考虑风电并网系统综合运行效益的可用输电能力研究

发布时间：2018-04-04 00:09

本文选题：风电　切入点：可用输电能力　出处：《东北电力大学》2016年硕士论文

【摘要】：随着世界范围内环境和能源问题的日益严峻,可再生能源在近年来得到了广泛的关注和快速的发展,其中,风能是目前世界上最具大规模商业化开发潜力的可再生能源,而风力发电是目前世界上增长速度最快的一种可再生能源发电技术。然而,由于风能本身所具有较强的间歇性和随机波动性,同时还具有一定的反调峰特性,这些特性对风电场的实时调度提出了愈发严峻的考验,一方面来说,电网中风电的消纳能力亟待得到进一步提高;另一方面,风电的大规模进入对电力系统运行经济性与可靠性上会产生较大影响,而可用输电能力(Available Transfer Capability,ATC)是电网运行中具有重要指导意义的参数,其分析与评估必然需要面临新的挑战。因此,建立考虑大规模风电并网电力系统综合运行效益的ATC优化模型,在确保系统安全性约束的前提下实现系统的每一运行点按照考虑系统综合运行效益的调度模型进行经济性调度,从而可以进一步对系统所有的发电资源进行优化配置,提高电网的运行效益和风电的消纳能力,从而实现电网运行安全可靠性与运行经济性的科学协调。在保证电网安全运行的前提下,尽可能的提高电网的风电接纳能力,是当前亟需研究的重点问题,具有重要的理论意义和工程应用价值。首先,本文提出一种风储联合系统及其运行策略,对风电出力波动进行平抑,进而提高其可调度性;然后,通过增加发电区域总发电量,达到极大化发电区域总发电量的目标,考虑风储联合系统的综合运行效益,在ATC计算过程中的每一状态对发电区域发电机有功出力进行考虑风储联合系统综合运行效益的优化调度,从而使系统运行于经济最优状态且具有较高的风电利用率,并引入简化的电压稳定局部指标L,从静态电压稳定角度确定系统的临界状态,从而有效评估了系统的可用输电能力。
[Abstract]:With the increasingly serious environmental and energy problems in the world, renewable energy has received extensive attention and rapid development in recent years. Among them, wind energy is the most large-scale commercial development potential of renewable energy in the world.Wind power generation is the fastest growing renewable energy generation technology in the world.However, since wind energy itself has strong intermittent and random volatility, and also has some anti-peak-shaving characteristics, these characteristics put forward an increasingly severe test for the real-time scheduling of wind farms. On the one hand,On the other hand, the large-scale entry of wind power will have a great impact on the economy and reliability of power system operation.Available Transfer capability (ATC) is an important parameter in power grid operation, and its analysis and evaluation must face new challenges.Therefore, the ATC optimization model considering the comprehensive operation benefit of large-scale wind power grid connected power system is established.Under the premise of ensuring the security constraints of the system, every running point of the system can carry out economic scheduling according to the scheduling model considering the comprehensive operating benefits of the system, so that all the power generation resources of the system can be further optimized and configured.In order to realize the scientific coordination between the safety, reliability and economy of the power grid, the efficiency of operation and the capacity of wind power consumption are improved.Under the premise of ensuring the safe operation of the power grid, it is an important problem to improve the wind power acceptance capacity of the power grid as much as possible, which has important theoretical significance and engineering application value.First of all, this paper proposes a combined wind storage system and its operation strategy to stabilize the fluctuation of wind power output and improve its schedulability. Then, by increasing the total power generation in the power generation area, we can achieve the goal of maximizing the total power generation in the power generation area.Considering the comprehensive operation benefit of the combined wind-storage system, the optimal scheduling of the combined wind-storage system is carried out in each state of the ATC calculation for the active power output of the generator in the generating area, considering the comprehensive operation benefit of the combined wind-storage system.Therefore, the system runs in the optimal state of economy and has a high utilization rate of wind power. A simplified local index of voltage stability, L, is introduced to determine the critical state of the system from the point of view of static voltage stability, and the available transmission capacity of the system is evaluated effectively.
【学位授予单位】：东北电力大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM614

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