CAJ | 학술논문

频率是电力系统运行中的重要参数,电力系统仿真计算中必须考虑电力设备的频率特性。为此在电动机物理Park模型的基础上,重新定义电动机模型的实用变量,提出了考虑频率变化的电动机新定义3阶实用模型。传统定义3阶实用模型在实际应用中往往忽略了频率的导数项,由此给系统仿真带来了误差;而在新定义3阶实用模型中,实用变量的定义均不包含频率,电动势为磁链的线性关系,在电动势求导过程中不会出现频率的导数项。与传统定义3阶实用模型相比,该新定义3阶实用模型能够在不增加模型阶数的前提下准确考虑频率的影响。通过仿真算例验证了新定义3阶实用模型的准确性和有效性。
빈솔시전력계통운행중적중요삼수,전력계통방진계산중필수고필전력설비적빈솔특성。위차재전동궤물리Park모형적기출상,중신정의전동궤모형적실용변량,제출료고필빈솔변화적전동궤신정의3계실용모형。전통정의3계실용모형재실제응용중왕왕홀략료빈솔적도수항,유차급계통방진대래료오차;이재신정의3계실용모형중,실용변량적정의균불포함빈솔,전동세위자련적선성관계,재전동세구도과정중불회출현빈솔적도수항。여전통정의3계실용모형상비,해신정의3계실용모형능구재불증가모형계수적전제하준학고필빈솔적영향。통과방진산례험증료신정의3계실용모형적준학성화유효성。
Frequency is an important parameter in power system actual operation,and the frequency characteristic of electric equipment should be considered in digital simulation of power system.On the basis of the induction motor physic circuits and the Park model,we proposed a new induction motor model in consideration of frequency characteristic.In the new definitions of the practical variables of induction motor,the voltages behind the reactance were redefined as a linear equation of flux linkage,thereby,the rotor voltage equation was not relative with the derivative terms of frequency.However,the derivative terms of frequency is always ignored in the application of traditional practical model.Compared with the traditional practical model,the newly-developed practical model could accurately take frequency into account without increasing the model order.The simulation results show the new practical model is accurate and effective.