Active power control system and control method of power plant

An active power and control system technology, applied in the active power control system and control field of power plants, can solve the problems of long recovery time and reduced flexibility

Active Publication Date: 2016-03-02
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects of long recovery time and reduced flexibility caused by cutting off the feeder of the wind farm in the wind farm or setting the planned value in advance to control the power transmission in the prior art, and to provide a A control system capable of controlling the sequence of increase and decrease in active power of wind turbines and water-fired turbines in a wind farm, and a control method realized by using the control system

Method used

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  • Active power control system and control method of power plant
  • Active power control system and control method of power plant
  • Active power control system and control method of power plant

Examples

Experimental program
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no. 1 example

[0086] Such as figure 1 As shown, the control system of the active power of the power plant of the present embodiment comprises a first judging module 1, a second judging module 2, a third judging module 3, a fourth judging module 4, a fifth judging module 5 And an active power control module 6 .

[0087] The first judging module 1 first judges whether the absolute value of the regional control deviation A is greater than a first threshold B, if yes, activates the second judging module 2, and if not, does not perform any operation.

[0088] In order to avoid too frequent adjustment of the active power of the wind farm, the first threshold B is preset. As long as the absolute value of the regional control deviation A does not exceed the first threshold B, it means that the power transmission can basically meet the requirements. At this time, there is no need to adjust the active power delivered by the wind farm. Only when the absolute value of the regional control deviation A...

no. 2 example

[0108] Such as image 3As shown, the control system of the active power of the power plant of the present embodiment includes a first judging module 10, a second judging module 20, a third judging module 30, a fourth judging module 40 and an active power control module 60 , the difference between this embodiment and the first embodiment is: in this embodiment, when the regional control deviation A is greater than zero and greater than the first threshold B, no longer continue to judge whether the regional control deviation A is greater than the second threshold C, Instead, the active power control module 60 is directly invoked to reduce the active power of the water-fired power unit, and the rest of the comparison and judgment, operation execution, etc. are the same as those of the first embodiment.

[0109] Such as Figure 4 As shown, the present invention utilizes the active power control system of the power plant of this embodiment to realize the control method of the acti...

no. 3 example

[0119] Such as Figure 5 As shown, the control system of the active power of the power plant of the present embodiment includes a first judging module 11, a second judging module 21, a third judging module 31, a fourth judging module 41 and an active power control module 61 , the difference between this embodiment and the first embodiment is that in this embodiment, a range of allowable fluctuations is no longer set for the regional control deviation A, that is, in the specific implementation process, the regional control deviation A is no longer consistent with the Compared with the first threshold B, it is directly compared with zero, that is, only when the control deviation A of the area is equal to zero, the control and regulation of the active power of the wind farm will be stopped, instead of as long as in the first embodiment If the absolute value of the regional control deviation A is not greater than the first threshold B, the active power of the wind farm will not be...

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Abstract

The invention discloses a control system and control method of active power of a power plant by a main station at a power network dispatching side. The control system comprises a first determination module, a second determination module, a third determination module and an active power control module. The first determination module is used for determining whether an area control deviation is greater than or smaller than zero; the second determination module is used for determining whether the area control deviation is greater than or equal to zero, and determining whether the active power of hydraulic and thermal power units is reduced to a minimum value; the third determination module is used for determining whether the area control deviation is smaller than or equal to zero, and determining whether the active power of a wind turbine is increased to a maximum value; and the active power control module is used for increasing or reducing the active power of the hydraulic and thermal power units or the wind turbine. According to the invention, the increase and reduction of the active power of the wind turbine and the hydraulic and thermal power units and the processing priority sequence are controlled, so that full acquisition of wind power can be guaranteed to the greatest extent under the condition that the electrical network safety is ensured.

Description

technical field [0001] The present invention relates to a control system and control method of active power of a power plant, in particular to a control system capable of controlling the sequence of increase and decrease of active power of wind turbines and water-fired generators in a wind farm and the use of the control system Implemented control method. Background technique [0002] Most of the existing wind farms are equipped with wind turbines and water-fired generators respectively. In the wind farms, the feeder lines of the wind farms are basically cut off to control the power delivered by the wind farms to the grid, so as to avoid the safety of the grid caused by excessive power. Problem, but this way it takes a long time for normal power delivery to resume after the feeder is cut. Another method is to set a planned value of the power to be delivered in advance, so that the wind farm can refer to the planned value at any time to perform operations, but this method is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
Inventor 刘纯冯双磊王勃姜文玲卢静张菲车建峰杨红英赵艳青
Owner CHINA ELECTRIC POWER RES INST
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