KR101250271B1 - Booster pump control system and method for controlling pump using the same - Google Patents

Abstract

PURPOSE: A booster pump control system and a pump control method using the same are provided to perform a bidirectional control by a used amount of water, a supplied amount of the water, flux signals, the operation of a motor, and a position analysis of a flux efficiency point. CONSTITUTION: A pump control method using a booster pump control system comprises; a step(S200) for searching initial values of an inspection condition and a control condition of the booster pump control system; a step(S210) for determining whether or not a current value of the control condition is lower than a target value; a step(S220) for outputting base data values of the initial operation of a pump for an inverter, the operation of an electromagnetic contactor for operating the inverter, the operation of an inverter outputting unit; a step(S230) for measuring the data of the power operation of the inverter, a flux value, and a pressure value and recording to each control loop recording blocks of a condition inspection control loop recording device; and a step(S250) for immediately coinciding the flux of a pump unit by designation-outputting power output in batches; a step(S260) for determining that the used amount of water is in a range of 1-100% or 101-200% or 201-600% by re-inspecting a condition value detected in a real time basis and the data recorded in the control loop recording blocks; a step(S270) for precisely controlling the pump unit by controlling a direct operation outputting unit and the inverter outputting unit depending on a flux determination result; and a step(S280) for compare-determining whether the pressure values and values of the used amount of the water before and after operating inverter power or additional power. [Reference numerals] (AA,JJ) No; (BB,II) Yes; (C1) Current flux data; (C2) Set pressure data; (C3) Current pressure data; (C4) Power operation rate data; (D1) Flux 0%; (D2) Flux 1%; (D3) Flux 100%; (D4) Flux 101%; (D5) Flux 200%; (D6) Flux 201%; (E1) Control loop first block; (E2) Control loop second block; (E3) Control loop third block; (E4) Control loop fourth block; (E5) Control loop fifth block; (E6) Control loop sixth block; (F1) Used flux 1-100%; (F2) Used flux 101-200%; (F3) Used flux 201-600%; (G1,G2) Increasing; (H1,H2) Decreasing; (S200) Step for inspecting a booster pump control system and searching for a control condition; (S210) Current value of the control condition is smaller than a target value?; (S220) Initial driving of an inverter pump, Driving an electromagnetic contactor for driving the power of an inverter, Outputting a basic data value of an inverter output unit; (S230) Recording three-element data, which consists of the power operation rate, flux, and pressure of the inverter, in each control loop according to a flux change of each pump capacity range after searching for a condition inspection control loop recording device; (S240) Reading out a power output rate by inspecting data recorded in the control loop first and second blocks and the current status value detected in real time; (S250) Designating and outputting the read power output rate in batches; (S270) Outputting a pump unit control signal to a live starting output unit and the inverter output unit according to the flux determination result; (S280) Whether a pressure value and a consumed flux are the same before and after driving the inverter power or additional power; (S290) Controlling a PI sub control unit to obtain uniform flux and pressure temporarily; (S300) Maintaining the constant pressure and flux by a PI operation control unit;

Description

Booster pump control system and method for controlling pump using the same

The present invention relates to a booster pump, and more particularly, to a control system of a booster pump and a method for controlling a pump using the same, which can reduce power costs and increase the stability of a facility.

The booster pump control system separates large-capacity pumps into small-capacity pumps and increases the number of pumps from small flow rate to large flow rate to control the speed to control power from fine pressure to high pressure to reduce power costs and increase the safety of equipment. do.

Such booster pump control systems are widely used in areas such as apartment complexes, buildings, residential buildings, bathrooms and factories.

For example, in the conventional case, a water tank is installed on a rooftop, and the water is stored in the water tank before use. However, when the water tank is installed on the rooftop due to the high rise of the building, a lot of load is applied to the building and the appearance is not beautiful.

In order to improve this, the water tank and the pump are installed in the basement to pressurize upwards. In this case, the booster pump system is used. ID It uses the proportional constant calculus program to keep the current pressure constant and equal to the set pressure.

An inverter is used to control an electric motor, and the inverter can change a three-phase frequency in a voltage / frequency (V / F) control scheme to change 0 to 100% of an output.

In the conventional system, six pumps with 100% performance are divided in a system piping line for each plant requiring 600% flow rate, increasing the pump quantity from 1% to 600% of the flow rate and maintaining a constant pressure. The pressure of the pump was accelerated and decelerated to control the pressure. In this process, the control depends on only one pressure sensor signal. As a result, when the pump crosses from one pump to the other pump, there is a problem that an abnormal operation is caused due to the instantaneous excessive input flow change.

Such a conventional booster pump system has a high pressure abnormality, an impact pressure abnormality, a section pressure deviation abnormality, a pipe damage abnormality, an inverter burnout abnormality, a frequent start stop of the pump, and an abnormality in which the pump that needs to be stopped does not stop continuously. Direct start-up pumps start and stop on and off continuously, and problems such as pipe shake due to water heater impact are also caused.

The present invention is proposed to solve the problems according to the prior art, a booster pump capable of bi-directional control through the analysis of the position of the use flow rate and supply flow rate, pressure signal and flow rate signal and motor operation amount and flow efficiency point Its purpose is to provide a control system and a pump control method using the same.

In addition, another object of the present invention to provide a booster pump control system and a pump control method using the same to reduce the power energy lost in the abnormal operation of the pump and to increase the safety of the equipment.

The control system of the booster pump of the present invention for achieving the above object and the reservoir; A reservoir level sensor for sensing the level of the reservoir; A pump unit comprising a plurality of pumps; A pressure sensing unit connected to one end of the pump unit to sense a discharge pressure of the pump unit; A flow rate sensing unit connected to one end of the pump unit to sense a discharge flow rate of the pump unit; An input unit configured to receive and drive signals from the reservoir level sensor and the pressure sensing unit, the flow sensing unit, and the inverter output unit; An environmental inspection control loop storage device configured to receive an output signal of the input unit and store a flow rate value, a pressure value, and a power operation amount according to a flow rate change of a booster pump; A feedback sub-controller configured to receive an output signal of the environmental test control loop storage device and to start or stop an additional pump for the first time among the pump units; A discrimination integrated control unit which receives a signal from the environmental inspection control loop storage device and the eye sub control unit and outputs a signal for controlling the pump unit; A peer operation control unit for exchanging data with the determination comprehensive control unit and receiving a control signal from the peer sub control unit and performing control by a proportional constant and an integral operation; And an output unit configured to control the operation of the inverter output unit and the direct start output unit by receiving an output signal according to a flow rate value, a pressure value, and a power operation amount according to the flow rate change of the pump of the determination comprehensive control unit.

According to the present invention, the quantitative control to make the use flow rate and the supply flow rate immediately equal to each other, and the bidirectional control through the position analysis of the pressure signal and the flow signal and the flow efficiency point of the power operation amount to reduce the power energy lost due to the abnormal operation of the pump And the effect of improving the safety of the facility.

1 is a block diagram showing the configuration of a booster pump control system according to an embodiment of the present invention.
2 is a flowchart illustrating a pump control method using a booster pump control system according to an exemplary embodiment of the present invention.
3 is a graph in which the control target value is determined according to the flow rate, pressure, and power operation amount.
4A and 4B are diagrams illustrating a control value and a time-dependent value of the proportional constant kp by the proportional operation in the eye calculation controller.
5A and 5B are diagrams showing an integral control value and an integral operation (ki) graph in the eye calculation control unit.

Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the technical idea of the present invention. .

First, a description will be given of the booster pump control system according to an embodiment of the present invention.

Booster pump control system according to an embodiment of the present invention, as shown in Figure 1, the reservoir 10, the reservoir level sensor unit 20, the pump unit 30, the pressure sensing unit 40, the flow rate sensing Unit 50, inverter output unit 60, direct start output unit 61, input unit 70, environmental inspection control loop storage storage device 80, P sub control unit 90, determination total control unit 100 ), The eye calculation control unit 110 and the output unit 120.

Referring to each component of the booster pump control system of the present invention having the above configuration, the reservoir 10, the reservoir level sensor unit 20 for detecting the water level of the reservoir 10, and a plurality of pumps The pump unit 30 is configured, a pressure sensing unit 40 connected to one end of the pump unit 30 to sense the discharge pressure of the pump unit 30, and one end of the pump unit 30 is connected to the pump Signals from the flow rate sensing unit 50 for sensing the discharge flow rate of the unit 30, the reservoir level sensor 20, the pressure sensing unit 40, the flow rate sensing unit 50 and the inverter output unit 60 An environmental inspection control loop storage device for receiving an input unit 70 for driving an input and an output signal from the input unit 70 to inspect an environment of a booster pump, and to store a flow rate, a pressure, and a power operation amount in a control loop storage block. 80 and the pump unit 30 receiving the output signal from the environmental inspection control loop storage device 80. The pump unit 30 receives a signal from the eye sub-control unit 90 for starting the pump for the first time or starts or stops the additional pump, and the environment test control loop storage device 80 and the eye sub-control unit 90. A discrimination comprehensive control unit 100 for outputting a signal for controlling the data, and mutual data exchange with the discrimination comprehensive control unit 100 to exchange data with the discrimination comprehensive control unit 100, and the eye sub-control unit 90 ), And the inverter output unit 60 and the pump unit 30 receiving the output signal from the eye calculation control unit 110 for controlling the proportional constant and the integral operation, and the output signal of the determination integrated control unit 100. An output unit 120 for controlling the pumping operation of, The output unit 120 is composed of a direct start output unit 61 for driving the pump of the pump unit 30.

In the booster pump control system configured as described above, the reservoir 10 is a device for storing water, and the reservoir level sensor unit 20 detects the water level of the reservoir 10 and delivers it to the input unit 70. It is.

In addition, a plurality of pumps P1, P2, P3, P4, P5,..., PN are disposed in the pump unit 30, and valves are connected to each pump, and the valves are opened when the pump is driven. It is.

The plurality of pumps are provided with first and second switch units 31 and 32 that are opened and closed under the control of the output signal of the inverter output unit 60.

In this case, a plurality of switches SW1_1, SW1_2, SW1_3, SW1_4, SW1_5, SW1_N are connected to each pump in a one-to-one correspondence to the first switch unit 31.

A plurality of switches SW2_1, SW2_2, SW2_3, SW2_4, SW2_5, and SW2_N are connected to the second switch unit 32 in a one-to-one correspondence.

In addition, the pressure sensing unit 40 is connected to one end of the pump unit 30 to sense the pressure discharged from the pump unit 30 to transmit to the input unit 70, the flow rate sensing unit 50 It is connected to one end of the pump unit 30 serves to sense the flow rate discharged from the pump unit 30 to transmit to the input unit 70.

In addition, the input unit 70 receives a signal from the water level sensor 20, the pressure sensing unit 40, the flow sensing unit 50, and the inverter output unit 60, and the environmental inspection control loop storage device 80. As described above, water level detection data detecting the water level of the reservoir, data about the pressure and flow rate sensed by the pump unit 30, and the operation amount of the inverter output unit 60 are input. .

The environmental inspection control loop storage memory 80 stores the overall state of the previous pump driving, that is, data necessary for controlling the pump driving.

In addition, the inverter output unit 60 functions to control the pump operation flow rate by selecting a pump by controlling the switches configured in each pump of the pump unit 30, and the direct start output unit 61 It functions to collectively drive the pump of the pump part 30 according to the use flow volume.

In addition, the eye sub control unit 90 is used when starting the stopped pump for the first time or starting two additional pumps in one pump or stopping the additional pumps in two, and the environmental inspection control loop storage device 80 ) The output of the inverter power operation amount determined in () is collectively output (e.g. 60%), the power operation amount is held for 2 seconds, and then the limiting pressure and the current pressure are compared from the operating amount 60%, starting from the section where the pressure matches. The operation of connecting to the operation control unit 110 is performed.

In addition, the P operation control unit 110 converts the control signal transmitted from the P sub control unit 90 to the proportional constant Kp (Kp = MV = Kp.E) and the integral operation Ki = MV = Kp × S / Ki. It controls by XEn and outputs to the determination comprehensive control part 100. FIG.

In addition, the determination control unit 100 compares the current value and the environmental test stored value stored in the environmental inspection control loop storage device 80 and outputs a control value corresponding to each section, and outputs the output control value to the eye calculation control unit. 110 and outputs to the output unit 120.

Next, a pump control method using the booster pump control system having the above configuration will be described.

First, the booster pump control system of the present invention is to perform bidirectional control through quantitative control such that the use flow rate and the supply flow rate are the same in real time, and the position analysis of the operating amount flow rate supply efficiency efficiency point of the pressure signal and the flow signal motor.

The booster pump control system of the present invention for such a drive, the seven control of the operating pressure, the limiting pressure, the flow rate, the power consumption, the flow rate effective control loop, the proportional constant, the sub-turn output control value circulation piping line return pressure deviation value It is a system that requires conditions.

Of the seven control conditions, the working pressure is a pressure value sensed by the current pressure sensing unit.

The limiting pressure is a target pressure value, and the use flow rate is the amount of water flowing through the pipe when water is used.

And, the power usage means the power controlled by the inverter when the pump rotates by the motor to flow water in the pipe. For example, the indirect start output unit 61 adjusts the flow rate change amount by 100%, and the inverter adjusts the range from 0 to 100% while the inverter is 1,2,3%,... It is to control the amount of change when variable acceleration at 99% fine speed.

In addition, the flow rate effective control loop is shown in FIG. 3 to find a position where the pressure, the flow rate, and the power operation amount meet and become the flow rate zero.

More specifically, the graph of FIG. 3 shows a method of finding the flow effective loop, and if the power is operated so that the control target value and the present pressure match, and the power amount is 60% in the absence of the flow rate, it is the flow effective loop zero point. . In this case, if 1% of the flow rate is used, it should be operated more than 60%. In this case, the direct start output unit 61 may not perform a function, and only the inverter output unit 60 capable of controlling the pump speed may perform the function. In FIG. 3, the point where the control target value, the pressure, the flow rate, and the power operation amount meet is a position indicating the flow rate '0 point'.

In addition, the proportional constant is a PID proportional constant, which is necessary to control the present pressure to meet the target pressure limit value. For example, if the present value is higher and centered on the pressure target value 5.0, the inverter speed is lowered to decrease the pressure. If the current pressure value drops below the target limit pressure, increase the power and reduce the amount of power. Then, raise and lower the power slightly so that the point fits in the center. The program is official.

Since the subroutine output control value (sub-PID) cannot be controlled by proportional constant control, it is a control used to increase the pump from one to two.

The seven essential control conditions required for these booster pump control systems operate in one control cycle, and the system control environment is based on 0%, 99%, 100%, 101%, 199%, and 200% power operation of the flow rate. The system should automatically set up by reading the measurement AI.

The pump control method using the booster pump control system of the present invention as shown in Figs. 2 and 3, the first step (S200) of checking the booster pump control system and the initial values of the control environment, the In the second step (S210) of determining whether the present value of the control environment is smaller than the target value, and as a result of the comparison, if the present value of the control environment is smaller than the target value, initial operation of the inverter pump and operation of the inverter contactor driving magnetic contactor are performed. In the third step (S220) of outputting the basic data value of the inverter output unit 60 to the pump unit, the three-element data of the inverter power operation amount, the flow rate value, and the pressure value are measured according to the change in the flow rate for each pump capacity section. The fourth step (S230) of storing each of the control loop storage blocks of the environmental inspection control loop storage device 80 (S230), the measurement is read in the section for each flow rate and the data stored in the control loop 1,2 blocks and detected in real time The fifth step (S240) of inspecting the sulfur value to read the power output amount, the sixth step (S250) of immediately matching the flow rate of the pump unit by outputting the designated power output value collectively, the control loop blocks by measuring and reading in the section for each flow rate A seventh step (S260) of re-reviewing the data stored in the current value and the situation value detected in real time according to the increase or decrease of the flow rate in the range of 1 to 100%, 101 to 200%, and 201 to 600%; The eighth step (S270) of precisely controlling the pump unit 30 by controlling the direct start output unit 61 and the inverter output unit 60 according to the flow rate determination result, before and after the inverter power or additional power operation In the ninth step of comparing and determining whether the pressure value and the required flow rate value match (S280), if the pressure value and the flow rate value do not match, the P sub control unit 90 controls the flow rate and the pressure to be the same temporarily. After that, the tenth step to return to the ninth step (S290), it consists of a pressure value and when the flow rate matches that determine blood child operation by control by the control unit 110 maintain a predetermined pressure and flow rate, and the second stage 11 back to the ninth step (S300).

More specifically with respect to the above-described driving steps of the booster pump control system, first, in the first step (S200) of checking the booster pump control system and searching for the control environment, the environmental inspection control loop is stored through the input unit 70. The initial value of the supply water level sensor of the reservoir water level sensor unit 20 stored in the device 80, the initial value of the pressure sensing unit 40, and the initial value of the flow rate sensing unit 50 are retrieved, and the inverter output unit A signal of 60, a breaker (not shown) power voltage signal of the booster pump control system, and an operation of checking whether or not the system is abnormal are performed.

In addition, the second step (S210) is to compare the target value of the control environment and the currently input control value in the determination comprehensive control unit 100, and this operation is to analyze the current state of the system in the step-by-step flow rate application section. .

For example, when the target pressure value is 5.0, the control range is 0.5, and the current value is 4.4, the comparison test result value is 0.6, and the control condition is 0.1.

In addition, in step S220, the inverter output unit 60 drives power of the inverter output unit 60 and operates a pump according to a corresponding flow rate change for each section as part of performing the control in step 2. At this time, the determination integrated control unit 100 operates the digital signal inverter control magnetic contactor of the output unit 120 to supply the inverter DC input analog DC 0V to 10V signal as a basic output value to start the pump. At this time, the basic output value is initially set at 50% as the operation initial value. However, since the effective flow rate varies from site to site according to the performance of the various equipments, it is possible to change the basic output value to the value measured during inspection during operation.

In other words, if the present value of the control environment is smaller than the target value, the inverter power relay is activated, the inverter start relay is activated, and the inverter output amount outputs 5.0 V DC and 12 mA DC corresponding to 50% of the initial control signal. It supplies to a pump part through the part 60.

In the fourth step S230, the environmental inspection control loop storage device 80 is searched, and in the state where the set pressure data is set, the pressure present value of the pressure sensing unit 40 according to the flow rate change for each pump capacity section. Control loop storage block in the environmental inspection control loop storage device 80 by measuring data, flow rate current value data of the flow rate sensing unit 50 and inverter power operation amount data for each section of the supplied flow rate of the inverter output unit 60. (Hereinafter, divided into six storage blocks will be described.)

More specifically, the control loop first block stores three-component data of the flow rate value, the pressure value, and the power operation amount when the flow rate change is 0% at the time of measurement, and the flow rate change is 1% in the control loop second block. 3 element data is stored in the control loop, and the 3 element data when the flow rate change is 100% is stored in the control loop third block, and the 3 element data when the flow rate change is 101% is stored in the control loop fourth block. The third element data when the flow rate change is 200% is stored in the control loop fifth block, and the three element data when the flow rate change is 201% is stored in the control loop fifth block. As described above, in the fourth step, the central control of the entire system is performed based on data obtained by comparing the environment of the flow rate for each pump quantity in a one-to-one manner.

The storage time is executed in the control diagram in a section in which the flow rate for each block section and the current flow rate coincide.

In other words, 60% of the capacity is the capacity of the ash. For example, when the limit pressure is 5.0, and the inverter is started, when the current pressure reaches 5.0, the amount of power is 60% and the flow rate is 0.0% without using water at all. When 1% water is used, the current pressure decreases, and the speed is increased by increasing the power amount to send 1% more water.

In the control loop first block having a flow rate of 0%, a pressure: pressure initial value 5.0BAR, a flow rate: present value 0.0%, and a power operation amount: 60% are stored. In the second control loop having a flow rate of 1%, the pressure: present value 5.0BAR, the flow rate: present value 1.0%, and the power operation amount 60.04% are stored. In the control loop third block having a flow rate of 100%, the pressure: present value 5.0BAR, the flow rate: present value 100%, and the power operation amount: 100% are stored. In the control loop fourth block having a flow rate of 101%, pressure: present value 5.0BAR, flow rate: present value 101%, and power operation amount 160.04% are stored. In the control loop fifth block having a flow rate of 200%, pressure: present value 5.0 BAR, flow rate: present value 200%, and power operation amount: 200% are stored. In the control loop sixth block having a flow rate of 201%, a pressure: present value 5.0BAR, a flow rate: present value 201%, and a power operation amount 260.04% are stored.

After the search of the environmental inspection control loop storage device is completed, the system interlocks in continuous operation, repeating the pressure reduction and pressure increase with increasing flow rate and decreasing flow rate.

Control loop When operating within the block range without increasing the flow rate for each block, use the control loop function only up to the previously memorized section, and repeat the operation after remembering the maximum flow rate of pump use.

Next, the fifth step (S240) is to proceed in the determination integrated control unit 100, the read data may be different for each performance value of the pump and the method is the same. Effective flow power configuration determined if%, pressure 5.0 BAR, inverter running 60%, flow rate 1%, pressure 5.0 BAR, inverter running 60.04%, flow rate 100%, pressure 5.0 BAR, inverter running 100% Is 100% -60% = 40%, so the power control adjustment range is 40%. The effective flow per 1% of the control adjustment is 100 divided by 40 = 2.5%. When 10% of the flow rate changes, 10% ÷ 2.5% = 4. Thus, the power output reading is 60% + 4% = 64%.

In the sixth step S250, the read power output is operated. The 64% power output amount is 64% of the flow rate by simultaneously outputting 64% instead of controlling the inverter speed step by step in a control in which the flow rate is consumed by 10%. Matches% immediately. For example, the data of the determination comprehensive control unit 100 simultaneously outputs 6.4V, which is 64% of the inverter analog input DC 10V signal, and relays the drive so that the inverter output unit 60 is turned on.

Next, the seventh step (S260) is the control loop third, fourth, fifth, sixth block, that is, the consumption flow rate is in the range of 1 ~ 100%, 101 ~ 200% and 201 ~ 600% It is the step of mutual discrimination.

In the eighth step S270, the pump unit 30 is precisely controlled by controlling the direct start output unit 61 and the inverter output unit 60 according to the flow rate determination result described above. When driving the six to six, even if the discharge flow rate decreases or increases, it is a step that can be precisely adjusted to the flow rate again in the inverter output unit (60).

For example, if the flow rate increases from 100% to 101% and the power operating amount increases, the range in which one pump operated at 100% can be supplied at a discharge flow rate of 1% (control loop 3 block stored record value data Point), the speed of the inverter output unit 60 is drastically reduced, and at the same time, the second pump is operated to maintain the constant pressure by making the consumption flow rate and the supply flow rate the same. That is, 60% of the target holding pressure of the control loop first block at the flow rate of 0% and 1% of the inverter operating amount of the control loop at the flow rate of 1% and at the control loop of the control loop at the flow rate of 100% at the flow rate of 100%. 160.04% of the total amount of power operation of the three blocks of inverter is transferred to the output unit 120 from the determination control unit 100, and the flow rate 1% is supplied to the inverter output unit 60, and the direct output unit is output. Furnace 61 is supplied with 100% flow rate through a second additional motor. The amount of supply and the amount of supply are coincided in a short time, and then the flow rate is consumed and the control is controlled from the position where the flow rate is consumed.

As another example, when the use flow rate is 201%, 260.04% is output to the output unit 120 through the determination comprehensive control unit 100.

 For example, in this case, the inverter operation ON relay is maintained and the inverter input signal analog input 100% (DC 10V, DC 20mA) is inputted with the input signal 60.04% (DC 6.04V and DC 9.66mA). Supplies). After that, the additional motor relay is activated, and then the third additional motor is relayed.

When it is determined that the use flow rate is increased to 201 to 600%, the pump is further operated by adjusting the flow rate control inverter output unit 60 and the flow rate fixed direct start output unit 61.

On the other hand, when the flow rate and power operation amount decrease, for example, one pump and an additional pump that were operating at 200 to 600% decrease the discharge flow rate, and the power operation amount decreases from 200% to 199% or 99%. If the pressure increases, stop the additional pump.

As another example, the inverter power operation amount 60.04 and the additional motor 100% were operated at 160.04% in the flow rate 101% section of the control loop fourth block, while the flow rate was reduced and the pressure increased and the inverter operation amount was less than 160%. When it becomes 159%, since it is below effective flow volume, it is an operation amount which an inverter cannot supply effective flow volume. Therefore, the 100% additional pump which is in operation is stopped and the flow rate of 100% or less of the flow rate is controlled in the range of 60 to 100% by one inverter output unit 60. In this case, the second additional motor relay is stopped, the inverter operation ON relay is kept running, and 59% (DC 5.9V and DC 9.44mA) is rapidly accelerated by 100% of the inverter input signal analog input (DC 10V and DC 20mA). Maintain 99% of flow rate and perform constant control.

At this time, the reason why the inverter output is suddenly accelerated is because the inverter has to supply the flow rate instead of the stopped pump flow rate, which was used at 100% of the direct start. In case of stopping the additionally used pump, first check the position to the section where the inverter power quantity cannot supply the flow rate, and then prepare for the stop, and the direct pressure pump stops only when the constant pressure is below 100% of the flow rate. It is a completely different control method than the method of stopping depending on only one sensor signal.

Next, as described above, a ninth step S280 is performed in which a comparison between the pressure value before and after the inverter power or additional power operation and the required flow rate value is matched is performed. At this time, the comparison between the pressure value before and after the inverter power operation and the required flow rate value is performed after driving one pump when the flow rate is 1 to 100%, and the pressure value and the required flow rate value before and after the additional power operation is performed. The comparison is made after two or more pumps are run when the flow rate is 101 ~ 200% or 201 ~ 600%.

And, in the tenth step (S290), the operation to control the flow rate and the pressure, as a means for preventing the instantaneous hunting of pressure when the current pressure value is greater than the limit pressure value compared to the measured value for each flow section In the step of switching to the function of limiting the operation amount of the inverter to the flow rate effective point position, if the pressure value and the flow rate value do not match, the flow rate and pressure are temporarily controlled using the eye sub-control unit 90, and then To return to step 9.

When it is determined that the pressure value and the flow rate value match, the eleventh step S300 is controlled by the eye calculation controller 110 to maintain a constant pressure and flow rate, and returns to the ninth step.

For example, in step 10 (S290), the booster pump control system generates a flow rate in the stop state, and thus, one inverter is initially started or one inverter pump is in operation. This mismatch causes the additionally operated pump to stop when the current value exceeds the target value, and then operates the eye sub-control unit 90 to prevent frequent starting stops again because the current pressure becomes lower than the target pressure. to be.

For example, when the additional sub-control unit 90 is added, for example, at the same time as the additional pump is started, the inverter power amount is set to 60% of the 0% flow rate section inverter operating amount stored in the control loop first block. It monitors the deviation whether the current pressure difference is exceeded or is insufficient, and controls the sub-pied according to the deviation range, and if it is normal, it transmits to the continuous pi-control unit.

In the eleventh step, the automatic calculation ID formula in the eye operation control unit 110 is a block determined by an equation tied to one block. When the current pressure changes suddenly, the formula itself excessively pumps to match the limit pressure. Since there is a characteristic of raising and lowering, the pressure is firstly stabilized in the eye sub-control unit 90, and then a response is immediately performed only when the flow rate decreases or increases after the limit pressure and the current pressure match.

Next, the malfunction prevention control output operation will be described. First, a signal is transmitted from the inverter operating amount of 100% to 60% of the control loop first block flow rate 0% of the inverter operating amount based on the 60% value (DC 6V and DC 9.6mA). . Thereafter, the target flow rate and pressure, the current flow rate and pressure deviation are monitored, and when the deviation is normal, it is transmitted to the eye operation control unit 110 to control it. If the deviation is inconsistency, for example, when the control loop is over, the control loop first block data value is extended and delayed, and when the deviation is not reached, the control loop 110 transfers the control loop 110 to the reverse speed calculation operation control unit 110 for control.

PID control is indispensable for real time pressure control in the booster pump control system. PID control is a combination of proportional control, proportional-integral control and proportional-derivative control. It is applied to the HV10 controller. Depending on the situation, the control characteristics of the equipment are slightly different, so if necessary, field adjustment may be required in addition to the factory default settings.

4A and 4B show the control value by the proportional operation and the value according to the time of the proportional constant kp. The deviation between the target value and the present value is shown. The smaller the proportional constant kp, the lower the target value pressure. It can respond quickly and perform precise operation. The downside is that a little dull operation is required because excessive pressure can cause significant pressure swings.

5A and 5B, the integral control value and the integral ki operation graph are shown. The integral operation ki is a function of controlling the remaining amount of the deviation, and when the ki value is fast, the target value is quickly responded, but pressure fluctuations occur. Therefore, a little dull operation is required.

In the above, the proportionality constant kp is kp = MV = Kp.E, and the integration operation ki can be expressed as ki = MV = kp × S / Ki × En.

As described above, in the present invention, when the booster pump is controlled using the flow rate, the pumps of the pump unit are started when the current control value is less than or equal to the target value, and when the current pressure exceeds the target value pressure due to the flow rate being smaller, the pump is pressured. If the inverter power is stopped at a position where the inverter power cannot supply the effective flow rate, the additionally operated pump is stopped by the pressure, power amount and flow rate value.

Then, the current is equal to or greater than the target pressure and the flow rate is stored in the control loop for each section and the flow rate is compared with the present, and the additional motor is stopped only when the inverter operation amount is not able to supply the flow rate.

By driving in this way, the occurrence of additional pump frequent malfunctions can be eliminated due to the difference between the use flow rate and the supply flow rate in a section in which two pumps are started or one is stopped.

In addition, since the booster pump of the present invention is not controlled through the pressure control alone, the pump may be additionally controlled by the high pressure generation abnormality or the impact pressure generation abnormality in the section in which the pump is additionally started or stopped in operation due to the structure of the equipment. This can solve the problem of frequent pump stoppage when starting the engine.

Although the technical idea of the present invention has been described in detail according to the above-described preferred embodiment, the above-described embodiment is for the purpose of description and not of limitation. In addition, it will be understood by those of ordinary skill in the art that various embodiments are possible within the scope of the technical idea of the present invention. Accordingly, the scope of the invention should be defined by the claims rather than by the examples described.

* Explanation of symbols for the main parts of the drawings
10: reservoir 20: reservoir level sensor
30: pump portion 40: pressure sensing unit
50: flow rate sensing unit 60: inverter output unit
61: direct start output unit 70: input unit
80: environmental inspection control loop storage device 90: P eye sub control unit
100: discrimination control unit 110: eye calculation control unit
120: Output section

Claims (2)

Inspecting the booster pump control system and retrieving initial values of the control environment;
A second step of determining whether a current value of the control environment is smaller than a target value;
A third step of, if the current value of the control environment is smaller than a target value, initial operation of the inverter pump, operation of the inverter contactor driving magnetic contactor, and outputting basic data values to the pump unit;
A fourth step of measuring three-element data of an inverter power operation amount, a flow rate value, and a pressure value according to a change in the flow rate of each pump capacity section, and storing the three element data in each control loop storage block of the environmental inspection control loop storage device;
A fifth step of reading the power output by measuring and reading in the flow rate section and checking the data stored in the first and second blocks of the control loop storage blocks and the current situation detected in real time;
A sixth step of collectively outputting the read-out power output amount to immediately match the flow rate of the pump portion;
Measure and read data in the section for each flow rate, and recheck the data stored in the control loop storage blocks and the current value detected in real time, and the flow rate corresponds to a range of 1 to 100%, 101 to 200%, and 201 to 600%. Determining whether the flow rate is increased or decreased according to flow rate;
An eighth step of precisely controlling the pump unit by controlling a direct start output unit and the inverter output unit according to the flow rate determination result;
A ninth step of comparing and determining whether the pressure value before and after the inverter power or the additional power operation matches the required flow rate value;
A tenth step of returning to the ninth step after controlling the flow rate and pressure to be the same temporarily using the eye sub-control unit if the pressure value and the flow rate value do not match; And
If it is determined that the pressure value and the flow rate value is matched, the pump control method using a control system of the booster pump, characterized in that the control step by the eye operation control unit to maintain a constant pressure and flow rate, and returns to the ninth step. The method of claim 1,
In the control loop storage block, in the first block, three-component data of the flow rate value, the pressure value, and the power operation amount when the flow rate change is 0% is stored, and in the second block, when the flow rate change is 1%, Three-element data is stored, the third block stores the three-element data when the flow rate is 100%, the fourth block stores the three-element data when the flow rate is 101%, and the fifth block Three-element data is stored when the flow rate is 200%, and the sixth block is stored in the six-element data when the flow rate is 201%, the pump control method using the control system of the booster pump.

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