CN105226700A - Based on primary frequency modulation control method and the device of valve flow characteristic dynamic conditioning - Google Patents
Based on primary frequency modulation control method and the device of valve flow characteristic dynamic conditioning Download PDFInfo
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- CN105226700A CN105226700A CN201410255115.5A CN201410255115A CN105226700A CN 105226700 A CN105226700 A CN 105226700A CN 201410255115 A CN201410255115 A CN 201410255115A CN 105226700 A CN105226700 A CN 105226700A
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- 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
- H02J3/241—The oscillation concerning frequency
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Abstract
The invention discloses a kind of primary frequency modulation control method based on valve flow characteristic dynamic conditioning and device, said method comprising the steps of: the feedback message that periodic receipt valve control system sends; According to the characteristic states of the valve opening amount determination valve flow in feedback message; When fluctuation occurs mains frequency, the characteristic states according to valve flow sends frequency modulation instruction, indicator valve accelerator control system control valve open amount; Achieve when fluctuation occurs mains frequency, choose suitable rate mu-factor according to valve flow characteristic, thus have adjusted valve flow, and then meet the demand of electrical network.
Description
Technical field
The invention relates to the control method of generating set primary frequency regulation, particularly relate to a kind of primary frequency modulation control method based on valve flow characteristic dynamic conditioning and device.
Background technology
Along with the increase of net capacity, grid stability is more and more taken seriously.Primary frequency function is the generating set function that the timely Spontaneous Participation stabilization of power grids regulates when fluctuation occurs mains frequency that is incorporated into the power networks, prior to frequency modulation frequency modulation (middle tune instruction), the minor fluctuations also timely correct feedback grid of electrical network can be reacted in time, there is the response time short, the advantage be swift in motion is that guarantee electrical network and generating set are safe, efficient, the critical function of stable operation.And due to the whether fine or not safe and stable operation directly having influence on electrical network of input of the unit primary frequency function that is incorporated into the power networks, electrical network increases the examination dynamics to generating set primary frequency regulation ability in recent years.
Although existing generating set substantially all possesses the function of primary frequency modulation, its fm capacity is not fully up to expectations.Current primary frequency modulation control program, before frequency modulation instruction is issued to Valve controlling, can suitably add a rate mu-factor as required.
But for the increase of rate mu-factor, when coefficient is too large, the excessive instability easily causing generating set to run of frequency modulation amount, when coefficient is too little, frequency modulation amount is too small again, thus can not meet the requirement of electrical network.And unit discharge characteristic of valve in running be not one complete linear, especially along under valve operational mode.Non-linear due to valve flow characteristic, cause under the valve position had, the proportionality coefficient added is suitable, and under the valve position had, the proportionality coefficient added just can not meet the demands.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of primary frequency modulation control method based on valve flow characteristic dynamic conditioning and device, achieve when fluctuation occurs mains frequency, suitable rate mu-factor is chosen according to valve flow characteristic, thus have adjusted valve flow, and then meet the demand of electrical network.
In order to achieve the above object, embodiments provide a kind of primary frequency modulation control method based on valve flow characteristic dynamic conditioning, said method comprising the steps of:
The feedback message that periodic receipt valve control system sends;
According to the characteristic states of the valve opening amount determination valve flow in feedback message;
When there is fluctuation in mains frequency,
Characteristic states according to valve flow sends frequency modulation instruction, indicator valve accelerator control system control valve open amount.
Preferably, the characteristic states of described valve flow specifically comprises linear condition and nonlinear state.
Preferably, when the characteristic states of described valve flow is linear condition, sends and carry the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A1.
Preferably, when the characteristic states of described valve flow is nonlinear state, sends and carry the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A2.
The embodiment of the invention also discloses a kind of primary frequency modulation control device based on valve flow characteristic dynamic conditioning, described device comprises:
Receiver module, for the feedback message that periodic receipt valve control system sends;
Determination module, for the characteristic states according to the valve opening amount determination valve flow in feedback message;
Sending module, for when fluctuation occurs mains frequency, the characteristic states according to valve flow sends frequency modulation instruction.
Preferably, the characteristic states of described valve flow specifically comprises linear condition and nonlinear state.
Preferably,
Described sending module, specifically for when the characteristic states of described valve flow is linear condition, sends and carries the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A1.
Preferably,
Described sending module, specifically for when the characteristic states of described valve flow is nonlinear state, sends and carries the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A2.
Prior art is compared, and the technical scheme that the embodiment of the present invention proposes has the following advantages:
The above embodiment of the present invention, achieves when fluctuation occurs mains frequency, chooses suitable rate mu-factor, thus have adjusted valve flow, and then meet the demand of electrical network according to valve flow characteristic.
Accompanying drawing explanation
Fig. 1 is the logical construction schematic diagram that the embodiment of the present invention provides;
Fig. 2 is the schematic flow sheet of the control of the primary frequency modulation based on valve flow characteristic dynamic conditioning that the embodiment of the present invention provides;
Fig. 3 is the device schematic diagram of the control of the primary frequency modulation based on valve flow characteristic dynamic conditioning that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, be clearly and completely described the technical scheme in the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, be logical construction schematic diagram of the present invention.In this schematic diagram, comprise the Δ f frequency difference module that fluctuation occurs mains frequency, control system static characteristic function F (X) module, for the Analog input mModule of export ratio amplification coefficient A1, A2, handover module T, valve control system module and valve command output module; Frequency difference module is connected with the input of control system static characteristic function F (X) module, the output of control system static characteristic function module is connected with the input of 2 Analog input mModule respectively, coefficient is that the Analog input mModule of A1 is connected with the first input end of handover module, coefficient is that the Analog input mModule of A2 is connected with the second input of handover module, the output of handover module and valve command model calling.
See Fig. 2, be the schematic flow sheet of the control of the primary frequency modulation based on valve flow characteristic dynamic conditioning that the embodiment of the present invention provides, this flow process can comprise:
Step 201, the feedback message that periodic receipt valve control system sends.
Concrete, the feedback message of the regular receiving valve accelerator control system transmission of control system of the generating set that is incorporated into the power networks, informs the open amount of the control system current valve of the generating set that is incorporated into the power networks, as current valve opens 50% by this feedback message.Wherein, this periodicity can refer to every 100ms and send a feedback message.
Step 202, according to the characteristic states of the valve opening amount determination valve flow in feedback message.
Concrete, be incorporated into the power networks the control system of generating set according to the characteristic states of the valve opening amount determination valve flow carried in the feedback message received, for specifically according to the mode of the characteristic states of valve opening amount determination valve flow, owing to being mode general in prior art, therefore no longer do concrete elaboration at this.
In this step, the characteristic states of valve flow specifically comprises linear condition and nonlinear state.
Step 203, the characteristic states according to valve flow sends frequency modulation instruction, indicator valve accelerator control system control valve open amount.
In this step, when fluctuation occurs mains frequency, the control system of the generating set that is incorporated into the power networks carries out issuing of frequency modulation instruction according to the characteristic states of valve flow.Concrete, when the control system determination valve flow of the generating set that is incorporated into the power networks is in linear condition, choose rate mu-factor A1, the frequency modulation amount of carrying this coefficient A1 is added in frequency modulation instruction, send to valve control system, indicator valve accelerator control system reasonably increases corresponding valve opening amount or reduces to regulate.
Further, after the frequency modulation instruction sending this carry over factor A1, due to the feedback message that meeting cycle receiving valve accelerator control system sends, when the feedback message received according to this determines that the flow of this valve is in nonlinear state, the frequency modulation instruction that the control system change of being incorporated into the power networks generating set sends, choose rate mu-factor A2, in this frequency modulation instruction, add the frequency modulation amount of carry over factor A2, to adapt to the reasonable output of valve for mains frequency.
Further, when the generating set that is incorporated into the power networks control system according to the current opening amount of the feedback message determination valve be currently received meet transmission electricity frequently measure time, namely current valve open amount just in time reasonably can transmit electricity amount frequently, and the control system of the generating set that is incorporated into the power networks no longer needs to send frequency modulation instruction to valve control system.
In the present embodiment, achieve when fluctuation occurs mains frequency, choose suitable rate mu-factor according to valve flow characteristic, thus have adjusted valve flow, and then meet the demand of electrical network.
Based on the design identical with said method, the embodiment of the present invention additionally provides a kind of primary frequency modulation control device based on valve flow characteristic dynamic conditioning, as shown in Figure 3, comprising:
Receiver module 31, for the feedback message that periodic receipt valve control system sends;
Determination module 32, for the characteristic states according to the valve opening amount determination valve flow in feedback message;
The characteristic states of described valve flow specifically comprises linear condition and nonlinear state.
Sending module 33, for when fluctuation occurs mains frequency, the characteristic states according to valve flow sends frequency modulation instruction; Specifically for when the characteristic states of described valve flow is linear condition, sends and carry the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A1; Specifically for when the characteristic states of described valve flow is nonlinear state, sends and carry the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A2.
In the present embodiment, achieve when fluctuation occurs mains frequency, choose suitable rate mu-factor according to valve flow characteristic, thus have adjusted valve flow, and then meet the demand of electrical network.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (8)
1., based on a primary frequency modulation control method for valve flow characteristic dynamic conditioning, it is characterized in that, said method comprising the steps of:
The feedback message that periodic receipt valve control system sends;
According to the characteristic states of the valve opening amount determination valve flow in feedback message;
When there is fluctuation in mains frequency,
Characteristic states according to valve flow sends frequency modulation instruction, indicator valve accelerator control system control valve open amount.
2. the method for claim 1, is characterized in that, the characteristic states of described valve flow specifically comprises linear condition and nonlinear state.
3. method as claimed in claim 2, is characterized in that, when the characteristic states of described valve flow is linear condition, sends and carries the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A1.
4. method as claimed in claim 2, is characterized in that, when the characteristic states of described valve flow is nonlinear state, sends and carries the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A2.
5., based on a primary frequency modulation control device for valve flow characteristic dynamic conditioning, it is characterized in that, comprising:
Receiver module, for the feedback message that periodic receipt valve control system sends;
Determination module, for the characteristic states according to the valve opening amount determination valve flow in feedback message;
Sending module, for when fluctuation occurs mains frequency, the characteristic states according to valve flow sends frequency modulation instruction.
6. device as claimed in claim 5, it is characterized in that, the characteristic states of described valve flow specifically comprises linear condition and nonlinear state.
7. device as claimed in claim 6, is characterized in that,
Described sending module, specifically for when the characteristic states of described valve flow is linear condition, sends and carries the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A1.
8. device as claimed in claim 7, is characterized in that,
Described sending module, specifically for when the characteristic states of described valve flow is nonlinear state, sends and carries the frequency modulation instruction that rate mu-factor is the frequency modulation amount of A2.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410255115.5A CN105226700B (en) | 2014-06-10 | 2014-06-10 | Primary frequency modulation control method and device based on valve flow characteristic dynamic adjustment |
| PCT/CN2014/001057 WO2015188293A1 (en) | 2014-06-10 | 2014-11-27 | Primary frequency modulation control method and apparatus for dynamic adjustment based on characteristic of valve flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410255115.5A CN105226700B (en) | 2014-06-10 | 2014-06-10 | Primary frequency modulation control method and device based on valve flow characteristic dynamic adjustment |
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| CN105226700A true CN105226700A (en) | 2016-01-06 |
| CN105226700B CN105226700B (en) | 2018-03-02 |
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| CN201410255115.5A Active CN105226700B (en) | 2014-06-10 | 2014-06-10 | Primary frequency modulation control method and device based on valve flow characteristic dynamic adjustment |
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| WO (1) | WO2015188293A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208852A (en) * | 2016-07-08 | 2016-12-07 | 云南电力试验研究院(集团)有限公司 | A kind of fired power generating unit primary frequency modulation spare capacity control strategy optimization method |
| CN107589706A (en) * | 2017-08-10 | 2018-01-16 | 国家电网公司 | A kind of fired power generating unit relates to net performance on-line monitoring method and device |
| CN109378850A (en) * | 2018-11-19 | 2019-02-22 | 四川省电力工业调整试验所 | A kind of primary frequency modulation optimization method under sequence valve control mode |
| CN111130096A (en) * | 2019-12-06 | 2020-05-08 | 国网天津市电力公司电力科学研究院 | Parameter calculation-based generator set primary frequency modulation performance evaluation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113219242B (en) * | 2021-03-26 | 2024-03-12 | 大唐三门峡发电有限责任公司 | Primary frequency modulation test method under millions of units rated load working conditions |
| CN114069654B (en) * | 2021-11-10 | 2023-09-08 | 国网山东省电力公司电力科学研究院 | Primary frequency modulation method and system for thermal power generating unit |
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| CN102611124A (en) * | 2012-03-10 | 2012-07-25 | 山东电力研究院 | Primary frequency regulation control method applicable to thermal generator set of intelligent power grid |
| US20140145452A1 (en) * | 2012-04-20 | 2014-05-29 | North China Electric Power Research Institute Co. Ltd. | Method and device for primary frequency regulation based on bang-bang control |
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- 2014-06-10 CN CN201410255115.5A patent/CN105226700B/en active Active
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208852A (en) * | 2016-07-08 | 2016-12-07 | 云南电力试验研究院(集团)有限公司 | A kind of fired power generating unit primary frequency modulation spare capacity control strategy optimization method |
| CN106208852B (en) * | 2016-07-08 | 2018-08-10 | 云南电力试验研究院(集团)有限公司 | A kind of fired power generating unit primary frequency modulation spare capacity control strategy optimization method |
| CN107589706A (en) * | 2017-08-10 | 2018-01-16 | 国家电网公司 | A kind of fired power generating unit relates to net performance on-line monitoring method and device |
| CN109378850A (en) * | 2018-11-19 | 2019-02-22 | 四川省电力工业调整试验所 | A kind of primary frequency modulation optimization method under sequence valve control mode |
| CN109378850B (en) * | 2018-11-19 | 2021-10-08 | 国网四川综合能源服务有限公司四川电力工程分公司 | Primary frequency modulation optimization method under sequence valve control mode |
| CN111130096A (en) * | 2019-12-06 | 2020-05-08 | 国网天津市电力公司电力科学研究院 | Parameter calculation-based generator set primary frequency modulation performance evaluation method |
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| Publication number | Publication date |
|---|---|
| WO2015188293A1 (en) | 2015-12-17 |
| CN105226700B (en) | 2018-03-02 |
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