Wireless temperature and humidity monitoring device for high-voltage switch cabinet

A technology for wireless temperature and humidity monitoring of cabinets, applied in the field of wireless temperature and humidity monitoring devices for high-voltage switch cabinets, can solve problems such as communication reliability decline, lithium battery capacity limitation, electrolyte leakage, etc., to avoid overheating of equipment contacts and low heat generation , the effect of improving the level of automation

Inactive Publication Date: 2013-09-11
STATE GRID JIANGSU ELECTRIC POWER CO LIANYUNGANG POWER SUPPLY CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned monitoring system has two shortcomings. One is that the lithium battery is limited by capacity and needs to be replaced. At the same time, there are safety hazards such as flammable and explosive, and electrolyte leakage.
The second is that the wireless system with a single communication frequency band is susceptible to electromagnetic field interference generated by other power or communication equipment in the substation, resulting in data packet loss and decreased communication reliability.

Method used

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  • Wireless temperature and humidity monitoring device for high-voltage switch cabinet
  • Wireless temperature and humidity monitoring device for high-voltage switch cabinet
  • Wireless temperature and humidity monitoring device for high-voltage switch cabinet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, with reference to Figure 1-4 , a wireless temperature and humidity monitoring device for a high-voltage switchgear, which includes a plurality of monitoring terminals, a plurality of monitoring master stations and a background host computer; each switchgear is equipped with a monitoring master station and a plurality of monitoring terminals, and the monitoring master station and Two frequency band radio frequency communication modules of 433M and 2.4G are used for data transmission between monitoring terminals; RS-485 communication is used between the monitoring master station and the host computer;

[0020] The monitoring terminal consists of a microcontroller STM32, a thermistor MF51, a precision trimmer potentiometer, a voltage divider resistor, a function selection code switch, a current transformer power supply module, a 433M intermediate frequency radio frequency module SI4432, and a 2.4G high frequency radio frequency module. The module CC2520 is c...

Embodiment 2

[0022] Embodiment 2, in the high-voltage switchgear wireless temperature and humidity monitoring device described in Embodiment 1: the monitoring terminal is powered by a current transformer power supply module with overvoltage protection, and the current transformer power supply module is composed of a sampling resistor R1, a rectifier Bridge W1, transient imitation diode TVS, Zener tube D1, Zener tube current limiting resistor R2, power tube T1, discharge protection resistor R4, power tube gate current limiting resistor R3, front-end filter capacitor C1, DC / DC conversion Composed of filter and back-end filter capacitor C2; sampling resistor R1, transient analog diode TVS are connected in parallel with the AC input end of rectifier bridge W1; the DC output end of rectifier bridge W1 is connected in parallel with front-end filter capacitor C1; voltage regulator tube D1 and voltage regulator tube The current limiting resistor R2 is connected in series with the DC output of the c...

Embodiment 3

[0023] Embodiment 3, the high-voltage switchgear wireless temperature and humidity monitoring device described in Embodiment 1 or 2 is characterized in that: the background host computer has monitoring software, and performs data transmission with the monitoring master station through the RS-485 bus; the monitoring software can display Monitoring data, alarm information and relay action status; when the number of monitoring master stations connected to the background host computer exceeds 4, the monitoring software uses a wheel display to display the data; when the monitoring data uploaded by several monitoring master stations exceeds the standard at the same time, the monitoring software The monitoring data of the first alarm will be displayed at the top, and the highlighted alarm light and alarm audio will be turned on; the monitoring software will issue modification commands for various alarm thresholds, exhaust air thresholds, heating thresholds, radio frequency communicatio...

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PUM

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Abstract

The invention discloses a wireless temperature and humidity monitoring device for a high-voltage switch cabinet. The device is characterized by comprising a plurality of monitoring terminals, a plurality of monitoring master stations and a background upper computer, wherein each switch cabinet is provided with a monitoring master station and a plurality of monitoring terminals; the monitoring master station performs data transmission with the monitoring terminals by adopting radio frequency communication modules at the two frequency bands of 433M and 2.4G; and the monitoring master stations perform RS-485 communication with the upper computer. The device is more rational in design and can be used conveniently and safely; and the electrical equipment contact temperature and environmental temperature and humidity of the switch cabinet can be monitored on line in real time.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a wireless temperature and humidity monitoring device for a high-voltage switch cabinet. Background technique [0002] In substations, due to the aging of components or excessive contact resistance, the contacts of important equipment such as cable joints and circuit breaker contacts in high-voltage switchgear may experience abnormal temperature rise during long-term operation. Especially when accidents such as three-phase current imbalance or short circuit occur in the power grid, the temperature rise is particularly serious. Most high-voltage electrical equipment in substations adopts a closed structure, which has poor heat dissipation effect. If timely and effective monitoring measures are not taken for the corresponding contact temperature, the equipment will cause fire accidents due to excessive temperature rise, which will cause large-scale power outages and cause huge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00
CPCY04S40/126Y02E60/7853Y02E60/00
Inventor 衡思坤朱立位应展烽郭昊坤陈运运王万纯吴军基
Owner STATE GRID JIANGSU ELECTRIC POWER CO LIANYUNGANG POWER SUPPLY CO
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