CN204290503U - Integral intelligent AC power case - Google Patents

Abstract

The utility model discloses integral intelligent AC power case, be applied to comprise in the low-voltage distribution system of main website, it is characterized in that power supply box comprises: DSP subsystem, ARM subsystem and CPLD; DSP subsystem controls for realizing measuring, protect and exporting; ARM subsystem is used for realizing communication and keyboard & display; DSP subsystem carries out exchanges data by CPLD and ARM subsystem.The utility model can realize long-range real time on-line monitoring, protection and control to distribution line, prevents and avoid the generation of accident, greatly improves safe distribution of electric power operation level and power supply reliability, facilitates operation maintenance personnel to fix a breakdown in time.

Description

Integrated intelligent AC power box

technical field

The utility model relates to an AC power on-line measurement and control device, in particular to an integrated intelligent power supply box for an AC power on-line measurement and control in a substation.

Background technique

At present, my country's power system is developing rapidly in the direction of large power grid, high reliability and high automation level. The level of automatic and intelligent monitoring of power grid operation has become a key issue in the development of my country's power system. With the economic development of our country, social power consumption is also increasing day by day, and the power load of high-voltage electrical equipment such as transformers, transformers, switches, high-voltage switchgear, cables, etc., which carry large power transmission tasks, is also increasing rapidly. With the development of the power grid and the advancement of electric power technology, the level of automation and informatization of power system substations has been continuously improved, and the substations have basically realized unmanned or few people on duty.

Substations usually use ordinary power systems to conduct regular manual inspections on the operating status of electrical equipment in operation. The technical means and traditional methods are far from meeting the automation requirements of substation operation management. Intelligent online real-time monitoring and control.

Utility model content

The utility model provides an integrated intelligent AC power supply box to solve the shortcomings of the above-mentioned prior art, in order to realize remote real-time online monitoring, protection and control of power distribution lines, prevent and avoid accidents, and greatly improve The safe operation level of power distribution and the reliability of power supply are convenient for operation and maintenance personnel to troubleshoot in time.

The utility model adopts following technical scheme for solving technical problems:

The integrated intelligent AC power supply box of the utility model is applied in a low-voltage power distribution system including a main station, and is characterized in that the power supply box includes: a DSP subsystem, an ARM subsystem and a CPLD;

The DSP subsystem is used to realize measurement, protection and output control;

The ARM subsystem is used to realize communication and keyboard display;

The DSP subsystem exchanges data with the ARM subsystem through the CPLD.

The feature of the integrated intelligent AC power supply box described in the utility model is also that: the DSP subsystem includes a DSP chip, an A/D sampling chip and an output control circuit; the ARM subsystem includes: an ARM chip, a touch screen, an Ethernet Interface and RS485 bus communication interface;

The ARM subsystem uses the ARM chip to control the Ethernet interface and the RS485 bus communication interface to obtain the control command sent by the master station or control the touch screen to obtain a manual control command and send it to the DSP subsystem, The DSP subsystem obtains the control command through the CPLD and uses the DSP chip to drive the output control circuit to close or open the corresponding distribution line;

The DSP subsystem utilizes the DSP chip to control the A/D sampling chip to sample the instantaneous values of voltages and currents in real time and make logical judgments, and then utilizes the output control circuit to perform protection control; the DSP subsystem will The collected electrical parameters and control status of each power distribution line are transmitted to the ARM subsystem through the CPLD, and then uploaded to the master station through the Ethernet interface and RS485 bus communication interface of the ARM subsystem for monitoring .

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. The utility model adopts the Ethernet interface and the RS485 communication interface to realize the remote communication function with the main station, conducts centralized analysis and processing of the information, and intelligently adjusts the operation mode according to the system status; thus, it can remotely use the AC integrated intelligent power supply for the substation The box realizes the operation functions of telemetry, remote signaling, remote control and remote adjustment; realizes the "four remote" functions.

2. The utility model adopts embedded technology, and sets instantaneous and definite overcurrent protection function modules and undervoltage and overvoltage protection function modules through the DSP chip, so that the power box has instantaneous and definite overcurrent protection and Undervoltage and overvoltage protection functions, the protection setting value can be set according to the needs, so that the power box has the function of protection and setting on the basis of realizing remote power supply control, and improves the performance and reliability of the entire system.

Description of drawings

Fig. 1 is a structural block diagram of the utility model system;

Fig. 2 is the schematic diagram of the utility model RS485 bus communication interface circuit.

Detailed ways

In this embodiment, as shown in Figure 1, an integrated intelligent AC power supply box for a substation station is applied in a low-voltage power distribution system including a master station and several integrated intelligent power supply boxes. The power box consists of : DSP subsystem used to realize measurement, protection and output control functions, ARM subsystem used to realize management functions such as communication and keyboard display, and CPLD used for data exchange between DSP subsystem and ARM subsystem;

DSP subsystem includes 32-bit DSP chip TMS320F2812, A/D sampling chip AD7606 and six output control circuits; ARM subsystem includes: 32-bit ARM chip LPC2468, touch screen, Ethernet interface and RS485 bus communication interface; 32-bit DSP chip TMS320F2812 It forms a 32-bit embedded processor structure with 32-bit ARM chip LPC2468; and adopts high-level language programming, which has fast and accurate data collection and analysis and judgment capabilities, supports multiple communication methods, provides friendly human-computer interaction functions, and is flexible and simple to use. In the specific implementation, the touch screen adopts a liquid crystal touch screen with 800×480 pixels and 65K colors to realize the functions of input operation and display, and has a friendly interface.

The DSP subsystem and the ARM subsystem are independent of each other, and failure of one of them will not affect the normal operation of the other. The DSP subsystem and the ARM subsystem are connected to each other, monitor each other, and can detect the failure status of the other party in time and send out a warning signal in time; the 16-bit bus between the DSP chip and the ARM chip is implemented through the CPLD (EPLD analog dual-port 16-bit dual port RAM) data exchange, realize the transmission and sharing of data between each other.

The ARM subsystem uses the ARM chip LPC2468 to control the Ethernet interface and the RS485 bus communication interface to obtain the control commands and various operation commands issued by the master station or control the touch screen to obtain manual control commands and send them to the DSP subsystem. The DSP subsystem passes the CPLD Obtain the control command and use the DSP chip to drive the output control circuit to close or open the corresponding distribution line;

The DSP subsystem uses the DSP chip to control the A/D sampling chip to sample the instantaneous value of each voltage and current in real time and save it as a sampling array. The DSP chip calculates the sampled value, and uses the output The control circuit realizes the action of instantaneous and definite overcurrent protection, undervoltage and overvoltage protection, and records and saves various event information at the same time; the DSP subsystem combines the collected electrical parameters such as voltage and current of each distribution line with The control status is transmitted to the ARM subsystem through the CPLD, and then uploaded to the master station in the central monitoring room for monitoring through the Ethernet interface and the RS485 bus communication interface of the ARM subsystem; Monitor the voltage, current and other electrical parameters of the circuit, monitor the opening and closing status of the circuit breaker and fault information, control the opening and closing status of the power distribution circuit, cooperate with the perfect remote monitoring software of the main station, so as to realize "telemetry", "Four remote" functions of "remote signal", "remote control" and "remote adjustment".

As shown in Figure 2, the MAX3072 chip and HCPL-0600 photoelectric coupling chip are used to expand the RS485 bus interface circuit with photoelectric isolation function; in order to realize the remote communication function between the ARM subsystem and the main station of the central monitoring room. The TXD pin and the RXD pin are the data output and data input pins of the serial port 0 of the ARM chip LPC2468, and the RS485_C pin is the output control pin of the ARM chip LPC2468, which is used to enable the sending or receiving of the MAX3072 chip.

Claims (2)

1. integral intelligent AC power case, is be applied to comprise in the low-voltage distribution system of main website, it is characterized in that described power supply box comprises: DSP subsystem, ARM subsystem and CPLD;

Described DSP subsystem controls for realizing measuring, protect and exporting;

Described ARM subsystem is used for realizing communication and keyboard & display;

Described DSP subsystem carries out exchanges data by described CPLD and described ARM subsystem.

2. integral intelligent AC power case according to claim 1, is characterized in that: described DSP subsystem comprises dsp chip, A/D sampling A/D chip and output control circuit; Described ARM subsystem comprises: ARM chip, touch-screen, Ethernet interface and RS485 bus communication interface;

Described ARM subsystem utilizes Ethernet interface and RS485 bus communication interface described in described ARM chip controls to obtain the control command of described main website transmission or controlling described touch-screen obtains manual control command and send to described DSP subsystem, and described DSP subsystem obtains described control command by described CPLD and utilizes described dsp chip to drive described output control circuit to carry out closed or opening operation to corresponding distribution line;

Described DSP subsystem utilize described dsp chip control described A/D sampling A/D chip real-time sampling each road voltage, the magnitude of current instantaneous value and utilize after carrying out Logic judgment described output control circuit perform protecting control; The electric parameter of gathered each distribution line and state of a control are passed to described ARM subsystem by described CPLD by described DSP subsystem, thus are uploaded to described main website for monitoring by the Ethernet interface of described ARM subsystem and RS485 bus communication interface.