Method and system for monitoring low-frequency oscillation of turbo generator set speed control system

A technology of steam turbine generator set and speed control system, which is applied in the field of electric power, can solve problems such as low-frequency oscillation of the power system, system splitting, economic loss, etc., and achieve the effects of reducing the amount of data processing, ensuring the safety of the power grid, and improving economic benefits

Active Publication Date: 2014-11-05
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

Improper setting of the parameters of the turbo-generator speed control system or the presence of disturbance sources within the low-frequency oscillation frequency range may cause low-frequency oscillations in the power system, which seriously threatens the saf...

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  • Method and system for monitoring low-frequency oscillation of turbo generator set speed control system
  • Method and system for monitoring low-frequency oscillation of turbo generator set speed control system

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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0028] In the following description, firstly, the embodiments of the monitoring method for the low-frequency oscillation of the turbo-generator set speed control system of the present invention will be described, and then the various embodiments of the low-frequency oscillation monitoring system of the turbo-generator set speed control system of the present invention will be described. Be explained.

[0029] see figure 1 as shown, figure 1 It is a schematic flow chart of an embodiment of a method for monitoring low-frequency oscillation of a speed regulation system of ...

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Abstract

The invention provides a method and a system for monitoring low-frequency oscillation of a turbo generator set speed control system. The method comprises the following steps: an original power signal and an original valve opening signal on the side of a turbo generator set speed control system are acquired, and down-sampling rate processing is carried out on the original power signal and the original valve opening signal respectively to obtain a power signal and a valve opening signal; Wigner-Ville distribution transform is performed on the power signal and the valve opening signal respectively to obtain a first time-frequency distribution characteristic of energy of the power signal and a second time-frequency distribution characteristic of energy of the valve opening signal; and low-frequency oscillation of the turbo generator set speed control system is monitored according to the first time-frequency distribution characteristic and the second time-frequency distribution characteristic. By adopting the scheme of the invention, effective real-time monitoring of low-frequency oscillation of the turbo generator set speed control system is realized, the economic efficiency can be improved, and the grid security can be ensured.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and system for monitoring low-frequency oscillation of a speed regulation system of a steam turbine generator set. Background technique [0002] The phenomenon of low-frequency oscillation occurs from time to time in various regional power grids, which seriously affects the safe and stable operation of the power grid. Effective monitoring of low-frequency oscillations in power systems is the basis for analyzing and suppressing low-frequency oscillations. At present, the monitoring of low-frequency oscillations in power systems is mainly based on the Wide Area Measurement System (WAMS). The wide area measurement system consists of a synchrophasor measurement unit (Phasor Measurement Unit, PMU), a communication network, and a WAMS master station. PMU devices are installed in the main substations and power plants of the power grid. By measuring physical quantities...

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Application Information

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IPC IPC(8): G01R31/00
Inventor 蔡笋邓小文徐衍会邓少翔谭金金格
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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