CN201742160U - Control system of mobile power supply device - Google Patents

Abstract

The utility model relates to a control system of a movable power supply device, which includes a field control level, a process control level and a remote control level; the field control level includes a digital quantity, an analog quantity acquisition unit, and a relay in the digital quantity acquisition unit The state digital signals collected by the circuit breaker and contactor are transmitted to the process control level; the analog signals collected by the power, frequency, temperature, voltage and current measurement modules in the analog quantity acquisition unit are transmitted to the process control level; the process control level includes programmable The controller and the stepper motor control unit, the signals collected by the field control level are respectively input into the digital and analog input modules, and then output after logical operation by the program processing module; the output digital signals are input into the digital acquisition through the digital output module unit; the output stepper motor control signal is input into the stepper motor driver to drive the stepper motor; the output ends of the program processing module are respectively connected to the computer and the remote control stage through two Ethernet ports; the remote control stage includes a control box and another computer.

Description

A control system of a mobile power supply device

technical field

The utility model relates to a power supply control system, in particular to a control system of a movable power supply device.

Background technique

In the partial discharge test of power transformers, the role of the movable power supply device is very important. Due to the characteristics of high voltage level, large area and complex field environment of the partial discharge test, it puts forward higher requirements for the control system. Currently, the control system of the mobile power supply unit is an analog system. In the preparation process before the test, this control system needs to manually adjust the overvoltage protection relay and the overcurrent protection relay. However, since the accuracy of manual adjustment is difficult to accurately control, multiple calibrations are required to meet the protection requirements. Moreover, during the test, the output of the power supply device is adjusted by manually adjusting the transformer, and the data cannot be read intuitively because an analog meter is used for measurement. Moreover, the voltage regulator is placed in the remote control box, but in the high-power mobile power supply unit, due to the large volume of the voltage regulator, the voltage regulator can only be placed in the mobile power supply unit, and the tester The control system is operated in the power supply unit, which makes it inconvenient for field test personnel to observe the test site as a whole during the test.

Contents of the invention

In view of the above problems, the purpose of this utility model is to provide a control system of a movable power supply device with high efficiency, precision, easy operation and flexibility.

In order to achieve the above object, the utility model adopts the following technical solutions: a control system of a mobile power supply device, which is characterized in that it includes a field control level, a process control level and a remote control level; the field control level includes A digital quantity acquisition unit and an analog quantity acquisition unit, a relay, a circuit breaker and a contactor in the digital quantity acquisition unit perform data acquisition on the state of the mobile power supply device, and the collected state digital signal It is transmitted to the process control stage through the data line; a power measurement module, a frequency measurement module, a temperature measurement module, a voltage measurement module and a current measurement module in the analog quantity acquisition unit are connected to the state of the movable power supply device Perform data acquisition, and transmit the collected analog signal to the process control level through the data line; the process control level includes a programmable controller and a stepper motor control unit, and the digital quantity in the field control level The digital signal and the analog signal collected by the acquisition unit and the analog acquisition unit are respectively input into a digital input module and an analog input module in the programmable controller through the data line, and are passed through a digital input module in the programmable controller. A program processing module outputs after logical operation; the digital signal output by the program processing module is input in the digital quantity acquisition unit through a digital output module; the stepper motor control signal output by the program processing module is input into a step After entering the motor control module, the stepping motor control signal is converted into a pulse command, and input into the stepping motor control unit, and the stepping motor driver in the stepping motor control unit receives the pulse command, drives a The stepper motor works; the output end of the program processing module is also connected to a computer and the remote control stage through two Ethernet ports; the remote control stage includes a control box and another computer, and the control box is connected by a cable The output terminal of the programmable controller is connected to one of the Ethernet ports of the computer through a data cable.

The digital input module adopts a digital input module with optocoupler isolation.

Because the utility model adopts the above technical scheme, it has the following advantages: 1. The digital control system adopted by the utility model includes the field control level, the process control level and the remote control level, even if the field control level or the remote control level of the utility model Being in an abnormal state for a period of time will not lead to the loss of the function of the entire mobile power supply device. Therefore, the utility model has high working efficiency and precision, and also ensures good working reliability. 2. Since the process control level adopted by the utility model includes a programmable controller and a stepping motor control unit, the programmable controller processes various digital signals and analog signals collected by the on-site control level through the program processing module, respectively realizing the control of The control of the digital quantity acquisition unit and the stepper motor control unit in the field control level, and input various signals into the computer in the process control level and the computer in the remote control level, and display them on the touch screen to form the user-required The control system, therefore, can adapt to various test site work requirements, and is easy and flexible to operate. 3. The utility model adopts a stepper motor control module in the programmable controller, and the stepper motor control module inputs the control signal into the stepper motor control unit, so it avoids placing a larger voltage regulator in the The inconvenience caused to the operator when the mobile power supply device is in the middle, at the same time, overcomes the problem that the manual adjustment is difficult to ensure the accuracy. 4. Since the utility model is equipped with a computer in the process control level and the remote control level, it can visually record various signals collected by the field control level, and can realize real-time monitoring of all measurement signals, and the recording is intuitive and simple , It is also possible to store the collected data in each computer, and then realize the horizontal comparison of multiple measurement data. 5. Since the utility model adopts modularization and standardization for installation, when a fault occurs, only the faulty module needs to be replaced, so the installation is convenient and fast, and the maintenance is simple. The utility model can be widely used in various partial discharge test power supply control systems.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

As shown in FIG. 1 , the control system of the present invention is a digital control system, which includes a field control level 10 , a process control level 30 and a remote control level 50 .

The field control level 10 comprises a digital quantity acquisition unit 11 and an analog quantity acquisition unit 12, a relay 13, a circuit breaker 14 and a contactor 15 in the digital quantity acquisition unit 11 carry out data acquisition to the state of the movable power supply device, and the The collected status digital signals of relays, circuit breakers and contactors are transmitted to the process control level 30 through data lines. A power measurement module 16, a frequency measurement module 17, a temperature measurement module 18, a voltage measurement module 19 and a current measurement module 20 in the analog quantity acquisition unit 12 carry out data acquisition to the state of the movable power supply device, and the acquired Analog signals such as power, frequency, temperature, voltage and current are also transmitted to the process control level 30 via data lines.

The process control level 30 comprises a PLC (programmable logic controller) 31 and a stepper motor control unit 32, and the digital signal and the analog signal collected by the digital quantity acquisition unit 11 and the analog quantity acquisition unit 12 in the field control level 10 are passed through the data line They are respectively input into a digital input module 33 with optocoupler isolation and an analog input module 34 in PLC31, and are output after logical operation by a program processing module 35 in PLC31. The digital quantity signal output by program processing module 35 is input in the digital quantity acquisition unit 11 through a digital quantity output module 36, realizes the control to relay, circuit breaker and contactor; After entering the motor control module 37, the stepping motor control signal is converted into a pulse command, and input into the stepping motor control unit 32, thereby realizing the voltage regulation function. After the stepper motor driver 38 in the stepper motor control unit 32 receives the pulse command, it drives the stepper motor 39 to work; the output end of the program processing module 35 also passes through two Ethernet ports (LAN1) 40, (LAN2) 41 respectively. A computer 42 and remote control stage 50 are connected. After receiving the signal transmitted by the program processing module 35, the computer 42 can monitor and display all data and can operate and control the portable power supply device of the present invention.

The remote control level 50 includes a control box 51 and another computer 52, the control box 51 is connected to the output end of the PLC31 through a cable, and the computer 52 is connected to the Ethernet port 41 through a data line, and all data received are monitored and displayed for convenience. Field test personnel operate and record data, and then realize the remote control of the portable power supply device of the present invention by the control box 51 and the computer 52 .

The above-mentioned embodiments are only used to illustrate the utility model, wherein the structure and connection mode of each component can be changed, and any equivalent transformation and improvement carried out on the basis of the technical solution of the utility model should not be excluded. Outside the scope of protection of the present utility model.

Claims (2)

1. A control system for a movable power supply unit, characterized in that: it comprises a field control level, a process control level and a remote control level; The on-site control stage includes a digital quantity acquisition unit and an analog quantity acquisition unit, a relay, a circuit breaker and a contactor in the digital quantity acquisition unit perform data acquisition on the state of the mobile power supply device, and The collected state digital signal is transmitted to the process control stage through the data line; a power measurement module, a frequency measurement module, a temperature measurement module, a voltage measurement module and a current measurement module in the analog quantity acquisition unit Collecting data on the state of the movable power supply device, and transmitting the collected analog signal to the process control level through the data line; The process control level includes a programmable controller and a stepping motor control unit, and the digital signal and the analog signal collected by the digital quantity acquisition unit and the analog quantity acquisition unit in the field control level are respectively input into the programmable controller through the data line. A digital quantity input module and an analog quantity input module in the programmable controller, and output after a logic operation is performed by a program processing module in the programmable controller; the digital quantity signal output by the program processing module is passed through a The digital output module is input into the digital quantity acquisition unit; after the stepper motor control signal output by the program processing module is input into the stepper motor control module, the stepper motor control signal is converted into a pulse command, and input into the stepper motor control signal. In the motor control unit, after the step motor driver in the step motor control unit receives the pulse command, it drives the step motor to work; the output end of the program processing module is also connected to a computer via two Ethernet ports and said remote control stage; The remote control stage includes a control box and another computer, the control box is connected to the output end of the programmable controller through a cable, and the computer is connected to one of the Ethernet ports through a data cable. 2. A control system for a mobile power supply device according to claim 1, wherein the digital input module is a digital input module with optocoupler isolation.

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