CN102735382A - Energy efficiency test method and device of variable frequency oil pump unit - Google Patents
Energy efficiency test method and device of variable frequency oil pump unit Download PDFInfo
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Abstract
The invention relates to an energy efficiency test method and an energy efficiency test device of a variable frequency oil pump unit. The method comprises the following steps of: computing the efficiency of a variable frequency oil pump; computing the input power of a variable frequency motor; computing the output power of the oil pump under the variable frequency working condition; computing the input power of the oil pump under the variable frequency working condition; computing the output power of the motor under the variable frequency working condition; computing the efficiency of the variable motor; acquiring an energy efficiency model of the variable frequency oil pump unit according to the efficiency of the variable frequency oil pump and the efficiency of the variable frequency motor, and then computing the energy efficiency of the variable frequency oil pump unit. The step of computing the output power of the motor under the variable frequency working condition comprises that if the power loss during the conveying process is ignored, the power of an output shaft of a transmission mechanism is equal to the power of an input shaft according to the energy conservation principle, namely, the output power of the motor under the variable frequency working condition is equal to the input power of the oil pump under the variable frequency working condition, and the output power of the motor under the variable frequency working condition is obtained through the input power of the oil pump under the variable frequency working condition, which is obtained in the step of computing the input power of the oil pump under the variable frequency working condition.
Description
Technical field
The present invention relates to transfer pump unit under the frequency conversion operating mode; Be particularly related to a kind of based on the frequency conversion transfer pump unit efficiency computing method of crossing the pump temperature difference; And according to the present SCADA of transfer station system acquisition service data situation; In conjunction with existing saving energy test instrument, formulate the frequency conversion transfer pump unit efficiency testing scheme of shortcut and simple.
Background technology
According to estimates, in the electric energy that industrial pump consumed, have 20% ~ 50% can save through converter technique.China uses the time of variable-frequency control technique and has only the more than ten years, and along with the development of external frequency converter, the development of the variable-frequency control technique of China also very rapidly.In recent years, frequency control way is superior to other mode of speed regulation in the past in the economic benefit that every profession and trade produced, and becomes the maincenter of Electric Traction industry.
It is an important content weighing the frequency conversion effect that frequency conversion transfer pump unit efficiency is calculated, and the operation conditions and the energy of transfer pump unit utilize situation under its reflection frequency conversion operating mode.Wherein, the calculating of output power of motor is the key that whole frequency conversion transfer pump unit efficiency is calculated under the frequency conversion operating mode.During existing frequency conversion transfer pump unit efficiency is calculated, derive for the characteristics and the motor interior electromagnetism transform equivalence principle of square torque class load according to the pump class usually, confirm relevant efficiency computation model.
At present, SY/T 6834-2011 a series of relevant standard criterions such as " frequency control actuator saving energy test methods and evaluation index " are worked out and issued to national petroleum industry.People such as Meir are a square torque class load according to centrifugal pump; Adopt the proportionality law method to calculate transfer pump shaft power and efficient thereof under the frequency conversion operating mode; Estimate the energy-saving potential of pumping set, think during calculating that the transfer pump mechanical efficiency under the different rotating speeds equates that result of calculation is not accurate enough.People such as Metwally (2002) are on motor equivalent electrical circuit basis; Utilize the known electric motor basic parameter; Based on motor output torque calculating motor output power; And then calculating motor efficient and transfer pump efficient, but rarely has concrete description for the on-the-spot test of frequency conversion transfer pump unit.People such as Daut (2009) are 5 horsepowers asynchronous motor efficiency calculation through analysis rated power; Analyze the situation that active power is transmitted from motor T type equivalent circuit, come calculating motor efficient through calculating motor loss efficient, but required parameter in calculating; Like motor stator, the every phase resistance of rotor; Leakage reactance and excitation reactance etc. obtain or rely on empirical estimating in being difficult to test at the scene, make computation-bound.People such as Zhang Yanbin (2002) carry out sound conversion and magnetoelectricity conversion from electromagnetic induction conversion between motor stator and rotor to complicated operation process, motor torque computing formula after the equivalent circuit theory derivation frequency conversion.In order to obtain the rotor asynchronous motor equivalent electrical circuit in when rotation, analyze and computation process so that simplify, replace original rotor with the stationary rotor of an equivalence, make the identical of equivalent rotor built-in potential and power frequency and stator.According to equivalence principle the relevant parameter of former rotation is converted, be called commutation frequency.The parameter of the equivalent static rotor behind the process commutation frequency is converted through winding each physical quantity of rotor-side is converted stator side, just can draw required equivalent electrical circuit.But calculate required parameter,, obtain in being difficult to test at the scene, make troubles for on-the-spot actual test like the every phase resistance of motor stator and rotor, every leakage reactance mutually etc.People such as Qiu Arui (2002) analyze active power according to motor T type equivalent circuit and transmit situation; Come calculating motor efficient through the calculating motor power attenuation; But calculate required parameter; Like the every phase resistance of motor stator and rotor, every leakage reactance and excitation reactance etc. mutually, obtain or rely on empirical estimating in also being difficult to test at the scene, make computation-bound.
Frequency conversion transfer pump unit efficiency is calculated and can be divided into 3 types substantially both at home and abroad, and the one, adopt the proportionality law method to calculate, the 2nd, according to the direct derivation of motor equivalent circuit theory, the 3rd, calculate motor power (output) loss efficient calculating motor efficient again.Adopt above method, all can calculate motor efficiency under the frequency conversion operating mode in theory, but required motor parameter obtains difficulty in the reality test, perhaps the computing method result error is bigger, in practical application, is difficult to realize and promote.If directly use torque gauge test motor output torque; Be insertion type torque gauge or non-intervention type torque gauge all must be when unit outage the mounting torque sensing equipment; The insertion type torque gauge also must be installed between motor reel and the pump shaft and could use as an axle system part, more makes troubles to the production scene.
Therefore, be necessary to study new frequency conversion transfer pump unit efficiency computing method, calculating the actual demand of satisfying on-the-spot test on the basis accurately.
Summary of the invention
The problem and the restriction that exist in the objective of the invention is to test at the scene to each method; In conjunction with practical operation; Derivation has also been set up based on the frequency conversion transfer pump unit efficiency computing method of crossing the pump temperature difference; According to frequency conversion transfer pump unit efficiency computing method, confirmed parameter, its operative norm and pertinent instruments that the test of frequency conversion transfer pump unit efficiency need measure, formulated frequency conversion transfer pump unit efficiency testing scheme with operability.
For realizing above-mentioned purpose, the invention provides a kind of frequency conversion transfer pump unit efficiency method of testing, comprising:
Calculate frequency conversion transfer pump efficient;
Calculate the adjustable frequency motor power input;
Calculate transfer pump output power under the frequency conversion operating mode;
Calculate transfer pump power input under the frequency conversion operating mode through transfer pump output power under the frequency conversion operating mode;
Calculate output power of motor under the frequency conversion operating mode through transfer pump power input under the frequency conversion operating mode;
Calculate adjustable frequency motor efficient through output power of motor under adjustable frequency motor power input and the frequency conversion operating mode;
Through frequency conversion transfer pump efficient and adjustable frequency motor efficient frequency conversion transfer pump unit efficiency is tested.
Optional, in one embodiment of the invention, said frequency conversion transfer pump unit efficiency the test through frequency conversion transfer pump efficient and adjustable frequency motor efficient comprises:
Confirm the on-site parameters of on-the-spot test needs according to frequency conversion transfer pump unit efficiency model;
Choose instrument according to on-site parameters, and the instrument of choosing is tested;
Test through motor and transfer pump according to frequency conversion transfer pump unit efficiency model and to obtain under motor test parameter, transfer pump test parameter, the frequency conversion operating mode transfer pump test parameter under the motor test parameter and frequency conversion operating mode;
Instrument after the utilization test carries out on-the-spot test and obtains on-site parameters;
According to transfer pump test parameter under motor test parameter and the frequency conversion operating mode under motor test parameter, transfer pump test parameter, on-site parameters, the frequency conversion operating mode, adopt frequency conversion transfer pump unit efficiency model to calculate to realize the test of frequency conversion transfer pump unit efficiency.
Optional, in one embodiment of the invention, output power of motor comprises under the said calculating frequency conversion operating mode:
Power attenuation in the transmittance process is ignored; According to conservation of energy principle; Then the power of gear train output shaft equates with the power of input shaft; Be under the frequency conversion operating mode under output power of motor and the frequency conversion operating mode transfer pump power input equate that the transfer pump power input is obtained output power of motor under the frequency conversion operating mode under the frequency conversion operating mode that draws through transfer pump power input calculation procedure under the said frequency conversion operating mode.
Optional, in one embodiment of the invention, said calculating adjustable frequency motor power input comprises:
Measure and calculate adjustable frequency motor power input desired parameters, according to calculation of parameter adjustable frequency motor power input.
Optional, in one embodiment of the invention, the said method of measuring calculating adjustable frequency motor power input desired parameters is the electric energy meter method.
Optional, in one embodiment of the invention, the said method of measuring calculating adjustable frequency motor power input desired parameters is a current/voltage power factor method.
Optional, in one embodiment of the invention, said instrument comprises: electric power analyser, float type densimeter, viscosity meter, hand-held laser velocity gauge, portable flow meter and mercury-in-glass thermometer.
Optional, in one embodiment of the invention, said transfer pump test parameter comprises imported crude oil temperature, outlet crude oil temperature, imported crude oil pressure, exports former oil pressure, oil density and actual measurement crude oil volumetric flow rate.
Optional, in one embodiment of the invention, the transfer pump test parameter comprises out temperature, pressure and volumetric flow rate under the said frequency conversion operating mode.
For realizing above-mentioned purpose, the present invention also provides a kind of frequency conversion transfer pump unit efficiency proving installation, comprising:
Frequency conversion transfer pump efficient unit is used to calculate frequency conversion transfer pump efficient;
Adjustable frequency motor power input unit is used to calculate the adjustable frequency motor power input;
Transfer pump output power unit under the frequency conversion operating mode is used to calculate transfer pump output power under the frequency conversion operating mode;
Transfer pump power input unit under the frequency conversion operating mode is used for calculating transfer pump power input under the frequency conversion operating mode through transfer pump output power under the frequency conversion operating mode;
Output power of motor unit under the frequency conversion operating mode is used for calculating output power of motor under the frequency conversion operating mode through transfer pump power input under the frequency conversion operating mode;
Adjustable frequency motor efficient unit is used for calculating adjustable frequency motor efficient through output power of motor under adjustable frequency motor power input and the frequency conversion operating mode;
Frequency conversion transfer pump unit efficiency test cell is tested frequency conversion transfer pump unit efficiency through frequency conversion transfer pump efficient and adjustable frequency motor efficient.
Optional, in one embodiment of the invention, said frequency conversion transfer pump unit efficiency test cell comprises:
The on-site parameters determination module is used for confirming according to frequency conversion transfer pump unit efficiency model the on-site parameters of on-the-spot test needs;
The instrument test module is used for choosing instrument according to on-site parameters, and the instrument of choosing is tested;
The test parameter acquisition module is used for testing through motor and transfer pump according to frequency conversion transfer pump unit efficiency model and obtains under motor test parameter, transfer pump test parameter, the frequency conversion operating mode transfer pump test parameter under the motor test parameter and frequency conversion operating mode;
The on-site parameters acquisition module is used to utilize instrument after the test to carry out on-the-spot test and obtains on-site parameters;
The efficiency acquisition module; Be used for according to transfer pump test parameter under motor test parameter and the frequency conversion operating mode under motor test parameter, transfer pump test parameter, on-site parameters, the frequency conversion operating mode, adopt frequency conversion transfer pump unit efficiency model to calculate to realize the test of frequency conversion transfer pump unit efficiency.
Optional, in one embodiment of the invention, the output power of motor unit calculates that output power of motor comprises under the frequency conversion operating mode under the said frequency conversion operating mode:
Power attenuation in the transmittance process is ignored; According to conservation of energy principle; Then the power of gear train output shaft equates with the power of input shaft; Be under the frequency conversion operating mode under output power of motor and the frequency conversion operating mode transfer pump power input equate that the transfer pump power input is obtained output power of motor under the frequency conversion operating mode under the frequency conversion operating mode that draws through transfer pump power input calculation procedure under the said frequency conversion operating mode.
Optional, in one embodiment of the invention, said adjustable frequency motor power input unit calculates the adjustable frequency motor power input and comprises:
Measure and calculate adjustable frequency motor power input desired parameters, according to calculation of parameter adjustable frequency motor power input.
Optional, in one embodiment of the invention, said instrument test module is chosen instrument and is comprised: electric power analyser, float type densimeter, viscosity meter, hand-held laser velocity gauge, portable flow meter and mercury-in-glass thermometer.
Optional, in one embodiment of the invention, the transfer pump test parameter that said test parameter acquisition module obtains comprises imported crude oil temperature, outlet crude oil temperature, imported crude oil pressure, exports former oil pressure, oil density and actual measurement crude oil volumetric flow rate.
Technique scheme has following beneficial effect: through comparing domestic and international efficiency computing method in this field under the frequency conversion operating mode; The problem and the restriction that exist in testing at the scene to each method; In conjunction with practical operation; Derivation has also been set up based on the frequency conversion transfer pump unit efficiency computing method of crossing the pump temperature difference, and the required calculating parameter of this method is few, computation process is simple, brings convenience for on-the-spot actual the test.According to frequency conversion transfer pump unit efficiency computing method, confirmed parameter, its operative norm and pertinent instruments that the test of frequency conversion transfer pump unit efficiency need measure, formulated frequency conversion transfer pump unit efficiency testing scheme with operability.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is one of a kind of frequency conversion transfer pump unit efficiency method of testing process flow diagram of proposing of the present invention;
Fig. 2 is two of a kind of frequency conversion transfer pump unit efficiency method of testing process flow diagram of proposing of the present invention;
Fig. 3 is a kind of frequency conversion transfer pump unit efficiency proving installation block diagram that the present invention proposes;
Fig. 4 is a frequency conversion transfer pump unit efficiency test cell composition frame chart in a kind of frequency conversion transfer pump unit efficiency proving installation of proposing of the present invention;
Fig. 5 is transfer pump point for measuring temperature and a Disposal of Pressure Detecting Point synoptic diagram in a kind of frequency conversion transfer pump unit efficiency method of testing that the present invention proposes.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
When carrying out the calculating of frequency conversion transfer pump unit efficiency, directly test is relatively more difficult with the calculating motor output power.Reduce under the more situation at motor speed, calculate transfer pump shaft power with the proportionality law method, the result is little than actual value under the same terms.According to motor torque computing formula or motor loss horse-power formula calculating motor output power, under present field condition, required motor parameter such as stator, the every phase leakage reactance of rotor etc. is difficult to measure, and then can't calculate.Through comparing domestic and international efficiency computing method under the frequency conversion operating mode in this field; The problem and the restriction that exist in testing at the scene to each method; In conjunction with practical operation, derive and set up based on the frequency conversion transfer pump unit efficiency computing method of crossing the pump temperature difference, and according to frequency conversion transfer pump unit efficiency computing method; Confirmed parameter, its operative norm and pertinent instruments that the test of frequency conversion transfer pump unit efficiency need measure, formulated frequency conversion transfer pump unit efficiency testing scheme with operability.
The application comprises frequency conversion transfer pump unit efficiency computation model and frequency conversion transfer pump unit efficiency testing scheme two parts content.
As shown in Figure 1, one of a kind of frequency conversion transfer pump unit efficiency method of testing process flow diagram that proposes for the present invention.This method comprises:
Step 101: calculate frequency conversion transfer pump efficient;
Step 102: calculate the adjustable frequency motor power input;
Step 103: calculate transfer pump output power under the frequency conversion operating mode;
Step 104: calculate transfer pump power input under the frequency conversion operating mode through transfer pump output power under the frequency conversion operating mode;
Step 105: calculate output power of motor under the frequency conversion operating mode through transfer pump power input under the frequency conversion operating mode;
Step 106: calculate adjustable frequency motor efficient through output power of motor under adjustable frequency motor power input and the frequency conversion operating mode;
Step 107: frequency conversion transfer pump unit efficiency is tested through frequency conversion transfer pump efficient and adjustable frequency motor efficient.
As shown in Figure 2, two of a kind of frequency conversion transfer pump unit efficiency method of testing process flow diagram that proposes for the present invention.Further; Step 105 is changed to step 105 ': the power attenuation in the transmittance process is ignored; According to conservation of energy principle; Then the power of gear train output shaft equates with the power of input shaft, i.e. under the frequency conversion operating mode under output power of motor and the frequency conversion operating mode transfer pump power input equate that the transfer pump power input is obtained output power of motor under the frequency conversion operating mode under the frequency conversion operating mode that draws through transfer pump power input calculation procedure under the said frequency conversion operating mode.So, a kind of frequency conversion transfer pump unit efficiency computing method that the present invention proposes are divided each research unit according to frequency conversion transfer pump unit energy conversion relation according to the black box principle, study its energy equilibrium respectively.In conjunction with on-the-spot actual test and calculating; The pump temperature differential method was proposed; This method is the basis with thermodynamics energy conservation and transfer principle, and the temperature rise that analyse crude oil is produced when flowing through transfer pump is according to enthalpy and the irrelevant characteristic of process; Crude stream is equivalent for to decide entropy enthalpy difference and level pressure enthalpy difference sum through transfer pump import and export enthalpy difference, the calculating of transfer pump efficient under the derivation frequency conversion operating mode.
Wherein, step 101: calculate frequency conversion transfer pump efficient according to formula (1).
In the formula: η
VF, peTransfer pump efficient under the frequency conversion operating mode, %; H is the transfer pump lift, m; Δ t is that transfer pump is imported and exported the temperature difference, K; Δ P is the transfer pump inlet outlet pressure differential, MPa; S
pBe institute's output oil Isoentropic Compression Temperature Rise coefficient, ° C/Mpa;
Be the average specific heat capacity at constant pressure of transfer pump institute conveying crude oil, J/ (kgK).
Step 102: measure and calculate adjustable frequency motor power input desired parameters, to those skilled in the art, measuring method has a variety of, preferred electric energy meter method and current/voltage power factor method.
1. electric energy meter method
Measure electric energy meter and rotate required time t, electric energy meter transformer ratio K
iWith electric energy meter transformation ratio K
u, calculate acquisition adjustable frequency motor power input according to formula (2).
In the formula: K is the electric energy meter actual constant, r/ (kWh); T is that electric energy meter changes 10 commentaries on classics required times, s; K
iBe the electric energy meter transformer ratio; K
uBe the electric energy meter transformation ratio.According to calculation of parameter adjustable frequency motor power input.
2. current/voltage power factor method
Measure motor input terminals line voltage U under the frequency conversion operating mode
VF, lmi, motor input terminals line current I under the frequency conversion operating mode
VF, lmiWith the power factor of motor under running frequency under the frequency conversion operating mode
Above parameter can obtain through Power SCADA system of transfer station, perhaps records with the electric power analyser.Calculate acquisition adjustable frequency motor power input according to formula (3).
In the formula: U
VF, lmiBe motor input terminals line voltage under the frequency conversion operating mode, kV;
IVF, lmiBe motor input terminals line current under the frequency conversion operating mode, A;
Be the power factor of motor under running frequency under the frequency conversion operating mode.
Step 103: calculate transfer pump output power under the frequency conversion operating mode according to formula (4)
P
VF，po＝ρgHQ×10
-3 （4）
In the formula, ρ is the density of institute's output oil, kg/m
3The lift that H is obtained when flowing through transfer pump for institute's output oil, m; Q is the volumetric flow rate of institute's output oil, m
3/ s.
Step 104: calculate transfer pump power input under the frequency conversion operating mode according to formula (5) through transfer pump output power under the frequency conversion operating mode
In the formula, P
VF, poBe transfer pump output power under the frequency conversion operating mode, kW.
Step 105: calculate and obtain output power of motor under the frequency conversion operating mode; Further; On-the-spot the gear train moment of torsion on the motor reel and rotating speed under with the frequency conversion operating mode are delivered in the process of transfer pump; Follow conservation of energy principle; If promptly the power attenuation in the transmittance process is ignored, then the power of gear train output shaft equates with the power of input shaft, i.e. output power of motor P under the frequency conversion operating mode
VF, moWith the centrifugal pump shaft power P
VF, piEquate.
P
VF，pi＝P
VF,mo （6）
In the formula, P
VF, piBe transfer pump power input under the frequency conversion operating mode, kW; P
VF, moBe output power of motor under the frequency conversion operating mode, kW.
Step 106: calculate adjustable frequency motor efficient according to formula (7) through output power of motor under adjustable frequency motor power input and the frequency conversion operating mode.
In the formula: η
VF, meMotor efficiency under the frequency conversion operating mode, %; P
VF, moBe output power of motor under the frequency conversion operating mode, kW; P
VF, miBe motor input power under the frequency conversion operating mode, kW.
Step 107: the frequency conversion transfer pump unit efficiency model that obtains formula (8) through frequency conversion transfer pump efficient and adjustable frequency motor efficient calculates frequency conversion transfer pump unit efficiency.
η
VF＝η
VF,me·η
VF,pe （8）
In the formula, η
VFBe transfer pump unit efficiency under the frequency conversion operating mode, %.
As shown in Figure 3, be a kind of frequency conversion transfer pump unit efficiency proving installation block diagram of the present invention's proposition.Comprise:
Frequency conversion transfer pump efficient unit 31 is used to calculate frequency conversion transfer pump efficient;
Adjustable frequency motor power input unit 32 is used to calculate the adjustable frequency motor power input;
Transfer pump output power unit 33 under the frequency conversion operating mode is used to calculate transfer pump output power under the frequency conversion operating mode;
Transfer pump power input unit 34 under the frequency conversion operating mode is used for calculating transfer pump power input under the frequency conversion operating mode through transfer pump output power under the frequency conversion operating mode;
Output power of motor unit 35 under the frequency conversion operating mode is used for calculating output power of motor under the frequency conversion operating mode through transfer pump power input under the frequency conversion operating mode;
Adjustable frequency motor efficient unit 36 is used for calculating adjustable frequency motor efficient through output power of motor under adjustable frequency motor power input and the frequency conversion operating mode;
Frequency conversion transfer pump unit efficiency test cell 37 is tested frequency conversion transfer pump unit efficiency through frequency conversion transfer pump efficient and adjustable frequency motor efficient.
As shown in Figure 4, be frequency conversion transfer pump unit efficiency test cell composition frame chart in a kind of frequency conversion transfer pump unit efficiency proving installation of the present invention's proposition.Frequency conversion transfer pump unit efficiency test cell 37 comprises:
On-site parameters determination module 41 is used for confirming according to frequency conversion transfer pump unit efficiency model the on-site parameters of on-the-spot test needs;
Wherein, testing tool comprises electric power analyser, float type densimeter, VT500 type viscosity meter, CT6LSR type hand-held laser velocity gauge, FLUXUS F601 type portable flow meter and mercury-in-glass thermometer etc.The preferred HIOKI 3166 electric power analysers of electric power analyser, the preferred VT500 type of viscosity meter viscosity meter, the preferred CT6LSR type of laser velocity gauge hand-held laser velocity gauge, the preferred FLUXUS F601 of portable flow meter type portable flow meter.
The accuracy of testing tool should be satisfied: the class of accuracy of electric current should not be lower than 1.0 grades; The class of accuracy of voltage should not be lower than 1.0 grades; The class of accuracy of power factor should not be lower than 1.0 grades; The class of accuracy of active power should not be lower than 1.0 grades; The accuracy of frequency should not be lower than 1.0 grades; The voltage harmonic accuracy of test should meet the regulation of D5.3 money among the GB/T 14549; When measuring high voltage or big electric current frequency conversion actuator, supporting voltage, electrorheological send equipment that good frequency characteristic should be arranged, and the amplitude error of its introducing is not more than 5%, and phase angle error should be greater than 5 °.
Test parameter acquisition module 43 is used for testing through motor and transfer pump according to frequency conversion transfer pump unit efficiency model and obtains under motor test parameter, transfer pump test parameter, the frequency conversion operating mode transfer pump test parameter under the motor test parameter and frequency conversion operating mode;
Wherein, the motor test parameter comprises: input line voltage U
VF, lmi, V, incoming line electric current I
VF, lmi, A; Power factor,
Or power input P
VF, mi, kW.
The transfer pump test parameter comprises: the imported crude oil temperature T
VF, 1, ℃; Outlet crude oil temperature T
VF, 2, ℃; The imported crude oil pressure P
VF, pi, MPa; Outlet crude oil pressure P
VF, po, MPa; The density p of crude oil in the time of 20 ℃
20, kg/m
3Actual measurement crude oil volume flow Q, m
3/ h.
The main establishing criteria of parameter testing: GB/T 1884-2000 " crude oil and liquid petroleum product density experiment chamber determination method (densimeter method) "; SY/T 0520-2008 " viscosity of crude is measured the rotational viscosimeter balancing method "; JB/T 10391-2002 " People's Republic of China's machinery industry standard "; GB/T 1032-2005 " threephase asynchronous machine test method "; Q/SHGD0069-2002 " the energy-conservation detection method of transfer pump unit "; GB/T 1666-1996 " the energy-conservation detection method of pump class and liquid conveying system ".
In the transfer station that the SCADA system has been installed, if instrument meets precision and in turn(a)round in the station, then, read the technological parameter that needs, like parameters of electric power etc. from controlling chamber according to the data of SCADA system acquisition in the station.If the SCADA system is not installed by transfer station; The SCADA system perhaps has been installed still can not have satisfied the desired parameters measurement requirement; The correlate meter of required test parameter etc. is damaged or do not installed and measured to, instrument not enough like accuracy of instrument, needs to use the instrument and meter equipment that carries to carry out on-the-spot test or sampling back to the lab analysis chemical examination.
Motor parameter comprises voltage, electric current and power factor under the frequency conversion operating mode.Measure electric current, voltage and power factor method: gather in real time on the field, station of demonstration possessing parameters of electric power, supply switchgear building to read parameters of electric power in arriving at a station.Gather the field, station of demonstration in real time for not possessing parameters of electric power, on the connection terminal of transfer pump unit power distribution cabinet,, read motor input power P with the Japanese HIOKI E.E. product HIOKI of company 3166 electric power analyser test site
MiNumerical value.
The transfer pump parameter comprises out temperature, volumetric flow rate and pressure under the frequency conversion operating mode.Carry out the transfer pump unit and spend pump temperature differential method when test, at first import and export in the temperature-measuring casing and add conduction oil, test is immersed in the conduction oil fully, with microthermometer with the accuracy that guarantees that the transfer pump out temperature is measured at transfer pump.
Point for measuring temperature and pressure tap should be in the abundant development section of turnover transfer pump oil stream; Press the regulation of GB/T 33216-1989 " centrifugal pump, mixed-flow pump, axial flow pump and volute pump test method "; As shown in Figure 5, be transfer pump point for measuring temperature and Disposal of Pressure Detecting Point synoptic diagram in a kind of frequency conversion transfer pump unit efficiency method of testing that proposes in the present invention.The spacing of transfer pump inflow point point for measuring temperature and transfer pump import forward flange is more than or equal to 3 times inlet caliber D1; The spacing of pressure tap and transfer pump import forward flange is more than or equal to 2 times inlet caliber D1; The spacing of transfer pump exit point for measuring temperature and transfer pump outlet rear flange is more than or equal to 3 times outlet caliber D2, and the spacing that pressure tap and transfer pump export rear flange is more than or equal to 2 times outlet caliber D2.
The method of testing of volumetric flow rate: if the data of measurement instrument in the interior SCADA system acquisition station, station then read the crude oil volumetric flow rate through the SCADA system.In not possessing the station, during transfer pump flow collection condition, can use the portable flow meter to carry out flow measurement.Press regulation among the GB/T 33216-1989 " centrifugal pump, mixed-flow pump, axial flow pump and volute pump test method ", carry out measuring of crude oil volumetric flow rate under the frequency conversion operating mode.
On-site parameters acquisition module 44 is used to utilize instrument after the test to carry out on-the-spot test and obtains on-site parameters;
Oil density and viscosity of crude when wherein, the crude oil property parameter testing comprises 20 ℃.
1. oil density 20 ℃ the time
According to GB/T 1884-2000 " crude oil and liquid petroleum product density experiment chamber determination method (densimeter method) ", utilize densitometer test oil density ρ.
2. viscosity of crude
According to SY/T 0520-2008 " viscosity of crude is measured the rotational viscosimeter balancing method ", utilize viscosity meter instrumentation examination crude oil kinetic viscosity μ.
The rig-site utilization instance:
In August, 2011, chaste tree pipeline Wei Gang transfer station carried out the test of frequency conversion transfer pump unit efficiency in Wei to September, according to test data and efficiency result of calculation, analyzed Wei Gang transfer station frequency conversion transfer pump unit with ability level and energy-saving benefit.
1, Wei Gang transfer station frequency conversion transfer pump unit field test data
Be respectively 153m at flow
3/ h, 164m
3/ h, 175m
3/ h and 185m
3During/h, adopt power frequency and frequency conversion operating mode to move respectively, only provide the measurement data and the computation process of frequency conversion operating mode here.
1) institute's output oil rerum natura
Corresponding viscosity under density and the probe temperature of institute of sampling and testing Wei Gang transfer station output oil in the time of 20 ℃, concrete outcome is seen table 1.
Table 1 crude oil property parameter
2) transfer pump unit test data under the frequency conversion operating mode
(1) control transfer pump outlet valve aperture is 100%, and the adjusting frequency converter frequency is 37.0Hz, carries out the 1st Wei Gang transfer station efficiency test;
(2) regulating frequency converter frequency is 38.4Hz, carries out the 2nd efficiency test;
(3) regulating frequency converter frequency is 39.9Hz, carries out the 3rd efficiency test;
(4) regulating frequency converter frequency is 42.0Hz, carries out the test of the 4th efficiency.
The transfer pump field test data is seen table 2, and the motor field test data is seen table 3.
Transfer pump test parameter under the table 2 frequency conversion operating mode
Motor test parameter under the table 3 frequency conversion operating mode
2, transfer pump unit efficiency is calculated and is analyzed under the frequency conversion operating mode
1) efficiency is calculated
The actual efficient of dispatching from the factory when transfer pump is carried test with crude oil, when measuring this model transfer pump and carry clear water according to producer and the efficient during 162mPas crude oil, the viscosity of crude when testing carries out interpolation calculation tries to achieve, and specifically sees table 4.Wherein, the corresponding temperature of viscosity of crude is the mean value of transfer pump import and export crude oil temperature during test.Viscosity of crude during test carries out interpolation calculation to temperature and tries to achieve according to data in the table 4.
Efficiency is calculated and was adopted the pump temperature differential method under the frequency conversion operating mode, and concrete result of calculation is seen table 5, and transfer pump performance conversion value is carried out the analysis of transfer pump unit efficiency in the contrast table 4.
Transfer pump performance conversion value under the table 4 frequency conversion operating mode
Used the result of calculation of pump temperature differential method under the table 5 frequency conversion operating mode
Under the frequency conversion operating mode, the transfer pump efficient of using the pump temperature differential method to calculate is respectively 153m at oil flow
3/ h, 164m
3/ h, 175m
3/ h and 185m
3During/h, the efficient of dispatching from the factory when all being lower than clear water efficient and carrying actual crude oil, result of calculation is reasonable.
2) performance analysis
(1) used the pump temperature differential method to calculate transfer pump efficient, transfer pump efficient mean value is 67.41% under the frequency conversion operating mode, and transfer pump efficient mean value is 60.86% under the power frequency operating mode.Be respectively 153m at oil flow
3/ h, 164m
3/ h, 175m
3/ h and 185m
3During/h, transfer pump efficient is higher than transfer pump efficient under the power frequency operating mode under the frequency conversion operating mode.
Press the annual operation of transfer pump 8400h and calculate, oil flow is 153m
3During/h, the frequency conversion operating mode than power frequency operating mode with annual energy-conservation 1171.8MWh under the condition; Oil flow is 164m
3During/h, annual energy-conservation 976.6MWh; Oil flow is 175m
3During/h, annual energy-conservation 990.2MWh; Oil flow is 185m
3During/h, annual energy-conservation 855.1MWh; Wherein, economic benefit reaches as high as 93.7 ten thousand yuan every year.
(2) used pump temperature differential method calculating motor efficient, under the frequency conversion operating mode, oil flow is respectively 153m
3/ h, 164m
3/ h, 175m
3/ h and 185m
3During/h, motor efficiency is lower than motor efficiency under the power frequency operating mode.During frequency conversion condition calculating motor efficiency, frequency converter and motor are done as a whole consideration, himself also is an energy consumption equipment, consumes certain electric energy.
(3) used the pump temperature differential method to calculate the transfer pump unit efficiency, transfer pump unit efficiency mean value is 50.57% under the frequency conversion operating mode, and transfer pump unit efficiency mean value is 49.37% under the power frequency operating mode.Be respectively 153m at oil flow
3/ h, 164m
3/ w, 175m
3/ h and 185m
3During/h, the transfer pump unit efficiency is higher than transfer pump unit efficiency under the power frequency operating mode under the frequency conversion operating mode.
Press the annual operation of transfer pump 8400h and calculate, oil flow is 153m
3During/h, the frequency conversion operating mode than power frequency operating mode with annual energy-conservation 1215.6MWh under the condition; Oil flow is 164m
3During/h, annual energy-conservation 1232.87MWh; Oil flow is 175m
3During/h, annual energy-conservation 1114.4MWh; Oil flow is 185m
3During/h, annual energy-conservation 910.1MWh; Wherein, economic benefit reaches as high as 98.6 ten thousand yuan every year.
Above-described embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a frequency conversion transfer pump unit efficiency method of testing is characterized in that, comprising:
Calculate frequency conversion transfer pump efficient;
Calculate the adjustable frequency motor power input;
Calculate transfer pump output power under the frequency conversion operating mode;
Calculate transfer pump power input under the frequency conversion operating mode through transfer pump output power under the frequency conversion operating mode;
Calculate output power of motor under the frequency conversion operating mode through transfer pump power input under the frequency conversion operating mode;
Calculate adjustable frequency motor efficient through output power of motor under adjustable frequency motor power input and the frequency conversion operating mode;
Through frequency conversion transfer pump efficient and adjustable frequency motor efficient frequency conversion transfer pump unit efficiency is tested.
2. frequency conversion transfer pump unit efficiency method of testing according to claim 1 is characterized in that, said frequency conversion transfer pump unit efficiency the test through frequency conversion transfer pump efficient and adjustable frequency motor efficient comprises:
Confirm the on-site parameters of on-the-spot test needs according to frequency conversion transfer pump unit efficiency model;
Choose instrument according to on-site parameters, and the instrument of choosing is tested;
Test through motor and transfer pump according to frequency conversion transfer pump unit efficiency model and to obtain under motor test parameter, transfer pump test parameter, the frequency conversion operating mode transfer pump test parameter under the motor test parameter and frequency conversion operating mode;
Instrument after the utilization test carries out on-the-spot test and obtains on-site parameters;
According to transfer pump test parameter under motor test parameter and the frequency conversion operating mode under motor test parameter, transfer pump test parameter, on-site parameters, the frequency conversion operating mode, adopt frequency conversion transfer pump unit efficiency model to calculate to realize the test of frequency conversion transfer pump unit efficiency.
3. frequency conversion transfer pump unit efficiency method of testing according to claim 1 is characterized in that output power of motor comprises under the said calculating frequency conversion operating mode:
Power attenuation in the transmittance process is ignored; According to conservation of energy principle; Then the power of gear train output shaft equates with the power of input shaft; Be under the frequency conversion operating mode under output power of motor and the frequency conversion operating mode transfer pump power input equate that the transfer pump power input is obtained output power of motor under the frequency conversion operating mode under the frequency conversion operating mode that draws through transfer pump power input calculation procedure under the said frequency conversion operating mode.
4. according to the described frequency conversion transfer pump of the arbitrary claim of claim 1 ~ 3 unit efficiency method of testing, it is characterized in that said calculating adjustable frequency motor power input comprises:
Measure and calculate adjustable frequency motor power input desired parameters, according to calculation of parameter adjustable frequency motor power input.
5. want 4 described frequency conversion transfer pump unit efficiency method of testings according to right, it is characterized in that, the said method of measuring calculating adjustable frequency motor power input desired parameters is the electric energy meter method.
6. frequency conversion transfer pump unit efficiency method of testing according to claim 4 is characterized in that, the said method of measuring calculating adjustable frequency motor power input desired parameters is a current/voltage power factor method.
7. frequency conversion transfer pump unit efficiency method of testing according to claim 2 is characterized in that said instrument comprises: electric power analyser, float type densimeter, viscosity meter, hand-held laser velocity gauge, portable flow meter and mercury-in-glass thermometer.
8. frequency conversion transfer pump unit efficiency method of testing according to claim 2; It is characterized in that said transfer pump test parameter comprises imported crude oil temperature, outlet crude oil temperature, imported crude oil pressure, exports former oil pressure, oil density and actual measurement crude oil volumetric flow rate.
9. frequency conversion transfer pump unit efficiency method of testing according to claim 2 is characterized in that the transfer pump test parameter comprises out temperature, pressure and volumetric flow rate under the said frequency conversion operating mode.
10. a frequency conversion transfer pump unit efficiency proving installation is characterized in that, comprising:
Frequency conversion transfer pump efficient unit is used to calculate frequency conversion transfer pump efficient;
Adjustable frequency motor power input unit is used to calculate the adjustable frequency motor power input;
Transfer pump output power unit under the frequency conversion operating mode is used to calculate transfer pump output power under the frequency conversion operating mode;
Transfer pump power input unit under the frequency conversion operating mode is used for calculating transfer pump power input under the frequency conversion operating mode through transfer pump output power under the frequency conversion operating mode;
Output power of motor unit under the frequency conversion operating mode is used for calculating output power of motor under the frequency conversion operating mode through transfer pump power input under the frequency conversion operating mode;
Adjustable frequency motor efficient unit is used for calculating adjustable frequency motor efficient through output power of motor under adjustable frequency motor power input and the frequency conversion operating mode;
Frequency conversion transfer pump unit efficiency test cell is tested frequency conversion transfer pump unit efficiency through frequency conversion transfer pump efficient and adjustable frequency motor efficient.
11. frequency conversion transfer pump unit efficiency proving installation according to claim 10 is characterized in that, said frequency conversion transfer pump unit efficiency test cell comprises:
The on-site parameters determination module is used for confirming according to frequency conversion transfer pump unit efficiency model the on-site parameters of on-the-spot test needs;
The instrument test module is used for choosing instrument according to on-site parameters, and the instrument of choosing is tested;
The test parameter acquisition module is used for testing through motor and transfer pump according to frequency conversion transfer pump unit efficiency model and obtains under motor test parameter, transfer pump test parameter, the frequency conversion operating mode transfer pump test parameter under the motor test parameter and frequency conversion operating mode;
The on-site parameters acquisition module is used to utilize instrument after the test to carry out on-the-spot test and obtains on-site parameters;
The efficiency acquisition module; Be used for according to transfer pump test parameter under motor test parameter and the frequency conversion operating mode under motor test parameter, transfer pump test parameter, on-site parameters, the frequency conversion operating mode, adopt frequency conversion transfer pump unit efficiency model to calculate to realize the test of frequency conversion transfer pump unit efficiency.
12. frequency conversion transfer pump unit efficiency proving installation according to claim 10 is characterized in that, the output power of motor unit calculates that output power of motor comprises under the frequency conversion operating mode under the said frequency conversion operating mode:
Power attenuation in the transmittance process is ignored; According to conservation of energy principle; Then the power of gear train output shaft equates with the power of input shaft; Be under the frequency conversion operating mode under output power of motor and the frequency conversion operating mode transfer pump power input equate that the transfer pump power input is obtained output power of motor under the frequency conversion operating mode under the frequency conversion operating mode that draws through transfer pump power input calculation procedure under the said frequency conversion operating mode.
13., it is characterized in that said adjustable frequency motor power input unit calculates the adjustable frequency motor power input and comprises according to the described frequency conversion transfer pump of the arbitrary claim of claim 10 ~ 12 unit efficiency proving installation:
Measure and calculate adjustable frequency motor power input desired parameters, according to calculation of parameter adjustable frequency motor power input.
14. frequency conversion transfer pump unit efficiency proving installation according to claim 11; It is characterized in that said instrument test module is chosen instrument and comprised: electric power analyser, float type densimeter, viscosity meter, hand-held laser velocity gauge, portable flow meter and mercury-in-glass thermometer.
15. frequency conversion transfer pump unit efficiency proving installation according to claim 11; It is characterized in that the transfer pump test parameter that said test parameter acquisition module obtains comprises imported crude oil temperature, outlet crude oil temperature, imported crude oil pressure, exports former oil pressure, oil density and actual measurement crude oil volumetric flow rate.
16. frequency conversion transfer pump unit efficiency proving installation according to claim 11 is characterized in that the transfer pump test parameter comprises out temperature, pressure and volumetric flow rate under the frequency conversion operating mode that said test parameter acquisition module obtains.
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| CN104895777B (en) * | 2015-05-11 | 2017-03-22 | 中国石油天然气集团公司 | Method and device for determining dynamic mechanical efficiency of compressor |
| CN104950259A (en) * | 2015-07-09 | 2015-09-30 | 中国电力科学研究院 | Method and system for detecting rated energy efficiency of high-voltage and high-power asynchronous motor |
| CN105207560A (en) * | 2015-09-07 | 2015-12-30 | 安徽大学 | Asynchronous motor-diagonal flow pump system modeling method |
| CN107642485B (en) * | 2016-12-01 | 2018-10-23 | 中国石油化工股份有限公司 | Frequency conversion type oil-immersed pump Efficiency test method |
| CN107642485A (en) * | 2016-12-01 | 2018-01-30 | 中国石油化工股份有限公司 | Frequency conversion type oil-immersed pump Efficiency test method |
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| CN107420142B (en) * | 2017-05-15 | 2019-03-19 | 西安热工研究院有限公司 | A kind of Turbine Cold Junction optimization progress control method following pump based on frequency conversion |
| CN110411632A (en) * | 2018-04-28 | 2019-11-05 | 财团法人金属工业研究发展中心 | The characteristic analysis system of rotating device |
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| CN112734146A (en) * | 2019-10-28 | 2021-04-30 | 广州汽车集团股份有限公司 | Method for calculating efficiency of automobile transmission, computer equipment and storage medium |
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