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Control system and control method of active power 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: 2014-05-07
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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  • Control system and control method of active power of power plant
  • Control system and control method of active power of power plant
  • Control system and control method of active power of power plant

Examples

Experimental program
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no. 1 example

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

[0087] The first judging module 1 first judges whether the absolute value of the zone control deviation A is greater than a first threshold B, if so, the second judging module 2 is activated, and if not, no operation is performed.

[0088] In order to avoid adjusting the active power of the wind farm too frequently, 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. The power demand of the grid does not need to adjust the active power delivered by the wind farm at this time. Only when the absolute value of the regional control deviati...

no. 2 example

[0108] Such as image 3 As shown, the active power control system of the power plant of this embodiment includes a first determination module 10, a second determination module 20, a third determination module 30, a fourth determination module 40, and an active power control module 60 The difference between this embodiment and the first embodiment is: in this embodiment, when the area control deviation A is greater than zero and greater than the first threshold value B, it will not continue to determine whether the area control deviation A is greater than the second threshold value C, However, the active power control module 60 is directly invoked to reduce the active power of the hydro-thermal power unit, and the rest of the comparison judgment, operation execution, etc. are the same as the first embodiment.

[0109] Such as Figure 4 As shown, the method for controlling the active power of a power plant realized by the present invention using the control system of the active powe...

no. 3 example

[0119] Such as Figure 5 As shown, the active power control system of the power plant of this embodiment includes a first determination module 11, a second determination module 21, a third determination module 31, a fourth determination module 41, and an active power control module 61 The difference between this embodiment and the first embodiment is that in this embodiment, an allowable fluctuation range 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 different from the The first threshold B is compared, and directly compared with zero, that is, only when the zone control deviation A is equal to zero, will the active power of the wind farm be controlled and adjusted, instead of just 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 controlled.

[0120] Suc...

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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 invention relates to a control system and a control method for the active power of a power plant, in particular to a control system capable of controlling the increase and decrease of the active power of a wind power unit and a hydrothermal power unit of a wind farm and the use of the control system Realized control method. Background technique [0002] Most of the existing wind farms are equipped with wind turbines and hydro-thermal turbines. In wind farms, the power delivered by the wind farm to the grid is basically controlled by cutting off the feeder of the wind farm, so as to avoid excessive power leading to safety in the grid. Problem, but this method will cause a long time to resume normal power delivery after the feeder is cut. Another 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 difficult to change once the planned ...

Claims

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Application Information

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Patent Type & Authority Applications(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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