| 引用本文: | 林俊杰,陈冰冰,郭宜通,等.电力系统中的RTU测量非同步分析及其校正方法研究[J].电力系统保护与控制,2025,53(14):27-39.[点击复制] |
| LIN Junjie,CHEN Bingbing,GUO Yitong,et al.Research on asynchronous analysis and correction method of RTU measurement in power systems[J].Power System Protection and Control,2025,53(14):27-39[点击复制] |
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| 摘要: |
| 远程终端单元(remote terminal unit, RTU)是当前电网中最主要的测量终端，但是其量测量没有统一时标，更新频率低，而且存在不确定性的传输时延。而同步相量测量单元(phasor measurement unit, PMU)具有高同步、高精度等特点，成为电力系统中重要的数据采集装置。为协调利用这两种测量数据，首先归纳出RTU量测非同步的来源，分析了量测数据不同步对状态估计和潮流计算的影响，并给出了相关的验证结果。并提出基于能量交互算子的量测数据相关性分析方法。该方法应用同步数据间相关性最大的原理，利用PMU所产生的精确数据来同步RTU数据，为混合测量系统确定测量基准时刻。通过对IEEE39节点电网和广东83节点实际电网的仿真，结果表明该方法能有效校正量测数据非同步以及改善状态估计和潮流计算精度。 |
| 关键词: 同步相量测量单元 远程终端单元 电力系统 状态估计 潮流计算 数据对齐 |
| DOI：10.19783/j.cnki.pspc.240902 |
| 投稿时间：2024-07-11修订日期：2025-01-10 |
| 基金项目:国家自然科学基金项目资助(52407087)；新型电力系统运行与控制全国重点实验室开放基金课题资助(SKLD23KZ06) |
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| Research on asynchronous analysis and correction method of RTU measurement in power systems |
| LIN Junjie1,CHEN Bingbing1,GUO Yitong1,SONG Wenchao2,JIANG Changxu1,LU Chao2 |
| (1. School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China; 2. National Key Laboratory
for Operation and Control of New Power Systems (Department of Electrical Engineering and Applied Electronics,
Tsinghua University), Beijing 100086, China) |
| Abstract: |
| The remote terminal unit (RTU) is the main measurement terminal in power grids, but its measurements lack a unified timestamp, has low update frequency, and is affected by uncertain transmission delays. In contrast, the phasor measurement unit (PMU) offers high synchronization and accuracy, and has become an important data acquisition device in modern power systems. To enable coordinated use of these two types of measurement data, this paper first summarizes the sources of RTU non-synchronous measurements and analyzes the influence of non-synchronous measurement data on state estimation and power flow calculation, with supporting verification results. A measurement data correlation analysis method is proposed based on energy interaction operator. The method applies the principle of maximum correlation among synchronous data and uses the accurate data from PMU to align RTU measurements, establishing a reference timestamp for hybrid measurement systems. Simulations on the IEEE 39-node grid and a real 83-node grid in Guangdong province show that the proposed method can effectively correct the non-synchronous measurement data and improve the accuracy of state estimation and power flow calculation. |
| Key words: phasor measurement unit remote terminal unit electric power system state estimation load flow calculation data alignment |
