Development of Stability Evaluation Method by On-line Measurement of Eigen Frequencies of Power Systems

电力系统特征频率在线测量稳定性评价方法的研制

• 批准号: 10650284
• 负责人: MIYAUCHI Hajime
• 金额: $ 1.41万
• 依托单位: Kumamoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650284/
• 关键词: Stability evaluation; SMES; Eigen frequency; Power spectrum analysis; FFT; Measurement of system constants; オンライン安定度監視

On-line measurement method of eigen frequencies of power systems by SMES has been already proposed. When SMES gives the forced power perturbation to the power system, its transient response is measured and analyzed. The purpose of this study is to develop the on-line evaluation and observation method of power systems stability based on the on-line measurement of eigen frequencies of power systems by SMES.The eigen frequencies of power systems are measured experimentally, using the one-machine infinite-bus artificial power system and 50kJ SMES. When the number of core-less coils between the generator and the infinite bus is changed, the stability margin of the power system is changed. It is confirmed experimentally that the eigen frequency of the main mode becomes lower as the system moves to unstability.From the experimental and numerical results, the on-line evaluation and observation method of power systems stability is proposed. The method is as follows: the eigen frequencies of power systems are measured on-line every several minutes. When the eigen frequency moves low and beyond the threshold, it is measured continuously. When it moves lower, the stability improvement strategy is executed. Then the operator should confirm the eigen frequencies move high and the system recovers stability. The proposed on-line evaluation and observation method of power systems stability by measurement of eigen frequencies is studied basically in the experimental studies. Moreover, by the numerical studies, the application ability of the proposed on-line evaluation and observation method to the three-machine longitudinal system. By this study, it is made clear that the proposed method can be applied to the multi-machine longitudinal system which structure is simple.It is necessary to study and investigate the ability of the proposed method to the multi-machine system, which has the loop and so on.

利用SMES在线测量电力系统固有频率的方法已经被提出。当SMES对电力系统施加强迫功率扰动时，对其暂态响应进行了测量和分析。本研究的目的是建立基于SMES在线测量电力系统特征频率的电力系统稳定性在线评估与观测方法。利用单机无穷大人工电力系统和50kJ SMES进行了电力系统特征频率的实验测量。当发电机和无穷大母线之间的无铁心线圈数目改变时，电力系统的稳定裕度也会改变。实验证实，随着系统进入失稳状态，系统主模的特征频率变低，根据实验和数值结果，提出了电力系统稳定性的在线评估和观测方法。其方法是：每隔几分钟在线测量一次电力系统的特征频率。当本征频率变低并超过阈值时，将连续测量。当它向下移动时，执行稳定性改善策略。然后，操作员应确认本征频移高，系统恢复稳定。在实验研究中，对所提出的基于特征频率的电力系统稳定性在线评估与观测方法进行了初步的研究。此外，通过数值研究，验证了所提出的在线评估与观测方法在三机纵向系统中的应用能力。通过研究表明，该方法可以应用于结构简单的多机纵向系统，有必要研究和研究该方法对有回路等多机系统的能力。

项目成果

宮内 肇: "SMES有効電力の1周期励振による電力系統固有周波数測定の実験的検討"平成11年電気学会電力エネルギー部門大会論文I. 分冊A. 139-144 (1999)

Hajime Miyauchi：《利用SMES有功功率单周期励磁测量电力系统固有频率的实验研究》1999年日本电气工程师学会电力能源分会会议论文I.卷A.139-144（1999）

宮内肇: "SHES有効電力の1周期励振による電力系統の固有周波数測定の実験的研究"平成11年電気学会電力・エネルギー部門大会論文I. 分冊A. 139-144 (1999)

Hajime Miyauchi：“通过SHES有功功率单周期励磁测量电力系统固有频率的实验研究”1999年IEEJ电力与能源分部会议论文I.卷A.139-144（1999）

h.Miyaguchi: "Exprimental Studies of Measurement of Eigen Frequencies of Power system by One-period oscillation of SMES Active Power"Proceedings of the 10th Annual Conference of Power & Energy Society, IEE of Japan. A. 139-144 (1999)

h.Miyaguchi：《用SMES有功功率单周期振荡测量电力系统本征频率的实验研究》第十届电力年会论文集