CAJ | 학술논문

国内外普遍采用电声脉冲法(PEA)来测量固体电介质中空间电荷的分布。但受固体介质的声学特性和系统频带响应的影响，所测信号的波形会产生畸变，一方面，信号幅值产生衰减，波形脉宽展宽；另一方面，信号产生过冲，严重影响对空间电荷形成机理及分布的判断。针对引起波形畸变的两个主要因素：介质的衰减和色散及测量系统的频带响应引起的非线性相位失真和损耗，综述了国内外关于不同固体电介质形状的空间电荷波形恢复的方法，对比了不同方法的恢复效果，并指出了基于PEA的波形恢复的发展方向和要求。
국내외보편채용전성맥충법(PEA)래측량고체전개질중공간전하적분포。단수고체개질적성학특성화계통빈대향응적영향，소측신호적파형회산생기변，일방면，신호폭치산생쇠감，파형맥관전관；령일방면，신호산생과충，엄중영향대공간전하형성궤리급분포적판단。침대인기파형기변적량개주요인소：개질적쇠감화색산급측량계통적빈대향응인기적비선성상위실진화손모，종술료국내외관우불동고체전개질형상적공간전하파형회복적방법，대비료불동방법적회복효과，병지출료기우PEA적파형회복적발전방향화요구。
Both at home and abroad, the pulsed electro-acoustic (PEA) method is commonly adopted to measure the space charge distribution in dielectrics, but the measured signal waveforms will generate distortion because of the impact of acoustic characte-ristics of solid dielectrics and the system band response. On the one hand, signal amplitude attenuates and pulse width broadens;on the other hand, the signal generates overshooting, which severely affects the judgement of formation mechanism and distribution of space charge. In allusion to the two main factors of dielectric attenuation and dispersion causing waveforms distortion, the non-linear phase distortion and loss caused by system band response were measured. This paper described the space charge waveforms recovery method of different solid dielectrics shape at home and abroad and compared the recovery effects, pointing out the devel-opment direction and requirements of waveforms recovery based on PEA.