CN-121977721-A - Power equipment is with passive intelligent temperature measurement unit that gets electricity based on thing networking

CN121977721ACN 121977721 ACN121977721 ACN 121977721ACN-121977721-A

Abstract

The application relates to the technical field of temperature measuring equipment of power transmission and distribution lines, in particular to a passive electricity taking intelligent temperature measuring unit for power equipment based on the Internet of things. The power supply system comprises a CT power taking unit, a voltage conversion unit, a temperature sensor, a communication unit and a signal processing unit, wherein the CT power taking unit is used for taking power on a power cable, the voltage conversion unit is connected with the CT power taking unit and used for converting alternating current acquired by the CT power taking unit into direct current, the temperature sensor is connected with the voltage conversion unit and used for acquiring the temperature of the power cable, the communication unit is connected with the voltage conversion unit and the temperature sensor and used for transmitting temperature signals acquired by the temperature sensor to the signal processing unit, and the signal processing unit is used for amplifying the received temperature signals transmitted by the communication unit and then transmitting the temperature signals to the singlechip.

Inventors

ZHAO WEI
LU HE
HOU DANHUI
LIU WEI
WANG RUI
LI WEICHAO
LI YUANLIANG
LI KEQIANG
LIU BAO
SU SHANCHENG
GONG WENJIE
YANG FU
LING ZHIXIANG

Assignees

国网山东省电力公司济南供电公司

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (10)

1. Electric power equipment is with passive intelligent temperature measurement unit of getting electricity based on thing networking, its characterized in that: Comprising the following steps: The CT electricity taking unit is used for taking electricity on the power cable; The voltage conversion unit is connected with the CT electricity taking unit and used for converting the alternating current acquired by the CT electricity taking unit into direct current; The temperature sensor is connected with the voltage conversion unit and used for acquiring the temperature of the power cable; the communication unit is connected with the voltage conversion unit and the temperature sensor and is used for transmitting the temperature signal acquired by the temperature sensor to the signal processing unit; and the signal processing unit is used for amplifying the temperature signal transmitted by the received communication unit and transmitting the temperature signal to the singlechip.
2. The passive electricity taking intelligent temperature measuring unit for the electric power equipment based on the internet of things according to claim 1, wherein the temperature measuring unit is characterized in that: The CT electricity taking unit is an open-close type current transformer.
3. The passive electricity taking intelligent temperature measuring unit for the electric power equipment based on the internet of things according to claim 1, wherein the temperature measuring unit is characterized in that: the communication unit comprises a LoRa transmitting module and a LoRa receiving module.
4. The intelligent passive electricity-taking temperature measuring unit for the electric equipment based on the internet of things, which is characterized in that: The voltage conversion unit comprises an AC/DC rectifier bridge, and two input ends of the AC/DC rectifier bridge are respectively connected with two ends of the secondary side coil of the open-close type current transformer; one output end of the AC/DC rectifier bridge is connected with one end of the capacitor C and the input end of the filter circuit; The output end of the filter circuit is connected with the input end of the DC/DC unit; the output end of the DC/DC unit is electrically connected with the temperature sensor and the communication unit, and the temperature sensor is electrically connected with the communication unit; The other output end of the AC/DC rectifier bridge, the other end of the capacitor C, the grounding end of the filter circuit, the grounding end of the DC/DC unit, the grounding end of the temperature sensor and the grounding end of the LoRa transmitting module are connected with GND.
5. The passive electricity taking intelligent temperature measuring unit for the electric power equipment based on the internet of things according to claim 4, wherein: A smoothing reactor L is connected in series on a line, wherein one input end of the AC/DC rectifier bridge is connected with a secondary side coil of the open-close type current transformer.
6. The passive electricity taking intelligent temperature measuring unit for the electric power equipment based on the internet of things according to claim 4, wherein: a bleeder circuit is arranged between the AC/DC rectifier bridge and the filter circuit, the bleeder circuit comprises a voltage stabilizing diode VD, and the cathode of the voltage stabilizing diode VD is connected with one end of a capacitor C, one end of a discharge resistor RQ and the input end of the filter circuit; the anode of the voltage stabilizing diode VD is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with one end of a resistor R3 and one end of a resistor R2; The other end of the resistor R3 is connected with the grid electrode of the MOS tube; the other end of the resistor R2 is connected with GND and the source electrode of the MOS tube; the drain electrode of the MOS tube is connected with the other end of the discharge resistor RQ.
7. The passive electricity taking intelligent temperature measuring unit for the electric power equipment based on the internet of things according to claim 1, wherein the temperature measuring unit is characterized in that: The temperature sensor model is AD590.
8. The intelligent passive electricity-taking temperature measuring unit for the electric equipment based on the internet of things, which is characterized in that: The signal processing unit comprises a power supply module, a LoRa receiving module and a differential operational amplifier AD524, wherein: the input end of the LoRa receiving module is connected with one end of the power supply module and the 8 pins of the differential operational amplifier AD 524; the output end of the LoRa receiving module is connected with one end of a resistor R4 and the 2 pin of the differential operational amplifier AD 524; The other end of the resistor R4 is connected with one fixed end of the sliding resistor R5, the other end of the power module, the 7 pin of the differential operational amplifier AD524 and GND; the adjusting end of the sliding resistor R5 is connected with the 1 pin of the differential operational amplifier AD 524; the differential operational amplifier AD524 is electrically connected with the single chip through the 9 pins.
9. The intelligent passive electricity taking temperature measuring unit for the electric equipment based on the internet of things, which is characterized in that: The differential operational amplifier AD524 is short-circuited between 13 pins and 16 pins, short-circuited between 10 pins and 9 pins, and connected with GND between 6 pins.
10. The intelligent passive electricity taking temperature measuring unit for the electric equipment based on the internet of things, which is characterized in that: a sliding resistor R6 is connected in parallel between the 4 pins and the 5 pins of the differential operational amplifier AD524, and the sliding end of the sliding resistor R6 is connected with the 8 pins of the differential operational amplifier AD 524; A sliding resistor R7 is connected in parallel between the 14 pins and the 15 pins of the differential operational amplifier AD524, and a sliding end of the sliding resistor R7 is connected with the 7 pins of the differential operational amplifier AD 524.

Description

Power equipment is with passive intelligent temperature measurement unit that gets electricity based on thing networking Technical Field The application relates to the technical field of temperature measuring equipment of power transmission and distribution lines, in particular to a passive electricity taking intelligent temperature measuring unit for power equipment based on the Internet of things. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. Along with the development of society and economy, the requirements on the reliability of a power grid are higher and higher, and the comprehensive sensing and intelligent operation and maintenance management of the state of power equipment become an important means for improving the power supply reliability of a power distribution network and are key core business of power grid enterprises. However, the problem is still that the local overheating of the power equipment such as switches, knife switches and wire connection points caused by poor contact or overload is a main cause of fire and power failure accidents. The traditional manual inspection is low in efficiency and poor in real-time performance, and the existing wireless temperature measuring equipment has the problems that power supply is limited (such as depending on batteries or wiring), communication distance is short, a monitoring platform cannot be accessed and the like. In view of the above, it is necessary to provide a passive power-taking intelligent temperature measuring unit for electric equipment based on the internet of things to solve the above technical problems. Disclosure of Invention Based on the technical problems, the application provides the passive electricity taking intelligent temperature measuring unit for the power equipment based on the Internet of things. The application solves the problems existing in the prior art by adopting the technical scheme that: the application provides a passive electricity-taking intelligent temperature measuring unit for power equipment based on the Internet of things, which comprises the following components: The CT electricity taking unit is used for taking electricity on the power cable; The voltage conversion unit is connected with the CT electricity taking unit and used for converting the alternating current acquired by the CT electricity taking unit into direct current; The temperature sensor is connected with the voltage conversion unit and used for acquiring the temperature of the power cable; the communication unit is connected with the voltage conversion unit and the temperature sensor and is used for transmitting the temperature signal acquired by the temperature sensor to the signal processing unit; and the signal processing unit is used for amplifying the temperature signal transmitted by the received communication unit and transmitting the temperature signal to the singlechip. Preferably, the method comprises the steps of, The CT electricity taking unit is an open-close type current transformer. Preferably, the method comprises the steps of, The communication unit comprises a LoRa transmitting module and a LoRa receiving module. Preferably, the method comprises the steps of, The voltage conversion unit comprises an AC/DC rectifier bridge, and two input ends of the AC/DC rectifier bridge are respectively connected with two ends of the secondary side coil of the open-close type current transformer; one output end of the AC/DC rectifier bridge is connected with one end of the capacitor C and the input end of the filter circuit; The output end of the filter circuit is connected with the input end of the DC/DC unit; the output end of the DC/DC unit is electrically connected with the temperature sensor and the communication unit, and the temperature sensor is electrically connected with the communication unit; The other output end of the AC/DC rectifier bridge, the other end of the capacitor C, the grounding end of the filter circuit, the grounding end of the DC/DC unit, the grounding end of the temperature sensor and the grounding end of the LoRa transmitting module are connected with GND. Preferably, the method comprises the steps of, A smoothing reactor L is connected in series on a line, wherein one input end of the AC/DC rectifier bridge is connected with a secondary side coil of the open-close type current transformer. Preferably, the method comprises the steps of, A bleeder circuit is arranged between the AC/DC rectifier bridge and the filter circuit, the bleeder circuit comprises a voltage stabilizing diode VD, and the cathode of the voltage stabilizing diode VD is connected with one end of a capacitor C, one end of a discharge resistor RQ and the input end of the filter circuit; the anode of the voltage stabilizing diode VD is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with one