CN204089352U - Intelligent platform zone monitor terminal - Google Patents

Abstract

The utility model discloses a kind of Intelligent platform zone monitor terminal, it is made up of main control unit, liquid crystal display and key-press module, AC sampling module, communication interface module, input/output interface module, GPRS module, ethernet interface module, hand-held copy reading module, carrier communication module etc.Main control module is the core of whole device, possess peak, paddy, ordinary telegram energy acquisition and accumulative, clock pair time, the function such as stipulations explanation.Data acquisition comprises quantity of state collection, door node, electric energy meter data acquisition, ac analog collection, direct current analog quantity acquisition and reactive power compensation.Communication interface is responsible for the conversion between interface, comprises RS232 interface circuit, RS485 interface circuit, GPRS radio communication, the direct-connected communication of serial ports, zigbee radio communication and infra red communication port circuit.

Description

Intelligent station area monitoring terminal

technical field

The utility model relates to a monitoring terminal for an intelligent station area of a rural network, which belongs to the technical transformation field of the rural network.

Background technique

Currently, there are various configurations in rural power distribution stations. Due to the existence of multiple systems, management, control and maintenance tasks are aggravated. However, each system is isolated from each other, which leads to the inability to effectively share information, and the operating personnel cannot know the real-time operation status of the site in a timely manner. They must go to the site to read the master meter, set the leakage switch, switch the switch, etc., and use manual statistical reports. . The function is single, there is no unified monitoring device, and there is a lack of effective monitoring and comprehensive management of power quality problems such as reactive power compensation in distribution stations. Therefore, in order to make the distribution station meet the requirements of informatization, automation and comprehensive management, it is necessary to build an intelligent distribution station integrating multiple functions.

On January 20, 2010, the project kick-off meeting of State Grid Corporation of China's "Rural Smart Distribution Network Pilot Project Supporting Key Technology Application Research" was held in Beijing. The project closely revolves around the smart grid development goals of the State Grid Corporation of China, based on the current situation of the rural distribution network and the development needs of the smart distribution network, solves key technical problems in the construction of the rural smart distribution network, provides corresponding technical solutions and supporting software and hardware, and relies on technology The research results, the construction of rural smart distribution network pilot projects, provide theoretical, technical and practical basis for the construction of rural smart distribution network.

In April 2011, the State Grid Corporation of China officially launched relevant standards: Q/GDW 615-2011 "Rural Power Grid Intelligent Distribution Transformer Terminal Specifications and Technical Conditions" and Q/GDW 614-2011 "Rural Power Grid Intelligent Low-Voltage Distribution Box Functional Specifications and Technical conditions".

Contents of the invention

In order to design the terminal as a new type of intelligent monitoring terminal integrating distribution transformer monitoring terminal, reactive power compensation controller, meter reading concentrator and power quality monitor, the following unit modules need to be realized:

1. AC telemetry module: It first transforms the AC 220V/110V/5A/1A signal into a small signal suitable for the AD chip through PT/CT, then the AD chip samples and holds these small signals, and finally converts them into digital signals and outputs them to CPU;

2. Enter the remote signaling module: collect the on-site state quantity, and use photoelectric isolation to isolate the signals inside and outside the terminal;

3. Open the remote control module: control the DC24V relay coil, output from the relay contact, and control the on-site protection switch;

4. Reactive power switching module: control DC12V optocoupler, control capacitor switching switch.

5. Communication module: Send the data sent by the CPU according to different interfaces, such as RS485, and also receive the data sent to the terminal by external devices;

6. CPU main control module; including CPU loop, storage loop and related interface loop, to realize telemetry, remote signaling, remote control, storage, communication and other tasks.

The technical scheme of the present invention to realize the sampling of the above-mentioned purpose is: an intelligent station area monitoring terminal, characterized in that: it consists of a main control unit, a liquid crystal display and a key module, an AC sampling module, a communication interface module, an input and output interface module, and a GPRS module , Ethernet interface module, hand-held reading module, carrier communication module;

The main control unit is the core of the whole device, which performs peak, valley, and flat energy collection and accumulation, clock time synchronization, and protocol interpretation;

The AC sampling module is responsible for state quantity acquisition, gate node, electric energy meter data acquisition, AC analog quantity acquisition, DC analog quantity acquisition and reactive power compensation;

The communication interface module is responsible for conversion between interfaces, including RS232 interface circuit, RS485 interface circuit, GPRS wireless communication, serial port direct connection communication, zigbee wireless communication and infrared communication interface circuit;

The liquid crystal display and button module, AC sampling module, communication interface module, input and output interface module, GPRS module, Ethernet interface module, hand-held reading module, and carrier communication module are respectively connected to the main control unit.

Beneficial effects: the terminal has the interface capability with the low-voltage protection switch and the reactive power compensation switch; it has rich communication networking capabilities, not only Ethernet, GPRS wireless remote networking means, but also zigbee, power carrier, and RS485 communication station areas. Ground networking capability; the terminal has the traditional power "three remote" capabilities in the power industry, namely: telemetry, remote signaling, and remote control.

Description of drawings

The utility model is described in detail below in conjunction with accompanying drawing and specific embodiment;

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

Figure 2 is a schematic diagram of the AC telemetry module;

Figure 3 is a schematic diagram of the input remote signaling module;

Figure 4 is a schematic diagram of the remote control module;

Figure 5 is a schematic diagram of the communication module.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural block diagram of the utility model, and Fig. 2-5 are respectively an AC telemetry module, an input remote signaling module, an output remote control module, and a communication module. The intelligent station area monitoring terminal of this embodiment, the terminal is the control center of the distribution station area, it is responsible for the communication between the intelligent distribution station area and the main station, intelligent control and protection switch, and collects, calculates and stores the distribution station area All kinds of data of the transformer, control the switching of "intelligent control and protection switch" and reactive power compensation capacitor, it is a set of distribution transformer monitoring terminal, reactive power compensation controller, meter reading concentrator and power quality monitor The new intelligent monitoring terminal. The terminal hardware is mainly composed of main control unit, liquid crystal display and button module, AC sampling module, communication interface module, input and output interface module, GPRS module, Ethernet interface module, hand-held reading module, carrier communication module, etc. The main control module is the core of the whole device, which has functions such as peak, valley, and flat energy collection and accumulation, clock synchronization, and protocol interpretation. Data acquisition includes state quantity acquisition, gate node, energy meter data acquisition, AC analog acquisition, DC analog acquisition and reactive power compensation. The communication interface is responsible for the conversion between interfaces, including RS232 interface circuit, RS485 interface circuit, GPRS wireless communication, serial port direct connection communication, zigbee wireless communication and infrared communication interface circuit.

The terminal CPU adopts the cost-effective M3 chip, and the external support storage circuit includes SDRAM, NOR FLASH, NAND FLASH, etc.; the AD7606 chip is used to complete the AC sampling function to realize the sampling of voltage and current; the optocoupler input is used to couple the external switch signal To the bus buffer, so as to realize the remote signaling function; use the output buffer, and then realize the remote control function through the relay output; calculate the sampled U, I, P, Q, cos∮ through the CPU, and then judge whether the capacitor is switched, and use a 12V optocoupler Switching and switching interface, so as to realize the reactive power compensation function; finally, make full use of the communication resources of the CPU, and make the interface into RS485, Ethernet and other communication interfaces according to the standard, so as to realize the terminal communication networking function.

Although the preferred examples of the present invention have been disclosed above, they are not intended to limit the present invention. Any skilled person can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be defined by the scope of protection of the claims of the present application.

Claims (10)

1. A monitoring terminal for an intelligent station area, characterized in that: it consists of a main control unit, a liquid crystal display and a button module, an AC sampling module, a communication interface module, an input/output interface module, a GPRS module, an Ethernet interface module, a hand-held reading module, carrier communication module; The main control unit is the core of the whole device, which performs peak, valley, and flat energy collection and accumulation, clock time synchronization, and protocol interpretation; The AC sampling module is responsible for state quantity acquisition, gate node, electric energy meter data acquisition, AC analog quantity acquisition, DC analog quantity acquisition and reactive power compensation; The communication interface module is responsible for conversion between interfaces, including RS232 interface circuit, RS485 interface circuit, GPRS wireless communication, serial port direct connection communication, zigbee wireless communication and infrared communication interface circuit; The liquid crystal display and button module, AC sampling module, communication interface module, input and output interface module, GPRS module, Ethernet interface module, hand-held reading module, and carrier communication module are respectively connected to the main control unit. 2. The intelligent station area monitoring terminal according to claim 1, characterized in that: the terminal has an interface capability with a low-voltage protection switch. 3. The intelligent zone monitoring terminal according to claim 1, characterized in that: the terminal has an interface capability with a reactive power compensation switch. 4. The intelligent station area monitoring terminal according to claim 1, characterized in that: the terminal has the ability to analyze and judge reactive power compensation. 5. The intelligent station area monitoring terminal according to claim 3 or 4, characterized in that: the CPU calculates the sampled U, I, P, Q, cos∮, and then judges whether the capacitance is switched, and the 12V optocoupler is used for switching And switching switch interface, so as to realize reactive power compensation. 6. The intelligent station area monitoring terminal according to claim 1, characterized in that: the terminal has rich communication networking capabilities, both Ethernet, GPRS wireless remote networking means, and zigbee, power carrier, RS485 communication station local networking capabilities. 7. The intelligent zone monitoring terminal according to claim 1, characterized in that: the communication resources of the CPU are utilized, and the interface is made into RS485 and Ethernet communication interfaces according to the standard, so as to realize terminal communication networking. 8. The intelligent station area monitoring terminal according to claim 1, characterized in that the terminal has the capabilities of telemetry, remote signaling and remote control. 9. The intelligent station area monitoring terminal according to claim 8, characterized in that: the optocoupler input is used to couple the external switch signal to the bus buffer, thereby realizing the remote signaling function; the output buffer is adopted, and then the relay output is used to realize remote control function. 10. The intelligent platform monitoring terminal according to claim 1, characterized in that: the main control unit adopts a cost-effective M3 chip, and the external support storage circuit includes SDRAM, NOR FLASH, and NAND FLASH; the AC sampling The module uses the AD7606 chip to complete the AC sampling to realize the sampling of the voltage and current.