CN108663097A - A kind of voltage-stablizer level measurement device and method - Google Patents
A kind of voltage-stablizer level measurement device and method Download PDFInfo
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- CN108663097A CN108663097A CN201810443517.6A CN201810443517A CN108663097A CN 108663097 A CN108663097 A CN 108663097A CN 201810443517 A CN201810443517 A CN 201810443517A CN 108663097 A CN108663097 A CN 108663097A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
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Abstract
A kind of voltage-stablizer level measurement device of present invention offer and method, this method include：First is obtained respectively refers to pipe water level value with reference to pipe water level value and second；The first, second with reference to second pressure pipe pressure sensor location and voltage-stablizer pressure sensor location between poor, second reference pipe pressure sensor location and first poor with reference to the first pressure between pipe pressure sensor location and voltage-stablizer pressure sensor location is obtained respectively with reference to the third pressure difference between pipe pressure sensor location；The first water level difference is obtained using first pressure difference and the third pressure difference, the second water level difference is obtained using second pressure difference and third pressure difference；Voltage-stablizer the first show value of water level is obtained with reference to pipe water level value and the first water level difference using first, voltage-stablizer the second show value of water level is obtained with reference to pipe water level value and the second water level difference using second.The level measuring result of the present invention not by water density in voltage-stablizer, vapour density, with reference in pipe water density and voltage-stablizer angle of inclination influenced, the precision of voltage-stablizer level measuring can be improved.
Description
Technical field
The present invention relates to level measuring field more particularly to a kind of voltage-stablizer level measurement device and measurement methods.
Background technology
In pressurized-water reactor nuclear power plant, voltage-stablizer water level is the water loading amount for representing reactor-loop coolant system, surely
Depressor water level is important technique measurement parameter for control and protective effect, can be straight when voltage-stablizer water level is too high or too low
Contact hair Reactor trip.Water level control of pressurizer system is one of five big control system of reactor, accurate as far as possible to measure surely
Depressor water level, to ensure the safety and economic operation of power plant.It is existing that voltage-stablizer water is measured by remote level indicator, differential pressure method
Position method be only applicable to land nuclear power station, if be used for floating nuclear power plant level measuring, measurement method by Media density,
Inclined influence is waved, measurement error is big, cannot be satisfied the functional requirement of reactor voltage-stablizer control and protection system.It is thus anxious
A kind of it need to can eliminate Media density, platform waves the voltage-stablizer water level measurement method for tilting caused measurement error.
Invention content
Technical problem to be solved by the present invention lies in, provide level measuring result not by Media density, wave inclination shadow
Loud voltage-stablizer water level measurement method and device.
A kind of voltage-stablizer level measurement device comprising：First inside voltage-stablizer is set to reference to pipe and the second reference
Pipe, differential pressure pick-up and signal processing unit, wherein
The differential pressure pick-up is used to obtain described first with reference to the of pipe pressure sensor location and the voltage-stablizer pressure sensor location
One pressure difference, second with reference to pipe pressure sensor location and the voltage-stablizer pressure sensor location second pressure it is poor, second refer to pipe pressure position
Set the third pressure difference with reference to pipe pressure sensor location with first；
The signal processing unit be used for poor, the third pressure difference according to the first pressure obtain first with reference to pipe water level and
The first water level difference between voltage-stablizer water level, and second is obtained with reference to pipe according to the second pressure difference and third pressure difference
The second water level difference between water level and voltage-stablizer water level is additionally operable to refer to pipe water level value and first water using described first
Potential difference value obtains voltage-stablizer the first show value of water level, and refers to pipe water level value and the second water level difference using described second
Obtain voltage-stablizer the second show value of water level.
Wherein, the differential pressure pick-up includes 3 differential pressure transmitters, wherein the first differential pressure transmitter is used for the first pressure
Force difference is converted to the first current signal, and the second differential pressure transmitter is used to second pressure difference being converted to the second current signal, third
Differential pressure transmitter is used to third pressure difference being converted to third current signal.
Wherein, the signal processing unit includes the first divider and the second divider, wherein first divider point
Do not connect with the output end of first differential pressure transmitter and the third differential pressure transmitter, second divider respectively with institute
The second differential pressure transmitter is stated to connect with the output end of the third differential pressure transmitter.
Wherein, the signal processing unit further includes the first subtracter and the second subtracter, and first subtracter is used for
The first water level difference is subtracted with reference to pipe water level value obtain voltage-stablizer the first show value of water level using described first, described second
Subtracter, which is used to subtract the second water level difference with reference to pipe water level value using described second, obtains the second display of voltage-stablizer water level
Value.
Wherein, it described first is set to surely with reference to pipe pressure sensor location, voltage-stablizer pressure sensor location with reference to pipe pressure sensor location, second
In the same level of depressor lower part.
Wherein, first differential pressure transmitter, the second differential pressure transmitter, third differential pressure transmitter installation site be in
In same level, first differential pressure transmitter, the second differential pressure transmitter, third differential pressure transmitter installation site be less than institute
First is stated with reference to pipe, the pressure sensor location of the second reference pipe and voltage-stablizer.
Wherein, water replanishing device, for referring to pipe moisturizing with reference to pipe and described second to described first, so that first ginseng
It examines pipe and described second and keeps full water state with reference to pipe；
Electric control valve, the moisturizing speed for controlling the water replanishing device.
The present invention also provides a kind of voltage-stablizer water level measurement method, this method includes：
Step S1 is arranged first with reference to pipe, second with reference to pipe and differential pressure pick-up inside voltage-stablizer, obtains first respectively
Pipe water level value is referred to reference to pipe water level value and second；
Step S2, obtain respectively it is first poor with reference to the first pressure between pipe pressure sensor location and voltage-stablizer pressure sensor location, the
Two is poor with reference to the second pressure between pipe pressure sensor location and voltage-stablizer pressure sensor location, second refers to reference to pipe pressure sensor location and first
Third pressure difference between pipe pressure sensor location；
Step S3 obtains the first water level difference using the first pressure difference and the third pressure difference, utilizes described the
Two pressure differences and the third pressure difference obtain the second water level difference；
Step S4 obtains voltage-stablizer water level first with reference to pipe water level value and the first water level difference using described first and shows
Indicating value obtains voltage-stablizer the second show value of water level using described second with reference to pipe water level value and the second water level difference.
Wherein, in the step S3, the first pressure difference obtains according to the following equation：
PAC=(ρW-ρs)·ΔLA·g
Wherein, PACPoor, the ρ for the first reference pipe pressure sensor location and the first pressure of voltage-stablizer pressure sensor locationWFor water density, ρs
For water-vapour density, Δ LAFor first with reference to the difference between pipe water level and voltage-stablizer water level, g is acceleration of gravity；
The second pressure difference obtains according to the following equation：
PBC=(ρW-ρs)·ΔLB·g
Wherein, PBCPoor, the ρ for the second reference pipe pressure sensor location and the second pressure of voltage-stablizer pressure sensor locationWFor water density, ρs
For water-vapour density, Δ LBFor second with reference to the difference between pipe water level and voltage-stablizer water level, g is acceleration of gravity；
The third pressure difference obtains according to the following equation：
PBA=(ρW-ρs)·ΔL·g
Wherein, PBAFor second with reference to the third pressure difference between pipe pressure sensor location and the first reference pipe pressure sensor location, ρWFor
Water density, ρsFor water-vapour density, Δ L is the difference between the second reference pipe water level and the first reference pipe water level, and g adds for gravity
Speed.
Wherein, the step S3 is specifically included：
The first pressure difference is converted into the first current signal, the second pressure difference is converted into the second electric current letter
Number, the third pressure difference is converted into third current signal, utilizes first current signal and the third current signal
The first water level difference is obtained, the second water level difference is obtained using second current signal and third current signal.
Wherein, the first water level difference obtains according to the following equation：
Wherein, I1For the first electric signal that first pressure difference is converted into, K1It is converted into the first electric signal institute for first pressure difference
Corresponding proportionality coefficient, I are the third electric signal that third pressure difference is converted into, K3Third electric signal is converted to for third pressure difference
Corresponding proportionality coefficient, ICF1The result of output when carrying out division arithmetic for the first electric signal and third electric signal；
The second water level difference obtains according to the following equation：
Wherein, I2For the second electric signal that second pressure difference is converted into, K2It is converted into the second electric signal institute for second pressure difference
Corresponding proportionality coefficient, I are the third electric signal that third pressure difference is converted into, K3Third electric signal is converted to for third pressure difference
Corresponding proportionality coefficient, ICF2The result of output when carrying out division arithmetic for the second electric signal and third electric signal.
Wherein, in the step S4, first show value of voltage-stablizer water level and second show value of voltage-stablizer water level
It obtains according to the following equation respectively：
Wherein, LIt is narrowIndicate voltage-stablizer the first show value of water level, LIt is wideIndicate voltage-stablizer the second show value of water level, LAIndicate first
With reference to pipe water level value, LBIndicate that second refers to pipe water level value.
The advantageous effect of the embodiment of the present invention is：The present invention obtains reference by built-in 2 references pipe in voltage-stablizer
Pressure difference and reference between pipe and voltage-stablizer manage and with reference to the pressure differences between pipe, and make voltage-stablizer by division arithmetic
The measured value of water level not by vapour density in water density in voltage-stablizer, voltage-stablizer, with reference to water density in pipe and voltage-stablizer whether
Inclined influence improves the accuracy of voltage-stablizer level measuring.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of voltage-stablizer level measurement device schematic diagram of the embodiment of the present invention；
Fig. 2 is voltage-stablizer level measuring principles of signal processing figure of the embodiment of the present invention；
Fig. 3 is voltage-stablizer water level measurement method flow chart of the embodiment of the present invention.
Specific implementation mode
The explanation of following embodiment is refer to the attached drawing, can be to the specific embodiment implemented to the example present invention.
It please refers to shown in Fig. 1, the embodiment of the present invention one provides a kind of voltage-stablizer level measurement device, which includes
Be set to inside voltage-stablizer first with reference to pipe 1 and second with reference to pipe 2, the first differential pressure pick-up 1#, the second differential pressure pick-up 2#,
Third differential pressure pick-up 3# and signal processing unit, specifically, differential pressure pick-up are differential pressure transmitter.First sets with reference to pipe 1
Pressure tappings A, the second reference setting pressure tappings of pipe 2 B, voltage-stablizer setting pressure tappings C are set, in order to ensure datum mark having the same,
Three pressure tappings are located on the same horizontal plane in voltage-stablizer lower part, and differential pressure transmitter 1#, 2#, 3# installation site are as possible in a water
In plane, and the installation site of differential pressure transmitter is managed less than the first reference, the pressure sensor location of the second reference pipe and voltage-stabiliser tube.Though
So the installation site of differential pressure transmitter 1#, 2#, 3# is not located in sustained height in Fig. 1, but table is only intended merely in Fig. 1
Show the connection relation of differential pressure transmitter.
Wherein, the ends LP of first differential pressure pick-up 1# are connect with pressure tappings A for obtaining the pressure value at pressure tappings A,
The ends HP are connect with pressure tappings C for obtaining the pressure value at pressure tappings C, by Δ PACSignal is converted to the first electric current I1, second
The ends LP of differential pressure pick-up 2# are connect with pressure tappings B for obtaining the pressure value at pressure tappings B, and the ends HP are connect with pressure tappings C-terminal
For obtaining the pressure value at pressure tappings C, and by Δ PBCBe converted to the second electric current I2, the ends LP of third differential pressure pick-up 3# with take
Pressure mouth B connections are connect with pressure tappings A for obtaining the pressure at pressure tappings A for obtaining the pressure value at pressure tappings B, the ends HP
Value, and by Δ PBABe converted to third electric current I3。
The signal processing unit includes the first divider 11 and the second divider 12, and the first electric signal and third electric signal are defeated
Enter the first divider 11 and carry out division arithmetic, to obtain the first water level difference, the second electric signal and third electric signal input the
Double division method device 12 carries out division arithmetic, to obtain the second water level difference.The signal that differential pressure pick-up exports is passed through into divider
Signal processing is carried out, water density can be eliminated or voltage-stablizer tilts and waves caused measurement error.
The signal processing unit further includes the first subtracter and the second subtracter, by first with reference to the water level value of pipe 1 and the
One water level difference, which inputs the first subtracter, subtracts each other and obtains voltage-stablizer the first show value of water level, by second with reference to 2 water level value of pipe and the
Two water level differences input the second subtracter and subtract each other acquisition voltage-stablizer the second show value of water level.
Wherein, the first show value of voltage-stablizer water level is the narrow range show value of voltage-stablizer water level, and voltage-stablizer water level second is shown
Value is voltage-stablizer water level wide-range show value.
The heater interference of voltage-stablizer bottom and local heating effect are to the influence with reference to pipe in order to prevent, and first with reference to pipe
1 and second arranges along the inner wall of voltage-stablizer as possible with reference to the lower part of pipe 2, in order to reduce differential pressure transmitter both sides with reference to water temperature in pipe
With the influence of pressure, reduces voltage-stablizer inclination and wave to reference to the influence for managing interior water level, being mounted on as possible surely with reference to the top of pipe
The position of depressor inside center.In order to ensure that the variation of water temperature in voltage-stablizer, reference can be rapidly adapted to reference to the water temperature in pipe
The outer diameter of pipe should be as small as possible.
The height of wherein second reference pipe 2 should cover entire level measuring range, and the height of the first reference pipe 1 is second
With reference to 80% or so of the height of pipe 2.
The level measurement device further includes water replanishing device and the electric control valve 4 that is controlled water replanishing device.The benefit
Water installations are specially water supply pipe 3, are given for the ease of water supply pipe 3 and refer to pipe moisturizing, horn mouth form is designed to reference to the upper end of pipe
Structure, water supply pipe 3 extend into horn mouth, ensures that the water in water supply pipe 3 can smoothly enter into reference in pipe, during moisturizing,
Supplement water flow velocity is low as possible, and flow is small as possible, can pass through diversion at the outlets RPV or main pump inlet.By adjusting electric control valve 4
Aperture, continuously carry out moisturizing with reference to pipe 2 with reference to pipe 1 and second to first, ensure always to be to maintain the shape of full water with reference to pipe 1,2
State, to ensure the precision measured, when normal moisturizing, moisturizing ensures the state of water clock.It is adjustable if dehydration is excessive under accident conditions
Valve opening is saved, water is filled in 10s, is then transferred to water clock state again.
It please refers to shown in Fig. 3, second embodiment of the present invention provides a kind of voltage-stablizer water level measurement methods, including：
Step S1 obtains first and refers to 2 water level value of pipe with reference to 1 water level value of pipe and second,
Step S2, obtain respectively it is first poor with reference to the first pressure between 1 pressure sensor location of pipe and voltage-stablizer pressure sensor location, the
Two is poor with reference to the second pressure between 2 pressure sensor location of pipe and voltage-stablizer pressure sensor location, second joins with reference to 2 pressure sensor location of pipe and first
Examine the third pressure difference between 1 pressure sensor location of pipe；
Step S3 obtains the first water level difference using first pressure difference and third pressure difference, utilizes second pressure difference and the
Three pressure differences obtain the second water level difference；
Step S4 acquires the first show value of voltage-stablizer water level, profit using first with reference to 1 water level value of pipe and the first water level difference
With second the second show value of voltage-stablizer water level is acquired with reference to 2 water level value of pipe and the second water level difference.
It is specifically described below in conjunction with Fig. 1-3.
According to Fig. 1, it is assumed that the temperature of steam is T in voltage-stablizerS, vapour density ρS, water density ρW, coolant-temperature gage
For TW, it is T with reference to coolant-temperature gage in piper, it is ρ with reference to pipe water densityr, the water level value in voltage-stablizer is L, first with reference to pipe 1 water level
Value is LA, the water level value of the second reference pipe 2 is LB, the first reference pipe 1 and second is Δ L, the first ginseng with reference to the water level difference of pipe 2
The water level difference for examining pipe 1 and voltage-stablizer is Δ LA, second refers to the water level difference of pipe 2 and voltage-stablizer as Δ LB, PAFor pressure tappings A
Pressure, PBFor the pressure at pressure tappings B, PCFor the pressure of pressure tappings C, Δ PACFor the pressure difference between pressure tappings A, C, Δ PBC
For the pressure difference between pressure tappings B, C, Δ PBAFor the pressure difference between pressure tappings B, A, Δ P can be calculatedAC、ΔPBCWith Δ PBA,
ΔPBA=PB-PA=[ρrΔL-ρSΔ L)] g=(ρr-ρS)gΔL
ΔPAC=PA-PC=[ρrLA-(ρWL+ρSΔLA)]g
ΔPBC=PB-PC=[ρrLB-(ρWL+ρSΔLB)] g,
Since the first reference pipe 1 and second is arranged at reference to pipe 2 inside voltage-stablizer, it is believed that with reference to coolant-temperature gage T in piperWith
Coolant-temperature gage T in voltage-stablizerWApproximately equal, therefore, with reference to water density ρ in piperWith water density ρ in voltage-stablizerWApproximately equal, i.e.,
ρr=ρW, so
ΔPBA=(ρW-ρS)gΔL
ΔPAC=(ρW-ρS)gΔLA
ΔPBC=(ρW-ρS)gΔLB
By above formula it is found that Δ PAC、ΔPBCWith Δ PBAThey have common parameter factors (ρW-ρS)g。ΔPAC、Δ
PBCIt is to change with voltage-stablizer water level L variations, is respectively depending on variable △ LAWith △ LB；ΔPBADo not become with voltage-stablizer water level L
Change, depends on two difference in height △ L with reference to pipe, and due to ensureing the first reference pipe 1 and second with reference at pipe 2 by moisturizing
In full water state, thus △ L are certain value.
As shown in Figure 2, using the first differential pressure transmitter by Δ PACIt is converted into the first electric current I1, utilize the second differential pressure transmitter
By Δ PBCIt is converted into the second electric current I2, using third differential pressure transmitter by Δ PBAIt is converted into third electric current I3, then have：
I1=K1ΔPAC=K1·(ρW-ρS)gΔLA
I2=K2ΔPBC=K2·(ρW-ρS)gΔLB
I3=K3ΔPBA=K3·(ρW-ρS)gΔL
Wherein, K1For the coefficient of the first differential pressure transmitter, K2For the coefficient of the second differential pressure transmitter, K3Become for third differential pressure
The coefficient for sending device, by electric current I1With electric current I3It is sent into the first divider 11 and carries out division arithmetic, by electric current I2With electric current I3It is sent into the
Double division method device 12 carries out division arithmetic, then has：
Wherein, ICF1For 11 output valve of the first divider, ICF2For 12 output valve of the second divider, from the above equation, we can see that, division
The ratio of device output is directlyed proportional with reference pipe water level to the difference of voltage-stablizer water level, and is steamed in water density in voltage-stablizer, voltage-stablizer
It is vapour density, unrelated with reference to water density in pipe, eliminate the shadow to level measuring with reference to coolant-temperature gage in pipe and voltage-stablizer pressure change
It rings.
By above formula to obtain：
Utilize LAWith Δ LANarrow range water gage indicating value is calculated, L is utilizedBWith Δ LBWide-range water gage indicating value is calculated,
Above-mentioned calculating is carried out under the heeling condition for not considering voltage-stablizer, false when considering that voltage-stablizer inclination is waved
If the angle of inclination of voltage-stablizer is α, then the electric current I that three differential pressure transmitters export1'、I'2、I3' be：
I1'=K1ΔPA'C=K1·(ρW-ρS)gΔLA·COSα
I'2=K2ΔPB'C=K2·(ρW-ρS)gΔLA·COSα
I3'=K3ΔPB'A=K3·(ρW-ρS)gΔL·COSα
The signal I' exported after divider processing can similarly be obtainedCF1And I'CF2For：
From the above equation, we can see that after voltage-stablizer tilts, the output signal of divider with output signal when not tilting be it is identical,
Therefore, it is waved regardless of voltage-stablizer tilts, the result that voltage-stablizer water level measurement system measures is all unaffected.
Built-in two with reference to pipe, the is obtained by differential pressure transmitter in voltage-stablizer for the voltage-stablizer water level measurement method of the present invention
It is poor with the first pressure between voltage-stablizer pressure at one reference pipe pressure, and it is converted into the first electric signal, obtain second
With reference to poor with the second pressure between voltage-stablizer pressure at pipe pressure, and it is converted into the second electric signal, obtains the second ginseng
Pipe and first is examined with reference to the third pressure difference between pipe pressure, and is converted into third electric signal, and utilizes the first telecommunications
Number division arithmetic is carried out to acquire the first water level difference with third electric signal, the second electric signal carries out division with third electric signal
Narrow range finally is calculated with reference to pipe water level value and the first water level difference using first to acquire the second water level difference in operation
Wide-range water level show value is calculated with reference to pipe water level value and the second water level difference using second in water level show value.The present invention
Computational methods, by division arithmetic so that the measured value of voltage-stablizer water level is not by steam in water density in voltage-stablizer, voltage-stablizer
Density, with reference to water density in pipe and the whether inclined influence of voltage-stablizer, improve the accuracy of voltage-stablizer level measuring.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (12)
1. a kind of voltage-stablizer level measurement device comprising：First inside voltage-stablizer is set to manage with reference to pipe and the second reference,
Differential pressure pick-up and signal processing unit, wherein
The differential pressure pick-up is used to obtain described first the first pressure with reference to pipe pressure sensor location and the voltage-stablizer pressure sensor location
Force difference, second with reference to pipe pressure sensor location and the voltage-stablizer pressure sensor location second pressure it is poor, second with reference to pipe pressure sensor location with
The third pressure difference of first reference pipe pressure sensor location；
The signal processing unit is used for, third pressure difference poor according to the first pressure and obtains first with reference to pipe water level and voltage stabilizing
The first water level difference between device water level, and obtain second according to the second pressure difference and third pressure difference and refer to pipe water level
The second water level difference between voltage-stablizer water level is additionally operable to refer to pipe water level value and first water-head using described first
Value obtains voltage-stablizer the first show value of water level, and is obtained with reference to pipe water level value and the second water level difference using described second
The second show value of voltage-stablizer water level.
2. voltage-stablizer level measurement device according to claim 1, it is characterised in that：
The differential pressure pick-up includes 3 differential pressure transmitters, wherein the first differential pressure transmitter is for being converted to first pressure difference
First current signal, the second differential pressure transmitter are used to second pressure difference being converted to the second current signal, third differential pressure transmitter
For third pressure difference to be converted to third current signal.
3. voltage-stablizer level measurement device according to claim 2, it is characterised in that：
The signal processing unit includes the first divider and the second divider, wherein first divider is respectively with described the
One differential pressure transmitter is connected with the output end of the third differential pressure transmitter, second divider respectively with second differential pressure
Transmitter is connected with the output end of the third differential pressure transmitter.
4. voltage-stablizer level measurement device according to claim 3, it is characterised in that：
The signal processing unit further includes the first subtracter and the second subtracter, and first subtracter is used to utilize described the
One subtracts the first water level difference with reference to pipe water level value obtains voltage-stablizer the first show value of water level, and second subtracter is used for
The second water level difference is subtracted with reference to pipe water level value obtain voltage-stablizer the second show value of water level using described second.
5. voltage-stablizer level measurement device according to claim 1, it is characterised in that：Described first with reference to pipe pressure position
It sets, second is set to reference to pipe pressure sensor location, voltage-stablizer pressure sensor location in the same level of voltage-stablizer lower part.
6. a kind of voltage-stablizer level measurement device according to claim 5, it is characterised in that：First differential pressure transporting
Device, the second differential pressure transmitter, third differential pressure transmitter installation site be all in the same horizontal plane, first differential pressure transporting
Device, the second differential pressure transmitter, third differential pressure transmitter installation site less than it is described first with reference to pipe, second with reference to pipe and voltage stabilizing
The pressure sensor location of device.
7. a kind of voltage-stablizer level measurement device according to claim 1, it is characterised in that：Further include：
Water replanishing device is used to refer to pipe moisturizing with reference to pipe and described second to described first, so that the first reference pipe and institute
It states second and keeps full water state with reference to pipe；
Electric control valve, the moisturizing speed for controlling the water replanishing device.
8. a kind of voltage-stablizer water level measurement method, this method include：
Step S1 is arranged first with reference to pipe, second with reference to pipe and differential pressure pick-up inside voltage-stablizer, obtains the first reference respectively
Pipe water level value and second refers to pipe water level value；
Step S2 obtains the first, second ginseng poor with reference to the first pressure between pipe pressure sensor location and voltage-stablizer pressure sensor location respectively
The poor second pressure between pipe pressure sensor location and voltage-stablizer pressure sensor location, the second reference pipe pressure sensor location and the first reference pipe is examined to take
Press the third pressure difference between position；
Step S3 obtains the first water level difference using the first pressure difference and the third pressure difference, is pressed using described second
Force difference and the third pressure difference obtain the second water level difference；
Step S4 obtains voltage-stablizer water level first with reference to pipe water level value and the first water level difference using described first and shows
Value obtains voltage-stablizer the second show value of water level using described second with reference to pipe water level value and the second water level difference.
9. voltage-stablizer water level measurement method according to claim 8, which is characterized in that in the step S3, described first
Pressure difference obtains according to the following equation：
PAC=(ρW-ρs)·ΔLA·g
Wherein, PACPoor, the ρ for the first reference pipe pressure sensor location and the first pressure of voltage-stablizer pressure sensor locationWFor water density, ρsFor water
Vapour density, Δ LAFor first with reference to the difference between pipe water level and voltage-stablizer water level, g is acceleration of gravity；
The second pressure difference obtains according to the following equation：
PBC=(ρW-ρs)·ΔLB·g
Wherein, PBCPoor, the ρ for the second reference pipe pressure sensor location and the second pressure of voltage-stablizer pressure sensor locationWFor water density, ρsFor water
Vapour density, Δ LBFor second with reference to the difference between pipe water level and voltage-stablizer water level, g is acceleration of gravity；
The third pressure difference obtains according to the following equation：
PBA=(ρW-ρs)·ΔL·g
Wherein, PBAFor second with reference to the third pressure difference between pipe pressure sensor location and the first reference pipe pressure sensor location, ρWFor watertight
Degree, ρsFor water-vapour density, Δ L is the difference between the second reference pipe water level and the first reference pipe water level, and g is that gravity accelerates
Degree.
10. voltage-stablizer water level measurement method according to claim 9, it is characterised in that：The step S3 is specifically included：
The first pressure difference is converted into the first current signal, the second pressure difference is converted into the second current signal, it will
The third pressure difference is converted to third current signal, and the is obtained using first current signal and the third current signal
One water level difference obtains the second water level difference using second current signal and third current signal.
11. voltage-stablizer water level measurement method according to claim 10, it is characterised in that：The first water level difference according to
Following formula obtain：
Wherein, I1For the first electric signal that first pressure difference is converted into, K1It is converted into corresponding to the first electric signal for first pressure difference
Proportionality coefficient, I is the third electric signal that is converted into of third pressure difference, K3It is right that third electric signal is converted to for third pressure difference
The proportionality coefficient answered, ICF1The result of output when carrying out division arithmetic for the first electric signal and third electric signal；
The second water level difference obtains according to the following equation：
Wherein, I2For the second electric signal that second pressure difference is converted into, K2It is converted into corresponding to the second electric signal for second pressure difference
Proportionality coefficient, I is the third electric signal that is converted into of third pressure difference, K3It is right that third electric signal is converted to for third pressure difference
The proportionality coefficient answered, ICF2The result of output when carrying out division arithmetic for the second electric signal and third electric signal.
12. voltage-stablizer water level measurement method according to claim 11, which is characterized in that described steady in the step S4
The first show value of depressor water level and second show value of voltage-stablizer water level obtain according to the following equation respectively：
Wherein, LIt is narrowIndicate voltage-stablizer the first show value of water level, LIt is wideIndicate voltage-stablizer the second show value of water level, LAIndicate the first reference
Pipe water level value, LBIndicate that second refers to pipe water level value.
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