| 引用本文: | 王 晶,骆旭伟,陈骏宇,金华锋.含微电网中压系统的PQ - 同伦全局潮流计算方法[J].电力自动化设备,2015,35(10): |
| WANG Jing,LUO Xuwei,CHEN Junyu,JIN Huafeng.PQ-homotopy method for calculating global power flow of MV system with microgrids[J].Electric Power Automation Equipment,2015,35(10): |
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| 摘要: |
| 以实现含微电网的中压系统的在线潮流计算为目标，提出了含微电网的中压系统的PQ-同伦全局潮流计算方法。将含微电网的中压系统分为中压系统以及由若干个微电网系统和子边界系统构成的系统，建立了含微电网的中压系统的潮流计算模型，并对子边界系统中的节点进行分类。提出自适应步长同伦算法对多个微电网系统进行并行潮流分析，按照Newton校正环节所使用的迭代次数自动调整同伦参数的步长，并在校正迭代不收敛情况下加入斜率补偿措施，减小算法对迭代初值和初始步长的依赖。给出了PQ-同伦全局潮流计算的实现框图。设计了1个由IEEE 14节点和IEEE 4节点系统构成的含微电网的中压系统，并通过MATLAB编程对所提算法的有效性进行了验证。 |
| 关键词: 中压系统 微电网 全局潮流 同伦算法 计算 模型 |
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| 基金项目:国家自然科学基金资助项目（51147010，51207139）；浙江省大学生科技创新活动计划（新苗人才计划）（2014R403038） |
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| PQ-homotopy method for calculating global power flow of MV system with microgrids |
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WANG Jing1, LUO Xuwei1, CHEN Junyu1, JIN Huafeng2
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1.Zhejiang University of Technology，Hangzhou 310023，China;2.WISCOM Company，Nanjing 211100，China
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| Abstract: |
| A PQ-homotopy method is proposed for online calculating the global power flow of MVSM（Medium-Voltage System with Microgrids），which establishes the power flow calculation model by dividing the MVSM into a MV system and several subsystems composed of microgrid system and sub-boundary system，and classifies the nodes of the sub-boundary systems. The adaptive homotopy method is applied to analyze in parallel the power flows of multiple microgrids and the step of its homotopy parameter is automatically adjusted according to the iteration times used in Newton correction. The slope compensation measure is added when the correction iteration is not convergent to weaken its dependence on the initial value and step. The block diagram of its implementation is given. A MVSM consisting of IEEE 4-bus and IEEE 14 -bus system is designed and the validity of the proposed method is verified in MATLAB environment. |
| Key words: medium-voltage system microgrid global power flow homotopy method calculations models |
