Power-flow study

About: Power-flow study is a research topic. Over the lifetime, 8091 publications have been published within this topic receiving 155053 citations. The topic is also known as: load-flow study.

Power acceptability and voltage sag indices in the three phase sense

Abstract: The electric power acceptability curves are an empirical set of curves that represent the intensity and duration of bus voltage disturbances. These curves are discussed with regard to the energy delivered to the load, and alternatives for the assessment and measurement of bus voltage sags. Special attention is given to the three phase case.

Placement of FACTS devices in open power market

Abstract: The ongoing power system restructuring requires an opening of unused potentials of transmission systems due to environmental, right-of-way and cost problems which are major hurdles for power transmission network expansion. FACTS devices can be an alternative to reduce the flows in heavily loaded lines, resulting in an increased loadability, low system loss, improved stability of the network, reduced cost of production and fulfilled contractual requirement by controlling the power flows in the network. This paper suggests, first, the few optimal locations of FACTS devices and then determines the best optimal location in order to reduce the production cost along with the device cost. The allocation and requirement are also discussed. The effectiveness of the purposed methods is demonstrated on IEEE 14-bus system.

SimBench—A Benchmark Dataset of Electric Power Systems to Compare Innovative Solutions Based on Power Flow Analysis

Abstract: Publicly accessible, elaborated grid datasets, ie, benchmark grids, are well suited to publish and compare methods or study results Similarly, developing innovative tools and algorithms in the fields of grid planning and grid operation is based on grid datasets Therefore, a general methodology to generate benchmark datasets and its voltage level dependent implementation is described in this paper As a result, SimBench, a comprehensive dataset for the low, medium, high and extra-high voltage level, is presented Besides grids that can be combined across several voltage levels, the dataset offers an added value by providing time series for a whole year as well as future scenarios In this way, SimBench is applicable for many use cases and simplifies reproducing study results As proof, different automated algorithms for grid planning are compared to show how to apply SimBench and make use of it as a simulation benchmark

Grid-connected hybrid PV/wind power generation system with improved DC bus voltage regulation strategy

Abstract: The objective of this paper is to propose an improved dc bus voltage regulation strategy for the grid-connected PV/Wind power generation system. The proposed dc bus voltage regulation strategy can reduce the variation of the dc bus voltage and the size of the dc bus capacitor bank, significantly. Also, the change of the injected ac current amplitude will be moderate and the power quality of the utility can be improved. A 1.2 kW prototype system is built and tested to verify the feasibility of the proposed dc bus voltage regulation strategy. Hardware experimental results are shown to confirm the performance of the proposed dc bus voltage regulation strategy.

Real-Time Management of Power Systems With V2G Facility for Smart-Grid Applications

Abstract: Real-time application in power systems is a key to smart-grid realization. Maintaining accurate security information and monitoring the changing system state are necessary for real-time management of the modern-day power system. Smart-grid applications provide an excellent opportunity to better manage the voltage stability of the power system. Using intelligent electronic devices, it is possible to capture power system data, and give an instantaneous snapshot of the system status. The penetration of vehicle-to-grid (V2G) into the power system may introduce a high-level of volatility due precarious charging/discharging operations, hence emphasizing the need for a real-time management option. In this paper, a real-time monitoring diagnostic of the power system is presented. The system parameters for consideration are voltage profile, voltage stability, step voltage regulators (SVRs) operations, power, and energy loss. Economic studies are also considered. Results show that for a given V2G penetration level, three-phase and system-wide V2G integration results in an improved system performance, and economic operation of the power system than a one-phase V2G integration. Results also indicate that using V2G parking lots to inject reactive power to the grid at an optimal location can promise about 95% power/energy loss reduction (relative to power loss without V2G installed). The results are suitable for further applications of smart grids.