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Floating frequency difference regulation and variable rate load instruction modification-based primary frequency regulation method

A technology of load command and variable speed, which is applied in the field of primary frequency regulation of thermal power generating sets, can solve problems affecting the safe and stable operation of generating sets, achieve the effects of reducing output, meeting frequency regulation requirements, and maintaining stability

Active Publication Date: 2014-04-16
STATE GRID HUBEI ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In severe cases, some parameters of the unit are even close to the bottom limit of safe operation of the unit, which affects the safe and stable operation of the generator set

Method used

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  • Floating frequency difference regulation and variable rate load instruction modification-based primary frequency regulation method
  • Floating frequency difference regulation and variable rate load instruction modification-based primary frequency regulation method
  • Floating frequency difference regulation and variable rate load instruction modification-based primary frequency regulation method

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Experimental program
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Effect test

Embodiment Construction

[0063] Further illustrate below in conjunction with accompanying drawing and embodiment:

[0064] 1. This primary frequency regulation system (single regulation loop)

[0065] 1. Overall

[0066] like figure 2 , 3 , This primary frequency regulation system includes host equipment: steam turbine regulating valve opening calculation unit 100, steam turbine DEH regulating servo card 200, steam turbine inlet steam regulating valve group 201, unit load command calculation unit 300, boiler coal feeder command calculation unit 400, Coal machine motor 401, boiler feed water pump instruction calculation unit 600, steam-driven feed pump 601, boiler blower instruction calculation unit 700 and blower motor 701;

[0067] Its connection relationship is:

[0068] The steam turbine regulating valve opening calculation unit 100, the steam turbine DEH regulating servo card 200, and the steam turbine inlet regulating valve group 201 are connected in sequence to realize the control of the st...

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Abstract

The invention discloses a floating frequency difference regulation and variable rate load instruction modification-based primary frequency regulation method, and relates to the technical field of primary frequency regulation of a thermal generator set. An industrial control server is used as a core of a primary frequency regulation controller, and a corresponding peripheral communication port is configured; and a software control module of the primary frequency regulation controller comprises a quick frequency time delay calculation unit, an absolute value calculation unit, a frequency change rate judgment unit, a holding pulse calculation unit, a universal frequency time delay calculation unit, a diversity factor gain calculation unit, a diversity factor curve function calculation unit, a compensation limiting unit and an analog quantity instruction output selection unit. According to the primary frequency regulation method, floating frequency difference regulation and variable rate load instruction modification are adopted and a primary frequency regulation system emergency compensation mode is introduced; and effective guarantee is provided for safety of the frequency of a power grid. The method is suitable for the power grid with characteristics of small scale, frequent frequency fluctuation, high amplitude of variation and long stable period.

Description

technical field [0001] The invention relates to the technical field of primary frequency regulation of thermal power generating units, in particular to a primary frequency regulation method based on floating frequency difference adjustment and variable rate load command correction; Power grids with long periods of stability. Background technique [0002] The frequency of the power system is one of the most important parameters in the operation of the power system. The change of the frequency of the power system will have a serious impact on the safe operation of the generator and the system. Controlling the frequency of the power system within a small range of changes is the safety of the power system. The main goal of stable operation. [0003] The primary frequency modulation control function is one of the basic and necessary functions for the grid-connected operation of the steam turbine generator set, which is specifically realized by the primary frequency modulation co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38H02P9/04
Inventor 潘杨贾庆岩
Owner STATE GRID HUBEI ELECTRIC POWER RES INST
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