中国电机工程学报Issue(19)：135-141,7.
中性点不接地配网的三相潮流模型
Three-phase Power Flow Model for Ungrounded Distribution Networks
摘要
Abstract
In a neutral ungrounded system, zero sequence network is open with a characteristic of zero sequence current of 0. Based on this fact, endpoint models, including PQ, PV and balance forms, as well as load models, including constant impedance and constant power forms, were established. Furthermore, a three-phase power flow model with injection current form was developed for a distribution network. Newton-Raphson method was used to solve the presented model, and the modified IEEE-13 bus distribution system was tested to verify the characteristic of zero sequence voltage, the uncontrollability of three-phase power. Meanwhile, the relationship of neutral voltage and zero sequence voltage, also the discrepancy between phase-to-ground power and phase-to-neutral power was analyzed. The results show that zero sequence voltage has nonzero characteristic when the network structure or the voltage of balance endpoint is asymmetrical;three-phase power is not completely controllable when the power flow is asymmetrical.关键词
电力系统/配电网/中性点不接地/三相潮流/注入电流方程Key words
power system/distribution network/isolated neutral/three-phase power flow/injection current equation分类
信息技术与安全科学引用本文复制引用
颜伟,杨焕燕,赵霞,余娟,杜跃明,王俊杰,邓亚拓..中性点不接地配网的三相潮流模型[J].中国电机工程学报,2013,(19):135-141,7.基金项目
国家自然科学基金项目(51177178)；输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512712203)。Project Supported by National Natural Science Foundation of China (51177178) （51177178）
Project Supported by Scientific Research Foundation of State Key Lab. of Power Transmission Equipment and System Security (2007DA10512712203) （2007DA10512712203）
