Method for exciting subsynchronous oscillation of generator set by utilizing subsynchronous oscillation suppression device
A subsynchronous oscillation and suppression device technology, which is applied in the direction of motor generator testing, etc., can solve the problems that the shaft system subsynchronous oscillation of the generator set endangers the safe operation of the power grid and the generator set, does not stimulate the subsynchronous oscillation of the generator set, and does not mention it.
Active Publication Date: 2011-06-29
CHINA SHENHUA ENERGY CO LTD +6
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Problems solved by technology
Based on the application of the above technologies, the subsynchronous oscillation of the shafting of the generator set caused by LC oscillation and power electronic components has become the focus of endangering the safe operation of the power grid and generator sets
At present, there is no mention of a feasible laboratory dynamic model test method at home and abroad, especially there is no method to stimulate the subsynchronous oscillation of the generator set
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[0014] In the present invention, the excitation of the shafting subsynchronous oscillation of the generating set can be realized by SSR-DS equipment, such as figure 1 As shown, the principle is: the analog single-mode sub-synchronous signal is sent out through the acquisition signal generator, the trigger angle of the thyristor of the SSR-DS equipment is adjusted, the current of the TCR (adjustable reactor phase) branch is changed, and the step-up transformer Feedback to the generator set, so as to realize the excitation of the subsynchronous oscillation of the shafting.
[0015] Such as figure 1 As shown, the SSR-DS device is connected to the back end of the step-up transformer 104, which can avoid the direct reactive power impact on the generator set, and can ensure the consistency of the response of multiple generator sets, so that one SSR-DS device can be realized At the same time, subsynchronous oscillation excitation is performed on multiple generators 105 connected to ...
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The invention discloses a method for exciting subsynchronous oscillation of a generator set by utilizing a subsynchronous oscillation suppression device, which comprises the following steps of: connecting the output end of a signal generator with a rotating speed sampling end of a controller of the subsynchronous oscillation suppression device; generating a signal Asin(wt) by using the signal generator, wherein w=2*pi*f, f is preset frequency, and A is signal amplitude and equal to 0; increasing the signal amplitude of the signal generated by the signal generator, simultaneously detecting the vibration of the generator set by using the subsynchronous oscillation suppression device, and stopping increasing the signal amplitude when the vibration reaches the preset vibration amplitude; and recording vibration data. Through the method, accurate and controllable shafting torsional vibration can be generated in a multiple large turbine generator set system, working conditions of various sets in a power station are simulated when subsynchronous oscillation or subsynchronous resonance is generated in a power grid, and test environment and means are provided for setting parameters of devices and equipment for suppressing subsynchronous resonance and subsynchronous oscillation and protecting the shafting of the generator set in the power station.
Description
technical field [0001] The invention relates to a method for stimulating synchronous oscillation of a generating set shaft by using a subsynchronous oscillation suppressing device. Background technique [0002] With the huge demand for large-capacity power supply and long-distance power transmission technology in my country's power grid system, in order to save investment and operating costs to a greater extent, the way of power transmission lines equipped with series compensation equipment has been widely used. [0003] In addition, technologies such as DC transmission technology and AC-DC hybrid transmission technology have gradually become the main high-voltage transmission methods in my country's power grid construction. Based on the application of the above technologies, the subsynchronous oscillation of the generator shaft system caused by LC oscillation and power electronic components has become the focus of endangering the safe operation of the power grid and generat...
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IPC IPC(8): G01R31/34
Inventor 武云生安万洙卓华顾强王绍德林惊涛张银山孙寿广李兴旺杨文超贾树旺肖述林孟会永何师吴思聪范巍
Owner CHINA SHENHUA ENERGY CO LTD
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