CN215990627U - Intelligent system device for switching power frequency drive into variable frequency drive in online undisturbed manner - Google Patents
Intelligent system device for switching power frequency drive into variable frequency drive in online undisturbed manner Download PDFInfo
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- CN215990627U CN215990627U CN202023059281.8U CN202023059281U CN215990627U CN 215990627 U CN215990627 U CN 215990627U CN 202023059281 U CN202023059281 U CN 202023059281U CN 215990627 U CN215990627 U CN 215990627U
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Abstract
The utility model relates to an intelligent system device for switching power frequency drive into variable frequency drive on line without disturbance, which can effectively solve the problem that asynchronous switching in the prior art can cause the fault of an inversion unit of a variable frequency speed regulator or the protective shutdown.
Description
Technical Field
The utility model relates to a PLC control technology, in particular to an intelligent system device for switching power frequency drive into variable frequency drive in an online undisturbed manner.
Background
In actual industrial control production, when a variable frequency speed regulator of driving equipment breaks down, the equipment can be switched into power frequency driving operation in an automatic or manual mode. After the fault of the variable frequency speed regulator is eliminated, because the phase and amplitude difference exists between the variable frequency driving output power supply and the power frequency driving power supply, equipment operated at power frequency needs to be manually stopped, and then the variable frequency speed regulator is operated at variable frequency. At present, the process of switching from power frequency to frequency conversion can interrupt the operation of equipment, and different production processes are influenced by different degrees. Because the phase and amplitude of the power frequency power supply driven by the power frequency or the rotating speed and voltage of the equipment after power failure are asynchronous with the phase and amplitude of the power supply modulated by the inverter of the variable frequency speed regulator, when the power frequency drive is switched to the variable frequency drive, the asynchronous switching can cause the fault of the inverter unit of the variable frequency speed regulator or the protection shutdown, and a large amount of operators are required to cooperate in the switching operation process, the operation is more complex, and greater risk exists. Therefore, the problem that needs to be solved at present is to switch the power frequency into the improvement of the frequency conversion device.
Disclosure of Invention
In view of the above situation, in order to solve the defects of the prior art, the present invention aims to provide an intelligent system device for online undisturbed switching of power frequency driving into variable frequency driving, which can effectively solve the problem that asynchronous switching in the prior art can cause failure of an inverter unit of a variable frequency speed regulator or shutdown protection.
The technical scheme includes that the device comprises a switching control device, a power frequency driving cabinet, a variable frequency driving cabinet and an original process control DCS station, wherein the switching control device is connected with the power frequency driving cabinet through an electrical interface I, the switching control device is connected with the variable frequency driving cabinet through an electrical interface II, the switching control device is connected with the original process control DCS station through an electrical interface III, the power frequency driving cabinet is connected with a power frequency power supply, the variable frequency driving cabinet is connected with a variable frequency power supply, the power frequency driving cabinet is connected with a voltage transformer TV2 through a power frequency switch KM1, the voltage transformer TV2 is connected with production equipment to form a first loop, a frequency converter arranged in the variable frequency driving cabinet is connected with the voltage transformer TV1 through an inductance coil L, the voltage transformer TV1 is connected with a frequency converter outlet switch KM2, and a frequency converter outlet switch KM2 is connected with the production equipment through the voltage transformer TV2 to form a second loop.
The utility model can realize the undisturbed switching to the variable frequency driving operation of the equipment driven by the power frequency, realizes the automatic switching, is safe and reliable, greatly improves the switching efficiency, saves the labor cost, and is an innovation for changing the power frequency into the variable frequency device.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Fig. 2 is a diagram of the electrical interface distribution of the present invention.
Fig. 3 is a wiring diagram of the electrical interface control of the switching control device and the power frequency driving cabinet of the utility model.
Fig. 4 is a control wiring diagram of the electrical interface of the switching control device and the variable frequency driving cabinet of the utility model.
Fig. 5 is a control wiring diagram of the electrical interface of the switching control device and the original process control DCS station of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The utility model is shown by figures 1-5, the utility model comprises a switching control device, a power frequency driving cabinet, a variable frequency driving cabinet and an original process control DCS station, wherein the switching control device is connected with the power frequency driving cabinet through an electrical interface I, the switching control device is connected with the variable frequency driving cabinet through an electrical interface II, the switching control device is connected with the original process control DCS station through an electrical interface III, the power frequency driving cabinet is connected with a power frequency power supply, the variable frequency driving cabinet is connected with a variable frequency power supply, the power frequency driving cabinet is connected with a voltage transformer TV2 through a power frequency switch KM1, the voltage transformer TV2 is connected with production equipment to form a first loop, a frequency converter arranged in the variable frequency driving cabinet is connected with the voltage transformer TV1 through an inductance coil L, the voltage transformer TV1 is connected with a frequency converter outlet switch KM2, and the frequency converter outlet switch KM2 is connected with the production equipment through the voltage transformer TV2 to form a second loop.
In order to ensure the use effect, a PLC programmable logic controller is arranged in the switching control device.
The type of the frequency converter is Siemens 6SL32101KE226UF1G 120.
The electric interface is characterized in that an XTDI1-DI1 control terminal 1 of the switching control device is connected with a DO1 negative pole of the power frequency driving cabinet, an XTDI1-DI1 control terminal 2 is connected with a DO1 positive pole, an XTDI1-DI1 control terminal 3 is connected with a DO2 negative pole, an XTDI1-DI1 control terminal 4 is connected with a DO2 positive pole, an XTDQ1-DQ1 control terminal 1 of the switching control device is connected with a DI1 negative pole of the power frequency driving cabinet, an XTDQ1-DQ1 control terminal 2 is connected with a DI1 positive pole, an XTDQ1-DQ1 control terminal 3 is connected with a DI2 negative pole, and an XTDQ1-DQ1 control terminal 4 is connected with a DI2 positive pole.
The electric interface is characterized in that an XTDI2-DI1 control terminal 1 of the switching control device is connected with a DO1 negative electrode of the variable frequency drive cabinet, an XTDI2-DI1 control terminal 2 is connected with a DO1 positive electrode, an XTDI2-DI1 control terminal 3 is connected with a DO2 negative electrode, an XTDI2-DI1 control terminal 4 is connected with a DO2 positive electrode, an XTAT-AI1 control terminal 1 is connected with an AO1 negative electrode, an XTAT-AI1 control terminal 2 is connected with an AO1 positive electrode, an XTAT-AI1 control terminal 3 is connected with an AO2 negative electrode, an XTAT-AI1 control terminal 4 is connected with an AO2 positive electrode, an XTAQAQAQAQ-AQ 1 control terminal 1 is connected with an AI1 negative electrode, an XT-AQ 1 control terminal 2 is connected with an AI1 positive electrode, an XTCI-COM1 control terminal 1 is connected with an XTCI data communication acquisition interface negative electrode, and an XTCI-COM1 control terminal is connected with a data acquisition interface.
The electric interface (c) is an XTCI-COM2 communication interface R + of the switching control device connected with a communication interface R + of the original process control DCS station, an XTCI-COM2 communication interface R-is connected with a communication interface R-of the original process control DCS station, an XTCI-COM2 communication interface D + is connected with a communication interface D + of the original process control DCS station, and an XTCI-COM2 communication interface D-is connected with a communication interface D-of the original process control DCS station.
The use condition of the utility model is that the device switches the satisfied working state:
(1) the original process controls the normal operation condition of equipment in the DCS station;
(2) the original speed regulating device operates normally and has no fault;
(3) in the system switching control device, the KM1 is in a closed position, and the KM2 is in an open position;
(4) the power frequency drives the cabinet QF02 in the closed position and detects the activity;
(5) the switching control device has no fault, and the switching system is in the running state;
the specific switching logic of the device of the utility model is as follows:
(1) the switching control cabinet carries out communication data interaction with an original process control DCS station in real time so as to determine various working condition parameters of equipment operation;
(2) the switching control device is put into operation to allow work;
(3) comparing the phase and amplitude detected by the TV1 and the TV2, and adjusting the control of the variable frequency driving cabinet to change the phase and amplitude detected by the TV 1;
(4) when the phase and amplitude detected by the TV1 and the TV2 are in an allowable range, the PLC sends out a synchronization command;
(5) after receiving the synchronous instruction, the variable frequency driving cabinet locks the control data and keeps the current state;
(6) after the synchronous instruction arrives, the switching control device controls KM2 to close;
(7) after the KM2 is successfully closed, the switching control device controls the power frequency driving cabinet to disconnect QF 02;
(8) after QF02 is successfully disconnected, KM1 is controlled to be disconnected;
(9) all the state switching control systems can be sent to the original process control DCS station through the electrical interface 4 in real time, and the operation personnel can conveniently check and store the state switching control systems.
(10) If the KM2 closing is unsuccessful in the step 6, the system can be overlapped from the step 3 again, and the overlapping is unsuccessful for 3 times, the operation is unsuccessful, and manual operation confirmation is needed.
The utility model adopts the programmable controller to collect the running state of the speed regulator device in real time, detects the phase and amplitude output by the variable frequency drive cabinet through the TV1, detects the phase and amplitude output by the power frequency drive cabinet through the TV2, performs switching control through the KM1 and the KM2, ensures that the power frequency drive and the variable frequency drive run in parallel under the synchronous state through high-speed processing of the high-performance programmable controller, drives equipment to run, thereby ensuring continuous and uninterrupted operation of the equipment, ensuring no impact in the switching process, having no disturbance switching on production and equipment, having high automation, having no manual intervention in the whole process, having fault diagnosis function, having intuitive and clear various fault information and simple and convenient operation, sending sound and light to prompt operators if the system fails to switch on line, and sending various running states of the system to a central control room such as a central monitoring room and the like, being an innovation of switching from the power frequency to the variable frequency device, has good economic and social benefits.
Claims (6)
1. An intelligent system device for switching power frequency drive into variable frequency drive on line without disturbance is characterized by comprising a switching control device and a power frequency drive cabinet, the frequency conversion drive cabinet is connected with the power frequency drive cabinet through an electrical interface, the switching control device is connected with the frequency conversion drive cabinet through an electrical interface, the switching control device is connected with the original process control DCS station through an electrical interface, the power frequency drive cabinet is connected with a power frequency power supply, the frequency conversion drive cabinet is connected with the frequency conversion power supply, the power frequency drive cabinet is connected with a voltage transformer TV2 through a power frequency switch KM1, the voltage transformer TV2 is connected with production equipment to form a first loop, a frequency converter arranged in the frequency conversion drive cabinet is connected with the voltage transformer TV1 through an inductance coil L, the voltage transformer TV1 is connected with a frequency converter outlet switch KM2, and the frequency converter outlet switch KM2 is connected with the production equipment through the voltage transformer TV2 to form a second loop.
2. The intelligent system device for line-frequency drive online undisturbed switching to variable-frequency drive according to claim 1, wherein a PLC programmable logic controller is installed in the switching control device.
3. The intelligent system device for line-frequency drive online undisturbed switching to variable-frequency drive as claimed in claim 1, wherein the type of the frequency converter is siemens 6SL32101KE226UF1G 120.
4. The intelligent system device for power-frequency-driven online undisturbed switching to variable-frequency driving according to claim 1, wherein the electrical interface (i) is that an XTDI1-DI1 control terminal 1 of the switching control device is connected with a DO1 negative electrode of the power-frequency driving cabinet, an XTDI1-DI1 control terminal 2 is connected with a DO1 positive electrode, an XTDI1-DI1 control terminal 3 is connected with a DO2 negative electrode, an XTDI1-DI1 control terminal 4 is connected with a DO2 positive electrode, an XTDQ1-DQ1 control terminal 1 of the switching control device is connected with a DI1 negative electrode of the power-frequency driving cabinet, an XTDQ1-DQ1 control terminal 2 is connected with a DI1 positive electrode, an XTDQ1-DQ1 control terminal 3 is connected with a DI2 negative electrode, and an XTDQ1-DQ1 control terminal 4 is connected with a DI2 positive electrode.
5. The intelligent system device for power frequency drive online undisturbed switching to variable frequency drive according to claim 1, wherein the electrical interface comprises XTDI2-DI1 control terminal 1 of the switching control device connected with DO1 cathode of the variable frequency drive cabinet, XTDI2-DI1 control terminal 2 connected with DO1 anode, XTDI2-DI1 control terminal 3 connected with DO2 cathode, XTDI2-DI1 control terminal 4 connected with DO2 anode, XTAT-AI1 control terminal 1 connected with AO1 cathode, AT-AI1 control terminal 2 connected with AO1 anode, XTAT-AI1 control terminal 3 connected with AO2 cathode, XTAT-AI1 control terminal 4 connected with AO2 anode, XTAQ-AQ1 control terminal 1 connected with XT 1 cathode, XTAQ-AQ1 control terminal 2 connected with XTAI 1 anode, and COM-AI 1 control terminal connected with COM data acquisition interface, and the XTCI-COM1 control terminal 2 is connected with the positive pole of the data communication acquisition interface.
6. The intelligent system device for power frequency drive online undisturbed switching to variable frequency drive of claim 1, wherein the electrical interface (R) is an XTCI-COM2 communication interface R + of the switching control device connected with a communication interface R + of an original process control DCS station, an XTCI-COM2 communication interface R-is connected with a communication interface R-of the original process control DCS station, an XTCI-COM2 communication interface D + is connected with a communication interface D + of the original process control DCS station, and an XTCI-COM2 communication interface D-is connected with a communication interface D-of the original process control DCS station.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023059281.8U CN215990627U (en) | 2020-12-18 | 2020-12-18 | Intelligent system device for switching power frequency drive into variable frequency drive in online undisturbed manner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023059281.8U CN215990627U (en) | 2020-12-18 | 2020-12-18 | Intelligent system device for switching power frequency drive into variable frequency drive in online undisturbed manner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600484A (en) * | 2020-12-18 | 2021-04-02 | 河南科锐特科技发展有限公司 | Intelligent system device for switching power frequency drive into variable frequency drive in online undisturbed manner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600484A (en) * | 2020-12-18 | 2021-04-02 | 河南科锐特科技发展有限公司 | Intelligent system device for switching power frequency drive into variable frequency drive in online undisturbed manner |
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