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Primary frequency modulation control method and device based on dynamic adjustment of valve flow characteristics

A technology of valve flow and dynamic adjustment, applied in control systems, circuit devices, control generators, etc., can solve problems such as inability to meet requirements

Active Publication Date: 2018-03-02
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the non-linearity of the flow characteristics of the valve, the proportional coefficient added is suitable for some valve positions, but the proportional coefficient cannot meet the requirements for some valve positions.

Method used

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  • Primary frequency modulation control method and device based on dynamic adjustment of valve flow characteristics
  • Primary frequency modulation control method and device based on dynamic adjustment of valve flow characteristics
  • Primary frequency modulation control method and device based on dynamic adjustment of valve flow characteristics

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] Such as figure 1 Shown is a schematic diagram of the logical structure of the present invention. In this schematic diagram, it includes the Δf frequency difference module where the grid frequency fluctuates, the static characteristic function F(X) module of the control system, the analog input module for outputting proportional amplification factors A1 and A2, the switching module T, and the valve control system module And the valve command output module; the frequency diffe...

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Abstract

The invention discloses a primary frequency modulation control method and device based on dynamic adjustment of valve flow characteristics. The method includes the following steps: periodically receiving feedback messages sent by the valve control system; determining the valve flow rate according to the valve opening amount in the feedback messages Characteristic state; when the grid frequency fluctuates, send a frequency modulation command according to the characteristic state of the valve flow to instruct the valve control system to adjust the valve opening amount; when the grid frequency fluctuates, the appropriate proportional amplification factor is selected according to the valve flow characteristics, Thus, the valve flow is adjusted to meet the needs of the power grid.

Description

technical field [0001] The invention relates to a control method for primary frequency regulation of a generator set, in particular to a primary frequency regulation control method and device based on dynamic adjustment of valve flow characteristics. Background technique [0002] With the increase of grid capacity, grid stability has been paid more and more attention. The primary frequency regulation function is the function of the grid-connected generator set spontaneously participating in the stable regulation of the grid in time when the grid frequency fluctuates. It is prior to the secondary frequency regulation (intermediate regulation command), which can respond to the slight fluctuations of the grid in time and correctly feed back to the grid in a timely manner. The advantage of short time and quick action is an important function to ensure the safe, efficient and stable operation of the power grid and generator sets. And because whether the input of the primary freq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02P9/04
CPCH02J3/241
Inventor 郭强张龙英郭坚王雪峰白志刚韩国强王进张小三卢辰光冯云鹏
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER