文章摘要
卫志农,朱梓荣,赵静波,等.电力系统半线性与全线性最优潮流模型探究[J].电力系统自动化. DOI: 10.7500/AEPS20171025007.
Zhu Zirong,, et al.Research on semi-linearized model and full-linearized model of optimal power flow[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20171025007.
电力系统半线性与全线性最优潮流模型探究
Research on semi-linearized model and full-linearized model of optimal power flow
DOI:10.7500/AEPS20171025007
关键词: 最优潮流  线性化  泰勒级数展开  操作点  热启动  原-对偶内点法
KeyWords: Optimal power flow  linearization  Taylor series expansion  operating point  hot start  primal dual interior point method
上网日期:2018-03-06
基金项目:国家电力公司科技项目
作者单位E-mail
卫志农 河海大学 能源与电气学院 wzn_nj@263.com 
朱梓荣 河海大学 能源与电气学院 hhuzhuzirong@163.com 
赵静波 国网江苏省电力公司电力科学研究院 1418412034@qq.com 
刘建坤 国网江苏省电力公司电力科学研究院 jiankun-liu@163.com 
孙国强 河海大学 能源与电气学院 hhusunguoqiang@163.com 
臧海祥 河海大学能源与电气学院 zanghaixiang@hhu.edu.cn 
摘要:
      大电网运行分析亟需可快速获取完整调度信息的线性化最优潮流模型,但传统热启动类线性化模型的计算精度受操作环境的影响较大。基于此,文章对电压幅值和相角进行解耦,通过泰勒级数展开的方式对功率平衡方程进行不同程度的线性化处理,从而得到同时考虑电压幅值和无功功率的一种半线性化模型和一种全线性化模型。针对半线性化模型,通过改良网损等值负荷的求解方式,提出一种基于改进网损等值负荷的直流最优潮流模型为其提供良好的操作点;对于全线性化模型,采用迭代更新操作点的方式消除其对操作环境的依赖性。
Abstract:
      Operational analysis of large power grid desiderates a fast way to get complete scheduling information, but traditional hot-start models are highly dependent on the operating point that the accuracy is affected by the operating environment. Based on this, this paper decoupled the voltage amplitude and phase angle, and the power balance equation was linearized in different degrees by means of Taylor series expansion to obtain a semi-linearized model and a full-linearized model considering both voltage amplitude and reactive power. As for semi-linearized model, this paper improved the method of calculating the equivalent load of network loss, and proposed a DC model based on improved network loss equivalent load to provide a good operating point. For the full-linearized model, this paper updated the operating point iteratively to eliminate its dependence on the operating environment.
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