作者：花振国1, 刘鹤1, 王乐宁1, 杨胜2, 宋坤隆2, 孙茂一3, 郑凯2, 高宗宝2
作者单位：1. 国能大渡河瀑布沟发电有限公司, 四川 雅安 625304;
2. 国家能源集团科学技术研究院有限公司成都分公司, 四川 成都 610000;
3. 中国测试技术研究院, 四川 成都 610021
关键词：水轮发电机;高频局部放电测试;海量数据重构;老化线棒测试;真机实验
摘要：
我国局放测试设备主要采用低频技术，应用于大型水轮发电机存在测试数据波动性较大和局放识别困难等问题，而适用于大型水轮发电机的高频局放试验平台处于长期缺失状态。为此，该文基于海量数据分步处理架构搭建高频局放硬件平台，提出一种全新的局放特征信号重构算法，通过时域特征进行有效脉冲划分，完整提取出局放特征信息，同时大幅度削减数据量。根据该文所提方法开发一套高频局放测试系统，与传统局放仪进行对比实验分析。水轮发电机老化线棒实验室测试验证该文所提方法的有效性和优越性，局放测试波动值为4.8%，远低于传统局放仪的57.3%。真机试验中检测出一例典型绝缘缺陷，工程应用效果显著，具有一定的推广应用价值。
high frequency partial discharge test method for large hydro-generator based on massive data reconstruction
hua zhenguo1, liu he1, wang lening1, yang sheng2, song kunlong2, sun maoyi3, zheng kai2, gao zongbao2
1. china energy dadu river pubugou general hydropower plant, yaan 625304, china;
2. china energy science and technology research institute co., ltd., chengdu branch, chengdu 610000, china;
3. national institute of measurement and testing technology, chengdu 610021, china
abstract: in our country partial discharge test mainly uses the low frequency technique. applied to large hydroelectric generator, there are some problems such as the test data volatility is relatively high and fault recognition is difficult. however, the high frequency test platform which is suitable for large hydroelectric generator is missing in the long time. in this paper,the hardware platform for high frequency partial discharge test is built based on the step-by-step processing architecture of massive data, a new reconstruction algorithm of partial discharge feature signal is proposed.the partial discharge feature information is extracted completely through the effective pulse partition of time domain features, and the data amount is greatly reduced.according to the method proposed in this paper, a high frequency partial discharge test system is developed and compared with the traditional partial discharge instrument.the effectiveness and superiority of the proposed method are verified by the laboratory test of hydro-generator aging bar. the fluctuation value of partial discharge test is 4.8%, which is much lower than 57.3% of the traditional partial discharge instrument.a typical insulation defect was detected in the real hydro-generator test. the effect of engineering application is remarkable, and it has certain value of popularization and application.
keywords: hydro-generator;high frequency partial discharge test;massive data reconstruction;aging bar test;real hydro-generator test
2023, 49(6):92-99 收稿日期: 2022-10-03;收到修改稿日期: 2022-12-08
基金项目: 国家能源集团科学技术研究院科研项目（cd2021y001，cd2022y01）；国能大渡河瀑布沟发电有限公司科技项目（pdp-ky-2021-003）
作者简介: 花振国(1986-),男,河南范县人,工程师,主要从事水电站电气一次设备技术管理工作
参考文献
[1] 钱勇, 黄成军, 江秀臣, 等. 基于超高频法的 gis 局部放电在线监测研究现状及展望[j]. 电网技术, 2005, 29(1): 40-43
[2] meitei s n, borah k, chatterjee s. partial discharge detection in an oil-filled power transformer using fiber bragg grating sensors: a review[j]. ieee sensors journal, 2021, 21(9): 10304-10316
[3] zhang x, pang b, liu y, et al. review on detection and analysis of partial discharge along power cables[j]. energies, 2021, 14(22): 7692
[4] 刘凡, 徐洋涛, 孙茂一, 等. 基于 hht 的高压电力电缆附件局部放电分析方法[j]. 中国测试, 2016, 42(4): 33-37
[5] 郑大勇, 张品佳. 交流电机定子绝缘故障诊断与在线监测技术综述[j]. 中国电机工程学报, 2019, 39(2): 395-406
[6] luo y, li z, wang h. a review of online partial discharge measurement of large generators[j]. energies, 2017, 10(11): 1694
[7] 高电压测试设备通用技术条件 第4部分: 脉冲电流法局部放电测量仪: dl/t 846.4-2016[s]. 北京: 中国电力出版社, 2016.
[8] 局部放电测量仪校准规范: dl/t 356-2010 [s]. 北京: 中国电力出版社, 2010.
[9] 脉冲电流法局部放电测试仪校准规范: jjf 1616-2017[s]. 北京: 中国质检出版社, 2017.
[10] bartnikas r. partial discharges. their mechanism, detection and measurement[j]. ieee transactions on dielectrics and electrical insulation, 2002, 9(5): 763-808
[11] 李军浩, 韩旭涛, 刘泽辉, 等. 电气设备局部放电检测技术述评[j]. 高电压技术, 2015, 41(8): 2583-2601
[12] 唐志国, 唐铭泽, 李金忠, 等. 电气设备局部放电模式识别研究综述[j]. 高电压技术, 2017, 43(7): 2263-227
[13] boggs s a, stone g c. fundamental limitations in the measurement of corona and partial discharge[j]. ieee transactions on electrical insulation, 1982(2): 143-150
[14] ghanakota k c, yadam y r, ramanujan s, et al. study of ultra high frequency measurement techniques for online monitoring of partial discharges in high voltage systems[j]. ieee sensors journal, 2022, 22(12): 11698-11709
[15] baumgartner r, fruth b, lanz w, et al. partial discharge. x. pd in gas-insulated substations-measurement and practical considerations[j]. ieee electrical insulation magazine, 1992, 8(1): 16-27
