A novel power network test signal generation method and device
A signal generating device and power network technology, which is applied to measuring devices, parts of electrical measuring instruments, measuring electricity, etc., can solve the problems of low probability of disturbance, uncontrollable excitation signal characteristics, low accuracy and practicability, etc. Achieve the effect of easy engineering implementation and application, low manufacturing cost, and high signal power
Active Publication Date: 2016-09-07
STATE GRID CORP OF CHINA +1
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Problems solved by technology
Due to the low occurrence probability and irregularity of the required disturbance, and the uncontrollable characteristics of the excitation signal, the accuracy and practicability of the measurement method based on the disturbance of the power grid itself are low
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[0026] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the present invention.
[0027] like figure 1 As shown, a power network test signal generating device of the present invention includes a main loop and a control loop, the main loop includes an isolation transformer 1, ...
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The invention provides a novel method and device for testing signal generation of a power network. The device comprises an isolation transformer, thyristor, parallel resistor, a pulse generator, a current and voltage measuring instrument, a voltage transformer and a current transformer; the method includes the following steps that a signal generation device is arranged between any two phases of circuits of the point to be tested of the power network; when the voltage is at a delta angle before a zero crossing point, a thyristor trigger pulse is formed; the thyristor is connected, an instantaneous short circuit is formed, and a periodic short circuit pulse voltage is generated to serve as an excitation signal needed by the power network test; the voltage value and the current value are measured by a current and voltage measuring module, and the measured data are sent to other measuring devices. Signal generation depends on the power network voltage itself, and the signal is large in power, and has regularity and predictability, so that the measuring accuracy is high, engineering achievement and application are easy and production cost is low when the pulse voltage generated by the method and device is adopted as a signal source to conduct power system measurement.
Description
technical field [0001] The invention relates to the technical field of power network testing, in particular to a method and device for generating a power network testing signal. Background technique [0002] The power system is a complex system composed of generators, transmission lines, transformers, electrical equipment and other components. In order to ensure the safe, stable and economical operation of the power grid, it is necessary to configure the necessary control devices and protection devices, and at the same time carry out the calculation and analysis of the power system. The realization of some of these functions needs to be based on online measurement and identification of equivalent model parameters of local systems or equipment combinations. This kind of online measurement and model parameter identification is often realized based on data analysis and processing between a special excitation signal and the response signal of the system. [0003] At present, t...
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IPC IPC(8): G01R1/28
Inventor 贾善杰李雪亮李山牛新生薛万磊郑志杰张晓磊刘晓明路宽杨慎全梁荣王轶群杨波冯亮
Owner STATE GRID CORP OF CHINA