大规模风电并网电力系统运行风险评估与分析

发布时间：2018-06-28 04:00

本文选题：运行风险评估 + 风电功率误差　；参考：《电网技术》2016年11期

【摘要】：提出了一种考虑风电功率误差分布的电力系统改进风险评估方法,较传统评估方法更加精细地计算了系统运行风险。采用t-location scale(TLS)分布描述风电功率预测误差分布,与传统正态分布相比,可以更准确地描述风电预测误差分布情况。采用最优交流潮流模型计算最小切负荷量、节点电压和线路有功功率,与传统直流潮流模型相比,可以得到更准确的切负荷量和线路有功功率信息。计算了系统切负荷风险指标、电压越限风险指标、线路有功功率越限风险指标、电压崩溃风险指标,并引入了综合风险指标,结合风险等级的评判方法,更加全面合理地评估了系统运行的风险。此外,讨论和分析了不同风电接入节点、不同接入容量以及不同替换容量对系统运行风险的影响。从系统运行风险的角度,为电力系统规划风电接入容量和节点提供参考。最后,以IEEE RTS-79系统为例,对所提的方法和模型进行了分析和验证。
[Abstract]:An improved risk assessment method for power system considering wind power error distribution is proposed. Compared with the traditional evaluation method, the operational risk of the power system is calculated more accurately. Compared with the traditional normal distribution, the wind power prediction error distribution can be described more accurately by using the t-location scale distribution to describe the wind power prediction error distribution. The optimal AC power flow model is used to calculate the minimum shedding load, node voltage and line active power. Compared with the traditional DC power flow model, the information of shedding load and line active power can be obtained more accurately. The system load cutting risk index, voltage overrun risk index, line active power overrun risk index, voltage collapse risk index are calculated, and the comprehensive risk index is introduced, combined with the evaluation method of risk grade. A more comprehensive and reasonable assessment of the risk of system operation. In addition, the effects of different wind power access nodes, different access capacity and different replacement capacity on the operational risk of the system are discussed and analyzed. From the point of view of system operation risk, this paper provides a reference for power system planning wind power access capacity and nodes. Finally, taking IEEE RTS-79 system as an example, the proposed method and model are analyzed and verified.
【作者单位】：广西电力系统最优化与节能技术重点实验室(广西大学);
【分类号】：TM72

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