CN108223245A - A kind of overall process quantitative estimation method of turbine-generator units water power calculation evaluation - Google Patents
A kind of overall process quantitative estimation method of turbine-generator units water power calculation evaluation Download PDFInfo
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Abstract
The present invention relates to a kind of overall process quantitative estimation methods of turbine-generator units water power calculation evaluation.It needs to study a kind of turbine-generator units water power calculation evaluation method at present.Step of the present invention is as follows：One：The measured data of computer supervisory control system, waterpower scheduling automation, unit ultrasonic flowmeter is read, obtains the operating status and real-time running data of turbine-generator units；Two：Operating status based on unit, the conversion process decomposition of electric energy can be arrived by carrying out the machine water excessively of unit, determine that unit is crossed the conversion of machine hydraulic energy and formed；Three：The computation model of each section energy that machine water can convert was established, carries out the real-time calculating of energy；Four：Based on real-time result of calculation, the unit that statistics calculates specific time period crosses each section energy that machine water can convert, and carries out the quantitative assessment of unit water power calculation conversion.The present invention realizes the immediate assessment and after-action review of unit performance efficiency, and the safety and economic operation in power station is instructed to work.
Description
Technical field
The present invention relates to a kind of overall process quantitative estimation methods of turbine-generator units water power calculation evaluation, belong to waterpower hair
Electro-technical field.
Background technology
With the unit of the fast development of hydropower technology and equipment manufacturing technology, at present newly-built power station turbine-generator units
Capacity and size are all relatively large.With the growth of run time after the operation of unit, the abrasion of unit flow passage components, diversion culvert
The factors such as siltation, cause the decline of the energy conversion performance of unit.The reduction of the unit energy conversion performance of large capacity, results in
Significant hydraulic energy of hydropower station utilizes loss.
At present, for the quantitative estimation method of Hydropower Plant energy utilization evaluation main effective percentage, water consumption rate, power station water
Energy utilization rate etc..Efficiency is an instantaneous calculated value, is influenced by unit operation operating mode, it is difficult to the energy utilization in a period
Situation is assessed, at the same efficiency just for generating equipment in itself, do not consider energy loss caused by the diversion culvert of power station.
Water consumption rate has reacted power station or the energy conversion situation in the unit period, but is unable to the reason of reaction energy loses.Power station
Waterpower utilization rate has reacted the water power calculation situation of power station entirety, it is impossible to react the performance efficiency of particular rack.
Therefore, it is necessary to study a kind of turbine-generator units water power calculation evaluation method, power station unit operation work is considered
Condition, diversion culvert, equipment performance etc., assess the unit efficiency utilization power of different periods, and can carry out lateral, longitudinal direction comparison
Analysis provides valuable information to policymaker.Existing such as publication date is on 03 23rd, 2016, Publication No.
In the Chinese patent of CN105429184A, a kind of disclosed overall process quantitative estimation method of wind-powered electricity generation priority scheduling evaluation；And
Publication date is on February 10th, 2016, and in the Chinese patent of Publication No. CN105320992A, a kind of disclosed electric system is standby
With quantitative estimation method, it is not suitable in the evaluation of turbine-generator units water power calculation.
Invention content
It is an object of the invention to overcome above-mentioned deficiency in the prior art, and provide a kind of turbine-generator units water
The overall process quantitative estimation method of energy Utilization assessment, realizes the immediate assessment and after-action review of unit performance efficiency, instructs power station
Safety and economic operation work.
Technical solution is used by the present invention solves the above problems：The full mistake of turbine-generator units water power calculation evaluation
The characteristics of journey quantitative estimation method, is：Include the following steps：
Step 1：Read the actual measurement of computer supervisory control system, waterpower scheduling automation, unit ultrasonic flowmeter
Data obtain the operating status and real-time running data of turbine-generator units, and basic information is provided for evaluation；
Step 2：Operating status based on unit, the conversion process decomposition of electric energy can be arrived by carrying out the machine water excessively of unit, be determined
Unit is crossed the conversion of machine hydraulic energy and is formed, and the qualitative assessment for water power calculation provides foundation；
Step 3：The computation model of each section energy that machine water can convert was established, carries out the real-time calculating of energy；
Step 4：Based on real-time result of calculation, the unit that statistics calculates specific time period crosses each section energy that machine water can convert
Amount carries out the quantitative assessment of unit water power calculation conversion.
Preferably, in step 1 of the present invention, the operating status includes：Power generation state, idle running state, is stopped at unloaded state
Machine state, phase modulation state and indefinite state, water power calculation quantitative evaluation only consider generate electricity state and shutdown state.
Preferably, in step 1 of the present invention, the real-time running data includes：Unit active power, unit tire out
It counts generated energy, upstream water level, the level of tail water, cross machine flow, Weng'an biota and draft tube outlet pressure.
Preferably, in step 2 of the present invention, the energy conversion forms as follows：
When unit is in power generation state, unit, which crosses machine water, can be converted into diversion off-energy, intrinsic off-energy, performance damage
Disability amount and actual power generation；
When unit, which is in, shuts down state, unit, which crosses machine water, can be converted into guide vane water loss energy.
Preferably, in step 3 of the present invention, the computation model includes the following steps：
Judge the operating status of unit；
According to the operating status of unit, calculate unit and cross machine water energy and conversion energy；
It calculates with 1 minute as calculating cycle, is calculated in the calculating cycle period using integral way.
Preferably, in step 4 of the present invention, the specific time period includes：Hour, day, the moon, year.
Preferably, in step 4 of the present invention, the content of the quantitative assessment is to count the unit water of calculation interval
It can utilization rate index.
Preferably, in step 2 of the present invention, unit crosses the total water of theory that machine water can be input unit in the period
Can, formula (1) is shown in calculating,
In formula：
Esn：Cross machine water energy, unit：kW·h；
ρ：Water density, unit：kg/m3；
g：Acceleration of gravity, unit：m/s2；
Hg：Unit generation gross head, unit：M is that power station water levels of upstream and downstream is poor；
Qgj：Unit crosses machine flow, unit：m3/ s is unit ultrasonic flow rate measurement value；
t0：The initial time of calculation interval；
t1：The termination time of calculation interval；
When unit is in power generation state, the machine water excessively of unit can be decomposed into diversion off-energy, intrinsic off-energy, performance
Off-energy and actual power generation；
Formula (2) is shown in electric flux of the unit generation amount for unit output in the period, calculating,
In formula：
Esn：Unit generation amount, unit：kW·h；
Pdq：Unit active power, unit：kW；
Unit performance off-energy is that unit is since self performance declines in the period, caused by efficiency off-design efficiency
Formula (3) is shown in energy loss, calculating,
In formula：
Exs：Performance loss energy, unit：kW·h；
H：Unit generation working head, unit：M, by Weng'an biota, draft tube outlet pressure and spiral case inlet section
Obtained by flow relocity calculation；
ηsl-sh：Hydraulic turbine actual efficiency, unit：%；
ηsl-sj：Design of Hydraulic Turbine efficiency, unit：% is operated by the current operating head polishing of unit, load and Design of Hydraulic Turbine
Characteristic curve determines；
ηfd：Generator actual efficiency, unit：%, it is bent by the current operating head polishing of unit, load and generator design efficiency
Line determines；
Qfd：Unit generation flow, unit：m3/ s when unit is run mode, crosses machine flow, when unit is equal to unit
During inoperative state, equal to 0；
The intrinsic off-energy of unit is damaged for the period interior energy being not achieved caused by 100% unit design efficiency itself
It loses, formula (4) is shown in calculating,
In formula：
Esn：The intrinsic off-energy of unit, unit：kW·h；
Unit diversion off-energy is energy loss caused by the head loss caused by diversion culvert in the period, is calculated
See formula (5),
In formula：
Eys：Unit diversion off-energy, unit：kW·h；
ΔH：Unit generation head loss, unit：M is the difference of gross head and working head；
When unit, which is in, shuts down state, the machine water of crossing of unit can be guide vane water loss energy；
Unit guide vane water loss energy is interior due to energy loss caused by guide vane leak for the period, and formula (6) is shown in calculating,
In formula：
Edl：Unit guide vane water loss energy, unit：kW·h；
Qdl：Unit guide vane leak flow, unit：m3/s；When unit is shuts down state, machine flow is crossed equal to unit, works as machine
When group is non-shutdown state, equal to 0.
Preferably, the present invention realizes the operating status and operation data of turbine-generator units using computer supervisory control system
Acquisition, processing, data information is sent to turbine-generator units water power calculation evaluation system；Waterpower scheduling automation realizes electricity
Stand water levels of upstream and downstream hydrographic information acquisition, processing, by data information be sent to turbine-generator units water power calculation evaluation system
System；Turbine-generator units water power calculation evaluation system by the information of acquisition, real-time computer group energy stream and waterpower utilization rate,
And periodically result of calculation is counted as day evaluation, week evaluation, is evaluated the moon, year evaluation result；Turbine-generator units water power calculation is commented
Regular evaluation result is sent to water power diagnostic system, inspection base, automatic power generation system and region class by valency system should
With system, to provide foundation and reference data；Automatic electricity generation control system supports the on-line tuning of power station unit sharing of load, real
Now to the closed-loop control of turbine-generator units, system is by the unit efficiency evaluation of acquisition as a result, periodically Load adjustment distributes plan
Slightly.
Compared with prior art, the present invention haing the following advantages and effect：The present invention is with Supervisory Computer Control System For Hydroelectic Power Plant
Based on waterpower scheduling automation, data unit operation is obtained in real time, by establishing the energy stream calculation under each state of unit
Model is realized the instant and subsequent overall process quantitative evaluation analysis of unit performance efficiency, is made for power station operation plan, machine
The control of group real time execution, repair and maintenance plan arrangement etc. provide foundation and reference data, instruct power station production run work, are promoted
The safety of power station operation and economy.
Description of the drawings
Fig. 1 is the system of the overall process quantitative estimation method that turbine-generator units water power calculation is evaluated in the embodiment of the present invention
Structure diagram.
Fig. 2 is the flow of the overall process quantitative estimation method that turbine-generator units water power calculation is evaluated in the embodiment of the present invention
Schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawings and pass through embodiment the present invention is described in further detail, following embodiment is to this hair
Bright explanation and the invention is not limited in following embodiments.
Embodiment.
Referring to Fig. 1 to Fig. 2, the computer supervisory control system in the present embodiment realizes the operating status and fortune of turbine-generator units
Acquisition, the processing of row data, turbine-generator units water power calculation evaluation system is sent to by data information.Waterpower scheduling automation
It realizes acquisition, the processing of the hydrographic informations such as power station water levels of upstream and downstream, data information is sent to turbine-generator units water power calculation
Evaluation system.Turbine-generator units water power calculation evaluation system passes through the information of acquisition, real-time computer group energy stream and water energy
Utilization rate, and be periodically day evaluation, week evaluation, moon evaluation, year evaluation result by result of calculation statistics.Turbine-generator units water energy
Regular evaluation result is sent to water power diagnostic system, inspection base, automatic power generation system and area by Utilization assessment system
Domain grade application system, foundation and reference data are provided for other related systems.Automatic electricity generation control system mainly supports power station machine
The on-line tuning of group sharing of load, realizes the closed-loop control to turbine-generator units, the unit efficiency evaluation that system passes through acquisition
As a result, regular Load adjustment allocation strategy.
The overall process quantitative estimation method of turbine-generator units water power calculation evaluation in the present embodiment includes the following steps：
Step 1：Fetch water power station computer monitoring system, waterpower scheduling automation, unit ultrasonic flowmeter actual measurement number
According to obtaining the operating status and real-time running data of turbine-generator units, basic information provided for evaluation.
Operating status includes：Generate electricity state, unloaded state, idle running state, shutdown state, phase modulation state, indefinite state, and water power calculation quantization is commented
Estimate and only consider power generation state and shutdown state.
Real-time running data includes：Unit active power, upstream water level, the level of tail water, crosses machine stream at unit the accumulative total of generating electricity
Amount, Weng'an biota, draft tube outlet pressure.
Step 2：Operating status based on unit, the conversion process decomposition of electric energy can be arrived by carrying out machine water, determine unit mistake
The conversion of machine hydraulic energy is formed, and the qualitative assessment for water power calculation provides foundation.
Unit crosses the total water energy of theory that machine water can be input unit in the period, and formula (1) is shown in calculating,
In formula：
Esn：Cross machine water energy, unit：kW·h；
ρ：Water density, unit：kg/m3；
g：Acceleration of gravity, unit：m/s2；
Hg：Unit generation gross head, unit：M is that power station water levels of upstream and downstream is poor；
Qgj：Unit crosses machine flow, unit：m3/ s is unit ultrasonic flow rate measurement value；
t0：The initial time of calculation interval；
t1：The termination time of calculation interval；
When unit is in power generation state, unit, which crosses machine water, can be decomposed into diversion off-energy, intrinsic off-energy, performance loss
Energy, actual power generation；
Formula (2) is shown in electric flux of the unit generation amount for unit output in the period, calculating,
In formula：
Esn：Unit generation amount, unit：kW·h；
Pdq：Unit active power, unit：kW；
Unit performance off-energy is that unit is since self performance declines in the period, caused by efficiency off-design efficiency
Formula (3) is shown in energy loss, calculating,
In formula：
Exs：Performance loss energy, unit：kW·h；
H：Unit generation working head, unit：M, by Weng'an biota, draft tube outlet pressure and spiral case inlet section
Flow velocity etc. calculates gained；
ηsl-sh：Hydraulic turbine actual efficiency, unit：%；
ηsl-sj：Design of Hydraulic Turbine efficiency, unit：% is operated by the current operating head polishing of unit, load and Design of Hydraulic Turbine
Characteristic curve determines；
ηfd：Generator actual efficiency, unit：%, it is bent by the current operating head polishing of unit, load and generator design efficiency
Line determines；
Qfd：Unit generation flow, unit：m3/ s, when unit be run mode, cross machine flow equal to unit, when unit be its
His state, equal to 0；
The intrinsic off-energy of unit is damaged for the period interior energy being not achieved caused by 100% unit design efficiency itself
It loses, formula (4) is shown in calculating,
In formula：
Esn：The intrinsic off-energy of unit, unit：kW·h；
Unit diversion off-energy is energy loss caused by the head loss caused by diversion culvert in the period, is calculated
See formula (5),
In formula：
Eys：Unit diversion off-energy, unit：kW·h；
ΔH：Unit generation head loss, unit：M is the difference of gross head and working head；
State is shut down when unit is in, it can be guide vane water loss energy that unit, which crosses machine water,；
Unit guide vane water loss energy is interior due to energy loss caused by guide vane leak for the period, and formula (6) is shown in calculating,
In formula：
Edl：Unit guide vane water loss energy, unit：kW·h；
Qdl：Unit guide vane leak flow, unit：m3/s；When unit for shut down state, cross machine flow equal to unit, work as unit
For other states, equal to 0.
Step 3：The computation model of each section energy that machine water can convert was established, carries out the real-time calculating of energy.It calculates
Model includes the following steps：
Judge the operating status of unit；
According to operating states of the units, calculate unit and cross machine water energy and conversion energy；
It calculates with 1 minute as calculating cycle, is calculated in the calculating cycle period using integral way.
Step 4：Based on real-time result of calculation, the unit that statistics calculates specific time period crosses each section energy that machine water can convert
Amount carries out the quantitative assessment of unit water power calculation conversion.
Specific time period includes：Hour, day, the moon, year.
Evaluation content is to count the unit waterpower utilization rate index of calculation interval.
Unit waterpower utilization rate crosses the ratio of machine water energy for unit actual power generation with unit.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of parts and components is named
Claiming etc. can be different, described in this specification above content is only to structure example explanation of the present invention.It is all according to
According to equivalence changes or simple change that construction, feature and the principle described in inventional idea of the present invention are done, it is included in this hair
In the protection domain of bright patent.Those skilled in the art can do described specific embodiment various
The modification of various kinds or supplement substitute in a similar way, without departing from structure of the invention or surmount present claims
Range defined in book, is within the scope of protection of the invention.
Claims (9)
1. a kind of overall process quantitative estimation method of turbine-generator units water power calculation evaluation, it is characterised in that：Including walking as follows
Suddenly：
Step 1：Read the actual measurement number of computer supervisory control system, waterpower scheduling automation, unit ultrasonic flowmeter
According to obtaining the operating status and real-time running data of turbine-generator units, basic information provided for evaluation；
Step 2：Operating status based on unit, the conversion process decomposition of electric energy can be arrived by carrying out the machine water excessively of unit, determine unit
It crosses the conversion of machine hydraulic energy to form, the qualitative assessment for water power calculation provides foundation；
Step 3：The computation model of each section energy that machine water can convert was established, carries out the real-time calculating of energy；
Step 4：Based on real-time result of calculation, the unit that statistics calculates specific time period crosses each section energy that machine water can convert, into
The quantitative assessment of row unit water power calculation conversion.
2. the overall process quantitative estimation method of turbine-generator units water power calculation evaluation according to claim 1, feature
It is：In the step 1, the operating status includes：Generate electricity state, unloaded state, idle running state, shut down state, phase modulation state and indefinite
State.
3. the overall process quantitative estimation method of turbine-generator units water power calculation evaluation according to claim 1, feature
It is：In the step 1, the real-time running data includes：Unit active power, unit the accumulative total of generating electricity, upstream water level,
The level of tail water crosses machine flow, Weng'an biota and draft tube outlet pressure.
4. the overall process quantitative estimation method of turbine-generator units water power calculation evaluation according to claim 1, feature
It is：In the step 2, the energy conversion forms as follows：
When unit is in power generation state, unit, which crosses machine water, can be converted into diversion off-energy, intrinsic off-energy, performance loss energy
Amount and actual power generation；
When unit, which is in, shuts down state, unit, which crosses machine water, can be converted into guide vane water loss energy.
5. the overall process quantitative estimation method of turbine-generator units water power calculation evaluation according to claim 1, feature
It is：In the step 3, the computation model includes the following steps：
Judge the operating status of unit；
According to the operating status of unit, calculate unit and cross machine water energy and conversion energy；
It calculates with 1 minute as calculating cycle, is calculated in the calculating cycle period using integral way.
6. the overall process quantitative estimation method of turbine-generator units water power calculation evaluation according to claim 1, feature
It is：In the step 4, the specific time period includes：Hour, day, the moon, year.
7. the overall process quantitative estimation method of turbine-generator units water power calculation evaluation according to claim 1, feature
It is：In the step 4, the content of the quantitative assessment is to count the unit waterpower utilization rate index of calculation interval.
8. the overall process quantitative estimation method of turbine-generator units water power calculation evaluation according to claim 1, feature
It is：In the step 2, unit crosses the total water energy of theory that machine water can be input unit in the period, and formula (1) is shown in calculating,
In formula：
Esn：Cross machine water energy, unit：kW·h；
ρ：Water density, unit：kg/m3；
g：Acceleration of gravity, unit：m/s2；
Hg：Unit generation gross head, unit：M is that power station water levels of upstream and downstream is poor；
Qgj：Unit crosses machine flow, unit：m3/ s is unit ultrasonic flow rate measurement value；
t0：The initial time of calculation interval；
t1：The termination time of calculation interval；
When unit is in power generation state, the machine water excessively of unit can be decomposed into diversion off-energy, intrinsic off-energy, performance loss
Energy and actual power generation；
Formula (2) is shown in electric flux of the unit generation amount for unit output in the period, calculating,
In formula：
Esn：Unit generation amount, unit：kW·h；
Pdq：Unit active power, unit：kW；
Unit performance off-energy is that unit is since self performance declines in the period, the energy caused by efficiency off-design efficiency
Formula (3) is shown in loss, calculating,
In formula：
Exs：Performance loss energy, unit：kW·h；
H：Unit generation working head, unit：M, by Weng'an biota, draft tube outlet pressure and spiral case inlet cross-sectional flow
Calculate gained；
ηsl-sh：Hydraulic turbine actual efficiency, unit：%；
ηsl-sj：Design of Hydraulic Turbine efficiency, unit：%, by the current operating head polishing of unit, load and Design of Hydraulic Turbine service performance
Curve determines；
ηfd：Generator actual efficiency, unit：%, it is true by the current operating head polishing of unit, load and generator design efficiency curve
It is fixed；
Qfd：Unit generation flow, unit：m3When unit is run mode, machine flow is crossed equal to unit by/s, when unit is non-fortune
During row state, equal to 0；
The intrinsic off-energy of unit in the period since the energy loss caused by 100% is not achieved in unit design efficiency itself,
Formula (4) is shown in calculating,
In formula：
Esn：The intrinsic off-energy of unit, unit：kW·h；
Unit diversion off-energy is that formula is shown in energy loss caused by the head loss caused by diversion culvert, calculating in the period
(5),
In formula：
Eys：Unit diversion off-energy, unit：kW·h；
ΔH：Unit generation head loss, unit：M is the difference of gross head and working head；
When unit, which is in, shuts down state, the machine water of crossing of unit can be guide vane water loss energy；
Unit guide vane water loss energy is interior due to energy loss caused by guide vane leak for the period, and formula (6) is shown in calculating,
In formula：
Edl：Unit guide vane water loss energy, unit：kW·h；
Qdl：Unit guide vane leak flow, unit：m3/s；When unit is shuts down state, machine flow is crossed equal to unit, when unit is
During non-shutdown state, equal to 0.
9. the overall process quantitative estimation method of turbine-generator units water power calculation evaluation according to claim 1, feature
It is：Acquisition, the processing of the operating status and operation data of turbine-generator units are realized using computer supervisory control system, by data
Information is sent to turbine-generator units water power calculation evaluation system；Waterpower scheduling automation realizes the hydrology of power station water levels of upstream and downstream
Acquisition, the processing of information, turbine-generator units water power calculation evaluation system is sent to by data information；Turbine-generator units water energy
Utilization assessment system is periodically united result of calculation by the information of acquisition, real-time computer group energy stream and waterpower utilization rate
It is calculated as day evaluation, week evaluation, moon evaluation, year evaluation result；Turbine-generator units water power calculation evaluation system will periodically evaluate knot
Fruit is sent to water power diagnostic system, inspection base, automatic power generation system and region class application system, with provide foundation and
Reference data；Automatic electricity generation control system supports the on-line tuning of power station unit sharing of load, realizes to turbine-generator units
Closed-loop control, system is by the unit efficiency evaluation of acquisition as a result, regular Load adjustment allocation strategy.
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