scholarly journals Simulation of multi-power composite electric tractor based on power fluctuation ratio

2021 ◽  
Vol 2125 (1) ◽  
pp. 012007
Author(s):  
Wenxiang Xu ◽  
Mengnan Liu ◽  
Liyou Xu
Keyword(s):  
Energy System ◽  
Battery Life ◽  
Power Model ◽  
Power Fluctuation ◽  
Load Fluctuation ◽  
Control Threshold ◽  
Battery Packs ◽  
Battery State Of Charge ◽  
Input Model ◽  
Single Power

Abstract All Combined with the characteristics of frequent abrupt load in the field operation of tractors, and aiming at the problems of single motor energy input and large fluctuation of battery state in the energy system of pure electric tractors, a power supply structure with multiple battery packs was proposed. A dynamic model considering real-time power and load fluctuation and a multi-power cooperative input model based on fuzzy control threshold logic rule based on power fluctuation ratio are established. Matlab and Simulink are used to simulate the model and compare it with the traditional single power model. The results show that when the speed is constant ploughing, the output power of the lithium battery of the multi-power cooperative input model is effectively compensated compared with that of the single-power model under sudden load. The average fluctuation ratio of rising power decreases from 5.8% / s to 2.7% / s, which realizes “peak clipping” and “slow peak” when the current fluctuates greatly. and then made the estimation of battery state of charge (SOC) more accurate, and prolonged the battery life.

scholarly journals A Multi-objective Scheduling Optimization Model for Hybrid Energy System Connected with Wind-Photovoltaic-Conventional Gas Turbines, CHP Considering Heating Storage Mechanism

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 425 ◽  
Author(s):  
Yao Wang ◽  
Yan Lu ◽  
Liwei Ju ◽  
Ting Wang ◽  
Qingkun Tan ◽  
...  
Keyword(s):  
Demand Response ◽  
Gas Turbines ◽  
Energy System ◽  
Objective Functions ◽  
Distributed Energy ◽  
Operating Income ◽  
Hybrid Energy ◽  
Multi Objective ◽  
Load Demand ◽  
Load Fluctuation

In order to meet the user’s electricity demand and make full use of distributed energy, a hybrid energy system (HES) was proposed and designed, including wind turbines (WTs), photovoltaic (PV) power generation, conventional gas turbines (CGTs), incentive-based demand response (IBDR), combined heat and power (CHP) and regenerative electric (RE) boilers. Then, the collaborative operation problem of HES is discussed. First, the paper describes the HES’ basic structure and presents the output model of power sources and heating sources. Next, the maximum operating income and minimum load fluctuation are taken as the objective function, and a multi-objective model of HES scheduling is proposed. Then an algorithm for solving the model is proposed that comprises two steps: processing the objective functions and constraints into linear equations and determining the optimal weight of the objective functions. The selected simulation system is a microgrid located on an eastern island of China to comparatively analyze the influence of RE-heating storage (RE-HS) and price-based demand response (PBDR) on HES operation in relation to four cases. By analyzing the results, the following three conclusions are drawn: (1) HES can comprehensively utilize a variety of distributed energy sources to meet load demand. In particular, RE technology can convert the abandoned energy of WT and PV into heat during the valley load time, to meet the load demand combined with CHP; (2) The proposed multi-objective scheduling model of HES operation not only considers the maximum operating income but also considers the minimum load fluctuation, thus achieving the optimal balancing operation; (3) RE-HS and PBDR have a synergistic optimization effect, and when RE-HS and PBDR are both applied, an HES can achieve optimal operation results. Overall, the proposed decision method is highly effective and applicable, and decision makers could utilize this method to design an optimal HES operation strategy according to their own actual conditions.

scholarly journals Allometry in Callinectes bellicosus (Stimpson, 1859) (Decapoda: Brachyura: Portunidae): single-power model versus multi-model approach

2018 ◽  
Vol 38 (5) ◽  
pp. 574-578 ◽  
Author(s):  
Guillermo Rodríguez-Domínguez ◽  
Sergio G Castillo-Vargasmachuca ◽  
Raúl Pérez-González ◽  
E Alberto Aragón-Noriega
Keyword(s):  
Power Model ◽  
Model Versus ◽  
Single Power ◽  
Model Approach

On Improving Battery State of Charge Estimation Using Bulk Force Measurements

2015 ◽  
Author(s):  
Shankar Mohan ◽  
Youngki Kim ◽  
Anna G. Stefanopoulou
Keyword(s):  
Estimation Error ◽  
Lithium Ion ◽  
State Of Charge ◽  
Force Measurements ◽  
Voltage Measurement ◽  
Linear Quadratic ◽  
Bulk Force ◽  
Battery Packs ◽  
Battery State Of Charge ◽  
Li Ion

Lithium-ion (Li-ion) batteries undergo physical deformation as their state-of-charge (SOC) changes. The physical deformation causes changes in the pressure (equivalently, force) applied at the end-plates of a constrained battery pack or module. This paper proposes the fusion of bulk force and battery voltage measurements to estimate the SOC in Li-ion battery packs. In this paper, using discrete Linear Quadratic Estimators (dLQEs), the advantage of using force measurements in addition to voltage measurement to improve SOC estimates is quantitatively studied through simulations. It is observed that including force measurements can decrease the mean and standard deviation of SOC estimation error by 50% in some SOC intervals.

Hybrid Renewable Energy Systems Sizing for Offshore Multi-Purpose Platforms

2019 ◽  
Author(s):  
Luis Recalde ◽  
Hong Yue ◽  
William Leithead ◽  
Olimpo Anaya-Lara ◽  
Hongda Liu ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy System ◽  
Simulation Software ◽  
Economic Feasibility ◽  
Solar Pv ◽  
Hybrid Energy ◽  
Farm Production ◽  
Hybrid Renewable Energy Systems ◽  
Perform Sensitivity Analysis ◽  
Battery State Of Charge

Abstract Integrating marine renewables and aquaculture is a complex task. The generated power of each renewable technology depends on its source cycle (wind, wave, solar PV), leading to periods of zero power production. On the other side, aquaculture farms require smooth and stable power supply since any power shortage can lead to the loss of the entire farm production. This paper illustrates the sizing of a hybrid energy system (wind,solar PV, energy storage) to power up the aquaculture farm. The sizing is based on available commercial technology and the system is mounted on a single multi-purpose platform. Reliability is improved by considering device redundancies. Such hybrid system has not been considered before for aquaculture farms. System rough sizing, based on simple online renewable energy calculators, is used to select existing renewable technologies and HOMER Pro simulation software is used to evaluate the technical and economic feasibility of the microgrid for all possible combinations of the technology selected and perform sensitivity analysis on wind turbine tower height, battery state of charge and solar PV panels reflectance. The optimisation is subject to combined dispatch strategy and net present cost.

scholarly journals Quo Vadis Smart Charging? A Literature Review and Expert Survey on Technical Potentials and User Acceptance of Smart Charging Systems

2019 ◽  
Vol 10 (4) ◽  
pp. 85 ◽  
Author(s):  
Julian Huber ◽  
Elisabeth Schaule ◽  
Dominik Jung ◽  
Christof Weinhardt
Keyword(s):  
Literature Review ◽  
Positive Impact ◽  
Cost Savings ◽  
Energy System ◽  
End Users ◽  
Battery Life ◽  
Domain Experts ◽  
Financial Benefits ◽  
Smart Charging ◽  
Quo Vadis

Uncontrolled charging of plug-in Battery Electric Vehicles (BEV) represents a challenge for the energy system. As a solution, recent studies propose smart charging to avoid grid congestion and to integrate renewable energy. While financial benefits for smart charging schemes are currently quite low, there are other objectives for smart charging. However, it is unclear for which objectives smart charging can be used most effectively and which arguments are most likely to convince end users of BEVs to use smart charging schemes. To fill this gap, we conducted a literature review of the premises and the objectives of smart charging and how they fit the end-user’s motivation to use such smart charging systems. To evaluate the results, we present findings of 16 domain experts who evaluated various statements on smart charging according to their technical correctness and their persuasiveness towards end users. The results show that experts consider those smart charging objectives as most persuasive towards end users which they consider technically correct. Moreover, cost savings and integration of renewable energies are rated highest on both scales. On the contrary, experts do not expect a positive impact of smart charging systems on battery life and rate it as not very convincing.

scholarly journals Commercial mechanism analysis and benefit evaluation of energy storage

2021 ◽  
Vol 271 ◽  
pp. 01002
Author(s):  
Wang Zhiqiang ◽  
Wang Xiaolong ◽  
Mao Yuyang
Keyword(s):  
Energy Storage ◽  
Reference Value ◽  
Energy System ◽  
Voltage Regulation ◽  
Mechanism Analysis ◽  
Energy Storage Devices ◽  
Power Fluctuation ◽  
Storage Devices ◽  
Benefit Evaluation ◽  
Energy Storage Technology

With the increasing proportion of renewable energy in the energy system, problems such as power fluctuation and difficulty in frequency and voltage regulation are aggravated. The application of energy storage can alleviate these problems, and reasonable commercial mechanism analysis and benefit evaluation can promote the adoption of energy storage technology by the society. In this paper, the commercial mechanism is divided into four dominant modes based on market subjects, the main application scenarios of each mode are given, and the dominant modes are compared from the perspectives of technology, economy and society. Finally, the benefit evaluation models of each application scenario are constructed. The content of this paper has a certain reference value for investors of energy storage devices.

scholarly journals The Solar Renewable Energy System Study with A Capacity of 1300 W Utilizing Polycrystalline Photovoltaic

2020 ◽  
Vol 6 (1) ◽  
pp. 005-011
Author(s):  
Armin Sofijan
Keyword(s):  
Power Plant ◽  
Solar Energy ◽  
Alternative Energy ◽  
Solar Power ◽  
Raw Materials ◽  
Energy System ◽  
Battery Life ◽  
Solar Power Plant ◽  
Solar Panels ◽  
Electricity Grid

Solar energy is one of the alternative energy that is environmentally friendly and cheapraw materials and available throughout the year as a substitute for conventional energy whose raw materials are getting thinner and have a bad impact on the environment such as air pollution, noise and hazardous waste for the environment over a long period of time, solar energy has great potential as an independent solar power plant, which offers solutions to provide electricity to meet electricity needs, especially in areas not yet covered by the electricity grid of the National Electric Company. The 1300 W solar power plant is planned to use polycrystalline solar panels with a capacity 100 WP, combined with battery components and inverters, it can generate AC current for daily electricity needs. The greater the electrical load, the faster the battery life. This research shows that it takes 60 polycrystalline solar panels for 12 hours, 26 Solar Chargers 15 A, 9 batteries with a capacity of 150 Ah, and 15 Inverters 1300 W.

scholarly journals Double Power Supplies and Cross-zero Clocks Lead to Low Noises and High Efficiency in Digital Integrated Circuits

2021 ◽  
Vol 2095 (1) ◽  
pp. 012001
Author(s):  
Tao Wu
Keyword(s):  
Integrated Circuits ◽  
Power Consumption ◽  
Power Supply ◽  
High Efficiency ◽  
Energy System ◽  
Power Supplies ◽  
Level Energy ◽  
Digital Integrated Circuits ◽  
Single Power ◽  
Ground Line

Abstract Double power supplies are widely used in analog integrated circuits for the sake of power export and dynamic ranges. By contrast, single power supply and the ground line are regular in digital integrated circuits so far. In this paper, it is shown that double power supplies with cross-zero clocks help decrease the power consumption and noises in digital integrated circuits. They are firstly explained in frequency domain and then by a three-level energy system.

scholarly journals PGS1, a new low cost and low power Portable Geo-physical Station “All in One”. Design and test

2020 ◽  
Vol 63 (Vol 63 (2020)) ◽  
Author(s):  
Antonio Costanza ◽  
Gioacchino Fertitta ◽  
William Yang ◽  
Giuseppe D'Anna ◽  
Claudio Chiarabba
Keyword(s):  
Seismic Station ◽  
Low Cost ◽  
Data Acquisition System ◽  
Battery Life ◽  
Monitoring Networks ◽  
Photovoltaic Panel ◽  
High Data ◽  
Dense Arrays ◽  
Battery Packs ◽  
Compact Design

PGS1 is a new compact portable seismic station, designed at INGV OBS and Earth Lab, that is specifically intended for the deployment of dense arrays of seismographs on-shore. With its low cost, compact design, high data-quality and long battery life, PGS1 is a perfect solution for seismic monitoring networks. PGS1 design is based on a solid polypropylene suitcase, containing a complete data acquisition system, two battery packs and a photovoltaic panel. The new Earth Lab 5s medium-period seismic sensor is included. The whole system meets the IP67 standard requirements both in transport and in acquisition configuration. PGS1 is normally equipped with one battery pack, one more pack can be added inside the suitcase achieving 40 days of battery life. The station is equipped with a photovoltaic panel, useful to extend the deployment length. Inside the suitcase, there are compartments where to store the seismic sensor, the photovoltaic panel and all the cables. Therefore, the station is very easy to transport.

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