风机惯量支撑对电网频率跌落特性的影响  

Influence of wind turbine inertia support on frequency drop characteristics of power grid

作　　者：陈龙翔 曹际储 于思奇 宋嘉炜 梁恺 孙大卫 CHEN Longxiang;CAO Jichu;YU Siqi;SONG Jiawei;LIANG Kai;SUN Dawei(State Grid Corporation of China,Beijing,100032,China;State Grid Jibei Electric Power Co.,Ltd.Research Institute,Beijing,100045,China)

机构地区：[1]国家电网有限公司,北京100032 [2]国网冀北电力有限公司科学研究院,北京100045

出　　处：《浙江电力》2023年第4期27-35,共9页Zhejiang Electric Power

摘　　要：大型同步电网中新能源渗透率日益增长,不具备惯量响应能力的新能源机组可能会削弱系统的惯性。针对这一问题,学者们提出了多种风机惯量支撑方式,并在IEEE标准算例系统中验证了风机惯量支撑的效果,但关于风机惯量支撑对同步大电网频率暂态稳定性影响的研究较少。为此,首先从故障时间梳理、典型算例仿真和数学模型分析三个角度出发,分析了新能源渗透率提升后同步大电网发生功率缺额事件的频率跌落特性。然后以此为基础,研究了风机惯量支撑对大电网频率跌落特性的影响。最后分析了风机同时进行惯量和一次调频支撑时,惯量响应对一次调频发挥功率支撑作用的影响。研究结果表明:不同的风机惯量支撑方式对系统频率跌落特性的影响差别较大,某些惯量支撑方式可能会加剧大电网频率跌落的幅度。With the increasing penetration of new energy sources in large synchronous grids,renewable generator units that do not have inertial response capability may undermine the inertia of the system.In response to this prob⁃lem,scholars have proposed a variety of inertia support methods for wind turbines and verified the effect of wind tur⁃bine inertia support in the IEEE standard example system.However,there are few research concerning the effect of wind turbine inertia support on the transient frequency stability of synchronous large grids.For this reason,the pa⁃per firstly analyzes the frequency drop characteristics in the case of power deficit in large power grid after the renew⁃able generator penetration increase by fault time sorting,typical example simulation and mathematical model analy⁃sis.Moreover,the influence of wind turbine inertia support on the frequency drop characteristics of large power grids is studied.Finally,the influence of the inertia response on the primary frequency modulation is analyzed when the wind turbines simultaneously perform inertia and primary frequency modulation support.The results show that different wind turbine inertia support methods have different effects on the system frequency drop,and that some in⁃ertia support methods may lead to drastic frequency drop.

关 键 词：频率稳定性 同步电网 风机调频 惯量响应 一次调频 

分 类 号：TM614[电气工程—电力系统及自动化]