CN110318826A - Fired power generating unit bypath system removal of load control strategy under isolated network mode - Google Patents
Fired power generating unit bypath system removal of load control strategy under isolated network mode Download PDFInfo
- Publication number
- CN110318826A CN110318826A CN201910590343.0A CN201910590343A CN110318826A CN 110318826 A CN110318826 A CN 110318826A CN 201910590343 A CN201910590343 A CN 201910590343A CN 110318826 A CN110318826 A CN 110318826A
- Authority
- CN
- China
- Prior art keywords
- load
- instruction
- steam
- override
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The present invention provides the fired power generating unit bypath system removal of load control strategies under a kind of isolated network mode, comprising: control mode conversion module, override feedforward computing module, steam parameter control module；Wherein, control mode conversion module for real-time monitoring removal of load signal determining full load rejection operating condition and gets rid of partial load condition, and generates conversion instruction, including opens instruction, hand automatic switchover instruction and steam parameter setting instruction fastly；Override feedforward computing module, for according to full load rejection operating condition and the fast opening amount of override and adjusting feedforward amount of getting rid of each regulating loop of partial load condition calculating bypass；Steam parameter control module, for being controlled according to the conversion instruction of acquisition, the fast opening amount of override and adjusting feedforward amount.The present invention solves the problems, such as removal of load control quick response of the fired power generating unit bypath system under isolated network mode, and improves steam parameter Control platform.
Description
Technical field
The present invention relates to fired power generating unit control technology fields, and in particular, to by the fired power generating unit under a kind of isolated network mode
Road system removal of load control strategy.
Background technique
During fired power generating unit is incorporated into the power networks, if steam turbine, generator or grid side break down when causing removal of load, in order to
It can restore rapidly to send electricity after debugging, avoid causing economic loss because of unit outage, quickly be reduced out using boiler
Steam parameter stable operation is quickly opened and maintained to power, bypath system, so as to grid-connected on-load rapid after Failure elimination.It is this to get rid of
Duty control method is that unit fast cut back protects (Fast cut back, FCB), and contain three kinds of operating conditions: steam turbine is jumped
Lock, steam turbine house load operation and steam turbine idle running.
In isolated network, fired power generating unit does not control load and is in frequency control system, the frequency when removal of load occurs for downstream
Rise, system can quickly subtract pitch instruction according to the rising of frequency reduces unit output, until generate electricity re-establish with electricity consumption it is flat
Weighing apparatus, frequency retrieval to rated value.When significantly frequency modulation demand occurs, stabilized control system will be issued according to different operating conditions to unit
Quick-release load command, the fast load removal of load shedding 10% to 100% etc., referred to as frequency modulation；When frequency is excessively high, in the fire of net operation
Motor group executes overspeed protection control (Over speed protection control, OPC) quickly by different definite values respectively
It closes throttle also to reset respectively according to different definite values when frequency is gradually restored, with fast and stable frequency.Two kinds of works
Condition requires bypath system and quickly opens and steam parameter is maintained to stablize.
Removal of load can be divided into full load rejection and get rid of two kinds of sub-load, and boiler side is on demand fuel quantity, air quantity, water supply
With certain speed adjust to reasonable level, steam turbine side needs to complete steam channel and is switched fast and guarantees that main, reheating is steamed amount
Otherwise the fast and stable of vapour parameter easily leads to unit allocation sustained oscillation and even trips.Especially isolated power grid unit may connect
Continuous that the fast load removal of frequency modulation repeatedly occurs, if a preceding quick-release load is not also stable, a rear quick-release load will join without stable state
Number can for reference have an adverse effect to the reliability and stability of Bypass Control.
Therefore, how to solve bypath system to the quick response of removal of load, guarantee safety of unit during removal of load,
Stable operation simultaneously overcomes adverse effect, is a technical problem to be solved urgently.
Summary of the invention
Technical problem to be solved by the invention is to provide the fired power generating unit bypath system removal of loads under a kind of isolated network mode
Control strategy, by solve unit in isolated network in a manner of under removal of load control rapid response to customer's need, guarantee unit occur steam turbine trip,
Generator off-the-line, OPC movement, safe and stable operation in frequency modulation quick-release load process, and steam parameter Control platform can be mentioned.
To reach above-mentioned technical purpose, the present invention provides the fired power generating unit bypath system removal of loads under a kind of isolated network mode
Control strategy, applied to the fired power generating unit Bypass Control System in isolated network, comprising: control mode conversion module, override feedforward meter
Calculate module, steam parameter control module, wherein control mode conversion module: for sentencing according to the removal of load signal of real-time monitoring
Determine full load rejection operating condition and to get rid of partial load condition and generate conversion instruction, the conversion instruction includes that open instruction, hand fastly automatic
Switching command and steam parameter setting instruction；
Override feedforward computing module: for calculating the fast opening amount of override and adjusting feedforward amount that bypass each regulating loop, specifically
Ground according to full load rejection operating condition and gets rid of partial load condition and calculates and select the fast opening amount of override and adjusting of high lateral pressure regulating loop
Feedforward amount calculates the fast opening amount of override in high other temperature reducing regulation circuit according to steam flow instruction by height and adjusts feedforward amount, according to
High other steam flow instruction calculates the fast opening amount of override of low lateral pressure regulating loop and adjusts feedforward amount, according to low other steam flow
Instruction calculates the fast opening amount of override in low other temperature reducing regulation circuit and adjusts feedforward amount；
Steam parameter control module: for being carried out according to the conversion instruction of acquisition, the fast opening amount of override and adjusting feedforward amount
Control.
Preferably, the decision condition of the full load rejection operating condition are as follows: steam turbine trip, generator off-the-line, any in OPC movement
Movement is set up, and one of movement occurs in this three movements, two of them movement occurs sets up and occurs three movements, institute
The decision condition for stating full load rejection operating condition is set up, the decision condition for getting rid of partial load condition are as follows: the fast load removal of frequency modulation；
Full load rejection is generated when full load rejection operating condition and opens request fastly, is generated when getting rid of partial load condition and is got rid of sub-load
Open request fastly, when full load rejection open request fastly or get rid of sub-load open fastly request occur and bypass without it is strong close condition when, generate other
Lu Kuaikai instruction；
The hand automatically switches instruction and include after occurring to open instruction fastly to be immediately performed starts work and by all regulating loops fastly
Switch to manual mode, and the switchback automatic mode after work is started in execution fastly；
The steam parameter setting instruction includes desired temperature after main, reheated steam pressure set points and high and low side valve
Switching；It, will be warm after desired temperature after the main steam pressure setting value, high side valve and low side valve after execution starts work fastly
Degree setting value is switched to the actual value started before making fastly, and the reheated steam pressure set points are switched in full load rejection
Unit red switch pressure is switched to the actual value started before making fastly when getting rid of sub-load.
Preferably, the fast opening amount of override of the high lateral pressure regulating loop passes through height according to steam flow demand by height
Lateral pressure adjusts valve characteristic conversion；Wherein, when full load rejection operating condition, using the main steam flow before removal of load as high other steaming
Steam flow amount demand refers to steam flow increment by height and the other steam flow of height before removal of load when getting rid of partial load condition
The sum of order is as high other steam flow demand；The feedforward amount of the high lateral pressure regulating loop is high other steam flow increment；
The main steam flow is the sum of steam turbine high pressure cylinder throttle flow and high other steam flow, and the high other steam flow passes through
High lateral pressure control valve opening feedback is obtained with main steam temperature, calculation of pressure, and the high other steam flow instruction passes through high other
Pressure-regulating valve opening degree instruction and main steam temperature, calculation of pressure obtain, and the high other steam flow increment is to get rid of sub-load
The difference power of front and back unit and the product of design steam power ratio.
Preferably, the feedforward amount in the high side temperature reducing regulation circuit is high other attemperation water flow demand, and the high side subtracts
The fast opening amount of the override of warm regulating loop passes through high other temperature reducing regulation valve characteristic according to the feedforward amount in the high other temperature reducing regulation circuit
Curve conversion；Wherein, the high other attemperation water flow demand is that high other steam flow instruction is matched with high other desuperheating water design
The product of coefficient.
Preferably, the feedforward amount of the low lateral pressure regulating loop is the high other steam flow instruction and other desuperheat water flow
Measure the sum of demand, the fast opening amount of override of the low lateral pressure regulating loop is according to the feedforward amount of the low lateral pressure regulating loop
Valve characteristic conversion is adjusted by low lateral pressure.
Preferably, the feedforward amount in the low other temperature reducing regulation circuit is low other attemperation water flow demand, and the low side subtracts
The fast opening amount of the override of warm regulating loop passes through low other temperature reducing regulation valve characteristic according to the feedforward amount in the low other temperature reducing regulation circuit
Curve conversion；Wherein, the low other attemperation water flow demand is that low other steam flow instruction is matched with low other desuperheating water design
The product of coefficient, the low other steam flow instruction pass through the instruction of low lateral pressure control valve opening and reheat steam temperature, pressure
It calculates and obtains.
It preferably, further include the series connected valve characteristic curve module between the adjuster and manual operator in all regulating loops
Carry out linear matched.
Compared with prior art, the fired power generating unit bypath system removal of load control under a kind of isolated network mode of the present invention
Strategy achieving the following effects:
1) using the fired power generating unit of technical solution of the present invention in removal of load, the control mode of bypass can be rationally determined,
And the fast opening amount of override of each regulating loop is accurately matched by working medium EQUILIBRIUM CALCULATION FOR PROCESS and adjusts feedforward amount, have good anti-interference
Characteristic can inhibit various disturbing factors during removal of load, improve steam parameter Control platform；
2) steam parameter is selected most for different operating conditions in removal of load using the fired power generating unit of technical solution of the present invention
Excellent setting value is conducive to the safe and stable operation of unit so that steam parameter control be effectively ensured in reasonable level；
3) technical solutions according to the invention, structure type is simple, control parameter is intuitive, practical, have it is very strong can
Operability.
Detailed description of the invention
Attached drawing is to be used for a further understanding of the present invention, and constitute part of specification, with following specific implementation
Mode is used to explain the present invention together, is not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the fired power generating unit bypath system removal of load control strategy under isolated network mode of the present invention；
Fig. 2 is the logic diagram of control mode conversion module of the present invention；
Fig. 3 is the logic diagram of override of the present invention feedforward computing module.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing, is not intended to restrict the invention
Protection scope.
Fired power generating unit bypath system removal of load control strategy under a kind of isolated network mode, applied to the fired power generating unit in isolated network
Bypass Control System, comprising: control mode conversion module, override feedforward computing module, steam parameter control module, wherein control
Mode conversion module processed: for according to the removal of load signal determining full load rejection operating condition of real-time monitoring and getting rid of partial load condition simultaneously
Conversion instruction is generated, the conversion instruction includes opening instruction, hand automatic switchover instruction and steam parameter setting instruction fastly；
Override feedforward computing module: for calculating the fast opening amount of override and adjusting feedforward amount that bypass each regulating loop, specifically
Ground according to full load rejection operating condition and gets rid of partial load condition and calculates and select the fast opening amount of override and adjusting of high lateral pressure regulating loop
Feedforward amount calculates the fast opening amount of override in high other temperature reducing regulation circuit according to steam flow instruction by height and adjusts feedforward amount, according to
High other steam flow instruction calculates the fast opening amount of override of low lateral pressure regulating loop and adjusts feedforward amount, according to low other steam flow
Instruction calculates the fast opening amount of override in low other temperature reducing regulation circuit and adjusts feedforward amount；
Steam parameter control module: for being carried out according to the conversion instruction of acquisition, the fast opening amount of override and adjusting feedforward amount
Control.
As shown in Figure 1, the present invention provides the fired power generating unit bypath system removal of load control strategy under a kind of isolated network mode,
Include:
Step 100 opens instruction, hand automatic switchover instruction and steam according to the generation of removal of load signal determining removal of load operating condition fastly
Parameter setting instruction.
This step is as shown in Fig. 2, be control mode conversion module, for real-time monitoring removal of load signal, judgement is got rid of complete negative
Lotus operating condition and partial load condition is got rid of, and generates dependent instruction.When monitor steam turbine trip, generator off-the-line or OPC movement then
It is determined as unit full load rejection, request was opened fastly with 2 seconds width-pulse triggering full load rejections；When monitoring that the fast load removal of frequency modulation then sentences
It is set to unit and gets rid of sub-load, sub-load was got rid of with width-pulse triggering in 2 seconds and opens request fastly.Condition locking is closed by force in none-disk terminal
When, request triggering bypass is opened fastly for two kinds open instruction fastly.
After acquisition bypass opens instruction fastly, temperature regulating circuit is held immediately after high and low lateral pressure regulating loop and high and low side valve
Row starts work fastly, and is cut to manual mode, is cut to automatic mode after 1 second.
In removal of load, steam parameter amplitude of variation is big before and after instruction is opened in execution bypass fastly, such as cannot quickly control and close
The level of reason will be unfavorable for stable operation of unit, it is therefore desirable to carry out matching setting to steam pressure, desired temperature, it is ensured that
Steam parameter control adapts to two kinds of removal of load operating conditions respectively.
High other steam parameter setting value switching, bypasses high lateral pressure regulating loop when opening fastly and exits pressure-biased mode and set
Determine rate limit, the main steam pressure actual value before bypass is opened 3 seconds fastly opens end as main steam pressure setting value, bypass fastly
Restore setting rate limit afterwards；Vapo(u)rous temperature and the summation of default degree of superheat allowance after high side valve, before opening 3 seconds fastly with bypass
Temperature actual value Gao Xuanhou after high side valve, as desired temperature after high side valve.
Low other steam parameter setting value switching, bypasses low lateral pressure regulating loop when opening fastly and exits setting rate limit,
When getting rid of sub-load and opening request fastly, it is real that reheated steam pressure set points are assigned a value of to the reheated steam pressure before bypass is opened 3 seconds fastly
Otherwise actual value is assigned a value of reheated steam red switch pressure, be 1MPa in example, and bypass restores setting rate limit after opening fastly；
The reheated steam pressure low limit function needs generated according to unit on-load state by speed regulation stage pressure are cut off during removal of load,
Otherwise reheated steam pressure set points are higher will lead to main, reheated steam parameter mismatch；It is closed by set grid-connection operation, height
And removal of load terminates to reactivate reheated steam pressure low limit function after a certain period of time, the removal of load end time is 300 in example
Second；Desired temperature after low side valve is assigned a value of temperature actual value after the low side valve before bypass is opened 3 seconds fastly when opening fastly by bypass.
Step 101, the fast opening amount of override and adjusting feedforward amount that each regulating loop is bypassed according to removal of load condition calculating.
This step is as shown in figure 3, for override feedforward computing module, for calculating the fast opening amount of override for bypassing each regulating loop
High lateral pressure regulating loop is specifically selected with partial load condition calculating is got rid of according to full load rejection operating condition with adjusting feedforward amount
The fast opening amount of override and adjust feedforward amount, the fast opening amount of override in high other temperature reducing regulation circuit is calculated according to steam flow instruction by height
With adjusting feedforward amount, feedovered according to the fast opening amount of override of the low lateral pressure regulating loop of steam flow instruction calculating and adjusting by height
Amount calculates the fast opening amount of override in low other temperature reducing regulation circuit according to low other steam flow instruction and adjusts feedforward amount.
The fast opening amount of override and adjusting feedforward amount of high lateral pressure regulating loop, according to full load rejection operating condition and get rid of sub-load
Operating condition calculate to main steam flow and removal of load amount and be selected, in which:
The fast opening amount of override of high lateral pressure regulating loop passes through high lateral pressure regulating valve according to steam flow demand by height
Characteristic curve conversion.When full load rejection, the other steam flow demand of height after bypass is opened fastly is the main steam flow bypassed before opening fastly.
Main steam flow is the sum of steam turbine high pressure cylinder throttle flow and high other steam flow, and high other steam flow is opened according to high lateral pressure regulating valve
Degree feedback and main steam temperature, pressure are calculated by flow formula.When getting rid of sub-load, the other steam flow of the height after opening fastly is bypassed
Demand is to bypass the sum of the height side steam flow instruction before opening fastly and the side of height caused by removal of load steam flow increment, and high side is steamed
Vapour flow instruction is calculated according to the instruction of high lateral pressure control valve opening and main steam temperature, pressure by flow formula, and high side is steamed
Vapour flow increment is calculated according to the difference power for getting rid of sub-load front and back unit by design steam power ratio.In example, bypass is fast
Steam flow and steam flow instruction before opening are for by the actual value before bypassing 2 seconds that open order register fastly, high other steam stream
Measuring increment is by the difference and design steam power ratio of the power of the assembling unit and its real value before 2 seconds of the fast load removal deposit of frequency modulation
Product.The feedforward amount of high lateral pressure regulating loop is high other steam flow increment.In example, this feedforward amount bypass open fastly when into
Enter adjuster, it is effective when regulating loop is automatic, it is cut off at the end of frequency modulation fast load removal using the following function of adjuster, it can
Ensure to be effectively matched changed power during unit continues the fast load removal of frequency modulation.
The feedforward amount in high other temperature reducing regulation circuit is high other attemperation water flow demand, i.e., high other steam flow instruction and height
The fast opening amount of override of the product of other desuperheating water design stoichiometric factor, high other temperature reducing regulation circuit subtracts according to its feedforward amount by the way that height is other
Temperature adjusts valve characteristic conversion.
The feedforward amount of low lateral pressure regulating loop is low other steam flow demand, i.e., high other attemperation water flow demand with
The sum of high other steam flow instruction, the fast opening amount of override of low lateral pressure regulating loop is adjusted according to its feedforward amount by low lateral pressure
Valve characteristic conversion.
The feedforward amount in low other temperature reducing regulation circuit is low other attemperation water flow demand, i.e., low other steam flow instruction and low
The fast opening amount of override of the product of other desuperheating water design stoichiometric factor, low other temperature reducing regulation circuit is subtracted according to its feedforward amount by low side
Temperature adjusts valve characteristic conversion.Wherein, low other steam flow instruction is steamed according to the instruction of low lateral pressure control valve opening and reheating
Stripping temperature, pressure are calculated by flow formula.
Step 102, basis open instruction fastly, hand automatically switches instruction, steam parameter sets instruction, the fast opening amount of override and adjusting
Feedforward amount is controlled.
This step is steam parameter control module, conversion instruction and override for being obtained according to control mode conversion module
The fast opening amount of override, the conversion of adjusting feedforward amount executive mode and the adjusting control that the computing module that feedovers obtains.Wherein, in all adjustings
Series connected valve characteristic curve module carries out linear matched between adjuster and manual operator in circuit, it is ensured that adjusts good adjusting
Quality.
Compared with prior art, the fired power generating unit bypath system removal of load control under a kind of isolated network mode of the present invention
Strategy achieving the following effects:
1) using the fired power generating unit of technical solution of the present invention in removal of load, the control mode of bypass can be rationally determined,
And the fast opening amount of override of each regulating loop is accurately matched by working medium EQUILIBRIUM CALCULATION FOR PROCESS and adjusts feedforward amount, have good anti-interference
Characteristic can inhibit various disturbing factors during removal of load, improve steam parameter Control platform；
2) steam parameter is selected most for different operating conditions in removal of load using the fired power generating unit of technical solution of the present invention
Excellent setting value is conducive to the safe and stable operation of unit so that steam parameter control be effectively ensured in reasonable level；
3) technical solutions according to the invention, structure type is simple, control parameter is intuitive, practical, have it is very strong can
Operability.
Example described in above description is merely for convenience of the understanding of those skilled in the art, the guarantor being not intended to restrict the invention
Protect range.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be in the present invention
In the protection scope of appended claims.
Claims (7)
1. the fired power generating unit bypath system removal of load control strategy under a kind of isolated network mode characterized by comprising control mode
Conversion module, override feedforward computing module, steam parameter control module, wherein；
Control mode conversion module: for according to the removal of load signal determining full load rejection operating condition of real-time monitoring and getting rid of sub-load
Operating condition simultaneously generates conversion instruction, and the conversion instruction includes opening instruction, hand automatic switchover instruction and steam parameter setting instruction fastly；
Override feedforward computing module: for calculating the fast opening amount of override and adjusting feedforward amount that bypass each regulating loop, specifically, root
According to full load rejection operating condition and get rid of partial load condition calculate select high lateral pressure regulating loop the fast opening amount of override and adjust feedforward
Amount calculates the fast opening amount of override in high other temperature reducing regulation circuit according to steam flow instruction by height and adjusts feedforward amount, by height
Steam flow instruction calculates the fast opening amount of override of low lateral pressure regulating loop and adjusts feedforward amount, is instructed according to low other steam flow
It calculates the fast opening amount of override in low other temperature reducing regulation circuit and adjusts feedforward amount；
Steam parameter control module: for being controlled according to the conversion instruction of acquisition, the fast opening amount of override and adjusting feedforward amount.
2. the fired power generating unit bypath system removal of load control strategy under a kind of isolated network mode according to claim 1, special
Sign is, the decision condition of the full load rejection operating condition are as follows: steam turbine trip, generator off-the-line, any in OPC movement act at
It is vertical, the decision condition for getting rid of partial load condition are as follows: the fast load removal of frequency modulation；
Full load rejection is generated when full load rejection operating condition and opens request fastly, and when getting rid of partial load condition, generation is got rid of sub-load and opened fastly
Request, when full load rejection open request fastly or get rid of sub-load open fastly request occur and bypass without it is strong close condition when, finger is opened in generation fastly
It enables；
It includes being immediately performed to start fastly and making and switch to all regulating loops after occurring to open instruction fastly that the hand, which automatically switches instruction,
Manual mode, and the switchback automatic mode after work is started in execution fastly；
Including leading, after reheated steam pressure set points and high and low side valve, desired temperature is cut for the steam parameter setting instruction
It changes；After execution starts work fastly, by desired temperature after desired temperature after main steam pressure setting value, high side valve and low side valve
It is switched to the actual value started before making fastly, the reheated steam pressure set points are switched to unit red switch in full load rejection
Pressure is switched to the actual value started before making fastly when getting rid of sub-load.
3. the fired power generating unit bypath system removal of load control strategy under a kind of isolated network mode according to claim 1, special
Sign is that the fast opening amount of override of the high lateral pressure regulating loop passes through high lateral pressure tune according to steam flow demand by height
Save valve characteristic conversion；Wherein, it when full load rejection operating condition, is needed the main steam flow before removal of load as high other steam flow
The amount of asking makees the sum of the other steam flow instruction of height before steam flow increment by height and removal of load when getting rid of partial load condition
For steam flow demand by height；The feedforward amount of the high lateral pressure regulating loop is high other steam flow increment；
The main steam flow is the sum of steam turbine high pressure cylinder throttle flow and high other steam flow, and the high other steam flow passes through high other
Pressure-regulating valve open degree feedback and main steam temperature, calculation of pressure obtain, and the high other steam flow instruction passes through high lateral pressure
Control valve opening instruction is obtained with main steam temperature, calculation of pressure, and the high other steam flow increment is before and after getting rid of sub-load
The difference power of unit and the product of design steam power ratio.
4. the fired power generating unit bypath system removal of load control strategy under a kind of isolated network mode according to claim 3, special
Sign is that the feedforward amount in the high other temperature reducing regulation circuit is high other attemperation water flow demand, and the high other temperature reducing regulation returns
The fast opening amount of the override on road passes through high other temperature reducing regulation valve characteristic conversion according to the feedforward amount in the high other temperature reducing regulation circuit；
Wherein, the high other attemperation water flow demand designs multiplying for stoichiometric factor with high side desuperheating water for high other steam flow instruction
Product.
5. the fired power generating unit bypath system removal of load control strategy under a kind of isolated network mode according to claim 4, special
Sign is that the feedforward amount of the low lateral pressure regulating loop is the high other steam flow instruction and other attemperation water flow demand
The sum of, the fast opening amount of override of the low lateral pressure regulating loop passes through low side according to the feedforward amount of the low lateral pressure regulating loop
The conversion of pressure-regulating valve characteristic curve.
6. the fired power generating unit bypath system removal of load control strategy under a kind of isolated network mode according to claim 1, special
Sign is that the feedforward amount in the low other temperature reducing regulation circuit is low other attemperation water flow demand, and the low other temperature reducing regulation returns
The fast opening amount of the override on road passes through low other temperature reducing regulation valve characteristic conversion according to the feedforward amount in the low other temperature reducing regulation circuit；
Wherein, the low other attemperation water flow demand designs multiplying for stoichiometric factor with low other desuperheating water for low other steam flow instruction
Product, the low other steam flow instruction are obtained by the instruction of low lateral pressure control valve opening and reheat steam temperature, calculation of pressure.
7. the fired power generating unit bypath system removal of load control strategy under a kind of isolated network mode according to claim 1, special
Sign is, further include between the adjuster and manual operator in all regulating loops series connected valve characteristic curve module carry out it is linear
Matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590343.0A CN110318826B (en) | 2019-07-02 | 2019-07-02 | Load shedding control system of bypass system of thermal power generating unit in isolated grid mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590343.0A CN110318826B (en) | 2019-07-02 | 2019-07-02 | Load shedding control system of bypass system of thermal power generating unit in isolated grid mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110318826A true CN110318826A (en) | 2019-10-11 |
| CN110318826B CN110318826B (en) | 2021-06-29 |
Family
ID=68122276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910590343.0A Active CN110318826B (en) | 2019-07-02 | 2019-07-02 | Load shedding control system of bypass system of thermal power generating unit in isolated grid mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110318826B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829460A (en) * | 2019-11-06 | 2020-02-21 | 华北电力科学研究院有限责任公司 | Primary frequency modulation control method and device |
| CN111123770A (en) * | 2019-12-13 | 2020-05-08 | 山东中实易通集团有限公司 | Method and device for determining opening of bypass model under FCB working condition |
| CN111502787A (en) * | 2020-05-07 | 2020-08-07 | 西安西热节能技术有限公司 | Method for automatically controlling high side valve in high side and low side combined heat supply unit |
| CN112127960A (en) * | 2020-09-07 | 2020-12-25 | 国网湖北省电力有限公司电力科学研究院 | Steam turbine bypass control method based on full-automatic load shedding working condition |
| CN112412558A (en) * | 2020-11-17 | 2021-02-26 | 广西电网有限责任公司电力科学研究院 | Thermal power generating unit control system with quick load shedding function |
| CN112627923A (en) * | 2020-11-30 | 2021-04-09 | 重庆工程职业技术学院 | Steam turbine rotating speed control method based on valve characteristic curve under extreme working condition |
| CN114776406A (en) * | 2022-04-20 | 2022-07-22 | 华北电力科学研究院有限责任公司 | Heat supply bypass fault load reduction method and device based on deep peak regulation working condition |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071978A (en) * | 2010-12-08 | 2011-05-25 | 广东电网公司电力科学研究院 | Method for over-speed protection of turbine under load shedding working condition |
| CN102536343A (en) * | 2012-02-15 | 2012-07-04 | 中国华电工程(集团)有限公司 | System and method for stabilizing frequency and voltage of system during large load phase step of isolated power grid system |
| CN104076801A (en) * | 2014-07-10 | 2014-10-01 | 大唐阳城发电有限责任公司 | Automatic ultrahigh tension long-distance transmission line malfunction load shedding system and method |
| CN106065791A (en) * | 2016-07-26 | 2016-11-02 | 国网浙江省电力公司电力科学研究院 | The control method of a kind of thermal power generation unit primary frequency modulation and system |
| US20170002690A1 (en) * | 2015-06-30 | 2017-01-05 | Mitsubishi Hitachi Power Systems, Ltd. | Activation Control Apparatus |
| CN108448593A (en) * | 2018-02-11 | 2018-08-24 | 华电电力科学研究院有限公司 | A kind of control system and control method shortening the AGC response times |
-
2019
- 2019-07-02 CN CN201910590343.0A patent/CN110318826B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071978A (en) * | 2010-12-08 | 2011-05-25 | 广东电网公司电力科学研究院 | Method for over-speed protection of turbine under load shedding working condition |
| CN102536343A (en) * | 2012-02-15 | 2012-07-04 | 中国华电工程(集团)有限公司 | System and method for stabilizing frequency and voltage of system during large load phase step of isolated power grid system |
| CN104076801A (en) * | 2014-07-10 | 2014-10-01 | 大唐阳城发电有限责任公司 | Automatic ultrahigh tension long-distance transmission line malfunction load shedding system and method |
| US20170002690A1 (en) * | 2015-06-30 | 2017-01-05 | Mitsubishi Hitachi Power Systems, Ltd. | Activation Control Apparatus |
| CN106065791A (en) * | 2016-07-26 | 2016-11-02 | 国网浙江省电力公司电力科学研究院 | The control method of a kind of thermal power generation unit primary frequency modulation and system |
| CN108448593A (en) * | 2018-02-11 | 2018-08-24 | 华电电力科学研究院有限公司 | A kind of control system and control method shortening the AGC response times |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829460B (en) * | 2019-11-06 | 2021-04-09 | 华北电力科学研究院有限责任公司 | Primary frequency modulation control method and device |
| CN110829460A (en) * | 2019-11-06 | 2020-02-21 | 华北电力科学研究院有限责任公司 | Primary frequency modulation control method and device |
| CN111123770A (en) * | 2019-12-13 | 2020-05-08 | 山东中实易通集团有限公司 | Method and device for determining opening of bypass model under FCB working condition |
| CN111123770B (en) * | 2019-12-13 | 2021-09-24 | 山东中实易通集团有限公司 | Method and device for determining opening of bypass model under FCB working condition |
| CN111502787B (en) * | 2020-05-07 | 2022-08-16 | 西安西热节能技术有限公司 | Method for automatically controlling high side valve in high side and low side combined heat supply unit |
| CN111502787A (en) * | 2020-05-07 | 2020-08-07 | 西安西热节能技术有限公司 | Method for automatically controlling high side valve in high side and low side combined heat supply unit |
| CN112127960A (en) * | 2020-09-07 | 2020-12-25 | 国网湖北省电力有限公司电力科学研究院 | Steam turbine bypass control method based on full-automatic load shedding working condition |
| CN112127960B (en) * | 2020-09-07 | 2022-06-24 | 国网湖北省电力有限公司电力科学研究院 | Steam turbine bypass control method based on full-automatic load shedding working condition |
| CN112412558A (en) * | 2020-11-17 | 2021-02-26 | 广西电网有限责任公司电力科学研究院 | Thermal power generating unit control system with quick load shedding function |
| CN112627923A (en) * | 2020-11-30 | 2021-04-09 | 重庆工程职业技术学院 | Steam turbine rotating speed control method based on valve characteristic curve under extreme working condition |
| CN112627923B (en) * | 2020-11-30 | 2022-12-02 | 重庆工程职业技术学院 | Steam turbine rotating speed control method based on valve characteristic curve under extreme working condition |
| CN114776406A (en) * | 2022-04-20 | 2022-07-22 | 华北电力科学研究院有限责任公司 | Heat supply bypass fault load reduction method and device based on deep peak regulation working condition |
| CN114776406B (en) * | 2022-04-20 | 2024-01-26 | 华北电力科学研究院有限责任公司 | Heat supply bypass fault load reduction method and device based on deep peak shaving working condition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110318826B (en) | 2021-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110318826A (en) | Fired power generating unit bypath system removal of load control strategy under isolated network mode | |
| CN111535879B (en) | Control method for bypass system of gas-steam combined cycle unit | |
| CN110460114B (en) | Primary frequency modulation control method of thermal power generating unit based on frequency modulation load instruction compensation | |
| US7457688B2 (en) | Method and system for detection and transfer to electrical island operation | |
| CN103791485B (en) | Optimal control method of water supply system of thermal power generating unit | |
| CN101320255B (en) | Thermal power unit coal-burning thermal value real time monitoring method and thermal value observer | |
| CN105678105B (en) | The online evaluation method and apparatus of steam turbine Primary frequency control ability | |
| CN105135409B (en) | Supercritical unit boiler master controller control method based on primary frequency modulation action amplitude | |
| CN104865830A (en) | Dual-intelligent-optimization control method for unit load | |
| CN107178778B (en) | Steam Temperature for Boiler control device, system and method | |
| CN104865925A (en) | Electricity generation power instruction feed-forward control method of thermal power generating unit coordination control system | |
| CN110212552A (en) | The control method and system of thermal power generation unit primary frequency modulation | |
| CN109378833B (en) | Method for realizing rapid frequency modulation of unit by controlling steam extraction amount of steam turbine | |
| WO1989009996A1 (en) | Automatic steam generator control at low power | |
| CN107341559A (en) | A kind of Primary frequency control ability Forecasting Methodology based on main vapour pressure tolerance | |
| CN109857033A (en) | Condensate throttling switching control method, device and computer equipment | |
| CN109631007A (en) | A kind of generating set boiler master system fuel feedback signal optimized treatment method | |
| CN112072677A (en) | Pumped storage and electrochemical storage combined participation power grid load frequency control method based on fractional order PID | |
| CN104617589B (en) | Control method and system for improving one-time frequency-modulated control stability of generator set | |
| CN206830241U (en) | The steam distribution system of steam turbine | |
| CN210088824U (en) | Self-adaptive adjusting device for end difference of heater of thermal power generating unit | |
| CN201225992Y (en) | Observer for thermal power generating units fire coal caloricity | |
| RU2156865C2 (en) | Turbine speed governing system and method for controlling turbine speed at load shedding | |
| KR102226983B1 (en) | Control system, gas turbine, power plant and fuel temperature control method | |
| CN113847594A (en) | Automatic control system and method for main steam temperature of subcritical thermal power generating unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200409 Address after: 610000 No.1, floor 1, unit 1, building 24, No.24, Qinghua Road, Qingyang District, Chengdu City, Sichuan Province Applicant after: State Grid Sichuan comprehensive energy service Co., Ltd. Sichuan Electric Power Engineering Branch Address before: 610000 Jinjiang District, Chengdu, Sichuan Applicant before: SICHUAN ELECTRIC POWER INDUSTRY ADJUSTMENT & TEST INSTITUTE |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211217 Address after: No.1, floor 1, unit 1, building 24, No.24, Qinghua Road, Qingyang District, Chengdu, Sichuan 610000 Patentee after: State Grid Sichuan comprehensive energy service Co.,Ltd. Sichuan Electric Power Engineering Branch Patentee after: Sichuan Electric Power Design Consulting Co., Ltd Address before: No.1, floor 1, unit 1, building 24, No.24, Qinghua Road, Qingyang District, Chengdu, Sichuan 610000 Patentee before: State Grid Sichuan comprehensive energy service Co.,Ltd. Sichuan Electric Power Engineering Branch |