CN108252276B - A kind of plant without storage's automatic optimization method adjusted based on power output - Google Patents
A kind of plant without storage's automatic optimization method adjusted based on power output Download PDFInfo
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- CN108252276B CN108252276B CN201810133948.2A CN201810133948A CN108252276B CN 108252276 B CN108252276 B CN 108252276B CN 201810133948 A CN201810133948 A CN 201810133948A CN 108252276 B CN108252276 B CN 108252276B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
A kind of plant without storage's automatic optimization method adjusted based on power output provided by the invention, for the plant without storage of 2 units, by to carrying out power output adjusting between unit, on the basis of guaranteeing that power station goes out dynamic balance, by adjusting, total water consumption rate in power station is reduced, the water consumption of reduction is averagely allocated to unit later, the increase for realizing unit output improves the on-road efficiency and water resource utilization efficiency in power station.
Description
Technical field
The present invention relates to power station optimizations, and in particular to a kind of Automatic Optimal side, plant without storage adjusted based on power output
Method.
Background technique
Important energy source component part of the waterpower resourses as China, with the irreplaceable superiority of other energy, rationally
Develop and using waterpower resourses be the good approach of the inevitable choice readjusted the energy structure and the Implement of sustainable development strategy.
As deepening continuously for research theory is constantly improve with scientific and technological level, the utilization efficiency of water resource is increased dramatically, especially
It is in large hydropower station, optimization operation and the research of scheduling theory reach its maturity, and pass through the actual motion mistake in power station
Implement Optimized Operation in journey, achieves preferable operational effect.Large hydropower station common engineering scale and installed capacity are larger, single
A power station proportion in power grid is larger, generally by power grid United Dispatching and allotment, therefore, attention degree, throwing in research
All comparatively sufficiently, research achievement is relatively more for the manpower and material resources entered, all opposite in terms of theoretical basis and practical application
Comparative maturity.And small hydropower station is for a long time, less input for attention degree, the research funding being subject to due to it, to miniature water
The research of the optimization operation in power station be also only limitted to it is some sporadicly and limited research, corresponding research achievement more zero
It dissipates, and is difficult to be applied in the actual motion in power station.
Data shows that power station is carried out optimization operation and compared with optimization operation is not carried out, and generated energy 2 usually can be improved
~10%, the ratio that small hydropower station increases generated energy wants some higher relatively, small hydropower station total installation of generating capacity and average annual power generation
Amount occupies larger specific gravity in HYDROELECTRIC ENERGY structure, and small power station is constrained by objective condition at present, and operational efficiency is generally lower.Cause
The basic theory for small hydropower station optimization operation is improved in the economical operation in this research power station, small-sized what is satisfied the requirements
Optimization operation is realized in power station as far as possible, increases the generated energy of water power, seriously polluted traditional energy is substituted with clean energy resource,
With significant ecological benefits and social benefit.
Plant without storage is the common form of small hydropower station, and shared large percentage, this in China power station
Power station does not often have regulation performance, is generated electricity using natural runoff.Due to lacking the management of science, often lead to
Power station is difficult to effectively be adjusted, to cannot achieve optimization operation.Especially once booting operation, does not often consider further that
Optimization, and due to the difference of unit assignment of traffic, there is also certain optimization spaces, this is for Rational Decision and improves water money
Source utilization efficiency plays a significant role.
Summary of the invention
The present invention is directed to problem of the prior art, provides a kind of Automatic Optimal side, plant without storage adjusted based on power output
Method.
The present invention provides a kind of plant without storage's automatic optimization method adjusted based on power output, and the plant without storage is extremely
Less include forebay, conduit pipe, turbine-generator units and governor, is provided with detection forebay on the forebay
The water-level gauge of water level, the governor are used to control the power output of turbine-generator units, and the number of units of the turbine-generator units is 2
Platform, number is No. 1 unit, No. 2 units respectively, and when 2, power station, unit is run simultaneously, and when the water level of the frontal pool is constant, power station
Power generation reference flow is equal to the practical incoming flow in power station, executes following optimization method at this time:
S1: increase the power output of No. 1 unit by the governor of No. 1 unit, and reduced out using the governor of No. 2 units
Power, the increased power output of No. 1 unit is equal with the power output that No. 2 units reduce, and utilizes water-level gauge detection pressure at this time
The water level of power forebay；
S2: the step S2 includes the following steps S21, S22, S23；
S21: if the water level for the forebay that step S1 is detected goes up, illustrate that power station reference flow is less than power station
Practical incoming flow, at this point, continue growing the power output of No. 1 unit by the governor of No. 1 unit, and utilize the speed regulation of No. 2 units
Device reduces power output, and the increased power output of No. 1 unit is equal with the power output that No. 2 units reduce, and executes adjustment until described
Forebay water level decreasing, at this time by No. 1 unit and No. 2 unit allocations the water level of the frontal pool decline it is corresponding it is upper once adjust go out
Force value；
S22: if the water level decreasing for the forebay that step S1 is detected, illustrate that power station reference flow is greater than power station
Practical incoming flow, at this point, reducing the power output of No. 1 unit by the governor of No. 1 unit, and increased using the governor of No. 2 units
Add power output, the power output that No. 1 unit reduces is equal with the increased power output of No. 2 units, if the water level of the frontal pool increases, executes
Adjustment until the forebay water level decreasing, at this time by No. 1 unit with No. 2 unit allocations on the water level of the frontal pool decline is corresponding
The power generating value once adjusted；
S23: it if the water level for the forebay that step S1 is detected is constant, does not continue to execute adjustment；
S3: after executing step S2, forebay water level increases, and obtains the increased water level of forebay, and utilize pressure
The water level storage-capacity curve of forebay calculates increased water value, forebay water level increased average time is obtained, before pressure
Pond increase carrys out water and obtains the average increase flow of forebay divided by the average time；
S4: by the average increase flow in step S3 according to being averagely allocated to No. 1 unit and No. 2 units calculate No. 1 units
With No. 2 increased power generating values of unit, No. 1 unit and No. 2 increased power generating values of unit are distributed to respectively by governor
No. 1 unit and No. 2 units, complete the optimal control in power station.
Preferably, the power generating value increasedd or decreased that No. 1 unit, No. 2 units adjust every time is identical.
Preferably, the power generating value increasedd or decreased that No. 1 unit, No. 2 units adjust every time is hydrogenerator
The 2% of group nominal output.
The present invention has the advantages that
A kind of plant without storage's automatic optimization method adjusted based on power output provided by the invention, for 2 units
Plant without storage, by the basis of guaranteeing that power station goes out dynamic balance, passing through tune to power output adjusting is carried out between unit
Section, reduces total water consumption rate in power station, the water consumption of reduction is averagely allocated to unit later, realize the increase of unit output,
Improve the on-road efficiency and water resource utilization efficiency in power station.
Specific embodiment: below to the present invention specifically illustrated, and to its theoretical basis and how
Operation is carried out in power station carries out necessary explanation.
The present invention provides a kind of plant without storage's automatic optimization method adjusted based on power output, and the plant without storage is extremely
Less include forebay, conduit pipe, turbine-generator units and governor, is provided with detection forebay on the forebay
The water-level gauge of water level, the governor are used to control the power output of turbine-generator units, and the number of units of the turbine-generator units is 2
Platform, number is No. 1 unit, No. 2 units respectively, and when 2, power station, unit is run simultaneously, and when the water level of the frontal pool is constant, power station
Power generation reference flow is equal to the practical incoming flow in power station, executes following optimization method at this time:
S1: increase the power output of No. 1 unit by the governor of No. 1 unit, and reduced out using the governor of No. 2 units
Power, the increased power output of No. 1 unit is equal with the power output that No. 2 units reduce, and utilizes water-level gauge detection pressure at this time
The water level of power forebay；
S2: the step S2 includes the following steps S21, S22, S23；
S21: if the water level for the forebay that step S1 is detected goes up, illustrate that power station reference flow is less than power station
Practical incoming flow, at this point, continue growing the power output of No. 1 unit by the governor of No. 1 unit, and utilize the speed regulation of No. 2 units
Device reduces power output, and the increased power output of No. 1 unit is equal with the power output that No. 2 units reduce, and executes adjustment until described
Forebay water level decreasing, at this time by No. 1 unit and No. 2 unit allocations the water level of the frontal pool decline it is corresponding it is upper once adjust go out
Force value；
S22: if the water level decreasing for the forebay that step S1 is detected, illustrate that power station reference flow is greater than power station
Practical incoming flow, at this point, reducing the power output of No. 1 unit by the governor of No. 1 unit, and increased using the governor of No. 2 units
Add power output, the power output that No. 1 unit reduces is equal with the increased power output of No. 2 units, if the water level of the frontal pool increases, executes
Adjustment until the forebay water level decreasing, at this time by No. 1 unit with No. 2 unit allocations on the water level of the frontal pool decline is corresponding
The power generating value once adjusted；
S23: it if the water level for the forebay that step S1 is detected is constant, does not continue to execute adjustment；
S3: after executing step S2, forebay water level increases, and obtains the increased water level of forebay, and utilize pressure
The water level storage-capacity curve of forebay calculates increased water value, forebay water level increased average time is obtained, before pressure
Pond increase carrys out water and obtains the average increase flow of forebay divided by the average time；
S4: by the average increase flow in step S3 according to being averagely allocated to No. 1 unit and No. 2 units calculate No. 1 units
With No. 2 increased power generating values of unit, No. 1 unit and No. 2 increased power generating values of unit are distributed to respectively by governor
No. 1 unit and No. 2 units, complete the optimal control in power station.
Preferably, the power generating value increasedd or decreased that No. 1 unit, No. 2 units adjust every time is identical.
Preferably, the power generating value increasedd or decreased that No. 1 unit, No. 2 units adjust every time is hydrogenerator
The 2% of group nominal output.
When wherein step S3 is realized, water-level gauge has clocking capability, when executing step S1, acquisition time point t1, and water level
H1, at the end of step S2, acquisition time point t2, water level h2 inquire the water level storage-capacity curve of the forebay, utilize water level
H1, h2 obtain storage capacity V1, the V2 of forebay, then averagely increasing flow described in step S3 is (V1-V2)/(t2-t1)
In step S4, it will averagely increase flow described in step S3 and be divided into 2 units, then according to forebay water
Position, the efficiency curve of the hydraulic turbine, tail water pool water level according to power station pipe arrangement form, generator efficiency etc. calculate step S1 it
Before preceding adjustment power output, then the corresponding reference flow of corresponding two units of power generating value utilizes the reference stream of two units
Amount plus it is described averagely increase flow divide equally flow rate calculation power output, and by the power output of be calculated No. 1 unit, No. 2 units
It is adjusted by governor；
Preferably, turbine-generator units have current surveying device, actually drawing for 2, power station unit is detected before step S1
With flow, step S2 obtains the practical reference flow of 2, power station unit later, then obtains the practical reduction stream in power station
Amount, is averagely allocated to 2 units for the reduction flow, utilizes forebay water level, the efficiency curve of the hydraulic turbine, tail water pool water level
Calculate the additional issue power output of two units according to power station pipe arrangement form, generator efficiency etc., and by be calculated No. 1 machine
Group, the power output of No. 2 units are adjusted by governor.
Theoretical basis of the invention are as follows:
Optimize operating energy loss in factory to have ignored usually in accordance with water turbine set and the theoretical characteristics of power station flow channels
The influence of error causes theoretical optimal case not to be consistent with actual motion.The error mainly has the constant error of machine unit characteristic, number
Choose error according to acquisition and parameter and calculate error etc..
For turbine-generator units, operating point is different, then the efficiency of the hydraulic turbine can differ larger, optimize in Hydroelectric Plant
When operation calculates, although each individual error can not be obtained accurately, each individual error forms comprehensive miss by transmitting, superposition
Difference.Composition error can not only make the actual efficiency curved surface of the hydraulic turbine in vertical direction deviation, relative to theoretical operating point, practical work
Condition point can also be subjected to displacement (i.e. the efficiency surface of the hydraulic turbine) in the horizontal direction.
Meanwhile when an only unit operation, even only operating point changes due to error, and the efficiency of the hydraulic turbine is bent
Face can also translate, and making actual efficiency value and theoretical efficiency value, there are deviations, eventually lead to theoretially optimum value not necessarily
Actual optimal value；Operation is simultaneously participated in for more units, power station participates in existing in the climatic conditioning main plot of operating unit
Theoretical curved surface, due to the presence of composition error when actual motion, the vertical and water of the overall efficiencies of more units in theoretical curved surface
Square to can also generate displacement, eventually leading to theoretical optimization result and actual motion, there are deviations, and this deviation is also larger sometimes.
The present invention proposes to establish based on the Automatic Optimal mechanism controlled of contributing, and unit is adjusted in real time when running, and realizes
The feedback closed loop of optimization controls, to reduce deviation existing for theoretical calculation and actual motion.Its basic thought is that it is flat to meet power output
Under the conditions of weighing apparatus, disturbance appropriate is given to the optimal operating condition point of unit theory scheme, faces at it and searches actual optimum operating condition in domain
Point (facing domain range can require to set according to available accuracy).
For 2 units, the gross capability of 2 units and the reference flow of 2 units have functional relation, to wherein
1 unit increases certain power output, reduces certain power output for another 1 unit, and gross capability is constant, but due to going out between unit
Power changes, and head loss, turbine efficiency also can therefore change, and at this moment inevitably results in unit reference stream quantitative change
Change, due to 2 units, optimal power output (i.e. maximum output) is that the monotonic function of wherein some unit reference flow is (another
Platform unit can subtract the flow of known unit with total flow), i.e., if adjustment direction is correct, the power output meeting one of 2 units
Directly be in monotonic relationshi, this be for those skilled in the art it is available, theoretical basis is power station optimum theory, error point
Analysis is theoretical and monotonic function is theoretical.
Illustrate if water consumption rate reduces there is also certain optimization space if executing primary adjustment, if water consumption rate increases
Add, then illustrate adjustment direction mistake, adjustment direction should be changed at this time, water consumption rate then reduces.
Optimal way provided by the invention can under monitoring and control of hydropower station platform automatic implementation, dynamic adjust, solve due to
Offset issue caused by theoretical characteristics and actual conditions are not inconsistent, be to the in-plant economical operation model based on power output control must
It supplements and corrects, further excavated power generation potentiality.
The above embodiment is only the preferred embodiment of the present invention, and protection scope of the present invention is not construed as only limiting
In the concrete form that embodiment is stated, protection scope of the present invention also includes that those skilled in the art conceive institute according to the present invention
It is conceivable that equivalent technologies mean.
Claims (3)
1. a kind of plant without storage's automatic optimization method adjusted based on power output, before which includes at least pressure
Pond, conduit pipe, turbine-generator units and governor are provided with the water level of detection forebay water level on the forebay
Meter, the governor are used to control the power output of turbine-generator units, and the number of units of the turbine-generator units is 2, number respectively
For No. 1 unit, No. 2 units, when 2, power station, unit is run simultaneously, and when the water level of the frontal pool is constant, and hydropower station quotes flow
Equal to the practical incoming flow in power station, following optimization method is executed at this time:
S1: increase the power output of No. 1 unit by the governor of No. 1 unit, and reduce power output, institute using the governor of No. 2 units
It is equal with the power output that No. 2 units reduce to state the increased power output of No. 1 unit, detects forebay using the water-level gauge at this time
Water level；
S2: the step S2 includes the following steps S21, S22, S23；
S21: if the water level for the forebay that step S1 is detected goes up, illustrate that power station reference flow is less than the reality in power station
Border incoming flow at this point, continuing growing the power output of No. 1 unit by the governor of No. 1 unit, and is subtracted using the governor of No. 2 units
Small power output, the increased power output of No. 1 unit is equal with the power output that No. 2 units reduce, and executes adjustment until the pressure
The water level of the frontal pool decline, declines the corresponding upper power output once adjusted in the water level of the frontal pool with No. 2 unit allocations for No. 1 unit at this time
Value；
S22: if the water level decreasing for the forebay that step S1 is detected, illustrate that power station reference flow is greater than the reality in power station
Border incoming flow at this point, reducing the power output of No. 1 unit by the governor of No. 1 unit, and is increased out using the governor of No. 2 units
Power, the power output that No. 1 unit reduces is equal with the increased power output of No. 2 units, if the water level of the frontal pool increases, executes adjustment
Until the forebay water level decreasing, corresponding primary in the water level of the frontal pool decline with No. 2 unit allocations by No. 1 unit at this time
The power generating value of adjustment；
S23: it if the water level for the forebay that step S1 is detected is constant, does not continue to execute adjustment；
S3: after executing step S2, forebay water level increases, and obtains the increased water level of forebay, and utilize forebay
Water level storage-capacity curve calculate increased water value, obtain forebay water level increased average time, increased using forebay
Calais's water obtains the average increase flow of forebay divided by the average time；
S4: by the average increase flow in step S3 according to No. 1 unit and No. 2 units is averagely allocated to, No. 1 unit and 2 are calculated
Number increased power generating value of unit is respectively distributed to No. 1 unit and No. 2 increased power generating values of unit by governor described
No. 1 unit and No. 2 units, complete the optimal control in power station.
2. a kind of plant without storage's automatic optimization method adjusted based on power output as described in claim 1, it is characterised in that:
The power generating value increasedd or decreased that No. 1 unit, No. 2 units adjust every time is identical.
3. a kind of plant without storage's automatic optimization method adjusted based on power output as described in claim 1, it is characterised in that:
The power generating value increasedd or decreased that No. 1 unit, No. 2 units adjust every time is the 2% of turbine-generator units nominal output.
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Families Citing this family (7)
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| CN111321713B (en) * | 2019-06-19 | 2021-05-11 | 河南郑大水利科技有限公司 | Hydropower station unit operation method based on ecological flow |
| CN110705784B (en) * | 2019-09-29 | 2023-04-07 | 河南郑大水利科技有限公司 | Optimized operation evaluation method for radial flow type hydropower station |
| CN111832830B (en) * | 2020-07-21 | 2022-12-16 | 河南郑大水利科技有限公司 | Tail water level-based big data optimization operation method for radial flow type hydropower station |
| CN111738625B (en) * | 2020-07-21 | 2024-02-20 | 河南郑大水利科技有限公司 | High water level operation method for front pool of radial hydropower station |
| CN111832829B (en) * | 2020-07-21 | 2023-06-02 | 黑龙江省水利水电集团有限公司 | Reservoir hydropower station optimal operation method based on big data |
| CN111738626B (en) * | 2020-07-22 | 2023-07-14 | 云南大唐国际李仙江流域水电开发有限公司 | Starting method and system for radial hydropower station |
| CN111859823B (en) * | 2020-07-22 | 2023-10-17 | 河南郑大水利科技有限公司 | Method and system for determining starting-up of radial hydropower station according to incoming flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1162697A (en) * | 1997-02-04 | 1997-10-22 | “列宁格勒金属工厂”股份公司 | Combined hydro-generators of hydroelectric stations |
| JP4649876B2 (en) * | 2004-05-31 | 2011-03-16 | 株式会社日立製作所 | Support method for hydropower plant operation management |
| CN103545817A (en) * | 2013-09-24 | 2014-01-29 | 许继集团有限公司 | Automatic power generation control method for cascade hydropower stations |
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2018
- 2018-02-09 CN CN201810133948.2A patent/CN108252276B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1162697A (en) * | 1997-02-04 | 1997-10-22 | “列宁格勒金属工厂”股份公司 | Combined hydro-generators of hydroelectric stations |
| JP4649876B2 (en) * | 2004-05-31 | 2011-03-16 | 株式会社日立製作所 | Support method for hydropower plant operation management |
| CN103545817A (en) * | 2013-09-24 | 2014-01-29 | 许继集团有限公司 | Automatic power generation control method for cascade hydropower stations |
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