Centralized control system inside outdoor terminal box of transformer substation

Abstract

The invention discloses an internal centralized control system for outdoor terminal boxes of a transformer substation, which comprises a temperature and humidity monitoring unit, a condensation monitoring unit, a sub-control unit, a front-end wireless transceiving unit and a temperature and humidity adjusting unit which are respectively arranged in a plurality of terminal boxes in the transformer substation, and a terminal wireless transceiving unit and a centralized control unit which are arranged at a terminal, the sub-control unit is connected with the centralized control unit through the front-end wireless transceiving unit and the terminal wireless transceiving unit; according to the terminal box, the internal temperature and humidity and the condensation condition of the terminal box are monitored in real time, a moisture-proof dehumidification strategy is determined according to the internal temperature and humidity condition of the box body, the temperature and humidity in the terminal box are regulated and controlled, condensation is avoided, monitoring data are processed, uploaded, processed and displayed in a centralized mode, and operation and maintenance personnel can conveniently and timely master the environment state in the terminal box.

Description

Technical Field

[0001] The invention belongs to the technical field of outdoor terminal boxes of substations, and in particular relates to an internal centralized control system of an outdoor terminal box of a substation. Background Art

[0002] The substation terminal box is the intermediate link between outdoor electrical equipment and indoor measurement, control, protection, communication and other equipment. It is used to obtain relevant quantities in the connection circuit between primary and secondary equipment. It is an important part of the substation. Its operating status directly affects the safe operation and stability and reliability of the entire substation.

[0003] Since the terminal box is generally set up outdoors, it is often exposed to wind, sun and rain, which can easily cause rust, water ingress, condensation and other conditions in the terminal box. If the terminal box is damp, it can easily lead to poor contact of the secondary terminals, causing the insulation resistance of the DC secondary circuit to the ground to decrease, and easily causing the DC positive power supply or negative power supply to be grounded, which in turn causes the DC fuse to blow, and the relay protection to refuse to operate or malfunction. It can also cause the measurement and control and protection devices to operate abnormally and send signals incorrectly, causing the operation and maintenance personnel to misjudge or make incorrect analysis and processing.

[0004] Therefore, it is very important to monitor and control the temperature and humidity inside the substation terminal box in real time. In the existing technology, a heating plate and a fan are generally installed inside the terminal box to achieve the function of moisture-proof and anti-condensation inside the terminal box. Due to the different ambient temperatures in the four seasons, in order to ensure that the temperature and humidity inside the terminal box are within a reasonable range and avoid excessive temperature affecting the normal operation of the terminal box, simple heating, heating and dehumidification measures cannot meet the needs of internal environmental control of the terminal box.

[0005] At the same time, when the temperature of the hot and humid air in the terminal box is equal to or lower than its dew point temperature, condensation is likely to occur on the inner wall surface of the box. The monitoring method in the prior art cannot monitor condensation very well. The higher the relative humidity of the air, the higher the dew point temperature, and the more likely condensation will occur. Increasing the temperature can only reduce the relative humidity, and cannot solve the condensation problem very well.

[0006] Therefore, in order to solve the above problems, it is necessary to develop an internal centralized control system for the outdoor terminal box of a substation. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide an internal centralized control system for the outdoor terminal box of a substation, which monitors the temperature, humidity and condensation conditions inside the terminal box in real time, and determines a moisture-proof and dehumidification strategy based on the temperature and humidity conditions inside the box, thereby achieving temperature and humidity control in the terminal box to avoid condensation, and processing and uploading the monitoring data for centralized processing and display, so that operation and maintenance personnel can promptly grasp the environmental status inside the terminal box.

[0008] The object of the present invention is achieved as follows: A centralized control system for an outdoor terminal box in a substation, comprising a temperature and humidity monitoring unit, a condensation monitoring unit, a sub-control unit, a front-end wireless transceiver unit and a temperature and humidity adjustment unit respectively arranged in a plurality of terminal boxes in the substation, and a terminal wireless transceiver unit and a centralized control unit arranged in a terminal, wherein the sub-control unit is connected to the centralized control unit via the front-end wireless transceiver unit and the terminal wireless transceiver unit; Among them, the temperature and humidity monitoring unit is used to monitor the ambient temperature and humidity inside the terminal box in real time, and transmit the monitored data to the sub-control unit for analysis and processing; the condensation monitoring unit is used to monitor whether condensation is generated in the terminal box, and transmit the monitored signal to the sub-control unit for analysis and processing; the sub-control unit analyzes and processes the received data and signals, and transmits the data to the terminal through the front-end wireless transceiver unit. At the same time, the sub-control unit determines the current state of the terminal box based on the monitoring data and monitoring signals, or receives terminal instructions, and makes a current strategy for moisture-proof and dehumidification inside the terminal box, and controls the temperature and humidity adjustment unit according to the current strategy, and realizes moisture-proof and dehumidification inside the terminal box through the temperature and humidity adjustment unit; the terminal wireless transceiver unit receives the data transmitted by the front-end wireless transceiver unit, and transmits it to the centralized control unit for aggregation, processing and display.

[0009] Furthermore, the temperature and humidity monitoring unit includes a temperature and humidity sensor module arranged inside the terminal box.

[0010] Furthermore, the condensation monitoring unit includes a water drop sensor module, a protective device and a guide plate arranged inside the terminal box.

[0011] Furthermore, the protective device includes a accommodating groove body for accommodating the water drop sensor module, a dust baffle is fixedly provided on one side of the top of the accommodating groove body, and a guide plate extending upward and outward is fixedly provided on the other side of the top of the accommodating groove body, and the outer side surface of the top of the guide plate is tightly abutted against the mounting surface. The protective device is detachably fixed and installed in a condensation-prone place inside the terminal box by a bolt assembly, and a guide port for condensation water droplets to enter the inside of the accommodating groove body is formed between the bottom end of the guide plate and the dust baffle.

[0012] Furthermore, the sensing panel of the water drop sensor module is horizontally fixedly disposed inside the accommodating tank body and is arranged corresponding to the guide port.

[0013] Furthermore, the temperature and humidity adjustment unit includes a heating device and a dehumidifier which are respectively arranged inside a single terminal box.

[0014] Furthermore, the sub-control unit adopts PID control to control the temperature and humidity adjustment unit, wherein the proportional control part of the PID control is used to control the response speed of heating, the integral control part is used to eliminate the deviation between the actual measured values ​​of temperature and humidity and the program set values, and the differential control part is used to improve the stability and dynamics of the system.

[0015] Furthermore, the front-end wireless transceiver module and the terminal wireless transceiver module use a 433MHz wireless transceiver module to implement a one-to-many communication mode.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are: in this application, (1) By respectively arranging temperature and humidity detection units and condensation monitoring units inside multiple terminal boxes, real-time monitoring of temperature, humidity and condensation conditions inside the terminal boxes can be achieved; (2) The condensation condition inside the terminal box is monitored by using a water drop sensor module. At the same time, a protective device and a guide plate are provided on its external cover, so that the water droplets gathered on the box wall and other places can gather on the sensing panel of the water drop sensor module, effectively improving the reliability of the water drop sensor module in monitoring the condensation condition. At the same time, the provision of a accommodating groove body and a dust baffle of the protective device can effectively prevent dust from gathering on the sensing panel, thereby preventing the sensing effect of the sensing panel from being affected, effectively improving the monitoring accuracy and extending the service life; (3) By setting up a sub-control unit and a temperature and humidity adjustment unit, the received monitoring data and terminal instructions are analyzed, and the moisture-proof and dehumidification strategy is set, the temperature and humidity adjustment unit is started, and heating and dehumidification or heating or dehumidification are selected to effectively improve the moisture-proof and dehumidification effect; (4) By setting up multiple front-end wireless transceiver units and terminal wireless transceiver units, the monitoring data in multiple terminal boxes can be centrally and uniformly transmitted, which is convenient for operation and maintenance personnel to view and timely grasp the environmental status of each terminal box, facilitate regulation and issuance of instructions, and effectively improve the safety and reliability of substation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a principle block diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the installation structure of the condensation monitoring unit in the present invention.

[0019] In the figure: 0, mounting surface 1, water drop sensor module 2, protective device 3, guide plate; 1a, sensor panel; 2a, accommodating tank 2b, dust baffle 2c, bolt assembly 2d, guide port. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0021] like Figure 1 , Figure 2 As shown, a centralized control system for an outdoor terminal box of a substation includes a temperature and humidity monitoring unit, a condensation monitoring unit, a sub-control unit, a front-end wireless transceiver unit and a temperature and humidity adjustment unit respectively arranged in multiple terminal boxes in the substation, and a terminal wireless transceiver unit and a centralized control unit arranged at the terminal, wherein the sub-control unit is connected to the centralized control unit via the front-end wireless transceiver unit and the terminal wireless transceiver unit.

[0022] Among them, the temperature and humidity monitoring unit is used to monitor the ambient temperature and humidity inside the terminal box in real time, and transmit the monitored data to the sub-control unit for analysis and processing; preferably, the temperature and humidity monitoring unit includes a temperature and humidity sensor module arranged inside the terminal box.

[0023] The condensation monitoring unit is used to monitor whether condensation is generated in the terminal box, and transmit the monitored signal to the sub-control unit for analysis and processing; preferably, the condensation monitoring unit includes a water drop sensor module 1, a protective device 2 and a guide plate 3 arranged inside the terminal box; the protective device 2 includes a accommodating tank body 2a for accommodating the water drop sensor module 1, a dust baffle 2b is fixedly arranged on one side of the top of the accommodating tank body 2a, and a guide plate 3 extending upward and outward is fixedly arranged on the other side of the top of the accommodating tank body 2a, and the outer side surface of the top of the guide plate 3 is tightly abutted and connected with the mounting surface 0, and the protective device 2 is detachably fixed and installed at a condensation-prone place inside the terminal box by a bolt assembly 2c. A guide port 2d is formed between the bottom end of the guide plate 3 and the dust baffle 2b for condensed water droplets to enter the interior of the accommodating tank body 2a; the sensing panel 1a of the water drop sensor module 1 is horizontally fixedly arranged inside the accommodating tank body 2a, and is arranged corresponding to the guide port 2d; the setting of the guide plate 3 can enable the water droplets gathered on the box wall and the like to gather on the sensing panel 1a of the water drop sensor module 1, effectively improving the reliability of the water drop sensor module 1 in monitoring the condensation condition; the setting of the protective device 2 can realize the protection of the sensing panel 1a of the water drop sensor module 1, avoid dust from gathering on the sensing panel 1a, avoid affecting the sensing effect of the sensing panel 1a, effectively improve the accuracy of monitoring, and extend the service life.

[0024] Among them, the sub-control unit analyzes and processes the received data and signals, and transmits the data to the terminal through the front-end wireless transceiver unit. At the same time, the sub-control unit determines the current state of the terminal box based on the monitoring data and monitoring signals, or receives terminal instructions, and makes a current strategy for moisture-proof and dehumidification inside the terminal box, and controls the temperature and humidity adjustment unit according to the current strategy, and realizes moisture-proof and dehumidification inside the terminal box through the temperature and humidity adjustment unit; preferably, the temperature and humidity adjustment unit includes a heating device and a dehumidifier respectively arranged in a single terminal box; preferably, the temperature and humidity adjustment unit in the sub-control unit is controlled by PID control, wherein the proportional control part of the PID control is used to control the response speed of heating, the integral control part is used to eliminate the deviation between the actual measured values ​​of temperature and humidity and the program set values, and the differential control part is used to improve the stability and dynamics of the system.

[0025] Among them, the terminal wireless transceiver unit receives the data transmitted by the front-end wireless transceiver unit, and transmits it to the centralized control unit for aggregation, processing and display; preferably, the front-end wireless transceiver module and the terminal wireless transceiver module use a 433MHz wireless transceiver module to realize a one-to-many communication mode.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific implementation modes of the present invention can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A centralized control system for an outdoor terminal box of a substation, characterized by: It includes a temperature and humidity monitoring unit, a condensation monitoring unit, a sub-control unit, a front-end wireless transceiver unit and a temperature and humidity adjustment unit respectively arranged in a plurality of terminal boxes in a substation, and a terminal wireless transceiver unit and a central control unit arranged in a terminal, wherein the sub-control unit is connected to the central control unit via the front-end wireless transceiver unit and the terminal wireless transceiver unit; Among them, the temperature and humidity monitoring unit is used to monitor the ambient temperature and humidity inside the terminal box in real time, and transmit the monitored data to the sub-control unit for analysis and processing; the condensation monitoring unit is used to monitor whether condensation is generated in the terminal box, and transmit the monitored signal to the sub-control unit for analysis and processing; the sub-control unit analyzes and processes the received data and signals, and transmits the data to the terminal through the front-end wireless transceiver unit. At the same time, the sub-control unit determines the current state of the terminal box based on the monitoring data and monitoring signals, or receives terminal instructions, and makes a current strategy for moisture-proof and dehumidification inside the terminal box, and controls the temperature and humidity adjustment unit according to the current strategy, and realizes moisture-proof and dehumidification inside the terminal box through the temperature and humidity adjustment unit; the terminal wireless transceiver unit receives the data transmitted by the front-end wireless transceiver unit, and transmits it to the centralized control unit for aggregation, processing and display.

2. According to claim 1, a substation outdoor terminal box internal centralized control system is characterized by: The temperature and humidity monitoring unit includes a temperature and humidity sensor module arranged inside the terminal box.

3. According to claim 1, a substation outdoor terminal box internal centralized control system is characterized by: The condensation monitoring unit includes a water drop sensor module, a protective device and a guide plate arranged inside the terminal box.

4. The internal centralized control system of the outdoor terminal box of a substation according to claim 3, characterized in that: The protective device includes a accommodating groove body for accommodating the water drop sensor module, a dust baffle is fixedly provided on one side of the top of the accommodating groove body, and a guide plate extending upward and outward is fixedly provided on the other side of the top of the accommodating groove body, and the outer side surface of the top of the guide plate is tightly abutted against the mounting surface. The protective device is detachably fixed and installed at a condensation-prone place inside the terminal box by a bolt assembly, and a guide port for condensation water droplets to enter the inside of the accommodating groove body is formed between the bottom end of the guide plate and the dust baffle.

5. The internal centralized control system of the outdoor terminal box of a substation according to claim 4, characterized in that: The sensing panel of the water drop sensor module is horizontally fixedly arranged inside the accommodating tank body and is arranged corresponding to the guide port.

6. The internal centralized control system of the outdoor terminal box of a substation according to claim 1, characterized in that: The temperature and humidity adjustment unit includes a heating device and a dehumidifier which are respectively arranged inside a single terminal box.

7. The internal centralized control system of the outdoor terminal box of a substation according to claim 1, characterized in that: The sub-control unit adopts PID control to control the temperature and humidity adjustment unit, wherein the proportional control part of the PID control is used to control the response speed of heating, the integral control part is used to eliminate the deviation between the actual temperature and humidity values ​​and the program set values, and the differential control part is used to improve the stability and dynamics of the system.

8. The internal centralized control system of the outdoor terminal box of a substation according to claim 1, characterized in that: The front-end wireless transceiver module and the terminal wireless transceiver module use a 433MHz wireless transceiver module to realize a one-to-many communication mode.

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