大功率电驱离心式压缩机组电压暂降问题分析与治理

Analysis and Mitigation of Voltage Sag on High-power Motor-driven Centrifugal Compressor Units

摘要:

为有效治理含大功率电驱离心式压缩机组天然气压气站电压暂降问题，文中根据两座含大功率电驱离心式压缩机组压气站（简称压气站）的运行信息，通过分析压气站电压暂降特征水平与站内敏感设备故障概率，提出压气站电压暂降分层分级治理方案。首先，根据压气站的设备参数信息，分析了压气站内电压暂降敏感设备类型、分布与连接关系；然后，分析了站内敏感设备电压暂降耐受机理，结合历史数据通过核密度估计方法拟合压气站电压暂降特征水平，利用能量损失函数评估敏感设备电压暂降故障概率；最后，根据压气站电压暂降特征水平与站内敏感设备故障概率提出了有效的电压暂降问题分层分级治理方案。

Abstract:

In order to effectively control the voltage sag of natural gas compressor stations with high-power motor-driven centrifugal compressor units, a hierarchical mitigation scheme for voltage sag in compressor stations is proposed based on the operation information of two typical compressor stations with high-power motor-driven centrifugal compressor units (hereinafter abbreviated as compressor stations) and by analyzing the characteristic level of voltage sag and the failure probability of sensitive equipment in compressor stations. Firstly, according to the equipment parameter information of compressor stations, the type, distribution and connection relationship of sensitive equipment for voltage sag in compressor stations are analyzed, and then the mechanism of voltage sag tolerance of sensitive equipment in the station is analyzed. Combined with the historical data, the characteristic level of voltage sag in compressor stations is fitted by nuclear density estimation method, and the failure probability of voltage sag of sensitive equipment is evaluated by energy loss function. Finally, according to the characteristic level of voltage sag and the failure probability of sensitive equipment in compressor stations, an effective hierarchical mitigation scheme for voltage sag is proposed.