新型电力系统中高压感应电机起动过程不同算法的对比研究  

Comparative study on different algorithms of starting process of high voltage induction motor in novel power system

作　　者：白晶[1] 张志坚 王卫[1] 周运斌[1] 张绍峰 Bai Jing;Zhang Zhijian;Wang Wei;Zhou Yunbin;Zhang Shaofeng(State Grid Beijing Electric Power Company,Beijing 100031,China)

机构地区：[1]国网北京市电力公司,北京100031

出　　处：《电测与仪表》2023年第7期70-76,共7页Electrical Measurement & Instrumentation

基　　金：国家电网有限公司科技项目(5100-202111025A-0-0-00)。

摘　　要：电力行业碳排放是我国碳排放的主要组成部分,为实现“双碳”目标,建设低碳新型电力系统成为必然趋势。然而大量新能源导致电力系统过载能力低,大型感应电机起动可能导致设备脱网,对系统稳定带来不利影响。因此大型电机起动过程高效精确的计算对新型电力系统暂态时域仿真尤为重要。从精度、稳定性和仿真效率等角度对比研究了传统显式欧拉、隐式欧拉、隐式梯形、龙格库塔四种算法,其中隐式梯形法同时具备精确高效的优点,但采用大步长时易出现数值振荡问题。在此基础上,提出了一种改进梯形高效稳定算法,对传统隐式梯形法引入可变参数,并确定了使算法可靠收敛的参数最优区间。相比传统梯形法,该算法能够基本不增加计算复杂度的同时有效解决数值振荡问题。以一台600 kW电机起动为例,验证了采用改进算法没有数值振荡问题,表明改进梯形法的有效性和可行性,为低碳新型电力系统高效仿真算法的选择提供参考。The carbon emission of the power industry is the main component of carbon emissions in China.To achieve the double carbon goal,it is an inevitable trend to build a novel low-carbon power system.However,a large number of new energy sources lead to low overload capacity of the power system.The starting of large induction motors may lead to equipment disconnection,which will adversely affect the stability of the system.Therefore,the efficient and accurate calculation of large motor starting process is particularly important for the transient time domain simulation of novel power system.In this paper,traditional explicit Euler,implicit Euler,implicit trapezoid and Runge Kutta algorithms are compared and studied from the aspects of accuracy,stability and simulation efficiency.The implicit trapezoid algorithm has the advantages of accuracy and efficiency,but it is easy to cause numerical oscillation with large time step.On this basis,an improved trapezoidal efficient stability algorithm is proposed,variable parameters are introduced into the traditional algorithm,and the optimal parameter interval for reliable convergence of the algorithm is determined.Compared with the traditional trapezoidal method,the algorithm can effectively solve the numerical oscillation problem without increasing the computational complexity.Taking a 600 kW motor starting as an example,it is verified that the improved algorithm has no numerical oscillation problem,which shows the effectiveness and feasibility of the improved trapezoidal method,and provides a reference for the selection of efficient simulation algorithms for novel low-carbon power system.

关 键 词：感应电机起动 新型电力系统 数值振荡 改进梯形法 

分 类 号：TM346[电气工程—电机]