CN208073572U - A kind of power grid frequency modulation system based on frequency modulation bypass - Google Patents
A kind of power grid frequency modulation system based on frequency modulation bypass Download PDFInfo
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- CN208073572U CN208073572U CN201721885460.2U CN201721885460U CN208073572U CN 208073572 U CN208073572 U CN 208073572U CN 201721885460 U CN201721885460 U CN 201721885460U CN 208073572 U CN208073572 U CN 208073572U
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Abstract
The utility model discloses a kind of power grid frequency modulation systems based on frequency modulation bypass, including：Frequency modulation bypasses (1), its input terminal is connected to the input terminal of the high pressure turbine by regulating valve (P1) on the high pressure turbine by (107) of unit (100) and/or its input terminal is connected to the input terminal of the low voltage bypass regulating valve (P2) on the low voltage bypass (108) of unit (100)；Frequency modulation bypass control device (2), unit is used to adjust the frequency modulation demand electric load Q1 of unit (100) according to current electric grid (200) the actual power load Q2 of unit (100), by controlling the steam flow in frequency modulation bypass (1), to change the steam inlet amount into steam turbine (102).The utility model makes unit in the case where not changing the pitch aperture of steam turbine, burden requirement of the quick response power grid to the primary frequency modulation or frequency modulation frequency modulation of unit, it avoids the frequent frequency modulation of Steam Turhine Adjustment porthole from acting, ensure that stability and the safety of steam turbine, improve the service life of unit.
Description
Technical field
The utility model is related to power grid frequency modulation technical field more particularly to a kind of power grid frequency modulation systems based on frequency modulation bypass
System.
Background technology
Frequency is one of most important operating parameter of electric system, and frequency changes has weight to the safe and stable operation of system
The influence wanted.System interconnection enhances its ability for bearing active impact, but also increase simultaneously system may meet with it is active
The problem of imbalance, maintenance power grid and its frequency stabilization, is more prominent.Under perturbation action, mains frequency is controlled in desired model
It is one of the main target of power system security stable operation in enclosing, is generally realized by primary frequency modulation and frequency modulation frequency modulation.One
Secondary frequency modulation mainly plays frequency during dynamic and adjusts, and frequency modulation frequency modulation mainly passes through frequency modulation unit or unit
Load adjustment, will deviate from normal value frequency be adjusted to require stationary value.
The Automatic Generation Control (AGC) of thermal power generation unit, frequency modulation performance are that system adjusts unit to relate to 2 in net performance at present
Important indicator, dispatching of power netwoks have strict requirements to AGC, the frequency modulation performance of unit, this 2 indexs are also power grid " two detailed rules and regulations "
The important content of examination, especially AGC qualities directly embody the performance of unit.Unit mainly passes through boiler, steam turbine at present
Coordinate control, by increasing, subtracting fuel quantity, opens big or turn down the demand that steam turbine pitch carrys out responsive electricity grid, since boiler exists late
Prolong, unit load response has limitation always；Steam turbine is to ensure have adjusting allowance, pitch also to cannot keep full-gear,
Limit the depth of adjusting.
In addition, most of hair units use DEH (digital electric-hydraulic) control system, the stabilization for load and examination at present
Needs, avoid unit from being frequently adjusted with frequency variation, influence the stabilization of load, by turbine speed regulating system
Primary frequency modulation the dead time it is bigger, primary frequency modulation effect be almost removed so that the frequency of power grid is mainly by frequency modulation frequency modulation
To maintain.Research shows that when sudden accident and big load (power) disturb, many units are although with load is adjusted
Ability, but to the frequency modulation of frequency departure respond it is almost nil, at this time will the frequency of occurrences fluctuate widely even generating system collapse
Routed serious accident.
Presently, there are a variety of frequency modulation means, such as using large-scale accumulator carry out frequency modulation response and ancillary service, exist
That frequency modulation low-response, big, the of high cost, battery life of investment are short and fast charging and discharging is easy failure leads to problems such as to catch fire.
Utility model content
(1) purpose of utility model
The purpose of this utility model is to provide a kind of power grid frequency modulation system bypassed based on frequency modulation, is bypassed and is made using frequency modulation
For unit in the case where not changing the pitch aperture of steam turbine, quick response power grid is to the primary frequency modulation of unit or frequency modulation frequency modulation
Burden requirement avoids the frequent frequency modulation action of Steam Turhine Adjustment porthole, and solving the frequency modulation means of the prior art, there is tune
Frequency low-response, investment is big, of high cost, battery life is short and fast charging and discharging is easy to happen failure leads to problems such as to catch fire.
(2) technical solution
To solve the above problems, the utility model provides a kind of power grid frequency modulation system bypassed based on frequency modulation, including：It adjusts
Frequency bypasses, and input terminal is connected to the input terminal of the high pressure turbine by of unit and/or the low voltage bypass of its input terminal and the unit
Input terminal connection；Frequency modulation bypass control device is used for according to current electric grid to the frequency modulation demand electric load Q1 tune of the unit
The actual power load Q2 for saving the unit, by controlling the steam flow in the frequency modulation bypass, to change described in entrance
The steam inlet amount of the steam turbine of unit so that the unit is not in the case where changing the pitch aperture of the steam turbine, soon
Speed responds burden requirement of the power grid to the primary frequency modulation or frequency modulation frequency modulation of the unit.
Further, the frequency modulation, which bypasses, includes：First frequency modulation bypasses, and is provided with the first frequency modulation bypass valve, institute
The input terminal for stating the input terminal of the first frequency modulation bypass valve and the high pressure turbine by regulating valve on the high pressure turbine by of the unit connects
Logical, the output end of the first frequency modulation bypass valve is communicated to the reheating hot arc of the reheater of the unit or by water spray
Temperature-decreased pressure reducer is communicated to high pressure heat exchangers for district heating；And/or
4th frequency modulation bypasses, and is provided with the 4th frequency modulation bypass valve, the 4th frequency modulation bypass valve it is defeated
Enter end to be connected to the input terminal of the low voltage bypass regulating valve on the low voltage bypass of the unit, the 4th frequency modulation bypass valve
Output end be communicated to the condenser or oxygen-eliminating device of the unit, or the output end connection of the 4th frequency modulation bypass valve
To low pressure heat exchangers for district heating.
Further, the frequency modulation, which bypasses, further includes：Second frequency modulation bypasses, and is provided with spray desuperheating pressure reducer, described
The input terminal of spray desuperheating pressure reducer is connected to the output end of the first frequency modulation bypass valve, the spray desuperheating pressure reducer
Output end be communicated to the unit steam boiler reheater cold section of reheating or be communicated to high pressure heat supply network heating
Device.
Further, the initial position of the first frequency modulation bypass valve and/or the 4th frequency modulation bypass valve setting exists
Intermediate aperture；The frequency modulation bypass control device controls the first frequency modulation bypass valve and/or the bypass of the 4th frequency modulation is adjusted
Valve increases aperture, to reduce the steam inlet amount for the steam turbine for entering the unit so that the unit fast cutback response
The frequency modulation demand of the power grid；Or the frequency modulation bypass control device controls the first frequency modulation bypass valve and/or the
Four frequency modulation bypass valves reduce aperture, to increase the steam inlet amount for the steam turbine for entering the unit so that the unit
Quick load up responds the frequency modulation demand of the power grid.
Further, the first frequency modulation bypass valve and/or the 4th frequency modulation bypass valve, which use, pneumatically or hydraulically holds
The precision of the quick aperture variation adjusting of row mechanism, the first frequency modulation bypass valve and/or the 4th frequency modulation bypass valve,
Speed and response time meet the needs of unit frequency modulation.
Further, the frequency modulation, which bypasses, includes：Third frequency modulation bypasses, and is provided with third frequency modulation bypass valve and spray
Water temperature-decreased pressure reducer, the input terminal of the third frequency modulation bypass valve and the high pressure turbine by tune on the high pressure turbine by of the unit
The input terminal connection of valve is saved, the output end of the third frequency modulation bypass valve is communicated to the input of the spray desuperheating pressure reducer
End, the output end of the spray desuperheating pressure reducer are communicated to cold section of the reheating of the reheater of the steam boiler of the unit or connect
Lead to high pressure heat exchangers for district heating；And/or
4th frequency modulation bypasses, and is provided with the 4th frequency modulation bypass valve, the 4th frequency modulation bypass valve it is defeated
Enter end to be connected to the input terminal of the low voltage bypass regulating valve on the low voltage bypass of the unit, the 4th frequency modulation bypass valve
Output end be communicated to the condenser or oxygen-eliminating device of the unit, or the output end connection of the 4th frequency modulation bypass valve
To low pressure heat exchangers for district heating.
Further, the initial position of the third frequency modulation bypass valve and/or the 4th frequency modulation bypass valve setting exists
Intermediate aperture；The frequency modulation bypass control device controls the third frequency modulation bypass valve and/or the bypass of the 4th frequency modulation is adjusted
Valve increases aperture, to reduce the steam inlet amount for the steam turbine for entering the unit so that the unit fast cutback response
The frequency modulation demand of the power grid；Or the frequency modulation bypass control device controls the third frequency modulation bypass valve and/or the
Four frequency modulation bypass valves reduce aperture, to increase the steam inlet amount for the steam turbine for entering the unit so that the unit
Quick load up responds the frequency modulation demand of the power grid.
Further, the third frequency modulation bypass valve and/or the 4th frequency modulation bypass valve, which use, pneumatically or hydraulically holds
The precision of the quick aperture variation adjusting of row mechanism, the third frequency modulation bypass valve and/or the 4th frequency modulation bypass valve,
Speed and response time meet the needs of unit frequency modulation.
Further, the third frequency modulation bypass valve and spray desuperheating pressure reducer are integral type or split structure；
And/or the 4th frequency modulation bypass valve and spray desuperheating pressure reducer are integral type or split structure.
Further, it is additionally provided with spray desuperheating pressure reducer in the 4th frequency modulation bypass；The spray desuperheating pressure reducer
Input terminal is connected to the output end of the 4th frequency modulation bypass valve, and output end is communicated to the condenser of the unit or removes
Oxygen device, or its output end are communicated to low pressure heat exchangers for district heating.
Further, when the input terminal of the frequency modulation bypass is connected to the input terminal of the high pressure turbine by of the unit, the tune
The range of flow of the pipeline of frequency bypass is the 1%~50% of the metered flow of the pipeline of the high pressure turbine by；And/or
When the input terminal of the frequency modulation bypass is connected to the input terminal of the low voltage bypass low voltage bypass of the unit, the tune
The range of flow of the pipeline of frequency bypass is the 1%~50% of the metered flow of the pipeline of the low voltage bypass.
Further, the frequency modulation bypass control device includes：Acquisition module is used to obtain tune of the current electric grid to unit
The actual power load Q2 of frequency demand electric load Q1 and unit；Comparison module is used for the tune to unit by the current electric grid
Frequency demand electric load Q1 is compared with the actual power load Q2 of unit, obtains comparison result；Matching module is used for basis
The comparison result is matched to predetermined control strategy corresponding with the comparison result；Control module is used for according to
Predetermined control strategy exports control parameter, to control the actual power load Q2 of the unit.
(3) advantageous effect
The above-mentioned technical proposal of the utility model has following beneficial technique effect：
A kind of power grid frequency modulation system based on frequency modulation bypass provided by the utility model, is bypassed using frequency modulation so that unit exists
In the case of the pitch aperture for not changing steam turbine, quick response power grid wants the primary frequency modulation of unit or the load of frequency modulation frequency modulation
It asks, avoids the frequent frequency modulation action of Steam Turhine Adjustment porthole, big, cost is invested in the frequency modulation means presence for solving the prior art
Height, battery life are short and fast charging and discharging is easy to happen failure leads to problems such as to catch fire.The utility model is bypassed based on frequency modulation
Power grid frequency modulation system, realize the quick increase and decrease of unit load using frequency modulation bypass, not only meet unit to power grid frequency modulation
Quick response requirement, and ensure that the steam boiler of unit, steam turbine, generator and other auxiliary Mechanical Running Conditions
Stability and safety, improve the service life of unit, and frequency modulation cost is extremely low, be a kind of unit frequency modulation system of highly effective and safe
System.
Description of the drawings
Fig. 1 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment one provides
Figure；
Fig. 2 is the frequency modulation bypass control device composition schematic diagram that the utility model embodiment one provides；
Fig. 3 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment two provides
Figure；
Fig. 4 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment three provides
Figure；
Fig. 5 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment four provides
Figure；
Fig. 6 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment five provides
Figure；
Fig. 7 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment six provides
Figure；
Fig. 8 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment seven provides
Figure；
Fig. 9 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment eight provides
Figure；
Figure 10 is a kind of power grid frequency modulation method flow diagram bypassed based on frequency modulation that the utility model embodiment nine provides；
Figure 11 be the utility model embodiment nine provide according to comparison result, be matched to corresponding with comparison result pre-
If the method flow diagram of control strategy；
Figure 12 is the method for the steam inlet amount for the steam turbine that the reduction that the utility model embodiment nine provides enters unit
Flow chart；
Figure 13 is the method for the steam inlet amount for the steam turbine that the increase that the utility model embodiment nine provides enters unit
Flow chart.
Reference numeral：
1, frequency modulation bypasses, the bypass of the 11, first frequency modulation, A1, the first frequency modulation bypass valve, the bypass of the 12, second frequency modulation, 13,
Third frequency modulation bypasses, A2, third frequency modulation bypass valve, the bypass of the 14, the 4th frequency modulation, A3, the 4th frequency modulation bypass valve, J1-
J2, shut-off valve, 2, frequency modulation bypass control device, 21, acquisition module, 22, comparison module, 23, matching module, 24, control module,
3, spray desuperheating pressure reducer, 100, unit, 101, steam boiler, 1011, reheater, 1011a, reheating hot arc, 1011b, reheating
Cold section, 102, steam turbine, 102a, high pressure cylinder, 102b, intermediate pressure cylinder, 102c, low pressure (LP) cylinder, 103, generator, 104, condenser,
105, oxygen-eliminating device, 106, feed pump, 107, high pressure turbine by, 108, low voltage bypass, P1, high pressure turbine by regulating valve, P2, low voltage bypass
Regulating valve, 200, power grid, 301, high pressure heat exchangers for district heating, 302, low pressure heat exchangers for district heating.
Specific implementation mode
To make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment
And with reference to attached drawing, the utility model is further described.It should be understood that these descriptions are merely illustrative, and do not really want
Limit the scope of the utility model.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid not
Necessarily obscure the concept of the utility model.
Before a kind of power grid frequency modulation system based on frequency modulation bypass to the utility model is described in detail, it is situated between first
Continue the basic structure of unit 100.
Unit 100 includes：
Steam boiler 101 is one of the three big equipment of unit 100, for generating steam.
Reheater 1011 is arranged in steam boiler 101, and cold section of 1011b of entrance and reheating is connected to, and outlet passes through reheating
Hot arc 1011a is communicated to low voltage bypass 108.
Steam turbine 102, the outlet of entrance and steam boiler 101, for steam can be converted to mechanical energy, including
High pressure cylinder 102a, intermediate pressure cylinder 102b and low pressure (LP) cylinder 102c.
Generator 103, the low pressure (LP) cylinder 102c be connected by powers with steam turbine 102 are used for machine under the driving of steam turbine 102
Tool can be converted to electric energy, power for power grid 200.
Condenser 104, the outlet of entrance and low pressure (LP) cylinder 102c, while being connected to the output end of low voltage bypass 108.
Oxygen-eliminating device 105, the outlet that entrance passes through condensate line and condenser 104.
Feed pump 106, the outlet of entrance and oxygen-eliminating device 105, outlet are communicated to steam copper by supply line
The entrance of stove 101.
High pressure turbine by 107, input terminal are connected to the pipeline of the entrance of the high pressure cylinder 102a of steam turbine 102, and output end connects
Lead to cold section of 1011b of reheating of reheater 1011.
High pressure turbine by regulating valve P1 and spray desuperheating pressure reducer 3 are provided on high pressure turbine by 107.
Low voltage bypass 108, input terminal are connected to the pipeline of the entrance of the intermediate pressure cylinder 102b of steam turbine 102, and output end connects
Lead to the entrance of condenser 104.
Low voltage bypass regulating valve P2 and spray desuperheating pressure reducer 3 are provided on low voltage bypass 108.
Embodiment one
Fig. 1 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment one provides
Figure.
Fig. 1 is please referred to, the present embodiment provides a kind of power grid frequency modulation systems based on frequency modulation bypass, including：Frequency modulation bypasses 1 He
Frequency modulation bypass control device 2.
Frequency modulation bypass 1, input terminal is connected to the input terminal of the high pressure turbine by 107 of unit 100.
Specifically, in the present embodiment, frequency modulation bypass 1 includes：
First frequency modulation bypass 11, is provided with the first frequency modulation bypass valve A1, the first frequency modulation bypass valve A1's
Input terminal is connected to the input terminal of the high pressure turbine by regulating valve P1 on the high pressure turbine by 107 of unit 100, and the bypass of the first frequency modulation is adjusted
The output end of valve A1 is communicated to the reheating hot arc 1011a of the reheater 1011 of unit 100.
Frequency modulation bypass control device 2, for the frequency modulation demand electric load Q1 tune to unit 100 according to current electric grid 200
The actual power load Q2 for saving unit 100, by controlling the steam flow in frequency modulation bypass 1, to change into unit 100
The steam inlet amount of steam turbine 102 so that unit 100 is not in the case where changing the pitch aperture of steam turbine 102, quick response
Burden requirement of the power grid 200 to the primary frequency modulation or frequency modulation frequency modulation of unit 100.
Fig. 2 is the frequency modulation bypass control device composition schematic diagram that the utility model embodiment one provides.
In the present embodiment, frequency modulation bypass control device 2 includes：
Acquisition module 21 is used to obtain frequency modulation demand electric load Q1 and unit 100 of the current electric grid 200 to unit 100
Actual power load Q2；
Comparison module 22 is used for frequency modulation demand electric load Q1 and unit 100 to unit 100 by current electric grid 200
Actual power load Q2 is compared, and obtains comparison result；
Matching module 23 is used to, according to comparison result, be matched to predetermined control strategy corresponding with comparison result；
Control module 24 is used to export control parameter according to predetermined control strategy, to control the actual power of unit 100
Load Q2.
In the present embodiment, the initial position of the first frequency modulation bypass valve A1 is arranged in intermediate aperture.
The the first frequency modulation bypass valve of control of frequency modulation bypass control device 2 A1 increases aperture, to reduce into unit 100
The steam inlet amount of steam turbine 102；Alternatively, the first frequency modulation bypass valve of control of frequency modulation bypass control device 2 A1 reduces aperture,
To increase the steam inlet amount into the steam turbine 102 of unit 100.
Specifically, some vapor of the high pressure cylinder 102a input sides of unit 100 is by the first frequency modulation bypass 11 and setting
The first frequency modulation bypass valve A1 in the first frequency modulation bypass 11, is transported to the reheating hot arc of the reheater 1011 of unit 100
1011a.The the first frequency modulation bypass valve of control of frequency modulation bypass control device 2 A1 increases aperture, to reduce the steam turbine of unit 100
The steam inlet amount of 102 high pressure cylinder 102a, so meet unit 100 quickly reduce generation load the needs of.Alternatively, by frequency modulation
The the first frequency modulation bypass valve of control of road control device 2 A1 reduces aperture, to increase the high pressure cylinder of the steam turbine 102 of unit 100
The steam inlet amount of 102a, and then meet the needs of unit 100 quickly increases generation load.
In the present embodiment, the first frequency modulation bypass valve A1 is using pneumatically or hydraulically executing agency, the bypass of the first frequency modulation
Precision, speed and the response time that the quick aperture variation of regulating valve A1 is adjusted should meet the needs of generating set frequency modulation.But
The utility model is not limited system, and the first frequency modulation bypass valve A1 may be that other meet generating set frequency modulation demand
Executing agency.
When the input terminal of frequency modulation bypass 1 is connected to the input terminal of the high pressure turbine by 107 of unit 100, the pipeline of frequency modulation bypass 1
Range of flow be high pressure turbine by 107 pipeline metered flow 1%~50%.
Specifically, in the present embodiment, on the input terminal of the first frequency modulation bypass 11 and the high pressure turbine by 107 of unit 100
The input terminal of high pressure turbine by regulating valve P1 is connected to, and the output end of the first frequency modulation bypass 11 is communicated to the reheater 1011 of unit 100
Reheating hot arc 1011a, at this point, the first frequency modulation bypass 11 pipeline range of flow be high pressure turbine by 107 pipeline it is specified
The 1%~50% of flow.
Power grid frequency modulation system provided in this embodiment based on frequency modulation bypass, frequency modulation bypass control device 2 is according to current electricity
Net 200 adjusts the frequency modulation demand electric load Q1 of unit 100 the actual power load Q2 of unit 100, by controlling the first frequency modulation
The aperture of bypass valve A1, to decrease or increase the steam inlet amount for the steam turbine 102 for entering unit 100 so that unit 100
In the case where not changing the pitch aperture of steam turbine, primary frequency modulation or frequency modulation frequency modulation of the quick response power grid 200 to unit 100
Burden requirement, avoid the frequent frequency modulation of 102 timing steam gate of steam turbine from acting, ensure that the stability and safety of steam turbine 102
Property, while improving the service life of generating set.
Embodiment two
Fig. 3 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment two provides
Figure.
Please refer to Fig. 3, the present embodiment with embodiment one the difference is that, the frequency modulation bypass 1 in the present embodiment is in reality
It applies and increases the second frequency modulation bypass 12 on the basis of example one, the bypass 11 of the first frequency modulation and the second frequency modulation bypass 12 share by the first frequency modulation
Steam flow in the regulating valve A1 control pipers of road.
Second frequency modulation bypass 12, be provided with spray desuperheating pressure reducer 3, the input terminal of the spray desuperheating pressure reducer 3 with
The output end of first frequency modulation bypass valve A1 is connected to, and the output end of spray desuperheating pressure reducer 3 is communicated to the steam copper of unit 100
Cold section of 1011b of reheating of the reheater 1011 of stove 101.
In the present embodiment, it is additionally provided with shut-off valve J1 in the first frequency modulation bypass 11, shut-off valve J1 settings are adjusted first
Between the output end of frequency bypass valve A1 and the reheating hot arc 1011a of the reheater 1011 of unit 100, adjusted for controlling first
The break-make of pipeline between the output end and reheating hot arc 1011a of frequency bypass valve A1.
In the present embodiment, it is additionally provided with shut-off valve J2 in the second frequency modulation bypass 12, shut-off valve J2 settings are adjusted first
Between the output end of frequency bypass valve A1 and the input terminal of the spray desuperheating pressure reducer 3 in the second frequency modulation bypass 12, for controlling
Make the pipeline break-make of the second frequency modulation bypass 12.
When J1 is opened, and J2 is closed, 11 connection of the first frequency modulation bypass, the second frequency modulation bypass 12 is disconnected, is only adjusted by first
Frequency bypass 11 carries out the steam inlet amount of the high pressure cylinder 102a of control steam turbine 102, at this point, the high pressure cylinder 102a of unit 100 is defeated
The some vapor for entering side is adjusted by the first frequency modulation bypass 11 and the first frequency modulation bypass being set in the first frequency modulation bypass 11
Valve A1 is transported to the reheating hot arc 1011a of the reheater 1011 of unit 100.
When J1 is closed, and J2 is opened, the pipe between the output end and reheating hot arc 1011a of the first frequency modulation bypass valve A1
Road disconnects, and 12 connection of the second frequency modulation bypass bypasses 12 co- controlling steam turbines 102 by the bypass 11 of the first frequency modulation and the second frequency modulation
High pressure cylinder 102a steam inlet amount, at this point, some vapor of the high pressure cylinder 102a input sides of unit 100 first passes through the first tune
Frequency bypass 11 and the first frequency modulation bypass valve A1 being set in the first frequency modulation bypass 11 enter the second frequency modulation bypass 12, then
12 are bypassed by the second frequency modulation, is finally transported to cold section of 1011b of reheating of reheater 1011.
When the input terminal of frequency modulation bypass 1 is connected to the input terminal of the high pressure turbine by 107 of unit 100, the pipeline of frequency modulation bypass 1
Range of flow be high pressure turbine by 107 pipeline metered flow 1%~50%.
Specifically, in the present embodiment, on the input terminal of the first frequency modulation bypass 11 and the high pressure turbine by 107 of unit 100
The input terminal of high pressure turbine by regulating valve P1 is connected to, and the output end of the first frequency modulation bypass 11 is communicated to the reheater 1011 of unit 100
Reheating hot arc 1011a or the output end of the first frequency modulation bypass 11 unit 100 12 is communicated to again by the bypass of the second frequency modulation
Cold section of 1011b of reheating of hot device 1011.At this point, the range of flow of the pipeline of the first frequency modulation bypass 11 is the pipe of high pressure turbine by 107
The metered flow on road 1%~50% or first the range of flow of pipeline of frequency modulation bypass 11 and the second frequency modulation bypass 12 be
The 1%~50% of the metered flow of the pipeline of high pressure turbine by 107.
Structure, composition and the connection relation of other parts in the present embodiment are identical as embodiment one, no longer superfluous herein
It states.
Embodiment three
Fig. 4 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment three provides
Figure.
Please refer to Fig. 4, the present embodiment with embodiment one the difference is that, frequency modulation bypass 1 in the present embodiment is the
Three frequency modulation bypass 13 replaces the first frequency modulation bypass 11 in embodiment one using third frequency modulation bypass 13.
In the present embodiment, third frequency modulation bypass valve A2 and spray desuperheating decompression are provided in third frequency modulation bypass 13
Device 3, the input terminal of third frequency modulation bypass valve A2 is with the high pressure turbine by regulating valve P1's on the high pressure turbine by 107 of unit 100
Input terminal is connected to, and the output end of third frequency modulation bypass valve A2 is communicated to the input terminal of spray desuperheating pressure reducer 3, spray desuperheating
The output end of pressure reducer 3 is communicated to cold section of 1011b of reheating of the reheater 1011 of the steam boiler 101 of unit 100.
In the present embodiment, the initial position of third frequency modulation bypass valve A2 is arranged in intermediate aperture.
Frequency modulation bypass control device 2 controls third frequency modulation bypass valve A2 and increases aperture, to reduce into unit 100
The steam inlet amount of steam turbine 102 so that the frequency modulation demand of 100 fast cutback responsive electricity grid 200 of unit；Alternatively, by frequency modulation
Road control device 2 controls third frequency modulation bypass valve A2 and reduces aperture, to increase the steam turbine 102 for entering the unit 100
Steam inlet amount so that the frequency modulation demand of 100 fast cutback responsive electricity grid 200 of unit.
Specifically, some vapor of the high pressure cylinder 102a input sides of unit 100 is by third frequency modulation bypass 13 and setting
In third frequency modulation bypass valve A2 and spray desuperheating pressure reducer 3 in third frequency modulation bypass 13, it is transported to the reheating of unit 100
Cold section of 1011b of reheating of device 1011.Frequency modulation bypass control device 2 controls third frequency modulation bypass valve A2 and increases aperture, to subtract
The steam inlet amount of the high pressure cylinder 102a of the steam turbine 102 of few unit 100, and then meet the quickly reduction generation load of unit 100
Demand so that the frequency modulation demand of 100 fast cutback responsive electricity grid 200 of unit.Alternatively, frequency modulation bypass control device 2 controls
Third frequency modulation bypass valve A2 reduces aperture, to increase the steam inlet of the high pressure cylinder 102a of the steam turbine 102 of unit 100
Amount, and then meet the needs of unit 100 quickly increases generation load so that the tune of 100 quick load up responsive electricity grid 200 of unit
Frequency demand.
In the present embodiment, third frequency modulation bypass valve A2 is using pneumatically or hydraulically executing agency, the bypass of third frequency modulation
Precision, speed and the response time that the quick aperture variation of regulating valve A2 is adjusted meet the needs of unit frequency modulation.But this practicality
Novel to be not limited system, third frequency modulation bypass valve A2 may be the execution machine that other meet generating set frequency modulation demand
Structure.
In the present embodiment, third frequency modulation bypass valve A2 and spray desuperheating pressure reducer 3 are integral type or split type
Structure, the utility model are not limited system, and the concrete structure of third frequency modulation bypass valve A2 and spray desuperheating pressure reducer 3 can
Appropriate adjustment according to actual needs.
When the input terminal of frequency modulation bypass 1 is connected to the input terminal of the high pressure turbine by 107 of unit 100, the pipeline of frequency modulation bypass 1
Range of flow be high pressure turbine by 107 pipeline metered flow 1%~50%.
Specifically, in the present embodiment, on the input terminal of third frequency modulation bypass 13 and the high pressure turbine by 107 of unit 100
The input terminal of high pressure turbine by regulating valve P1 is connected to, and the output end of third frequency modulation bypass 13 is communicated to the steam boiler 101 of unit 100
Reheater 1011 cold section of 1011b of reheating, at this point, third frequency modulation bypass 13 pipeline range of flow be high pressure turbine by 107
Pipeline metered flow 1%~50%.
Structure, composition and the connection relation of other parts in the present embodiment are identical as embodiment one, no longer superfluous herein
It states.
Example IV
Fig. 5 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment four provides
Figure.
Please refer to Fig. 5, the present embodiment with embodiment one the difference is that, frequency modulation bypass 1 bypasses 14 for the 4th frequency modulation.
4th frequency modulation bypass 14, is provided with the 4th frequency modulation bypass valve A3, the 4th frequency modulation bypass valve A3
Input terminal be connected to the input terminal of the low voltage bypass regulating valve P2 on the low voltage bypass 108 of unit 100, the 4th frequency modulation bypass
The output end of regulating valve A3 is communicated to the condenser 104 or oxygen-eliminating device 105 of unit 100.
Optionally, the 4th frequency modulation bypass 14 on be additionally provided with spray desuperheating pressure reducer 3, the spray desuperheating pressure reducer 3 it is defeated
Enter end to be connected to the output end of the 4th frequency modulation bypass valve A3, the output end of the spray desuperheating pressure reducer 3 is communicated to unit 100
Condenser 104 or oxygen-eliminating device 105.
But the utility model is not limited system, when the steam in low voltage bypass 108, which need to be only depressured, to cool down, the
4th frequency modulation bypass valve A3 can be only set in four frequency modulation bypass 14, and without setting spray desuperheating pressure reducer 3.
In the present embodiment, the initial position of the 4th frequency modulation bypass valve A3 is arranged in intermediate aperture.
The 4th frequency modulation bypass valve A3 of the control of frequency modulation bypass control device 2 increases aperture, to reduce into unit 100
The steam inlet amount of steam turbine 102 so that the frequency modulation demand of 100 fast cutback responsive electricity grid 200 of unit；Alternatively, by frequency modulation
The 4th frequency modulation bypass valve A3 of the control of road control device 2 reduces aperture, to increase the steaming into the steam turbine 102 of unit 100
Vapour air inflow so that the frequency modulation demand of 100 quick load up responsive electricity grid 200 of unit.
Specifically, some vapor of the intermediate pressure cylinder 102b input sides of unit 100 is by the 4th frequency modulation bypass 14 and setting
In the 4th frequency modulation bypass valve A3 and spray desuperheating pressure reducer 3 in the 4th frequency modulation bypass 14, it is transported to the condensing of unit 100
Device 104 or oxygen-eliminating device 105.It, can in the 4th frequency modulation bypass 14 when the steam in low voltage bypass 108, which need to be only depressured, to cool down
Only the 4th frequency modulation bypass valve A3 of setting, and without setting spray desuperheating pressure reducer 3, at this point, the intermediate pressure cylinder 102b of unit 100
The some vapor of input side is adjusted by the 4th frequency modulation bypass 14 and the 4th frequency modulation bypass being set in the 4th frequency modulation bypass 14
Valve A3 is saved, the condenser 104 or oxygen-eliminating device 105 of unit 100 are transported to.Frequency modulation bypass control device 2 controls the bypass of the 4th frequency modulation
Regulating valve A3 increases aperture, to reduce the steam inlet amount of the intermediate pressure cylinder 102b of the steam turbine 102 of unit 100, and then meets machine
Group 100 quickly reduces the demand of generation load so that the frequency modulation demand of 100 fast cutback responsive electricity grid 200 of unit.Alternatively,
The 4th frequency modulation bypass valve A3 of the control of frequency modulation bypass control device 2 reduces aperture, to increase the steam turbine 102 of unit 100
The steam inlet amount of intermediate pressure cylinder 102b, and then meet the needs of unit 100 quickly increases generation load so that unit 100 is quick
The frequency modulation demand of load up responsive electricity grid 200.
In the present embodiment, the 4th frequency modulation bypass valve A3 is using pneumatically or hydraulically executing agency, the bypass of the 4th frequency modulation
Precision, speed and the response time that the quick aperture variation of regulating valve A3 is adjusted meet the needs of generating set frequency modulation.But this
Utility model is not limited system, and the 4th frequency modulation bypass valve A3 may be that other meet holding for generating set frequency modulation demand
Row mechanism.
In the present embodiment, the 4th frequency modulation bypass valve A3 and spray desuperheating pressure reducer 3 are integral type or split type
Structure, the utility model are not limited system, and the concrete structure of the 4th frequency modulation bypass valve A3 and spray desuperheating pressure reducer 3 can
Appropriate adjustment according to actual needs.
When the input terminal of frequency modulation bypass 1 is connected to the input terminal of the low voltage bypass 108 of unit 100, the pipeline of frequency modulation bypass 1
Range of flow be low voltage bypass 108 pipeline metered flow 1%~50%.
Specifically, in the present embodiment, on the input terminal of the 4th frequency modulation bypass 14 and the low voltage bypass 108 of unit 100
The input terminal of low voltage bypass regulating valve P2 is connected to, the output end of the 4th frequency modulation bypass 14 be communicated to unit 100 condenser 104 or
Oxygen-eliminating device 105, at this point, the range of flow of the pipeline of the 4th frequency modulation bypass 14 is the metered flow of the pipeline of low voltage bypass 108
1%~50%.
Structure, composition and the connection relation of other parts in the present embodiment are identical as embodiment one, no longer superfluous herein
It states.
Embodiment five
Fig. 6 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment five provides
Figure.
Fig. 6 is please referred to, the present embodiment is the combination of embodiment one and example IV, in the present embodiment, 1 packet of frequency modulation bypass
It includes：The bypass 11 of first frequency modulation and the 4th frequency modulation bypass 14.
In the present embodiment, the initial position of the first frequency modulation bypass valve A1 and the 4th frequency modulation bypass valve A3 are arranged
In intermediate aperture.
Frequency modulation bypass control device 2 controls the first frequency modulation bypass valve A1 and/or the 4th frequency modulation bypass valve A3 increases
Big aperture, to reduce the steam inlet amount into the steam turbine 102 of unit 100,；Alternatively, the control of frequency modulation bypass control device 2 the
One frequency modulation bypass valve A1 and/or the 4th frequency modulation bypass valve A3 reduce aperture, to increase the steam turbine into unit 100
102 steam inlet amount.
Specifically, the first frequency modulation bypass valve of control of frequency modulation bypass control device 2 A1 increases aperture, to reduce unit
The steam inlet amount and/or frequency modulation bypass control device 2 of the high pressure cylinder 102a of 100 steam turbine 102 controls the bypass of the 4th frequency modulation
Regulating valve A3 increases aperture, to reduce the steam inlet amount of the intermediate pressure cylinder 102b of the steam turbine 102 of unit 100, and then meets machine
Group 100 quickly reduces the demand of generation load.Subtract alternatively, frequency modulation bypass control device 2 controls the first frequency modulation bypass valve A1
Small guide vane, to increase the steam inlet amount and/or frequency modulation bypass control device of the high pressure cylinder 102a of the steam turbine 102 of unit 100
The 4th frequency modulation bypass valve A3 of 2 control reduces aperture, to increase the steam of the intermediate pressure cylinder 102b of the steam turbine 102 of unit 100
Air inflow, and then meet the needs of unit 100 quickly increases generation load.
Structure, composition and the connection relation of other parts in the present embodiment are identical as embodiment one and example IV,
Details are not described herein.
Embodiment six
Fig. 7 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment six provides
Figure.
Fig. 7 is please referred to, the present embodiment is the combination of embodiment two and example IV, in the present embodiment, 1 packet of frequency modulation bypass
It includes：First frequency modulation bypasses the bypass 12 of the 11, second frequency modulation and the 4th frequency modulation bypass 14.
In the present embodiment, the initial position of the first frequency modulation bypass valve A1 and the 4th frequency modulation bypass valve A3 are arranged
In intermediate aperture.
Frequency modulation bypass control device 2 controls the first frequency modulation bypass valve A1 and/or the 4th frequency modulation bypass valve A3 increases
Big aperture, to reduce the steam inlet amount for the steam turbine 102 for entering the unit 100 so that 100 fast cutback of unit responds
The frequency modulation demand of power grid 200；Alternatively, frequency modulation bypass control device 2 controls the first frequency modulation bypass valve A1 and/or the 4th frequency modulation
Bypass valve A3 reduces aperture, to increase the steam inlet amount into the steam turbine 102 of unit 100 so that unit 100 is quick
The frequency modulation demand of load up responsive electricity grid 200.
Specifically, the first frequency modulation bypass valve of control of frequency modulation bypass control device 2 A1 increases aperture, to reduce unit
The steam inlet amount and/or frequency modulation bypass control device 2 of the high pressure cylinder 102a of 100 steam turbine 102 controls the bypass of the 4th frequency modulation
Regulating valve A3 increases aperture, to reduce the steam inlet amount of the intermediate pressure cylinder 102b of the steam turbine 102 of unit 100, and then meets machine
Group 100 quickly reduces the demand of generation load so that the frequency modulation demand of 100 fast cutback responsive electricity grid 200 of unit.Alternatively,
First frequency modulation bypass valve A1 of the control of frequency modulation bypass control device 2 reduces aperture, to increase the steam turbine 102 of unit 100
The 4th frequency modulation bypass valve A3 reductions of steam inlet amount and/or frequency modulation bypass control device 2 control of high pressure cylinder 102a are opened
Degree to increase the steam inlet amount of the intermediate pressure cylinder 102b of the steam turbine 102 of unit 100, and then meets unit 100 and quickly increases hair
The demand of electric load so that the frequency modulation demand of 100 quick load up responsive electricity grid 200 of unit.
Structure, composition and the connection relation of other parts in the present embodiment are identical as embodiment two and example IV,
Details are not described herein.
Embodiment seven
Fig. 8 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment seven provides
Figure.
Fig. 8 is please referred to, the present embodiment is the combination of embodiment three and example IV, in the present embodiment, 1 packet of frequency modulation bypass
It includes：The bypass 13 of third frequency modulation and the 4th frequency modulation bypass 14.
In the present embodiment, the initial position of third frequency modulation bypass valve A2 and the 4th frequency modulation bypass valve A3 are arranged
In intermediate aperture.
Frequency modulation bypass control device 2 controls third frequency modulation bypass valve A2 and/or the 4th frequency modulation bypass valve A3 increases
Big aperture, to reduce the steam inlet amount into the steam turbine 102 of unit 100 so that 100 fast cutback responsive electricity grid of unit
200 frequency modulation demand；Alternatively, frequency modulation bypass control device 2 controls third frequency modulation bypass valve A2 and/or the bypass of the 4th frequency modulation
Regulating valve A3 reduces aperture, to increase the steam inlet amount into the steam turbine 102 of unit 100 so that unit 100 quickly rises negative
The frequency modulation demand of lotus responsive electricity grid 200.
Specifically, frequency modulation bypass control device 2, which controls third frequency modulation bypass valve A2, increases aperture, to reduce unit
The steam inlet amount and/or frequency modulation bypass control device 2 of the high pressure cylinder 102a of 100 steam turbine 102 controls the bypass of the 4th frequency modulation
Regulating valve A3 increases aperture, to reduce the steam inlet amount of the intermediate pressure cylinder 102b of the steam turbine 102 of unit 100, and then meets machine
Group 100 quickly reduces the demand of generation load so that the frequency modulation demand of 100 fast cutback responsive electricity grid 200 of unit.Alternatively,
Frequency modulation bypass control device 2 controls third frequency modulation bypass valve A2 and reduces aperture, to increase the steam turbine 102 of unit 100
The 4th frequency modulation bypass valve A3 reductions of steam inlet amount and/or frequency modulation bypass control device 2 control of high pressure cylinder 102a are opened
Degree to increase the steam inlet amount of the intermediate pressure cylinder 102b of the steam turbine 102 of unit 100, and then meets unit 100 and quickly increases hair
The demand of electric load so that the frequency modulation demand of 100 quick load up responsive electricity grid 200 of unit.
Structure, composition and the connection relation of other parts in the present embodiment are identical as embodiment three and example IV,
Details are not described herein.
Embodiment eight
Fig. 9 is a kind of connection signal for power grid frequency modulation system bypassed based on frequency modulation that the utility model embodiment eight provides
Figure.
Please refer to Fig. 9, the present embodiment is being further improved of being done on the basis of embodiment seven, the present embodiment and embodiment
Seven the difference is that, the output end of frequency modulation in the present embodiment bypass is communicated to heat exchangers for district heating.
In the present embodiment, frequency modulation bypass 1 includes：The bypass 13 of third frequency modulation and the 4th frequency modulation bypass 14.
Third frequency modulation bypass 13, is provided with third frequency modulation bypass valve A2 and spray desuperheating pressure reducer 3, third tune
The input terminal of frequency bypass valve A2 is connected to the input terminal of the high pressure turbine by regulating valve P1 on the high pressure turbine by 107 of unit 100,
The output end of third frequency modulation bypass valve A2 is communicated to the input terminal of spray desuperheating pressure reducer 3, spray desuperheating pressure reducer 3 it is defeated
Outlet is communicated to high pressure heat exchangers for district heating 301.
Specifically, some vapor of the high pressure cylinder 102a input sides of unit 100 is by third frequency modulation bypass 13 and setting
In third frequency modulation bypass valve A2 and spray desuperheating pressure reducer 3 in third frequency modulation bypass 13, it is transported to the heating of high pressure heat supply network
Device 301 becomes the hydrophobic oxygen-eliminating device 105 for squeezing into unit 100 after heat exchange.Frequency modulation bypass control device 2 is to third frequency modulation
The control of bypass valve A2 is identical as embodiment seven, and details are not described herein.
4th frequency modulation bypass 14, is provided with the 4th frequency modulation bypass valve A3, the 4th frequency modulation bypass valve A3's
Input terminal is connected to the input terminal of the low voltage bypass regulating valve P2 on the low voltage bypass 108 of unit 100, and the bypass of the 4th frequency modulation is adjusted
The output end of valve A3 is communicated to low pressure heat exchangers for district heating 302.
Specifically, some vapor of the intermediate pressure cylinder 102b input sides of unit 100 is by the 4th frequency modulation bypass 14 and setting
In the 4th frequency modulation bypass valve A3 and spray desuperheating pressure reducer 3 in the 4th frequency modulation bypass 14, it is transported to the heating of low pressure heat supply network
Device 302 becomes the hydrophobic condenser 104 for squeezing into unit 100 or oxygen-eliminating device 105 after heat exchange.When in low voltage bypass 108
Steam need to only be depressured when need not cool down, in the 4th frequency modulation bypass 14 can only the 4th frequency modulation bypass valve A3 of setting, without
With spray desuperheating pressure reducer 3 is arranged, at this point, some vapor of the intermediate pressure cylinder 102b input sides of unit 100 is by by the 4th frequency modulation
Road 14 and the 4th frequency modulation bypass valve A3 being set in the 4th frequency modulation bypass 14, are transported to low pressure heat exchangers for district heating 302,
Become the hydrophobic condenser 104 for squeezing into unit 100 or oxygen-eliminating device 105 after heat exchange.Frequency modulation bypass control device 2 is to
The control of four frequency modulation bypass valve A3 is identical as embodiment seven, and details are not described herein.
Structure, composition and the connection relation of other parts in the present embodiment are identical as embodiment seven, no longer superfluous herein
It states.
Similarly, the output end of the frequency modulation bypass 1 in embodiment one to embodiment six can also be communicated to heat exchangers for district heating,
In, when the output end of the first frequency modulation bypass 11 is communicated to high temperature heat exchangers for district heating 301, it is additionally provided in the first frequency modulation bypass 11
Spray desuperheating pressure reducer 3.Its connection relation and control method are similar with the present embodiment, and details are not described herein.
The power grid frequency modulation system based on frequency modulation bypass of the utility model, including but not limited to the above embodiment.
Embodiment nine
Figure 10 is a kind of power grid frequency modulation method flow diagram bypassed based on frequency modulation that the utility model embodiment nine provides.
Figure 10 is please referred to, the present embodiment provides a kind of power grid frequency modulation methods based on frequency modulation bypass, including：
S1 obtains current electric grid 200 to the frequency modulation demand electric load Q1 of unit 100 and the actual power load of unit 100
Q2。
The frequency modulation of unit 100 is needed specifically, the acquisition module 21 of frequency modulation bypass control device 2 obtains current electric grid 200
Seek the actual power load Q2 of electric load Q1 and unit 100.
S2, by current electric grid 200 to the frequency modulation demand electric load Q1 of unit 100 and the actual power load Q2 of unit 100
It is compared, obtains comparison result.
Specifically, the comparison module 22 of frequency modulation bypass control device 2 by current electric grid 200 to the frequency modulation demand of unit 100
Electric load Q1 is compared with the actual power load Q2 of unit 100, obtains comparison result.
S3 is matched to predetermined control strategy corresponding with comparison result according to comparison result.
Specifically, the matching module 23 of frequency modulation bypass control device 2 is matched to opposite with comparison result according to comparison result
The predetermined control strategy answered.
Figure 11 be the utility model embodiment nine provide according to comparison result, be matched to corresponding with comparison result pre-
If the method flow diagram of control strategy.
Figure 11 is please referred to, in the present embodiment, according to comparison result, is matched to default control corresponding with comparison result
Strategy step include：
S31, current electric grid 200 are less than the frequency modulation demand electric load Q1 of unit 100 the actual power load Q2 of unit 100
When, the steam inlet amount into the steam turbine 102 of unit 100 is reduced, to reduce the actual power load Q2 of unit.
Figure 12 is the method for the steam inlet amount for the steam turbine that the reduction that the utility model embodiment nine provides enters unit
Flow chart.
Figure 12 is please referred to, optionally, in the present embodiment, reduces the steam inlet amount into the steam turbine 102 of unit 100
The step of include：
S311a, controls the first frequency modulation bypass valve A1 and/or the 4th frequency modulation bypass valve A3 increases aperture.
Specifically, the first frequency modulation bypass valve of control of frequency modulation bypass control device 2 A1 increases aperture, enter machine to reduce
The steam inlet amount of the high pressure cylinder 102a of the steam turbine 102 of group 100；And/or frequency modulation bypass control device 2 controls by the 4th frequency modulation
Road regulating valve A3 increases aperture, to reduce the steam inlet amount of the intermediate pressure cylinder 102b into the steam turbine 102 of unit 100.
S312a, judges whether the first frequency modulation bypass valve A1 and/or the 4th frequency modulation bypass valve A3 reach maximum and open
Degree.
S313a1, if so, starting auxiliary load shedding scheme.
S313a2, if it is not, then continuing to increase the first frequency modulation bypass valve A1's and/or the 4th frequency modulation bypass valve A3
Aperture.
In the present embodiment, auxiliary load shedding scheme specifically refers to the high pressure turbine by regulating valve of the steam turbine 102 of unit 100
P1 increases aperture, and the low voltage bypass regulating valve P2 of steam turbine 102 increases aperture, and/or increases heat supply steam extraction tolerance.
Figure 12 is please referred to, optionally, in the present embodiment, reduces the steam inlet amount into the steam turbine 102 of unit 100
The step of include：
S311b, controls third frequency modulation bypass valve A2 and/or the 4th frequency modulation bypass valve A3 increases aperture.
Specifically, frequency modulation bypass control device 2, which controls third frequency modulation bypass valve A2, increases aperture, enter machine to reduce
The steam inlet amount of the high pressure cylinder 102a of the steam turbine 102 of group 100；And/or frequency modulation bypass control device 2 controls by the 4th frequency modulation
Road regulating valve A3 increases aperture, to reduce the steam inlet amount of the intermediate pressure cylinder 102b into the steam turbine 102 of unit 100.
S312b, judges whether third frequency modulation bypass valve A2 and/or the 4th frequency modulation bypass valve A3 reach maximum and open
Degree.
S313b1, if so, starting auxiliary load shedding scheme.
S313b2, if it is not, then continuing to increase third frequency modulation bypass valve A2's and/or the 4th frequency modulation bypass valve A3
Aperture.
S32, current electric grid 200 are more than the frequency modulation demand electric load Q1 of unit 100 the actual power load Q2 of unit 100
When, increase the steam inlet amount into the steam turbine 102 of unit 100, to increase the actual power load Q2 of unit 100.
Figure 13 is the method for the steam inlet amount for the steam turbine that the increase that the utility model embodiment nine provides enters unit
Flow chart.
Figure 13 is please referred to, optionally, in the present embodiment, increases the steam inlet amount into the steam turbine 102 of unit 100
The step of include：
S321a, controls the first frequency modulation bypass valve A1 and/or the 4th frequency modulation bypass valve A3 reduces aperture.
Specifically, the first frequency modulation bypass valve of control of frequency modulation bypass control device 2 A1 reduces aperture, enter machine to increase
The steam inlet amount of the high pressure cylinder 102a of the steam turbine 102 of group 100；And/or frequency modulation bypass control device 2 controls by the 4th frequency modulation
Road regulating valve A3 reduces aperture, to increase the steam inlet amount of the intermediate pressure cylinder 102b into the steam turbine 102 of unit 100.
S322a, judges whether the first frequency modulation bypass valve A1 and/or the 4th frequency modulation bypass valve A3 close.
S323a1, if so, starting auxiliary increases load scheme.
S323a2, if it is not, then continuing to reduce the first frequency modulation bypass valve A1's and/or the 4th frequency modulation bypass valve A3
Aperture.
In the present embodiment, auxiliary increases the high pressure turbine by regulating valve that load scheme specifically refers to the steam turbine 102 of unit 100
P1 reduces aperture, and the low voltage bypass regulating valve P2 of steam turbine 102 reduces aperture, and/or reduces heat supply steam extraction tolerance.
Figure 13 is please referred to, optionally, in the present embodiment, increases the steam inlet amount into the steam turbine 102 of unit 100
The step of include：
S321b, controls third frequency modulation bypass valve A2 and/or the 4th frequency modulation bypass valve A3 reduces aperture.
Specifically, frequency modulation bypass control device 2, which controls third frequency modulation bypass valve A2, reduces aperture, enter machine to increase
The steam inlet amount of the high pressure cylinder 102a of the steam turbine 102 of group 100；And/or frequency modulation bypass control device 2 controls by the 4th frequency modulation
Road regulating valve A3 reduces aperture, to increase the steam inlet amount of the intermediate pressure cylinder 102b into the steam turbine 102 of unit 100.
S322b, judges whether third frequency modulation bypass valve A2 and/or the 4th frequency modulation bypass valve A3 close.
S323b1, if so, starting auxiliary increases load scheme.
S323b2, if it is not, then continuing to reduce third frequency modulation bypass valve A2's and/or the 4th frequency modulation bypass valve A3
Aperture.
S4 exports control parameter according to predetermined control strategy, the actual power load Q2 of unit 100 is controlled, quickly to ring
Answer burden requirement of the power grid 200 to the primary frequency modulation or frequency modulation frequency modulation of unit 100.
Specifically, the control module 24 of frequency modulation bypass control device 2 exports control parameter, control according to predetermined control strategy
The actual power load Q2 of unit 100, with quick response power grid 200 to the primary frequency modulation of unit 100 or the load of frequency modulation frequency modulation
It is required that.
The power grid frequency modulation method based on frequency modulation bypass of the utility model, including but not limited to the above embodiment.
The utility model is intended to protect a kind of power grid frequency modulation system bypassed based on frequency modulation, is bypassed using frequency modulation so that unit
In the case where not changing the pitch aperture of steam turbine, quick response power grid is to the primary frequency modulation of unit or the load of frequency modulation frequency modulation
It is required that avoiding the frequent frequency modulation action of Steam Turhine Adjustment porthole, solve the prior art frequency modulation means exist investment it is big, at
This height, battery life are short and fast charging and discharging is easy to happen failure leads to problems such as to catch fire.The utility model based on frequency modulation by
The power grid frequency modulation system on road is realized the quick increase and decrease of unit load using frequency modulation bypass, not only meets unit to power grid tune
The quick response requirement of frequency, and ensure that steam boiler, steam turbine, generator and other auxiliary mechanical movement shapes of unit
The stability of state and safety improve the service life of unit, and frequency modulation cost is extremely low, are a kind of unit frequency modulation of highly effective and safe
System.
It should be understood that the above-mentioned specific implementation mode of the utility model is used only for exemplary illustration or explains this reality
With novel principle, without constituting limitations of the present invention.Therefore, in the spirit and scope without departing from the utility model
In the case of any modification, equivalent substitution, improvement and etc. done, should be included within the scope of protection of this utility model.In addition,
The appended claims for the utility model are intended to cover to fall into attached claim scope and boundary or this range and boundary
Whole change and modification examples in equivalent form.
Claims (12)
1. a kind of power grid frequency modulation system based on frequency modulation bypass, which is characterized in that including：
Frequency modulation bypasses (1), and input terminal is connected to the input terminal of the high pressure turbine by (107) of unit (100) and/or its input terminal
It is connected to the input terminal of the low voltage bypass (108) of the unit (100)；
Frequency modulation bypass control device (2), with frequency modulation bypass (1), the generator (103) and power grid of the unit (100)
(200) it connects, described in the frequency modulation demand electric load Q1 controls according to presently described power grid (200) to the unit (100)
Frequency modulation bypasses the steam flow in (1), to adjust the actual power load Q2 of the unit (100).
2. system according to claim 1, which is characterized in that the frequency modulation bypasses (1) and includes：
First frequency modulation bypasses (11), is provided with the first frequency modulation bypass valve (A1), the first frequency modulation bypass valve
(A1) input terminal is connected to the input terminal of the high pressure turbine by regulating valve (P1) on the high pressure turbine by (107) of the unit (100),
The output end of the first frequency modulation bypass valve (A1) is communicated to the reheating hot arc of the reheater (1011) of the unit (100)
(1011a) or it is communicated to high pressure heat exchangers for district heating (301) by spray desuperheating pressure reducer (3)；And/or
4th frequency modulation bypasses (14), is provided with the 4th frequency modulation bypass valve (A3), the 4th frequency modulation bypass valve
(A3) input terminal is connected to the input terminal of the low voltage bypass regulating valve (P2) on the low voltage bypass (108) of the unit (100),
The output end of the 4th frequency modulation bypass valve (A3) is communicated to the condenser (104) or oxygen-eliminating device of the unit (100)
(105), or the output end of the 4th frequency modulation bypass valve (A3) is communicated to low pressure heat exchangers for district heating (302).
3. system according to claim 2, which is characterized in that the frequency modulation bypasses (1) and further includes：
Second frequency modulation bypasses (12), is provided with spray desuperheating pressure reducer (3), the input of the spray desuperheating pressure reducer (3)
End is connected to the output end of the first frequency modulation bypass valve (A1), the output end connection of the spray desuperheating pressure reducer (3)
To the reheater (1011) of the steam boiler (101) of the unit (100) reheating cold section (1011b) or be communicated to the height
Press heat exchangers for district heating (301).
4. system according to claim 2, which is characterized in that
The initial position of the first frequency modulation bypass valve (A1) and/or the 4th frequency modulation bypass valve (A3) is arranged in centre
Aperture.
5. system according to claim 2, which is characterized in that
The first frequency modulation bypass valve (A1) and/or the 4th frequency modulation bypass valve (A3), which use, pneumatically or hydraulically executes machine
What the quick aperture variation of structure, the first frequency modulation bypass valve (A1) and/or the 4th frequency modulation bypass valve (A3) was adjusted
Precision, speed and response time meet the needs of unit frequency modulation.
6. system according to claim 1, which is characterized in that the frequency modulation bypasses (1) and includes：
Third frequency modulation bypasses (13), is provided with third frequency modulation bypass valve (A2) and spray desuperheating pressure reducer (3), described
The input terminal of third frequency modulation bypass valve (A2) is adjusted with the high pressure turbine by the high pressure turbine by (107) of the unit (100)
The input terminal of valve (P1) is connected to, and the output end of the third frequency modulation bypass valve (A2) is communicated to the spray desuperheating pressure reducer
(3) input terminal, the output end of the spray desuperheating pressure reducer (3) are communicated to the steam boiler (101) of the unit (100)
The reheating cold section (1011b) of reheater (1011) is communicated to high pressure heat exchangers for district heating (301)；And/or
4th frequency modulation bypasses (14), is provided with the 4th frequency modulation bypass valve (A3), the 4th frequency modulation bypass valve
(A3) input terminal is connected to the input terminal of the low voltage bypass regulating valve (P2) on the low voltage bypass (108) of the unit (100),
The output end of the 4th frequency modulation bypass valve (A3) is communicated to the condenser (104) or oxygen-eliminating device of the unit (100)
(105), or the output end of the 4th frequency modulation bypass valve (A3) is communicated to low pressure heat exchangers for district heating (302).
7. system according to claim 6, which is characterized in that
The initial position of the third frequency modulation bypass valve (A2) and/or the 4th frequency modulation bypass valve (A3) is arranged in centre
Aperture.
8. system according to claim 6, which is characterized in that
The third frequency modulation bypass valve (A2) and/or the 4th frequency modulation bypass valve (A3), which use, pneumatically or hydraulically executes machine
What the quick aperture variation of structure, the third frequency modulation bypass valve (A2) and/or the 4th frequency modulation bypass valve (A3) was adjusted
Precision, speed and response time meet the needs of unit frequency modulation.
9. system according to claim 6, which is characterized in that
The third frequency modulation bypass valve (A2) is integral type or split structure with spray desuperheating pressure reducer (3)；And/or
The 4th frequency modulation bypass valve (A3) is integral type or split structure with spray desuperheating pressure reducer (3).
10. the system according to claim 2 or 6, which is characterized in that
It is additionally provided with spray desuperheating pressure reducer (3) on the 4th frequency modulation bypass (14)；
The input terminal of the spray desuperheating pressure reducer (3) is connected to the output end of the 4th frequency modulation bypass valve (A3),
Output end is communicated to the condenser (104) or oxygen-eliminating device (105) of the unit (100), or its output end is communicated to low pressure heat
Net heater (302).
11. system according to claim 1, which is characterized in that
It is described when the input terminal of the frequency modulation bypass (1) is connected to the input terminal of the high pressure turbine by (107) of the unit (100)
The range of flow that frequency modulation bypasses the pipeline of (1) is the 1%~50% of the metered flow of the pipeline of the high pressure turbine by (107)；With/
Or
The input terminal of the frequency modulation bypass (1) is connected to the input terminal of low voltage bypass (108) low voltage bypass of the unit (100)
When, the range of flow of the pipeline of frequency modulation bypass (1) be the metered flow of the pipeline of the low voltage bypass (108) 1%~
50%.
12. system according to claim 1, which is characterized in that the frequency modulation bypass control device (2) includes：
Acquisition module (21) is used to obtain frequency modulation demand electric load Q1 and unit of the current electric grid (200) to unit (100)
(100) actual power load Q2；
Comparison module (22) is used for frequency modulation demand electric load Q1 and unit to unit (100) by the current electric grid (200)
(100) actual power load Q2 is compared, and obtains comparison result；
Matching module (23) is used to, according to the comparison result, be matched to default control corresponding with the comparison result
Strategy；
Control module (24) is used to export control parameter according to the predetermined control strategy, to control the unit (100)
Actual power load Q2.
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| CN201721885460.2U CN208073572U (en) | 2017-12-28 | 2017-12-28 | A kind of power grid frequency modulation system based on frequency modulation bypass |
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| CN201721885460.2U CN208073572U (en) | 2017-12-28 | 2017-12-28 | A kind of power grid frequency modulation system based on frequency modulation bypass |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263505A (en) * | 2021-11-29 | 2022-04-01 | 山东中实易通集团有限公司 | System and method for improving primary frequency modulation performance of reheating unit |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263505A (en) * | 2021-11-29 | 2022-04-01 | 山东中实易通集团有限公司 | System and method for improving primary frequency modulation performance of reheating unit |
| CN114263505B (en) * | 2021-11-29 | 2023-12-12 | 山东中实易通集团有限公司 | System and method for improving primary frequency modulation performance of reheat unit |
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