A primary frequency modulation control system and method based on frequency droop adjustment method

An adjustment method, frequency drooping technology, applied to AC network circuits, electrical components, circuit devices, etc., can solve problems affecting the correctness of CPS indicators, frequency probability distribution double peaks, grid frequency deviation from normal distribution, etc., to achieve rapid stability The effect of system frequency and grid frequency security guarantee

Active Publication Date: 2017-09-01
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

Since the current primary frequency regulation has a dead zone, the frequency probability distribution bimodal phenomenon occurs, which makes the grid frequency deviate from the normal distribution. Therefore, the existing primary frequency regulation control method will affect the correctness of the CPS index

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  • A primary frequency modulation control system and method based on frequency droop adjustment method
  • A primary frequency modulation control system and method based on frequency droop adjustment method
  • A primary frequency modulation control system and method based on frequency droop adjustment method

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Embodiment Construction

[0041] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0042] The invention provides a primary frequency modulation control method based on a frequency droop adjustment method, which introduces the droop characteristic into the primary frequency modulation frequency control, and does not need to set a primary frequency modulation dead zone for the generating set.

[0043] Frequency droop adjustment method (mode 1): Change the frequency reference value in the original primary frequency control strategy from a fixed 50Hz to a variable value based on droop characteristics, and set the dead zone of the unit to 0r / min. When the frequency fluctuation is relatively small and within the frequency (49.967Hz-50.033Hz), reduce the frequency reference value according to the droop characteristic, so that the steam turbine and the boiler perform a frequency modulation act...

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Abstract

The invention discloses a primary frequency regulation control system and method based on a frequency droop regulation method, and relates to the technical field of primary frequency regulation of thermal power generating sets. The present invention provides the system structure of the actual primary frequency regulation control system based on the frequency droop regulation method. The new primary frequency regulation control system includes three parts: the load coordination control part, the basic control part, and the unit part. The load coordination control part includes the absolute value Calculation unit, frequency range judgment unit, droop control load command calculation unit, unequal rate load command calculation unit, furnace load control unit (, droop characteristic reference frequency calculation unit. The present invention adopts frequency droop adjustment and fixed reference frequency control method The coordinated primary frequency regulation control strategy sets the frequency regulation dead zone of the generator set to zero, realizes primary frequency regulation control to quickly stabilize the system frequency and improves the frequency probability distribution double hump phenomenon caused by the frequency regulation dead zone, and provides a guarantee for the safety of the power grid frequency. effective guarantee.

Description

technical field [0001] The invention relates to the technical field of primary frequency regulation of thermal power generating sets, in particular to a primary frequency regulation control system and method based on a frequency droop regulation method. Background technique [0002] Grid frequency, as one of the three basic indicators to measure power quality, is related to the normal operation of electrical equipment and the quality of power consumption of users. When the power system is running, real-time and random changes in the load of the power system will cause real-time and random fluctuations in the grid frequency. Therefore, stabilizing the grid frequency of the power system to operate near the rated value is one of the main goals for the safe and stable operation of the power system. one. [0003] The power system primary frequency modulation control function is used to eliminate the frequency fluctuation phenomenon of the power grid caused by the first type of l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
Inventor 陶骞崔一鉑贺颖陈文游力孙建军
Owner STATE GRID CORP OF CHINA
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