第 51 卷 第 16 期 电力系统保护与控制 Vol.51 No.16
2023 年 8 月 16 日 Power System Protection and Control Aug. 16, 2023
DOI: 10.19783/j.cnki.pspc.221692
考虑广域稳态量测时延的全网同时断面生成
严明辉 1,2,徐 伟 2
,汤 奕 3
,范旖晖 4
(1.东南大学网络空间安全学院,江苏 南京 211189;2.国电南瑞科技股份有限公司,江苏 南京 211106;
3.东南大学电气工程学院,江苏 南京 210096;4.国网江苏省电力有限公司,江苏 南京 210024)
摘要:互联大电网运行方式复杂多变,广域稳态量测数据采集不同步将引入较大的量测误差。为提高稳态量测数
据时标一致性,提出一种基于统一时钟的全网同时断面生成方法。首先,基于广域稳态量测数据时序特征,提出
一种固定时间间隔的数据滚动存储及循环更新方法,解决断面数据对齐问题。然后,采用电气介数法识别关键节
点,在保证关键节点量测数据实时性的基础上,基于量测量的时空关联特性修正未更新量测数据,从而确保整合
后全网同时断面数据的时效性和准确性。最后,基于标准算例和实际电网算例仿真结果,验证了所提方法的正确
性和有效性。
关键词:全网同时断面;量测时延;关键节点;数据汇集;时空关联
Entire network simultaneous section generation considering wide-area steady-state measurement delay
YAN Minghui1, 2, XU Wei2
, TANG Yi3
, FAN Yihui4
(1. School of Cyber Science and Engineering, Southeast University, Nanjing 211189, China; 2. NARI Technology
Co., Ltd., Nanjing 211106, China; 3. School of Electrical Engineering, Southeast University,
Nanjing 210096, China; 4. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210024, China)
Abstract: The operational mode of an interconnected large power grid is complex and changeable. Asynchronous
acquisition of wide-area steady-state measurement will lead to measurement errors. An entire network simultaneous
section generation technology based on a unified clock is proposed to improve the simultaneity of steady-state
measurement. First, based on time-series characteristics of wide-area steady-state measurement, a method for data storing
and updating circularly at fixed intervals is proposed to solve the problem of misalignment of section data. Then, the key
nodes are identified by the electric ‘betweenness’ method. Based on the real-time requirement of key nodes measurement,
unrefreshed measurements are modified by the spatio-temporal correlation characteristics. The timeliness and accuracy of
the entire network simultaneous section are guaranteed. Finally, the simulation results based on a standard test system and
a real power grid verify the correctness and effectiveness of the proposed method.
This work is supported by the National Key Research and Development Program of China (No. 2018YFB0904500).
Key words: entire network simultaneous section; measurement delay; key nodes; data aggregation; spatio-temporal correlation
0 引言
我国已形成世界上规模最大的交直流互联电
网,电网动态特性更加复杂、安全稳定运行风险不
断加大,客观上对电力系统在线分析提出了更高的
要求[1]。由于远程终端单元(remote terminal unit, RTU)
基金项目:国家重点研发计划项目资助(2018YFB0904500);
国电南瑞科技股份有限公司科技项目“复杂交直流电网在线
安全稳定智能分析技术研究”资助
采集的广域范围内稳态量测数据不含时标,量测数
据不同步、数据传输时延、国-分-省不同调度机
构间量测数据层层转发会对在线安全稳定分析准
确性产生较大影响。尽管相量测量单元(phasor
measurement unit, PMU)可以提供含时标的同步量
测数据,但受限于 PMU 量测可观性不足,RTU 稳
态量测依然是调度主站在线分析计算的主要数据
来源[2-3]。因此,亟需提高 RTU 量测数据时标一致
性,从而提高在线分析计算准确性,支撑大电网安
全风险实时决策。