| 电-气综合能源系统状态估计可观测性分析 |
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| 引用本文： | 杨晓楠,郎燕生,姚远,陈艳波,朱承治. 电-气综合能源系统状态估计可观测性分析[J]. 中国电力, 2020, 53(10): 133-139. DOI: 10.11930/j.issn.1004-9649.202006094 |
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| 作者姓名： | 杨晓楠 郎燕生 姚远 陈艳波 朱承治 |
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| 作者单位： | 1. 电网安全与节能国家重点实验室（中国电力科学研究院有限公司），北京 100192;2. 华北电力大学电气与电子工程学院，北京 102206;3. 国网浙江省电力有限公司，浙江 杭州 310016 |
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| 基金项目： | 国家电网公司科技项目(考虑不同时间尺度的综合能源系统状态估计研究，52110418002R) |
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| 摘 要： | 状态估计对于电-气综合能源系统的运行监视、优化调度等起着至关重要的作用。在进行状态估计前，需根据现有的量测配置对系统进行可观测性分析，以保证状态估计的正常运行。由于2系统的时间常数差别较大，一般由微分代数模型来描述两者的耦合系统。首先通过有限差分法将描述天然气动态特性的偏微分方程差分化；在此基础上对电-气综合能源系统进行可观性分析，得到了电-气综合能源系统可观测性分析的判定依据与分析步骤。最终通过算例分析验证了所提方法的有效性。
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| 关 键 词： | 电-气综合能源系统 可观测性分析 动态特性 有限差分法 |
| 收稿时间： | 2020-06-08 |
| 修稿时间： | 2020-08-15 |
Observability Analysis on State Estimation of Integrated Electricity-Gas System |
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| YANG Xiaonan,LANG Yansheng,YAO Yuan,CHEN Yanbo,ZHU Chengzhi. Observability Analysis on State Estimation of Integrated Electricity-Gas System[J]. Electric Power, 2020, 53(10): 133-139. DOI: 10.11930/j.issn.1004-9649.202006094 |
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| Authors: | YANG Xiaonan LANG Yansheng YAO Yuan CHEN Yanbo ZHU Chengzhi |
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| Affiliation: | 1. State Key Laboratory of Power Grid Safety and Energy Conservation(China Electric Power Research Institute), Beijing 100192, China;2. School of Electrical & Electronic Engineering, North China Electric Power University, Beijing 102206, China;3. State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310016, China |
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| Abstract: | State estimation plays a vital role in the operation monitoring and optimal dispatching of integrated electricity-gas system(IEGS). Before state estimation, observability analysis should be carried out for the system according to the existing measurement configuration to ensure the normal operation of state estimation. Because of the significant difference between the time constant of the electricity system and that of gas system, the differential-algebraic model is generally used to describe the coupling system of the two systems. Firstly, the finite difference method is used to differentiate the partial differential equation for describing the dynamic characteristics of natural gas. On this basis, the observability analysis is carried out for the IEGS, and the judgment basis and analytical steps are obtained for the observability analysis of the IEGS. Finally, the effectiveness of the proposed method is verified by a case study. |
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| Keywords: | integrated electric-gas energy system observability analysis dynamic characteristics finite difference method |
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