CN102953775A - Automatic power generation control system based on gas-steam combined heat and power supply unit - Google Patents
Automatic power generation control system based on gas-steam combined heat and power supply unit Download PDFInfo
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- CN102953775A CN102953775A CN2011102432148A CN201110243214A CN102953775A CN 102953775 A CN102953775 A CN 102953775A CN 2011102432148 A CN2011102432148 A CN 2011102432148A CN 201110243214 A CN201110243214 A CN 201110243214A CN 102953775 A CN102953775 A CN 102953775A
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Abstract
The invention provides an automatic power generation control system based on a gas-steam combined heat and power supply unit. The automatic power generation control system comprises a unit system, a boil subsystem, a turbine subsystem and an automatic power generation control unit. The unit system outputs electric power by means of received fuel, air and feedwater; the boiler subsystem is connected with the unit system; the turbine subsystem is connected with the unit system; and the automatic power generation control unit is electrically connected with the unit system, the boiler subsystem and the turbine subsystem and adjusts the boiler subsystem and the turbine system at least according to signals acquired from the unit system. Aiming at characteristics of heat supply combined cyclic charge control, the automatic power generation control system based on a gas-steam combined heat and power supply unit takes a combined cycle as a unit to control charges of a boiler and a turbine.
Description
Technical field
The present invention relates to a kind of novel automatic electricity generation control system based on gas-steam combined cogeneration unit.
Background technique
Automatic Generation Control is one of the paid assistant service that factory provides of generating electricity by way of merging two or more grid systems, generator set is in the adjustment range of exerting oneself of regulation, follow the tracks of the instruction that the power scheduling mechanism of exchange issues, adjust in real time generated output according to certain regulations speed, the service that requires to satisfy the control of power system frequency and interconnection power.In other words, Automatic Generation Control (AGC) is exerted oneself to the electrical network part of generating units and is carried out the secondary adjustment, to satisfy the control target call; Its fundamental function is: LOAD FREQUENCY control (LFC), and economic load dispatching control (EDC), spare capacity monitors (RM), AGC performance monitoring (AGC PM), tie-line bias control (TBC) etc.; To reach its basic target: guarantee generated output and balancing the load, guarantee that system frequency is rating value, make clean regional interconnection trend equate Minimum Area operating cost with plan.
Automatic Generation Control solves emphatically frequency adjustment and the load distribution problem that electric power system is in operation, and and adjacent electric power system between carry out according to plan Power Exchange.The frequency of supply of electric power system is one of major parameter of the normal operation of system.When the gross output of system power supply balanced each other with the power consumpiton that comprises electric load, it is constant that frequency of supply keeps; If during disequilibrium, frequency just fluctuates between gross output and the total power consumption, can the frequency of occurrences collapse when serious.The load of electric power system is constantly to change, and this variation causes that sometimes system power is uneven, causes frequency fluctuation.Guarantee the quality of electric energy, just must monitor and adjust power system frequency.Behind the frequency departure rating value, the exerting oneself so that the active power of electric power system reaches new balance of regulator generator, thus frequency can be maintained within the allowed band.So Automatic Generation Control is to realize by monitoring, adjustment to frequency of supply.
Summary of the invention
The invention provides a kind of novel automatic electricity generation control system based on gas-steam combined cogeneration unit.Particularly, the invention provides a kind of automatic electricity generation control system based on gas-steam combined cogeneration unit, comprising:
Machine set system utilizes the fuel, air and the feedwater that receive to the electrical network output power;
The boiler subtense angle is connected with described machine set system;
The steam turbine subtense angle is connected with described machine set system; And
Described boiler subtense angle and described turbine system are also regulated according to the signal that collects from described machine set system at least with described machine set system, boiler subtense angle and the electrical connection of steam turbine subtense angle in the Automatic Generation Control unit.
According to a preferred embodiment, in above-mentioned automatic electricity generation control system, described machine set system further comprises: boiler, in order to export steam; Steam turbine is the rotary machine energy with the thermal power transfer of the steam of described boiler output; And generator, the rotary machine of exporting by described steam turbine can generate electricity.
According to a preferred embodiment, in above-mentioned automatic electricity generation control system, described boiler subtense angle is electrically connected and controls the feed valve of described boiler.
According to a preferred embodiment, in above-mentioned automatic electricity generation control system, described steam turbine subtense angle is electrically connected and controls the steam input valve of described steam turbine.
According to a preferred embodiment, in above-mentioned automatic electricity generation control system, described Automatic Generation Control unit gathers the load of described generator, and by a default speed described boiler subtense angle and described steam turbine subtense angle is implemented proportion integration differentiation control according to described load.
According to a preferred embodiment, in above-mentioned automatic electricity generation control system, described Automatic Generation Control unit comprises a manual input interface, to allow manually to set the Automatic Generation Control strategy.
According to a preferred embodiment, in above-mentioned automatic electricity generation control system, described Automatic Generation Control strategy comprises pressure definite value and the feeding coal of regulating described boiler according to the load of the generator that collects via described boiler subtense angle.
According to a preferred embodiment, in above-mentioned automatic electricity generation control system, described Automatic Generation Control strategy comprises according to the load of the generator that collects regulates pressure and output power before the machine of described steam turbine via described steam turbine subtense angle.
The characteristics of controlling for heat supply combined cycle load based on the automatic electricity generation control system of gas-steam combined cogeneration unit of the present invention take a cover combined cycle as unit, are controlled the load of boiler and steam turbine.Control strategy is for by direct control combustion machine load, realizes simultaneously indirectly control that steam turbine is loaded, finally makes the total load of combined cycle satisfy the requirement of dispatching of power netwoks instruction.To provide the generating high-quality electric power product to local electrical network.In the present invention, combined cycle total load control adoption rate integral differential (PID) control adds feedforward, when the total load instruction changed, the feed-forward loop root section changed the instruction of combustion machine load according to combustion machine load proportion by given pace, and the effect of PID controller mainly was fine setting and eliminated static difference this moment.When heating load changes, then mainly regulate combustion machine load by PID, make the unit gross capability consistent with dispatch command.For the difference of combustion machine and steam turbine load responding speed, adopt feedforward to add the control mode of PID, can avoid the vibration that control loop occurs in the steam turbine load alternation process.
Should be appreciated that the above generality of the present invention is described and the following detailed description all is exemplary and explanat, and be intended to the further explanation that the invention provides for as claimed in claim.
Description of drawings
Accompanying drawing mainly is be used to providing the present invention further to be understood.Accompanying drawing shows embodiments of the invention, and plays the effect of explaining the principle of the invention with this specification.In the accompanying drawing:
Fig. 1 schematically shows the structure of automatic electricity generation control system according to an embodiment of the invention.
Embodiment
Describe technological scheme of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 schematically shows the structure of automatic electricity generation control system according to an embodiment of the invention.As shown in Figure 1, automatic electricity generation control system of the present invention can comprise at least: machine set system 101, boiler subtense angle 102, steam turbine subtense angle 103 and Automatic Generation Control unit 104.
In addition, as shown in Figure 1, in above-mentioned automatic electricity generation control system, machine set system 101 further comprise exporting steam boiler 105, with the thermal power transfer of the steam of described boiler 105 outputs be rotary machine can steam turbine 106 and the generator 107 that can generate electricity by the rotary machine of described steam turbine 106 outputs.
Preferably, boiler subtense angle 102 is electrically connected and controls the feed valve 108 of described boiler 105, and the steam input valve 109 of 103 electrical connections of steam turbine subtense angle and control steam turbine 106, as shown in the embodiment of Fig. 1.
Especially, in above-mentioned automatic electricity generation control system, described Automatic Generation Control unit 104 gathers the load of described generator 107, and by a default speed described boiler subtense angle 102 and described steam turbine subtense angle 103 is implemented proportion integration differentiation control according to described load.Automatic Generation Control unit 104 also preferably includes a manual input interface (not shown), manually sets the Automatic Generation Control strategy to allow the user.
In one embodiment, in above-mentioned automatic electricity generation control system, described Automatic Generation Control strategy comprises pressure definite value and the feeding coal of regulating described boiler according to the load of the generator that collects via described boiler subtense angle.In another embodiment, described Automatic Generation Control strategy comprises according to the load of the generator that collects and regulates pressure and output power before the machine of described steam turbine via described steam turbine subtense angle.
In sum, according to the present invention, under the stable prerequisite of heat load, when grid dispatching center changes the instruction of combined cycle total load, for example need to increase load, the combustion prow increases first exerts oneself, when the fast burden requirement of responsive electricity grid, the exhaust heat boiler steam output increase that waits combustion machine application of load to bring were slowly risen the beginning of steam turbine load gradually, the combustion machine then begins to reduce exerted oneself, total load and dispatch command are consistent, until steam turbine load uphill process finishes.
Under the stable prerequisite of electric load, when the Craft in Chemical Industrial Area heat load changed, for example heating load increased, and then the load of steam turbine is with corresponding fast reducing, and the combined cycle total load will be lower than the scheduling automatic generation control instruction.Then fire the chance increase and exert oneself, total load and dispatch command are consistent.The process that heating load reduces is identical with the heating load increase, all is to control the unit gross capability by the combustion owner.
By Automatic Generation Control power control circuit, the scope that comes into operation, varying duty rate test, optimize function group logics at different levels to guarantee that each parameter remains in the rated range when electric load and heat load change.For avoiding during Automatic Generation Control puts into operation the frequent occurrence burning to switch, prevent that heating load from changing the excessive steam turbine load that affects, determine the Automatic Generation Control load upper and lower scope that puts into operation by testing.
Above-described embodiment provides to those of ordinary skills and realizes or use of the present invention; those of ordinary skills can be in the situation that does not break away from invention thought of the present invention; above-described embodiment is made various modifications or variation; thereby protection scope of the present invention do not limit by above-described embodiment, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (8)
1. the automatic electricity generation control system based on gas-steam combined cogeneration unit is characterized in that, comprising:
Machine set system utilizes the fuel, air and the feedwater that receive to the electrical network output power;
The boiler subtense angle is connected with described machine set system;
The steam turbine subtense angle is connected with described machine set system; And
Described boiler subtense angle and described turbine system are also regulated according to the signal that collects from described machine set system at least with described machine set system, boiler subtense angle and the electrical connection of steam turbine subtense angle in the Automatic Generation Control unit.
2. automatic electricity generation control system as claimed in claim 1 is characterized in that, described machine set system further comprises:
Boiler is in order to export steam;
Steam turbine is the rotary machine energy with the thermal power transfer of the steam of described boiler output; And
Generator, the rotary machine of exporting by described steam turbine can generate electricity.
3. automatic electricity generation control system as claimed in claim 2 is characterized in that, described boiler subtense angle is electrically connected and controls the feed valve of described boiler.
4. automatic electricity generation control system as claimed in claim 2 is characterized in that, described steam turbine subtense angle is electrically connected and controls the steam input valve of described steam turbine.
5. automatic electricity generation control system as claimed in claim 2, it is characterized in that, described Automatic Generation Control unit gathers the load of described generator, and by a default speed described boiler subtense angle and described steam turbine subtense angle is implemented proportion integration differentiation control according to described load.
6. automatic electricity generation control system as claimed in claim 5 is characterized in that, described Automatic Generation Control unit comprises a manual input interface, to allow manually to set the Automatic Generation Control strategy.
7. automatic electricity generation control system as claimed in claim 6 is characterized in that, described Automatic Generation Control strategy comprises pressure definite value and the feeding coal of regulating described boiler according to the load of the generator that collects via described boiler subtense angle.
8. automatic electricity generation control system as claimed in claim 6 is characterized in that, described Automatic Generation Control strategy comprises according to the load of the generator that collects regulates pressure and output power before the machine of described steam turbine via described steam turbine subtense angle.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437838A (en) * | 2013-08-01 | 2013-12-11 | 国家电网公司 | Method for effectively improving quick response on external load change for generator set |
| CN103836640A (en) * | 2014-03-22 | 2014-06-04 | 林启东 | Boiler feeding automatic adjusting device for steam power generation equipment |
| CN103885433A (en) * | 2014-04-03 | 2014-06-25 | 北京京桥热电有限责任公司 | Power plant production and management control system |
| CN103995514A (en) * | 2014-05-27 | 2014-08-20 | 中国轻工业南宁设计工程有限公司 | Combined heat and power generation PLC control system |
| CN104536404A (en) * | 2014-12-17 | 2015-04-22 | 马钢(集团)控股有限公司 | Automatic load regulation system and method for dry quenching waste heat power generation |
| CN104807071A (en) * | 2014-01-28 | 2015-07-29 | 国家电网公司 | Heat supply unit adjusting method and device |
| US9507365B2 (en) | 2014-06-24 | 2016-11-29 | Woodward, Inc. | Adaptive PID control system for industrial turbines |
| CN107154645A (en) * | 2017-05-31 | 2017-09-12 | 河北冀研能源科学技术研究院有限公司 | Method for enabling residual pressure waste heat generator set to participate in AGC (automatic gain control) adjustment of power plant |
| CN107370156A (en) * | 2017-08-24 | 2017-11-21 | 赫普科技发展（北京）有限公司 | A kind of power grid frequency modulation system based on electrode boiler |
| CN107842909A (en) * | 2017-10-13 | 2018-03-27 | 滕州富源低热值燃料热电有限公司 | A kind of system for expanding cogeneration of heat and power central heating scale |
| CN108153256A (en) * | 2017-12-15 | 2018-06-12 | 青岛华丰伟业电力科技工程有限公司 | A kind of multicomputer gas-steam combined cycle power plant duty control method |
| CN109901386A (en) * | 2017-12-11 | 2019-06-18 | 国电科学技术研究院 | A kind of thermoelectricity unit combination control method and system |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437838B (en) * | 2013-08-01 | 2015-06-03 | 国家电网公司 | Method for effectively improving quick response on external load change for generator set |
| CN103437838A (en) * | 2013-08-01 | 2013-12-11 | 国家电网公司 | Method for effectively improving quick response on external load change for generator set |
| CN104807071B (en) * | 2014-01-28 | 2017-12-08 | 国家电网公司 | Thermal power plant unit method of adjustment and device |
| CN104807071A (en) * | 2014-01-28 | 2015-07-29 | 国家电网公司 | Heat supply unit adjusting method and device |
| CN103836640A (en) * | 2014-03-22 | 2014-06-04 | 林启东 | Boiler feeding automatic adjusting device for steam power generation equipment |
| CN103836640B (en) * | 2014-03-22 | 2016-04-20 | 林启东 | The boiler feeds self-checking device of steam generating equipment |
| CN103885433A (en) * | 2014-04-03 | 2014-06-25 | 北京京桥热电有限责任公司 | Power plant production and management control system |
| CN103885433B (en) * | 2014-04-03 | 2016-06-01 | 北京京桥热电有限责任公司 | Power plant produces and management control system |
| CN103995514A (en) * | 2014-05-27 | 2014-08-20 | 中国轻工业南宁设计工程有限公司 | Combined heat and power generation PLC control system |
| US10359798B2 (en) | 2014-06-24 | 2019-07-23 | Woodward, Inc. | Adaptive PID control system for industrial turbines |
| US9507365B2 (en) | 2014-06-24 | 2016-11-29 | Woodward, Inc. | Adaptive PID control system for industrial turbines |
| CN104536404B (en) * | 2014-12-17 | 2017-03-08 | 马钢(集团)控股有限公司 | Dry coke quenching cogeneration load automatic regulating system and method |
| CN104536404A (en) * | 2014-12-17 | 2015-04-22 | 马钢(集团)控股有限公司 | Automatic load regulation system and method for dry quenching waste heat power generation |
| CN107154645A (en) * | 2017-05-31 | 2017-09-12 | 河北冀研能源科学技术研究院有限公司 | Method for enabling residual pressure waste heat generator set to participate in AGC (automatic gain control) adjustment of power plant |
| CN107154645B (en) * | 2017-05-31 | 2020-09-18 | 河北冀研能源科学技术研究院有限公司 | Method for enabling residual pressure waste heat generator set to participate in AGC (automatic gain control) adjustment of power plant |
| CN107370156A (en) * | 2017-08-24 | 2017-11-21 | 赫普科技发展（北京）有限公司 | A kind of power grid frequency modulation system based on electrode boiler |
| CN107842909A (en) * | 2017-10-13 | 2018-03-27 | 滕州富源低热值燃料热电有限公司 | A kind of system for expanding cogeneration of heat and power central heating scale |
| CN109901386A (en) * | 2017-12-11 | 2019-06-18 | 国电科学技术研究院 | A kind of thermoelectricity unit combination control method and system |
| CN109901386B (en) * | 2017-12-11 | 2022-06-14 | 国电科学技术研究院 | Combined control method and system for thermoelectric unit |
| CN108153256A (en) * | 2017-12-15 | 2018-06-12 | 青岛华丰伟业电力科技工程有限公司 | A kind of multicomputer gas-steam combined cycle power plant duty control method |
| CN108153256B (en) * | 2017-12-15 | 2020-03-20 | 青岛华丰伟业电力科技工程有限公司 | Multi-unit gas and steam combined cycle power station load control method |
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Application publication date: 20130306 |