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《Planning》2013,(6)
大规模发展分布式光伏发电有助于缓解能源危机,但随着分布式光伏发电的大规模接入,将对配电系统产生较大影响。阐述了光伏发电并网系统结构,结合分布式光伏发电特点和电网工程实际,设计出限制过电压条件下的光伏发电并网方案,提出光伏发电系统并网后直流与谐波分量的治理措施。实际运行表明,所设计的分布式光伏发电并网方案既能够保证接入点电压不越限,又能够有效减少占用线路走廊资源和电网调度、运行维护工作量。 相似文献
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随着对太阳能发电系统研究的深入及技术的不断发展成熟.建筑光伏一体化的分布式光伏并网系统不断在实际工程中得到应用。本文针对分布式并网光伏发电系统,总结了系统设计流程,对设计过程中的各个要点进行了详细分析并提出了需要注意的问题。文中提及的在实际光伏并网系统工程设计中的一整套设计流程及方法,具有一定的参考意义。 相似文献
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《Planning》2018,(7):30-31
针对分布式光伏并网配电网运行研究的问题,文章设计了一套分布式光伏并网运行仿真分析系统,由仿真平台和数据采集器构成。仿真平台搭建一个基于通用的IEEE30节点配电网模型及其参数的模拟电网,分布式光伏可接入设定节点。基于仿真系统,实现分布式光伏发电系统的监测与控制、电网的实时运行仿真、系统潮流计算、参数修改设定、灵敏度分析、数据保存与导出、用户管理等功能,研究分布式光伏并网运行情况及规律。文章为分布式光伏并网运行研究提供一种新的研究思路和实践探索。 相似文献
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叶小冬 《智能建筑与城市信息》2021,(1):101-102,109
文章针对小型分散式光伏发电系统在建筑供配电系统中的应用进行研究,介绍了光伏发电系统的分类、系统的组成,并结合工程案例,分别从并网模式、太阳能电池选择、逆变器选择、并网配电箱设置、防雷接地技术等方面介绍了实际应用中的关键技术,还通过理论计算,测算了实际项目中光伏发电系统应用产生的良好经济效益和社会效益. 相似文献
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大型集中并网光伏电站硬件设计要求及安全保护 总被引:1,自引:0,他引:1
随着传统能源的枯竭、太阳能光伏电源的推广应用和各国政府的大力支持,越来越多的国家已经开始有计划地推广并网光伏发电,主要是建设户用屋顶光伏并网发电系统和兆瓦级集中大型并网发电系统等,特别是建设地面安装的兆瓦级集中并网光伏电站。光伏电站初期投入较大,尤其是电站的硬件设备投资最大。而我们知道,在光伏发电系统的设计中做出的每个决定都会影口向造价,由于不适当的选择,可轻易地使系统投资成倍增加,因此必须依据正确的设计要求选择合适的硬件设备,另外应加强整个电站及人员的安全保护。 相似文献
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This paper presents a transformerless single-stage full-bridge inverter for a grid-connected photovoltaic system (GCPVS) and its performances based on power loss, efficiency, and total harmonic distortion for the conditions: (a) seasonal variations of inputs in the photovoltaic (PV) system, (b) variation of grid voltage, and (c) variation of carrier frequency and Modulation Index of sinusoidal pulse-width modulation of the inverter. A typical 2.8 kWp, 368 V nominal PV array-based GCPVS is modelled and simulated to evaluate proper load matching in Indian ambient and grid conditions prior to practical implementation. Detailed analyses on system powers, power losses, efficiency, and harmonic distortions as well as selection of parameters for the simulation model are presented. The impacts of penetrating PV power into electric grid are investigated in order to predict the possible unwanted consequences. 相似文献
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通过 RETScreen4软件仿真数据和实测数据对比,简要介绍光伏组件倾角、方位角、阴影和污物等因素对并网光伏系统发电量的影响,得出结论:光伏组件倾角对发电量的影响远大于方位角的影响;应结合场地条件合理选择组件安装方位角和倾角;尽量避免周围建筑和设施对组件的遮挡。 相似文献
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This paper demonstrates how the use of active or passive means only does not give the appropriate answers to a tropical design when considering housing. The author discusses about the idea of both modes of operation being used simultaneously or in parallel, and how this concept has been developed for one experimental building prototype in tropical areas of Brazil (Northeast region). Quantification is given through extensive parametric simulations which have been conducted using different environmental simulation programmes—TAS (EDSL, UK), ESP-r (ESRU, UK) and photovoltaic (PV)-Design PRO-G (Sandia Labs, USA). Thermal comfort levels along with energy use were assessed and compared, in terms of degree hours of overheating/under heating and cooling energy use. The prototype design has also taken into account the appropriate use of resources through sustainable design features: efficient use of energy, water and materials. The results have demonstrated that for regions such as the warm-humid tropics, the use of a mixed running strategy have optimized energy performance and provided better levels of thermal comfort in a much more effective way. For some cases, cooling energy savings up to 80% were feasible on a hybrid mode, where thermal comfort was improved up to 65%. It has also demonstrated the integration of energy efficiency and a PV grid-connected system, while enabling those daytime electrical needs to be accomplished by the photovoltaic component. 相似文献
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本文介绍了离网光伏电站的选址及设计原则,确定了电站、蓄电池组设计容量,并对光伏阵列进行了优化设计,为不同地区离网光伏电站提供了简单、实用的工程设计方法,为离网光伏电站优化设计提供算法支持与理论保障。 相似文献
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Ibrahim Odeh Yigzaw Goshu Yohanis Brian Norton Mohammed Alsoud Dina Odeh 《国际自然能源杂志》2018,39(5):467-476
Three-year, hourly averaged, field data have been analysed for eight installed photovoltaic (PV) systems. Correlations of PV array yield as a function of insolation have been developed using long-term field data considering PV as a part of system in which load affects its performance. Another scenario that considered infinite load like that for grid-connected PV system has been investigated and array yield correlations were obtained. Influence of ambient temperature and wind speed on PV array yield is investigated. 相似文献
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光伏建筑一体化作为分布式光伏电站的一种存在形式,越来越受到关注。分布式光伏系统接入配电网运营后,改变了传统电网的结构,从过去的无源电网转变为有源电网。由于光伏发电系统输出的电能具有间歇性、不稳定性等特点,必然会对所接入配电网的电能质量、潮流分布、短路电流、保护协调、孤岛效应、光伏逆流等方面产生不同程度的影响。根据国家电网公司颁布的《分布式电源接入系统典型设计》的要求,针对分布式光伏并网系统运行中存在的问题,提出了改进措施和具体的技术要求。 相似文献
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太阳能PV系统从军用到民用、从离网系统到并网系统已经走过了半个多世纪的历程,效率不断提高,技术日益完善,发电成本逐年下降。随着科技的发展,大规模利用PV技术进行太阳能发电已经蓬勃兴起,而大量分散型PV电源的入网又需要发展微网系统、智能电网系统和全球PV供电系统。 相似文献