| 引用本文: | 常凤筠,景炜,崔旭东,陈佳永,张玉龙.基于DSP的12脉动融冰控制保护系统的设计与实现[J].电力系统保护与控制,2020,48(1):126-134.[点击复制] |
| CHANG Fengjun,JING Wei,CUI Xudong,CHEN Jiayong,ZHANG Yulong.Design and implementation of 12-pulse melting ice control and protection system based on DSP[J].Power System Protection and Control,2020,48(1):126-134[点击复制] |
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| 摘要: |
| 设计了一套基于DSP的12脉动直流融冰装置控制保护系统。该系统采用恒电流控制策略确保输出稳定的融冰电流，同时在出现故障时能确保装置与变电站设备安全。分别建立了三相输电线路融冰时需进行倒闸切换和地线融冰仿真模型。地线融冰之前需要进行空载升压试验，防止由于地线绝缘强度不足，使接入装置的地线与相邻地线间的间隙可能会被击穿，产生接地故障损坏换流站设备。使用牛寨换流站的地线融冰参数建立了仿真模型，并对地线空载升压试验进行了仿真分析。结果表明，在地线击穿导致接地故障时，电压偏差保护能迅速动作，确保融冰装置与变电站设备安全。所提出的电压偏差保护已经在牛寨换流站的直流融冰设备中得到验证。 |
| 关键词: 直流融冰装置 空载升压试验 12脉动整流 |
| DOI：10.19783/j.cnki.pspc.190197 |
| 投稿时间：2019-02-25修订日期：2019-05-29 |
| 基金项目:南方电网科技项目资助(RXSVC14090201)“贵州铜仁碧江(大兴)500千伏输变电融冰兼SVC装置” |
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| Design and implementation of 12-pulse melting ice control and protection system based on DSP |
| CHANG Fengjun,JING Wei,CUI Xudong,CHEN Jiayong,ZHANG Yulong |
| (School of Electronics and Information Engineering, Liaoning University of Science and Technology, Anshan 114044, China;Computing Center of Anshan Normal College, Anshan 114005, China;Liaoning Rongxin Xingye Electric Power Technology Co., Ltd., Anshan 114000, China) |
| Abstract: |
| This paper designs a control and protection system of 12-pulse DC ice-melting device based on DSP. The system adopts constant current control strategy to ensure stable ice-melting current output, and in the event of failure to ensure the safety of equipment and substation equipment. Three-phase transmission line defrosting switch and ground line defrosting simulation models are established. No-load booster test is needed before the ground line melts ice. To prevent the ground wire insulation strength is insufficient, so that the ground wire of the access device and the adjacent ground wire gap may be broken, resulting in ground fault damage converter station equipment. The simulation model is established by using the ground wire ice melting parameters of Niuzhai converter station, and the simulation analysis is carried out on the no-load booster test of the ground wire. The results show that the ground fault is caused when the ground wire is broken, the voltage deviation protection can act quickly, ensuring the safety of the ice melting device and the substation equipment. The voltage deviation protection proposed in this paper has been verified in the DC ice-melting equipment of Niuzhai converter station. This work is supported by Science and Technology Project of China Southern Power Grid (No. RXSVC14090201) “Guizhou-Tongren-Bijiang (Daxing) 500 kV Power Transmission and Transformation Melting Ice and SVC Device”. |
| Key words: DC melting ice device no load boost test 12 pulsating rectification |
