基于系统灵活性分析的可再生能源消纳能力评估

发布时间：2018-01-17 17:20

本文关键词：基于系统灵活性分析的可再生能源消纳能力评估　出处：《东北电力大学》2017年硕士论文　论文类型：学位论文

【摘要】：电力系统灵活性是系统响应负荷功率和(或)波动电源功率变化而随之调节的能力,主要是15min-1h时间尺度内系统功率调节能力,表征了系统在调度周期内调节资源的充裕性,取决于电源功率调节特性和负荷需求响应特性(由于目前缺乏有效的需求响应激励机制,系统灵活性主要取决于电源的功率调节特性)。传统的机组组合编制方法通常基于电力平衡静态约束,忽视了机组调节性能的差异性,可能会导致所制定的机组组合方式不能适应可再生能源功率的波动,进而造成弃风弃光现象。因此,就需要结合负荷、可再生能源的波动特性,对调度周期内系统调节资源的充裕性进行量化评估,指导调度运行人员根据不同的运行情况合理安排灵活调节资源。本文围绕电力系统灵活性的定义,针对系统内多种资源在灵活性方面的供给及消耗情况进行了量化分析。由于考虑到当前高比例可再生能源渗透系统在跟踪负荷波动过程中主要困难为功率调节范围不足,因此本文选择将调节范围作为灵活性的量化指标。分析了网络约束对系统灵活性传输情况的影响,定义了灵活性判定矩阵,通过对各分区净灵活性与网络功率传输限制的判定,得到考虑网络约束下的系统灵活性充裕度情况。基于对系统灵活性充裕度的分析,提出了应用于开机方式制定阶段的可再生能源消纳能力评估方法。本方法能够针对特定开机方式下各时段系统灵活调节能力、可再生能源消纳情况以及造成弃风弃光的原因进行分析,并能够辅助调度运行人员根据一定的可再生能源消纳指标调整系统内的灵活调节资源。不同场景下的运行约束将一定程度上限制储能装置及电加热负荷灵活调节能力的展现。本文针特定的场景下,不同装置参数下所能对电力系统灵活性的提升情况进行了分析。最后,基于上述理论研究并结合实际运行需求,研发了系统灵活性评估软件。
[Abstract]:Power system flexibility is the ability of power system to adjust in response to changes in load power and / or fluctuating power supply, mainly in the 15min-1h time scale. The adequacy of regulating resources in the scheduling cycle is characterized by the characteristics of power supply regulation and load demand response (due to the lack of an effective demand response incentive mechanism at present). The flexibility of the system mainly depends on the power regulation characteristics of the power supply. The traditional method of generating unit configuration is usually based on the static constraints of power balance and neglects the difference of the unit regulation performance. It may result in the unit combination mode can not adapt to the fluctuation of renewable energy power, and then cause the phenomenon of abandoned wind and light. Therefore, it is necessary to combine the load, the fluctuation characteristics of renewable energy. This paper evaluates the adequacy of the system regulation resources in the dispatching cycle and instructs the dispatching operators to arrange the flexible adjustment resources according to different operation conditions. This paper focuses on the definition of power system flexibility. The supply and consumption of various resources in the system in terms of flexibility are analyzed quantitatively. Considering that the main difficulty in tracking load fluctuation in the current high proportion renewable energy permeation system is the power regulation norm. Inadequate perimeter. Therefore, this paper chooses the adjustment range as the quantitative index of flexibility, analyzes the influence of network constraints on the flexible transmission of the system, and defines the flexibility decision matrix. By judging the net flexibility of each partition and the network power transmission limit, the system flexibility adequacy under the network constraints is obtained. The analysis of the system flexibility adequacy is based on the analysis of the system flexibility adequacy. An evaluation method of renewable energy absorption capacity is proposed, which is applied to the development stage of startup mode. This method can flexibly adjust the capacity of the system in each period of time under a specific start-up mode. The situation of renewable energy consumption and the causes of wind abandonment and light loss are analyzed. The flexible adjustment resources in the system can be adjusted according to certain renewable energy consumption index. The operation constraints under different scenarios will limit the flexible adjustment of energy storage device and electric heating load to a certain extent. Ability to demonstrate. This article needle specific scene. The flexibility of power system is analyzed under different device parameters. Finally, the system flexibility evaluation software is developed based on the above theoretical research and practical operation requirements.
【学位授予单位】：东北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM73

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