CN206256936U - A kind of primary frequency modulation optimal control device drawn gas based on heat supply - Google Patents
A kind of primary frequency modulation optimal control device drawn gas based on heat supply Download PDFInfo
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- CN206256936U CN206256936U CN201621125998.9U CN201621125998U CN206256936U CN 206256936 U CN206256936 U CN 206256936U CN 201621125998 U CN201621125998 U CN 201621125998U CN 206256936 U CN206256936 U CN 206256936U
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Abstract
The utility model is related to a kind of primary frequency modulation optimal control device drawn gas based on heat supply, including the first signal picker and secondary signal collector, first signal picker, secondary signal collector are connected with a divider respectively, the divider is connected with a function sets module, and the function sets module is connected with the first multiplier；Also include one the 3rd signal picker, the 3rd signal picker is connected with first multiplier；Also include analog generator, the second multiplier and lower bound clipping module high, first multiplier is connected with lower bound clipping module high, the analog generator is connected with the ceiling value input of lower bound clipping module high, and second multiplier is connected with the low clip input of lower bound clipping module high.The utility model can effectively solve the problem that thermal power generation unit due to extraction for heat supply during steam flow is not enough and the primary frequency modulation action amplitude deficiency problem that causes.
Description
Technical field
The utility model is related to a kind of primary frequency modulation optimal control device drawn gas based on heat supply, belongs to thermal power generation unit
Frequency modulation technology field.
Background technology
It is mutual in extra-high voltage grid and large regional grid with the continuous increase of new-energy grid-connected, load growth and power network scale
Under the new situation, increasingly closely, the requirement of cooperation also more and more higher between power network and unit nets factory to grid contacts at different levels to connection
Primary frequency modulation in coordination function turns into stablizes one of effective means of power network.Generating set primary frequency regulation function is turbine generator
The intrinsic function of unit, mainly adjusts door by adjusting the vapour that enters of DEH systems, using boiler heat storage, occurs in power network abnormal
In the case of, the requirement of quick response power network, electric power grid frequency stabilization, to make up network load gap, maintains the safety of power network.
The response that Primary regulation changes to system frequency is fast, according to the statistics of IEEE, the comprehensive Primary regulation of power system
Characteristic time constant is general at 10 seconds or so.Different types of thermal power generation unit, due to the difference of amount of stored heat, Primary regulation
Action time is 0.5-2 minutes.The method of adjustment that the Primary regulation of generator is used is that have poor characteristic method, and its advantage is institute
There is the adjustment of unit only relevant (i.e. relevant with system frequency) with a parameter, interacted between unit small.At present, power network
Management and running derive from operation plan and EMS (EMS) to the primary frequency modulation performance examining computation parameter of unit.Machine
The measuring point information definition such as the corresponding frequency of group, active is determined in WAMS (wide-area monitoring systems) remote measurement defines table according in WAMS
Adopted telemetry intelligence (TELINT) obtained from PMU (synchronized phase measurement device) real-time database primary frequency modulation disturbance calculate frequency, it is active, turn
The telemetry such as instruction before and after speed, primary frequency modulation.
Current fired power generating unit generally possesses winter extraction for heat supply function, in the winter time during extraction for heat supply, due to having extracted portion
Dividing steam carries out heat supply, and this some vapor flow is just not converted to electric load, can slow down unit load rate of change, causes
Draw gas the primary frequency modulation acting ability reduction of period unit, the amplitude for causing unit frequency modulation to act is not enough, causes unit in scheduling
Index is affected and is examined in examination.
Utility model content
In order to solve the above problems, steam flow is not enough and cause during solving thermal power generation unit due to extraction for heat supply
Primary frequency modulation action amplitude deficiency problem, the utility model provides a kind of primary frequency modulation optimal control dress drawn gas based on heat supply
Put.
To achieve these goals, the utility model is adopted the following technical scheme that：
A kind of primary frequency modulation optimal control device drawn gas based on heat supply, including for gathering unit heat supply extraction flow
First signal picker and the secondary signal collector for gathering total steam flow, first signal picker, the second letter
Number collector is connected with a divider respectively, and the divider is connected with a function sets module, the function sets module with
First multiplier is connected；Also including one is used to gather the primary frequency modulation standard operation compensation that unit is calculated according to mains frequency deviation
3rd signal picker of amount, the 3rd signal picker is connected with first multiplier；Also include analog generator,
Second multiplier and lower bound clipping module high, first multiplier are connected with lower bound clipping module high, and the analog quantity occurs
Device is connected with the ceiling value input of lower bound clipping module high, and second multiplier is defeated with the low clip of lower bound clipping module high
Enter end connection.
Further optimally, an input of second multiplier is constant value -1.
Further optimally, the function in the function sets module is dead-time voltage function, and the dead time scope is
0.05-0.1。
Further optimally, the numerical parameter of the analog generator sets as follows：a)250MW>P0Fired power generating unit,
Limited amplitude >=10%P0；b)350MW≥P0The fired power generating unit of >=250MW, limited amplitude >=8%P0；c)500MW≥P0>
The fired power generating unit of 350MW, limited amplitude >=7%P0；d)P0>The fired power generating unit of 500MW, limited amplitude >=6%P0
The beneficial effects of the utility model：
(1) quality of the primary frequency modulation performance of grid-connected unit directly affects the stabilization of mains frequency, by the utility model
Steam flow is not enough during can effectively solve the problem that thermal power generation unit due to extraction for heat supply and the primary frequency modulation action amplitude that causes
Not enough problem, to ensure that unit movement range reaches power network norm standard requirement.
(2) the utility model can be solved because heat supply caused unit primary frequency modulation performance assessment criteria difference etc. of drawing gas is actual difficult
Topic, can effectively meet requirement of the power network for unit primary frequency modulation, meet frequency modulation peak regulation demand.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model；
Wherein, the 1, first signal picker, 2, secondary signal collector, 3, divider, 4, function sets module, the 5, the 3rd
Signal picker, the 6, first multiplier, 7, analog generator, the 8, second multiplier, 9, lower bound clipping module high.
Specific embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of primary frequency modulation optimal control device drawn gas based on heat supply of the present embodiment, including for gathering
First signal picker 1 of unit heat supply extraction flow and the secondary signal collector 2 for gathering total steam flow, described
One signal picker 1, secondary signal collector 2 are connected with a divider 3 respectively, the function sets module 4 of the divider 3 and
Connection, the function sets module 4 is connected with the first multiplier 6；Also including one is used to gather unit according to mains frequency deviation
3rd signal picker 5 of the primary frequency modulation standard operation compensation rate for calculating, the 3rd signal picker 5 multiplies with described first
Musical instruments used in a Buddhist or Taoist mass 6 is connected；Also include analog generator 7, the second multiplier 8 and lower bound clipping module 9 high, first multiplier 6 with
Lower bound clipping module 9 high is connected, and the analog generator 7 is connected with the ceiling value input of lower bound clipping module 9 high, described
Second multiplier 8 is connected with the low clip input of lower bound clipping module 9 high, and an input of second multiplier 8 is
Constant value -1, the function in the function sets module 4 is dead-time voltage function, and the dead time scope is 0.05-0.1, institute
The numerical parameter for stating analog generator 7 is set：a)250MW>P0Fired power generating unit, limited amplitude >=10%P0；b)350MW≥
P0The fired power generating unit of >=250MW, limited amplitude >=8%P0；c)500MW≥P0>The fired power generating unit of 350MW, limited amplitude >=7%
P0；d)P0>The fired power generating unit of 500MW, limited amplitude >=6%P, the divider 3 is DIV dividers 3.
Specifically operation principles are：
X1 inputs, the X2 inputs respectively with DIV dividers 3 of first signal picker 1, secondary signal collector 2
End connection, the output of the DIV dividers 3 is connected with the input of F (x) function sets module 4, the 3rd signal picker
5th, the X1 inputs respectively with the first multipliers of MUL1 6 of F (x) function sets module 4, X2 inputs are connected, the A analog quantitys hair
Raw device 7 is connected with the X1 inputs of the second multipliers of MUL2 8, the A analog generators 7 and HLLMT lower bound clipping modules 9 high
Amplitude limit input H high connections, the low clip input L of the second multipliers of the MUL2 8 and HLLMT lower bound clipping modules 9 high
Connection, first multipliers of MUL1 6 are connected with the input X of HLLMT lower bound clipping modules 9 high.3rd signal picker 5
Collection is that the primary frequency modulation standard operation that primary frequency modulation standard operation compensation rate, i.e. unit are calculated according to mains frequency deviation is mended
The amount of repaying.Unit heat supply extraction flow, total steam flow that first signal picker 1, secondary signal collector 2 will be collected respectively
Delivering to DIV dividers 3 carries out division arithmetic, is then processed through F (x) function sets module 4, and the function is a dead-time voltage letter
Number, when heat supply extraction flow is smaller, when controlling within the specific limits, it is believed that the influence to unit acting is ignored, not right
Standard operation compensation rate is modified；When heat supply extraction flow is larger, accounts for certain ratio of total steam flow, due to acting
Deficiency need to carry out Linear Amplifer to primary frequency modulation standard operation compensation rate, be made up by more actuating quantities because heat supply is drawn gas
The influence for causing, i.e., now the primary frequency modulation motion compensation amount of reality output is greater than standard operation compensation rate.Because unit is pressed
The quasi- design of sighting target, have 10% capacity expansion, i.e. 300MW units in theory maximum regulatory power to 330MW, but actual fortune
In row can difference, therefore the dead time scope of F (x) function sets module 4 is 0.05-0.1.
Specific example 1：
By taking the direct-firing unit of the subcritical malleations of certain 300MW in national grid as an example, its design total steam flow is 1024t/
H, according to Q/GDW 669-2011《Thermal power generation unit primary frequency modulation test guidance》And GB/T30370-2013《Thermoelectric generator
The experiment of group primary frequency modulation and performances acceptance directive/guide》Middle regulation, 50 ± 0.033Hz of primary frequency modulation dead band (± 2rpm), A analog quantitys hair
Value in raw device 7 is set to 8%P0, i.e. 24MW, behind dead band, fired power generating unit 1rpm correspondence primary frequency modulation standard compensation amounts are
2MW。
If it is -0.1Hz that certain moment mains frequency is 49.9Hz, i.e. power network frequency difference, correspondence speed discrepancy is -6rpm, deducts dead
Area, unit primary frequency modulation standard compensation amount is 8MW, and the value of the collection of the 3rd signal picker 5 is 8；Secondary signal collector 2 is adopted
Collection；High and low amplitude limit input H, L of HLLMT lower bound clipping modules 9 high are respectively+24, -24；It is dead in F (x) function sets modules
It is 0.05 that area sets scope.
(1) if now non-extraction for heat supply, the numerical value that the first signal picker 1 is collected is the output of 0, DIV dividers 3
Be 0, smaller value in the 0.05 of F (x) function sets module 4 dead zone range, F (x) function sets modules output valve 1, i.e., not
Unit primary frequency modulation standard compensation amount is modified, final primary frequency modulation power back-off amount is standard volume 8MW；
(2) if now extraction for heat supply, extraction flow is 150t/h, then the numerical value that the first signal picker 1 is collected is
200, the numerical value that secondary signal collector 2 is collected is output as 0.167 for 900, DIV dividers 3, beyond F (x) function sets
The dead zone range of the 0.05 of module 4, F (x) function sets module output valves are a numerical value more than 1, i.e., not to unit once
Frequency modulation standard compensation amount is modified, and final primary frequency modulation power back-off amount is the numerical value more than 8MW, i.e., by bigger compensation
Measure the influence drawn gas come more foot and caused.
The utility model does not describe part in detail, is the known technology of those skilled in the art of the present technique.Finally illustrate, with
Upper embodiment is only used to illustrate the technical solution of the utility model and unrestricted, although with reference to preferred embodiment to the utility model
It has been be described in detail that, it will be understood by those within the art that, the technical solution of the utility model can be repaiied
Change or equivalent, without deviating from the objective and scope of technical solutions of the utility model, it all should cover in the utility model
Right in the middle of.
Claims (4)
1. a kind of primary frequency modulation optimal control device drawn gas based on heat supply, it is characterised in that including for gathering unit heat supply
First signal picker of extraction flow and the secondary signal collector for gathering total steam flow, first signal acquisition
Device, secondary signal collector are connected with a divider respectively, and the divider is connected with a function sets module, and the function sets
Cover half block is connected with the first multiplier；Also including one is used to gather the primary frequency modulation standard that unit is calculated according to mains frequency deviation
3rd signal picker of motion compensation amount, the 3rd signal picker is connected with first multiplier；Also include simulation
Amount generator, the second multiplier and lower bound clipping module high, first multiplier are connected with lower bound clipping module high, the mould
Analog quantity generator is connected with the ceiling value input of lower bound clipping module high, second multiplier and lower bound clipping module high
Low clip input is connected.
2. the primary frequency modulation optimal control device drawn gas based on heat supply according to claim 1, it is characterised in that described
One input of paired multiplier is constant value -1.
3. the primary frequency modulation optimal control device drawn gas based on heat supply according to claim 1, it is characterised in that the letter
Function in number setting module is dead-time voltage function, and the dead time scope is 0.05-0.1.
4. the primary frequency modulation optimal control device drawn gas based on heat supply according to claim 1, it is characterised in that the mould
The numerical parameter of analog quantity generator sets as follows：a)250MW>P0Fired power generating unit, limited amplitude >=10%P0；b)350MW≥P0
The fired power generating unit of >=250MW, limited amplitude >=8%P0；c)500MW≥P0>The fired power generating unit of 350MW, limited amplitude >=7%P0；
d)P0>The fired power generating unit of 500MW, limited amplitude >=6%P0。
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| CN201621125998.9U CN206256936U (en) | 2016-10-14 | 2016-10-14 | A kind of primary frequency modulation optimal control device drawn gas based on heat supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107623327A (en) * | 2017-09-22 | 2018-01-23 | 国网山东省电力公司电力科学研究院 | Generating set primary frequency regulation dynamic compensation method and system based on steam enthalpy drop |
| CN110824355A (en) * | 2018-08-10 | 2020-02-21 | 中国石油化工股份有限公司 | Steam extraction heat supply unit simulation system |
-
2016
- 2016-10-14 CN CN201621125998.9U patent/CN206256936U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107623327A (en) * | 2017-09-22 | 2018-01-23 | 国网山东省电力公司电力科学研究院 | Generating set primary frequency regulation dynamic compensation method and system based on steam enthalpy drop |
| CN107623327B (en) * | 2017-09-22 | 2019-09-10 | 国网山东省电力公司电力科学研究院 | Generating set primary frequency regulation dynamic compensation method and system based on steam enthalpy drop |
| CN110824355A (en) * | 2018-08-10 | 2020-02-21 | 中国石油化工股份有限公司 | Steam extraction heat supply unit simulation system |
| CN110824355B (en) * | 2018-08-10 | 2021-08-31 | 中国石油化工股份有限公司 | Steam extraction heat supply unit simulation system |
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Granted publication date: 20170616 |