CN116624375A - Transition process field test method and system for high-lift pump station - Google Patents

Transition process field test method and system for high-lift pump station Download PDF

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Publication number
CN116624375A
CN116624375A CN202310664768.8A CN202310664768A CN116624375A CN 116624375 A CN116624375 A CN 116624375A CN 202310664768 A CN202310664768 A CN 202310664768A CN 116624375 A CN116624375 A CN 116624375A
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China
Prior art keywords
frequency
frequency converter
converter unit
unit
strategy
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CN202310664768.8A
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CN116624375B (en
Inventor
李营
化全利
刘凯华
刘秋生
刘金龙
郝爽
王浩
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Beijing Golden River Water Conservancy Construction Group Co ltd
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Beijing Golden River Water Conservancy Construction Group Co ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/54—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting two or more dynamo-electric motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors

Abstract

The invention provides a transition process field test method and system of a high-lift pump station. The high-lift pump station transition process field test method comprises the following steps: extracting a specific type of a transition test task to be executed currently, wherein the specific type comprises a normal start-up transition process test of a unit, a normal stop transition process test of the unit, a fault stop transition process test of the unit, an accident stop transition process test of the unit and a reverse rotating speed test of the unit; extracting the number of the frequency converter units corresponding to the specific type of the transition test task to be executed currently; aiming at the number of the frequency conversion units of the high-lift pump station, performing transient process field test on the running state and state switching of the frequency conversion units by utilizing a frequency conversion unit debugging strategy; performing transient process field test on the hydraulic valve by utilizing a hydraulic valve adjusting strategy; and performing transition process field test aiming at the starting of the frequency converter.

Description

Transition process field test method and system for high-lift pump station
Technical Field
The invention provides a transition process field test method and system of a high-lift pump station, and belongs to the technical field of field test.
Background
The high-lift pump station refers to a pump station which needs to overcome the larger lift. In the pump station transition process, in order to ensure the continuity and stability of water flow, the pump station needs to be subjected to field test. The field test system generally consists of a sensor, a data collector, a data processor, a display and the like. The sensor is used for monitoring parameters such as water flow, water pressure and water level, the data acquired by the sensor are transmitted to the data processor in real time by the data acquisition device, the data processor processes and analyzes the data, and the performance curve of the pump station and the variation trend of each parameter are displayed, so that whether the working state and the performance of the pump station meet the design requirements or not is evaluated. In the prior art, repeated testing and debugging easily occur on the field adjustment test of the frequency converter and the hydraulic control slow closing valve of the high-lift pump station, so that the problem of lower testing efficiency occurs.
Disclosure of Invention
The invention provides a transition process field test method and a transition process field test system for a high-lift pump station, which are used for solving the problem that in the prior art, repeated test and debugging are easy to occur to field adjustment test of a frequency converter and a hydraulic control slow closing valve of the high-lift pump station, so that the test efficiency is low, and the adopted technical scheme is as follows:
A transition site test method for a high-lift pump station, the high-lift pump station transition site test method comprising:
extracting a specific type of a transition test task to be executed currently, wherein the specific type comprises a normal start-up transition process test of a unit, a normal stop transition process test of the unit, a fault stop transition process test of the unit, an accident stop transition process test of the unit and a reverse rotating speed test of the unit;
extracting the number of the frequency converter units corresponding to the specific type of the transition test task to be executed currently;
aiming at the number of the frequency conversion units of the high-lift pump station, performing transient process field test on the running state and state switching of the frequency conversion units by utilizing a frequency conversion unit debugging strategy; the frequency conversion unit debugging strategy comprises a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies, a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies and a frequency conversion-power frequency strategy; the first-to-second frequency conversion strategy comprises a frequency conversion to second frequency conversion sub-strategy and a frequency conversion to power frequency to frequency conversion sub-strategy; the two-to-one frequency conversion strategy comprises a two-to-one frequency conversion sub-strategy and a one-to-one frequency conversion sub-strategy.
Performing transient process field test on the hydraulic valve by utilizing a hydraulic valve adjusting strategy; the hydraulic valve regulation strategy comprises a pressure regulation strategy, a sensor regulation strategy and a frequency converter regulation strategy;
the method comprises the steps of performing transition process field test aiming at the starting of the frequency converter, specifically, controlling the total starting time of the frequency converter to be about 10s by combining the starting condition of the hydraulic control valve and referring to a soft starting mode, a slope starting mode and a whole process starting mode.
Further, to the frequency conversion unit quantity of high-lift pump station, utilize frequency conversion unit debugging tactics to carry out the field test of transient process to the frequency conversion unit, include:
scanning a frequency converter unit to be tested to obtain the number of the frequency converter units to be tested and the number of power frequency power supplies in the frequency converter unit;
and selecting a frequency converter unit debugging strategy according to the number of the frequency converter units to be tested and the number of the power frequency power supplies in the frequency converter units to carry out transient process field test on the frequency converter units.
Further, the transient process field test method of the one-frequency-to-two-frequency-conversion sub-strategy comprises the following steps:
extracting the two frequency converter units to be tested, and marking the two frequency converter units as a first frequency converter unit and a second frequency converter unit;
Adjusting the frequency of the first frequency converter unit to a first frequency value;
keeping the first frequency converter unit to continuously operate for a first waiting time at the first frequency value, and waiting for the second frequency converter unit to start; the waiting time of the second frequency converter unit is the first waiting time; the first waiting time is obtained by the following formula:
wherein T is 1 Representing a first waiting time; f (f) 1 And f 2 Representing rated frequencies corresponding to the first frequency converter unit and the second frequency converter unit; j (J) 1 And J 2 Respectively representing motor inertial loads corresponding to the first frequency converter unit and the second frequency converter unit; a, a 1 And a 2 Respectively representing the maximum acceleration of the first frequency converter unit and the second frequency converter unit; t (T) 01 The method comprises the steps of representing the duration of time for reaching a first frequency value after a first frequency converter unit is started; t is t 1 And t 2 The starting experience time of the first frequency converter unit and the second frequency converter unit is respectively represented; n is n 1 And n 2 Respectively representing the target motor rotation speeds after the first frequency converter unit and the second frequency converter unit are started; p is p 1 And p 2 Representing the pole pair numbers of the motors of the first frequency converter unit and the second frequency converter unit; sqrt () represents square root operationCalculating;
starting the second frequency converter unit when the first waiting time is over, and directly adjusting the frequency value of the second frequency converter unit to the first frequency value;
When the operating frequency of the second frequency converter unit reaches the first frequency value, the two frequency converter units are adjusted to an operating state that the two frequency converters are rated at the same time;
when the rated frequency specifications of the two frequency converter units are the same, the first frequency value is 80% f, and f represents the rated frequency of the frequency converter unit; when the rated frequency specifications of the two frequency converter units are different, acquiring the first frequency value by using a first frequency setting model, wherein the first frequency setting model is as follows:
wherein F is 1 Representing a first frequency value obtained by a first frequency setting model; f (F) 01 And representing the value of the first frequency value corresponding to the same rated frequency specification of the two frequency converter units.
Further, the transient process field test method of the one-frequency-to-one power frequency-to-one frequency sub-strategy comprises the following steps:
extracting a frequency converter unit and a power frequency unit to be tested;
adjusting the frequency of the frequency converter unit to a second frequency value;
keeping the variable frequency unit to continuously operate for a second waiting time at the second frequency value, and waiting for the power frequency unit to start; the power frequency unit waiting time is the second waiting time; the second waiting time is obtained by the following formula:
Wherein T is 2 Representing a second waiting time; j represents the inertial load of the motor corresponding to the frequency converter unit; a represents the maximum acceleration of the frequency converter unit; Δa represents the corresponding maximum acceleration variation amplitude when acceleration is unstable under the condition of maximum acceleration of the frequency converter unit; t (T) w1 Representing theoretical stable operation time length for adjusting the frequency converter unit to a second frequency value;
starting the power frequency unit when the second waiting time is over, and directly adjusting the frequency value of the frequency converter unit to the third frequency value;
the second frequency value is 85% f, the value range of the third frequency value is 90% f-100% f, and f represents the rated frequency of the frequency converter unit.
Further, the transition process field test method of the two-frequency-to-one-frequency sub-strategy comprises the following steps:
extracting the two frequency converter units to be tested, and marking the two frequency converter units as a first frequency converter unit and a second frequency converter unit;
adjusting the frequency of the first frequency converter unit to a fourth frequency value;
keeping the first frequency converter unit to continuously operate for a third waiting time at the fourth frequency value, and waiting for the second frequency converter unit to stop; the waiting time of the second frequency converter unit is the third waiting time; the third waiting time is obtained by the following formula:
Wherein T is 1 Representing a first waiting time; f (f) 1 And f 2 Representing rated frequencies corresponding to the first frequency converter unit and the second frequency converter unit; j (J) 1 And J 2 Respectively representing motor inertial loads corresponding to the first frequency converter unit and the second frequency converter unit; a, a 1 And a 2 Respectively representing the maximum acceleration of the first frequency converter unit and the second frequency converter unit; t (T) 02 Indicating that the first frequency converter set reaches the first frequency after being startedThe duration of the four frequency values; t (T) a2 Indicating the acceleration time length when the first frequency converter set reaches a fourth frequency value after being started; t is t 1 And t 2 The starting experience time of the first frequency converter unit and the second frequency converter unit is respectively represented; n is n 1 And n 2 Respectively representing the target motor rotation speeds after the first frequency converter unit and the second frequency converter unit are started; p is p 1 And p 2 Representing the pole pair numbers of the motors of the first frequency converter unit and the second frequency converter unit; sqrt () represents a square root operation;
when the second frequency converter unit is stopped, switching to an operating state of the frequency converter unit;
when the rated frequency specifications of the two frequency converter units are the same, the fourth frequency value is 80% f, and f represents the rated frequency of the frequency converter unit; when the rated frequency specifications of the two frequency converter units are different, a fourth frequency setting model is utilized to obtain a fourth frequency value, and the fourth frequency setting model is as follows:
Wherein F is 4 Representing a fourth frequency value obtained by a fourth frequency setting model; f (F) 04 Representing the value of the fourth frequency value corresponding to the same rated frequency specification of the two frequency converter units; t (T) 04 Indicating the duration of time for reaching the fourth frequency value after the first frequency converter set is started; t (T) t1 And the time length for stopping the second frequency converter unit is represented.
Further, the transient process field test method for the variable frequency-variable power frequency-variable frequency sub-strategy comprises the following steps:
extracting a frequency converter unit and a power frequency unit to be tested;
adjusting the frequency of the frequency converter unit to a fifth frequency value;
keeping the frequency unit to continuously run for a fourth waiting time at the fifth frequency value, and waiting for the power frequency unit to stop; the power frequency unit waiting time is the fourth waiting time; the fourth waiting time is obtained by the following formula:
wherein T is 4 Representing a fourth waiting time; j represents the inertial load of the motor corresponding to the frequency converter unit; a represents the maximum acceleration of the frequency converter unit; Δa represents the corresponding maximum acceleration variation amplitude when acceleration is unstable under the condition of maximum acceleration of the frequency converter unit; t (T) w2 Representing theoretical stable operation time length for adjusting the frequency converter unit to a fifth frequency value;
When the power frequency unit is stopped, the frequency of the frequency converter unit is adjusted to be a sixth frequency value, and the frequency is switched to an operating state of the frequency converter unit;
the value of the fifth frequency value is 90% f, the value range of the sixth frequency value is 75% f-85% f, and f represents the rated frequency of the frequency converter unit.
Further, the one frequency conversion strategy, the two frequency conversion strategy and the one frequency conversion one power frequency strategy are as follows:
the one frequency conversion strategy is as follows: when only one frequency converter unit operates, the frequency conversion adjusting range of the frequency converter unit is 75-85% f, and the flow adjusting range of the water pump is 3.3m 3 /s-4.9m 3 /s；
The two frequency conversion strategies are as follows: when two frequency conversion units run simultaneously, the frequency conversion adjusting range of the frequency conversion units is 78-100% f, and the flow adjusting range of the water pump is 6m 3 /s-10m 3 S, two frequency conversion are kept at the same frequency and are adjusted together;
the frequency conversion and power frequency strategy is as follows: when a frequency converter unit and a power frequency unit are operated simultaneously, the frequency conversion adjusting range of the frequency converter unit is 90-100% f, and the flow adjusting range of the water pump is 9.2m 3 /s-10m 3 /s。
Further, the transient process field test method for the hydraulic valve by using the pressure regulation strategy comprises the following steps:
monitoring the pump outlet pressure and the hydraulic control slow closing valve outlet pressure in real time, and obtaining a pump outlet pressure value and a hydraulic control slow closing valve outlet pressure value;
And obtaining a pressure difference between the pump outlet pressure value and the hydraulic control slow closing valve outlet pressure value through difference calculation, and opening the hydraulic control slow closing valve when the pressure difference is 0.
Further, the transient process field test method for the hydraulic valve by utilizing the frequency converter adjustment strategy comprises the following steps:
after the frequency converter unit is started, the frequency converter unit is regulated to a stage fixed frequency;
when the frequency converter sets are all regulated to a stage fixed frequency, the hydraulic control slow closing valve is controlled to be opened automatically;
after the hydraulic control slow-closing valve is automatically opened, the operating frequency of the frequency converter unit is adjusted, and the operating frequency of the frequency converter unit is adjusted to the target operating frequency of the frequency converter unit;
the phase fixed frequency is obtained through the following formula;
wherein F is a Representing a phase fixed frequency; f (F) y Indicating the starting critical frequency of the opening of the hydraulic control slow closing valve; f (F) d Representing the target operating frequency of the frequency converter unit; c represents the number of poles of the motor of the frequency converter unit; k (K) a And K b The sub-table shows the flow coefficient and pressure coefficient required by the opening of the hydraulic control slow-closing valve.
A transitional process field test system of a high lift pump station, the transitional process field test system comprising:
The type extraction module is used for extracting the specific type of the transition test task to be executed currently, wherein the specific type comprises a normal start-up transition process test of a unit, a normal stop transition process test of the unit, a fault stop transition process test of the unit, an accident stop transition process test of the unit and a reverse rotating speed test of the unit;
the quantity extraction module is used for extracting the quantity of the frequency converter units corresponding to the specific type of the transition test task to be executed currently;
the first test module is used for performing transition process field test on the running state and state switching of the frequency conversion units by utilizing a frequency conversion unit debugging strategy according to the number of the frequency conversion units of the high-lift pump station; the frequency conversion unit debugging strategy comprises a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies, a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies and a frequency conversion-power frequency strategy; the first-to-second frequency conversion strategy comprises a frequency conversion to second frequency conversion sub-strategy and a frequency conversion to power frequency to frequency conversion sub-strategy; the two-to-one frequency conversion strategy comprises a two-to-one frequency conversion sub-strategy and a one-to-one frequency conversion sub-strategy.
The second testing module is used for carrying out transition process field testing on the hydraulic valve by utilizing a hydraulic valve adjusting strategy; the hydraulic valve regulation strategy comprises a pressure regulation strategy, a sensor regulation strategy and a frequency converter regulation strategy;
The third test module is used for performing transient process field test on the starting of the frequency converter, specifically, the starting of the frequency converter is combined with the starting condition of the hydraulic control valve, the soft starting mode, the slope starting mode and the whole process starting mode are referred to, and the total starting time of the frequency converter is controlled to be about 10 s.
The invention has the beneficial effects that:
the invention provides a transition process field test method and a transition process field test system for a high-lift pump station. By utilizing the hydraulic valve regulation strategy to carry out the transient process field test, the optimal control parameters can be determined so as to ensure the reliability and stability of the hydraulic valve, thereby improving the stability and safety of the system. By performing the transient process field test aiming at the starting of the frequency converter, whether the starting of the frequency converter is normal or not can be judged, and the potential fault problem can be found and solved in time, so that the reliability and stability of the system are improved, and the maintenance cost is reduced.
Drawings
FIG. 1 is a flow chart of a transition process field test method of a high lift pump station according to the present invention;
FIG. 2 is a second flow chart of a transitional process field test method of a high-lift pump station according to the present invention;
FIG. 3 is a flow chart III of a transitional process field test method of a high-lift pump station according to the invention;
fig. 4 is a system block diagram of a transitional process field test system of a high-lift pump station according to the invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The embodiment of the invention provides a transition process field test method of a high-lift pump station, as shown in fig. 1, comprising the following steps:
s1, extracting specific types of transition test tasks to be executed currently, wherein the specific types comprise a normal start-up transition process test of a unit, a normal stop transition process test of the unit, a fault stop transition process test of the unit, an accident stop transition process test of the unit and a reverse rotating speed test of the unit; the unit refers to a pump station integral unit comprising a frequency conversion unit, a power frequency unit, a hydraulic valve and other pump station equipment.
S2, extracting the number of the frequency converter units corresponding to the specific type of the transition test task to be executed currently;
s3, performing transient process field test on the running state and state switching of the frequency conversion units by utilizing a frequency conversion unit debugging strategy according to the number of the frequency conversion units of the high-lift pump station; the frequency conversion unit debugging strategy comprises a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies, a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies and a frequency conversion-power frequency strategy; the first-to-second frequency conversion strategy comprises a frequency conversion to second frequency conversion sub-strategy and a frequency conversion to power frequency to frequency conversion sub-strategy; the two-to-one frequency conversion strategy comprises a two-to-one frequency conversion sub-strategy and a one-to-one frequency conversion sub-strategy.
S4, performing on-site test on the transition process of the hydraulic valve by utilizing a hydraulic valve adjusting strategy; the hydraulic valve regulation strategy comprises a pressure regulation strategy, a sensor regulation strategy and a frequency converter regulation strategy;
s5, performing transition process field test aiming at the starting of the frequency converter, specifically, controlling the total starting time of the frequency converter to be about 10S by combining the starting condition of the hydraulic control valve and referring to a soft starting mode, a slope starting mode and a whole process starting mode.
The working principle and the effect of the technical scheme are as follows: aiming at the number of the frequency conversion units of the high-lift pump station, different frequency conversion unit debugging strategies are utilized to carry out transient process field test on the running state and state switching of the frequency conversion units. The frequency conversion unit debugging strategy comprises a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies, a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies and a frequency conversion and power frequency strategy of one frequency conversion. The first-to-second frequency conversion strategy comprises a first-to-second frequency conversion sub-strategy and a first-to-first power frequency-to-first frequency conversion sub-strategy; the two-to-one frequency conversion strategy comprises a two-to-one frequency conversion sub-strategy and a one-to-one frequency conversion sub-strategy. By testing different frequency converter unit debugging strategies, an optimal operation mode can be determined, so that the operation efficiency of a pump station is improved, energy conservation and emission reduction are realized. And performing transient process field test on the hydraulic valve by utilizing a hydraulic valve regulating strategy. The hydraulic valve modulation strategy includes a pressure modulation strategy, a sensor modulation strategy, and a frequency converter modulation strategy. By testing different hydraulic valve adjustment strategies, optimal control parameters may be determined to ensure reliability and stability of the hydraulic valve. And performing transition process field test aiming at the starting of the frequency converter. By testing parameters such as current, voltage, frequency and the like in the starting process of the frequency converter, whether the frequency converter is started normally or not and whether abnormal conditions exist or not can be judged. According to the test result, the control parameters of the frequency converter can be adjusted to ensure the normal operation of the frequency converter.
The embodiment provides a transition process field test method of a high-lift pump station, which can determine an optimal operation mode by carrying out field test of a frequency conversion unit debugging strategy aiming at the number of frequency conversion units of the high-lift pump station, so that the operation efficiency of the pump station and the energy-saving and emission-reduction effects are improved. By utilizing the hydraulic valve regulation strategy to carry out the transient process field test, the optimal control parameters can be determined so as to ensure the reliability and stability of the hydraulic valve, thereby improving the stability and safety of the system. By performing the transient process field test aiming at the starting of the frequency converter, whether the starting of the frequency converter is normal or not can be judged, and the potential fault problem can be found and solved in time, so that the reliability and stability of the system are improved, and the maintenance cost is reduced.
In one embodiment of the present invention, as shown in fig. 2, for the number of frequency converter units of the high-lift pump station, a transient process field test is performed on the frequency converter units by using a frequency converter unit debugging strategy, including:
s101, scanning a frequency converter unit to be tested to obtain the number of the frequency converter unit to be tested and the number of power frequency power supplies in the frequency converter unit;
s102, selecting a frequency converter unit debugging strategy according to the number of the frequency converter units to be tested and the number of the power frequency power supplies in the frequency converter units, and performing transient process field test on the frequency converter units.
Specifically, the transient process field test method of the primary frequency conversion to secondary frequency conversion sub-strategy comprises the following steps:
step 1a, extracting the two frequency converter units to be tested, and marking the two frequency converter units as a first frequency converter unit and a second frequency converter unit;
step 2a, adjusting the frequency of the first frequency converter unit to a first frequency value;
step 3a, keeping the first frequency converter unit to continuously operate for a first waiting time at the first frequency value, and waiting for the second frequency converter unit to start; the waiting time of the second frequency converter unit is the first waiting time; the first waiting time is obtained by the following formula:
wherein T is 1 Representing a first waiting time; f (f) 1 And f 2 Representing rated frequencies corresponding to the first frequency converter unit and the second frequency converter unit; j (J) 1 And J 2 Respectively representing motor inertial loads corresponding to the first frequency converter unit and the second frequency converter unit; a, a 1 And a 2 Respectively representing the maximum acceleration of the first frequency converter unit and the second frequency converter unit; t (T) 01 The method comprises the steps of representing the duration of time for reaching a first frequency value after a first frequency converter unit is started; t is t 1 And t 2 The starting experience time of the first frequency converter unit and the second frequency converter unit is respectively represented; n is n 1 And n 2 Respectively representing the target motor rotation speeds after the first frequency converter unit and the second frequency converter unit are started; p is p 1 And p 2 Representing the pole pair numbers of the motors of the first frequency converter unit and the second frequency converter unit; sqrt () represents a square root operation;
step 4a, starting the second frequency converter unit when the first waiting time is over, and directly adjusting the frequency value of the second frequency converter unit to the first frequency value;
step 5a, when the operating frequency of the second frequency converter unit reaches the first frequency value, adjusting the two frequency converter units to an operating state that the two frequency converters are rated at the same time;
when the rated frequency specifications of the two frequency converter units are the same, the first frequency value is 80% f, and f represents the rated frequency of the frequency converter unit; when the rated frequency specifications of the two frequency converter units are different, acquiring the first frequency value by using a first frequency setting model, wherein the first frequency setting model is as follows:
wherein F is 1 Representing a first frequency setting modeA first frequency value obtained by the model; f (F) 01 And representing the value of the first frequency value corresponding to the same rated frequency specification of the two frequency converter units.
The working principle and the effect of the technical scheme are as follows: the waiting time is calculated through a formula, and factors such as inertial load and maximum acceleration of a motor of the frequency converter unit are considered, so that reasonable waiting time is obtained, and stability can be kept when the frequency converter unit is switched. In the switching process, the frequency of the first frequency converter unit is adjusted to a first frequency value, the second frequency converter unit is waited for to start, then the frequency of the second frequency converter unit is directly adjusted to the first frequency value, and finally the two frequency converter units are adjusted to the running state that the two frequency converters are rated at the same time, so that the accuracy of frequency adjustment is ensured. Aiming at the condition that the rated frequency specifications are different, a first frequency value is obtained through a first frequency setting model, so that accurate matching between two frequency converter units is realized. When the rated frequency specifications of the two frequency converter units are the same, the value of the first frequency value is 80% f, so that the stability and the reliability of the system are ensured.
Meanwhile, through the arrangement of the first frequency value, the test value adjustment rationality can be effectively improved, the test transition time is shortened to the maximum extent on the premise of ensuring the operation safety of equipment, and the test efficiency is improved. On the other hand, the waiting time and the adjusted frequency value obtained by the formula can be matched when the waiting time setting and the adjusted frequency value are placed in the actual parameter condition of the equipment, so that the rationality of the waiting time setting and the adjusted frequency value setting is improved, and the problem that the safety of the excessive test is poor due to the unreasonable waiting time setting and the adjusted frequency value setting is prevented. Moreover, through the setting of the waiting time, the problems that the waiting time is too long to cause lower testing efficiency and the transition time is too long can be prevented from occurring, and the problems that the waiting time is too short to cause the equipment to debug and run stably and excessively for a short time to cause the potential safety hazard to increase can be prevented from occurring. Meanwhile, the frequency value can be adjusted to effectively prevent the problems that the test efficiency is low, the transition time is too long and the optimal production index of equipment operation cannot be achieved due to the fact that the frequency value is set too low, and meanwhile, the potential safety hazard is increased due to the fact that the frequency value is set too high.
In one embodiment of the invention, the transient process field test method for the one-frequency-to-one-power-frequency sub-strategy comprises the following steps:
step 1b, extracting a frequency converter unit and a power frequency unit to be tested;
step 2b, adjusting the frequency of the frequency converter unit to a second frequency value;
step 3b, keeping the variable frequency unit to continuously operate for a second waiting time at the second frequency value, and waiting for the power frequency unit to start; the power frequency unit waiting time is the second waiting time; the second waiting time is obtained by the following formula:
wherein T is 2 Representing a second waiting time; j represents the inertial load of the motor corresponding to the frequency converter unit; a represents the maximum acceleration of the frequency converter unit; Δa represents the corresponding maximum acceleration variation amplitude when acceleration is unstable under the condition of maximum acceleration of the frequency converter unit; t (T) w1 Representing theoretical stable operation time length for adjusting the frequency converter unit to a second frequency value;
step 4b, starting the power frequency unit when the second waiting time is over, and directly adjusting the frequency value of the frequency converter unit to the third frequency value;
the second frequency value is 85% f, the value range of the third frequency value is 90% f-100% f, and f represents the rated frequency of the frequency converter unit.
The working principle and the effect of the technical scheme are as follows: the operation stability of the frequency converter unit under different frequencies can be tested, so that whether the frequency converter unit meets the design requirements or not is detected. The synchronous performance of the two frequency conversion units is tested by simultaneously operating the two frequency conversion units and adjusting the frequency to the rated frequency, so that the reliability of the frequency conversion units under the condition of multi-unit operation is ensured. The frequency value of the frequency converter unit is regulated, the acceleration of the frequency converter unit under different frequencies is tested to detect whether the acceleration meets the design requirement, and the running stability and the synchronization performance of the frequency converter unit under different frequencies are verified by comparing the frequency converter unit with the power frequency unit. The required waiting time and frequency value are calculated by adopting the mathematical model, so that the automation and the accuracy of the test can be realized, and the test efficiency and the test accuracy are improved.
Meanwhile, through the arrangement of the second frequency value and the third frequency value, the adjustment rationality of the test numerical value can be effectively improved, the test transition time is shortened to the maximum extent on the premise of ensuring the operation safety of equipment, and the test efficiency is improved. On the other hand, the waiting time and the adjusted frequency value obtained by the formula can be matched when the waiting time setting and the adjusted frequency value are placed in the actual parameter condition of the equipment, so that the rationality of the waiting time setting and the adjusted frequency value setting is improved, and the problem that the safety of the excessive test is poor due to the unreasonable waiting time setting and the adjusted frequency value setting is prevented. Moreover, through the setting of the waiting time, the problems that the waiting time is too long to cause lower testing efficiency and the transition time is too long can be prevented from occurring, and the problems that the waiting time is too short to cause the equipment to debug and run stably and excessively for a short time to cause the potential safety hazard to increase can be prevented from occurring. Meanwhile, the frequency value can be adjusted to effectively prevent the problems that the test efficiency is low, the transition time is too long and the optimal production index of equipment operation cannot be achieved due to the fact that the frequency value is set too low, and meanwhile, the potential safety hazard is increased due to the fact that the frequency value is set too high.
In one embodiment of the present invention, the transient process field test method for the two-to-one sub-strategy includes:
step 1c, extracting the two frequency converter units to be tested, and marking the two frequency converter units as a first frequency converter unit and a second frequency converter unit;
step 2c, adjusting the frequency of the first frequency converter unit to a fourth frequency value;
step 3c, keeping the first frequency converter unit to continuously operate for a third waiting time at the fourth frequency value, and waiting for the second frequency converter unit to stop; the waiting time of the second frequency converter unit is the third waiting time; the third waiting time is obtained by the following formula:
wherein T is 1 Representing a first waiting time; f (f) 1 And f 2 Representing rated frequencies corresponding to the first frequency converter unit and the second frequency converter unit; j (J) 1 And J 2 Respectively representing motor inertial loads corresponding to the first frequency converter unit and the second frequency converter unit; a, a 1 And a 2 Respectively representing the maximum acceleration of the first frequency converter unit and the second frequency converter unit; t (T) 02 Indicating the duration of time for reaching the fourth frequency value after the first frequency converter set is started; t (T) a2 Indicating the acceleration time length when the first frequency converter set reaches a fourth frequency value after being started; t is t 1 And t 2 The starting experience time of the first frequency converter unit and the second frequency converter unit is respectively represented; n is n 1 And n 2 Respectively representing the target motor rotation speeds after the first frequency converter unit and the second frequency converter unit are started; p is p 1 And p 2 Representing the pole pair numbers of the motors of the first frequency converter unit and the second frequency converter unit; sqrt () represents a square root operation;
step 4c, switching to an operation state of operation of the frequency converter unit after the second frequency converter unit is stopped;
when the rated frequency specifications of the two frequency converter units are the same, the fourth frequency value is 80% f, and f represents the rated frequency of the frequency converter unit; when the rated frequency specifications of the two frequency converter units are different, a fourth frequency setting model is utilized to obtain a fourth frequency value, and the fourth frequency setting model is as follows:
wherein F is 4 Representing a fourth frequency value obtained by a fourth frequency setting model; f (F) 04 Representing the value of the fourth frequency value corresponding to the same rated frequency specification of the two frequency converter units; t (T) 04 Indicating the duration of time for reaching the fourth frequency value after the first frequency converter set is started; t (T) t1 And the time length for stopping the second frequency converter unit is represented.
The working principle and the effect of the technical scheme are as follows: the technical scheme can test the performance of the two frequency converter units and determine whether the two frequency converter units can be switched during operation. The method comprises the steps of marking two frequency converter units to be tested as a first frequency converter unit and a second frequency converter unit, adjusting the frequency of the first frequency converter unit to a fourth frequency value, keeping the first frequency unit to continuously operate at the fourth frequency value for a period of time, waiting for the second frequency converter unit to stop, and switching to an operation state of the first frequency converter unit. By the method, performance indexes of the frequency converter unit, such as acceleration, motor rotation speed and the like, can be measured, and whether the frequency converter unit and the motor rotation speed have compatibility in operation can be determined, so that the normal operation of the system is ensured. In addition, when the rated frequency specifications of the two frequency converter units are different, the technology also provides a convenient calculation formula to obtain a fourth frequency value.
Meanwhile, through the arrangement of the fourth frequency value, the test value adjustment rationality can be effectively improved, the test transition time is shortened to the maximum extent on the premise of ensuring the operation safety of equipment, and the test efficiency is improved. On the other hand, the waiting time and the adjusted frequency value obtained by the formula can be matched when the waiting time setting and the adjusted frequency value are placed in the actual parameter condition of the equipment, so that the rationality of the waiting time setting and the adjusted frequency value setting is improved, and the problem that the safety of the excessive test is poor due to the unreasonable waiting time setting and the adjusted frequency value setting is prevented. Moreover, through the setting of the waiting time, the problems that the waiting time is too long to cause lower testing efficiency and the transition time is too long can be prevented from occurring, and the problems that the waiting time is too short to cause the equipment to debug and run stably and excessively for a short time to cause the potential safety hazard to increase can be prevented from occurring. Meanwhile, the frequency value can be adjusted to effectively prevent the problems that the test efficiency is low, the transition time is too long and the optimal production index of equipment operation cannot be achieved due to the fact that the frequency value is set too low, and meanwhile, the potential safety hazard is increased due to the fact that the frequency value is set too high.
In one embodiment of the present invention, the method for testing the transient process of the strategy of converting one frequency into one power frequency comprises the following steps:
step 1d, extracting a frequency converter unit and a power frequency unit to be tested;
step 2d, adjusting the frequency of the frequency converter unit to a fifth frequency value;
step 3d, keeping the frequency unit to continuously run for a fourth waiting time at the fifth frequency value, and waiting for the power frequency unit to stop; the power frequency unit waiting time is the fourth waiting time; the fourth waiting time is obtained by the following formula:
wherein T is 4 Representing a fourth waiting time; j represents the inertial load of the motor corresponding to the frequency converter unit; a represents the maximum acceleration of the frequency converter unit; Δa represents the corresponding maximum acceleration variation amplitude when acceleration is unstable under the condition of maximum acceleration of the frequency converter unit; t (T) w2 Representing theoretical stable operation time length for adjusting the frequency converter unit to a fifth frequency value;
step 4d, after the power frequency unit is stopped, the frequency of the frequency converter unit is adjusted to be a sixth frequency value, and the frequency converter unit is switched to an operating state in which the frequency converter unit operates;
the value of the fifth frequency value is 90% f, the value range of the sixth frequency value is 75% f-85% f, and f represents the rated frequency of the frequency converter unit.
The working principle and the effect of the technical scheme are as follows: the stability of the test frequency converter unit under specific frequency and running time can be improved, and whether the frequency converter unit can be normally switched into a state of running of the frequency converter unit after the power frequency unit is stopped can be verified. Through the testing method, the performance of the frequency converter unit can be evaluated and verified, and the reliability and stability of the frequency converter unit can be improved in practical application.
Meanwhile, through the arrangement of the fifth frequency value, the test value adjustment rationality can be effectively improved, the test transition time is shortened to the maximum extent on the premise of ensuring the operation safety of equipment, and the test efficiency is improved. On the other hand, the waiting time and the adjusted frequency value obtained by the formula can be matched when the waiting time setting and the adjusted frequency value are placed in the actual parameter condition of the equipment, so that the rationality of the waiting time setting and the adjusted frequency value setting is improved, and the problem that the safety of the excessive test is poor due to the unreasonable waiting time setting and the adjusted frequency value setting is prevented. Moreover, through the setting of the waiting time, the problems that the waiting time is too long to cause lower testing efficiency and the transition time is too long can be prevented from occurring, and the problems that the waiting time is too short to cause the equipment to debug and run stably and excessively for a short time to cause the potential safety hazard to increase can be prevented from occurring. Meanwhile, the frequency value can be adjusted to effectively prevent the problems that the test efficiency is low, the transition time is too long and the optimal production index of equipment operation cannot be achieved due to the fact that the frequency value is set too low, and meanwhile, the potential safety hazard is increased due to the fact that the frequency value is set too high.
In one embodiment of the present invention, the one frequency conversion strategy, the two frequency conversion strategy and the one frequency conversion one power frequency strategy are as follows:
the one frequency conversion strategy is as follows: when only one frequency converter unit operates, the frequency conversion adjusting range of the frequency converter unit is 75-85% f, and the flow adjusting range of the water pump is 3.3m 3 /s-4.9m 3 /s；
The two frequency conversion strategies are as follows: when two frequency conversion units are simultaneously operated, the frequency conversion adjustment range of the frequency conversion units is 78-100% f, and the water pumpFlow regulating range 6m 3 /s-10m 3 S, two frequency conversion are kept at the same frequency and are adjusted together;
the frequency conversion and power frequency strategy is as follows: when a frequency converter unit and a power frequency unit are operated simultaneously, the frequency conversion adjusting range of the frequency converter unit is 90-100% f, and the flow adjusting range of the water pump is 9.2m 3 /s-10m 3 /s。
The working principle and the effect of the technical scheme are as follows: a frequency conversion strategy: when only one frequency converter unit operates, the frequency conversion adjusting range of the frequency converter unit is 75-85% f, and the flow adjusting range of the water pump is 3.3m 3 /s-4.9m 3 And/s. At this time, the frequency range of the frequency converter unit is smaller, but the flow regulation range is larger, and the stable operation under different loads can be met.
Two frequency conversion strategies: when the two frequency conversion units are operated simultaneously, the frequency conversion adjusting range of the frequency conversion units is 78-100% f, and the flow adjusting range of the water pump is 6m 3 /s-10m 3 And/s. At this time, the two frequency conversion units keep the same frequency, the frequency adjusting range is larger, different load changes can be adapted, and the flow adjusting range is also larger.
Frequency conversion and power frequency strategy: when a frequency converter unit and a power frequency unit are operated simultaneously, the frequency conversion adjusting range of the frequency converter unit is 90-100% f, and the flow adjusting range of the water pump is 9.2m 3 /s-10m 3 And/s. At this time, the frequency range of the frequency converter unit is smaller, but the high-precision adjustment of the flow can be met, and the power frequency unit can provide certain stability and reliability.
Different frequency conversion strategies provided by the embodiment can meet different requirements under different working conditions, so that the running efficiency and stability of the water pump are improved, and the energy consumption and running cost are reduced.
In one embodiment of the invention, the transient process field test method for the hydraulic valve by utilizing the pressure regulation strategy comprises the following steps:
monitoring the pump outlet pressure and the hydraulic control slow closing valve outlet pressure in real time, and obtaining a pump outlet pressure value and a hydraulic control slow closing valve outlet pressure value;
or (b)
And obtaining a pressure difference between the pump outlet pressure value and the hydraulic control slow closing valve outlet pressure value through difference calculation, and opening the hydraulic control slow closing valve when the pressure difference is 0.
The sensor regulation strategy is to replace other pressure collecting means by using a pressure sensor, and the pump outlet pressure and the hydraulic control slow closing valve outlet pressure are collected in real time by using an additionally arranged pressure sensor.
Specifically, as shown in fig. 3, the transient process field test method for the hydraulic valve by using the frequency converter adjustment strategy includes:
step 1, after a frequency converter unit is started, regulating the frequency converter unit to a stage fixed frequency;
step 2, controlling the hydraulic control slow closing valve to automatically open after the variable frequency units are all regulated to the stage fixed frequency;
step 3, after the hydraulic control slow-closing valve is automatically opened, adjusting the operating frequency of the frequency converter unit, and adjusting the operating frequency of the frequency converter unit to the target operating frequency of the frequency converter unit;
the phase fixed frequency is obtained through the following formula;
wherein F is a Representing a phase fixed frequency; f (F) y Indicating the starting critical frequency of the opening of the hydraulic control slow closing valve; f (F) d Representing the target operating frequency of the frequency converter unit; c represents the number of poles of the motor of the frequency converter unit; k (K) a And K b The sub-table shows the flow coefficient and pressure coefficient required by the opening of the hydraulic control slow-closing valve.
The working principle and the effect of the technical scheme are as follows: according to the technical scheme, the on-site test can be quickly performed after the frequency converter unit is started, and the test efficiency is improved. In the test process, the operation frequency of the frequency converter unit is adjusted, so that the waste of energy sources can be reduced, and the effects of energy conservation and emission reduction are achieved. The phase fixed frequency can be obtained through formula calculation, and then the operating frequency of the frequency converter unit is adjusted to the target operating frequency, so that the operating frequency of the frequency converter unit is accurately controlled. Through the calculation of the flow coefficient and the pressure coefficient, the balance of flow and pressure required by opening the hydraulic control slow-closing valve can be realized, and the stability and the accuracy of the testing process are ensured. The technical scheme can improve the testing efficiency, reduce the energy waste, accurately control the operating frequency, realize the balance of flow and pressure, thereby improving the testing accuracy and reliability
The embodiment of the invention provides a transition process field test system of a high-lift pump station, as shown in fig. 4, comprising:
the type extraction module is used for extracting the specific type of the transition test task to be executed currently, wherein the specific type comprises a normal start-up transition process test of a unit, a normal stop transition process test of the unit, a fault stop transition process test of the unit, an accident stop transition process test of the unit and a reverse rotating speed test of the unit;
The quantity extraction module is used for extracting the quantity of the frequency converter units corresponding to the specific type of the transition test task to be executed currently;
the first test module is used for performing transition process field test on the running state and state switching of the frequency conversion units by utilizing a frequency conversion unit debugging strategy according to the number of the frequency conversion units of the high-lift pump station; the frequency conversion unit debugging strategy comprises a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies, a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies and a frequency conversion-power frequency strategy; the first-to-second frequency conversion strategy comprises a frequency conversion to second frequency conversion sub-strategy and a frequency conversion to power frequency to frequency conversion sub-strategy; the two-to-one frequency conversion strategy comprises a two-to-one frequency conversion sub-strategy and a one-to-one frequency conversion sub-strategy.
The second testing module is used for carrying out transition process field testing on the hydraulic valve by utilizing a hydraulic valve adjusting strategy; the hydraulic valve regulation strategy comprises a pressure regulation strategy, a sensor regulation strategy and a frequency converter regulation strategy;
the third test module is used for performing transient process field test on the starting of the frequency converter, specifically, the starting of the frequency converter is combined with the starting condition of the hydraulic control valve, the soft starting mode, the slope starting mode and the whole process starting mode are referred to, and the total starting time of the frequency converter is controlled to be about 10 s.
The working principle and the effect of the technical scheme are as follows: the embodiment provides a transition process field test system of a high-lift pump station, which can determine an optimal operation mode by carrying out field test of a frequency conversion unit debugging strategy aiming at the number of frequency conversion units of the high-lift pump station, so that the operation efficiency of the pump station and the energy-saving and emission-reduction effects are improved. By utilizing the hydraulic valve regulation strategy to carry out the transient process field test, the optimal control parameters can be determined so as to ensure the reliability and stability of the hydraulic valve, thereby improving the stability and safety of the system. By performing the transient process field test aiming at the starting of the frequency converter, whether the starting of the frequency converter is normal or not can be judged, and the potential fault problem can be found and solved in time, so that the reliability and stability of the system are improved, and the maintenance cost is reduced.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. The transition process field test method for the high-lift pump station is characterized by comprising the following steps of:
Extracting a specific type of a transition test task to be executed currently, wherein the specific type comprises a normal start-up transition process test of a unit, a normal stop transition process test of the unit, a fault stop transition process test of the unit, an accident stop transition process test of the unit and a reverse rotating speed test of the unit;
extracting the number of the frequency converter units corresponding to the specific type of the transition test task to be executed currently;
aiming at the number of the frequency conversion units of the high-lift pump station, performing transient process field test on the running state and state switching of the frequency conversion units by utilizing a frequency conversion unit debugging strategy; the frequency conversion unit debugging strategy comprises a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies, a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies and a frequency conversion-power frequency strategy; the first-to-second frequency conversion strategy comprises a frequency conversion to second frequency conversion sub-strategy and a frequency conversion to power frequency to frequency conversion sub-strategy; the two-to-one frequency conversion strategy comprises a two-to-one frequency conversion sub-strategy and a one-to-one frequency conversion sub-strategy.
Performing transient process field test on the hydraulic valve by utilizing a hydraulic valve adjusting strategy; the hydraulic valve regulation strategy comprises a pressure regulation strategy, a sensor regulation strategy and a frequency converter regulation strategy;
And performing transition process field test aiming at the starting of the frequency converter.
2. The method for in-situ testing of transitional processes of high-lift pump stations according to claim 1, wherein for the number of frequency converter units of the high-lift pump stations, the in-situ testing of transitional processes of the frequency converter units is performed by utilizing a frequency converter unit debugging strategy, comprising:
scanning a frequency converter unit to be tested to obtain the number of the frequency converter units to be tested and the number of power frequency power supplies in the frequency converter unit;
and selecting a frequency converter unit debugging strategy according to the number of the frequency converter units to be tested and the number of the power frequency power supplies in the frequency converter units to carry out transient process field test on the frequency converter units.
3. The method for testing the transitional process on site of the high-lift pump station according to claim 1, wherein the transitional process on site testing method of the one-frequency-to-two-frequency-to-frequency sub-strategy comprises the following steps:
extracting the two frequency converter units to be tested, and marking the two frequency converter units as a first frequency converter unit and a second frequency converter unit;
adjusting the frequency of the first frequency converter unit to a first frequency value;
keeping the first frequency converter unit to continuously operate for a first waiting time at the first frequency value, and waiting for the second frequency converter unit to start; the waiting time of the second frequency converter unit is the first waiting time; the first waiting time is obtained by the following formula:
Wherein T is 1 Representing a first waiting time; f (f) 1 And f 2 Representing rated frequencies corresponding to the first frequency converter unit and the second frequency converter unit; j (J) 1 And J 2 Respectively representing motor inertial loads corresponding to the first frequency converter unit and the second frequency converter unit; a, a 1 And a 2 Respectively representing the maximum acceleration of the first frequency converter unit and the second frequency converter unit; t (T) 01 The method comprises the steps of representing the duration of time for reaching a first frequency value after a first frequency converter unit is started; t is t 1 And t 2 The starting experience time of the first frequency converter unit and the second frequency converter unit is respectively represented; n is n 1 And n 2 Respectively representing the target motor rotation speeds after the first frequency converter unit and the second frequency converter unit are started; p is p 1 And p 2 Representing the pole pair numbers of the motors of the first frequency converter unit and the second frequency converter unit; sqrt () represents a square root operation;
starting the second frequency converter unit when the first waiting time is over, and directly adjusting the frequency value of the second frequency converter unit to the first frequency value;
when the operating frequency of the second frequency converter unit reaches the first frequency value, the two frequency converter units are adjusted to an operating state that the two frequency converters are rated at the same time;
when the rated frequency specifications of the two frequency converter units are the same, the first frequency value is 80% f, and f represents the rated frequency of the frequency converter unit; when the rated frequency specifications of the two frequency converter units are different, acquiring the first frequency value by using a first frequency setting model, wherein the first frequency setting model is as follows:
Wherein F is 1 Representing a first frequency value obtained by a first frequency setting model; f (F) 01 And representing the value of the first frequency value corresponding to the same rated frequency specification of the two frequency converter units.
4. The method for testing the transitional process on site of the high-lift pump station according to claim 1, wherein the transitional process on site testing method of the one-frequency-to-one-power-frequency-to-one-frequency sub-strategy comprises the following steps:
extracting a frequency converter unit and a power frequency unit to be tested;
adjusting the frequency of the frequency converter unit to a second frequency value;
keeping the variable frequency unit to continuously operate for a second waiting time at the second frequency value, and waiting for the power frequency unit to start; the power frequency unit waiting time is the second waiting time; the second waiting time is obtained by the following formula:
wherein T is 2 Representing a second waiting time; j represents the inertial load of the motor corresponding to the frequency converter unit; a represents the maximum acceleration of the frequency converter unit; Δa represents the corresponding maximum acceleration variation amplitude when acceleration is unstable under the condition of maximum acceleration of the frequency converter unit; t (T) w1 Representing theoretical stable operation time length for adjusting the frequency converter unit to a second frequency value;
Starting the power frequency unit when the second waiting time is over, and directly adjusting the frequency value of the frequency converter unit to the third frequency value;
the second frequency value is 85% f, the value range of the third frequency value is 90% f-100% f, and f represents the rated frequency of the frequency converter unit.
5. The method for testing the transitional process on site of the high-lift pump station according to claim 1, wherein the transitional process on site testing method of the two-to-one sub-strategy comprises the following steps:
extracting the two frequency converter units to be tested, and marking the two frequency converter units as a first frequency converter unit and a second frequency converter unit;
adjusting the frequency of the first frequency converter unit to a fourth frequency value;
keeping the first frequency converter unit to continuously operate for a third waiting time at the fourth frequency value, and waiting for the second frequency converter unit to stop; the waiting time of the second frequency converter unit is the third waiting time; the third waiting time is obtained by the following formula:
wherein T is 1 Representing a first waiting time; f (f) 1 And f 2 Representing rated frequencies corresponding to the first frequency converter unit and the second frequency converter unit; j (J) 1 And J 2 Respectively representing motor inertial loads corresponding to the first frequency converter unit and the second frequency converter unit; a, a 1 And a 2 Respectively representing the maximum acceleration of the first frequency converter unit and the second frequency converter unit; t (T) 02 Indicating the duration of time for reaching the fourth frequency value after the first frequency converter set is started; t (T) a2 Indicating the acceleration time length when the first frequency converter set reaches a fourth frequency value after being started; t is t 1 And t 2 The starting experience time of the first frequency converter unit and the second frequency converter unit is respectively represented; n is n 1 And n 2 Respectively representing the target motor rotation speeds after the first frequency converter unit and the second frequency converter unit are started; p is p 1 And p 2 Representing a first frequency converter unitThe pole pair number of the motor of the second frequency converter unit; sqrt () represents a square root operation;
when the second frequency converter unit is stopped, switching to an operating state of the frequency converter unit;
when the rated frequency specifications of the two frequency converter units are the same, the fourth frequency value is 80% f, and f represents the rated frequency of the frequency converter unit; when the rated frequency specifications of the two frequency converter units are different, a fourth frequency setting model is utilized to obtain a fourth frequency value, and the fourth frequency setting model is as follows:
Wherein F is 4 Representing a fourth frequency value obtained by a fourth frequency setting model; f (F) 04 Representing the value of the fourth frequency value corresponding to the same rated frequency specification of the two frequency converter units; t (T) 04 Indicating the duration of time for reaching the fourth frequency value after the first frequency converter set is started; t (T) t1 And the time length for stopping the second frequency converter unit is represented.
6. The method for testing the transitional process on site of the high-lift pump station according to claim 1, wherein the transitional process on site testing method for changing one frequency into one frequency sub-strategy comprises the following steps:
extracting a frequency converter unit and a power frequency unit to be tested;
adjusting the frequency of the frequency converter unit to a fifth frequency value;
keeping the frequency unit to continuously run for a fourth waiting time at the fifth frequency value, and waiting for the power frequency unit to stop; the power frequency unit waiting time is the fourth waiting time; the fourth waiting time is obtained by the following formula:
wherein T is 4 Representing a fourth waiting time; j represents the inertial load of the motor corresponding to the frequency converter unit; a represents the maximum acceleration of the frequency converter unit; Δa represents the corresponding maximum acceleration variation amplitude when acceleration is unstable under the condition of maximum acceleration of the frequency converter unit; t (T) w2 Representing theoretical stable operation time length for adjusting the frequency converter unit to a fifth frequency value;
when the power frequency unit is stopped, the frequency of the frequency converter unit is adjusted to be a sixth frequency value, and the frequency is switched to an operating state of the frequency converter unit;
the value of the fifth frequency value is 90% f, the value range of the sixth frequency value is 75% f-85% f, and f represents the rated frequency of the frequency converter unit.
7. The method for testing the transitional process on site of the high-lift pump station according to claim 1, wherein the one-frequency conversion strategy, the two-frequency conversion strategy and the one-frequency conversion one-frequency strategy are as follows:
the one frequency conversion strategy is as follows: when only one frequency converter unit operates, the frequency conversion adjusting range of the frequency converter unit is 75-85% f, and the flow adjusting range of the water pump is 3.3m 3 /s-4.9m 3 /s；
The two frequency conversion strategies are as follows: when two frequency conversion units run simultaneously, the frequency conversion adjusting range of the frequency conversion units is 78-100% f, and the flow adjusting range of the water pump is 6m 3 /s-10m 3 S, two frequency conversion are kept at the same frequency and are adjusted together;
the frequency conversion and power frequency strategy is as follows: when a frequency converter unit and a power frequency unit are operated simultaneously, the frequency conversion adjusting range of the frequency converter unit is 90-100% f, and the flow adjusting range of the water pump is 9.2m 3 /s-10m 3 /s。
8. The high lift pump station transition field test method of claim 1, wherein the transition field test method for a hydraulic valve using the pressure regulation strategy comprises:
monitoring the pump outlet pressure and the hydraulic control slow closing valve outlet pressure in real time, and obtaining a pump outlet pressure value and a hydraulic control slow closing valve outlet pressure value;
and obtaining a pressure difference between the pump outlet pressure value and the hydraulic control slow closing valve outlet pressure value through difference calculation, and opening the hydraulic control slow closing valve when the pressure difference is 0.
9. The method of on-site testing of a high lift pump station transient process according to claim 1, wherein the method of on-site testing of a hydraulic valve transient process using the frequency converter adjustment strategy comprises:
after the frequency converter unit is started, the frequency converter unit is regulated to a stage fixed frequency;
when the frequency converter sets are all regulated to a stage fixed frequency, the hydraulic control slow closing valve is controlled to be opened automatically;
after the hydraulic control slow-closing valve is automatically opened, the operating frequency of the frequency converter unit is adjusted, and the operating frequency of the frequency converter unit is adjusted to the target operating frequency of the frequency converter unit;
the phase fixed frequency is obtained through the following formula;
Wherein F is a Representing a phase fixed frequency; f (F) y Indicating the starting critical frequency of the opening of the hydraulic control slow closing valve; f (F) d Representing the target operating frequency of the frequency converter unit; c represents the number of poles of the motor of the frequency converter unit; k (K) a And K b The sub-table shows the flow coefficient and pressure coefficient required by the opening of the hydraulic control slow-closing valve.
10. A transitional process field test system of a high-lift pump station, characterized in that the transitional process field test system comprises:
the type extraction module is used for extracting the specific type of the transition test task to be executed currently, wherein the specific type comprises a normal start-up transition process test of a unit, a normal stop transition process test of the unit, a fault stop transition process test of the unit, an accident stop transition process test of the unit and a reverse rotating speed test of the unit;
the quantity extraction module is used for extracting the quantity of the frequency converter units corresponding to the specific type of the transition test task to be executed currently;
the first test module is used for performing transition process field test on the running state and state switching of the frequency conversion units by utilizing a frequency conversion unit debugging strategy according to the number of the frequency conversion units of the high-lift pump station; the frequency conversion unit debugging strategy comprises a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies, a frequency conversion strategy of one frequency conversion, a frequency conversion strategy of two frequencies and a frequency conversion-power frequency strategy; the first-to-second frequency conversion strategy comprises a frequency conversion to second frequency conversion sub-strategy and a frequency conversion to power frequency to frequency conversion sub-strategy; the two-to-one frequency conversion strategy comprises a two-to-one frequency conversion sub-strategy and a one-to-one frequency conversion sub-strategy.
The second testing module is used for carrying out transition process field testing on the hydraulic valve by utilizing a hydraulic valve adjusting strategy; the hydraulic valve regulation strategy comprises a pressure regulation strategy, a sensor regulation strategy and a frequency converter regulation strategy;
and the third testing module is used for performing transition process field test aiming at the starting of the frequency converter.
CN202310664768.8A 2023-06-06 2023-06-06 Transition process field test method and system for high-lift pump station Active CN116624375B (en)

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CN105673474A (en) * 2016-03-31 2016-06-15 深圳市新环能科技有限公司 Water pump efficiency, flow and lift detection method and system
CN107013473A (en) * 2017-04-19 2017-08-04 武汉惜源科技有限公司 A kind of pumping plant real time on-line monitoring and energy efficiency managing method and system
CN107437125A (en) * 2017-08-02 2017-12-05 云南省水利水电勘测设计研究院 A kind of pumping plant Complex hydraulic system variable-speed operation hydraulic parameters optimization method
CN211288059U (en) * 2019-10-23 2020-08-18 北京长城华瑞科技有限公司 Pump package on-line monitoring system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2165528C1 (en) * 2000-02-16 2001-04-20 Тульский государственный университет Powered support pumping plant
CN105673474A (en) * 2016-03-31 2016-06-15 深圳市新环能科技有限公司 Water pump efficiency, flow and lift detection method and system
CN107013473A (en) * 2017-04-19 2017-08-04 武汉惜源科技有限公司 A kind of pumping plant real time on-line monitoring and energy efficiency managing method and system
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