柔性直流输电技术及提高IGBT元件运行稳定性的策略研究  

Research on Flexible HVDC Transmission Technology and Strategies for Improving the Operational Stability of IGBT Components

作　　者：李铜林 冯媛 黄亚欧 王涛 LI Tonglin;FENG Yuan;HUANG Yaou;WANG Tao(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,Guangdong,China)

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广东广州510663

出　　处：《南方能源建设》2023年第5期34-40,共7页Southern Energy Construction

基　　金：广东省重点研发项目“分布式海上风电场柔性直流输电站关键设备的研制”(2021B0101230001)。

摘　　要：[目的]随着清洁能源的战略地位不断提高,越来越多的新能源发电设备接入电网,但其电能质量不稳定,对交流输电网产生了较大的冲击。柔性直流输电网络可以有效隔离交流网络和直流网络,具有较好的发展前景。柔性直流输电的关键部件是由全控型IGBT(Insulate-Gate Bipolar Transistor,绝缘栅双极晶体管)元件为核心的换流阀,因此IGBT元件的安全稳定运行对整个柔性直流系统的稳定起到重要作用。为了提高IGBT元件的安全性和运行稳定性,必须控制其运行电流和电压,避免承受过流、过压损害,且需要控制环境的温度、湿度以及设备防腐性,改善运行条件。[方法]采用内外两方面措施:内部设置启动电阻、电抗器、避雷器等,进而控制回路的电流和电压;外部设置空调,提高房间严密度,设备防腐处理等保证工作环境的良好。[结果]内部回路配置启动电阻、电抗器、避雷器等设施的措施,限制回路电流、电压,进而控制极端情况下作用于IGBT元件上的过电流倍数、过电压倍数;外部通过控制IGBT所在房间的温度、湿度及其设备防腐性,为IGBT元件的运行提供一个适宜的环境,对提高IGBT元件的安全性及运行可靠性有所帮助。[结论]柔性直流输电可以很好地解决电能质量较差的新能源发电设施的电能传输问题。通过优化柔性直流输电系统回路的内部措施及提高IGBT元件运行环境适宜度的外部措施,提高IGBT元件乃至整个柔性直流系统的安全性和运行可靠性。[Introduction]With the continuous improvement of the strategic position of clean energy,more and more new energy power generation equipment is connected to the power grid,but its power quality is unstable,which has a great impact on the AC(Alternating-Current)transmission grid.Flexible DC(Direct-Current)transmission networks can effectively isolate AC and the DC networks,and have good development prospects.The key component of flexible DC power transmission is the converter valve.The key component of flexible DC power transmission is the converter valve with fully controlled IGBT components as the core.Therefore,the safe and stable operation of IGBT(Insulate-Gate Bipolar Transistor)components plays an important role in the stability of the entire flexible DC system.In order to improve the safety and operational stability of IGBT components,it is necessary to control their operating current and voltage to avoid overcurrent and overvoltage damage.At the same time,it is necessary to control the temperature and humidity of the environment,equipment corrosion resistance to improve operating conditions.[Method]Therefore,both internal and external strategies were adopted.Starting resistors,reactors,lightning arresters,etc.were installed internally to control the current and voltage of the circuit.Externally,air conditioners were set,the room tightness was improved,and equipment anti-corrosion treatment was equipped to ensure a good working environment.[Result]By configuring starting resistors,reactors,lightning arresters and other facilities in the internal circuit,the circuit current and voltage are limited,and then the overcurrent multiple and overvoltage multiple acting on the IGBT components are controlled under extreme conditions.By controlling the temperature and humidity of the room where the IGBT is located and the corrosion resistance of the equipment,a suitable environment is provided for the operation of the IGBT components,which is helpful to improve the safety and operational reliability of the IGBT compone

关 键 词：柔性直流 IGBT元件 运行稳定性 回路电流 回路电压 运行环境 

分 类 号：TM7[电气工程—电力系统及自动化] TM46