Stand-alone power system

About: Stand-alone power system is a research topic. Over the lifetime, 8650 publications have been published within this topic receiving 192397 citations. The topic is also known as: Stand-alone photovoltaic power system.

Application of SMES and Grid Code Compliance to Wind/Photovoltaic Generation System

Abstract: This paper describes a study on the application of superconducting magnetic energy storage (SMES) and grid code compliance to a wind and photovoltaic (PV) generation system. When a grid operates under instantaneous outage or surge condition, the distributed generation systems such as wind and PV systems must remain connected to the grid during a certain period of time. Therefore, the distributed generation system should be able to operate under abnormal conditions, such as reactive power or current fluctuations, which can damage the system and critical loads. The SMES can significantly enhance the dynamic security of such distributed power systems due to its high energy density and quick response characteristics. In this paper, the SMES control strategies for a wind and PV generation system during a fault ride through condition are examined, and the dynamic performance of SMES is evaluated by a case study based on the PSCAD/EMTDC simulation.

Distribution Loss Allocation for Radial Systems Including DGs

Abstract: Due to the liberalization of the electricity market and the introduction of distributed generation (DG), the importance of distribution loss allocation (LA) has increased. This paper presents a new method for distribution power LA in radial systems. The proposed method, which is based on the results of power flow and considers active and reactive power flows of lines for LA, is composed of three steps. In the first step, starting from the source nodes (i.e., the nodes whose generation is more than their load), the power loss allocated to all nodes is calculated and then the power loss allocated to the loads connected to each node is obtained. In the next step, the total power loss is allocated to the nodes in order to calculate the power loss allocated to the DGs based on the results of this step. In contrast to the previous step, in this step, allocating power losses to the nodes starts from sink nodes, which are the nodes whose load is more than their generation. In the final step, normalization is executed. The application of the proposed method is illustrated on two distribution feeders, and the results are compared with other methods.

Design of an off-grid hybrid PV/wind power system for remote mobile base station: A case study

Abstract: There is a clear challenge to provide reliable cellular mobile service at remote locations where a reliable power supply is not available. So, the existing Mobile towers or Base Transceiver Station (BTSs) uses a conventional diesel generator with backup battery banks. This paper presents the solution to utilizing a hybrid of photovoltaic (PV) solar and wind power system with a backup battery bank to provide feasibility and reliable electric power for a specific remote mobile base station located at west arise, Oromia. All the necessary modeling, simulation, and techno-economic evaluation are carried out using Hybrid Optimization Model for Electric Renewable (HOMER) software. The best optimal system configurations namely PV/Battery and PV/Wind/Battery hybrid systems are compared with the conventional stand-alone diesel generator (DG) system. Findings indicated that PV array and battery is the most economically viable option with the total net present cost (NPC) of $\$$57,508 and per unit cost of electricity (COE) of $\$$0.355. Simulation results show that the hybrid energy systems can minimize the power generation cost significantly and can decrease CO2 emissions as compared to the traditional diesel generator only. The sensitivity analysis is also carried out to analysis the effects of probable variation in solar radiation, wind speed, diesel price and average annual energy usage of the system load in the optimal system configurations.

LV distribution network feeders in Belgium and power quality issues due to increasing PV penetration levels

Abstract: In this paper, the impact of residential distributed energy resources (DER) on the power quality is investigated in four feeder types of the electrical LV distribution network in Flanders, Belgium. The investigated power quality issues are over-voltage, under-voltage and unbalance. The results of the simulations are discussed in detail. The paper leads to an estimation of the compliance to the power quality standard EN 50160, and a summary of issues in the distribution grids when increasing the amount of DER.

Vanadium redox battery energy storage and power generation system incorporating and optimizing diesel engine generators

Abstract: A power generation system includes a vanadium redox battery that interfaces with a control system to optimize performance and efficiency The power generation system may include one or more wind turbine generators and one or more diesel fuel generators The control system manages the vanadium redox battery's absorption and power generation to control system stability and system frequency The control system further manages the operation of the wind turbine generators and diesel fuel generators to control system stability and voltage