摘要
在超高压直流输电系统的直流测量系统中,使用光纤代替电力线传输激光能量以驱动远端测量传感器,可以实现高低电压隔离和绝缘以及抗电磁干扰。针对在实际运行中远端测量传感器故障率较高的问题,通过研究传感器各功能模块的工作原理、结构特点以及薄弱环节,研制了一种改进型直流测量传感器。该传感器采用光伏电池最大功率点跟踪技术,优化了各模块的电路设计,提高了模块的集成度,也改善了器件的性能。现场测试结果表明,改进型直流测量传感器在测量精度及功耗方面均优于国外产品。此传感器能提高直流测量系统的精确性和稳定性。
In Ultra-High Voltage Direct Current （UHVDC） transmission system, optical fibers are used to replace the powerlines to transfer the laser power to remote measurement modules. The laser power is then converted by photovoltaic cells to e-lectric power to drive the sensors. Such an optic DC measurement system can realize isolation between high and low voltage cir-cuit, insulation and anti-electromagnetic interference. Due to a high failure rate of the remote sensor, the operation principle,the structure and the weak point of the sensor are deeply analyzed. Based on the analysis, an improved DC measurement sensoris designed and developed. In the improved DC measurement sensor, the maximum power point tracking technique is adoptedfor the photovoltaic cell, and the circuit design of each module is optimized. These modifications not only improve the integra-tion level of the modules but also the device performance. The on-site test results show that the measurement accuracy andpower consumption of the improved sensor are better than those of the foreign sensor products. The designed sensor can im-prove the accuracy and stability of DC measurement systems.
出处
《光通信研究》
北大核心
2017年第4期55-58,共4页
Study on Optical Communications
基金
江苏省产学研前瞻性联合研究项目(BY2014013)
