阅读说明：本技术 一种配电室低压配电柜及变压器无线测温系统及其操作方法 (Wireless temperature measurement system for low-voltage power distribution cabinet and transformer of power distribution room and operation method of wireless temperature measurement system ) 是由 王强 王崇智 赵淑慧 马耀 倪江强 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种配电室低压配电柜及变压器无线测温系统及其操作方法,所述配电室低压配电柜及变压器无线测温系统包括：无线测温终端和无线汇聚终端；所述无线测温终端的数量为多个,用于设置于测温区的发热点,采集温度数据并输出；其中,所述发热点包括高压母线、低压母线、高压开关和低压开关；所述无线测温终端包括：温度传感器和无线数据变换器；所述无线汇聚终端用于通过无线通讯的方式接收所述无线测温终端输出的温度数据,用于通过光纤以太网或GPRS/CDMA将数据传送到测温区外。本发明的系统或方法可在高、低压环境下精确测量温度,可实现准确有效地实时监控。(The invention discloses a distribution room low-voltage power distribution cabinet and transformer wireless temperature measurement system and an operation method thereof, wherein the distribution room low-voltage power distribution cabinet and transformer wireless temperature measurement system comprises: the wireless temperature measuring terminal and the wireless convergence terminal are arranged; the wireless temperature measuring terminals are arranged at the heating points of the temperature measuring area, and are used for collecting and outputting temperature data; the heating point comprises a high-voltage bus, a low-voltage bus, a high-voltage switch and a low-voltage switch; the wireless temperature measurement terminal comprises: a temperature sensor and a wireless data converter; the wireless convergence terminal is used for receiving the temperature data output by the wireless temperature measurement terminal in a wireless communication mode and transmitting the data to the outside of the temperature measurement area through the optical fiber Ethernet or GPRS/CDMA. The system or the method can accurately measure the temperature in high and low pressure environments, and can realize accurate, effective and real-time monitoring.)

1. The utility model provides a wireless temperature measurement system of electricity distribution room low-voltage distribution cabinet and transformer, its characterized in that includes: the wireless temperature measuring terminal and the wireless convergence terminal are arranged;

the wireless temperature measuring terminals are arranged at the heating points of the temperature measuring area, and are used for collecting and outputting temperature data; the heating point comprises a high-voltage bus, a low-voltage bus, a high-voltage switch and a low-voltage switch; the wireless temperature measurement terminal comprises: a temperature sensor and a wireless data converter;

the wireless convergence terminal is used for receiving the temperature data output by the wireless temperature measurement terminal in a wireless communication mode and transmitting the data to the outside of the temperature measurement area through the optical fiber Ethernet or GPRS/CDMA.

2. The distribution room low-voltage distribution cabinet and transformer wireless temperature measurement system according to claim 1, wherein the wireless temperature measurement terminal is one or more in type.

3. The wireless temperature measurement system for the low-voltage power distribution cabinet and the transformer of the power distribution room as claimed in claim 1, wherein in the wireless temperature measurement terminal, the temperature sensor and the wireless data converter are both used for being attached to and connected with a heating point through a data line; the temperature sensor is used for sensing temperature and converting the temperature into an electric signal, and the wireless data converter is used for receiving the electric signal and transmitting a processed temperature value to the wireless convergence terminal in a wireless mode.

4. The distribution room low-voltage distribution cabinet and transformer wireless temperature measurement system according to claim 3, wherein a wireless relay station is arranged or not arranged between the wireless data converter and the wireless convergence terminal.

5. The distribution room low-voltage distribution cabinet and transformer wireless temperature measurement system according to claim 1, wherein the wireless communication mode is a short-range wireless network mode.

6. The distribution room low-voltage distribution cabinet and transformer wireless temperature measurement system according to claim 5, wherein the wireless communication mode is 433 MHz.

7. The system of claim 1, wherein the wireless convergence terminal is a YGWT-2000C/N wireless convergence terminal.

8. The wireless temperature measurement system for the distribution room low-voltage power distribution cabinet and the transformer according to claim 1, further comprising:

and the wireless acquisition convergence terminal transmits the received data to the GPRS/CDMA through the RS232 and then the GPRS/CDMA remotely transmits the data to a computer of the control center.

9. The wireless temperature measurement system for the distribution room low-voltage power distribution cabinet and the transformer according to claim 1, further comprising:

and the display device is arranged outside the temperature measuring area or the temperature measuring area and used for displaying the acquired temperature data or the alarm information.

10. A distribution room low-voltage power distribution cabinet and transformer wireless temperature measurement method is characterized in that the distribution room low-voltage power distribution cabinet and transformer wireless temperature measurement system based on claim 1 comprises the following steps:

attaching a preset number and types of wireless aggregation terminals to heating points of a temperature measuring area; the heating point comprises a high-voltage bus, a low-voltage bus, a high-voltage switch and a low-voltage switch; the wireless temperature measurement terminal comprises: a temperature sensor and a wireless data converter;

the temperature sensor senses the temperature of the heating point and converts the temperature into an electric signal, and the wireless data converter receives the electric signal through a data line and transmits a processed temperature value to the wireless convergence terminal in a wireless mode;

and the wireless convergence terminal transmits the received data to the outside of the temperature measuring area through the optical fiber Ethernet or GPRS/CDMA to finish temperature measurement.

Technical Field

The invention belongs to the technical field of power system temperature measurement, and particularly relates to a wireless temperature measurement system for a low-voltage power distribution cabinet and a transformer of a power distribution room and an operation method thereof.

Background

The basic situations of the power supply system of Shaanxi south Beam mining industry Limited company include: one 10kV substation in an industrial field, one fan pressing room and one main fan room. The power transformation and distribution room mainly plays the roles of ventilation of a whole mine, air compression of the mine and ground auxiliary production lighting system.

In an electric power system, when a load current is too large, power equipment such as a high-low voltage switch and a current-carrying bus may have a problem of too high temperature rise, which may eventually cause performance degradation and even breakdown of adjacent charged components, and the reasons include:

(1) arc short circuit faults are caused by overheating of switch joints of a low-voltage distribution room of the blower room and overhigh bus temperature, so that a breaker of the incoming line cabinet is burnt out; the 400A air switch burns out the trouble because of heating up in 10kV electric substation feeder switch in industrial field. A cable head breakdown fault is caused by heating of a high-voltage connector of a box transformer substation in a power distribution room 630 of a main fan room;

(2) 400KVA oil of a 10kV substation in an industrial field is immersed into a joint bus of a transformer to generate heat, so that a wiring terminal of the transformer is burnt out.

The above failures cause economic losses to production and operation; by monitoring the operation conditions of the bus contact, the low-voltage cable joint and the low-voltage switch contact temperature, the high-voltage transmission and power transformation faults can be effectively prevented, and effective guarantee is provided for realizing safe production. Therefore, it is a major problem to be solved urgently by the power system to adopt effective measures to monitor the contact temperature of the low-voltage bus and the low-voltage switch.

Many buses and switches are at high potential, and few instruments are currently dedicated to low voltage buses, low voltage switches and electrical contact heating measurements. The temperature monitoring method comprises the following steps: one is to coat a layer of luminescent material with color changing with temperature on the surface of the low-voltage electric contact, and to roughly determine the temperature range by observing the color change, the method has low accuracy and poor reliability, and can not carry out quantitative measurement; the other method is an infrared thermal imager utilizing radiation characteristics, which has high accuracy, but is inconvenient to use in specific occasions such as a low-voltage switch cabinet and the like due to the need of an optical device, has high price and is difficult to popularize and apply; more importantly, the two modes need manual inspection, temperature data cannot be obtained in real time, the obtained data are always lagged, the temperature real-time alarm function cannot be achieved, and the electronic instrument in the wired communication mode does not accord with the specification of the electric power high-voltage environment measuring instrument. The concrete mode still includes: the hand-held infrared thermometer collects the temperature of hundreds of points every time by a person several times every day, has large workload and low precision, and even some high-voltage switch cabinets are closed and cannot be measured at all; wax sheet temperature measurement is to paste the wax sheet on a node, and the color of the wax sheet is changed when the temperature is too high, so that the wax sheet needs to be observed by human eyes, and the same problem also exists; the optical fiber temperature measurement is improved a lot, the temperature is digitized by the temperature measurement point single chip microcomputer and then transmitted to the concentrator through the optical fiber, the concentrator is connected to a computer system, and data storage and overtemperature alarm are timed.

In summary, a novel wireless temperature measurement system for a low-voltage power distribution cabinet and a transformer of a power distribution room and an operation method thereof are needed.

Disclosure of Invention

The invention aims to provide a distribution room low-voltage power distribution cabinet, a transformer wireless temperature measurement system and an operation method thereof, so as to solve one or more technical problems. The system or the method can accurately measure the temperature in high and low pressure environments, and can realize accurate, effective and real-time monitoring.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention discloses a distribution room low-voltage power distribution cabinet and transformer wireless temperature measurement system, which comprises: the wireless temperature measuring terminal and the wireless convergence terminal are arranged;

the wireless temperature measuring terminals are arranged at the heating points of the temperature measuring area, and are used for collecting and outputting temperature data; the heating point comprises a high-voltage bus, a low-voltage bus, a high-voltage switch and a low-voltage switch; the wireless temperature measurement terminal comprises: a temperature sensor and a wireless data converter;

the wireless convergence terminal is used for receiving the temperature data output by the wireless temperature measurement terminal in a wireless communication mode and transmitting the data to the outside of the temperature measurement area through the optical fiber Ethernet or GPRS/CDMA.

The invention is further improved in that the wireless temperature measuring terminal is one or more in type.

The wireless temperature measuring terminal is further improved in that in the wireless temperature measuring terminal, the temperature sensor and the wireless data converter are both used for attaching to and heating points and are connected through data lines; the temperature sensor is used for sensing temperature and converting the temperature into an electric signal, and the wireless data converter is used for receiving the electric signal and transmitting a processed temperature value to the wireless convergence terminal in a wireless mode.

The invention is further improved in that a wireless relay station is arranged or not arranged between the wireless data converter and the wireless aggregation terminal.

The invention is further improved in that the wireless communication mode is a short-range wireless network mode.

The invention is further improved in that the wireless communication mode adopts 433 MHz.

The invention is further improved in that the wireless convergence terminal is a YGWT-2000C/N type wireless convergence terminal.

The invention further improves the method and also comprises the following steps: and the wireless acquisition convergence terminal transmits the received data to the GPRS/CDMA through the RS232 and then the GPRS/CDMA remotely transmits the data to a computer of the control center.

The invention further improves the method and also comprises the following steps: and the display device is arranged outside the temperature measuring area or the temperature measuring area and used for displaying the acquired temperature data or the alarm information.

The invention discloses a wireless temperature measurement method for a low-voltage power distribution cabinet and a transformer of a power distribution room, which comprises the following steps of:

attaching a preset number and types of wireless aggregation terminals to heating points of a temperature measuring area; the heating point comprises a high-voltage bus, a low-voltage bus, a high-voltage switch and a low-voltage switch; the wireless temperature measurement terminal comprises: a temperature sensor and a wireless data converter;

the temperature sensor senses the temperature of the heating point and converts the temperature into an electric signal, and the wireless data converter receives the electric signal through a data line and transmits a processed temperature value to the wireless convergence terminal in a wireless mode;

and the wireless convergence terminal transmits the received data to the outside of the temperature measuring area through the optical fiber Ethernet or GPRS/CDMA to finish temperature measurement.

Compared with the prior art, the invention has the following beneficial effects:

the wireless power temperature measurement system provided by the invention can accurately measure the temperature in high and low voltage environments, and accurately and effectively realize real-time monitoring.

Specifically, in the technical scheme of the invention, a wireless temperature monitoring system is formed by utilizing a wireless temperature sensor and a YGWT-2000C/N type wireless convergence terminal; the temperature sensor transmits the temperature to a wireless convergence terminal (also called concentrator) by adopting short-range wireless communication, and the wireless concentrator transmits temperature data to a monitoring center by adopting modes such as optical fiber communication or GPRS communication and the like, so that the centralized monitoring of the temperature is realized.

Specifically, the wireless temperature measuring terminal transmits the temperature signal to the wireless aggregation terminal in a wireless manner directly or through the wireless relay station, and the wireless aggregation terminal can receive data transmitted by a plurality of temperature measuring terminals and determines whether to use the wireless relay station according to the measuring environment and the physical positions of the temperature measuring terminals; when the temperature measuring terminal and the wireless convergence terminal are within an effective communication distance, no wireless relay station is needed to be added. The system adopts a short-range wireless network mode, a plurality of temperature measuring terminals are distributed around the effective periphery of the wireless convergence terminal, and the temperature measuring terminals can be added, deleted and moved at will in the communication range.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; it is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic diagram of a distribution room low-voltage power distribution cabinet and a transformer wireless temperature measurement system according to an embodiment of the invention.

Detailed Description

In order to make the purpose, technical effect and technical solution of the embodiments of the present invention clearer, the following clearly and completely describes the technical solution of the embodiments of the present invention with reference to the drawings in the embodiments of the present invention; it is to be understood that the described embodiments are only some of the embodiments of the present invention. Other embodiments, which can be derived by one of ordinary skill in the art from the disclosed embodiments without inventive faculty, are intended to be within the scope of the invention.

Referring to fig. 1, a distribution room low-voltage power distribution cabinet and transformer wireless temperature measurement system according to an embodiment of the present invention includes: the wireless temperature measurement system comprises a plurality of wireless temperature measurement sensors and a wireless convergence terminal; the wireless temperature measuring sensor and the wireless convergence terminal are both arranged on a temperature measuring site.

In the embodiment of the invention, the wireless temperature measurement terminal is powered by a CT power supply mode of the device, can be powered by a high-energy battery under the condition that the CT power supply can not meet the requirement, can reduce the electrical connection between high voltage and low voltage in two modes, works in a full digital mode, is attached to a heating point (a high-voltage bus or a low-voltage bus or a high-voltage switch) by a temperature sensor, is connected with a wireless data converter by a section of data line (the temperature sensor and the data converter are together called as the wireless temperature measurement terminal), and is attached to the high-voltage bus or the high-voltage switch and works in a high-voltage environment for a. The wireless temperature measuring terminal transmits the temperature signal to the wireless convergence terminal in a wireless mode directly or through the wireless relay station, the wireless convergence terminal can receive data transmitted by the plurality of temperature measuring terminals, and whether the wireless relay station is used is determined by a measuring environment and the physical position of each temperature measuring terminal. When the temperature measuring terminal and the wireless convergence terminal are within an effective communication distance, no wireless relay station is needed to be added. The system adopts a short-range wireless network mode, a plurality of temperature measuring terminals are distributed around the effective periphery of the wireless convergence terminal, and the temperature measuring terminals can be added, deleted and moved at will in the communication range.

In another embodiment of the present invention, the wireless aggregation terminal may also be installed in a control center, and computer software of the control center monitors the temperature change of each point in real time, so as to realize that the heating status of the whole high voltage system can be mastered without going out of home, and further make a correct decision. The wireless convergence terminal can transmit the received data to a computer of the control center through the optical fiber Ethernet or GPRS/CDMA, and the data is processed by background software of the computer to stably transmit the temperature measurement data to the monitoring center in real time. Specifically, the temperature sensor is attached to the heating point and is connected with the wireless data converter through a section of conducting wire, and the wireless data converter is also attached to the high-voltage line and the low-voltage line or the high-voltage switch and the low-voltage switch. The temperature sensor converts the sensed temperature into an electric signal, the electric signal is processed by the wireless converter to obtain a temperature value, the temperature value is wirelessly transmitted to the wireless aggregation terminal through the wireless relay station or directly transmitted to the wireless aggregation terminal, the wireless aggregation terminal can receive data transmitted by the wireless data converters, whether the relay station is used or not is determined by a measuring environment, the whole measuring range and the measuring point position of each wireless data converter, if all the wireless data converters are within an effective communication distance with the wireless acquisition aggregation terminal, the relay station is not added, and otherwise, the relay station is required to be added.

In the embodiment of the invention, if the control center is far away from the actual temperature measuring place in an unattended environment, the wireless acquisition convergence terminal can transmit the received data to the GPRS/CDMA through the RS232, and then the GPRS/CDMA transmits the data to the computer of the control center from a remote place and then the data is processed by the background software of the computer.

In the embodiment of the invention, the temperature detection range of the 10kV substation is the hot spot of the low-voltage bus bar of the 10kV/0.4kV transformer and the like, and the installation position of the 10kV substation in the industrial square is shown in table 1.

TABLE 1 installation position of 10kV substation in industrial square

Serial number	Mounting location	Device name	Model of the device	Number of devices	Unit of
						1	Transformer low-voltage bus bar	Wireless temperature measurement terminal	YGPWT-2000	18	An
2	10kV substation for industrial square	Collection terminal	YGWT-2000C/N	2	Table (Ref. Table)
						3	On-duty room	Wireless temperature measurement monitoring system	YGWT-2000J	1	Sleeve

The construction of the embodiment of the invention mainly comprises the following steps: and installing wireless temperature measuring terminal equipment at the positions of feed-out cable heads, low-voltage busbars and the like of all transformer low-voltage power distribution cabinets of the 10kV substation, and transmitting temperature signals to the dispatching intelligent power supply monitoring system through the collecting terminal equipment.

In the embodiment of the invention, the temperature detection range of the distribution room of the ventilator room is a hot spot easy to generate such as a 10kV inlet cabinet bus bar, and the installation position of the distribution room of the ventilator room is shown in table 2.

TABLE 2 ventilator room distribution room mounting location

Serial number	Mounting location	Device name	Model of the device	Number of devices	Unit of
						1	10KV incoming cabinet busbar	Wireless temperature measurement terminal	YGPWT-2000	18	An
2	Distribution room of ventilator room	Collection terminal	YGWT-2000C/N	2	Table (Ref. Table)
						3	Ventilator room on duty room	Wireless temperature measurement monitoring system	YGWT-2000J	1	Sleeve

In the embodiment of the invention, wireless temperature measuring terminal equipment is arranged at the positions of feeding out cable heads, low-voltage busbars and the like of all transformer low-voltage power distribution cabinets in a distribution room of a ventilator room, and temperature signals are transmitted to a dispatching intelligent power supply monitoring system through collecting terminal equipment.

In the embodiment of the invention, the temperature detection range of the power distribution room of the pressure fan room is the easy-to-generate points such as a low-voltage bus bar of a 10kV/0.66kV transformer, and the installation position of the power distribution room of the pressure fan room is shown in Table 3.

TABLE 3 installation position of distribution room of blower room

Serial number	Mounting location	Device name	Model of the device	Number of devices	Unit of
						1	Transformer low-voltage bus bar	Wireless temperature measurement terminal	YGPWT-2000	18	An
2	Power distribution room of forced draught fan room	Collection terminal	YGWT-2000C/N	1	Table (Ref. Table)
						3	Press fan room on duty room	Wireless temperature measurement monitoring system	YGWT-2000J	1	Sleeve

The construction of the embodiment of the invention mainly comprises the following steps: and wireless temperature measuring terminal equipment is arranged at the positions of feeding out cable heads, low-voltage busbars and the like of all transformer low-voltage power distribution cabinets of the power distribution room of the fan pressing room, and temperature signals are transmitted to the dispatching intelligent power supply monitoring system through the collecting terminal equipment.

Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can make modifications and equivalents to the embodiments of the present invention without departing from the spirit and scope of the present invention, which is set forth in the claims of the present application.