| 直流系统绝缘监测装置的改进研究 |
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| 引用本文： | 于培永,邵天宇,邓磊,王立欣.直流系统绝缘监测装置的改进研究[J].节能技术,2013(6):516-521. |
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| 作者姓名： | 于培永 邵天宇 邓磊 王立欣 |
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| 作者单位： | [1]黑龙江省电力有限公司检修公司,黑龙江哈尔滨150001 [2]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001 |
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| 摘 要： | 直流系统绝缘监测装置对电力系统的安全稳定运行起着十分重要的作用.通过对直流系统绝缘监测原理优缺点的分析,提出了一种平衡电桥与开关电阻相结合的新型直流系统绝缘监测装置设计方案,设计母线电压检测电路和支路漏电流采集模块分别监测母线和支路的绝缘状态.采用STM32系列单片机作为主控MCU和采集MCU,建立了一种分散式模块化的多控制器绝缘监测结构.同时对直流系统绝缘监测装置的软硬件部分进行了详细的设计,并研制成样机,在多种接地状态下验证了装置接地电阻测量、支路定位和故障报警的准确性.
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| 关 键 词： | 直流系统 绝缘监测 平衡电桥 开关电阻 实时监测 |
Improvement of DC System Insulation Monitoring Device |
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| YU Pei-yong,SHAO Tian-yu,DENG Lei,WANG Li-xin.Improvement of DC System Insulation Monitoring Device[J].Energy Conservation Technology,2013(6):516-521. |
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| Authors: | YU Pei-yong SHAO Tian-yu DENG Lei WANG Li-xin |
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| Affiliation: | 1.Maintenance Company of Heilongjiang Province Power Company, Harbin 150001, China; 2.Harbin Institute of Technology, Harbin 15001, China;) |
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| Abstract: | The DC system insulation monitoring device is an important guarantee for safe and reliable operation of the electricity systems.Based on the analysis of advantages and disadvantages of the DC system insulation monitoring principle,a new DC system insulation monitoring device is put forward,which is a combination of balanced bridge and switching resistance.Bus voltage detection circuit and branch drain current acquisition module are designed to monitor the insulating state of bus and branch,respectively.The STM32 microcontrollers are used as master MCU and acquisition MCU.In this way,a decentralized modular multi-core detection structure is established.Further,the hardware and software parts of the DC system insulation monitoring device are designed in detail.By testing the prototype in a variety of ground states,the accuracy of ground resistance measurement,branch positioning and fault alarm is verified. |
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| Keywords: | DC system insulation monitoring balanced bridge switch resistance real-time monitoring |
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