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Control Method and System for Improving the Stable Performance of Primary Frequency Modulation Control of Generating Sets

A technology for generating sets and stabilizing performance, applied in the electric power field, can solve problems such as reducing the security and stability of the power grid system, and achieve the effects of avoiding repeated fluctuations and oscillations, improving security and stability, and preventing low-frequency oscillations of the system.

Active Publication Date: 2017-01-25
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0004] Based on this, it is necessary to provide a control method and system to improve the stability performance of the primary frequency regulation control of the generator set, so as to improve the security and stability of the power grid system

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  • Control Method and System for Improving the Stable Performance of Primary Frequency Modulation Control of Generating Sets
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  • Control Method and System for Improving the Stable Performance of Primary Frequency Modulation Control of Generating Sets

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[0025] 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 according to the drawings and embodiments. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0026] The basic principle of the control method and system for improving the stability performance of the primary frequency modulation control of the generator set in the present invention is: the output instruction signal in the primary frequency modulation control loop of the generator set is carried out by using a smaller time constant in the direction of the power grid frequency deviation from the rated value and in the direction of returning to the rated value. Calculate and process the first-order inertia link with a large time constant, and then use the calculated and processed signal as a new generator set...

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Abstract

The invention provides control method and system for improving one-time frequency-modulated control stability of a generator set. The method is that an output instruction signal in an one-time frequency-modulated control loop o the generator set is calculated and processed through a first-order inertia link that a relatively small time constant is adopted in a rated frequency deviation value direction of a power grid and a relatively large time constant is adopted in a rated return value direction; the calculated and processed signal is used as a new one-time frequency-modulated control output instruction signal of the generation set to replace the control output instruction in the original one-time frequency-modulated control loop of the generator set for performing one-time frequency-modulated control. According to the scheme, the method and system have the advantages that the load compensating capacity of one-time frequency-modulated action can be improved, and meanwhile, a speed regulation system and a power grid system can be prevented from resonance, which is beneficial for the suppression of low-frequency oscillation of the system, and therefore, the safety and stability of the power grid system can be improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a control method and system for improving the stability performance of primary frequency modulation control of a generating set. Background technique [0002] Power system 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. When low-frequency oscillation occurs in the power system, the frequency of the power grid will also fluctuate accordingly, causing the primary frequency modulation circuit of the generator set to make corresponding control actions according to the oscillation of the power grid frequency. The frequency modulation action is in step with the low-frequency oscillation of the power grid, which may easily cause res...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
Inventor 朱亚清张曦黄卫剑伍宇忠
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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