An automatic control system for temperature and humidity in power distribution rooms to ensure the safety of switch cabinets

Abstract

The present invention discloses a temperature and humidity automatic control system for a power distribution room for ensuring the safety of a switch cabinet in the technical field of switch cabinet temperature and humidity control systems, comprising a switch cabinet, a temperature and humidity current measuring module, a remote communication module, a temperature and humidity monitoring server, a data receiving and sending module, a switch cabinet temperature and humidity determination module, a bus duct and a control module, wherein the temperature and humidity current measuring module, the remote communication module and the control module are all installed inside the switch cabinet, the data receiving and sending module and the switch cabinet temperature and humidity determination module are all installed inside the temperature and humidity monitoring server, the temperature and humidity control system comprises a communication module and a temperature and humidity control center, and can set different rated currents according to different current temperature rise requirements for different bus duct connection copper busbar types and materials, thereby maximizing the current carrying capacity of the bus duct connection copper busbar without causing loss of the bus duct connection copper busbar and ultimately leading to the occurrence of a dangerous situation.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinet temperature and humidity control systems, and in particular to a power distribution room temperature and humidity automatic control system that ensures the safety of the switch cabinet. Background Art

[0002] With the rapid development of intelligent buildings and intelligent monitoring, the distribution room as a power supply control center has become an indispensable part of modern buildings, and the scale is getting larger and larger, so the power supply demand of the distribution room itself is also getting higher and higher. In fact, in order to reduce costs and standardize installation, more and more distribution rooms use bus ducts to connect copper bars to switch cabinets for power supply. Due to the high current, high requirements are placed on the temperature and humidity of the switch cabinet to ensure the safety and appropriate service life of the switch cabinet.

[0003] The temperature and humidity of the switch cabinet are usually very different from the ambient temperature and humidity. On the one hand, the current passing through the switch cabinet varies, which will affect the temperature and humidity. On the other hand, the switch cabinet is usually far away from the temperature and humidity controller in the distribution room, such as the air conditioner. Therefore, the switch cabinet needs its own separate temperature, humidity and current measurement for control and adjustment.

[0004] The bus duct copper bar has a certain rated current, but different temperatures correspond to different rated currents. The bus duct copper bar must not exceed the rated current specified under the temperature conditions at the time of operation. Generally speaking, the higher the temperature, the lower the rated current allowed for the bus duct copper bar.

[0005] The existing bus duct, which serves as the power supply part of the switch cabinet, has a temperature and current detection system for the copper busbar. The system either sets an absolute current and alarms when the current exceeds the absolute current; or sets an absolute temperature and alarms when the temperature exceeds the absolute temperature. This places certain restrictions on the current carrying capacity of the copper busbar connected to the bus duct, which can easily cause the loss of the copper busbar connected to the bus duct and eventually lead to dangerous situations.

[0006] Based on this, the present invention designs an automatic temperature and humidity control system for a power distribution room that ensures the safety of a switch cabinet to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide an automatic temperature and humidity control system for a power distribution room that ensures the safety of a switch cabinet, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a temperature and humidity automatic control system for a power distribution room that ensures the safety of a switch cabinet, comprising a switch cabinet, a temperature and humidity current measurement module, a remote communication module, a temperature and humidity monitoring server, a data receiving and sending module, a switch cabinet temperature and humidity determination module, a bus duct and a control module, the temperature and humidity current measurement module, the remote communication module and the control module are all installed inside the switch cabinet, the data receiving and sending module and the switch cabinet temperature and humidity determination module are all installed inside the temperature and humidity monitoring server, the temperature and humidity control system comprises a communication module and a temperature and humidity control center, the temperature and humidity current measurement module is used to collect and obtain the temperature, humidity and current data of the copper bus conductor inside the switch cabinet and the bus duct interface part, the control module is used to determine whether the absolute current or temperature and humidity data exceeds the locally set absolute threshold value 1, the remote temperature and humidity monitoring server is used to receive the temperature, humidity and current data periodically sent by the switch cabinet through the remote communication module, the switch cabinet temperature and humidity determination module in the remote temperature and humidity monitoring server analyzes and determines whether the temperature, humidity and current cross the threshold value 2 obtained by querying the server according to the performance parameters of the copper bus conductor inside the corresponding switch cabinet and the bus duct interface part, and the data receiving and sending module is used to send instructions to the temperature and humidity control system in the power distribution room.

[0009] Preferably, the temperature, humidity and current measurement module is divided into a temperature and humidity sensor acquisition submodule and a current transformer acquisition submodule.

[0010] Preferably, the temperature and humidity sensor acquisition submodule is located between the switch cabinet and the bus duct connecting copper bar power supply interface, which are respectively the bus duct access end and the switch cabinet entrance. The bus duct access end and the switch cabinet entrance are both three-phase four-wire A, B, C, N and are arranged in the same order. The bus duct access end and the switch cabinet entrance are plugged together through the bus duct connecting copper bar to provide electrical connection. The bus duct access end and the switch cabinet entrance are arranged opposite to each other, and the position where the two are in contact is the overlapping part. The bus duct access end is provided with a first inclined portion at the end opposite to the switch cabinet entrance, and a second inclined portion is provided at the end of the switch cabinet entrance opposite to the bus duct access end. The other end of the first inclined portion and the other end of the second inclined portion are both provided with a straight portion, and the position where the two straight portions intersect is the overlapping portion. The overlapping bus duct access end, the first inclined portion, the second inclined portion and the two end portions of the switch cabinet entrance are all wrapped with insulating materials. Four temperature and humidity sensors are respectively fixed on the four phase lines at the switch cabinet entrance, and the other end of the temperature and humidity sensor is connected to the control board inside the switch cabinet.

[0011] Preferably, the current transformer acquisition submodule includes four current transformers, and the four current transformers are respectively arranged around the four power supply lines connected to the copper busbar of the bus duct. The four power supply lines include live wire A, live wire B, live wire C and neutral wire. In a single-channel connection, the current transformer and the resistor are connected in series, one end of the resistor is connected to the negative pole of the VDD / power supply and the analog-to-digital conversion module ADC input end, and the other end of the resistor is connected to the positive pole of the analog-to-digital conversion module ADC input end, and is connected to the switch cabinet control module. The voltage sampled by the analog-to-digital conversion module ADC in the four power supply lines is converted into the corresponding current value of each phase line inside the chip.

[0012] Preferably, the analog-to-digital conversion module ADC307 may adopt a discrete ADC chip on a PCB board, or may adopt an ADC inside a switch cabinet control module chip.

[0013] Preferably, the remote communication module and the communication module are both connected to the router and then reach the Internet using a hybrid communication method of power carrier and wireless. The power carrier adopts the international standard HomePlug or the State Grid power carrier communication standard, and the wireless adopts Zigbee or WiFi protocol.

[0014] Preferably, the temperature and humidity monitoring server includes a software program that can analyze the conductor characteristics of the specific bus duct connection copper busbar interface, and has the function of mobile phone alarm and sending instructions to the corresponding distribution room temperature and humidity control system.

[0015] Compared with the prior art, the beneficial effect of the present invention is that the system can simultaneously consider the settings of different rated currents under different temperature conditions, and alarm only when the copper busbar connected to the bus duct exceeds the rated current under the current temperature conditions or exceeds a very large absolute temperature and humidity or current value, thereby maximizing the current carrying capacity of the copper busbar connected to the bus duct without causing the loss of the copper busbar connected to the bus duct and ultimately leading to the occurrence of a dangerous situation. In addition, when the threshold is exceeded, an alarm signal is sent on the one hand, and the temperature and humidity control system of the distribution room is started at the same time for automatic adjustment.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 The bus duct at the switch cabinet interface of the present invention is connected to the copper bar structure;

[0020] Figure 3 The switch cabinet current measurement structure and circuit diagram of the present invention;

[0021] Figure 4 It is a flow chart of the workflow of the present invention.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 101. Switch cabinet; 102. Temperature, humidity and current measurement module; 103. Remote communication module; 104. Temperature and humidity monitoring server; 105. Data receiving and sending module; 106. Switch cabinet temperature and humidity determination module; 107. Temperature and humidity control system; 108. Communication module; 109. Temperature and humidity control center; 110. Bus duct; 111. Control module; 201. Bus duct access end; 202. First inclined portion; 203. Straight portion; 204. Overlapping portion; 205. Second inclined portion; 206. Switch cabinet entrance; 207. Temperature and humidity sensor; 301. Current transformer; 302. Live wire A; 303. Live wire B; 304. Live wire C; 305. Neutral wire; 306. Resistance; 307. Analog-to-digital conversion module ADC; 308. Switch cabinet control module. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figures 1 to 4The present invention provides a technical solution for the temperature and humidity automatic control system of a power distribution room to ensure the safety of a switch cabinet: a temperature and humidity automatic control system for a power distribution room to ensure the safety of a switch cabinet, comprising a switch cabinet 101, a temperature and humidity current measurement module 102, a remote communication module 103, a temperature and humidity monitoring server 104, a data receiving and sending module 105, a switch cabinet temperature and humidity determination module 106, a bus duct 110 and a control module 111, the temperature and humidity current measurement module 102, the remote communication module 103 and the control module 111 are all installed inside the switch cabinet 101, the data receiving and sending module 105 and the switch cabinet temperature and humidity determination module 106 are all installed inside the temperature and humidity monitoring server 104, the temperature and humidity control system 107 includes a communication module 108 and a temperature and humidity control center 109, the temperature and humidity current measurement module 102 is used to collect and obtain the switch The temperature, humidity and current data of the copper busbar conductor inside the cabinet 101 and the interface part of the bus duct 110, the control module 111 is used to determine whether the absolute current or temperature and humidity data exceeds the locally set absolute threshold 1, the remote temperature and humidity monitoring server 104 is used to receive the temperature, humidity and current data periodically sent by the switch cabinet 101 through the remote communication module 103, the switch cabinet temperature and humidity determination module 106 in the remote temperature and humidity monitoring server 104 analyzes and determines whether the temperature, humidity and current cross the threshold 2 obtained by the server query according to the performance parameters of the copper busbar conductor inside the corresponding switch cabinet 101 and the interface part of the bus duct 110, and decides whether to send an alarm to the mobile phone according to the situation, and at the same time, the data receiving and sending module 105 sends instructions to the temperature and humidity control system 107 in the distribution room, and automatically starts the temperature and humidity control system 107 to adjust the temperature and humidity in the distribution room.

[0026] The temperature, humidity and current measurement module 102 is divided into a temperature and humidity sensor acquisition submodule and a current transformer acquisition submodule.

[0027] The temperature and humidity sensor acquisition submodule is located between the switch cabinet 101 and the bus duct 110 connected to the copper bus power supply interface, and the two ends of the temperature and humidity sensor acquisition submodule are respectively provided with a bus duct access end 201 and a switch cabinet entrance 206, the bus duct access end 201 and the switch cabinet entrance 206 are both three-phase four-wire A, B, C, N and arranged in the same order, the bus duct access end 201 and the switch cabinet entrance 206 are connected to the copper bus through the bus duct 110 and plugged together to provide electrical connection, the bus duct access end 201 and the switch cabinet entrance 206 are arranged opposite to each other, and the position where the two are in contact is the overlapping part 204, and the bus duct access end 201 is provided with a first inclined part 202 at the end opposite to the switch cabinet entrance 206, and the switch cabinet entrance 206 and A second inclined portion 205 is provided at the end opposite to the bus duct access end 201, and a straight portion 203 is provided at the other end of the first inclined portion 202 and the other end of the second inclined portion 205. The intersection of the two straight portions 203 is an overlapping portion 204. The overlapping portion 204, the bus duct access end 201, the first inclined portion 202, the second inclined portion 205 and the two end portions of the switch cabinet entrance 206 are wrapped with insulating materials to isolate them from the outside air. The only part that has space and contacts with each phase conductor is the straight portion 203 adjacent to the upper and lower overlapping portion 204. Four temperature and humidity sensors 207 are respectively fixed on the four phase lines at the switch cabinet entrance 206, and the other end of the temperature and humidity sensor 207 is connected to the control board 111 inside the switch cabinet 101.

[0028] The current transformer acquisition submodule includes four current transformers 301, which are respectively arranged around the four power supply lines connected to the copper busbar of the bus duct 110. The four power supply lines include live wire A302, live wire B303, live wire C304 and neutral wire 305. In a single-channel connection, the current transformer 301 and the resistor 306 are connected in series, one end of the resistor 306 is connected to the negative electrode of the VDD / 2 power supply and the input end of the analog-to-digital conversion module ADC307, and the other end of the resistor 306 is connected to the positive electrode of the input end of the analog-to-digital conversion module ADC307, and is connected to the switch cabinet control module 308. The voltage sampled by the analog-to-digital conversion module ADC307 in the four power supply lines is converted into the corresponding current value of each phase line inside the chip.

[0029] The analog-to-digital conversion module ADC (307) can use a discrete ADC chip on a PCB board, or can use the ADC inside the switch cabinet control module 308 chip.

[0030] Both the remote communication module 103 and the communication module 108 use a hybrid communication method of power carrier and wireless to connect to the router and then reach the Internet. The power carrier uses the international standard HomePlug, and the wireless uses Zigbee or WiFi protocol. Wired and wireless can switch between each other to ensure the stability and reliability of communication.

[0031] The temperature and humidity monitoring server 104 includes a software program that can analyze the conductor characteristics of the copper busbar interface connected to the specific bus duct 110, and has the function of sending mobile phone alarms and instructions to the corresponding distribution room temperature and humidity control system 107. It can also analyze and determine the working condition of the electrical system based on the normal working temperature range, humidity range, and current range of the electrical products, and diagnose and prevent faults in real time.

[0032] A specific application of this embodiment is: the temperature and humidity acquisition and current acquisition system of the switch cabinet 101 samples and collects data according to the period set by the user, and the control module 111 controls the switch cabinet temperature and humidity determination module 106 to judge the collected temperature and humidity or current value. If the collected temperature and humidity or current value exceeds the local threshold value 1 set by the switch cabinet control module 308, the local control module 111 starts the local alarm through sound, light or electrical signal, and immediately cuts off the power supply current to the switch cabinet 101. The switch cabinet control module 308 periodically sends the collected temperature, humidity and current data to the temperature and humidity monitoring server 104 through the remote communication 103. The switch cabinet temperature and humidity determination module 106 in the temperature and humidity monitoring server 104 connects the copper busbar of the switch cabinet 101 and the bus duct 110. The conductor material and size of the port are used to calculate the rated current of the conductor under the measured temperature and humidity. If the rated current under the temperature and humidity exceeds the threshold value 2 set by the temperature and humidity monitoring server 104, the data receiving and sending module 105 sends an instruction to the temperature and humidity control system 107 in the distribution room, and automatically starts the temperature and humidity control system 107 to adjust the temperature and humidity in the distribution room; if the measured current exceeds the calculated rated current, a mobile phone alarm is sent to remind the management personnel to optimize the load of the distribution room to reduce current consumption. The local temperature and humidity and current threshold 1 of the switch cabinet 101 are the maximum safety thresholds, which are respectively higher than the temperature and humidity and current threshold 2 set by the server. Therefore, if the temperature, humidity or current collected by the switch cabinet 101 exceeds the local threshold value 1, the temperature and humidity monitoring server 104 will be triggered to send a mobile phone alarm signal while the local alarm is triggered.

[0033] The system can simultaneously consider the settings of different rated currents under different temperature conditions, and will alarm only when the copper busbar connected to the bus duct 110 exceeds the rated current under the current temperature conditions or exceeds a very large absolute temperature and humidity or current value, thereby maximizing the current carrying capacity of the copper busbar connected to the bus duct 110 without causing the loss of the copper busbar connected to the bus duct 110 and ultimately leading to the occurrence of a dangerous situation. In addition, when the threshold is exceeded, an alarm signal is sent on the one hand, and the temperature and humidity control system 107 of the distribution room is started for automatic adjustment at the same time.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic temperature and humidity control system for the power distribution room to ensure the safety of the switch cabinet. It is characterized in that The invention comprises a switch cabinet (101), a temperature and humidity current measuring module (102), a remote communication module (103), a temperature and humidity monitoring server (104), a data receiving and sending module (105), a switch cabinet temperature and humidity determination module (106), a bus duct (110) and a control module (111), wherein the temperature and humidity current measuring module (102), the remote communication module (103) and the control module (111) are all installed inside the switch cabinet (101), the data receiving and sending module (105) and the switch cabinet temperature and humidity determination module (106) are all installed inside the temperature and humidity monitoring server (104), the temperature and humidity control system (107) comprises a communication module (108) and a temperature and humidity control center (109), and the temperature and humidity current measuring module (102) is used to collect and obtain the temperature and humidity inside the switch cabinet (101) and the bus duct (110). 10) temperature, humidity and current data of the copper busbar conductor at the interface part, the control module (111) is used to determine whether the absolute current or temperature and humidity data exceeds the locally set absolute threshold value 1, the temperature and humidity monitoring server (104) is used to receive the temperature, humidity and current data periodically sent by the switch cabinet (101) through the remote communication module (103), the switch cabinet temperature and humidity determination module (106) in the temperature and humidity monitoring server (104) calculates the rated current of the conductor under the measured temperature and humidity according to the material and size of the copper busbar conductor at the interface part in the corresponding switch cabinet (101) and the bus duct (110), and determines whether the rated current under the measured temperature and humidity exceeds the threshold value 2 set by the temperature and humidity monitoring server (104); the data receiving and sending module (105) is used to send instructions to the temperature and humidity control system (107) in the power distribution room; If the collected temperature, humidity or current value exceeds the local threshold value 1 set by the switch cabinet control module (308), a local alarm is activated through the local control module (111), and the power supply current to the switch cabinet (101) is immediately cut off; if the rated current under the measured temperature and humidity exceeds the threshold value 2 set by the temperature and humidity monitoring server (104), a command is sent to the temperature and humidity control system (107) in the power distribution room through the data receiving and sending module (105), and the temperature and humidity control system (107) is automatically started to adjust the temperature and humidity in the power distribution room; if the measured current exceeds the calculated rated current, an alarm is sent to a mobile phone to remind the management personnel to optimize the load of the power distribution room to reduce current consumption.

2. According to claim 1, a temperature and humidity automatic control system for a power distribution room that ensures the safety of a switch cabinet, Features: The temperature, humidity and current measurement module (102) is divided into a temperature and humidity sensor acquisition submodule and a current transformer acquisition submodule.

3. According to claim 2, a temperature and humidity automatic control system for a power distribution room that ensures the safety of a switch cabinet, Features: The temperature and humidity sensor acquisition submodule is located between the switch cabinet (101) and the copper busbar power supply interface connected to the bus duct (110), and is respectively the bus duct access end (201) and the switch cabinet entrance (206). The bus duct access end (201) and the switch cabinet entrance (206) are both three-phase four-wire A, B, C, N and are arranged in the same order. The bus duct access end (201) and the switch cabinet entrance (206) are connected to the copper busbar through the bus duct (110) and are plugged together to provide electrical connection. The bus duct access end (201) and the switch cabinet entrance (206) are arranged opposite to each other, and the position where the two are in contact is the overlapping part (204). The end of the bus duct access end (201) opposite to the switch cabinet entrance (206) is provided with a first inclined part (202). A second inclined portion (205) is provided at one end of the switch cabinet entrance (206) opposite to the bus duct access end (201), and a straight portion (203) is provided at the other end of the first inclined portion (202) and the other end of the second inclined portion (205), and the intersection of the two straight portions (203) is an overlapping portion (204). The overlapping portion (204), the bus duct access end (201), the first inclined portion (202), the second inclined portion (205) and both ends of the switch cabinet entrance (206) are wrapped with insulating materials. Four temperature and humidity sensors (207) are respectively fixed on the four phase lines of the switch cabinet entrance (206), and the other ends of the temperature and humidity sensors (207) are connected to the control module (111) inside the switch cabinet (101).

4. According to claim 2, a temperature and humidity automatic control system for a power distribution room that ensures the safety of a switch cabinet, Features: The current transformer acquisition submodule comprises four current transformers (301), the four current transformers (301) are respectively sleeved around the bus duct (110) connecting the copper bar to four power supply lines, the four power supply lines comprising a live line A (302), a live line B (303), a live line C (304) and a neutral line (305), in a single-line connection, the current transformer (301) and a resistor (306) are connected in series, one end of the resistor (306) is connected to a VDD / 2 power supply and the negative electrode of an analog-to-digital conversion module ADC (307) input end, the other end of the resistor (306) is connected to the positive electrode of the analog-to-digital conversion module ADC (307) input end, and is connected to a switch cabinet control module (308), the voltage sampled by the analog-to-digital conversion module ADC (307) in the four power supply lines is converted into a corresponding current value of each phase line inside the chip.

5. According to claim 4, a temperature and humidity automatic control system for a power distribution room that ensures the safety of a switch cabinet, Features: The analog-to-digital conversion module ADC (307) uses a discrete ADC chip on a PCB board, or uses an ADC inside a chip of a switch cabinet control module (308).

6. According to claim 1, a temperature and humidity automatic control system for a power distribution room that ensures the safety of a switch cabinet, Features: The remote communication module (103) and the communication module (108) are both connected to the router and then reach the Internet by means of power line carrier and wireless hybrid communication. The power line carrier adopts the international standard HomePlug or the national power line carrier communication standard, and the wireless adopts the Zigbee or WiFi protocol.

7. According to claim 1, a temperature and humidity automatic control system for a power distribution room that ensures the safety of a switch cabinet, Features: The temperature and humidity monitoring server (104) includes a software program capable of analyzing the conductor characteristics of the copper busbar interface connected to the specific bus duct (110), and has the functions of sending a mobile phone alarm and sending instructions to the corresponding distribution room temperature and humidity control system (107).

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