CN108512232A - A kind of computational methods of Thermal generation unit speed diversity factor - Google Patents

A kind of computational methods of Thermal generation unit speed diversity factor Download PDF

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Publication number
CN108512232A
CN108512232A CN201810325197.4A CN201810325197A CN108512232A CN 108512232 A CN108512232 A CN 108512232A CN 201810325197 A CN201810325197 A CN 201810325197A CN 108512232 A CN108512232 A CN 108512232A
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China
Prior art keywords
stage pressure
perunit
speed
diversity factor
disturbance
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CN201810325197.4A
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CN108512232B (en
Inventor
张长志
李浩然
倪伟晨
王建军
周连升
甘智勇
张应田
郑卫红
曹晓男
杜岩
郭凌旭
鄂志君
陈天恒
杨晓静
段建勋
冯长强
张志良
沙威
欧阳佳慧
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Electric Power Research Institute of State Grid Tianjin Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Electric Power Research Institute of State Grid Tianjin Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Control Of Turbines (AREA)

Abstract

The present invention relates to a kind of computational methods of Thermal generation unit speed diversity factor, including steps are as follows：The first step, generating set operation conditions confirm that 90% rated load of band is at least stablized 24 hours after major overhaul, and generating set is exited AGC control modes, and input is coordinated, valve control or power control, second step, and data obtain, rated speed n before acquisition disturbance0, first stage pressure p0And load N0Measuring point data, simulation tach signal n1, the record first stage pressure p after disturbance is stablized1, load N1；Third walks, and handles data, by calculating rotating speed deviation, rotating speed change of error perunit, first stage pressure perunit benchmark, first stage pressure changing value, show that first stage pressure changes perunit, finally obtains the speed diversity factor calculated with first stage pressure.The present invention reacts the variation of load by first stage pressure, reaches fast and accurately purpose, while saving cumbersome Conversion of measurement unit and parameter conversion link using perunit value calculating, scientific method is provided for the calculating of speed diversity factor.

Description

A kind of computational methods of Thermal generation unit speed diversity factor
Technical field
The invention belongs to technical field of power generation, more particularly, to a kind of calculating side of Thermal generation unit speed diversity factor Method.
Background technology
With the development of economy, industry manufacture and requirement of the resident living to power quality are higher and higher.Mains frequency is made It is deep to be paid attention to by power department to weigh one of the major criterion of power quality.The primary frequency function of Thermal generation unit is made For the direct approach of power grid frequency modulation function, the quality that function is realized directly affects the quality of mains frequency.Therefore reinforce to combustion The primary frequency modulation management of coal power generation unit, to safeguarding that power grid security is of great significance.And it weighs Thermal generation unit and once adjusts One of the important indicator of frequency function is exactly speed diversity factor, and traditional speed diversity factor calculates and uses load variations amount and frequency difference The ratio between variable quantity obtains, due to power transducer reaction, stand between the delay issues such as communication so that calculated speed diversity factor is not It can actual response actual load pace of change and amplitude.Therefore according to Thermal generation unit load responding the characteristics of establishes a kind of The computational methods of Thermal generation unit speed diversity factor, the authenticity and accuracy for improving speed diversity factor result of calculation very must It wants.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of meters of Thermal generation unit speed diversity factor Calculation method.
The present invention solves its technical problem and following technical scheme is taken to realize：
A kind of computational methods of Thermal generation unit speed diversity factor, including steps are as follows：
The first step, generating set operation conditions confirm
(1) 90% rated load of band is at least stablized 24 hours after generating set overhaul；
(2) determine that primary frequency function design meets relevant regulatory requirements；
(3) generating set is exited into AGC control modes；
(4) coordinated control system or DEH power control systems are normally put into, and unit allocation is stablized；
(5) determine that basic control system is normally put into；
(6) it is without exception to determine that the major parameter of generating set operation is stablized；
(7) confirm that rotary speed of generator group and mains frequency signal checking are qualified, and have relevant verification certificate；
(8) confirm that the storage of generating set major parameter data is normal, the sampling period is no less than 1s；
Second step, data obtain
(1) after confirming that the main measuring point of generating set is shown normally, rated speed n before acquisition disturbance0, first stage pressure p0And Load N0Measuring point data；
(2) simulation tach signal n1, the record first stage pressure p after disturbance is stablized1, load N1；
Third walks, and handles data
(1) rotating speed deviation is calculated：Δ n=n0-n1……(1)
(2) rotating speed change of error perunit is calculated：
(3) first stage pressure perunit benchmark is calculated：
(4) first stage pressure changing value is calculated：Δ P=| P1-P0|……(4)
(5) according to formula (3), the result of calculation of (4), show that first stage pressure changes perunit：
(6) according to the result of calculation of formula (5), the speed diversity factor calculated with first stage pressure is obtained：
Wherein, each meaning of parameters is：n0--- rated speed before disturbance, p0--- first stage pressure before disturbance, N0--- it disturbs Dynamic preload, n1--- simulation rotating speed, p1--- first stage pressure after disturbance, N1--- disturbance afterload, Δ n --- rotating speed is inclined Difference, Δ n' --- rotating speed change of error perunit, P1e--- first stage pressure perunit benchmark being calculated, Δ P --- first stage pressure becomes Change value, Δ P' --- first stage pressure change perunit, δ --- speed diversity factor.
Moreover, it includes Stream temperature, main vapour pressure, steam water-level that major parameter, which is stablized without exception, in (6) step of the first step Centrum's temperature, combustion chamber draft are stable, alarm free or exception.
Moreover, major parameter data include rotating speed, power, main vapour pressure, governing stage pressure in (8) step of the first step Power, pitch aperture and instruction.
The advantages and positive effects of the present invention are：
The present invention proposes a kind of computational methods of Thermal generation unit speed diversity factor, is reacted by first stage pressure negative The variation of lotus reaches fast and accurately purpose, while saving cumbersome Conversion of measurement unit and parameter conversion ring using perunit value calculating Section provides scientific algorithm method to improve speed diversity factor calculating speed and authenticity.
Description of the drawings
Fig. 1 is the logic step schematic diagram of the method for the present invention.
Specific implementation mode
The embodiment of the present invention is further described below in conjunction with attached drawing：It is emphasized that implementation of the present invention Example is illustrative, every without being restrictive, therefore the present invention is not limited to the embodiment described in specific implementation mode The other embodiment obtained according to the technique and scheme of the present invention by those skilled in the art also belongs to the model that the present invention protects It encloses.
A kind of computational methods of Thermal generation unit speed diversity factor, as shown in Figure 1,
The first step, generating set operation conditions confirm
(1) 90% rated load of band is at least stablized 24 hours after generating set overhaul；
(2) determine that primary frequency function design meets relevant regulatory requirements；
(3) generating set is exited into AGC control modes；
(4) coordinated control system or DEH power control systems are normally put into, and unit allocation is stablized；
(5) determine that basic control system is normally put into；
(6) it is without exception to determine that the major parameter of generating set operation is stablized；
Wherein, major parameter includes that Stream temperature, main vapour pressure, steam water-level centrum's temperature, combustion chamber draft are stable, nothing Alarm is abnormal；
(7) confirm that rotary speed of generator group and mains frequency signal checking are qualified, and have relevant verification certificate；
(8) confirm that the storage of generating set major parameter data is normal, the sampling period is no less than 1s.
Wherein, major parameter data include rotating speed, power, main vapour pressure, first stage pressure, pitch aperture and instruction.
Second step, data obtain
(1) after confirming that the main measuring point of generating set is shown normally, rated speed n before acquisition disturbance0, first stage pressure p0And Load N0Measuring point data；
(2) simulation tach signal n1, the record first stage pressure p after disturbance is stablized1, load N1；
Third walks, and handles data
(1) rotating speed deviation is calculated：Δ n=n0-n1……(1)
(2) rotating speed change of error perunit is calculated：
(3) first stage pressure perunit benchmark is calculated：
(4) first stage pressure changing value is calculated：Δ P=| P1-P0|……(4)
(5) according to formula (3), the result of calculation of (4), show that first stage pressure changes perunit：
(6) according to the result of calculation of formula (5), the speed diversity factor calculated with first stage pressure is obtained：
Wherein, each meaning of parameters is：n0--- rated speed before disturbance, p0--- first stage pressure before disturbance, N0--- it disturbs Dynamic preload, n1--- simulation rotating speed, p1--- first stage pressure after disturbance, N1--- disturbance afterload, Δ n --- rotating speed is inclined Difference, Δ n' --- rotating speed change of error perunit, P1e--- first stage pressure perunit benchmark being calculated, Δ P --- first stage pressure becomes Change value, Δ P' --- first stage pressure change perunit, δ --- speed diversity factor.

Claims (3)

1. a kind of computational methods of Thermal generation unit speed diversity factor, it is characterised in that including steps are as follows：
The first step, generating set operation conditions confirm
(1) 90% rated load of band is at least stablized 24 hours after generating set overhaul；
(2) determine that primary frequency function design meets relevant regulatory requirements；
(3) generating set is exited into AGC control modes；
(4) coordinated control system or DEH power control systems are normally put into, and unit allocation is stablized；
(5) determine that basic control system is normally put into；
(6) it is without exception to determine that the major parameter of generating set operation is stablized；
(7) confirm that rotary speed of generator group and mains frequency signal checking are qualified, and have relevant verification certificate；
(8) confirm that the storage of generating set major parameter data is normal, the sampling period is no less than 1s；
Second step, data obtain
(1) after confirming that the main measuring point of generating set is shown normally, rated speed n before acquisition disturbance0, first stage pressure p0And load N0Measuring point data；
(2) simulation tach signal n1, the record first stage pressure p after disturbance is stablized1, load N1；
Third walks, and handles data
(1) rotating speed deviation is calculated：Δ n=n0-n1……(1)
(2) rotating speed change of error perunit is calculated：
(3) first stage pressure perunit benchmark is calculated：
(4) first stage pressure changing value is calculated：Δ P=| P1-P0|……(4)
(5) according to formula (3), the result of calculation of (4), show that first stage pressure changes perunit：
(6) according to the result of calculation of formula (5), the speed diversity factor calculated with first stage pressure is obtained：
Wherein, each meaning of parameters is：n0--- rated speed before disturbance, p0--- first stage pressure before disturbance, N0--- before disturbance Load, n1--- simulation rotating speed, p1--- first stage pressure after disturbance, N1--- disturbance afterload, Δ n --- rotating speed deviation, Δ N' --- rotating speed change of error perunit, P1e--- calculating first stage pressure perunit benchmark, Δ P --- first stage pressure changing value, Δ P' --- first stage pressure changes perunit, δ --- speed diversity factor.
2. the computational methods of Thermal generation unit speed diversity factor according to claim 1, it is characterised in that：Described first It includes Stream temperature, main vapour pressure, steam water-level centrum's temperature, combustion chamber draft fortune that major parameter, which is stablized without exception, in (6) step of step Row is stablized, alarm free or exception.
3. the computational methods of Thermal generation unit speed diversity factor according to claim 1, it is characterised in that：Described first Major parameter data include rotating speed, power, main vapour pressure, first stage pressure, pitch aperture and instruction in (8) step of step.
CN201810325197.4A 2018-04-12 2018-04-12 Method for calculating speed unequal rate of coal-fired generator set Active CN108512232B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110768288A (en) * 2019-09-27 2020-02-07 国网天津市电力公司电力科学研究院 Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set
CN111446723A (en) * 2019-09-29 2020-07-24 国网天津市电力公司电力科学研究院 Method for calculating rotating speed unequal rate of coal-fired generator set
CN111654058A (en) * 2020-05-27 2020-09-11 国网天津市电力公司电力科学研究院 Method for calculating rotating speed unequal rate of gas generator set

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CN103147804A (en) * 2013-02-20 2013-06-12 哈尔滨汽轮机厂有限责任公司 One-step frequency modulation control method for steam turbine
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CN106410857A (en) * 2016-04-08 2017-02-15 国网天津市电力公司 Unit generating set primary frequency modulation function realization method
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CN103513640A (en) * 2013-10-11 2014-01-15 国家电网公司 Integral optimization method and system for automatic power generation system of coal-fired unit
EP3293364A1 (en) * 2015-08-14 2018-03-14 Mitsubishi Heavy Industries, Ltd. Control device for power generation system, power generation system, and power generation method
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110768288A (en) * 2019-09-27 2020-02-07 国网天津市电力公司电力科学研究院 Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set
CN111446723A (en) * 2019-09-29 2020-07-24 国网天津市电力公司电力科学研究院 Method for calculating rotating speed unequal rate of coal-fired generator set
CN111654058A (en) * 2020-05-27 2020-09-11 国网天津市电力公司电力科学研究院 Method for calculating rotating speed unequal rate of gas generator set
CN111654058B (en) * 2020-05-27 2023-06-30 国网天津市电力公司电力科学研究院 Calculation method for unequal rotation speed of gas generator set

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Address after: No. 8, Haitai Huake 4th Road, Huayuan Industrial Zone, High tech Zone, Binhai New Area, Tianjin, 300384

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