#Pspice ipulse generator#
The objective of this paper is to introduce a new computerized method to reconfigure the impulse-voltage generator in order to conduct the standard tests on any type of objects. It is well known that reconfiguring these generators by changing the high-voltage resistors and capacitors, and even the connecting leads in the laboratory is too bulky and time consuming, especially for large test objects. Purpose – Loading the impulse-voltage generator by test object can affect the generated voltage waveform. Evaluation of the simulation over several semesters with 80 students is very positive in terms of their developing confidence in and understanding of this simulation. In the first part of the paper the theoretical aspect of simulation is described, and in the second part the simulation method and results are described.
#Pspice ipulse how to#
The paper shows how to simulate the partial discharge in solid insulation in order to teach students the basics of partial discharge, and to practice analyzing the test results. It is therefore essential to detect their presence in a nondestructive control test.This paper describes an efficient method of teaching partial discharge of solid insulation, to undergraduate students of power system groups in electrical engineering departments, as a part of a high voltage course for senior undergraduate students. Although the magnitude of such discharges is usually small, they cause progressive deterioration and may lead to ultimate failure. The model can be used in scientific work or in the educational process as an auxiliary tool for visual demonstration of the conditions for the electric breakdown in long air gaps.Įlectric discharges that do not completely bridge the electrodes are called partial discharge. The proposed model allows to predict the volt-time characteristic of various air gaps in a virtual experiment. As experimental data, the experimentally obtained expression for the volt-time characteristic of the rod-rod air gap subjected to the positive polarity voltage pulses is used. It is determined that the simulation relative error does not exceed 10%. Simulation results are compared with experimental data. Wherein, the moments of breakdown of the air gap both at the front and at the tail of the applied voltage pulse are measured. Using the model, the breakdown time of the air gap is determined when subjected to the lightning pulses of positive polarity with different amplitudes. The article shows how to create the model of electrical breakdown of the air gap in the evaluation version of the Micro-Cap 11 circuit simulator. With the help of Kind's equal-area criterion in the circuit simulation programs it is possible to create the model of electrical breakdown of any air gap, including the rod-rod configuration. To create such model, it is not enough to take into account only the functional relationship between the breakdown voltage and the spacing between the electrodes. The lower bound of this interval corresponds to the beginning of the streamer propagation, and the upper bound corresponds to the time when the streamer reaches the opposite electrode. One of the most problematic places in this task is determination of the time interval of the streamer propagation. Inte- grating amplifiers of this type are used extensively in analog signal processing and in closed- loop control systems.The object of the research is the circuit simulation model of a streamer breakdown of a rod-rod air gap when exposed to positive voltage pulses.
The system is practical and can be realized as an electronic circuit with an operational amplifier, a resistor, and a capacitor, as described in Section 1.2.
We use the integral symbol in a block to denote the integrator. (3.20) This equation is the mathematical model of the system. The system is an integrator, in which the output is the in- tegral of the input: y(t) = x() dr. Also, make sure to impose zero initial conditions for L and C.ĮXAMPLE 3.2 Impulse response of an integrator Consider the system of Figure 3.3. Hint: You can approximate an impulse by means of a pulse having much shorter width than the lowest time constant of the circuit and sufficient amplitude to ensure unity area.
Transcribed image text: 3.1 Use PSpice to plot the impulse response of Example 3.2, compare with the calculated response, and comment.
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