CN105869063A - Economical monitoring device and method for adjustment of operation modes of circulating water system of power station - Google Patents
Economical monitoring device and method for adjustment of operation modes of circulating water system of power station Download PDFInfo
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Abstract
The invention provides an economical monitoring device and method for adjustment of operation modes of a circulating water system of a power station. The device comprises a power measuring device, an absolute pressure measuring device, a data acquiring unit and a calculating and displaying unit. The power measuring device comprises a first power transmitter (1), a second power transmitter (2), a third power transmitter (3), a fourth power transmitter (4) and a fifth power transmitter (5), which are used for measuring power of a turbo-generator and power of four circulation water pump motors. The absolute pressure measuring device comprises a first absolute pressure transmitter (6) and a second pressure transmitter (7) which are used for measuring high/low pressure condenser pressure of a turbine. According to the invention, the monitoring device is used for acquiring onsite real-time data so as to calculate economic dispatch operation indexes of a circulation water system. Thus, the system is simple; measurement and calculation results are precise; actual energy conservation results before and after adjustment of operation modes of the circulation water system can be directly displayed; and requirements of economic operation of a power station are satisfied.
Description
Technical field
The present invention relates to a kind of Circulating-Water System in Power Station method of operation adjusting economy property monitoring device and method, belong to
Power plant auxiliary machine running technology field.
Background technology
Circulation is the important component part of power station steam turbine group, and its consumed electric energy accounts for steamer and sends out
About the 1.0% of group of motors generated energy.Principal tunable as turbine condenser pressure saves factor, rationally selects
Select the method for operation of circulation, to saving station service power consumption rate, improving power station heat-economy important in inhibiting.
At present, the circulation optimizing operating mode scheme that the widely used test unit in power station is recommended carrys out guide field
Produce.It is known that Steam Turbine and auxiliary device running status, cooling water quality, environment temperature etc.
Boundary condition is the most complicated and changeable, and this makes the prioritization scheme drawn based on experimental condition may be in certain feelings
Do not correspond with on-site actual situations under shape, it is contemplated that energy-saving potential will be weakened.Meanwhile, rate for incorporation into the power network with
The irregular fluctuation of mark coal unit price also directly affects the energy-conservation effect that the Circulating-Water System in Power Station method of operation adjusts
Really.How to monitor the circulation method of operation and adjust forward and backward economy situation of change, be power station circulation
Water system operational management problem demanding prompt solution.
Summary of the invention
The technical problem that the present invention intends to solve is to provide that a kind of system is simple and direct, stable, power station recirculated water accurately
System operation mode adjusting economy property monitoring device and method.
The technical scheme is that, a kind of Circulating-Water System in Power Station method of operation adjusting economy property monitoring device,
Including power-measuring device, absolute pressure measurement apparatus, data acquisition unit and calculating and display unit.
Described power-measuring device includes measuring turbine generator acc power and four circulation-water pump electric machine power respectively
First power transducer the 1, second power transducer the 2, the 3rd power transducer the 3, the 4th power transducer
4, the 5th power transducer 5；Described absolute pressure measurement apparatus includes that measuring steam turbine high and low pressure respectively coagulates
First absolute pressure transducer the 6, second absolute pressure transducer 7 of vapour device pressure；Described calculating and display are single
Unit comprises circulation economic load dispatching operating index calculation procedure and interface；Described first power transducer 1,
Second power transducer the 2, the 3rd power transducer the 3, the 4th power transducer the 4, the 5th power transducer 5,
First absolute pressure transducer 6 and the second absolute pressure transducer 7 connect the input of data acquisition unit respectively
End；The output of described data acquisition unit connects calculating and the input of display unit.
The precision of all power transducers is ± 0.2%；The precision of all absolute pressure transducers is ±
0.1%；The precision of data acquisition unit is ± 0.05%, and is furnished with standard RS232/485/USB communication interface,
Support standard MODBUS communications protocol, supports the multiple communication modes such as wired connection, LAN connection.
A kind of Circulating-Water System in Power Station adjusting economy property of method of operation monitoring monitoring method is entered as steps described below
OK:
1) described monitoring device of stating correctly is mounted and connected；Gather steam turbine generator and four recirculated waters
The power signal of pump motor and high pressure, low pressure condenser pressure signal, and the signal of collection is passed through data acquisition
Unit is sent to calculate and display unit；
2) according to the signal gathered to circulation economic load dispatching operating index entrance calculation procedure:
Average condenser pressure before the circulation method of operation adjusts is:
In formula,Be respectively the circulation method of operation adjust before average condenser pressure,
High pressure condenser pressure, low pressure condenser pressure, unit kPa；
Average condenser pressure after the circulation method of operation adjusts is:
In formula,Be respectively the circulation method of operation adjust after average condenser pressure,
High pressure condenser pressure, low pressure condenser pressure, unit kPa；
The circulation method of operation adjusts the difference of forward and backward average condenser pressure:
In formula,The difference of forward and backward average condenser pressure, unit is adjusted for the circulation method of operation
kPa；
For using the circulation of Expanding Unit Element System:
Before the circulation method of operation adjusts, single unit consumed water circulating pump power is:
In formula, ∑ W0、It is respectively before the circulation method of operation adjusts single
Platform unit consumed water circulating pump power and four circulation-water pump electric machine power, unit kW；
After the circulation method of operation adjusts, single unit consumed water circulating pump power is:
In formula, ∑ W1、It is respectively after the circulation method of operation adjusts single
Platform unit consumed water circulating pump power and four circulation-water pump electric machine power, unit kW；
The circulation method of operation adjusts forward and backward single unit consumed water circulating pump power difference:
Δ ∑ W=∑ W1-∑W2 (6)
In formula, Δ ∑ W adjusts forward and backward single unit by the circulation method of operation and is consumed water circulating pump merit
Rate difference, unit kW；
The unit that condenser pressure unit change amount under matching typical condition difference turbine generator acc power is corresponding
The amplitude of variation of gross coal consumption rate is:
δ B=f (N, p) * 10-2*g(N) (7)
In formula, δ B is the amplitude of variation of unit generation coal consumption corresponding to condenser pressure unit change amount, and unit is
g/(kPa*kW.h)；(N p) is the condenser pressure correction factor under different turbine generator acc power to function f
Fitting formula, unit is %/(kPa)；Function g (N) is the gross coal consumption rate under different turbine generator acc power
Fitting formula, unit is g/ (kW.h)；N is turbine generator acc power, and unit is kW；P is condensing
Device pressure, unit kPa.
For Turbo-generator Set, the most aging shadow for condenser pressure correction factor of unit performance
Ringing less, but relatively big on the impact of gross coal consumption rate, this will cause machine corresponding to condenser pressure unit change amount
There is significant change in the amplitude of variation δ B of group gross coal consumption rate；Therefore, refer in the operation of circulation economic load dispatching
Can be according to regular conventional thermodynamic performance test in mark calculation procedure, matching replace gross coal consumption rate function again
g(N)。
The circulation method of operation adjusts forward and backward because of the operating cost change caused by condenser pressure change
Amount:
In formula, Δ $coal, $coalIt is respectively the circulation method of operation and adjusts forward and backward because of condenser pressure
Operating cost variable quantity caused by power change, mark coal unit price, unit is respectively unit/h, unit/t；
When mark coal unit price occur change time, should in circulation economic load dispatching operating index calculation procedure phase
$ should be revisedcoal。
The circulation method of operation adjusts caused by forward and backward single unit consumed water circulating pump changed power
Operating cost variable quantity:
Δ $pump=Δ ∑ W*$elec (9)
Δ $ in formulapump, $elecIt is respectively the circulation method of operation and adjusts the consumed circulation of forward and backward single unit
Operating cost variable quantity caused by pump power change, power supply price, unit is respectively unit/h, unit
/(kW.h)；
When rate for incorporation into the power network occur change time, should in circulation economic load dispatching operating index calculation procedure phase
$ should be revisedelec。
The circulation method of operation forward and backward comprehensive variable quantity of unit operation cost of adjustment:
Δ $=Δ $coal+ Δ $pump (10)
In formula, the Δ $ circulation method of operation adjusts the forward and backward comprehensive variable quantity of unit operation cost, and unit is
Unit/h.
3) if comprehensive variation delta $ of operating cost is negative, representing that cost of electricity-generating declines, power station economy improves；
If comprehensive variation delta $ of operating cost is just, representing that cost of electricity-generating rises, power station economy reduces；Meanwhile,
Adjust forward and backward in the method for operation, keep Turbo-generator Set power constant as far as possible.
The invention has the beneficial effects as follows, show that the circulation method of operation adjusts forward and backward reality intuitively
Energy-saving effect and the amount of money are how many, and system is simple and direct, survey calculation result is stable, reliable, can be to instruct recirculated water
Systematic economy runs provides foundation, meets the needs of Power Plant Energy Saving, economical operation.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the present invention；
Fig. 2 is the calculation procedure interface of the present invention.
Detailed description of the invention
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings:
Two ultra supercritical 700MW Turbo-generator Set circulations of certain power plant use Expanding Unit Element System circulation
Water system, is configured with four 92LKSA-23.8 type water circulating pumps altogether.For reducing unit generation cost, should
Factory's consignment test unit completes No. 1 unit circulation economic load dispatching test, and pushes away according to test unit
Recommend circulation optimizing operating mode scheme and carry out guide field production.Exist for accurately calculating assay optimization scheme
Concrete energy-saving effect in actual moving process, improves circulation operation and management level, is badly in need of exploitation one
The set circulation method of operation adjusting economy property monitoring device.
The present embodiment one Circulating-Water System in Power Station method of operation adjusting economy property monitoring device and method include merit
Rate measurement apparatus, absolute pressure measurement apparatus, data acquisition unit and calculating and display unit.Power measurement
Device includes the first power transducer measuring turbine generator acc power and four circulation-water pump electric machine power respectively
1, the second power transducer the 2, the 3rd power transducer the 3, the 4th power transducer the 4, the 5th power transducer
5。
The absolute pressure measurement apparatus of the present embodiment includes measuring steam turbine high and low pressure condenser pressure respectively
First absolute pressure transducer the 6, second absolute pressure transducer 7；Calculate and display unit comprises circulating water
System economic load dispatching operating index calculation procedure and interface；First power transducer the 1, second power transducer 2,
3rd power transducer the 3, the 4th power transducer the 4, the 5th power transducer the 5, first absolute pressure pick-up
Device 6 and the second absolute pressure transducer 7 connect the input of data acquisition unit respectively；Data acquisition unit
Output connects calculating and the input of display unit.
In the present embodiment, the precision of power transducer is ± 0.2%；The precision of absolute pressure transducer is ± 0.1%；
The precision of data acquisition unit is ± 0.05%, and is furnished with standard RS232/485/USB communication interface, supports mark
Quasi-MODBUS communications protocol, supports the multiple communication modes such as wired connection, LAN connection.
The calculating of the present embodiment and display unit are notebook computer or host computer and display.
The notebook computer of the present embodiment or host computer are mounted with circulation economic load dispatching operating index meter
Calculation program and interface.
The power transducer of the present embodiment, absolute pressure transducer can provide the output signal of 4～20mA, data
Collecting unit can receive the output signal of described power transducer, absolute pressure transducer；
The connecting line of the present embodiment all measurements device is fastened by bolts and inputs at described data acquisition unit
End；Between described data acquisition unit output and calculating and display unit input by usb communication line even
Connecing, communications protocol uses USB2.0；
To sum up, the method using the device of technique scheme to be monitored, carry out as steps described below:
Above-mentioned monitoring device is correctly mounted and connected；
The power letter of steam turbine generator and four circulation-water pump electric machines is gathered respectively with above-mentioned five power transducers
Number, gather high pressure, low pressure condenser pressure signal, and the letter that will gather with above-mentioned two absolute pressure transducers
Number by data acquisition unit be sent to calculate and display unit.
The present embodiment is forward and backward at recycling water formulation system operation mode, should keep Turbo-generator Set merit as far as possible
Rate is constant；After on-site parameters is stable, at price data hurdle the 1st～2 row at Fig. 2 calculation procedure interface
Input current electricity prices and mark coal unit price respectively；On-the-spot survey is inserted at data input part subfield the 3rd～15 row
Examination data；Subsequently, automatically calculate in result display field the 16th～22 guild, show that circulation is transported
Line mode adjusts forward and backward relevant parameter；Wherein, the 22nd row display circulation method of operation is forward and backward
The comprehensive variable quantity of operating cost.Illustrate: if the comprehensive variable quantity of operating cost is negative, represent that cost of electricity-generating declines,
Power station economy improves；If the comprehensive variable quantity of operating cost is just, represent that cost of electricity-generating rises, power station economy
Property reduce.
The present embodiment can be according to regular conventional thermodynamic in circulation economic load dispatching operating index calculation procedure
Performance test, again matching replace gross coal consumption rate function g (N)；When becoming occur in rate for incorporation into the power network or mark coal unit price
During change, $ can be revised accordingly on price data hurdleelecOr $coal。
Claims (3)
1. the Circulating-Water System in Power Station method of operation adjusting economy a property monitoring device, it is characterised in that: described
Device includes power-measuring device, absolute pressure measurement apparatus, data acquisition unit and calculating and display unit；
Described power-measuring device includes measuring turbine generator acc power and four circulation-water pump electric machine power respectively
The first power transducer, the second power transducer, the 3rd power transducer, the 4th power transducer and
Five power transducers；
Described absolute pressure measurement apparatus includes the first absolute pressure measuring turbine high-pressure condenser pressure respectively
Power transmitter and the second absolute pressure transducer of steam turbine low-pressure condenser pressure；
Described first power transducer, the second power transducer, the 3rd power transducer, the 4th power pick-up
Device, the 5th power transducer, the first absolute pressure transducer and the second absolute pressure transducer connect number respectively
Input according to collecting unit；
The output of described data acquisition unit connects calculating and the input of display unit；
Described calculating and display unit comprise circulation economic load dispatching operating index calculation procedure and interface.
A kind of Circulating-Water System in Power Station method of operation adjusting economy property monitoring device,
It is characterized in that: the precision of described first power transducer to the 5th power transducer is ± 0.2%；Described
The precision of the first absolute pressure transducer and the second absolute pressure transducer is ± 0.1%；Described data acquisition
The precision of unit is ± 0.05%, and is furnished with standard RS232/485/USB communication interface, supports standard MODBUS
Communications protocol, supports the multiple communication modes that wired connection, LAN connect.
3. the Circulating-Water System in Power Station method of operation adjusting economy a property monitoring method, it is characterised in that: described
Monitoring method comprises the steps:
1) above-mentioned monitoring device is correctly mounted and connected；Gather steam turbine generator and four water circulating pumps
The power signal of motor and high pressure, low pressure condenser pressure signal, and the signal gathered is passed through data acquisition list
Unit is sent to calculate and display unit；
2) machine that the condenser pressure unit change amount under matching typical condition difference turbine generator acc power is corresponding
The amplitude of variation of group gross coal consumption rate is:
δ B=f (N, p) * 10-2*g(N)
In formula, δ B is the amplitude of variation of unit generation coal consumption corresponding to condenser pressure unit change amount, unit
For g/ (kPa*kW.h)；(N p) is the condenser pressure correction system under different turbine generator acc power to function f
The fitting formula of number, unit is %/(kPa)；Function g (N) is the generating coal under different turbine generator acc power
The fitting formula of consumption, unit is g/ (kW.h)；N is turbine generator acc power, and unit is kW；P is solidifying
Vapour device pressure, unit kPa；
3) the forward and backward comprehensive variable quantity of unit operation cost of circulation method of operation adjustment is counted as the following formula
Calculate:
Δ $=Δ $coal+ Δ $pump
In formula, the Δ $ circulation method of operation adjusts the forward and backward comprehensive variable quantity of unit operation cost, single
Position is unit/h；Δ $coalFor the circulation method of operation adjust forward and backward because of condenser pressure change caused
Operating cost variable quantity, unit is unit/h；Δ $pumpFor the circulation method of operation adjust forward and backward because of
Operating cost variable quantity caused by single unit consumed water circulating pump changed power, unit is unit/h；
4) if comprehensive variation delta $ of operating cost is negative, representing that cost of electricity-generating declines, power station economy improves；
If comprehensive variation delta $ of operating cost is just, representing that cost of electricity-generating rises, power station economy reduces；Meanwhile,
Adjust forward and backward in the method for operation, keep Turbo-generator Set power constant as far as possible.
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| CN201610147624.5A CN105869063A (en) | 2016-03-16 | 2016-03-16 | Economical monitoring device and method for adjustment of operation modes of circulating water system of power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701519A (en) * | 2021-08-16 | 2021-11-26 | 中国能源建设集团江苏省电力设计院有限公司 | Method for optimizing circulating water system under condenser with main steam turbine and small steam turbine arranged separately |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305107A (en) * | 2011-09-20 | 2012-01-04 | 河北省电力建设调整试验所 | Turboset heat rate online monitoring device and method based on cold side heat loss |
| CN202471305U (en) * | 2012-03-01 | 2012-10-03 | 河北省电力研究院 | Heat rate monitoring device of heat-engine plant turboset |
| CN103244433A (en) * | 2013-05-09 | 2013-08-14 | 国家电网公司 | Operation optimizing and monitoring method for variable-frequency circulating water pump of power plant |
-
2016
- 2016-03-16 CN CN201610147624.5A patent/CN105869063A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305107A (en) * | 2011-09-20 | 2012-01-04 | 河北省电力建设调整试验所 | Turboset heat rate online monitoring device and method based on cold side heat loss |
| CN202471305U (en) * | 2012-03-01 | 2012-10-03 | 河北省电力研究院 | Heat rate monitoring device of heat-engine plant turboset |
| CN103244433A (en) * | 2013-05-09 | 2013-08-14 | 国家电网公司 | Operation optimizing and monitoring method for variable-frequency circulating water pump of power plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701519A (en) * | 2021-08-16 | 2021-11-26 | 中国能源建设集团江苏省电力设计院有限公司 | Method for optimizing circulating water system under condenser with main steam turbine and small steam turbine arranged separately |
| CN113701519B (en) * | 2021-08-16 | 2023-09-29 | 中国能源建设集团江苏省电力设计院有限公司 | Method for optimizing circulating water system under condenser separately arranged on main turbine and small turbine |
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