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A Frequency Control Method Based on Wind Power Absorption

A frequency control and wind power consumption technology, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as the inability to meet the needs of the power grid frequency regulation situation, the inability to eliminate the adverse effects of wind power grid connection, and the hidden dangers of power grid frequency safety. Improve system frequency characteristics, reduce power generation costs, and have good frequency control effects

Active Publication Date: 2021-11-02
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Description
  • Claims
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Problems solved by technology

At present, with the continuous popularization of UHV AC and DC lines and the implementation of national energy-saving and environmental protection policies, the amount of wind power grid-connected has increased on a large scale, but at the same time, the grid-connected space of conventional units has been greatly occupied, reducing the system inertia and frequency. Responsiveness is reduced, which greatly affects the efficiency of wind power consumption and poses a great potential safety hazard to the frequency security of the power grid. However, the traditional power grid frequency control method has been unable to eliminate the adverse effects of wind power grid integration and cannot meet the increasingly severe grid frequency regulation situation. need

Method used

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  • A Frequency Control Method Based on Wind Power Absorption
  • A Frequency Control Method Based on Wind Power Absorption
  • A Frequency Control Method Based on Wind Power Absorption

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Embodiment Construction

[0049] In order to better understand the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings.

[0050] Modeling and simulation is carried out using a single-unit two-area system. The block diagram of the system model is shown infigure 1 , where sub-area i is the wind power disturbance area, and area j is the non-disturbance area. In order to simplify the calculation, the simulation analysis is carried out with concentrated parameters; as figure 1 Shown, B i , B j is the frequency deviation coefficient; a i , b i is the distribution coefficient for ACE; R i , R j is the adjustment coefficient; ACE i 、ACE j is the regional control deviation; T g,i , T g,j is the governor time constant; T t,i , T t,j is the steam turbine time constant; H i 、H j is the inertial time constant of the system; D i 、D j is the system load damping constant; ΔP g,i , ΔP g,j is the output power of...

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Abstract

The invention discloses a frequency control method based on wind power consumption. The steps include: A. calculating the wind power deviation of each sub-area in the control area; B. calculating the total wind power deviation of all sub-areas in the control area; C. The total wind power deviation is allocated to each sub-area of ​​the control area to adjust the regional control deviation, and calculate the adjusted regional control deviation after the dynamic adjustment of each sub-area; D. According to the size of the adjusted regional control deviation, the automatic power generation control of the corresponding sub-area The system issues control commands to the generating units in the sub-area to realize frequency modulation control; the invention can fairly share the frequency modulation responsibilities among the various sub-areas of the control area, thereby improving the current situation of power grid frequency adjustment, so as to realize the maximum degree of frequency modulation capabilities among sub-areas Complementary to ensure the safe and stable operation of the grid while improving the wind power consumption capacity of the grid.

Description

technical field [0001] The invention relates to the technical field of power grid equipment, in particular to a frequency control method based on wind power accommodation. Background technique [0002] Our country has a vast territory and complex topography. Therefore, according to different terrains, power generation methods are also different. Among them, wind power generation is mostly concentrated in the "Three North Regions", which has unfriendly characteristics such as strong volatility, intermittency, and reverse peak regulation, and the phenomenon of wind abandonment is very serious. Grid-connected wind power refers to medium and large-scale wind turbines with hundreds to thousands of wind turbines installed in the wilderness and operated in grid connection. They are controlled and managed by computers and transmit powerful power to the grid. At present, with the continuous popularization of UHV AC and DC lines and the implementation of national energy-saving and en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/386H02J3/24H02J2203/20Y02E10/76
Inventor 饶宇飞李晓萌张振安赵阳刘巍王骅李程昊田春笋崔惟潘雪晴刘娆刘柳
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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