基于无功损耗的线路两端PMU相角差时变偏差修正方法
CSTR:
作者:
作者单位:

(1.华北电力大学新能源电力系统国家重点实验室,北京 102206; 2.国网浙江省电力有限公司电力调度控制中心,浙江 杭州 310007)

通讯作者:

薛安成(1979—),男,博士,教授,博士生导师,主要从事模型和数据驱动的电力系统稳定性分析和控制研究;E?mail:

中图分类号:

TM74

基金项目:

国家电网公司总部科技项目(5108?202019027A?0?0?00);国家自然科学基金(51627811)


Time‑varying deviation correction method of PMU phase difference at both ends of the line based on reactive power loss
Author:
Affiliation:

(1. State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources,North China Electric Power University, Beijing 102206, China; 2. Power Dispatching and Control Center, State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310007, China)

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    摘要:

    相量测量单元(PMU)的优势之一是提供同步的相角数据。然而,因时间同步异常、装置故障等因素,部分实测PMU相角数据存在异常,影响PMU应用。提出一种基于无功损耗的线路两端PMU相角差时变偏差修正方法。首先,基于线路无功损耗量测值与估计值构造单时刻相角差偏差估计模型;然后,针对单时刻估计模型受噪声影响大的问题,基于相角差和线路参数间关系,将利用单时刻数据的时变偏差估计模型转化为利用多时刻数据的恒定线路参数估计模型;最后,通过黄金分割算法估计获取线路参数后,结合PMU幅值、功率数据反推出PMU相角差偏差,实现PMU时变相角差偏差的估计与修正。仿真和某省实测PMU数据测试结果表明:该方法可准确估计相角差偏差,抗噪能力强;与现有方法相比,该方法仅需单工况数据即可实现估计与修正,适用于不同时变类型偏差的修正。

    Abstract:

    One of the advantages of the phasor measurement unit (PMU) is to provide synchronous phase angle data. However, due to factors such as abnormal time synchronization, device failures and other factors, some of the measured PMU phase angle data are abnormal, which could affect the PMU application. This paper proposes a method for correcting the time?varying deviation of PMU phase angle difference (PAD) at both ends of the line based on line reactive power loss. Firstly, based on the measured value and estimated value of the line reactive power loss, a single?time PAD deviation estimation model is constructed; Secondly, aiming at the problem that the single?time estimation model is greatly affected by noise, based on the relationship between the voltage PAD and the line parameter, the time?varying deviation estimation model by single?snapshot data is transformed into a constant line parameter estimation model by multi?snapshots data; after estimating the line parameters through the golden section search algorithm, the PAD deviation can be calculated by the PMU amplitude and power data, the estimation and correction of the time?varying PAD deviation at multiple times are realized. The test results of simulated and measured PMU data from a province show that the method could accurately estimate the PAD deviation and has strong anti?noise ability. Compared with the existing methods, this method only needs data under single power flow condition to realize the estimation and correction, and is suitable for the correction of different types of time?varying deviation.

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徐飞阳,孔 贺,蒋正威,等.基于无功损耗的线路两端PMU相角差时变偏差修正方法[J].电力科学与技术学报,2023,38(1):178-190.
XU Feiyang, KONG He, JIANG Zhengwei, et al. Time‑varying deviation correction method of PMU phase difference at both ends of the line based on reactive power loss[J]. Journal of Electric Power Science and Technology,2023,38(1):178-190.

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  • 在线发布日期: 2023-04-10
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