基于最小均方时延估计法的强迫功率振荡扰动源定位方法

发布时间：2019-01-10 13:46

【摘要】：当电网发生强迫功率振荡时,快速找到扰动源并将其切除,对保障电网的安全稳定运行具有重要意义。电网中强迫功率振荡引起的机电扰动会沿着输电线路在电网中传播,根据传播到不同位置的扰动波形具有时间延迟的特点,提出了一种利用最小均方时延估计法定位扰动源的方法。利用二次差分法检测强迫功率振荡起振后,通过计算关键母线频率出现扰动波形的时差和先后次序,分析扰动传播的顺序,从而确定扰动源的位置。该方法只需要广域测量信息,可以实现在线应用。四机两区域系统算例和华中电网算例均验证了该方法的有效性。
[Abstract]:When the forced power oscillation occurs, it is very important to find the disturbance source quickly and remove it, which is very important to ensure the safe and stable operation of the power network. The electromechanical disturbance caused by forced power oscillation propagates along the transmission line in the power network. According to the disturbance waveform propagating to different positions, it has the characteristic of time delay. In this paper, a method of locating the disturbance source by using the least mean square time delay estimation method is proposed. After the forced power oscillation is detected by the quadratic difference method, by calculating the time difference and sequence of the disturbance waveform in the key bus frequency, the sequence of the disturbance propagation is analyzed, and the position of the disturbance source is determined. This method only needs wide area measurement information and can be applied online. The effectiveness of the method is verified by four-machine and two-area system examples and the central China power network examples.
【作者单位】：武汉大学电气工程学院;中国电力科学研究院;
【基金】：国家高技术研究发展计划(863计划)资助项目(2011AA05A119) 国家电网公司大电网重大专项资助项目(SGCC-MPLG029-2012)~~
【分类号】：TM712

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