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Method for controlling power system stabilizer on primary frequency modulation nonlinear speed regulation side of generator set

A generator set and power system technology, applied in the field of electric power, can solve the problems of deteriorating low-frequency oscillation of the system, power system stability, low safety of generator sets, and poor low-frequency oscillation suppression effect.

Active Publication Date: 2015-04-01
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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Problems solved by technology

[0006] Aiming at the low-frequency oscillation suppression effect of the above-mentioned oscillation suppression method is poor, leading to the problem of low stability of the power system and the safety of the generating set, avoiding the occurrence of low-frequency oscillation that the steam turbine speed control system provides negative damping and deteriorates the system, the purpose of the present invention It provides a power system stabilizer control method on the nonlinear speed regulation side of the primary frequency modulation of the generating set

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  • Method for controlling power system stabilizer on primary frequency modulation nonlinear speed regulation side of generator set
  • Method for controlling power system stabilizer on primary frequency modulation nonlinear speed regulation side of generator set
  • Method for controlling power system stabilizer on primary frequency modulation nonlinear speed regulation side of generator set

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Embodiment Construction

[0048] The present invention can be realized by programming on DCS (Distributed Control System, DCS), PLC (Programmable Logic Controller, PLC), single-chip microcomputer or computer. In order to make the patent easier to understand, the patent will be further elaborated below in conjunction with the drawings, but the embodiments in the drawings do not constitute any limitation to the patent.

[0049] Such as figure 1 As shown, according to the calculation and processing of the following steps 1 to 4, the output command signal in the primary frequency modulation control loop of the generator set is calculated and processed by nonlinear speed limit, and the steps are as follows:

[0050] Step 1. Send the output command signal in the primary frequency modulation control loop of the generator set to the IN input terminal of the calculation processing loop, and decompose the IN signal into D 1 and D f For a two-component signal, proceed as follows:

[0051] D. 1 =(1-K r ) IN ...

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Abstract

The invention discloses a method for controlling a power system stabilizer on the primary frequency modulation nonlinear speed regulation side of a generator set. According to the method, nonlinear speed limit calculation processing is performed on an output command signal in a primary frequency modulation control circuit of the generator set, and the signal subjected to the calculation processing serves as a new primary frequency modulation control output command signal of the generator set and replaces a control output command in an original primary frequency modulation control circuit of the generator set to carry out primary frequency modulation control. Due to the fact that the nonlinear speed limit calculation processing is performed on the primary frequency modulation control command of the generator set, the method has the advantages of being convenient to implement, simple in parameter setting, strong in robustness and the like.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a control method for a power system stabilizer on the primary frequency modulation nonlinear speed regulation side of a generating set. Background technique [0002] Low-frequency oscillation is a phenomenon that is not conducive to the safe and stable operation of the power system. It will seriously affect the stability of the power system and the safe operation of the generator set, and even cause damage to the power system and lead to large-scale blackouts. A common solution to suppress low-frequency oscillation of the system is that the power system stabilizer (PSS) acts on the excitation system of the generator set. However, since the excitation system is closely related to the power system and its operating mode and working conditions, the coordinated design of PSS in the power system and the selection of the installation site have become the key and difficulty of w...

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/002H02J3/24
Inventor 朱亚清张曦黄卫剑伍宇忠
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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