Primary frequency modulation control system based on frequency droop regulation method and method thereof

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

Active Publication Date: 2015-12-30
STATE GRID CORP OF CHINA +1
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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 f...

Method used

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  • Primary frequency modulation control system based on frequency droop regulation method and method thereof
  • Primary frequency modulation control system based on frequency droop regulation method and method thereof
  • Primary frequency modulation control system based on frequency droop regulation method and method thereof

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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 a...

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Abstract

The invention discloses a primary frequency modulation control system based on a frequency droop regulation method and a method thereof, and relates to the technical field of thermal power generator set primary frequency modulation. The system structure of the actual primary frequency modulation control system based on the frequency droop regulation method is provided. The new primary frequency modulation control system comprises three parts: a load coordinated control part, a basic control part and a machine set part. The load coordinated control part comprises an absolute value calculating unit, a frequency variation range judgment unit, a droop control load instruction calculating unit, a diversity factor load instruction calculating unit, a machine furnace load control unit and a droop characteristic reference frequency calculating unit. The primary frequency modulation control strategy with mutual matching of frequency droop regulation and a fixed reference frequency control method is adopted, and the frequency modulation dead band of the power generator set is set as zero so that system frequency can be rapidly stabilized through primary frequency modulation control and the phenomenon of double hump of frequency probability distribution caused by the frequency modulation dead band can be improved, and thus power grid frequency safety can be effectively guaranteed.

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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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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