CN212627143U - Profibus-DP-based motor protection control system - Google Patents

Profibus-DP-based motor protection control system Download PDF

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Publication number
CN212627143U
CN212627143U CN202021906349.9U CN202021906349U CN212627143U CN 212627143 U CN212627143 U CN 212627143U CN 202021906349 U CN202021906349 U CN 202021906349U CN 212627143 U CN212627143 U CN 212627143U
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controller
protection control
module
profibus
motor
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CN202021906349.9U
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Chinese (zh)
Inventor
王俊贵
张小伟
李武朋
田超
白小龙
吕旭超
张振
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Shaanxi Shangluo Power Generation Co ltd
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Shaanxi Shangluo Power Generation Co ltd
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Abstract

The utility model relates to a Profibus-DP based motor protection control system, which comprises a monitoring terminal, a protection control device and a motor, wherein the monitoring terminal and the motor are respectively connected with the protection control device; the protection control device includes: the system comprises a Profibus-DP interface, a current detection module, a voltage detection module, a first contactor, a second contactor, an alarm module and a controller, wherein the Profibus-DP interface, the current detection module, the voltage detection module, the first contactor, the second contactor and the alarm module are respectively connected with the controller; the Profibus-DP interface is arranged on the controller and used for connecting the welding DP bus with the monitoring terminal and receiving a control signal of the monitoring terminal; the utility model discloses Profibus-DP interface is reserved to inside, and DP bus cable's fixed position prevents to damage the cable when taking out and closing the cubical switchboard promptly. And meanwhile, the detection, protection and conventional control of current, voltage and switch states are finished.

Description

Profibus-DP-based motor protection control system
Technical Field
The utility model belongs to the technical field of the motor protection, concretely relates to based on Profibus-DP motor protection control system.
Background
With the application of electric intellectualization and automation in China, the reliability and interference indexes of the traditional motor protection control device in the system need to be improved.
In the related art, with the development of communication technology and sensor technology, fieldbus motor protection controller technology has been gradually applied to auxiliary workshops of coal-fired units in thermal power plants. For reasons of the early state of the art just after use, coal-fired power plants which were put into operation in recent years have had different failures in the application of motor protection controllers (for protecting, controlling electric motors and for implementing remote four-remote functions). Because the traditional motor protection controller needs to be connected with a cable in a plugging mode, the cable is damaged when the switch cabinet is pulled out and closed, or the switch cabinet cannot be opened due to the fact that the cable is clamped.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at overcoming the not enough of prior art, provide a based on Profibus-DP motor protection control system to solve among the prior art and damage the cable when taking out and closing the cubical switchboard, or lead to the cubical switchboard not to open because of cliping the cable problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a Profibus-DP based motor protection control system comprising: the monitoring terminal and the motor are respectively connected with the protection control device;
the protection control device includes:
the device comprises a Profibus-DP interface, a current detection module, a voltage detection module, a first contactor, a second contactor, an alarm module and a controller, wherein the Profibus-DP interface, the current detection module, the voltage detection module, the first contactor, the second contactor and the alarm module are respectively connected with the controller;
the Profibus-DP interface is arranged on the controller and used for connecting a welding DP bus with a monitoring terminal and receiving a control signal of the monitoring terminal;
the current detection module is used for detecting the current change of the motor;
the voltage detection module is used for detecting the voltage change of the motor;
the first contactor is used for controlling the motor to rotate forwards;
the second contactor is used for controlling the motor to reversely rotate;
the controller is used for sending an alarm signal to the alarm module to give an alarm when detecting that the current and the voltage are abnormal, and the controller is also used for sending detection data of the current and the voltage to the monitoring terminal.
Further, the protection control device further includes:
the DCS brake separating module is connected with the monitoring terminal and receives a control signal of the monitoring terminal to the motor;
and the DCS brake separating module is connected with the controller.
Further, the protection control device further includes:
the fault self-detection module is connected with the controller;
the fault self-detection module is used for sending fault information generated by the protection control device to the controller, and the controller receives the fault information to control the alarm module to carry out fault alarm reminding.
Further, the protection control device further includes: a circuit breaker and a circuit breaker testing module;
the circuit breaker is connected with the controller and is used for performing circuit breaking protection when the current and the voltage are abnormal;
the circuit breaker testing module is used for detecting parameters of the circuit breaker.
Further, the protection control device further includes:
the DI module is used for monitoring the state of a circuit breaker, the state of a contactor and the access state of the monitoring terminal;
the DI module is connected with the controller.
Further, the protection control device further includes:
the RS485 interface is used for connecting external equipment;
and the RS485 interface is connected with the controller.
Further, the protection control device further includes:
the display module is used for displaying four-remote information;
the display module is connected with the controller.
Further, the protection control device further includes:
and the controller auxiliary power supply is used for supplying electric energy to the controller.
Further, the first contactor and the second contactor are both normally closed contactors.
Further, the controller is of a model of PSM 400.
The utility model adopts the above technical scheme, the beneficial effect that can reach includes:
the utility model discloses Profibus-DP interface is reserved to inside, and DP bus cable's fixed position prevents to damage the cable when taking out and closing the cubical switchboard promptly. And meanwhile, the detection, protection and conventional control of current, voltage and switch states are finished.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a Profibus-DP-based motor protection control system according to the present invention;
fig. 2 is a schematic structural diagram of the protection and control device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
A specific Profibus-DP based motor protection control system provided in an embodiment of the present application is described below with reference to the accompanying drawings.
As shown in fig. 1, the Profibus-DP-based motor protection control system provided in the embodiment of the present application includes a monitoring terminal 1, a protection control device 2, and an electric motor 3, where the monitoring terminal 1 and the electric motor 3 are respectively connected to the protection control device 2;
as shown in fig. 2, the protection control device 2 includes:
the device comprises a Profibus-DP interface 201, a current detection module 202, a voltage detection module 203, a first contactor 204, a second contactor 205, an alarm module 206 and a controller 207, wherein the Profibus-DP interface 201, the current detection module 202, the voltage detection module 203, the first contactor 204, the second contactor 205 and the alarm module 206 are respectively connected with the controller 207;
the Profibus-DP interface 201 is arranged on the controller 207, and is used for connecting a welding DP bus to the monitoring terminal 1 and receiving a control signal of the monitoring terminal 1;
the current detection module 202 is used for detecting the current change of the motor 3;
the voltage detection module 203 is used for detecting the voltage change of the motor 3;
the first contactor 204 is used for controlling the motor 3 to rotate forwards;
the second contactor 205 is used for controlling the motor 3 to rotate reversely;
the controller 207 is configured to send an alarm signal to the alarm module 206 for alarming when detecting that the current and the voltage are abnormal, and the controller 207 is further configured to send detection data of the current and the voltage to the monitoring terminal 1.
The work principle of the Profibus-DP based motor protection control system is as follows: the change conditions of the current and the voltage of the motor 3 are detected by the protection control device 2, and when the change of the current and the voltage exceeds a preset value, an alarm is given. Even if the staff is notified to perform the process. In addition, weld DP bus connection monitor terminal 1 on controller 207 in this application for controller 207 and monitor terminal 1 adopt bus cable directly to link, need not through the plug, have reduced the middleware, prevent to damage the cable when taking out and closing the cubical switchboard, avoid not opening because of cliping the cable and leading to the cubical switchboard. The monitoring terminal 1 can remotely control the positive rotation, starting and stopping of the motor through the DP bus. The controller 207 can transmit the four-remote information to the monitoring terminal 1 through the DP bus, and the influence of the intermediate impedance link on communication is reduced by adopting the connection mode, so that the precision of measured data is high. The Profibus-DP protocol is adopted in the application, secondary development and utilization of third-party software are supported, and compatibility is high.
Wherein, the four-remote information comprises:
telemetry (telemetry information): and (4) remote measurement. And collecting and transmitting operation parameters including various electric quantities, load flow and the like.
Remote signaling (remote signaling information): a remote signal. Various protection and switching value information is collected and transmitted.
Remote control (remote control information): and (5) remote control. And receiving and executing a remote control command, mainly switching on and off.
Remote tuning (remote tuning information): and (4) remote adjustment. And receiving and executing a remote regulation command to regulate the output power of the generator.
This application just can connect 24 Profibus-DP motor protection controller 207 devices with two DP cables, compares reduction cable and installation laying cost by a wide margin with conventional motor protection controller 207 device.
In some embodiments, the protection control device 2 further includes:
the DCS brake separating module is connected with the monitoring terminal 1 and receives a control signal of the monitoring terminal 1 to the motor 3;
the DCS brake separating module is connected with the controller 207.
The motor protection controller 207 adopts a plurality of communication interfaces, and communication abnormity of the motor protection controller 207 can not be caused when any communication component of the device or a DP link connected with the device is in fault.
In some embodiments, the protection control device 2 further includes:
a fault self-detection module connected with the controller 207;
the fault self-detection module is configured to send fault information generated by the protection control device 2 to the controller 207, and the controller 207 receives the fault information to control the alarm module 206 to perform fault alarm reminding.
Specifically, the fault self-detection module detects fault information generated by the protection control device 2, so that alarm reminding can be performed when the device fails, and control, monitoring and fault diagnosis and processing of the device are facilitated.
It is understood that the fault self-detection module includes: the current signal detection unit and the voltage signal detection unit may further include other units, which are not limited herein.
Preferably, in the system provided in the present application, the protection control device 2 further includes: a circuit breaker and a circuit breaker testing module;
the circuit breaker is connected with the controller 207 and is used for performing circuit breaking protection when current and voltage are abnormal;
the circuit breaker testing module is used for detecting parameters of the circuit breaker.
When the current detection module 202 or the voltage detection module 203 in the protection control device 2 detects an abnormality, the controller 207 can control the alarm module 206 to alarm and also control the circuit breaker to open the circuit, thereby protecting the safety of the whole circuit.
If the fault cannot be determined to be a circuit fault or a breaker fault, an experiment can be performed by the breaker testing module to determine whether the breaker fault or the circuit has a fault.
Wherein, the alarm module 206 adopts an audible and visual alarm.
Preferably, the protection control device 2 further includes:
the DI module is used for monitoring the state of a circuit breaker, the state of a contactor and the access state of the monitoring terminal 1;
the PI module is used for collecting frequency quantity information of the motor 3;
the DI module and the PI module are respectively connected to the controller 207.
Specifically, the DI module adopts the DI mouth, gathers the circuit breaker state and monitor terminal 1's access state, and the circuit breaker state includes circuit breaker on-off state, and the contactor state includes contactor on-off state, and monitor terminal 1's access state is including inserting or off-state. The PI module adopts a PI port and is used for collecting a rotating speed signal of the electric vehicle.
Preferably, the protection control device 2 further includes:
the RS485 interface is used for connecting external equipment;
the RS485 interface is connected to the controller 207.
The RS485 interface may transmit data received by the controller 207 to the outside. The RS485 interface is adopted, so that the communication speed is high, and the transmission distance is long. When the RS485 serial communication distance is 1.2Km, the communication speed is 93.75kbit/s or below, and the highest speed within 100m can reach 12 Mbit/s.
Preferably, the protection control device 2 further includes:
the display module is used for displaying four-remote information;
the display module is connected to the controller 207.
This application is equipped with display module on protection controlling means 2, and display module adopts liquid crystal display, and the staff can directly look over four distant information through protection controlling means 2, convenient and fast more.
Preferably, the protection control device 2 further includes:
a controller auxiliary power supply for supplying power to the controller 207.
Preferably, the first contactor 204 and the second contactor 205 are both normally closed contactors.
Preferably, the controller 207 is of the PSM 400.
To sum up, the utility model provides a motor protection control system based on Profibus-DP, which comprises a monitoring terminal, a protection control device and a motor, wherein the monitoring terminal and the motor are respectively connected with the protection control device; the protection control device includes: the system comprises a Profibus-DP interface, a current detection module, a voltage detection module, a first contactor, a second contactor, an alarm module and a controller, wherein the Profibus-DP interface, the current detection module, the voltage detection module, the first contactor, the second contactor and the alarm module are respectively connected with the controller; the Profibus-DP interface is arranged on the controller and used for connecting the welding DP bus with the monitoring terminal and receiving a control signal of the monitoring terminal; the utility model discloses Profibus-DP interface is reserved to inside, and DP bus cable's fixed position prevents to damage the cable when taking out and closing the cubical switchboard promptly. And meanwhile, the detection, protection and conventional control of current, voltage and switch states are finished.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A Profibus-DP based motor protection control system, comprising: the monitoring terminal and the motor are respectively connected with the protection control device;
the protection control device includes:
the device comprises a Profibus-DP interface, a current detection module, a voltage detection module, a first contactor, a second contactor, an alarm module and a controller, wherein the Profibus-DP interface, the current detection module, the voltage detection module, the first contactor, the second contactor and the alarm module are respectively connected with the controller;
the Profibus-DP interface is arranged on the controller and used for connecting a welding DP bus with a monitoring terminal and receiving a control signal of the monitoring terminal;
the current detection module is used for detecting the current change of the motor;
the voltage detection module is used for detecting the voltage change of the motor;
the first contactor is used for controlling the motor to rotate forwards;
the second contactor is used for controlling the motor to reversely rotate;
the controller is used for sending an alarm signal to the alarm module to give an alarm when detecting that the current and the voltage are abnormal, and the controller is also used for sending detection data of the current and the voltage to the monitoring terminal.
2. The Profibus-DP based motor protection control system according to claim 1, wherein said protection control means further comprises:
the DCS brake separating module is connected with the monitoring terminal and receives a control signal of the monitoring terminal to the motor;
and the DCS brake separating module is connected with the controller.
3. The Profibus-DP based motor protection control system according to claim 1, wherein said protection control means further comprises:
the fault self-detection module is connected with the controller;
the fault self-detection module is used for sending fault information generated by the protection control device to the controller, and the controller receives the fault information to control the alarm module to carry out fault alarm reminding.
4. The Profibus-DP based motor protection control system according to claim 3, wherein said protection control means further comprises: a circuit breaker and a circuit breaker testing module;
the circuit breaker is connected with the controller and is used for performing circuit breaking protection when the current and the voltage are abnormal;
the circuit breaker testing module is used for detecting parameters of the circuit breaker.
5. The Profibus-DP based motor protection control system according to claim 1, wherein said protection control means further comprises:
the DI module is used for monitoring the state of a circuit breaker, the state of a contactor and the access state of the monitoring terminal;
the PI module is used for collecting frequency quantity information of the motor;
the DI module and the PI module are respectively connected with the controller.
6. The Profibus-DP based motor protection control system according to claim 1, wherein said protection control means further comprises:
the RS485 interface is used for connecting external equipment;
and the RS485 interface is connected with the controller.
7. The Profibus-DP based motor protection control system according to claim 1, wherein said protection control means further comprises:
the display module is used for displaying four-remote information;
the display module is connected with the controller.
8. The Profibus-DP based motor protection control system of claim 7, wherein said protection control means further comprises:
and the controller auxiliary power supply is used for supplying electric energy to the controller.
9. The Profibus-DP based motor protection control system of claim 1, wherein the first and second contactors are both normally closed contactors.
10. The Profibus-DP based motor protection control system according to claim 1, wherein said controller is of the PSM400 type.
CN202021906349.9U 2020-09-03 2020-09-03 Profibus-DP-based motor protection control system Active CN212627143U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021906349.9U CN212627143U (en) 2020-09-03 2020-09-03 Profibus-DP-based motor protection control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021906349.9U CN212627143U (en) 2020-09-03 2020-09-03 Profibus-DP-based motor protection control system

Publications (1)

Publication Number Publication Date
CN212627143U true CN212627143U (en) 2021-02-26

Family

ID=74705346

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021906349.9U Active CN212627143U (en) 2020-09-03 2020-09-03 Profibus-DP-based motor protection control system

Country Status (1)

Country Link
CN (1) CN212627143U (en)

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