（录用通知已邮寄） 适用于局部放电模拟的校正信号发生电路研究

针对局部放电检测装置在使用过程中的放电量校准环节,根据局部放电测量标准GB/T 7354-2003/IEC60270:2000,设计了一种局部放电模拟设备,作为局部放电的模拟信号。该模拟源主要由方波发生电路和信号控制发生电路两部分构成。其中,利用锁相环芯片HEF4046BP的方波发生电路产生脉冲信号;用移相电路、方波变换电路和方波占空比调节电路组成的控制电路对脉冲信号进行调节。经试验:该模拟源能有效的输出局部放电模拟信号,脉冲的相位、幅值和个数均可根据目标信号进行调节,能够模拟多种局部放电情况,改进了传统定量脉冲装置功能单一的情况。

Study of correction signal generating circuit suitable for partial discharge signal simulation

According to the standard of partial discharge measurement GB /T 7354-2003/IEC 60270:2000, a device which the phase , amplitude and number of pulses are adjustable has been designed as a simulation source for the dis -charge quantity calibration in the detection process of partial discharge device .The simulation source is made by square wave generating circuit and signal controlling circuit .In this circuit, the square wave is generated by using chip HEF4046 BP; the signal control circuit consists phase shifting circuit , square wave transforming circuit and square wave duty cycle controlling circuit .In order to verify the feasibility of the circuit , the whole circuit is built . The experimental results show that the function of the traditional quantitative pulse device is improved , the analog source can effectively output the PD signal in a variety of situations .