CN104852402A - System and method for adjusting unit feedforward quantity - Google Patents
System and method for adjusting unit feedforward quantity Download PDFInfo
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- CN104852402A CN104852402A CN201510142682.4A CN201510142682A CN104852402A CN 104852402 A CN104852402 A CN 104852402A CN 201510142682 A CN201510142682 A CN 201510142682A CN 104852402 A CN104852402 A CN 104852402A
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Abstract
The invention discloses a system and method for adjusting a unit feedforward quantity. The method includes: a preset load is differentiated; the differentiated preset load is multiplied by a power deviation factor, and a feedforward quantity of a unit is adjusted according to actual power of the unit; and the power of the preset load is preset power required by a power grid. The method multiplies the differentiated preset load by the power deviation factor, and adjusts the feedforward quantity of the unit according to actual power of the unit, designs a steam turbine feedforward soft landing logic to enable the feedforward amount to be flexible, the feedforward quantity is changed with a load variation, and the load rapidly and stably follows an instruction to change.
Description
Technical field
The invention belongs to power grid control technical field, be specifically related to a kind of regulating system and method for unit feedforward amount.
Background technology
In pool, automatic generation control (AGC) requires that power plants generating electricity unit carries out fast electrical network AGC instruction, stationary response, controls to maintain system frequency for rated value the numerical value that the exchange power on this area and other interval interconnections specifies for agreement simultaneously.
In order to allow unit fast and stationary response dispatching of power netwoks AGC instruction, each power plant generally increases the feedforward of steam turbine pitch in logical design, allows steam turbine pitch with load instruction change response fast.Current each power plant steam turbine pitch adopts fixing feedforward, because load variations amount is indefinite, so use fixing feedforward amount easily to cause load overshoot or concussion, is difficult to stablize.
Summary of the invention
For defect of the prior art, the invention provides a kind of regulating system and method for unit feedforward amount, the method design steam turbine feedforward soft landing logic, to make feedforward amount " work ", changes feedforward amount size with load variations amount size, makes load fast and stable follow instruction change.
First aspect, the invention provides a kind of control method of unit feedforward amount, comprising:
Differential is carried out to default load;
By the default load after differential and power deviation multiplication, regulate according to the real feedforward amount of power to unit of sending out of unit;
Wherein, the predetermined power of described default load needed for electrical network.
Optionally, the predetermined power of described power deviation coefficient needed for electrical network and described reality send out the difference coefficient of power.
Optionally, describedly to regulate according to the real feedforward amount of power to unit of sending out of unit, comprising:
Described feedforward amount changes with power deviation size.
Optionally, described feedforward amount changes with power deviation size, comprising:
Described power deviation is larger, and described feedforward amount is larger; Described power deviation is less, and described feedforward amount is less.
Optionally, described feedforward amount is larger, and the porthole aperture of described unit is larger; Described feedforward amount is less, and the porthole aperture of described unit is less.
Second aspect, present invention also offers a kind of regulating system of unit feedforward amount, described system comprises:
Differential module, for carrying out differential to default load;
Adjustment module, for by the default load after differential and power deviation multiplication, regulates according to the real feedforward amount of power to unit of sending out of unit;
Wherein, the predetermined power of described default load needed for electrical network.
Optionally, the predetermined power of described power deviation coefficient needed for electrical network and described reality send out the difference coefficient of power.
Optionally, described adjustment module, specifically for:
Described feedforward amount changes with power deviation size.
Optionally, described adjustment module, specifically for:
Described power deviation is larger, and described feedforward amount is larger; Described power deviation is less, and described feedforward amount is less.
Optionally, described feedforward amount is larger, and the porthole aperture of described unit is larger; Described feedforward amount is less, and the porthole aperture of described unit is less.
As shown from the above technical solution, the regulating system of a kind of unit feedforward amount provided by the invention and method, the method is by the default load after differential and power deviation multiplication, regulate according to the real feedforward amount of power to unit of sending out of unit, design steam turbine feedforward soft landing logic is to make feedforward amount " work ", change feedforward amount size with load variations amount size, make load fast and stable follow instruction change.
In specification of the present invention, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme, it all should be encompassed in the middle of the scope of claim of the present invention and specification.
Accompanying drawing explanation
The schematic flow sheet of the control method of a kind of unit feedforward amount that Fig. 1 provides for one embodiment of the invention;
The structural representation of the regulating system of a kind of unit feedforward amount that Fig. 2 provides for one embodiment of the invention;
The structural representation of the regulating system of a kind of unit feedforward amount that Fig. 3 provides for another embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Fig. 1 shows the schematic flow sheet of the control method of a kind of unit feedforward amount that the embodiment of the present invention provides, and as shown in Figure 1, the method comprises the steps:
101, differential is carried out to default load;
102, by the default load after differential and power deviation multiplication, regulate according to the real feedforward amount of power to unit of sending out of unit;
Wherein, the predetermined power of described default load needed for electrical network.
The predetermined power of above-mentioned power deviation coefficient needed for electrical network and described reality send out the difference coefficient of power.
In above-mentioned steps 102, describedly to regulate according to the real feedforward amount of power to unit of sending out of unit, comprising:
Described feedforward amount changes with power deviation size.
Wherein, described feedforward amount changes with power deviation size, comprising:
Described power deviation is larger, and described feedforward amount is larger; Described power deviation is less, and described feedforward amount is less.
As shown in table 1 is the corresponding relation of power deviation and power deviation coefficient:
Table 1
| Power deviation | Power deviation coefficient |
| -220 | 1 |
| -2 | 1 |
| -1 | 0.5 |
| 0 | 0 |
| 1 | 0.5 |
| 2 | 1 |
| 220 | 1 |
Concrete, described feedforward amount is larger, and the porthole aperture of described unit is larger; Described feedforward amount is less, and the porthole aperture of described unit is less.
As shown in Figure 2, wherein as figure is multiplied by power deviation (actual load instruction and the real difference sending out power) coefficient on the basis that 2. original actual load instruction differential feedovers, when power deviation is larger, feedforward amount is large, real power of sending out reduces gradually close to feedforward amount during load instruction, reach the object of " soft landing ", prevent power toning.
Namely 1. 2. original feedforward be multiplied with picture frame and make feedforward reach soft landing effect, when slowing down gradually close to feedforward during desired value.
Fig. 3 shows the structural representation of the regulating system of a kind of unit feedforward amount that the embodiment of the present invention provides, and as shown in Figure 3, described system comprises: differential module 31 and adjustment module 32.
Differential module 31, for carrying out differential to default load;
Adjustment module 32, for by the default load after differential and power deviation multiplication, regulates according to the real feedforward amount of power to unit of sending out of unit;
Wherein, the predetermined power of described default load needed for electrical network.
The predetermined power of described power deviation coefficient needed for electrical network and described reality send out the difference coefficient of power.
Described adjustment module, specifically for:
Described feedforward amount changes with power deviation size.
Described adjustment module, specifically for:
Described power deviation is larger, and described feedforward amount is larger; Described power deviation is less, and described feedforward amount is less.
Concrete, described feedforward amount is larger, and the porthole aperture of described unit is larger; Described feedforward amount is less, and the porthole aperture of described unit is less.
Claims (10)
1. a control method for unit feedforward amount, is characterized in that, comprising:
Differential is carried out to default load;
By the default load after differential and power deviation multiplication, regulate according to the real feedforward amount of power to unit of sending out of unit;
Wherein, the predetermined power of described default load needed for electrical network.
2. method according to claim 1, is characterized in that, the predetermined power of described power deviation coefficient needed for electrical network and described reality send out the difference coefficient of power.
3. method according to claim 1, is characterized in that, describedly regulates according to the real feedforward amount of power to unit of sending out of unit, comprising:
Described feedforward amount changes with power deviation size.
4. method according to claim 3, is characterized in that, described feedforward amount changes with power deviation size, comprising:
Described power deviation is larger, and described feedforward amount is larger; Described power deviation is less, and described feedforward amount is less.
5. method according to claim 4, is characterized in that, described feedforward amount is larger, and the porthole aperture of described unit is larger; Described feedforward amount is less, and the porthole aperture of described unit is less.
6. a regulating system for unit feedforward amount, is characterized in that, described system comprises:
Differential module, for carrying out differential to default load;
Adjustment module, for by the default load after differential and power deviation multiplication, regulates according to the real feedforward amount of power to unit of sending out of unit;
Wherein, the predetermined power of described default load needed for electrical network.
7. system according to claim 6, is characterized in that, the predetermined power of described power deviation coefficient needed for electrical network and described reality send out the difference coefficient of power.
8. system according to claim 6, is characterized in that, described adjustment module, specifically for:
Described feedforward amount changes with power deviation size.
9. system according to claim 8, is characterized in that, described adjustment module, specifically for:
Described power deviation is larger, and described feedforward amount is larger; Described power deviation is less, and described feedforward amount is less.
10. system according to claim 9, is characterized in that, described feedforward amount is larger, and the porthole aperture of described unit is larger; Described feedforward amount is less, and the porthole aperture of described unit is less.
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| CN201510142682.4A CN104852402B (en) | 2015-03-27 | 2015-03-27 | A kind of regulating system and method for unit feedforward amount |
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| CN201510142682.4A CN104852402B (en) | 2015-03-27 | 2015-03-27 | A kind of regulating system and method for unit feedforward amount |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110513158A (en) * | 2019-09-04 | 2019-11-29 | 黑龙江苑博信息技术有限公司 | The Multirate adjusting method of steam turbine feedforward |
| CN113446073A (en) * | 2021-08-11 | 2021-09-28 | 内蒙古京隆发电有限责任公司 | Fault diagnosis method for high-pressure adjusting valve of steam turbine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110513158A (en) * | 2019-09-04 | 2019-11-29 | 黑龙江苑博信息技术有限公司 | The Multirate adjusting method of steam turbine feedforward |
| CN113446073A (en) * | 2021-08-11 | 2021-09-28 | 内蒙古京隆发电有限责任公司 | Fault diagnosis method for high-pressure adjusting valve of steam turbine |
| CN113446073B (en) * | 2021-08-11 | 2023-03-24 | 内蒙古京隆发电有限责任公司 | Fault diagnosis method for high-pressure adjusting valve of steam turbine |
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Inventor after: Wang Bin Inventor after: Li Gang Inventor after: Liang Guojie Inventor after: Mu Fengku Inventor after: Wang Lanzhong Inventor after: Cheng Gang Inventor before: Wang Lanzhong Inventor before: Wang Bin Inventor before: Mu Fengku |
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Effective date of registration: 20180411 Address after: 072750 Zhuozhou City, Hebei Province, East Xian Po Town Applicant after: HEBEI ZHUOZHOU JINGYUAN THERMAL ELECTRICITY CO., LTD. Address before: 100041 Guangning Road, Shijingshan District, Shijingshan District, Beijing Applicant before: SHIJINGSHAN THERMOELETRIC PLANT, BEIJING JINGNENG POWER CO., LTD. |
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Effective date of registration: 20200805 Address after: 072750, Baoding, Hebei province Zhuozhou City East cents slope town Co-patentee after: Beijing Jingneng Electric Power Co.,Ltd. Patentee after: HEBEI ZHUOZHOU JINGYUAN THERMAL ELECTRICITY Co.,Ltd. Address before: 072750 Zhuozhou City, Hebei Province, East Xian Po Town Patentee before: HEBEI ZHUOZHOU JINGYUAN THERMAL ELECTRICITY Co.,Ltd. |
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