共查询到20条相似文献,搜索用时 58 毫秒
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压缩空气储能系统可以有效减少因风能和太阳能随机性造成的弃风弃光现象,但其动态响应时间长,且存储规模配置不合理会影响其发展。为此首先提出液流电池与压缩空气储能组成混合储能系统解决并网型风光互补发电系统输出波动不稳定的问题;其次基于典型小时负荷、风力机发电功率和光伏发电功率,针对不同场景,以系统最大收益为目标函数,利用猫群算法优化压缩空气储能系统的容量配置;最后分析压缩空气储能系统的额定容量与额定功率对系统最大收益的影响,验证算法可靠性。结果表明,基于风力机与光伏系统的装机功率分别为20 MW和3.42 MW的场景,压缩空气储能系统容量配置为4 MW和46.5 MW·h时,其经济性最佳,每周可节约购电成本183 688.24元,周最大收益为30 543.86元。 相似文献
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以东北某风电场月出力实测数据为对象,通过分析该风电场的功率波动特性,提出了储能系统功率、容量配置方法。该方法以储能系统投资收益最大为目标,结合储能平滑风电出力效果,获取经济性最优的储能系统容量配置方案。结果表明,该优化配置方案在平滑风电功率的前提下,具有良好的经济效益,为风电场中配置储能系统、推进储能系统规模化应用提供了参考。 相似文献
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许庆祥滕伟武鑫柳亦兵梁双印 《储能科学与技术》2022,(12):3906-3914
为使风电场有功功率变化满足国家标准中有功功率变化限制的推荐值范围,采用飞轮储能系统平抑风电场有功功率输出。基于低通滤波方法,由飞轮储能系统响应风电场有功功率输出的高频成分,降低并网功率波动对电网一次调频的影响。通过建立不同截止频率和不同飞轮储能系统功率容量下的双层寻优模型,得到满足飞轮储能系统约束条件、风电并网有功功率变化要求和经济性指标的最优化飞轮储能系统容量。建立飞轮储能系统模型,仿真验证飞轮储能系统能够较好地响应功率指令,有效平抑风电功率波动。 相似文献
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运行层面的风电可信度研究在电力系统调度中发挥着重要作用.随着储能的普及,研究储能对风电可信容量的影响越来越有必要.本文首先给出了风电运行容量可信度的定义;其次,建立了不同发电机的可用容量模型和储能充放电模型;然后,基于上述模型,提出了考虑储能影响的风电运行可信容量评价方法;最后,通过IEEE 24节点算例,定量分析储能... 相似文献
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《可再生能源》2016,(1)
大容量储能系统理论上可抑制风电出力波动,但其经济性不足成为实践应用的巨大瓶颈。文章从含储能的风电系统优化经济调度角度出发,以含风储的电力系统总成本最小为目标,主要考虑了因储能补偿风电功率预测误差而减小的火电旋转备用容量折算成本、因储能补偿平抑风电出力波动而减小的火电旋转备用容量折算成本,储能补偿风电场弃风成本,储能补偿火电排污和环境治理成本,以联合提高风电预测精度和平抑风电波动满足国网规定标准为约束,构建含风储的电力系统优化经济调度数学模型,采用遗传算法针对新疆某含风电的地区电网加装储能进行了储能容量优化配置。仿真结果表明,所提储能容量配置占风电场装机容量的9.60%,经济性较好,方法有效可行,具有较好的应用前景。 相似文献
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《全球能源互联网(英文)》2021,4(6):608-618
Compensating for photovoltaic (PV) power forecast errors is an important function of energy storage systems. As PV power outputs have strong random fluctuations and uncertainty, it is difficult to satisfy the grid-connection requirements using fixed energy storage capacity configuration methods. In this paper, a method of configuring energy storage capacity is proposed based on the uncertainty of PV power generation. A k-means clustering algorithm is used to classify weather types based on differences in solar irradiance. The power forecast errors in different weather types are analyzed, and an energy storage system is used to compensate for the errors. The kernel density estimation is used to fit the distributions of the daily maximum power and maximum capacity requirements of the energy storage system; the power and capacity of the energy storage unit are calculated at different confidence levels. The optimized energy storage configuration of a PV plant is presented according to the calculated degrees of power and capacity satisfaction. The proposed method was validated using actual operating data from a PV power station. The results indicated that the required energy storage can be significantly reduced while compensating for power forecast errors. 相似文献
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《Energy》2005,30(11-12):2115-2127
\Superconducting Magnetic Energy Storage (SMES) is very promising as a power storage system for load leveling or a power stabilizer. However, the strong electromagnetic force caused by high magnetic field and large current is a serious problem in SMES systems. To cope with this problem, we proposed the concept of Force-Balanced Coil (FBC), which is a helically wound toroidal coil. The FBC can minimize working stresses by selecting an optimal number of poloidal turns. However, the winding of the FBC has a complex three-dimensional shape that can make the manufacturing of the helical windings difficult. To overcome this difficulty, a helical winding machine was developed. From winding tests, the possibility of the coil construction was demonstrated. Moreover, a small helical coil using high temperature superconductors was designed and fabricated in order to estimate the problems of helical winding technique through the experimental results with liquid nitrogen cooling. This paper describes the design condition of the Force-Balanced Coil in order to reduce structure requirements and proposes a solution to the problems of helical winding technique by using experimental devices. 相似文献
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近年来,中国和世界一直致力于发展储能技术,为电网运行提供调峰、调频、黑启动、需求响应支持,并帮助解决可再生能源间歇性、不稳定性、不可调节性等问题。本文回顾总结了国内目前评价储能技术常用的技术指标和经济效益指标。并站在能源可持续发展的角度介绍了基于“能量”成本评价储能技术的新理念及方法,阐述了基于‘能量’成本评价不同技术节能潜力的必要性,引入了全生命周期能源投入存储回报(energy stored on Investment,ESOI)这一新指标。ESOI比值越高说明该技术“净能量”越高,生产对能源依赖度越低。本文研究对比了不同储能技术的ESOI,结果表明以压缩空气储能(CAES)和抽水储能(PHS)为代表的物理储能技术的ESOI远远大于电化学储能,其中,过去常用的铅酸电池(PbA)的ESOI最小,只有2。 相似文献
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The acquisition granularity (time feature quantity) and sampling span (spatial feature quantity) of the data are the feature factors to analyze the active power of renewable energy power stations. According to the time and space characteristics of photovoltaic (PV) power stations, the acquisition granularity and sampling span calibration methods of PV output power based on data mining technology are proposed this paper. The initial range of the acquisition granularity is determined by analyzing the maximum‐order difference components of the PV output power. Through deeply mining the continuous change state of the PV output power, an acquisition granularity calibration method of the PV output power based on the multiobjective optimization model is proposed from time characteristics. The particle swarm optimization algorithm is used to solve the model to obtain the optimal the acquisition granularity of the PV power station. Through the analysis of the sample information entropy change trend of the PV output power, a sampling span calibration method of the PV output power based on the information entropy theory is proposed from space characteristics. The sensitivity analysis of the acquisition granularity and sampling span of the data to the capacity of energy storage systems is realized by the smooth control of the PV output power using first‐order low filters. The simulation tests of the annual history operating data at a PV power station with the installed capacity of 40 MW in China verify the validity of the provided methods. The simulation results show when the acquisition granularity takes 60 seconds and the sampling span takes 33 days, it can satisfy the accuracy of the required data of energy storage systems to realize the smooth control of the PV output power. 相似文献
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高比例光伏发电接入会对电力系统的稳定性等造成不利影响,而储能则被认为是消除这些影响的有效手段之一.本文从电力系统潮流的角度,分析了光伏发电对电力系统的影响,进而分析了储能对抑制这种影响的作用.首先,介绍了电力系统中元件的概率分布模型和储能模型,以及拉丁超立方采样法及Gram-Schmidt序列正交化方法;其次,建立了多目标优化模型,模型考虑了储能系统的成本、支路潮流的越限概率和电网的网络损耗,并用遗传算法求取目标函数的最优解;最后,在IEEE24节点测试系统中进行了仿真,分析了光伏不同接入容量和接入位置对电力系统的影响,储能对电力系统的作用,得出了对应不同光伏容量的储能最优配置. 相似文献