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Double input PSS experiment method

An experimental method, dual-input technology, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve the problems of unable to verify PSS, unable to verify and so on

Active Publication Date: 2011-10-26
NARI TECH CO LTD +2
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  • Abstract
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to overcome the fact that the existing double-input PSS experimental method cannot verify the effect of the PSS function in a full range, especially whether the mechanical angular velocity signal of the first channel input signal in the double-input PSS can be verified when the low-frequency oscillation of the power grid occurs. Play a role in suppressing the low-frequency oscillation of the power grid

Method used

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] The experimental method of double-input PSS of the present embodiment, it is based on such as figure 2 The shown one is realized by shielding the channel and modifying the passband of the ramp function. In the experimental method, the experimental method of shielding one of the channels can effectively check whether the dual-input PSS can be in the full frequency range of the PSS effect Play the method of suppressing low-frequency oscillation and improving the stability of the power grid. The experimental method includes two parts: the first channel experiment and the second channel experiment:

[0031] The experimental method of the first channel is as follows: disconnect the output of the second channel or set the gain of the second channel to zero to ensure that only the first channel works in PSS, and let the first channel input signal by modifying the pas...

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Abstract

The invention discloses a double input PSS experiment method which comprises a first channel input signal and a second channel input signal. The first channel input signal is a signal of mechanical angular velocity and the second channel input signal is an electrical power input signal. The method comprises the following steps: 1. shielding the second channel and verifying an effect of the first channel input signal on inhibiting electrical-network low-frequency oscillation through modifying ramp function passband; 2. shielding the first channel and verifying an effect of the second channel input signal on inhibiting electrical-network low-frequency oscillation through modifying the ramp function passband. In the invention, the double input PSS can be effectively verified whether the double input PSS can have effect on inhibiting low-frequency oscillation in a full frequency range with the effect of the PSS through shielding one of the channels. Stability of the electrical network canbe raised.

Description

technical field [0001] The invention relates to an experimental method for an auxiliary function power system stabilizer (PSS) of a generator excitation system, in particular to an experimental method for double-input PSS effect verification, and belongs to the technical field of network source coordination. Background technique [0002] With the continuous expansion of the scale of the power system and the continuous application of new technologies, the gradual development of the national power system interconnection, the commissioning of ultra-high voltage long-distance transmission lines and the application of fast excitation systems using silicon controlled rectifiers, the excitation system The gain becomes larger, the time constant is greatly reduced, and the damping of the system is reduced. The power grid system with weak electrical connection even has negative damping, and the frequency of low-frequency oscillation in the power system is on the rise. [0003] In orde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 许其品许其质徐蓉
Owner NARI TECH CO LTD
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