非同步采样误差是周期性信号均值型参数数字化测量中普遍存在的一种误差。本文介绍了非同步采样误差的概念，推导了常用电工参数数字化测量中的非同步采样误差的公式，并分析了影响非同步采样误差的因素。最后提出了几种减小非同步采样误差的方法。

根据２０ＭＶＡ／１１０ｋＶＳＦ６气体绝缘变压器的结构，提出了考虑损耗后变压器绕组暂态电压分布计算的新方法Ｂｅｒｇｅｒｏｎ法，推导了有损耗的互感电路的等值参数和计算公式，并给出了计算结果。

A new method of digital signal processing: matrix pencil method is introduced. The fundamental principle of the matrix pencil method, the Moore-Penrose generalized inverse or pseudoinverse and singular value decomposition of a matrix are narrated. The calculation formulas of the matrix pencil method are deduced and the effects in noise reduction of the matrix pencil method in impulse voltage digital measurements are studied. Finally, it is pointed out that the matrix pencil method is quite an effective algorithm for the exponential and exponential oscillating impulse voltage and the measuring accuracy in impulse voltage digital measurements can be greatly improved with the matrix pencil method.

This paper presents a new method for the calculation of the transient voltage distribution over a transformer winding-the Bergeron's method. Using the nodal admittance matrix, formulae are developed for the resistances, and self and mutual inductances of the equivalent circuit. Calculated results are given. The method reduces internal memory requirement, allows easy formation of the nodal admittan...

论文作者研制了一种基于单片机的智能式高压电压表。该表能同时测量与显示交流有效值和峰值（交流试验）或直流平均值和峰值（直流试验），并且该表具有峰值自动保持、交直流试验自动判别、量程自动选择等功能。使用十分方便。

This paper presents an improved equivalent circuit of the transformer winding for transient analyses. A physical model and calculation formulas for the inductance of the transformer winding are introduced. The results of experiments show that the inductance of a high voltage winding of a transformer is similar to the inductance of the same winding with air core when the low voltage winding is short-circuited, the inductance decreases with frequency increasing, and its measured value at low frequency corresponds to its calculated one; however, the capacitance of the transformer winding is almost invariant at low and high frequencies. Finally, according to the results of calculations and experiments, the determination methods for the parameters of the equivalent circuit are presented.

In order to determine errors in measurement by a digitizer, a fast method of dynamic performance test is presented. In the test, a sine wave signal is taken as the input, the fitted waveform of output data is obtained by means of the correlative method and the least square method respectively, and in the meantime the amplitude of the input signal is measured accurately. Thus, the dispersity of the output data and the dynamic scale factor can be easily determined, and then random and systematic errors of the digitizers can be all-sidedly analyzed. The results of practical tests for a digitizer are given, and the variation patterns of errors in measurement are discussed.

Present IEC as well as National Standards define rules for the measurement of lightning impulse voltages by specifying requirements for the accuracy of impulse shape parameters as well as requirements related to the step response of a measuring system used for recording the impulse voltage. For full 1.2/50 lightning impulses without superimposed oscillations the response requirements are only given by the Response Time T of a unit step response. This figure, however, is not sufficient to detect virtual front times T/sub 1/ of the original, true impulse wave shapes which are not any more within the tolerances provided for a standard lightning impulse. Based upon a great number of computations using the convolution integral, a thorough investigation of the measuring errors and the relationship between virtual front time T/sub 1/ and relevant response parameters is made. As a result, the partial response time T..cap alpha.. and the overshoot delta of the step response of the measuring system are considered to be the main parameters determining the errors in the measurement of T/sub 1/. These three values can be interlinked to propose new recommendations for ensuring the measuring accuracy for T/sub 1/.