电解铝企业孤网运行频率的稳定控制策略研究  

Research on Frequency Stability and Control Strategy in Electrolysis Plant Isolated Grid

作　　者：祁志远 肖仕武[1] 李飞[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《华北电力大学学报（自然科学版）》2016年第1期27-31,38,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)项目(2012CB215200)

摘　　要：电解铝属高耗能产业,负荷颗粒度大,正常生产中易发生阳极效应,其孤网运行的稳定控制有其本身的特殊性。以电解铝企业孤网运行为例,推导了一次调频动态过程的数学表达式,进而得到最大频率偏差,最大频率变化率,静态频率偏差的数学表达式。针对企业与外网解列机组甩负荷情况,提出了自动修改负荷定值方法;针对孤网中电解铝的阳极效应问题,提出了增加加速度前馈环节的一次调频优化方法;针对孤网中发电机故障脱网,提出了降低电解铝负荷颗粒度大小的控制方法。最后,通过某企业孤立电网的仿真,验证了所提方法的正确性。Aluminum electrolysis is a high energy-consuming industry with large load particle size and anode effect in the normal production. So, the stability control of the electrolysis plant isolated grid has particularity of its own. In this paper, based on electrolysis plant independent operation, mathematical expressions of a dynamic process of primary frequency regulation are derived. And then mathematical expressions of the maximum frequency deviation, maximum rate of frequency change and static frequency deviation are obtained. For load shedding when electrolysis plant separates with external grid, the method of modifying the load setting automatically is proposed ; For anode effect of aluminum electrolysis, optimization method of primary frequency regulation by adding the acceleration feedforward is put forward ; For generator＇ s off-grid, the control method for reducing load particle size of aluminum electrolysis is presented. Finally, the validity of proposed methods is verified by the simulation of an isolated plant grid.

关 键 词：电解铝 孤网 一次调频 稳定控制 加速度前馈 

分 类 号：TM721[电气工程—电力系统及自动化]