中国电力 ›› 2024, Vol. 57 ›› Issue (10): 208-217.DOI: 10.11930/j.issn.1004-9649.202402020
白珈宁1(
), 桂林1(), 刘苗2(), 李岩军3, 高晨光3, 曹天植2, 严乙桉2
收稿日期:2024-02-04
接受日期:2024-03-29
出版日期:2024-10-28
发布日期:2024-10-25
作者简介:白珈宁（2000—），女，硕士研究生，从事变速抽蓄机组保护及故障分析研究，E-mail：1163590104@qq.com基金资助:
Jianing BAI1(), Lin GUI1(), Miao LIU2(), Yanjun LI3, Chenguang GAO3, Tianzhi CAO2, Yian YAN2
Received:2024-02-04
Accepted:2024-03-29
Online:2024-10-28
Published:2024-10-25
Supported by:摘要：
丰宁可变速抽蓄机组的投运使得其转子绕组保护方案的配置备受关注。运用多回路分析法，对湘潭电机厂制造的12 kW交流励磁样机所有实际可能发生的转子绕组内部故障进行了仿真，在此基础上对基于定子分支谐波环流的转子绕组新型主保护方案的性能进行了分析，并进一步明确了新型转子绕组主保护方案不能动作故障类型及相应的改进措施，为后续国产化示范项目中可变速抽蓄机组的稳定运行奠定基础。
白珈宁, 桂林, 刘苗, 李岩军, 高晨光, 曹天植, 严乙桉. 可变速抽蓄机组转子绕组新型主保护方案性能分析[J]. 中国电力, 2024, 57(10): 208-217.
Jianing BAI, Lin GUI, Miao LIU, Yanjun LI, Chenguang GAO, Tianzhi CAO, Yian YAN. Performance Analysis of New Main Protection Scheme for Rotor Winding of Variable Speed Pumped Storage Units[J]. Electric Power, 2024, 57(10): 208-217.
| 参数 | 定子 | 转子 | ||
| 槽数 | 54 | 45 | ||
| 绕组形式 | 双层叠绕组 | 双层叠绕组 | ||
| 极对数 | 3 | 3 | ||
| 并联支路数 | 3 | 1 | ||
| 每分支串联线圈数 | 6 | 15 | ||
| 节距 | 8 | 7 | ||
| 额定相电流/A | 15.79 | 5.65 | ||
| 额定功率/kW | 12 | / | ||
| 额定电压/V | 380 | / |
表 1 动模样机的基本参数
Table 1 Basic parameters of the dynamic simulation electrical machine
| 参数 | 定子 | 转子 | ||
| 槽数 | 54 | 45 | ||
| 绕组形式 | 双层叠绕组 | 双层叠绕组 | ||
| 极对数 | 3 | 3 | ||
| 并联支路数 | 3 | 1 | ||
| 每分支串联线圈数 | 6 | 15 | ||
| 节距 | 8 | 7 | ||
| 额定相电流/A | 15.79 | 5.65 | ||
| 额定功率/kW | 12 | / | ||
| 额定电压/V | 380 | / |
图 1 动模样机的定子绕组及其横差保护配置示意
Fig.1 Schematic diagram of stator winding and transverse differential protection configuration for the dynamic simulation electrical machine
图 2 动模样机的转子绕组抽头
Fig.2 Rotor winding taps of the dynamic simulation electrical machine
图 3 转子绕组新型主保护动作特性
Fig.3 Operation characteristics of the new main protection for the rotor winding
| 保护定值 | 数值 | |
| 裂相横差电流判据的启动电流定值(p.u.) | 0.20 | |
| 裂相横差电流判据的比率制动斜率 | 0.05 | |
| 裂相横差电流判据的延时定值/s | 0.10 | |
| 零序横差电流判据的启动电流定值/A | 0.10 | |
| 零序横差电流判据的比率制动斜率 | 0.20 | |
| 零序横差电流判据的延时定值/s | 0.10 |
表 2 新型主保护方案在动模样机上的定值
Table 2 Setting value of the new main protection scheme on the dynamic simulation electrical machine
| 保护定值 | 数值 | |
| 裂相横差电流判据的启动电流定值(p.u.) | 0.20 | |
| 裂相横差电流判据的比率制动斜率 | 0.05 | |
| 裂相横差电流判据的延时定值/s | 0.10 | |
| 零序横差电流判据的启动电流定值/A | 0.10 | |
| 零序横差电流判据的比率制动斜率 | 0.20 | |
| 零序横差电流判据的延时定值/s | 0.10 |
| 故障类型 | 同槽故障 | 端部故障 | ||||||||||||||
| 同相同分支 匝间短路 | 同相同分支 匝间短路 | 相间短路（两短路点间 相隔匝数） | ||||||||||||||
| 1匝 | 14匝 | 1匝 | 2匝 | 相隔0匝 | 相隔1匝 | 相隔13匝 | 相隔15匝 | |||||||||
| 不能动作的 故障数 | 15 | 1 | 9 | 1 | 2 | 5 | 1 | 1 | ||||||||
表 3 动模样机转子绕组内部短路故障时新型主保护方案不能动作故障数及其分布
Table 3 Number and distribution of faults that the new main protection scheme cannot operate when rotor winding internal short circuit faults of the dynamic simulation electrical machine occur
| 故障类型 | 同槽故障 | 端部故障 | ||||||||||||||
| 同相同分支 匝间短路 | 同相同分支 匝间短路 | 相间短路（两短路点间 相隔匝数） | ||||||||||||||
| 1匝 | 14匝 | 1匝 | 2匝 | 相隔0匝 | 相隔1匝 | 相隔13匝 | 相隔15匝 | |||||||||
| 不能动作的 故障数 | 15 | 1 | 9 | 1 | 2 | 5 | 1 | 1 | ||||||||
| 故障类型 | 同槽故障 | 端部故障 | ||||||||||
| 同相同分支 匝间短路 | 相间 短路 | 同相同分支 匝间短路 | 相间 短路 | |||||||||
| 1匝 | 3匝 | 1匝 | 2匝 | |||||||||
| 不能动作的故障数 | 15 | 15 | 4 | 9 | 15 | 90 | ||||||
表 4 动模样机转子绕组内部短路故障时转子过电流保护不能动作故障数及其分布
Table 4 Number and distribution of faults that the rotor overcurrent protection cannot operate when rotor winding internal short circuit faults of the dynamic simulation electrical machine occur
| 故障类型 | 同槽故障 | 端部故障 | ||||||||||
| 同相同分支 匝间短路 | 相间 短路 | 同相同分支 匝间短路 | 相间 短路 | |||||||||
| 1匝 | 3匝 | 1匝 | 2匝 | |||||||||
| 不能动作的故障数 | 15 | 15 | 4 | 9 | 15 | 90 | ||||||
图 4 转子U相绕组第2~15匝被短路时转子相电流和定子分支电流时域波形
Fig.4 Time domain waveforms of rotor phase currents and stator branch currents when the 2 nd to 15 th turns of the rotor U-phase winding are short circuited
图 5 转子U相绕组第2~15匝被短路时定子横差电流的谐波总有效值
Fig.5 Total effective harmonic values of stator transverse differential currents when the 2 nd to 15 th turns of the rotor U-phase winding are short circuited
图 6 转子U相绕组第2~15匝被短路时新型主保护方案的越限标志
Fig.6 Over-limit flags of the new main protection scheme when the 2 nd to 15 th turns of the rotor U-phase winding are short circuited
图 7 转子U相绕组第2~15匝被短路时转子相电流的有效值
Fig.7 Effective harmonic values of rotor phase currents when the 2 nd to 15 th turns of the rotor U-phase winding are short circuited
图 8 转子U相第15匝至W相第2匝被短路时转子相电流和定子分支电流时域波形
Fig.8 Time domain waveforms of rotor phase currents and stator branch currents when the 15 th turn of the U-phase to the 2 nd turn of the W-phase of the rotor are short circuited
图 9 转子U相第15匝至W相第2匝被短路时定子横差电流的谐波总有效值
Fig.9 Total effective harmonic values of stator transverse differential currents when the 15 th turn of the U-phase to the 2 nd turn of the W-phase of the rotor are short circuited
图 10 转子U相第15匝至W相第2匝被短路时新型主保护方案的越限标志
Fig.10 Over-limit flags of the new main protection scheme when the 15 th turn of the U-phase to the 2 nd turn of the W-phase of the rotor are short circuited
图 11 转子U相第15匝至W相第2匝被短路时转子相电流的有效值
Fig.11 Effective harmonic values of rotor phase currents when the 15 th turn of the U-phase to the 2 nd turn of the W-phase of the rotor are short circuited
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