双馈感应发电机参与调频的概率最优潮流模型

发布时间：2018-04-10 08:11

本文选题：概率最优潮流　切入点：双馈感应发电机　出处：《电力系统自动化》2017年23期

【摘要】：随着风电并网容量增加,风电机组部分取代同步机组,需要其参与调频以维持电网稳定性。现有电网经济调度研究,在考虑频率时往往忽略风电,或以风电功率代替具体风电机组。提出一种计及双馈感应发电机(DFIG)参与一次调频的概率最优潮流模型。计及风速预测误差概率特性,在优化目标中引入频率偏移,通过权重系数兼顾发电成本和频率偏移。引入DFIG内部约束,提出优化模型中DFIG参数的修正方法,实现DFIG与同步发电机共同参与一次调频。算例分析了DFIG参与调频效果、目标权重系数对优化结果的影响,给出了发电成本和频率偏移的概率特性,验证了所提模型的有效性。
[Abstract]:With the increase of wind power grid capacity, wind turbine partially replaces synchronous unit, which needs to participate in frequency modulation to maintain power network stability.In the current research on economic dispatching of power grid, wind power is often neglected when considering frequency, or wind power is used to replace specific wind turbine.A probabilistic optimal power flow model considering the participation of DFIGG in primary frequency modulation is presented.Considering the probability characteristic of wind speed prediction error, the frequency offset is introduced into the optimization target, and the power generation cost and frequency offset are taken into account through the weight coefficient.By introducing the internal constraints of DFIG, a modification method of DFIG parameters in the optimization model is proposed to realize the joint participation of DFIG and synchronous generator in primary frequency modulation.An example is given to analyze the effect of DFIG on frequency modulation and the influence of target weight coefficient on the optimization results. The probability characteristics of generation cost and frequency offset are given and the validity of the proposed model is verified.
【作者单位】：合肥工业大学电气与自动化工程学院;
【基金】：国家自然科学基金资助项目(51637004)~~
【分类号】：TM614;TM744

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