CN201430362Y - Intelligent box-type substation based on GPRS - Google Patents

Abstract

The utility model is an intelligent box-type substation based on GPRS. Install voltage and current transmitters on the secondary side of the voltage transformer on the high and low voltage side of the box transformer and the current transformer. The current and voltage transmitters are connected to the intelligent acquisition unit RTU, and the monitoring switches in the box transformer are also connected Enter the RTU, the control signals of the box change are connected to the main control PLC, the RTU communicates with the main control PLC, the main control PLC is connected to the wireless network through the wireless communication module DTU, the wireless network is connected to the Internet, and the user connects to the Internet through the operation terminal or It is directly connected to the wireless network, and realizes the communication between human and PLC through the Internet or wireless network, so as to realize the monitoring and management of the box transformer. It can realize anti-theft, fire prevention, Web browsing functions, real-time telephone alarm and query functions, so that the intelligent box-type substation can realize completely unattended, safe and stable work. Save a lot of manpower, material resources and financial resources.

Description

Intelligent box-type substation based on GPRS

technical field

The utility model relates to the technical field of substations, in particular to an intelligent box-type substation based on GPRS.

Background technique

With the rapid development of my country's urban modernization and the continuous renewal and transformation of urban distribution networks, high voltage is required to directly enter the load center to form a power supply pattern of high-voltage power receiving-transformer step-down-low-voltage power distribution. The box-type substation is a highly integrated, factory-installed, energy-saving, and land-saving developing equipment, so it is widely used in urban and rural power grids. The development of informatization, networking and intelligent residential quarters requires not only the safety and reliability of the box substation, but also the intelligent functions of "four remotes" (telemetry, remote communication, remote adjustment, and remote control). When completing the ring network power supply of intelligent box-type substations (referred to as intelligent box-type substations), with the cooperation of specific independent software, functions such as automatic positioning of faulty sections, fault removal, load transfer, and network reconstruction can be achieved, so as to ensure recovery in about one minute Power transmission. Among the smart box-type substations already produced in China, the distributed intelligent control system of the box-type substation is composed of intelligent monitoring instruments, smart modules and networks, and the "four remote" functions are realized, but there are deficiencies in many aspects, such as in the box-type substation. When substations are used in relatively remote areas and no one is on duty, many box-type substations often have equipment, cables, and busbars stolen. High, long construction period, and large engineering volume greatly restrict the use and promotion of box-type substations. Among the current intelligent box-type substations, there are "four remote" functions, but it takes a lot of manpower, financial resources, and a huge amount of engineering to set up communication cables, and the anti-theft is not perfect. There are often box-type equipment, line Cables and busbars are stolen, and once these devices are stolen, it will take a relatively long period to restore power supply, which seriously affects the normal production and life of users.

Combined substation (also known as box-type substation or European-style box substation), is a high-voltage and low-voltage switchgear, transformer and casing, microcomputer protection and monitoring equipment, microcomputer high-frequency switching DC power supply equipment, communication equipment, etc. The package is combined in a movable (fixed), heat-insulated, dew-proof, moisture-proof, rain-proof, rust-proof, and a complete set of mobile power transformation and distribution equipment pre-assembled by the factory. It is mainly used to replace the traditional civil substation to realize the functions of power transformation and distribution.

Contents of the invention

The purpose of this utility model is to provide an intelligent box-type substation based on GPRS, using GPRS network as a communication medium, which can save a lot of manpower, material resources, financial resources, reduce user input costs and at the same time can get more stable and safer The product.

The utility model is based on these existing technologies, using the GPRS network (mainly the GPRS network of China Mobile and the CDMA network of China Telecom in China) as the communication medium. Based on the addition of perfect anti-theft, fire prevention, Web browsing functions, real-time telephone alarm, and query functions, the intelligent box-type substation can realize completely unattended, safe and stable work. After perfecting these functions, using GPRS network as a communication medium can save a lot of manpower, material resources, and financial resources, reduce user input costs and at the same time get more stable and safer products. The specific technical solutions are:

Install voltage and current transmitters on the secondary side of the voltage transformer on the high and low voltage side of the box transformer and the current transformer. The current and voltage transmitters are connected to the intelligent acquisition unit RTU, and the monitoring switches in the box transformer are also connected Enter the RTU, the control signals of the box change are connected to the main control PLC, the RTU communicates with the main control PLC, the main control PLC is connected to the wireless network through the wireless communication module DTU, the wireless network is connected to the Internet, and the user connects to the Internet through the operation terminal or It is directly connected to the wireless network, and realizes the communication between people and PLC through the Internet or wireless network, so as to realize the monitoring and management of the box transformer.

Working principle: First, the AC current and voltage signals are converted into 0-5A current and 0-220V voltage by the current and voltage transformer installed on the box transformer, and then the converted voltage and current signals are sent to the voltage and current transmitter , the current signal is converted into 4-20mA through the voltage and current transmitter, and the voltage signal is converted into 0-5V DC voltage and sent to the intelligent data acquisition unit RTU, and at the same time, each monitoring switch (such as transformer temperature, box change door Opening, the working conditions of the fire alarm in the box transformer) are sent to the intelligent acquisition unit RTU, the RTU is connected to the PLC, and the control signals of the box transformer are sent to the main control PLC, and the PLC analyzes the data and various conditions according to the preset program Carry out processing and judgment, manage and control the box substation according to different situations, and at the same time, inform the box substation administrator of the information that needs to be consulted by the administrator or various alarm information instructions through the wireless communication module GPRSDTU to the GPRS network in the form of a short message or a phone call , the administrator can operate and reply to the command through any GPRS network terminal such as computer, mobile phone, etc. The user's reply and operation command enter the GPRSDTU after passing through the GPRS network, and the GPRSDTU will transmit the data back to the PLC. change management and control.

Compared with the prior art, the utility model has the following characteristics:

1. Anti-theft function

Box-type substations are placed outdoors, and some are even placed on remote reservoirs, mountainous areas and highways. At this time, anti-theft is very important. The utility model adds a travel switch in the box-type substation. At this time, as long as the door of the box-type substation is opened at any time, the intelligent control system will get a signal, and at the same time use the GPRS network to send short messages or Call to remind the management personnel of the box-type transformer that the door of the box-type transformer has been opened, please confirm whether it is legal to enter. At this time, when the manager sees the short message, he can make an instruction to call the police or legally enter through the remote control. After the manager gives the instruction to call the police, the box substation will automatically call the local 110 to call the police, and tell the 110 police the location and occurrence of the box substation. If the management personnel give an instruction to enter the box substation legally, the intelligent system will stop the alarm and automatically switch to the next monitoring state.

2. Fire prevention function

During the long-term use of the box-type substation, there will be aging of components, cable aging, short-circuit of the load, or fire caused by loose screws, or fire caused by the surrounding environment. Incalculable losses and major accidents. The utility model adds an automatic fire alarm in the box transformer. When a fire occurs in the box transformer and the surrounding environment, the automatic alarm will quickly transmit the situation to the intelligent control system. The intelligent system can automatically cut off the power supply and immediately pass through the GPRS system. Sending short message alarms to the box substation management personnel and local 119 alarms can minimize losses and eliminate external fire hazards in a timely manner.

3. Web browsing function

By installing and configuring firewall software and using VPN technology, access security is ensured. Support remote real-time screen browsing, historical curve query, historical event query, real-time event query, and remote report display. When the management personnel go out, they can still understand the working conditions of the box transformer through the network. When the box transformer fails, the management personnel can check the cause of the box transformer failure through web browsing, and direct the on-site personnel to isolate the fault the fastest way , restore the power supply of the box transformer. It is also convenient for the manufacturer to analyze the parameters through Web browsing, conduct preliminary investigations, formulate solutions, prepare required materials and tools, and solve after-sales problems for users as quickly as possible when the manufacturer needs after-sales service when the box substation fails. Restore power in time.

4. Real-time telephone alarm query function

As mentioned above, the intelligent system can issue an alarm reminder in case of illegal entry into the box transformer or fire, and at the same time, the intelligent system can also send the information to the On the cell phone of the leader and person in charge of the box substation, problems can be detected early, discharged early, and solved early, and the working status of the box substation can be remotely monitored directly through mobile phones (generally referring to smart phones with large-capacity storage). Monitoring and understanding, you can know the important parameters of the box-type substation and information about accidents and failures thousands of miles away.

After the GPRS network is added to the intelligent system, the technology of the intelligent box-type transformer is more perfect. In addition to the existing "four remote" functions, the newly added functions such as fire protection and anti-theft can better meet the normal work of the box-type transformer under unattended operation. , the box substation work is more stable and safe. After adding the Web browsing function and the real-time telephone alarm query function, the box substation management personnel can understand the working conditions of the box substation in real time, and it is also convenient for the management personnel to monitor the box substation no matter where they are. Control the working conditions of the transformer, and adjust and modify the parameters of the box transformer.

Description of drawings

Fig. 1 is a functional block diagram of the GPRS-based intelligent box-type substation of the present invention.

Detailed ways

As shown in Figure 1, the utility model is to install voltage and current transmitters on the secondary side of the voltage transformer and current transformer on the high and low voltage side of the box transformer, and the current and voltage transmitters are connected to the intelligent acquisition unit RTU. At the same time, each monitoring switch in the box transformer is also connected to the RTU, and the control signals of the box transformer are connected to the main control PLC. The RTU communicates with the main control PLC. The main control PLC is connected to the wireless network through the wireless communication module DTU, and the wireless network access Internet, the user connects to the Internet through the operation terminal or directly connects to the wireless network, and realizes the communication between the person and the PLC through the Internet or wireless network, so as to realize the monitoring and management of the box-type transformer.

Claims (1)

1, a kind of intelligent box-type substation based on GPRS, it is characterized in that uprising the voltage transformer of low-pressure side and the secondary side of current transformer installs the voltage and current transmitter additional at case, electric current and voltage transmitter are connected into intelligent data collecting unit RTU, respectively monitor switching value in case becomes simultaneously and also be connected into RTU, case becomes every control signal and inserts master control PLC, RTU is connected with the master control plc communication, and master control PLC is connected with wireless network by wireless communication module DTU, and wireless network inserts the Internet.

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