摘要
随着可再生能源并网发电和远距离交直流输电等应用的快速发展,电力电子技术被广泛应用于电力系统领域。大量传统电力设备被电力电子设备取代,使得电网谐波干扰、次同步振荡等扰动现象更加频繁。为了及时监测电力系统中因次同步振荡引起的次同步和超同步振荡谐波分量,采取措施保障机组安全和电力系统稳定运行,对遵循IEEE Std C37.118-2011标准的同步相量测量单元(PMU)装置测得的同步相量数据应用于主站监测次同步和超同步谐波分量是时存在的问题进行了分析,指出了其局限性。结合快速傅里叶变换(FFT)频谱修正理论,提出了在PMU装置上实现分布式次同步和超同步谐波分量参数估计的高精度辨识方法。总结了其中的关键技术,并通过仿真试验验证了该方法的可行性和准确性。该方法在PMU装置上实现了分布式的次同步和超同步振荡参数在线辨识精确估算。通过试验和实际工程数据,验证了PMU实现次同步和超同步振荡在线辨识告警的可行性和准确性。
With the rapid development of renewable energy power generation and long-distance AC/DC transmission etc,power electronics technology has been widely applied in the field of power system.Due to the large-scale applications of power electronic devices instead of traditional power equipment,disturbances such as harmonic interference and subsynchronous oscillation occur more frequently.In order to timely detect the harmonic components of subsynchronous oscillation supersynchronous oscillation in power system caused by subsynchronous oscillation,and take measures to ensure safe and stable operation of the generator set and power system,the problems and the limitations existing in the monitoring of subsynchronous and supersynchronous harmonic components by using the synchronous phasor data measured by phsaor measure unit(PMU)devices in accordance with IEEE Std C37.118-2011 were analyzed and pointed out.On the basis of the above,a method of distributed on-line identification and alarm for the subsynchronous and super-synchronous harmonic parameters on PMU device was proposed.Combined with fast Fourier transform(FFT)spectrum correction theory,the high accuracy identification method of distributed subsynchronous and supersynchronous harmonic component parameters was realized.The feasibility and accuracy of the method were verified by simulation experiments.
作者
汪燕倩
张敏
李明洋
侯明国
WANG Yanqian;ZHANG Min;LI Mingyang;HOU Mingguo(State Grid Electric Power Research Institute,Nari Group Corporation,Nanjing 211006,China;NARI Technology Co.,Ltd.,Nanjing 211006,China;State Key Laboratory of Smart Grid Protection and Operation Control,Nanjing 211006,China)
出处
《自动化仪表》
CAS
2020年第3期53-57,共5页
Process Automation Instrumentation
基金
国家电网公司2017科技基金资助项目。
关键词
电网谐波
次同步振荡
超同步振荡
电力系统
比值法
分布式测量
电力系统稳定运行
相量测量单元
Power harmonic
Subsynchronous oscillation
Supersynchronous oscillation
Power system
Ratio method
Distributed measurement
Stable operation of power system
PMU
