A Risk-Averse Approach for Distribution Grid Expansion Planning

Recent episodes of natural disasters have challenged the resilience of power grids. Adequate distribution grid planning that properly captures the risk aversion of the utility system planner is a key factor to increase the flexibility of distribution networks to circumvent these events. In this paper, we propose a methodology to determine the optimal portfolio of investments in lines and storage devices in order to minimize a convex combination between expected value and CVaR of operational costs, including energy not served, while taking into account the multistage nature of the energy storage management within this context. While the expected value of energy not served has been traditionally employed to tackle routine failures, we also minimize the CVaR of energy not served to address high-impact, low-probability (HILP) events. We illustrate the performance of the proposed methodology with a 54-Bus system test case.

Smart Dustbin Utility System using IoT

Several studies and reports of a smart dustbin are out there to reduce human efficiency and to make the city clean. Here, we will be using the idea of a smart dustbin using IoT and different sensors and work on it to make it even more effective. Each dustbin shall have the data of the distance and the filled percentage of all other dustbins, aligned to it, in its memory. When it’ll be filled up to 75% or 90%, which we’ll know by the Ultrasonic Sensor, it’ll send a signal to the municipality about its content. When the dustbin shall be 100% filled, it’ll send a signal to the municipality to empty it. The now brimmed dustbin shall display a message on the attached LCD of the nearest dustbin which is not full, along with the distance and the direction in which it resides. The dustbin calculates the closest distance from the data saved in the memory and at the same time checks if the other dustbins are filled completely or not. If both the conditions match, it displays the number and direction of that dustbin. This implementation is introduced so that people don’t dump their trash in front of the filled dustbin, rather find a nearby one. This framework helps to make the city clean in an effective way. Keywords: Ultrasonic Sensor; NodeMCU; Blynk; PHP; MySQL; IoT

Governmental Lodging and Recreation with The Approach of Tropical Architecture

Lodging and recreational activity are essential activities for training, often held at office of Pusat Pengembangan, Pemberdayaan Pendidik dan Tenaga Kependidikan (PPPPTK) Medan. Office of Pusat Pengembangan, Pemberdayaan Pendidik dan Tenaga Kependidikan (PPPPTK) Medan has had one building as a homestead, but as time progress, the demand for this homestead increase because of the increased activity in recent years. Therefore, the expansion of the homestead and recreational space design is vital to support the training activities. This homestead and outdoor recreation centre design use the methodology to solve problems using a qualitative approach and a quantitative approach by following the data and analysis of the surrounding environment as well as the established governmental building guidelines. The implementation of tropical architecture in the design makes it able to achieve efficient use of energy and be environmentally friendly. This can be seen in the mass concept, indoor concept, outdoor concept, structural concept, circulation system, and utility system. Also, this design blends with the local value of the surrounding environment by applying local wisdom.

A Comprehensive Survey on Different Control Strategies and Applications of Active Power Filters for Power Quality Improvement

Power quality (PQ) has become an important topic in today’s power system scenario. PQ issues are raised not only in normal three-phase systems but also with the incorporation of different distributed generations (DGs), including renewable energy sources, storage systems, and other systems like diesel generators, fuel cells, etc. The prevalence of these issues comes from the non-linear features and rapid changing of power electronics devices, such as switch-mode converters for adjustable speed drives and diode or thyristor rectifiers. The wide use of these fast switching devices in the utility system leads to an increase in disturbances associated with harmonics and reactive power. The occurrence of PQ disturbances in turn creates several unwanted effects on the utility system. Therefore, many researchers are working on the enhancement of PQ using different custom power devices (CPDs). In this work, the authors highlight the significance of the PQ in the utility network, its effect, and its solution, using different CPDs, such as passive, active, and hybrid filters. Further, the authors point out several compensation strategies, including reference signal generation and gating signal strategies. In addition, this paper also presents the role of the active power filter (APF) in different DG systems. Some technical and economic considerations and future developments are also discussed in this literature. For easy reference, a volume of journals of more than 140 publications on this particular subject is reported. The effectiveness of this research work will boost researchers’ ability to select proper control methodology and compensation strategy for various applications of APFs for improving PQ.

A New Algorithm for the Design of Site Utility for Combined Production of Power, Freshwater, and Steam in Process Industries

Site utility without a doubt is one of the major units in process industries that consumed a lot of fossil fuels and significantly emitted emission pollution. In this paper, a systematic procedure was proposed to optimal design and integration of the utility system based on a combination of targeting approach as process integration technique, exergetic, exergoeconomic, exergoenvironmental analysis associated with Life Cycle Assessment (LCA) and multi-objective optimization through Water Cycle and Genetic Algorithms. Total site analysis was performed to provide an essential understanding of the characteristics and interactions of the equipment in the site utility system. Also, it provides aiming for power production and the temperature of the boiler and each steam level with acceptable accuracy. Furthermore, the exergetic, exergoeconomic, and exergoenvironmental analysis was presented to declare the effects of irreversibility, economic, and environmental impacts matter on the system. The multi-objective optimization using Total Annualized Costs (TAC) as one objective function was conducted through STAR software, GA, WCA, the proposed approach using Multi-Objective Genetic Algorithm (MOGA), and the proposed approach using Multi-Objective Water Cycle Algorithm (MOWCA). The capability of the proposed procedure was applied for the site utility of the petrochemical complex. Results show by using the new procedure the optimum solution has been achieved by a significant reduction of computational time.

Performance analysis of real-time PSO tuned PI controller for regulating voltage and frequency in an AC microgrid

<p>In this study, a control strategy based on the self-tuning method and synchronous reference frame (SRF) with PI regulator is proposed to achieve optimum quality of power in an autonomous micro grid (MG). The MGS is based on multiple distributed generation (DG) connected with 120 kV power grid. The proposed system is first simulated with fixed gain values for PI controller which are not optimal for sudden changes in the system i.e. transition of MG to islanding mode, load variations. So, the particle swarm optimization (PSO) has been utilized for tuning of PI controller parameters which ensure flexible performance and superior quality of power. The principal parameters considered in this study are, regulation of voltage and frequency, steady-state and dynamic response and harmonic distortion, mainly when microgrid is islanded. The performance of PI and PI-PSO is compared in this study by simulating AC microgrid in the MATLAB/Simulink environment. Summarized results of the system are provided to authenticate viability of proposed arrangement. The proposed controller performs intelligently while regulating voltage and frequency of the MGS and utility system.</p><div> </div>