CN106899028B - The compensation method of coal-fired turbine LP rotors Primary frequency control ability economy - Google Patents
The compensation method of coal-fired turbine LP rotors Primary frequency control ability economy Download PDFInfo
- Publication number
- CN106899028B CN106899028B CN201710198544.7A CN201710198544A CN106899028B CN 106899028 B CN106899028 B CN 106899028B CN 201710198544 A CN201710198544 A CN 201710198544A CN 106899028 B CN106899028 B CN 106899028B
- Authority
- CN
- China
- Prior art keywords
- turbine
- coal
- primary frequency
- rotors
- control ability
- 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.)
- Active
Links
Classifications
-
- 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
-
- 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
- F01D17/10—Final actuators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The compensation method of coal-fired turbine LP rotors Primary frequency control ability economy is related to the compensation technique field of coal-fired turbine LP rotors Primary frequency control ability economy.The present invention is to solve the problem of that unit Primary frequency control ability can also change after coal-fired turbine LP rotors back pressure deviates rated designs operating condition at present.The primary frequency modulation compensation method of fire coal turbine LP rotors economy of the present invention, after turbine back pressure changes, specific aim modifies diversity factor setting, when guaranteeing rotation speed change 1%, so that generated output is changed 20% by primary frequency modulation.Guarantee turbine back pressure after deviateing rated designs operating condition, coal-fired turbine LP rotors still have same Primary frequency control ability.The compensation method of fire coal turbine LP rotors Primary frequency control ability economy of the present invention, the compensation suitable for coal-fired turbine LP rotors Primary frequency control ability economy.
Description
Technical field
The invention belongs to the compensation technique fields of coal-fired turbine LP rotors Primary frequency control ability economy.
Background technique
In recent years, China's wind-powered electricity generation and photovoltaic power generation were grown rapidly, as country promotes energy resource structure transition and upgrade, wind-powered electricity generation
It will continue to remain powerful growth momentum with photovoltaic power generation.However, equivalent load will be in when wind-powered electricity generation, photovoltaic ratio are higher
Now significant random fluctuation characteristic, this also proposed the frequency security for the system that significantly affects higher to the fm capacity of system
Requirement.
Coal-fired turbine LP rotors primary frequency modulation is when network load changes, and steam turbine control system is automatically
According to the power of the variation adjustment steam turbine of revolving speed, and then the variation of mains frequency is limited in certain limit.Coal-burning steam
Turbine generator group primary frequency modulation is in the control water for guaranteeing the safe and economic operation of power grid, improving power quality and power grid frequency modulation
Frequency fluctuation etc. important role caused by flat, rapid elimination changes due to network load.
Two factors of fire coal turbine LP rotors primary frequency modulation factor setting at present, frequency dead band and speed governor droop
All by the way of definite value, when turbine back pressure changes, the two factors do not change.In this case, back pressure
After deviateing rated designs operating condition, unit Primary frequency control ability can also change.
Summary of the invention
The present invention is to solve after coal-fired turbine LP rotors back pressure deviates rated designs operating condition at present, and unit is primary
The problem of fm capacity can also change now provides the compensation side of coal-fired turbine LP rotors Primary frequency control ability economy
Method.
The compensation method of coal-fired turbine LP rotors Primary frequency control ability economy, by coal-fired steam turbine rated speed
Primary frequency modulation factor K is generated after function F (x) conversion with the difference x of actual speed,
Using turbine back pressure current value Y and primary frequency modulation factor K, new frequency modulation factor K is obtained according to the following formula*:
Wherein, δ△(Y) it is diversity factor correction factor, is determined by turbine back pressure current value Y,
By new frequency modulation factor K*It is added on the active power instruction given value P of coal-fired steam turbine, obtains compensated
Active power instructionTo control the pitch aperture of coal-fired steam turbine, coal-fired turbine LP rotors Primary frequency control ability is completed
The compensation of economy.
Influence of the turbine back pressure current value Y to primary frequency modulation passes through diversity factor correction factor δ△(Y) it compensates, differs
Rate correction factor δ△(Y) preparation method is as follows:
Steam turbine heat balance diagram is inquired, the specified enthalpy drop before and after acquisition steam turbine is h0,
At turbine back pressure current value Y, using isentropic enthalpy drop, ideal enthalpy drop method, the enthalpy drop before and after being currently depressed steam turbine is obtained
hY, then:
Different turbine back pressure current value Y, corresponding different diversity factor correction factor δ△(Y), it takes:
Compensated active power instructionExpression formula it is as follows:
After the present invention is in order to guarantee that coal-fired turbine LP rotors turbine back pressure deviates rated designs operating condition, coal-fired steamer
Machine generating set still has same Primary frequency control ability, proposes the primary frequency modulation of coal-fired turbine LP rotors economy
Compensation method.This method has the effect that
The primary frequency modulation compensation method of fire coal turbine LP rotors economy of the present invention, works as turbine back pressure
After changing, specific aim, which modifies diversity factor setting, changes generated output by primary frequency modulation when guaranteeing rotation speed change 1%
20%.Guarantee turbine back pressure after deviateing rated designs operating condition, coal-fired turbine LP rotors still have same primary tune
Frequency ability.
The compensation method of fire coal turbine LP rotors Primary frequency control ability economy of the present invention, is suitable for combustion
The compensation of coal turbine LP rotors Primary frequency control ability economy.
Detailed description of the invention
Fig. 1 is existing coal-fired turbine LP rotors primary frequency modulation setting procedure figure；
The compensation method process of Fig. 2 coal-fired turbine LP rotors Primary frequency control ability economy of the present invention
Figure.
Specific embodiment
As shown in Figure 1, currently, coal-fired turbine LP rotors primary frequency function is by turbine speed and rated speed
Difference be directly converted into active power instruction, it is specific:
The difference x of coal-fired steam turbine rated speed (generally 3000r/min) and actual speed is after function F (x) conversion
Primary frequency modulation factor K is generated,
Function F's (x) specific formula is as follows:
Wherein, del (x) indicates x by dead zone, and δ is speed governor droop.
Primary frequency modulation factor K is directly superimposed on the active power instruction given value P of coal-fired steam turbine, after obtaining frequency modulation
Active power instructs PK, to control the pitch aperture of coal-fired steam turbine.
Coal-fired turbine LP rotors primary frequency function, it is desirable that rotation speed change 1% requires power generation function by primary frequency modulation
Rate variation 20%.Coal-fired turbine LP rotors primary frequency modulation diversity factor δ is generally set as δ=0.05, in rated designs operating condition
Under, it is sufficient to meet above-mentioned requirements.
But when turbine back pressure changes, and deviates rated designs operating condition, diversity factor δ=0.05 is just not enough to full
Sufficient above-mentioned requirements.Therefore it provides following implementation solves the above problems.
Specific embodiment 1: illustrating present embodiment, coal-fired steam turbine hair described in present embodiment referring to Fig. 2
The compensation method of motor group Primary frequency control ability economy,
Using turbine back pressure current value Y and primary frequency modulation factor K, new frequency modulation factor K is obtained according to the following formula*:
Wherein, δ△(Y) it is diversity factor correction factor, is determined by turbine back pressure current value Y,
By new frequency modulation factor K*It is added on the active power instruction given value P of coal-fired steam turbine, obtains compensated
Active power instructionTo control the pitch aperture of coal-fired steam turbine.
The primary frequency modulation compensation method of coal-fired turbine LP rotors economy, works as steam turbine described in present embodiment
After back pressure changes, specific aim, which modifies diversity factor setting, makes generated output by primary frequency modulation when guaranteeing rotation speed change 1%
Variation 20%.
Specific embodiment 2: present embodiment is to coal-fired turbine LP rotors one described in specific embodiment one
The compensation method of secondary fm capacity economy is described further, in present embodiment,
Influence of the turbine back pressure current value Y to primary frequency modulation passes through diversity factor correction factor δ△(Y) it compensates, differs
Rate correction factor δ△(Y) preparation method is as follows:
Steam turbine heat balance diagram is inquired, the specified enthalpy drop before and after acquisition steam turbine is h0,
At turbine back pressure current value Y, using isentropic enthalpy drop, ideal enthalpy drop method, the enthalpy drop before and after being currently depressed steam turbine is obtained
hY, then:
In present embodiment, different turbine back pressure current value Y, corresponding different diversity factor correction factor δ△(Y),
It takes:
It can guarantee rotation speed change 1%, so that generated output is changed 20% by primary frequency modulation, it is same to guarantee that fired power generating unit has
The Primary frequency control ability of sample.
Specific embodiment 3: present embodiment is to coal-fired turbine LP rotors one described in specific embodiment one
The compensation method of secondary fm capacity economy is described further, in present embodiment, compensated active power instruction
Expression formula it is as follows:
Claims (3)
1. the compensation method of coal-fired turbine LP rotors Primary frequency control ability economy, by coal-fired steam turbine rated speed with
The difference x of actual speed generates primary frequency modulation factor K after function F (x) conversion, and the formula of function F (x) is as follows:
Wherein, del (x) indicates x by dead zone, and δ is speed governor droop,
It is characterized in that,
Using turbine back pressure current value Y and primary frequency modulation factor K, new frequency modulation factor K is obtained according to the following formula*:
Wherein, δΔ(Y) it is diversity factor correction factor, is determined by turbine back pressure current value Y,
By new frequency modulation factor K*It is added on the active power instruction given value P of coal-fired steam turbine, obtains compensated wattful power
Rate instructionTo control the pitch aperture of coal-fired steam turbine, completes coal-fired turbine LP rotors Primary frequency control ability back pressure and become
The compensation of change.
2. the compensation method of fire coal turbine LP rotors Primary frequency control ability economy according to claim 1,
It is characterized in that, influence of the turbine back pressure current value Y to primary frequency modulation passes through diversity factor correction factor δΔ(Y) it compensates, no
Etc. rates correction factor δΔ(Y) preparation method is as follows:
Steam turbine heat balance diagram is inquired, the specified enthalpy drop before and after acquisition steam turbine is h0,
At turbine back pressure current value Y, using isentropic enthalpy drop, ideal enthalpy drop method, the enthalpy drop h before and after being currently depressed steam turbine is obtainedY, then:
3. the compensation method of fire coal turbine LP rotors Primary frequency control ability economy according to claim 1,
It is characterized in that, compensated active power instructionExpression formula it is as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710198544.7A CN106899028B (en) | 2017-03-29 | 2017-03-29 | The compensation method of coal-fired turbine LP rotors Primary frequency control ability economy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710198544.7A CN106899028B (en) | 2017-03-29 | 2017-03-29 | The compensation method of coal-fired turbine LP rotors Primary frequency control ability economy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106899028A CN106899028A (en) | 2017-06-27 |
| CN106899028B true CN106899028B (en) | 2019-07-05 |
Family
ID=59193601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710198544.7A Active CN106899028B (en) | 2017-03-29 | 2017-03-29 | The compensation method of coal-fired turbine LP rotors Primary frequency control ability economy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106899028B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374694B (en) * | 2019-06-05 | 2022-06-14 | 陕西渭河发电有限公司 | Safety control method for high-back-pressure heat supply unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089342B (en) * | 2011-11-04 | 2014-11-12 | 华北电力科学研究院有限责任公司 | Steam turbine and speed regulating system model parameter correcting method thereof |
| CN105571343A (en) * | 2014-10-31 | 2016-05-11 | 王砧 | Operation back pressure continuous optimized control method and system for air-cooled generator unit steam turbine |
| 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 |
-
2017
- 2017-03-29 CN CN201710198544.7A patent/CN106899028B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089342B (en) * | 2011-11-04 | 2014-11-12 | 华北电力科学研究院有限责任公司 | Steam turbine and speed regulating system model parameter correcting method thereof |
| CN105571343A (en) * | 2014-10-31 | 2016-05-11 | 王砧 | Operation back pressure continuous optimized control method and system for air-cooled generator unit steam turbine |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106899028A (en) | 2017-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105826936B (en) | A kind of fired power generating unit intelligence primary frequency modulation control method for power grid large frequency-difference | |
| CN108518307B (en) | Power control method, control device, controller and system of wind generating set | |
| CN103259475B (en) | Based on frequency synchronization method and device in the double fed induction generators of power-balance | |
| CN108683200B (en) | Method for participating in primary frequency modulation of power grid through compressed air energy storage | |
| Zhang et al. | Inertia emulation through supercapacitor energy storage systems | |
| CN107171368B (en) | Wind power generation primary frequency modulation function implementation method based on wind power plant power control | |
| CN101864994A (en) | Correction method for optimization of sliding pressure of large steam turbine | |
| CN106899027B (en) | The Primary frequency control ability compensation method of steam turbine lofty tone valve flow kinematic nonlinearity | |
| CN109659961B (en) | Dynamic power system load frequency coordination method based on frequency division control | |
| CN106877410B (en) | Fired power generating unit Primary frequency control ability compensation method | |
| CN104836254A (en) | Power grid black start-up system and black start-up participation method of photovoltaic power station | |
| CN106329536B (en) | A kind of control method for realizing Wind turbines voltage regulation and frequency modulation | |
| CN104716671A (en) | Black-start method for power grid | |
| CN107623327A (en) | Generating set primary frequency regulation dynamic compensation method and system based on steam enthalpy drop | |
| Ganesh et al. | Performance analysis and MPPT control of a standalone hybrid power generation system | |
| CN106899028B (en) | The compensation method of coal-fired turbine LP rotors Primary frequency control ability economy | |
| CN106451548B (en) | The determination method of Wind turbines collaboration frequency modulation optimal exit time | |
| CN104617588A (en) | Reactor power control method and system of nuclear power unit during primary frequency modulation | |
| CN109768574A (en) | Suitable for weak VSC grid-connected system low voltage crossing oscillation suppression method off the net | |
| CN106870024B (en) | The Primary frequency control ability compensation method of coal-fired turbine LP rotors heating | |
| CN107154645A (en) | Method for enabling residual pressure waste heat generator set to participate in AGC (automatic gain control) adjustment of power plant | |
| CN104767205B (en) | Method for establishing automatic generation control system of electric power system based on wind power plant access | |
| CN109634106A (en) | A kind of fired power generating unit main steam pressure setting optimization method | |
| CN209637940U (en) | A kind of off-network type wind generator system for distributed cold and heat alliance | |
| Wang et al. | Research on Reactive Power Control of the Grid-Side Converter of DFIG Based Wind Farm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210823 Address after: 102200 5th and 6th floors, building a, 18 Binhe Avenue, future science and Technology City, Changping District, Beijing Patentee after: STATE GRID ECONOMIC AND TECHNOLOGICAL RESEARCH INSTITUTE CO. LTD.B412, STATE GRID OFFICE Patentee after: HARBIN INSTITUTE OF TECHNOLOGY Patentee after: ECONOMIC TECHNOLOGY RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER Co. Patentee after: HARBIN RANZHUO TECHNOLOGY DEVELOPMENT CO.,LTD. Address before: 102209 State Grid office area a220, North District of future science and Technology City, Changping District, Beijing Patentee before: BEIJING HUAJIAN NETWORK DESIGN INSTITUTE OF POWER SOURCE Patentee before: HARBIN INSTITUTE OF TECHNOLOGY Patentee before: ECONOMIC TECHNOLOGY RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER Co. Patentee before: HARBIN RANZHUO TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230424 Address after: 102200 5th and 6th floors, building a, 18 Binhe Avenue, future science and Technology City, Changping District, Beijing Patentee after: STATE GRID ECONOMIC AND TECHNOLOGICAL RESEARCH INSTITUTE CO. LTD.B412, STATE GRID OFFICE Patentee after: HARBIN INSTITUTE OF TECHNOLOGY Patentee after: ECONOMIC TECHNOLOGY RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER Co. Patentee after: Harbin Xinrentong Technology Development Co.,Ltd. Address before: 102200 5th and 6th floors, building a, 18 Binhe Avenue, future science and Technology City, Changping District, Beijing Patentee before: STATE GRID ECONOMIC AND TECHNOLOGICAL RESEARCH INSTITUTE CO. LTD.B412, STATE GRID OFFICE Patentee before: HARBIN INSTITUTE OF TECHNOLOGY Patentee before: ECONOMIC TECHNOLOGY RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER Co. Patentee before: HARBIN RANZHUO TECHNOLOGY DEVELOPMENT CO.,LTD. |