CN102201677B - Power load cache system - Google Patents
Power load cache system Download PDFInfo
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- CN102201677B CN102201677B CN201010131043.5A CN201010131043A CN102201677B CN 102201677 B CN102201677 B CN 102201677B CN 201010131043 A CN201010131043 A CN 201010131043A CN 102201677 B CN102201677 B CN 102201677B
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Abstract
The invention provides a power load cache system, which comprises a load quantity acquisition device, a main controller, a power switchgear unit and a load cache unit, wherein the load quantity acquisition device is connected with a generator set, acquires the load quantity of the generator set and sends the load quantity to the main controller in real time; the main controller is connected with the load quantity acquisition device and compares the load quantity with a load quantity upper limit threshold and/or load quantity lower limit threshold, if the load quantity is greater than or equal to the load quantity upper limit threshold, a load decrease signal is sent to the load cache unit, and if the load quantity is less than or equal to the load quantity lower limit threshold, a load increase signal is sent to the load cache unit; the power switchgear unit is connected between the main controller and the load cache unit; and the load cache unit is connected with the power switchgear unit and the generator set, after receiving the load increase signal from the power switchgear unit, the load cache unit increases the load quantity of the generator set, and after receiving the load decrease signal from the power switchgear unit, the load cache unit decreases the load quantity of the generator set. Therefore, the generator set can be ensured in smooth running.
Description
Technical field
The present invention relates to the running technology of generating set, the power load cache system using while there is large electric load fluctuation in particular to being in operation for generating set.
Background technology
The steam turbine power generation unit of current lonely network operation, is increased by steam turbine load, need to increase fuel, and temperature rises and makes water vapor, becomes high steam acting, increases load, and these a series of processes can not complete in moment; And when load shedding, subtract fuel, same steam temperature and pressure can not reduce moment, make the load dynamic response characteristic of steam turbine poor, the voltage, frequency and the engine speed that cause steam turbine power generation unit are unstable, can follow the tracks of and change according to the variation of load, cause power supply poor quality, coefficient of safety be low.In moment large load change situation, load impacts very large to steam turbine, and long-time running meeting causes governor for steam turbine to damage, and even wash away steam turbine normal operating conditions, and exhaust is frequent, and noise is large, serious waste heat energy and water resources.
Therefore, exist the electric load buffer memory that can will fluctuate moment, alleviate or eliminate the demand of the dysgenic system that electric load fluctuation produces steam turbine.
Summary of the invention
To achieve these goals, the invention provides a kind of power load cache system, for realizing the electric load buffer memory to generating set, comprise: load harvester, be connected to described generating set, for gathering the load of described generating set, and described load is passed to described master controller in real time; Described master controller, be connected to described load harvester, described load and load upper limit threshold and/or load lower threshold are compared, if described load is more than or equal to described load upper limit threshold, send load and reduce signal to load buffer unit, if described load is less than or equal to described load lower threshold, sending load increases signal to described load buffer unit; Described power switch cabinet unit, be connected between described master controller and load buffer unit, for increase signal or described load according to the described load of described master controller, reduce signal and control described load buffer unit and increase or reduce the load of described generating set, and feed back signal to described master controller; Described load buffer unit, be connected to described power switch cabinet unit and described generating set, receiving that the described load from described power switch cabinet unit increases after signal, increase the load of described generating set, receiving that the described load from described power switch cabinet unit reduces after signal, reduces the load of described generating set.
In technique scheme, this power load cache system further comprises: frequency collection device, be connected to described generating set, for gathering the electric voltage frequency of described generating set, and described electric voltage frequency is passed to described master controller in real time, described master controller judges, if the described electric voltage frequency of described generating set is more than or equal to electric voltage frequency upper limit threshold, send load and increase signal to described load buffer unit, if the described electric voltage frequency of described generating set is less than or equal to electric voltage frequency lower threshold, send load and reduce signal to described load buffer unit, described load buffer unit is receiving that the described load from described master controller increases after signal, increase the load of described generating set, receiving that the described load from described master controller reduces after signal, reduce the load of described generating set.
In technique scheme, this power load cache system further comprises: gateway, is connected between described load harvester and described master controller, for the described load from described load harvester is passed to described master controller.
In technique scheme, described generating set is connected with step-up transformer unit, described step-up transformer unit is transferred to power consumer after processing for the voltage of described generating set output is boosted, described power load cache system also comprises step-down transformer unit, be connected between described step-up transformer unit and described power switch cabinet unit, for being transferred to described power switch cabinet unit after the voltage step-down of described step-up transformer unit output.
In technique scheme, described generating set is steam turbine power generation unit, hydraulic generator unit or wind wheel generation unit.
In technique scheme, described load buffer unit comprises a plurality of little load resistance casees, and the rated power of described little load resistance case is 50KW to 1000KW, is preferably 500KW.
In technique scheme, described load buffer unit sends the operating state of described load buffer unit to described master controller, and described master controller is controlled described load buffer unit according to described operating state.
In technique scheme, described power load cache system is in lonely Running State.
In technique scheme, further comprise industrial computer, be connected to described master controller, for monitoring operational factor and the status data of the described generating set that described master controller receives.
Pass through technique scheme, the electric load buffering device of the technical program design, can moment fluctuation electric load be transferred to the load buffer unit that comprises a plurality of little load resistance casees, and then it is added deduct on steam turbine slowly, to reach, dissolve the impact of large sudden load change to generating set, guarantee generating set even running.
Accompanying drawing explanation
Fig. 1 shows the block diagram according to power load cache system of the present invention;
Fig. 2 shows the work schematic diagram of power load cache system according to an embodiment of the invention.
Embodiment
Fig. 1 shows the block diagram according to power load cache system of the present invention.
As shown in Figure 1, the invention provides a kind of power load cache system 100, for realizing the electric load buffer memory to generating set 112, comprise: load harvester 102, be connected to described generating set 112, for gathering the load of described generating set 112, and described load is passed to described master controller 104 in real time; Described master controller 104, be connected to described load harvester 102, described load and load upper limit threshold and/or load lower threshold are compared, if described load is more than or equal to described load upper limit threshold, send load and reduce signal to load buffer unit 108, if described load is less than or equal to described load lower threshold, sending load increases signal to described load buffer unit 108; Power switch cabinet unit 106, be connected between described master controller 104 and load buffer unit 108, for increase signal or described load according to the described load of described master controller 104, reduce signal and control described load buffer unit 108 and increase or reduce the load of described generating set 112, and feed back signal to described master controller 104; Described load buffer unit 108, be connected to described master controller 104 and described generating set 112, receiving that the described load from described master controller 104 increases after signal, increase the load of described generating set 112, receiving that the described load from described master controller 104 reduces after signal, reduces the load of described generating set 112; Industrial computer 110, is connected to described master controller 104, for monitoring operational factor and the status data of the described generating set 112 that described master controller 104 receives.
In technique scheme, described power load cache system 100 further comprises: frequency collection device, be connected to described generating set 112, for gathering the electric voltage frequency of described generating set 112, and described electric voltage frequency is passed to described master controller 104 in real time, described master controller 104 judges, if the described electric voltage frequency of described generating set 112 is more than or equal to electric voltage frequency upper limit threshold, send load and increase signal to described load buffer unit 108, if the described electric voltage frequency of described generating set 112 is less than or equal to electric voltage frequency lower threshold, send load and reduce signal to described load buffer unit 108, described load buffer unit 108 is receiving that the described load from described master controller 104 increases after signal, increase the load of described generating set 112, receiving that the described load from described master controller 104 reduces after signal, reduce the load of described generating set 112.
In technique scheme, described power load cache system 100 further comprises: gateway, be connected between described load harvester 102 and described master controller 104, for the described load from described load harvester 102 is passed to described master controller 104.
In technique scheme, described generating set 112 is connected with step-up transformer unit, described step-up transformer unit is transferred to power consumer after processing for the voltage of described generating set 112 outputs is boosted, described power load cache system 100 also comprises step-down transformer unit, be connected between described step-up transformer unit and described power switch cabinet unit, for being transferred to described power switch cabinet unit after the voltage step-down of described step-up transformer unit output.
In technique scheme, described generating set 112 is steam turbine power generation unit 112, hydraulic generator unit 112 or wind wheel generation unit 112.
In technique scheme, described load buffer unit 108 comprises a plurality of little load resistance casees.The rated power of described little load resistance case, in the scope of 50KW to 1000KW, is preferably 500KW
In technique scheme, described load buffer unit 108 sends the operating state of described load buffer unit 108 to described master controller 104, and described master controller 104 is controlled described load buffer unit 108 according to described operating state.
In technique scheme, described power load cache system 100 is in lonely Running State.
Fig. 2 shows the work schematic diagram of power load cache system according to an embodiment of the invention.
This device is comprised of frequency collection device 200, load harvester 202, gateway 204, master controller 206, industrial computer 208, step-down transformer unit 210, load buffer unit (a plurality of little load resistance case) 212, power switch cabinet unit 214.Frequency collection device 200 is with the electric voltage frequency of high speed acquisition steam turbine power generation unit 216, in real time frequency is passed to master controller, load harvester 202 is passed to master controller 206 by the load Real-time Collection of steam turbine power generation unit 216 after gateway 204 conversion communications protocol simultaneously, master controller 206 is analyzed steam turbine power generation unit 216 operation conditionss according to real-time frequency and load, by specific control algolithm drive power switch cabinet unit 214, receive or discharge load to the load buffer unit 212 that comprises a plurality of little load resistance casees, to reach, electric load moment of sudden change is cached to load buffer unit 212, and then it is added deduct on steam turbine power generation unit 216 slowly.Thereby make steam turbine power generation unit 216 avoid the impact of large sudden load change, make the 216 safety and steady operations of steam turbine power generation unit.Industrial computer 208 is mainly used to monitor the working condition of master controller 206, power switch cabinet unit 214, load buffer unit 212, and the major parameter of steam turbine power generation unit 216 work is set.
By the description to embodiments of the invention by reference to the accompanying drawings above, can clearly understand, steam turbine power generation group is when lonely network operation, and maximum difficulty is can not be by the large load of moment sudden change, transient absorption digestion, this is poor the causing of dynamic load characteristic by turbo generator set.The present invention mainly adds the load of moment sudden change to reduce to the load buffer unit that comprises a plurality of little load resistance casees, then the load of load buffer unit is slowly added deduct on steam turbine, makes the even running of steam turbine power generation unit.We have designed electric load buffering device for this reason, can moment fluctuation electric load be applied to the load buffer unit that comprises a plurality of little load resistance casees, and then it is added slowly and is reduced on steam turbine, to reach, dissolve the impact of large sudden load change to steam turbine power generation unit, guarantee the even running of steam turbine power generation unit.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a power load cache system, for realizing the electric load buffer memory to generating set, is characterized in that, comprising:
Load harvester, is connected to described generating set, for gathering the load of described generating set, and described load is passed to master controller in real time;
Described master controller, be connected to described load harvester, described load and load upper limit threshold and/or load lower threshold are compared, if described load is more than or equal to described load upper limit threshold, send load and reduce signal to load buffer unit, if described load is less than or equal to described load lower threshold, sending load increases signal to described load buffer unit;
Power switch cabinet unit; be connected between described master controller and load buffer unit; for increase signal or described load according to the described load of described master controller, reduce signal and control described load buffer unit and increase or reduce the load of described generating set, and feed back signal to described master controller;
Described load buffer unit, be connected to described power switch cabinet unit and described generating set, receiving that the described load from described power switch cabinet unit increases after signal, increase the load of described generating set, receiving that the described load from described power switch cabinet unit reduces after signal, reduces the load of described generating set;
Gateway, is connected between described load harvester and described master controller, for the described load from described load harvester is passed to described master controller.
2. power load cache system according to claim 1, it is characterized in that, further comprise: frequency collection device, be connected to described generating set, for gathering the electric voltage frequency of described generating set, and described electric voltage frequency is passed to described master controller in real time, described master controller judges, if the described electric voltage frequency of described generating set is more than or equal to electric voltage frequency upper limit threshold, send load and increase signal to described load buffer unit, if the described electric voltage frequency of described generating set is less than or equal to electric voltage frequency lower threshold, send load and reduce signal to described load buffer unit, described load buffer unit is receiving that the described load from described master controller increases after signal, increase the load of described generating set, receiving that the described load from described master controller reduces after signal, reduce the load of described generating set.
3. power load cache system according to claim 1 and 2, it is characterized in that, described generating set is connected with step-up transformer unit, described step-up transformer unit is transferred to power consumer after processing for the voltage of described generating set output is boosted, described power load cache system also comprises step-down transformer unit, be connected between described step-up transformer unit and described power switch cabinet unit, for being transferred to described power switch cabinet unit after the voltage step-down of described step-up transformer unit output.
4. power load cache system according to claim 1 and 2, is characterized in that, described generating set is steam turbine power generation unit, hydraulic generator unit or wind wheel generation unit.
5. power load cache system according to claim 1 and 2, is characterized in that, described load buffer unit comprises a plurality of little load resistance casees, and the rated power of described little load resistance case is 50KW to 1000KW.
6. power load cache system according to claim 5, is characterized in that, the rated power of described little load resistance case is 500KW.
7. power load cache system according to claim 1 and 2, it is characterized in that, described load buffer unit sends the operating state of described load buffer unit to described master controller, and described master controller is controlled described load buffer unit according to described operating state.
8. power load cache system according to claim 1 and 2, is characterized in that, described power load cache system is in lonely Running State.
9. power load cache system according to claim 1 and 2, is characterized in that, further comprises industrial computer, is connected to described master controller, for monitoring operational factor and the status data of the described generating set that described master controller receives.
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| CN201010131043.5A CN102201677B (en) | 2010-03-22 | 2010-03-22 | Power load cache system |
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| CN103693645B (en) * | 2013-12-22 | 2015-04-15 | 石家庄新华能源环保科技股份有限公司 | Switch load system for isolated power system operation in calcium carbide plant |
| US10243371B2 (en) * | 2016-12-15 | 2019-03-26 | Caterpillar Inc. | System, apparatus, and method for controlling load sharing of generator sets |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201656497U (en) * | 2010-03-22 | 2010-11-24 | 张桂琴 | Electric load buffering device |
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| US6252753B1 (en) * | 1998-12-18 | 2001-06-26 | Southern California Edison Co. | Energy service stabilizer |
| US6858953B2 (en) * | 2002-12-20 | 2005-02-22 | Hawaiian Electric Company, Inc. | Power control interface between a wind farm and a power transmission system |
| US7489988B2 (en) * | 2003-11-19 | 2009-02-10 | Panasonic Corporation | Generator control system, generating apparatus control method, program and record medium |
| US20070100506A1 (en) * | 2005-10-31 | 2007-05-03 | Ralph Teichmann | System and method for controlling power flow of electric power generation system |
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| CN201656497U (en) * | 2010-03-22 | 2010-11-24 | 张桂琴 | Electric load buffering device |
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Commission number: 4W103884 Conclusion of examination: The patent shall remain valid on the basis of claims 1-8 filed by the patentee on January 29, 2016. Decision date of declaring invalidation: 20160505 Decision number of declaring invalidation: 28928 Denomination of invention: Power load cache system Granted publication date: 20140507 Patentee: Zhang Guiqin |
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