CN106208852B - A kind of fired power generating unit primary frequency modulation spare capacity control strategy optimization method - Google Patents
A kind of fired power generating unit primary frequency modulation spare capacity control strategy optimization method Download PDFInfo
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- CN106208852B CN106208852B CN201610535099.4A CN201610535099A CN106208852B CN 106208852 B CN106208852 B CN 106208852B CN 201610535099 A CN201610535099 A CN 201610535099A CN 106208852 B CN106208852 B CN 106208852B
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- primary frequency
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- vapour pressure
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/20—Special adaptation of control arrangements for generators for steam-driven turbines
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- Power Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
A kind of fired power generating unit primary frequency modulation spare capacity control strategy optimization method, step are：(1) unit main vapour pressure is divided into k sections, confirms the comprehensive valve position maximum primary frequency modulation amount of each pressure stage；(2) the primary frequency modulation spare capacity limits value for ensureing that the sides DEH primary frequency modulation normally acts on is determined；(3) correction value of the sides CCS primary frequency modulation spare capacity is determined；(4) (two) step is combined to can determine the primary frequency modulation spare capacity computational methods of unit with (three) step.Remarkable advantage of the present invention is, when fired power generating unit DEH hands over CCS remote controls, no matter unit operation is in manual valve control mode, also it is operate in CCS modes, the comprehensive valve position opening degree instruction of unit has certain primary frequency modulation spare capacity, can prevent from reaching the case where 100% unit primary frequency modulation can not be acted on normally because of comprehensive valve seat opening.Meanwhile improving the economy of unit operation and the stability of mains frequency.
Description
Technical field
It is that one kind can guarantee that fired power generating unit primary frequency function is normal the invention belongs to Power Plant Thermal automation field
The control method of effect.
Background technology
Currently, domestic thermal power generation unit primary frequency function is mainly realized in the sides unit CCS and the sides DEH.And work as unit
When main vapour pressure is relatively low, in order to ensure that unit load is stable or increases unit load, the synthesis valve seat opening of unit can usually reach
To absolutely.At this point, if mains frequency reduces, since comprehensive valve position has been full of, the positive primary frequency modulation amount of unit can not
Normal effect, this directly affects the stabilization of mains frequency.Therefore, fired power generating unit primary frequency modulation spare capacity control strategy is studied
As an urgent demand.
Method through the invention, when unit normal operation is in CCS remote control modes, it is ensured that unit all has at any time
Enough primary frequency modulation spare capacities, can responsive electricity grid frequency at any time variation, improve the safety operation level of power grid.
Currently, the research of fired power generating unit primary frequency modulation spare capacity control method is still in blank stage, what we studied
It is to the effect that built by carrying out logic in fired power generating unit master control system, to ensure that unit has enough primary frequency modulations
Spare capacity.This method does not increase the expense of procuring equipment, and realization rate is easy, easy.
The relevant technological approaches of the present invention and the key content of implementation are not disclosed.
Invention content
The purpose of the present invention is：A kind of control that can ensure fired power generating unit and have enough primary frequency modulation spare capacities is provided
Method processed, it is perfect by being optimized to fired power generating unit primary frequency modulation classic control strategy, it ensure that the sides fired power generating unit DEH are primary
Frequency modulation function can normally be acted on the sides CCS primary frequency function in full load mode, improve the economy of unit operation,
Improve the security and stability of mains frequency.
What the object of the invention was realized in：
(1) unit main vapour pressure is divided into k sections, confirms the comprehensive valve position maximum primary frequency modulation amount of each pressure stage
According to unit main vapour pressure Fixed slip fixed curve, main vapour pressure is divided into k sections, determines unit operation in each pressure respectively
Comprehensive valve position maximum primary frequency modulation amount when power section；
Wherein, Fvmax(Pt)-corresponding with main vapour pressure unit comprehensive valve position maximum primary frequency modulation amount；
Fvmax1- for determine after first main vapour pressure section comprehensive valve position maximum primary frequency modulation amount；
Fvmaxi- for determine after i-th of main vapour pressure section comprehensive valve position maximum primary frequency modulation amount；
Fvmaxk- for determine after k-th of main vapour pressure section comprehensive valve position maximum primary frequency modulation amount；
Pt- it is unit main vapour pressure；
Ptmin- be unit normal operation when minimum main vapour pressure；
Ptmax1- be first main vapour pressure section upper pressure limit；
Ptmini- be i-th of main vapour pressure section low pressure limit；
Ptmaxi- be i-th of main vapour pressure section upper pressure limit；
Ptmink- be k-th of main vapour pressure section low pressure limit；
Ptmax- be unit normal operation when maximum main vapour pressure；
(2) the comprehensive valve position maximum primary frequency modulation amount confirmed according to (one) step determines and is ensureing the sides DEH primary frequency modulation just
The primary frequency modulation spare capacity limits value often acted on
To enable the primary frequency function during unit operation to be operating normally, it is necessary to assure unit has enough primary
Frequency modulation acts allowance；Since fired power generating unit primary frequency function is realized in the sides DEH and the sides CCS respectively, by by the sides unit CCS work(
The PID output upper limits of rate control automated manner and the output upper limit of manual operator are limited, to ensure the primary frequency modulation of the sides DEH
Function normally acts on；Output the upper limit limits value be：
fFvmax1=100-Fvmax(Ft)
Wherein, fFvmax1The output for the sides CCS the power control PID and manual operator that the sides-guarantee DEH primary frequency modulation normally acts on
The upper limit；
Fvmax(Pt)-corresponding with main vapour pressure unit comprehensive valve position maximum primary frequency modulation amount；
(3) correction value of the sides CCS primary frequency modulation spare capacity is determined
(2) step determines the output upper limit when primary frequency modulation is operating normally, it is possible to influence the primary frequency modulation of the sides CCS
Function, in order to ensure that the sides CCS primary frequency modulation can be acted on normally, it must be determined that the correction value of the sides CCS primary frequency modulation spare capacity：
Wherein, fFvCCS- it is the sides CCS primary frequency modulation spare capacity correction value；
FreqMWThe corresponding load primary frequency modulation amount of-current frequency；
FreqMWmaxThe peak load primary frequency modulation amount of-unit；
(4) (two) step is combined to can determine the primary frequency modulation spare capacity computational methods of unit with (three) step, such as
Under：
fFvmax=fFvCCS+fFvmax1=fFvCCS+100-Fvmax(Pt)
Wherein, fFvmax- it is unit primary frequency modulation spare capacity；
Set finally determining unit primary frequency modulation spare capacity to the PID of the sides unit CCS power control automated manner
With the output upper limit of manual mode manual operator, you can ensure that primary frequency function of the unit under any operating mode can normally be made
With.
The invention has the advantages that no matter thermal power unit operation is in manual valve control mode, it is also operate in CCS controlling parties
The comprehensive valve position opening degree instruction of formula, unit is provided with enough primary frequency modulation spare capacities, ensures unit the one of full load section
Secondary frequency modulation function normally acts on, and improves percentage contribution of the fired power generating unit to mains frequency stability to greatest extent.
Description of the drawings
Fig. 1 is fired power generating unit primary frequency modulation spare capacity control strategy block diagram of the present invention.
Specific implementation mode
(1) unit main vapour pressure is divided into k sections, confirms the comprehensive valve position maximum primary frequency modulation amount of each pressure stage
According to unit main vapour pressure Fixed slip fixed curve, main vapour pressure is divided into k sections, determines unit operation in each pressure respectively
Comprehensive valve position maximum primary frequency modulation amount when power section；
Wherein, Fvmax(Pt)-corresponding with main vapour pressure unit comprehensive valve position maximum primary frequency modulation amount；
Fvmax1- for determine after first main vapour pressure section comprehensive valve position maximum primary frequency modulation amount；
Fvmax1- for determine after i-th of main vapour pressure section comprehensive valve position maximum primary frequency modulation amount；
Fvmaxk- for determine after k-th of main vapour pressure section comprehensive valve position maximum primary frequency modulation amount；
Pt- it is unit main vapour pressure；
Ptmin- be unit normal operation when minimum main vapour pressure；
Ptmax1- be first main vapour pressure section upper pressure limit；
Ptmini- be i-th of main vapour pressure section low pressure limit；
Ptmaxi- be i-th of main vapour pressure section upper pressure limit；
Ptmink- be k-th of main vapour pressure section low pressure limit；
Ptmax- be unit normal operation when maximum main vapour pressure；
(2) the comprehensive valve position maximum primary frequency modulation amount confirmed according to (one) step determines and is ensureing the sides DEH primary frequency modulation just
The primary frequency modulation spare capacity limits value often acted on
To enable the primary frequency function during unit operation to be operating normally, it is necessary to assure unit has enough primary
Frequency modulation acts allowance；Since fired power generating unit primary frequency function is realized in the sides DEH and the sides CCS respectively, by by the sides unit CCS work(
The PID output upper limits of rate control automated manner and the output upper limit of manual operator are limited, to ensure the primary frequency modulation of the sides DEH
Function normally acts on；Output the upper limit limits value be：
fFvmax1=100-Fvmax(Pt)
Wherein, fFvmax1The output for the sides CCS the power control PID and manual operator that the sides-guarantee DEH primary frequency modulation normally acts on
The upper limit；
Fvmax(Pt)-corresponding with main vapour pressure unit comprehensive valve position maximum primary frequency modulation amount；
(3) correction value of the sides CCS primary frequency modulation spare capacity is determined
(2) step determines the output upper limit when primary frequency modulation is operating normally, it is possible to influence the primary frequency modulation of the sides CCS
Function, in order to ensure that the sides CCS primary frequency modulation can be acted on normally, it must be determined that the correction value of the sides CCS primary frequency modulation spare capacity：
Wherein, fFvCCS- it is the sides CCS primary frequency modulation spare capacity correction value；
FreqMWThe corresponding load primary frequency modulation amount of-current frequency；
PreqMWmaxThe peak load primary frequency modulation amount of-unit；
(4) (two) step is combined to can determine the primary frequency modulation spare capacity computational methods of unit with (three) step, such as
Under：
fFvmax=fFvCCS+fFmax1=fFvCCS+100-Fvmax(Pt)
Wherein, fFvmax- it is unit primary frequency modulation spare capacity；
Set finally determining unit primary frequency modulation spare capacity to the PID of the sides unit CCS power control automated manner
With the output upper limit of manual mode manual operator, you can ensure that primary frequency function of the unit under any operating mode can normally be made
With.
Fired power generating unit primary frequency modulation spare capacity control strategy optimization method, the platform of implementation are the main control of fired power generating unit
System, embodiment include the following steps：
(1) logical groups of primary frequency modulation spare capacity control strategy optimization method are carried out in the master control system of unit
State realizes following control function：
(1) piecewise function method is used, the comprehensive valve position maximum primary frequency modulation amount of each main vapour pressure section is obtained；
(2) the primary frequency modulation spare capacity circumscription logic for ensureing that the sides DEH primary frequency modulation normally acts on is determined；
(3) control logic of the sides CCS primary frequency modulation spare capacity correction amount is determined；
(4) the output upper limit of the PID of the sides unit CCS power control automated manner and manual mode manual operator realizes logic.
Claims (1)
1. a kind of fired power generating unit primary frequency modulation spare capacity control strategy optimization method, which is characterized in that include the following steps：
(1) unit main vapour pressure is divided into k sections, confirms the comprehensive valve position maximum primary frequency modulation amount of each pressure stage
According to unit main vapour pressure Fixed slip fixed curve, main vapour pressure is divided into k sections, determines unit operation in each pressure stage respectively
When comprehensive valve position maximum primary frequency modulation amount；
Wherein, Fvmax(Pt)-corresponding with main vapour pressure unit comprehensive valve position maximum primary frequency modulation amount；
Fvmax1- for determine after first main vapour pressure section comprehensive valve position maximum primary frequency modulation amount；
Fvmaxi- for determine after i-th of main vapour pressure section comprehensive valve position maximum primary frequency modulation amount；
Fvmaxk- for determine after k-th of main vapour pressure section comprehensive valve position maximum primary frequency modulation amount；
Pt- it is unit main vapour pressure；
Ptmin- be unit normal operation when minimum main vapour pressure；
Ptmax1- be first main vapour pressure section upper pressure limit；
Ptmini- be i-th of main vapour pressure section low pressure limit；
Ptmaxi- be i-th of main vapour pressure section upper pressure limit；
Ptmink- be k-th of main vapour pressure section low pressure limit；
Ptmax- be unit normal operation when maximum main vapour pressure；
(2) the comprehensive valve position maximum primary frequency modulation amount confirmed according to (one) step determines and ensures that the sides DEH primary frequency modulation is normally made
Primary frequency modulation spare capacity limits value
To enable the primary frequency function during unit operation to be operating normally, it is necessary to assure unit has enough primary frequency modulations
Act allowance；Since fired power generating unit primary frequency function is realized in the sides DEH and the sides CCS respectively, by by the power control of the sides unit CCS
The PID output upper limits of automated manner processed and the output upper limit of manual operator are limited, to ensure the primary frequency function of the sides DEH
Normal effect；Output the upper limit limits value be：
fFvmax1=100-Fvmax(Pt)
Wherein, fFvmax1- ensure in the output of the sides CCS power control PID and manual operator that the sides DEH primary frequency modulation normally acts on
Limit；
Fvmax(Pt)-corresponding with main vapour pressure unit comprehensive valve position maximum primary frequency modulation amount；
(3) correction value of the sides CCS primary frequency modulation spare capacity is determined
(2) step determines the output upper limit when primary frequency modulation is operating normally, it is possible to the primary frequency function of the sides CCS is influenced,
In order to ensure that the sides CCS primary frequency modulation can be acted on normally, it must be determined that the correction value of the sides CCS primary frequency modulation spare capacity：
Wherein, fFvCCS- it is the sides CCS primary frequency modulation spare capacity correction value；
FreqMWThe corresponding load primary frequency modulation amount of-current frequency；
FreqMWmaxThe peak load primary frequency modulation amount of-unit；
(4) (two) step is combined to can determine the primary frequency modulation spare capacity computational methods of unit with (three) step, it is as follows：
fFvmax=fFvCCS+fFvmax1=fFvCCS+100-Fvmax(Pt)
Wherein, fFvmax- it is unit primary frequency modulation spare capacity；
Set finally determining unit primary frequency modulation spare capacity to the PID and hand of the sides unit CCS power control automated manner
The output upper limit of flowing mode manual operator, you can ensure that primary frequency function of the unit under any operating mode can be acted on normally.
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| CN109962484B (en) * | 2019-04-08 | 2023-05-26 | 云南电网有限责任公司 | Primary frequency modulation standby optimization method of asynchronous networking transmitting end system considering frequency deviation |
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| JP2009022137A (en) * | 2007-07-13 | 2009-01-29 | Tohoku Electric Power Co Inc | Automatic generating method of output distribution plan for thermal power generator |
| JP2009261115A (en) * | 2008-04-16 | 2009-11-05 | Mitsubishi Electric Corp | Generator blocking device |
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| CN102646980A (en) * | 2012-04-12 | 2012-08-22 | 山东电力研究院 | Novel primary frequency-modulation compensation control method of unit thermal generator set |
| CN103378601A (en) * | 2012-04-20 | 2013-10-30 | 华北电力科学研究院有限责任公司 | Primary frequency modulation method and device based on bang-bang control |
| CN105226700A (en) * | 2014-06-10 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | Based on primary frequency modulation control method and the device of valve flow characteristic dynamic conditioning |
-
2016
- 2016-07-08 CN CN201610535099.4A patent/CN106208852B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009022137A (en) * | 2007-07-13 | 2009-01-29 | Tohoku Electric Power Co Inc | Automatic generating method of output distribution plan for thermal power generator |
| JP2009261115A (en) * | 2008-04-16 | 2009-11-05 | Mitsubishi Electric Corp | Generator blocking device |
| CN102646980A (en) * | 2012-04-12 | 2012-08-22 | 山东电力研究院 | Novel primary frequency-modulation compensation control method of unit thermal generator set |
| CN103378601A (en) * | 2012-04-20 | 2013-10-30 | 华北电力科学研究院有限责任公司 | Primary frequency modulation method and device based on bang-bang control |
| CN102629762A (en) * | 2012-04-24 | 2012-08-08 | 湖北省电力公司电力试验研究院 | Floating frequency difference regulation and variable rate load instruction modification-based primary frequency regulation method |
| CN105226700A (en) * | 2014-06-10 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | Based on primary frequency modulation control method and the device of valve flow characteristic dynamic conditioning |
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