid and increasing vulnerability to large-scale, natural events, control room operators need tools to enable them to react to events faster. This is especially true in the case of high impact events such as geomagnetic disturbances (GMDs). In this paper, we present a data-driven approach to building a predictive model of GMDs that combines information from multiple...
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