CN105226700B - Primary frequency modulation control method and device based on valve flow characteristic dynamic adjustment - Google Patents
Primary frequency modulation control method and device based on valve flow characteristic dynamic adjustment Download PDFInfo
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- CN105226700B CN105226700B CN201410255115.5A CN201410255115A CN105226700B CN 105226700 B CN105226700 B CN 105226700B CN 201410255115 A CN201410255115 A CN 201410255115A CN 105226700 B CN105226700 B CN 105226700B
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- frequency modulation
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- characteristic states
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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 and device based on valve flow characteristic dynamic adjustment, the described method comprises the following steps：The feedback message that periodic receipt valve control system is sent；Valve opening amount in feedback message determines the characteristic states of valve flow；When mains frequency fluctuates, frequency modulation instruction is sent according to the characteristic states of valve flow, indicates valve control system control valve open amount；Realize when mains frequency fluctuates, suitable rate mu-factor is chosen according to valve flow characteristic, so as to have adjusted valve flow, and then meet the demand of power network.
Description
Technical field
The invention relates to the control method of generating set primary frequency regulation, more particularly to one kind to be based on valve flow characteristic
The primary frequency modulation control method and device of dynamic adjustment.
Background technology
With the increase of net capacity, grid stability is increasingly taken seriously.Primary frequency function is generating of being incorporated into the power networks
The unit function that the spontaneous participation stabilization of power grids is adjusted in time when mains frequency fluctuates, prior to frequency modulation frequency modulation, (middle tune refers to
Make), the minor fluctuations of power network and timely correct feedback grid can be reacted in time, have the response time short, the advantages of being swift in motion,
It is to ensure power network and generating set is safe efficient, critical function of stable operation.And due to the unit primary frequency modulation work(that is incorporated into the power networks
The whether fine or not safe and stable operation for directly influencing power network of input of energy, power network increases in recent years adjusts to generating set primary
The examination dynamics of frequency ability.
Although existing generating set all possesses the function of primary frequency modulation substantially, its fm capacity is not fully up to expectations.Mesh
Preceding primary frequency modulation control program can suitably add a scaling system as needed before frequency modulation instruction is issued to Valve controlling
Number.
However, the increase for rate mu-factor, when coefficient is too big, frequency modulation amount is excessive to easily cause generating set fortune
Capable is unstable, and when coefficient is too small, frequency modulation amount is again too small, so as to can not meet the requirement of power network.And unit is in running
The discharge characteristic of middle valve is not one fairly linear, especially under along the valve method of operation.Due to valve flow characteristic
It is non-linear, cause under the valve position having, the proportionality coefficient of addition is suitable, and under the valve position having, and the proportionality coefficient of addition is just
It can not meet to require.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of primary frequency modulation control based on valve flow characteristic dynamic adjustment
Method and device, realize when mains frequency fluctuates, suitable scaling system is chosen according to valve flow characteristic
Number, so as to have adjusted valve flow, and then meets the demand of power network.
In order to achieve the above object, adjusted once based on valve flow characteristic dynamic the embodiments of the invention provide a kind of
Frequency modulation control method, the described method comprises the following steps：
The feedback message that periodic receipt valve control system is sent；
Valve opening amount in feedback message determines the characteristic states of valve flow；
When mains frequency fluctuates,
Frequency modulation instruction is sent according to the characteristic states of valve flow, indicates valve control system control valve open amount.
Preferably, the characteristic states of the valve flow specifically include linear condition and nonlinear state.
Preferably, when the characteristic states of the valve flow are linear condition, transmission carries rate mu-factor and is
The frequency modulation instruction of A1 frequency modulation amount.
Preferably, when the characteristic states of the valve flow are nonlinear state, transmission carries rate mu-factor
For the frequency modulation instruction of A2 frequency modulation amount.
The embodiment of the invention also discloses a kind of primary frequency modulation control device based on valve flow characteristic dynamic adjustment, institute
Stating device includes：
Receiving module, the feedback message sent for periodic receipt valve control system；
Determining module, the characteristic states of valve flow are determined for the valve opening amount in feedback message；
Sending module, for when mains frequency fluctuates, frequency modulation instruction to be sent according to the characteristic states of valve flow.
Preferably, the characteristic states of the valve flow specifically include linear condition and nonlinear state.
Preferably,
The sending module, specifically for when the characteristic states of the valve flow are linear condition, transmission carries
Rate mu-factor is the frequency modulation instruction of A1 frequency modulation amount.
Preferably,
The sending module, specifically for when the characteristic states of the valve flow are nonlinear state, sending and carrying
Proportional amplification coefficient is the frequency modulation instruction of A2 frequency modulation amount.
Prior art is compared, and the technical scheme that the embodiment of the present invention is proposed has advantages below：
The above embodiment of the present invention, realize when mains frequency fluctuates, chosen according to valve flow characteristic
Suitable rate mu-factor, so as to have adjusted valve flow, and then meet the demand of power network.
Brief description of the drawings
Fig. 1 is the logical construction schematic diagram that the embodiment of the present invention is provided；
Fig. 2 is the flow for the primary frequency modulation control based on valve flow characteristic dynamic adjustment that the embodiment of the present invention is provided
Schematic diagram；
Fig. 3 is the device for the primary frequency modulation control based on valve flow characteristic dynamic adjustment that the embodiment of the present invention is provided
Schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described, shown
So, described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
As shown in figure 1, the logical construction schematic diagram for the present invention.In the schematic diagram, including mains frequency fluctuates
Δ f frequency difference modules, control system static characteristic function F (X) module, the analog quantity for export ratio amplification coefficient A1, A2
Input module, handover module T, valve control system module and valve command output module；Frequency difference module and control system are quiet
The input connection of step response function F (X) module, the output end of control system static characteristic function module are simulated with 2 respectively
The input connection of input module is measured, the Analog input mModule and the first input end of handover module that coefficient is A1 connect, and are
Number connects for A2 Analog input mModule and the second input of handover module, output end and the valve command mould of handover module
Block connects.
Referring to Fig. 2, the primary frequency modulation based on valve flow characteristic dynamic adjustment provided by the embodiment of the present invention controls
Schematic flow sheet, the flow may include：
Step 201, the feedback message that periodic receipt valve control system is sent.
Specifically, the control system for the generating set that is incorporated into the power networks periodically receives the feedback message of valve control system transmission,
The open amount of the control system current valve for the generating set that is incorporated into the power networks is informed by the feedback message, as current valve is opened
50%.Wherein, this periodically also refers to every 100ms and sends a feedback message.
Step 202, the valve opening amount in feedback message determines the characteristic states of valve flow.
Specifically, the control system for the generating set that is incorporated into the power networks is according to the valve opening carried in the feedback message received
The characteristic states of amount determination valve flow, the mode of the characteristic states for determining valve flow with specific reference to valve opening amount,
By being mode general in the prior art, therefore no longer it is specifically described herein.
In this step, the characteristic states of valve flow specifically include linear condition and nonlinear state.
Step 203, frequency modulation instruction is sent according to the characteristic states of valve flow, instruction valve control system control valve is opened
Qi Liang.
In this step, when mains frequency fluctuates, the control system for the generating set that is incorporated into the power networks is according to valve stream
The characteristic states of amount carry out issuing for frequency modulation instruction.Specifically, when the control system for the generating set that is incorporated into the power networks determines valve stream
When amount is in linear condition, rate mu-factor A1 is chosen, the frequency modulation amount for carrying coefficient A1 is added in frequency modulation instruction, hair
Valve control system is given, instruction valve control system carries out reasonably increasing or reducing adjusting to corresponding valve opening amount.
Further, after the frequency modulation for having sent carry over factor A1 instructs, due to the cycle valve control system can be received
The feedback message of transmission, it is grid-connected when the feedback message received according to this determines that the flow of the valve is in nonlinear state
The control system for running generating set changes the frequency modulation instruction sent, chooses rate mu-factor A2, adds in frequency modulation instruction
Add carry over factor A2 frequency modulation amount, to adapt to reasonable output of the valve for mains frequency.
Further, when the control system for the generating set that is incorporated into the power networks determines valve according to the feedback message being currently received
Current opening amount when meeting transmission electricity frequency and measuring, i.e., current valve open amount just can reasonably transmit electric frequency and measure, grid-connected fortune
The control system of row generating set no longer needs to send frequency modulation instruction to valve control system.
In the present embodiment, realize when mains frequency fluctuates, suitable ratio is chosen according to valve flow characteristic
Example amplification coefficient, so as to have adjusted valve flow, and then meets the demand of power network.
Based on design same as mentioned above, the embodiment of the present invention additionally provides a kind of based on valve flow characteristic dynamic
The primary frequency modulation control device of adjustment, as shown in figure 3, including：
Receiving module 31, the feedback message sent for periodic receipt valve control system；
Determining module 32, the characteristic states of valve flow are determined for the valve opening amount in feedback message；
The characteristic states of the valve flow specifically include linear condition and nonlinear state.
Sending module 33, for when mains frequency fluctuates, sending frequency modulation according to the characteristic states of valve flow and referring to
Order；Rate mu-factor is carried as A1's specifically for when the characteristic states of the valve flow are linear condition, sending
The frequency modulation instruction of frequency modulation amount；Specifically for when the characteristic states of the valve flow are nonlinear state, transmission carries ratio
The frequency modulation instruction for the frequency modulation amount that example amplification coefficient is A2.
In the present embodiment, realize when mains frequency fluctuates, suitable ratio is chosen according to valve flow characteristic
Example amplification coefficient, so as to have adjusted valve flow, and then meets the demand of power network.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be by
Software adds the mode of required general hardware platform to realize, naturally it is also possible to which by hardware, but the former is more in many cases
Good embodiment.Based on such understanding, what technical scheme substantially contributed to prior art in other words
Part can be embodied in the form of software product, and the computer software product is stored in a storage medium, if including
It is dry to instruct to cause a computer equipment (be personal computer, server, or network equipment etc.) to perform this hair
Method described in bright each embodiment.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module or stream in accompanying drawing
Journey is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in embodiment can describe be divided according to embodiment
It is distributed in the device of embodiment, respective change can also be carried out and be disposed other than in one or more devices of the present embodiment.On
The module for stating embodiment can be merged into a module, can also be further split into multiple submodule.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
Disclosed above is only several specific embodiments of the present invention, and still, the present invention is not limited to this, any ability
What the technical staff in domain can think change should all fall into protection scope of the present invention.
Claims (2)
1. a kind of primary frequency modulation control method based on valve flow characteristic dynamic adjustment, it is characterised in that methods described includes
Following steps：
The feedback message that periodic receipt valve control system is sent；
Valve opening amount in feedback message determines the characteristic states of valve flow；
When mains frequency fluctuates,
Frequency modulation instruction is sent according to the characteristic states of valve flow, indicates valve control system control valve open amount；
The characteristic states of the valve flow specifically include linear condition and nonlinear state；
When the characteristic states of the valve flow are linear condition, send and carry rate mu-factor as A1 frequency modulation amount
Frequency modulation instructs；
When the characteristic states of the valve flow are nonlinear state, the frequency modulation amount for carrying that rate mu-factor is A2 is sent
Frequency modulation instruction.
A kind of 2. primary frequency modulation control device based on valve flow characteristic dynamic adjustment, it is characterised in that including：
Receiving module, the feedback message sent for periodic receipt valve control system；
Determining module, the characteristic states of valve flow are determined for the valve opening amount in feedback message；
Sending module, for when mains frequency fluctuates, frequency modulation instruction to be sent according to the characteristic states of valve flow；
The characteristic states of the valve flow specifically include linear condition and nonlinear state；
The sending module, specifically for when the characteristic states of the valve flow are linear condition, it is proportional to send carrying
Amplification coefficient is the frequency modulation instruction of A1 frequency modulation amount；
The sending module, specifically for when the characteristic states of the valve flow are nonlinear state, transmission carries ratio
The frequency modulation instruction for the frequency modulation amount that example amplification coefficient is 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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
|---|---|
| CN105226700A CN105226700A (en) | 2016-01-06 |
| CN105226700B true 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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| CN (1) | CN105226700B (en) |
| WO (1) | WO2015188293A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN111130096B (en) * | 2019-12-06 | 2023-07-28 | 国网天津市电力公司电力科学研究院 | Parameter calculation-based primary frequency modulation performance evaluation method for generator set |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN103378601B (en) * | 2012-04-20 | 2016-03-09 | 华北电力科学研究院有限责任公司 | A kind of primary frequency modulation method based on bang-bang control and device |
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- 2014-06-10 CN CN201410255115.5A patent/CN105226700B/en active Active
- 2014-11-27 WO PCT/CN2014/001057 patent/WO2015188293A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| 中调门流量特性曲线对DEH控制系统的影响分析;霍红岩等;《内蒙古电力技术》;20101128;第28卷(第S2期);第44-46页 * |
| 主汽压力及调门流量特性对机组一次调频的影响和改进;郭挺等;《内蒙古电力技术》;20120428;第30卷(第2期);第91-93页 * |
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| Publication number | Publication date |
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| CN105226700A (en) | 2016-01-06 |
| WO2015188293A1 (en) | 2015-12-17 |
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