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1.智能电网教育部重点实验室(天津大学),天津市 300072
2.国网经济技术研究院有限公司,北京市 102209
董博(1994—),男,博士研究生,主要研究方向:综合能源系统建模与分析计算。E-mail:dong.bo@tju.edu.cn
李鹏(1981—),男,通信作者,博士,研究员,主要研究方向:分布式发电、微电网与智能配电网的运行、仿真与分析。E-mail:lip@tju.edu.cn
富晓鹏(1990—),男,博士,讲师,主要研究方向:电力系统电磁暂态仿真与分布式发电技术。E-mail:fuxiaopeng@tju.edu.cn
收稿日期:2021-01-04,
修回日期:2021-02-08,
网络出版日期:2021-03-09,
纸质出版日期:2021-04-25
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董博,李鹏,富晓鹏等.基于改进增广节点方程的柔性互联配电网统一潮流计算方法[J].电力系统自动化,2021,45(8):22-31.
DONG Bo,LI Peng,FU Xiaopeng,et al.Unified Power Flow Calculation Method of Flexible Interconnected Distribution Network Based on Modified Augmented Nodal Equation[J].Automation of Electric Power Systems,2021,45(8):22-31.
董博,李鹏,富晓鹏等.基于改进增广节点方程的柔性互联配电网统一潮流计算方法[J].电力系统自动化,2021,45(8):22-31. DOI: 10.7500/AEPS20210104005.
DONG Bo,LI Peng,FU Xiaopeng,et al.Unified Power Flow Calculation Method of Flexible Interconnected Distribution Network Based on Modified Augmented Nodal Equation[J].Automation of Electric Power Systems,2021,45(8):22-31. DOI: 10.7500/AEPS20210104005.
未来柔性配电网中的直流环节可能以大量、分散的变流器形式与交流电网耦合,建立统一联立的计算模型对系统准确、高效求解将更具适用性。提出了一种基于改进增广节点方程的柔性配电网潮流分析建模方法。首先,建立了基于改进增广节点方程的交流和直流电网的网络模型,以及各类型节点的潮流约束。然后,考虑了作为耦合环节的换流器及智能软开关等包含多种控制模式的电力电子设备模型,形成了柔性配电网潮流计算的改进增广节点方程,并采用牛顿-拉夫逊法实现了对模型的求解。最后,通过改进的IEEE 123节点柔性配电网算例验证了所提算法能够有效实现对电力电子化柔性配电网的求解,并适用于包含多种运行模式场景下的系统时序潮流计算。
The DC links might be coupled with AC power grids in the form of a large number of dispersive converters in the future flexible distribution network. It will be more applicable to establish a unified and simultaneous power flow model for accurate and effective solution of the system. A power flow calculation method for flexible distribution networks based on modified augmented nodal equations is proposed. Firstly
the network models of AC and DC power grids and the power flow constraints of nodes with different types are established. Secondly
the electronic equipment models of multiple modes including converters and soft open points as coupling links are considered. Finally
the modified augmented nodal equation of power flow calculation in the flexible distribution network is formed
and the Newton-Raphson method is used to solve the model. The effectiveness of proposed method is verified on the modified IEEE 123-bus flexible distribution network. The proposed method is appropriate for the time-series power flow calculation in multiple operation modes.
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