An oil dielectric helical pulse line to demonstrate the principles of a Pulse Line Ion Accelerator （PLIA） has been designed and fabricated. The simulation of the axial electric field of an accelerator with CST code ...An oil dielectric helical pulse line to demonstrate the principles of a Pulse Line Ion Accelerator （PLIA） has been designed and fabricated. The simulation of the axial electric field of an accelerator with CST code has been completed and the simulation results show complete agreement with the theoretical calculations. To fully understand the real value of the electric field excited from the helical line in PLIA, an optical electric integrated electric field measurement system was adopted. The measurement result shows that the real magnitude of axial electric field is smaller than that calculated, probably due to the actual pitch of the resister column which is much less than that of helix.展开更多
The E-field of pulse line ion accelerator （PLIA） is unique with high frequency （~MHz）, large magni- tude （~MV/m）, and limited measuring space （~cm）. The integrated optical E-field sensor （IOES） has remarkabl...The E-field of pulse line ion accelerator （PLIA） is unique with high frequency （~MHz）, large magni- tude （~MV/m）, and limited measuring space （~cm）. The integrated optical E-field sensor （IOES） has remarkable advantages and has been used for PLIA E-field measurement. Firstly, the transfer function of the IOES has been calibrated to ensure measurement accuracy. The time-domain response illustrates that the sensor has a fast dynamic performance to effectively follow a 4 ns rising edge. Then, the E-field distribution along the axis and near the insula- tor surface of the PLIA was measured, showing that propagation of the E-field is almost lossless and the E-field near the insulation surface is about 1.1 times larger than that along the axis, which is in accordance with the simulation result.展开更多
通过测量电场获取电力设备实际遭受的过电压对于电力系统故障分析、电力设备绝缘耐受试验标准制定具有重要的指导意义。为此,提出了一种基于集成光学电场传感器的过电压测量技术。首先,介绍了该测量技术的基本原理;其次,研制了集成光学...通过测量电场获取电力设备实际遭受的过电压对于电力系统故障分析、电力设备绝缘耐受试验标准制定具有重要的指导意义。为此,提出了一种基于集成光学电场传感器的过电压测量技术。首先,介绍了该测量技术的基本原理;其次,研制了集成光学电场传感器,并对过电压测量系统的响应速度、频率响应等性能指标进行了测试;最后,采用所提出的测量技术对220 k V母线投入电容式电压互感器(CVT)、投入避雷器期间产生的过电压分别进行了测量。结果表明:过电压测量系统的响应速度达μs级,频率响应在5 Hz^100 MHz内比较平坦;在投入CVT和避雷器的暂态过程中,过电压上升时间约为几μs,过电压倍数可达1.73倍。测量结果反映的物理过程与理论分析一致。展开更多
基金Supported by National Natural Science Foundation of China (10921504, 11105197)
文摘An oil dielectric helical pulse line to demonstrate the principles of a Pulse Line Ion Accelerator （PLIA） has been designed and fabricated. The simulation of the axial electric field of an accelerator with CST code has been completed and the simulation results show complete agreement with the theoretical calculations. To fully understand the real value of the electric field excited from the helical line in PLIA, an optical electric integrated electric field measurement system was adopted. The measurement result shows that the real magnitude of axial electric field is smaller than that calculated, probably due to the actual pitch of the resister column which is much less than that of helix.
基金Supported by Fund of National Priority Basic Research of China (2011CB209403)National Natural Science Foundation of China(51107063)
文摘The E-field of pulse line ion accelerator （PLIA） is unique with high frequency （~MHz）, large magni- tude （~MV/m）, and limited measuring space （~cm）. The integrated optical E-field sensor （IOES） has remarkable advantages and has been used for PLIA E-field measurement. Firstly, the transfer function of the IOES has been calibrated to ensure measurement accuracy. The time-domain response illustrates that the sensor has a fast dynamic performance to effectively follow a 4 ns rising edge. Then, the E-field distribution along the axis and near the insula- tor surface of the PLIA was measured, showing that propagation of the E-field is almost lossless and the E-field near the insulation surface is about 1.1 times larger than that along the axis, which is in accordance with the simulation result.
文摘通过测量电场获取电力设备实际遭受的过电压对于电力系统故障分析、电力设备绝缘耐受试验标准制定具有重要的指导意义。为此,提出了一种基于集成光学电场传感器的过电压测量技术。首先,介绍了该测量技术的基本原理;其次,研制了集成光学电场传感器,并对过电压测量系统的响应速度、频率响应等性能指标进行了测试;最后,采用所提出的测量技术对220 k V母线投入电容式电压互感器(CVT)、投入避雷器期间产生的过电压分别进行了测量。结果表明:过电压测量系统的响应速度达μs级,频率响应在5 Hz^100 MHz内比较平坦;在投入CVT和避雷器的暂态过程中,过电压上升时间约为几μs,过电压倍数可达1.73倍。测量结果反映的物理过程与理论分析一致。
