Method, system and storage medium for online monitoring of operating state of on-load tap-changer
A technology of on-load tapping and running status, which is applied in the direction of measuring devices, measuring only current, measuring electrical variables, etc., can solve problems such as difficult to meet the intelligent diagnosis of online monitoring equipment, and achieve a good universal effect
Active Publication Date: 2022-02-15
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +3
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Problems solved by technology
Monitoring equipment manufacturers at home and abroad such as ZONSOL, Xiamen Hong, etc. have developed several sets of on-load tap-changer operation status monitoring equipment based on vibration signals, but the common problem is that it is difficult to meet the needs of professionals to make judgments on the operation status. Demand for Intelligent Diagnosis of Online Monitoring Equipment
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[0037] Below in conjunction with accompanying drawing of description, the present invention will be further described.
[0038] In recent years, machine learning technology has developed rapidly and has been widely used in the fields of pattern recognition and abnormal state. According to whether the training samples have labeled information, machine learning can be divided into supervised learning and unsupervised learning. In view of the diversity of converter OLTC models and fault types, it is difficult to obtain a relatively complete training sample set with labeled information, and unsupervised learning does not need to establish a training sample set with labeled information in advance, based on unsupervised The learning online monitoring system can be directly arranged on the equipment in normal operation, and learn from the vibration signal generated under the normal state of the equipment. In this way, when a fault occurs, the vibration signal changes, and the monitor...
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The invention discloses an on-line monitoring method for the running state of an on-load tap changer. Including: during the shifting process of the converter transformer on-load tap-changer, collecting the vibration signal of the converter transformer on-load tap-changer and the current signal of the drive motor of the converter transformer on-load tap-changer; according to the collected drive motor Determine the action time of the on-load tap-changer of the converter transformer through the current signal; filter the collected vibration signal; extract the characteristic parameters of the vibration signal, and establish the characteristic vector describing the vibration signal; establish a sample set according to the characteristic parameters of the vibration signal ; According to the established sample set, calculate the isolation degree of the respective vibration signals of each converter transformer on-load tap-changer, if the isolation degree is higher than the threshold value, it is considered that the corresponding on-load tap-changer of the sample is faulty. The method can automatically judge the running state of the on-load tap-changer of the converter transformer, and solve the problem that the current online monitoring equipment of the on-load tap-changer of the converter transformer is difficult to realize intelligent diagnosis.
Description
technical field [0001] The invention belongs to the technical field of on-line monitoring of electrical equipment, and in particular relates to an on-line monitoring method for the operating state of an on-load tap changer of a converter transformer based on unsupervised learning. Background technique [0002] As the core equipment of the rectifier and inverter interfaces in the DC transmission project, the operating status of the converter transformer is directly related to the safety of the entire DC transmission project. [0003] The on-load tap-changer of the converter transformer compensates the voltage fluctuation by changing the turns ratio of the converter transformer winding. It is the only frequently operated mechanical and electrical device in the converter transformer. The probability of occurrence increases, which will endanger the safety of the converter transformer. [0004] Compared with the on-load tap-changer of the AC transformer, the voltage regulation r...
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IPC IPC(8): G01R31/327G01R19/00G01H17/00
CPCG01R31/327G01R19/0092G01H17/00
Inventor 王同磊陆云才蔚超陶风波吴益明李建生官为民李栋张知先
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST