Supplementary subsynchronous damping control method of speed regulator

A damping control and governor technology, applied in the direction of reducing/preventing power oscillation, etc., can solve the problems of difficult parameter design, poor suppression effect, high cost, etc.

Active Publication Date: 2012-11-07
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

These methods alleviate the subsynchronous oscillation to a certain extent, but there are sti

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  • Supplementary subsynchronous damping control method of speed regulator
  • Supplementary subsynchronous damping control method of speed regulator
  • Supplementary subsynchronous damping control method of speed regulator

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Embodiment Construction

[0019] The invention proposes a speed governor additional sub-synchronous damping control method.

[0020] The embodiments of the present invention will be further described below in conjunction with the drawings and examples. Such as figure 1 As shown, the present invention provides a speed governor additional sub-synchronous damping control method, the additional sub-synchronous damping control method specifically includes the following steps: filtering, amplification, phase compensation, clipping, and superposition.

[0021] The IEEE working group published an article on IEEE Transactions on Power Apparatus and Systems in 1977, recommending a standard model for studying subsynchronous oscillations——IEEE SSR first standard model. The testing system that the present invention adopts is based on IEEE SSR first standard model, such as figure 1 The steps shown are: filtering, amplification, phase compensation, limiting, and superposition. The rated capacity of the generator is...

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Abstract

The invention discloses a supplementary subsynchronous damping control method of a speed regulator, belonging to the technical field of subsynchronous oscillation control of a power system. The method specifically comprises the following steps of: filtering, amplification, phase compensation, amplitude limiting and superposition. Power generator rotating speed deviation signals are used as input signals and the input signals are filtered to obtain subsynchronous rotating speed deviation signals of all modes; and amplification, phase compensation, amplitude limiting and superposition are conducted to the subsynchronous rotating speed deviation signals of all modes, amplitude limiting is conducted to the superposed signals to generate supplementary control signals delta Ugs of the speed regulator of a turbine generator set, and the supplementary control signals delta Ugs are connected with the output end of the speed regulator and are superposed with valve opening control signals output by the speed regulator, so as to regulate mechanical torque output by a turbine. By enhancing the mechanical damping of the shaft system of the generator set, subsynchronous oscillation caused by series compensation devices, direct current transmission devices and other devices can be effectively suppressed.

Description

technical field [0001] The invention belongs to the technical field of power system subsynchronous oscillation control. In particular, it relates to a control method for additional sub-synchronous damping of a speed governor. Background technique [0002] With the continuous increase of single unit capacity in the power system, the large increase in long-distance series compensation projects and high-voltage direct current transmission projects, my country's power grid has entered the era of large-capacity, ultra-high voltage, long-distance, and AC-DC hybrid transmission. The complex grid structure and operation mode make the problem of Subsynchronous Oscillation (SSO) increasingly prominent. Subsynchronous oscillation will lead to fatigue accumulation and even fracture of the large shaft of the turbogenerator, seriously affecting the safe and stable operation of the power system. [0003] According to the survey, my country's Inner Mongolia Tuoketuo Power Plant, Shangdu Po...

Claims

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Application Information

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IPC IPC(8): H02J3/24
Inventor 杨琳肖湘宁郭春林
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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