US 11,815,565 B2
System for perceiving operating state of large power transformer based on vibro-acoustic integration
Yi You, Xinjiang (CN); Ling Zhang, Xinjiang (CN); Kaike Wang, Xinjiang (CN); Cheng He, Xinjiang (CN); Puzhi Zhao, Xinjiang (CN); Ronggang Gao, Xinjiang (CN); Jianping Zhao, Xinjiang (CN); Xinxin Wang, Xinjiang (CN); and Xianfu Liu, Jiangsu (CN)
Assigned to STATE GRID XINJIANG CO., LTD. ELECTRIC POWER RESEARCH INSTITUTE, Urumqi (CN); Nanjing Unitech Electric Power Co., Ltd., Nanjing (CN); and State Grid Corporation of China, Beijing (CN)
Appl. No. 17/616,310
Filed by STATE GRID XINJIANG CO., LTD. ELECTRIC POWER RESEARCH INSTITUTE, Xinjiang (CN); Nanjing Unitech Electric Power Co., Ltd., Jiangsu (CN); and State Grid Corporation of China, Beijing (CN)
PCT Filed Oct. 8, 2021, PCT No. PCT/CN2021/122594
§ 371(c)(1), (2) Date Dec. 3, 2021,
PCT Pub. No. WO2022/100323, PCT Pub. Date May 19, 2022.
Claims priority of application No. 202011249532.0 (CN), filed on Nov. 10, 2020.
Prior Publication US 2022/0349957 A1, Nov. 3, 2022
Int. Cl. G01R 31/62 (2020.01)
CPC G01R 31/62 (2020.01) 6 Claims
OG exemplary drawing
 
1. A system for perceiving an operating state of a large power transformer based on vibro-acoustic integration, comprising: a perception layer, a network layer and a diagnostic layer, wherein
the perception layer is used for monitoring, in real time, a state parameter for a coupling vibration signal and an acoustic signal of each of a transformer core, a winding, a clamp and a housing, a state parameter of each of a vibration signal and an acoustic signal during a gear position change of an on-load tap changer (OLTC), and preliminarily diagnosing and analyzing monitored data;
the network layer is used for reliably transmitting a monitoring signal to a background;
the diagnostic layer is used for managing basic information of a tested OLTC device; configuring a parameter for analysis of the perception layer; receiving the monitored data from the perception layer; analyzing and displaying a monitoring state and an advanced intelligent analysis result of the tested device in real time; performing fault data analysis, original graph analysis, envelope analysis, and energy spectrum analysis on the specific monitored data; generating and managing a case library; generating and managing a standard library; generating a report; receiving and managing basic device information and a tested device state from a data access node; alarming for an abnormal state and prompting a user; and counting and analyzing a fault gear position distribution, a fault type distribution and the like for the tested device state; and
wherein the perception layer is provided with two perception terminals, used for respectively acquiring a vibration signal and a voiceprint signal, and wirelessly transmitting the vibration signal and the voiceprint signal to a centralized control unit, a sensor, a data acquisition plate, a wireless module, and a battery being integrated into each of the perception terminals, wherein
a microprocessor control unit (MCU) module as a master control chip is used for configuring a sensor unit and a communication unit, acquiring and processing information of the sensor, and sending the information to the communication unit; the sensor unit is used for perceiving and acquiring environmental information; the communication unit is used for receiving and modulating a signal from the MCU or demodulating a signal from an antenna; the antenna is used for transmitting and receiving a signal; a vibro-acoustic signal passes through a micropower crystal amplifier from the sensor to an ultra-low-power voltage comparator; and when the vibro-acoustic signal reaches a limit value, a field effect transistor (FET) is activated.