Results 31 to 40 of about 362 (143)
, 2023 近年来电池储能以其响应速度快、能量密度高等优点，在电力系统中发挥重要作用。为满足实际应用的要求，电池储能系统需要将电池或电池组并联从而达到较高的可用容量，但并联电池在实际中受内阻、容量、荷电状态 （SOC）等影响将出现电流不平衡现象，一定程度上制约了电池充放电电流和使用条件，影响了电池性能。针对并联电池组支路电流采集过程繁琐且状态估计复杂的情况，以电池的二阶等效电路为基础，结合回路电流法建立了并联电池组的仿真模型。模型能够根据锂电池的性能参数及状态方程实现并联支路电流的计算，进而估计并联电池组的状态 ...
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Dianci bileiqi, 2021 针对现有储能站动力电池逆变单元关键部位过电压保护手段的不足进行了分析,指出在直流叠加高频交流的特殊电压环境下,现有过电压保护装置应用中存在的问题,并对此提出了一种将TVS二极管正向与氧化锌避雷器复合组成的新型过电压保护方案,该方案在维持了既有氧化锌避雷器优点的同时,克服了其电容电流过大的弊病,为储能站等新能源应用领域的过电压防雷保护提供了新的思路。
杨欢红 +5 more
doaj
基于双向DC-DC变换器的串联电池组主动均衡电路 [PDF]
, 2023 针对单体电池串联成组使用时出现不一致性的问题，提出了一种基于双向DC-DC变换器的串联电池组主动均衡电路。使用双向DC-DC变换器将单体电池中的高能量输送到能量低的单体电池中，无需额外的存储组件来存储和传送能量，减少了能量损失，提高了均衡效率。根据电池开路电压（open circuit voltage，OCV）与荷电状态（state of charge，SOC）之间近似分段线性的关系，采用以电压和SOC双变量作为均衡策略，通过相互实时修正电压均衡和SOC均衡，使得电池组间能量动态趋于一致 ...
司少康, 朱富超, 胡治国
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全球能源互联网, 2018 中国“三北”地区可再生能源装机占比普遍超过30%，高比例新能源电力系统形态已经基本形成。传统新能源电站面对高比例新能源接入电网频率/电压的扰动，无法提供有效的主动调频/调压支撑能力，会导致电力系统惯性和阻尼降低，给电网的安全稳定运行提出重大挑战。中国国家电网公司于2016年在张北风光储电站启动建设首个用于大电网的虚拟同步机示范工程，探索虚拟同步机多种实现方式和技术路线的可行性与经济性，已经取得阶段性成果。文中针对风电、光伏单元式虚拟同步机的不同技术路线进行了对比分析 ...
葛俊 +6 more
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Capacity Sizing Method and Economic Analysis of Energy Storage in Substations Meeting N-1 Criterion of Main Transformers [PDF]
, 2023 [Introduction] In order to solve the problem of the short-term heavy load of main transformers in substations caused by the high peak load of the power grid with the relatively reasonable average-load-rate and increasing utilization hours of the ...
Huiling XIE +3 more
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Intelligent Construction System and Key Technology for Compressed Air Energy Storage Power Plant [PDF]
ObjectivesCompressed air energy storage (CAES) is a new type of energy storage system that utilizes the mutual conversion of electrical energy and compressed air potential energy to balance the fluctuation of power grid.
CHEN Fang +6 more
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Assessment Method for Health State of Li-Ion Batteries Based on Sparrow Search Algorithm [PDF]
, 2023 [Introduction] Accurate estimation of the Li-ion batteries' State of Health (SoH) is essential for future intelligent battery management systems. To solve the problems of poor quality of data features and difficulties in adjusting model parameters, this ...
Chao WANG +6 more
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Collaborative Control Method for Offshore Wind Farms with Friendly Access to Hydrogen Energy Systems During Typhoons [PDF]
, 2023 [Introduction] With the steady progress of the carbon peaking and carbon neutrality goals, more and more distributed renewable energy is connected to the power grid.
Enyan XIE +4 more
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Developing Flow Battery for Large Scale Energy Storage [PDF]
, 2006 介绍一种新近发展迅速的大规模蓄电技术——液流蓄电池。叙述了其原理和优势、国内外发展现况和关键技术;分析了其作为风能与太阳能发电的蓄能、电网调峰、用电大户自备电源的应用前景;提出了发展我国液流电池的意见、建议。This article introduces a fast-developing large scale energy storage technology-flow battery, narrates its principles, advantages, development status ...
杨裕生 +5 more
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, 2022 To counterbalance the reduction of system inertia with increasing renewable generation, the frequency response (FR) service markets in the UK have been reforming to enable procurement from diverse technologies including energy storage systems (ESSs). The
Campos-Gaona, David +4 more
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