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| 量测量的时延差对状态估计的影响及其对策 | |
| 引用本文： | 赵红嘎,薛禹胜,高翔,潘勇伟,岑宗浩,李碧君.量测量的时延差对状态估计的影响及其对策[J].电力系统自动化,2004,28(21):12-16. |
| 作者姓名： | 赵红嘎 薛禹胜 高翔 潘勇伟 岑宗浩 李碧君 |
| 作者单位： | 1. 国电自动化研究院/南瑞集团公司,江苏省,南京市,210003;山东大学电气工程学院,山东省,济南市,250061 2. 国电自动化研究院/南瑞集团公司,江苏省,南京市,210003 3. 华东电网公司,上海市,200002 4. 东云信息技术公司,上海市,200002 |
| 基金项目： | 国家自然科学基金(59920037)，国家电力公司资助项目(SP11-2002-01-05)。 |
| 摘 要： | 监控和数据采集(SCADA)系统的量测量没有统一的时标，更新周期长，而且时延较大。同步采样的相量测量单元(PMU)正成为电力系统中另一种重要的数据采集装置，它可以反映动态响应且时延较小；由于带有精确时标，即使通道传输存在时延也能保证时间断面的一致性。为在状态估计中协调这两种量测量，处理各量测量不同的时延，建立了SCADA量测时延的均匀分布模型，分析了各量测数据所反映的时间断面不一致性对状态估计精度的影响，提出了对时延不同的量测量的处理方法。通过对IEEE14节点电网和一个366节点的实际电网的仿真，验证了该方法的有效性。 |
| 关 键 词： | 状态估计 量测时延 相量量测 SCADA量测 量测匹配 |
| 收稿时间： | 1/1/1900 12:00:00 AM |
| 修稿时间： | 1/1/1900 12:00:00 AM |
IMPACTS OF THE DIFFERENCE BETWEEN MEASUREMENT TRANSMISSION DELAYS ON STATE ESTIMATION AND THE COUNTERMEASURES |
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| Zhao Hongga,Xue Yusheng,Gao Xiang,Pan Yongwei,Cen Zonghao,Li Bijun Nanjing Automation Research Institute,Nanjing ,China Shandong University,Jinan ,China East China Grid Company Limited,Shanghai ,China Dongyun Information Technology Company,Shanghai ,China.IMPACTS OF THE DIFFERENCE BETWEEN MEASUREMENT TRANSMISSION DELAYS ON STATE ESTIMATION AND THE COUNTERMEASURES[J].Automation of Electric Power Systems,2004,28(21):12-16. | |
| Authors: | Zhao Hongga Xue Yusheng Gao Xiang Pan Yongwei Cen Zonghao Li Bijun Nanjing Automation Research Institute Nanjing China Shandong University Jinan China East China Grid Company Limited Shanghai China Dongyun Information Technology Company Shanghai China |
| Affiliation: | Zhao Hongga,Xue Yusheng,Gao Xiang,Pan Yongwei,Cen Zonghao,Li Bijun Nanjing Automation Research Institute,Nanjing 210003,China Shandong University,Jinan 250061,China East China Grid Company Limited,Shanghai 200002,China Dongyun Information Technology Company,Shanghai 200002,China |
| Abstract: | Without unified time label, supervisory control and data acquisition (SCADA) systems are usually of relatively large transmission delay and long updating cycle for measurements. Phasor measurement units (PMU) are synchronized data acquisition equipment with less transmission delay, which provide accurate synchronous criteria for the acquired data that is essential to monitoring power system dynamics. This paper builds an even distribution model for measurement transmission delay and analyzes the impacts of discrepancy in sampling moment on the accuracy of state estimation. Based on this, a method is proposed for coordinating PMU measurements with SCADA measurements of different delays. Simulations on the IEEE 14- bus system as well as a real 366-bus system validate the method. |
| Keywords: | state estimation measurement transmission delay phasor measurements SCADA measurements measurements matching |
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