中文摘要：

为了测量特高压直流输电线路下的空间电荷密度,设计并实现了一种分布式测量系统.测量系统中有多台空间电荷密度测量装置,装置的测量原理是离子计数器法.所使用的电荷密度传感器为同轴圆柱型极板,并装配轴流风扇与流量计.装置采用STM32型ARM芯片作为核心控制器,以ZigBee无线传输方式与上位机通信,下位机软件使用C语言进行开发,上位机软件为C#WinForm程序,软件开发中使用了多线程并发技术.在昌平特高压试验基地使用了此测量系统,验证了此系统的可用性.

英文摘要：

In order to measure the space charge density in the ultra high voltage direct current（UHVDC） transmis-sion line,a distributed measurement system was designed and implemented. Measurement system has a number of space charge density measurement devices,besides the measurement of the device was based on the principle of the ion counter method. The coaxial cylinder type electrode plate was used as the charge density sensor,and the axial flow fan and the flow meter were assembled on the sensor. The device adopted the STM32 chip as the core control- ler,and communicated with the host computer through the mode of the ZigBee wireless transmission. The lower computer software was developed with the C language,and the upper computer software with the C# WinForm pro-gram. Multi-thread concurrent technology was used in the development of the software. And the measurement sys-tem was used in the UHV test base in Changping,verifying the availability of the system.