大规模风电接入对电力系统暂态稳定风险的影响研究

发布时间：2018-02-17 07:26

本文关键词： 大规模风电并网故障严重程度暂态稳定效用理论风险评估　出处：《电测与仪表》2017年20期 　论文类型：期刊论文

【摘要】：大规模风电接入电网可能影响电网运行状态,造成系统暂态稳定特性改变,量化大规模风电接入对电力系统暂态稳定风险的影响,是保证风电消纳和电网安全的重要课题。在研究系统暂态稳定性分析中的风电模型和电网故障严重程度的基础上,提出一种评估大规模风电接入的电力系统暂态稳定风险评估方法。该方法充分计及风电出力与系统故障状态的随机性,并基于效用理论,以调度员对功角偏差的感知效用为度量指标,建立用非线性效用函数量化故障的严重程度,同时对系统暂态稳定风险指标的计算方法与流程进行了详细研究。将该方法应用于新英格兰39节点系统,对比研究了不同并网容量和并网点对暂态稳定风险的影响,仿真结果证明了所提方法的正确性和有效性。
[Abstract]:Large-scale wind power access to the power network may affect the operation state of the power network, resulting in the change of transient stability characteristics of the system, quantifying the impact of large-scale wind power access on the power system transient stability risk. It is an important task to ensure wind power consumption and power grid safety. Based on the study of wind power model and power network fault severity in transient stability analysis of power system, A risk assessment method for power system transient stability based on large-scale wind power access is proposed, which takes full account of the randomness of wind power output and system fault state, and is based on utility theory. Based on the dispatcher's perceived utility of power angle deviation, the degree of fault severity is quantified by nonlinear utility function. At the same time, the calculation method and process of system transient stability risk index are studied in detail. This method is applied to New England 39-bus system, and the influence of different grid-connected capacity and parallel network on transient stability risk is compared. Simulation results show that the proposed method is correct and effective.
【作者单位】：云南电力科学研究院;云南电力试验研究院有限公司;四川大学电气信息学院;
【分类号】：TM712

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