A method for intelligent primary frequency regulation of generator sets

A generator set, intelligent technology, applied in the direction of single-net parallel feeding arrangement, reducing/preventing power oscillation, etc., can solve the problems of generator set frequency modulation device shaking, increased equipment wear, equipment damage, etc., to prolong life and reduce frequency modulation wear , Eliminate the shaking effect

Active Publication Date: 2017-06-23
SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in this frequency modulation mode, due to the rapid oscillation of the grid frequency, the frequency modulation device of the generator set shakes, and the wear and tear of the equipment increases, which will seriously cause equipment damage

Method used

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  • A method for intelligent primary frequency regulation of generator sets
  • A method for intelligent primary frequency regulation of generator sets
  • A method for intelligent primary frequency regulation of generator sets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the conventional primary frequency regulation function, when the grid frequency changes beyond the dead zone, the generator set quickly changes the output of the generator set through feedforward and other methods. If the required value is reached, if the output change exceeds the required value, the PID of the controller will be reversed to make the output change equal to the required value. In the process of grid frequency recovery (frequency difference reduction), the frequency regulation effect of the generator set will be weakened synchronously in proportion to suppress The frequency modulation performance of the generator set, in addition, due to the rapid oscillation of the grid frequency, the frequency modulation device of the generator set is prone to shaking. Such as Figure 5 It is a routine frequency regulation action process. The output of the generator set increases rapidly due to the decrease of the grid frequency, and then decreases rapidly ...

Embodiment 2

[0033] "Intelligent frequency modulation" can realize "quick movement and slow return" through the direction locking of the control system, and can also Figure 4 The method of controller input and output limitation and other methods is realized, such as the speed limit or inertia when the frequency modulation command is returned to realize the "fast movement and slow return" primary frequency modulation function.

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Abstract

The invention relates to a method for intelligent primary frequency regulation of a generating set, which adopts the method of "fast movement and slow return" or "fast movement and slow return" to realize frequency regulation, comprising the following steps: 1) the intelligent frequency regulation module collects the frequency of the power grid in real time to obtain the frequency difference of the power grid; 2) The intelligent frequency regulation module judges whether the frequency difference of the power grid is within the dead zone range, if not, execute step 3); 3) The intelligent frequency regulation module further judges whether the frequency difference of the power grid is higher than or lower than the dead zone range, if it is higher than For the maximum value of the dead zone range, perform step 4), if it is lower than the minimum value of the dead zone range, then perform step 5); 4) The intelligent frequency modulation module sends a high-frequency closed-increase signal to the PID power controller, and the output of the PID controller is blocked to increase Unit power; 5) The intelligent frequency modulation module sends a low-frequency closing and decreasing signal to the PID power controller, and the output of the PID controller is blocked to reduce the unit power. Compared with the prior art, the invention has the advantages of improving the quality of grid frequency control and the like.

Description

technical field [0001] The invention relates to a generator set frequency regulation technology, in particular to an intelligent primary frequency regulation method for a generator set. Background technique [0002] The grid frequency is the basis for the balance between power generation output and power load. When the power generation output is equal to the power load, the grid frequency is stable; when the power generation output is greater than the power load, the grid frequency increases; Reduced frequency. Primary frequency regulation refers to the automatic control process that once the frequency of the grid deviates from the rated value, the control system of the unit in the grid automatically controls the increase or decrease of the active power of the unit, limits the change of the grid frequency, and keeps the grid frequency stable. [0003] figure 1 It is the principle diagram of the primary frequency regulation of the existing generating set. When the grid freq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/38
Inventor 沈丛奇归一数程际云胡静
Owner SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG
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