CN202815558U - Intelligent measurement and control device for switch cabinets - Google Patents

Abstract

The utility model discloses an intelligent measurement and control device for a switchgear, which comprises a temperature and humidity acquisition module, a switching value acquisition module and a high-voltage signal acquisition module. The photoelectric isolation module is connected to the microprocessor; the microprocessor is respectively connected to the voice error prevention prompt module, the state indication module and the output control module. The device adopts a high-performance microprocessor and an integrated high-precision temperature and humidity acquisition module. The new modular layout makes the device integrate high reliability, stability, anti-interference and many other advantages. The product has powerful functions and is suitable for use in 3-35KV indoor switch cabinets, central cabinets, handcart cabinets, fixed cabinets, ring network cabinets and other switch cabinets. It is easy to install and has a long service life, which can fully meet the needs of the power industry and ensure the safe and reliable operation of electrical appliances.

Description

A switch cabinet intelligent measurement and control device

technical field

The utility model relates to various switchgear equipment such as 3-35KV indoor switchgear in a power system, a central cabinet, a handcart cabinet, a fixed cabinet, and a ring network cabinet, in particular to an intelligent measurement and control device for a switchgear.

Background technique

At present, with the rapid development of my country's power transmission and distribution industry in the direction of digitization, intelligence, integration, and networking, many new and higher requirements have been put forward for the operation and control of power switchgear. At present, the intelligent control devices of switch cabinets used in the market have the following disadvantages:

1) It is designed with a common single-chip microcomputer, and there are many peripheral devices, and the reliability and safety are low.

2) The devices are installed and used independently, resulting in overlapping system functions, complex wiring, and high cost.

3) The automatic entry and exit of the handcart is prone to stalling, and the adjustment effect is difficult to meet the site requirements.

Utility model content

Aiming at the problems and deficiencies in the prior art, the purpose of this utility model is to provide an intelligent measurement and control device for switchgear, which makes the device integrate high reliability, stability, anti-interference and many other advantages through a new modular layout. advantage. The product is powerful, easy to install, and has a long service life, which can fully meet the needs of the power industry and ensure the safe and reliable operation of electrical appliances.

The purpose of this utility model is achieved through the following technical solutions:

An intelligent measurement and control device for a switchgear, comprising a temperature and humidity acquisition module, a switching value acquisition module and a high-voltage signal acquisition module, the temperature and humidity acquisition module, a switch value acquisition module and a high-voltage signal acquisition module are respectively connected to a photoelectric isolation module, and the photoelectric isolation module It is connected with the microprocessor; the microprocessor is respectively connected with the voice error prevention prompt module, the state indication module and the output control module.

The microprocessor is respectively connected with a digital display screen and an Rs485 communication interface.

The utility model has the following characteristics:

The device is intelligently controlled by a high-end microprocessor (single chip microcomputer), which can judge and display the opening and closing status of the switch and the position of the switch handcart, and can give voice warning prompts for misoperation. It can also collect and display the temperature and humidity in the cabinet in real time, and automatically adjust the temperature and humidity environment in the cabinet according to user settings. This product can also prompt the user whether the high voltage is live or not, and implement the working state of the electromagnetic lock according to the situation. The RS485 communication interface of this product can make the device and other equipment such as substations form a real display microcomputer error prevention monitoring system.

This device is a change from the past where each switchgear needs to be equipped with multiple products from different manufacturers, which not only reduces the amount of engineering and saves costs, but also improves the reliability of the system. The switchgear intelligent measurement and control device that has been put into trial ensures the measurement, control and protection of the primary equipment in the switchgear with its good stability and reliability.

The high-speed microcontroller utilized by the device designs an intelligent control device. On the basis of no additional cost, the system performance has been greatly improved, the functions have been expanded, and the shortcomings of previous similar products have been effectively made up for. Requirements for the function of the control device The switch cabinet is a high-voltage complete power distribution device that assembles the primary and secondary equipment in the cabinet according to the power distribution wiring scheme for different purposes.

In order to meet the power distribution requirements, the control device needs to complete the following functions according to the switch cabinet wiring scheme:

a) Real-time display of circuit breaker, handcart and grounding switch position and interlock status according to working conditions;

b) High-voltage live display, lockout, voice anti-mistake warning prompts, etc.;

c) Digital display and control of temperature and humidity;

d) The in and out control of the handcart of the circuit breaker is accurate and stable;

e) Capable of opening and closing the circuit breaker, opening and closing the grounding switch, emergency opening, unlocking and lighting inside the cabinet.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

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

Detailed ways

The device of the present utility model, as shown in Figure 1, is an intelligent measurement and control device for a switchgear, comprising a temperature and humidity acquisition module, a switching value acquisition module and a high-voltage signal acquisition module, a temperature and humidity acquisition module, a switch value acquisition module and a high-voltage signal acquisition module They are respectively connected with the photoelectric isolation module, and the photoelectric isolation module is connected with the microprocessor; the microprocessor is respectively connected with the voice error prevention prompt module, the state indication module and the output control module.

In the device, the microprocessor is also respectively connected with a digital display screen and an Rs485 communication interface.

The device will collect the collected temperature and humidity signals, switch signals, high-voltage live signals, etc., through the photoelectric isolation module to isolate the signals, and then send them to the microprocessor (CPU) for centralized processing after compensation and amplification and AD conversion, and then the microprocessor will output to the digital The display screen displays the current temperature and humidity value, the voice prompt module provides an anti-mistake prompt, and the status indication module outputs the status indication and the output control module controls the output.

The switchgear intelligent measurement and control device is functionally composed of switch input state display part, temperature and humidity acquisition control part, high voltage live display and lock control part, Rs485 communication part, voice anti-misoperation prompt part and other functions.

The first part: the state indication circuit, the signal collected through the switch input is sent to the microprocessor after photoelectric isolation, and the microprocessor controls the indication to realize the dynamic display of the plane indicator light on the schematic panel, and the wrong switch value In addition to providing instructions, it will also prompt through voice circuits to prevent misoperation by staff.

The second part: the temperature and humidity control of the environment in the cabinet. The signal is collected by connecting the temperature and humidity sensor. The signal is amplified and high-precision AD converted and then sent to the microprocessor for processing. The current temperature and humidity value collected in real time will be displayed through the LED digital tube. At the same time By comparing with the temperature and humidity setting value set by the system, it is judged whether to perform heating dehumidification or cooling dehumidification. To control the temperature and humidity of the small environment in the cabinet.

The third part: high-voltage live display and locking control. Under the action of high-voltage alternating electric field, the high-voltage live sensor generates an alternating current signal, and transmits the induced current signal to the high-voltage signal acquisition and processing module inside the device through the cable. After the signal is processed by filtering, overvoltage protection, step-down conversion, etc., the electrical signal is transformed by photoelectric isolation and then compensated and amplified by the control circuit for microprocessing, and finally output display signals and lockouts. And there are high-voltage three-phase live voice warning prompts to ensure the personal safety of operators.

The fourth part: The Rs485 communication part of the device is a standard Modbus communication protocol, which can monitor and transmit a series of parameters such as switch display status, ambient temperature and humidity value, heating alarm, etc. to the background in real time, which can be remotely monitored and controlled by users.

The above content is a further detailed description of the utility model in conjunction with specific preferred embodiments. It cannot be determined that the specific embodiment of the utility model is limited to this. Under the premise of the new concept, some simple deduction or replacement can also be made, which should be regarded as belonging to the utility model and the patent protection scope is determined by the submitted claims.

Claims (2)

1. Intelligent switch cabinet measure and control device, it is characterized in that: comprise humiture collection module, switching value acquisition module and high-voltage signal acquisition module, described humiture collection module, switching value acquisition module and high-voltage signal acquisition module link to each other with photoelectric isolation module respectively, and photoelectric isolation module links to each other with microprocessor; Described microprocessor connects respectively voice anti-fault reminding module, state indicating module and output control module.

2. a kind of Intelligent switch cabinet measure and control device according to claim 1, it is characterized in that: described microprocessor is connected with respectively digital display screen and Rs485 communication interface.

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