电器和变压器高压试验的计算机监控

COMPUTER MONITORING SYSTEM FOR HIGH VOLTAGE TESTING OF POWER TRANSFORMERS AND ELECTRIC APPARATUS

本文介绍了由微机监控的电器和变压器工频高压试验系统。这些系统峰值电压的测量采用计算机逐点采样以软件求峰的方式，并给出理论误差分析和实际校验结果。对于超高电压的放电试验，测量程序的设计可使测量速度达到周波跟踪的水平，从而保证了放电电压测量的准确。程序兼具判断越限，击穿，计时，数字化录波等多项智能。系统抗干扰经过精心设计，采用了屏蔽，抗干扰电源，光电隔离，电磁隔离，计算机电位悬浮等措施，使计算机装置在８２０ｋＶ放电电压下仍能正常运行。

A high voltage power frequency testing system for power transformer andelectric apparatus is discribed in this paper,The peak of voltage is measured in the software way by sampling the instantaneous value point by point. Error analysis in theory and comparison in practice are given For discharge testing in super-high voltage,the designation of measurement program makes the measure rate to the extent of tracing the voltage of each cycle.The measurement accuracy of discharging voltage can be ensured.The function of the program includes judgementS of over limit and breakdown,timing,digital recording of the wave form. With a careful design in anti-disturbance,the system is still working normally when a discharge at 820kV occurs.An anti -disturbance supply is used for the computer.Masking,optical and electromagnetic isolation,suspension in electrical of the computer are used too.