| 配网合环干扰下的过电压计算模型设计与实现 |
| 点此下载全文 |
| 引用本文：宋伟,韩学军,刘同和,王晓华,赵少峰.配网合环干扰下的过电压计算模型设计与实现[J].电网与清洁能源,2020,36(8):21~27 |
| 摘要点击次数: 194 |
| 全文下载次数: 91 |
|
| 基金项目:国家自然科学基金（41375037） |
|
| 中文摘要:传统模型计算的过压准确性差。因此，设计并实现配网合环干扰下的过电压计算模型，采用针对多端设备的NIF模型准确描述设备的宽频特性，可直观获取设备在过电压下的宽频参数。将设备模型基于真实连接状态互联，采用矢量匹配法获取配网拟合频域参数，通过时域递归卷积运算获取配网合环干扰下各关键点的过电压情况。通过配网合环干扰下节点电压偏差隶属函数，构建过电压优化计算模型，提高配网合环干扰下的过电压计算精度。实验结果表明，所提方法可准确描述配网合环受过电压干扰的内部设备过电压水平，运算准确性更高，且有效控制节点的电压情况，提高系统的供电质量。 |
| 中文关键词:配网合环 过电压 运算模型 NIF模型 |
| |
| Design and Implementation of Overvoltage Calculation Model with Mesh-Ring Interference |
|
|
| Abstract:The traditional over-voltage calculation model uses the network synthesis analysis method to obtain the equipment broadband model， which is interfered by the distribution network loop. The obtained broadband parameters cannot fully describe all the properties of the equipment under overvoltage， and the accuracy of the over-voltage calculation is poor. To this end， this paper designs and realizes the calculation model of over-voltage under the mesh ring interference of the distribution network. The NIF model for the multi-terminal equipment is adopted to accurately describe the broadband characteristics of the equipment， and the parameters of the model are obtained by detecting the voltage response of different terminals of the equipment. The broadband parameters of the equipment under overvoltage are obtained intuitively. The equipment model is based on the real connection state interconnection， the vector matching method is used to obtain the distribution network fitting parameters in frequency domain， and time domain recursion is used to obtain the parameters. The overvoltage of the distribution network at the key points under the mesh ring interference is obtained by the convolution operation. Based on the node voltage deviation membership function， the optimal calculation model of overvoltage is established to improve the accuracy of overvoltage calculation. The experimental results show that the proposed method can accurately describe the overvoltage level of the internal equipment which is disturbed by the overvoltage of the distribution network， effectively control the voltage of the node， and improve the power supply quality of the system. |
| keywords:mesh ring of distribution network overvoltage operation model NIF model |
| 查看全文 查看/发表评论 下载PDF阅读器 |
