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Active control method and system of new-energy power plant

A control method and power plant technology, applied in the direction of single-grid parallel feeding arrangement, etc., can solve the problems of not being able to give full play to the frequency regulation capability of new energy power plants, and unable to realize active frequency regulation of new energy power plants.

Active Publication Date: 2017-05-17
SHENZHEN HOPEWIND ELECTRIC CO LTD
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Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is to provide a new energy power plant active power control method, which overcomes the defects that the existing technology cannot realize the active frequency regulation of the new energy power plant and cannot fully utilize the frequency regulation capability of the new energy power plant itself
[0006] The second technical problem to be solved by the present invention is to provide a new energy power plant active power control system, which overcomes the defects that the existing technology cannot realize the active frequency regulation of the new energy power plant and cannot fully utilize the frequency regulation capability of the new energy power plant itself

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other Embodiment approach

[0100] In other implementation manners, the compensation value determination sub-module can also only use the deviation Δf of the frequency connected to the power grid to determine the compensation value ΔP given by the active power of the power plant, specifically: set the lower limit of the frequency deviation threshold Δf of the connected power grid 1 and access grid frequency deviation threshold upper limit Δf 2 ; when Δf 1 ≤Δf≤Δf 2 , ΔP=0; when Δf1 , ΔP=-k p Δf; when Δf>Δf 2 , ΔP=-k p Δf; where k p is a coefficient, which is generally greater than 1, and is configured according to the capacity of the power plant and the situation of the grid involved; generally, Δf is taken 1 less than 0, Δf 2 If it is greater than 0, configure the actual value according to the capacity of the power plant and the situation of the grid involved.

[0101] (4) Limiting sub-module, used for limiting the given compensation value ΔP of the active power of the power plant.

[0102] The c...

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Abstract

The invention relates to an active control method and system of a new-energy power plant. The method includes: receiving an active power instruction accessing a power grid, and determining the active power basic value and compensation value of the power plant; adding the basic value to the compensation value to obtain the active power comprehensive value of the power plant; determining the active power actual set value of the power plant according to the comprehensive value; distributing the actual set value to each power generating unit of the power plant. The system comprises a basic value and compensation value calculation module, a comprehensive value calculation module, a set value calculation module and a set value distribution module and is used for implementing the method. The active control method and system has the advantages that the active power actual set value of the power plant is determined according to the received power grid scheduled frequency modulation instruction and the current generable active power upper limit of the power plant, the active power actual set value is distributed to each power generating unit of the power plant, and the self-frequency modulation ability of the power plant is brought into full play; fast response is achieved, and frequency modulation precision is increased greatly.

Description

technical field [0001] The invention relates to a method for active power control of a new energy power plant, and also relates to a system for active power control of a new energy power plant. Background technique [0002] Grid frequency is one of the three major indicators of power quality, and ensuring grid frequency stability and qualified grid frequency is one of the important tasks of grid dispatching and operation. As an important part of the power system, frequency regulation is to adjust the active power of the generator to follow the load changes in time to ensure the frequency stability of the power system. [0003] With the rapid development of wind power, photovoltaic and other new energy power stations, their proportion in the total installed capacity of the power grid is increasing, and the support characteristics of new energy power stations to the power grid are getting more and more attention. One of the industry development trends It is to develop the pow...

Claims

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Application Information

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IPC IPC(8): H02J3/48
CPCH02J3/48
Inventor 朱成中周党生吕一航
Owner SHENZHEN HOPEWIND ELECTRIC CO LTD
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