风电与燃气轮机发电互补系统结构与容量配比的研究

对在我国新疆地区采用风力发电与燃气轮机发电组成的互补发电系统的结构和在一定风能资源条件下两种发电系统的容量配比进行了研究。论文首先针对实测的新疆达坂城风电场的风速数据,采用整体风电场功率输出模型,得到了风电场的输出与分布。根据实际的风电场输出负荷,设计了互补中燃气轮机的几种方案。针对燃气轮机的部分负荷运行特点,设计了不同方案的互补运行规则。最后根据不同运行规则,计算了互补系统的整体特性,得到了在一定条件下风电与燃气轮机发电较合适的容量配比。     

风电与燃气轮机互补系统发电成本敏感性分析

详细讨论了大型风电场与燃气轮机组成的互补发电系统发电成本的主要影响因子及其对系统的敏感性。通过对互补发电系统发电成本理论公式的研究,推导了互补系统中各项影响因子相对于发电成本的数学方程和影响尺度,得到了影响发电成本几个关键的影响因子。通过采用敏感性分析原理,对这些主要的影响因子在不同变化条件下对互补发电系统发电成本的影响进行了详细的分析与讨论,提出降低系统发电成本的可行性措施及其努力的方向,为在新疆地区实现这种互补发电系统提供经济分析上的基础。     

风气互补发电系统的内部机组组合问题研究

提出风气互补发电系统,利用燃气轮机的快速启停特性来弥补风电场的出力波动.在已有的互补发电系统容量配比的基础上,通过建立风气互补发电系统内部机组组合问题的优化模型,利用遗传算法,得到了内部燃气轮机机组组合结果,为本系统的工程实践提供了理论基础.     

风光互补发电系统基于光伏阵列倾角的设计优化

分析了风力发电系统与光伏发电系统各自的发电特性,介绍了尚义风光互补发电系统的构成,并指出光伏阵列倾角与风光发电互补系统发电量的关系。通过比较尚义县风光互补发电系统的各自功率曲线及发电量曲线,来优化光伏阵列的倾角设计。     

风光互补发电系统运行特性、输出功率曲线与负荷曲线的关系的研究

分析了风力发电系统与光伏发电系统各自的运行特性,阐述了尚义风光互补发电系统的构成,指出了风光互补系统能够弥补电和光电各自的缺陷。通过比较尚义县风光互补发电系统的日功率曲线与日负荷曲线,确定了风光互补发电系统的优越性。     

风储电站实时跟踪发电计划控制策略研究

针对风储电站实时跟踪发电目标,研究储能系统发电控制策略。该控制策略基于风电场实时输出功率超短期预测,根据风电场预测输出功率与发电计划之间的偏差,制定储能系统的发电目标,并根据储能系统的剩余容量、充放电深度、额定功率等影响储能系统使用寿命为约束条件,实时修正储能系统的发电目标,进而计算得到储能系统的实时发电功率值。文章提出了改进的线性外推预测的方法,采用滑动平均方法对线性外推预测的风电场输出功率进行平滑修正处理,并通过算例分析结果论证了文章方法可行性。     

生物质发电技术分析比较

文章主要对三类生物质发电技术进行了分析比较.生物质混烧发电技术在已有燃煤电站的基础上将生物质与煤混烧发电,投资成本是三类技术中最少的,但可能降低原燃煤电站效率.由于低热值燃气轮机技术尚未成熟,因此生物质气化发电技术仅适用于10MW以下中小规模发电系统,气化-余热发电系统效率较高,特别适用于5-6MW的发电系统.生物质直接燃烧发电技术比较成熟,但在小规模发电系统中蒸汽参数难以提高,只有在大规模利用时才具有较好的经济性,比较适合于10MW以上的发电系统.     

高温燃料电池与燃气轮机相结合的混合发电系统

高温燃料电池与燃气轮机相结合的混合发电系统具有高效、环保和可靠的特性,这种新颖的混合发电系统在未来分布式发电领域具有广阔的应用前景。有不少专家和学者对其系统构成度匹配、系统性能等问题做了大量研究。目前已有高温燃料电池与燃气轮机混合发电系统成功运行,但仍有很多问题需要进行进一步的研究和探索,以使该混合发电系统早日实现商业化运行。本文综述了高温燃料电池与燃气轮机混合发电系统的研究现状,展望了该混合发电系统在未来的研究度发展前景。     

30千瓦风／光互补联合发电系统

风／光互补发电系统利用风能、太阳能的互补特性，可提高系统供电的稳定怀和可靠性，减小储能蓄电池的容量，降低系统成本，３０ｋＷ风／光互补联合发电系统已在山东省即墨市小管岛安装运行。该系统包括五台５ｋＷ风力发电机，５０４０ＷＰ光电池、２２０ＫＷｈ蓄电池、３０ｋＶＡ逆变器等。本文介绍了该系统的组成和参数，控制策略、运行方式以及数据采集与处理系统，并给出了性能试验结果。     

风能与水能互补发电系统的研究

论述了水能与风能两种自然资源特性及互补的必要性和经济性,在此基础上提出风能与水能互补发电系统,构建了风能与水能互补发电系统的结构图、探讨了互补发电系统的运行策略及仿真运行与设计。风能与水能的互补开发、综合利用可提高发电系统的可靠性与稳定性,是一种行之有效可再生能源的利用方式。     

解决新疆风能资源大规模开发瓶颈的探讨

本文对如何解决新疆风能资源进行大规模开发时所遇到的瓶颈进行了探讨,提出了一种解决问题的新思路。用详细的数据介绍了新疆丰富的风能资源分布,讨论了在大规模开发时遇到的电网稳定性、有效负荷需求不足以及没有联网电网的支持等问题,最后,根据新疆拥有丰富的天然气资源,提出了采用一种新型的风电-燃气轮机互补发电系统来彻底解决风电场负荷的波动对电网稳定性不利的影响,为新疆的风能大规模开发提供了一种新的可能。     

Framework design of a hybrid energy system by combining wind farm with small gas turbine power plants

Owing to the stochastic characteristic of natural wind speed, the output fluctuation of wind farm has a negative impact on power grid when a large-scale wind farm is connected to a power grid. It is very difficult to overcome this impact only by wind farm itself. A novel power system called wind-gas turbine hybrid energy system was discussed, and the framework design of this hybrid energy system was presented in detail in this paper. The hybrid energy system combines wind farm with several small gas turbine power plants to form an integrated power station to provide a relatively firm output power. The small gas turbine power plant has such special advantages as fast start-up, shutdown, and quick load regulation to fit the requirement of the hybrid energy system. Therefore, the hybrid energy system uses the output from the small gas turbine power plants to compensate for the output fluctuation from the wind farm for the firm output from the whole power system. To put this hybrid energy system into practice, the framework must be designed first. The capacity of the wind farm is chosen according to the capacity and units of small gas turbine power plants, load requirement from power grid, and local wind energy resource distribution. Finally, a framework design case of hybrid energy system was suggested according to typical wind energy resource in Xinjiang Autonomous Region in China.     

Framework design of a hybrid energy system by combining wind farm with small gas turbine power plants

Owing to the stochastic characteristic of natural wind speed, the output fluctuation of wind farm has a negative impact on power grid when a large-scale wind farm is connected to a power grid. It is very difficult to overcome this impact only by wind farm itself. A novel power system called wind-gas turbine hybrid energy system was discussed, and the framework design of this hybrid energy system was presented in detail in this paper. The hybrid energy system combines wind farm with several small gas turbine power plants to form an integrated power station to provide a relatively firm output power. The small gas turbine power plant has such special advantages as fast start-up, shutdown, and quick load regulation to fit the requirement of the hybrid energy system. Therefore, the hybrid energy system uses the output from the small gas turbine power plants to compensate for the output fluctuation from the wind farm for the firm output from the whole power system. To put this hybrid energy system into practice, the framework must be designed first. The capacity of the wind farm is chosen according to the capacity and units of small gas turbine power plants, load requirement from power grid, and local wind energy resource distribution. Finally, a framework design case of hybrid energy system was suggested according to typical wind energy resource in Xinjiang Autonomous Region in China.     

Current situation and development of wind power in China

The current development of wind power in China was presented in this paper. Many regions such as Xinjiang Uygur Autonomous Region, Inner Mongolia Autonomous Region and southeast coastal region, etc. in China have abundant wind energy resource. At the same time, the utilization of wind power in China has been developing quickly and its prospect is promising in spite of many some obstacles. With the implementation of the Renewable Energy Law, some previous obstacles have been or are being eliminated. Much investment and many enterprises start to enter this field. In spite of this, there still exist some financial and technological obstacles. One of the technological obstacles is the stability of local power grid owing to the increasing proportion of the wind power capacity. Because the centralized development mode of wind power was adopted, the quick fluctuation of wind speed will influence the voltage and frequency stability of local power grid. In addition, large wind farm has little dispatching ability because of the uncontrollability, randomness and fluctuation of natural incoming wind. To erase these obstacles, a novel hybrid power system combining wind farm and small gas turbine power plants is discussed.     

风气互补发电系统与电力系统相互影响的研究

为研究风气互补发电系统对电网的影响,首先搭建了由风电机组、燃气轮机、电网线路、静止无功补偿器、电力系统稳定器和大型水力发电机组成的仿真系统,并对该系统的负载侧和电网线路中部节点进行了稳定性分析。仿真结果表明,电网在加载了风气互补系统后运行能保持稳定,并能在发生短时故障后恢复到原来状态。该文为进一步研究风气互补系统与电网的相互影响提供了良好的模型基础。     

风电场的容量可信度和可避免费用计算

建立了风电场发电可靠性模型,考虑了风的随机性,风电机组的强迫停运率,尾流效应以及不同风电场之间风的相关性。基于该模型和电力系统随机生产模拟,提出风电场容量可信度和可避免费用的计算方法,这对并网风电场的规划具有十分重要意义。     

新疆达坂城风电场风能资源特性分析

对新疆达坂城风电场的风能资源特性进行了详细的研究。基于在达坂城风电场实测的10m和24m高程的10min平均风速数据,分析了原始风速的分布特性。根据地表风速沿高度呈风剪指数分布的特性,计算了在各个轮毂高度上的风速分布。采用最小误差逼近算法原理,计算了风速韦布尔分布的参数以及平均风速和分布方差。通过对韦布尔分布的分析,计算了各个高度上风电场的平均风功率密度、有效平均风功率密度和可利用小时数等风能资源特性参数,为当地的风能开发提供分析基础。     

Optimal placement of wind turbines within a wind farm considering multi-directional wind speed using two-stage genetic algorithm

Most wind turbines within wind farms are set up to face a pre-determined wind direction. However, wind directions are intermittent in nature, leading to less electricity production capacity. This paper proposes an algorithm to solve the wind farm layout optimization problem considering multi-angular (MA) wind direction with the aim of maximizing the total power generated on wind farms and minimizing the cost of installation. A two-stage genetic algorithm (GA) equipped with complementary sampling and uniform crossover is used to evolve a MA layout that will yield optimal output regardless of the wind direction. In the first stage, the optimal wind turbine layouts for 8 different major wind directions were determined while the second stage allows each of the previously determined layouts to compete and inter-breed so as to evolve an optimal MA wind farm layout. The proposed MA wind farm layout is thereafter compared to other layouts whose turbines have focused site specific wind turbine orientation. The results reveal that the proposed wind farm layout improves wind power production capacity with minimum cost of installation compared to the layouts with site specific wind turbine layouts. This paper will find application at the planning stage of wind farm.