Open AccessHigh‐accurate estimation method of sub‐synchronous and super‐synchronous harmonic parameters on PMU
Author(s) -
Tan Yong,
Chen Rong,
Wang Meng,
Zhang Min,
Hou Mingguo
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0534
Subject(s) - estimation , harmonic , computer science , control theory (sociology) , engineering , acoustics , physics , artificial intelligence , control (management) , systems engineering
With the rapid development of renewable energy power generations, AC/DC transmissions and static compensations etc., power electronic technology has been widely applied in power system. As traditional power equipment is replaced by a large number of power electronic devices, the disturbances such as harmonic interference and sub‐synchronous oscillation are more frequently. In order to detect the sub‐synchronous oscillation in power system in time, and take measures to ensure the safety and stability of power system, this article analyses the algorithm principle of the phasor measurement unit (PMU) and the communication architecture of wide area measurement system (WAMS)/PMU system. According to the IEEE Std C37.118‐2011 standard, it elaborates the problems and the limitations existing in the monitoring of sub‐synchronous and super‐synchronous harmonic parameters on WAMS. On the basis of the above, a method of online identification and alarm for the sub‐synchronous and super‐synchronous harmonic parameters on PMU device is proposed. Combined with the fast Fourier transform spectrum correction theory, the high‐accuracy identification method of distributed sub‐synchronous and super‐synchronous harmonic parameter is realised. The feasibility and accuracy of the method is verified by simulation experiments.