CN203151236U - Cable line arrester on-line monitoring system power supply - Google Patents
Cable line arrester on-line monitoring system power supply Download PDFInfo
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- CN203151236U CN203151236U CN2012205056758U CN201220505675U CN203151236U CN 203151236 U CN203151236 U CN 203151236U CN 2012205056758 U CN2012205056758 U CN 2012205056758U CN 201220505675 U CN201220505675 U CN 201220505675U CN 203151236 U CN203151236 U CN 203151236U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
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- 238000004146 energy storage Methods 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000012806 monitoring device Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 83
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Abstract
The utility model relates to a cable line arrester on-line monitoring system power supply. The power supply is characterized in that an energy taking coil T1 is sleeved on a cable metal sheath ground lead L1, two output ends of the energy taking coil is connected to a power supply input circuit; and power supply circuit output supplies power for a monitoring device, an inductor L2 is a cable line arrester ground lead, T2 is an arrester leakage current monitoring sensor, in a power circuit, the two output ends of the energy taking coil are connected to a one-phase bridge rectification and filtering circuit, rectification and filtering output are connected with a DC/DC voltage stabilizing circuit and a discharging protection loop, the DC/DC voltage stabilizing circuit is direct current conversion output, and provides stable direct current output, DC/DC voltage stabilizing circuit output is connected with a super-capacitance energy storage voltage stabilization output circuit, and the super-capacitance energy storage voltage stabilization output circuit provides instantaneous power output under a heavy load. Through a method of taking electricity by induction by the cable metal sheath ground lead, while reliably providing energy for the electronic monitoring device, the power supply can ensure reliable insulation to the ground, has the advantages of being simple, economical and reliable, and is suitable for outdoor cable line arrester on-line monitoring application occasions.
Description
Technical field
The utility model relates to a kind of cable line arrester on-line monitoring system power supply, belongs to power transmission and transforming equipment on-line monitoring technique field.
Background technology
Outdoor 66kV cable line lightning arrester is important overvoltage protection equipment, and its safety, stable operation are that electric power system provides safeguard.Along with lightning arrester put into operation the time growth with and products thereof the defective that exists, lightning arrester making moist under working voltage, problem of aging become increasingly conspicuous.For lightning arrester, because its fault progression speed is fast, traditional annual preventive trial can not be found its defective fully, must adopt on-line monitoring technique to grasp the operation conditions of lightning arrester, to guarantee its safe operation.
Owing to can not obtain power supply from the 66kV circuit, the on-line monitoring power supply is one of key issue that will solve, have 2 on the cable shaft tower with earth connection, one is the cable metal sheath earth connection, another is the arrester ground line, the cable metal sheath earth connection has bigger ground connection circulation (normally being more than the 10A)
Summary of the invention
The purpose of this utility model provides a kind of cable line lightning arrester monitoring power supply, it is by the mode of cable metal sheath earth connection induction power taking, power supply is when giving the reliable energy supply of electronic monitoring device, can guarantee reliable insulation over the ground, has simple, economic, reliable advantage, the application scenario of outdoor cable leakage conductor on-line monitoring.
The technical solution of the utility model is achieved in that cable line arrester on-line monitoring system power supply, it is characterized in that: get and to be sleeved on the cable metal sheath earth connection L1 by coil T1, pass through electromagnetic induction principle, by obtaining energy on the L1, get and to receive on the power supply input circuit by coil two outputs; Power circuit is output as the monitoring device power supply; inductance L 2 is cable line arrester ground line; T2 is the leakage current of an arrester monitoring sensor; in the power circuit; get and to receive single-phase bridge rectification by coil two outputs; on the filter circuit; rectification; filtering output connects the DC/DC voltage stabilizing circuit and releases the protection loop; release and protect the loop to bleed off the energy that produces because of big electric current; make it to be suitable for the needs of circuit; the DC/DC voltage stabilizing circuit is DC converting output; stable direct current output is provided, and the output of DC/DC voltage stabilizing circuit connects the super capacitor energy-storage voltage-stabilizing output circuit, the instantaneous power output when the super capacitor energy-storage voltage-stabilizing output circuit provides heavy load.
The alternating voltage that described single-phase bridge rectification, filter circuit will be got energy coil T1 generation carries out rectification, filtering, be made up of Transient Suppression Diode TVS1, rectifier diode D1 ~ D4, filter capacitor C1 ~ C3, resistance R 1, the two ends of wherein said Transient Suppression Diode TVS1 link to each other with Vin1-with input Vin1+ respectively; The negative pole of the positive pole of rectifier diode D1 and rectifier diode D4 is connected to input Vin1+ among rectifier diode D1 ~ D4, the negative pole of rectifier diode D2 links to each other with the positive pole of rectifier diode D3, receive input Vin1-, the negative pole of the negative pole of rectifier diode D1 and rectifier diode D3 is connected to the positive pole of filter capacitor C1, the positive pole of rectifier diode D2 links to each other with the positive pole of rectifier diode D4, receives the negative pole of filter capacitor C1; The two ends of resistance R 1 connect the positive pole of filter capacitor C1, filter capacitor C2 respectively; The end of filter capacitor C3 and the positive pole of filter capacitor C2 are connected to output Vout1+, and the negative pole of the other end of filter capacitor C3 and filter capacitor C1, filter capacitor C2 is connected to output Vout1-; Output end vo ut1+ and Vout1-meet input Vin2+ and the Vin2-in the protection loop of releasing respectively.
The described protective circuit of releasing is made up of high-power voltage stabilizing didoe D5 and pliotron Q1, wherein the collector electrode of the positive pole of voltage stabilizing didoe D5 and pliotron Q1 is connected to input Vin2+, the negative pole of voltage stabilizing didoe D5 links to each other with the base stage of pliotron Q1, and the emitter-base bandgap grading of pliotron Q1 links to each other with input Vin2-; Input Vin2+ receives the negative pole of rectifier diode D1 in single-phase bridge rectification, the filter circuit, rectifier diode D3, and input Vin2-receives the positive pole of rectifier diode D2 in single-phase bridge rectification, the filter circuit, rectifier diode D4.
Described DC/DC voltage stabilizing circuit is that the DC power supply of single-phase bridge rectification, filter circuit output is carried out voltage stabilizing, provide charging voltage and stabilized voltage power supply that burning voltage output is provided to the super capacitor energy-storage voltage-stabilizing output circuit, by low-power consumption, low-voltage landing DC/DC voltage stabilizing chip AMC34063A(U1), capacitor C 4 ~ C6, resistance R 3 ~ R5, inductance L 1, voltage stabilizing didoe D7, diode D8 forms, input Vin3+, Vin3-be output end vo ut1+ and the Vout1-of order phase bridge rectifier, filter circuit respectively, and Vout1-is as reference ground; 1 pin of voltage stabilizing chip U1,8 pin, 7 pin are connected to an end of resistance R 3,6 pin of voltage stabilizing chip U1 and the other end of resistance R 3, one end of capacitor C 4 is connected to input Vin3+, 5 pin of voltage stabilizing chip U1 and resistance R 4, the end of R5 links to each other, the other end ground connection of resistance R 5, the positive pole of the other end of resistance R 4 and diode D8, one end of capacitor C 6, one end of inductance L 1 links to each other, 2 pin of voltage stabilizing chip U1 and the negative pole of voltage stabilizing didoe, the other end of inductance L 1 connects, the plus earth of voltage stabilizing didoe, 3 pin of voltage stabilizing chip U1 are connected with an end of capacitor C 5, the other end ground connection of capacitor C 5, the 4 pin ground connection of voltage stabilizing chip U1, the other end of capacitor C 8 ground connection that links to each other with output end vo ut3-, another termination output end vo ut3+ of diode; Output end vo ut3+ links to each other with the input Vin4+ of super capacitor energy-storage voltage-stabilizing output circuit, and output end vo ut3-links to each other with the input Vin4-of super capacitor energy-storage voltage-stabilizing output circuit; Output end vo ut3+ is as the positive pole of stabilized voltage power supply, and Vout3-is as the negative pole of stabilized voltage power supply.
The super capacitor energy-storage voltage-stabilizing output circuit, formed by super capacitor C6, super capacitor C7 and voltage stabilizing didoe D9, voltage stabilizing didoe D10, wherein the negative pole of the positive pole of super capacitor C7 and voltage stabilizing didoe D9 is connected to input Vout4+, the negative pole of the positive pole of the positive pole of the negative pole of super capacitor C7, voltage stabilizing didoe D9, super capacitor C8, voltage stabilizing didoe D10 connects, and the positive pole of the negative pole of super capacitor C8 and voltage stabilizing didoe D10 is connected to input Vout4-.
Good effect of the present utility model is its mode of passing through the adjacent cable metal sheath earth connection induction power taking of cable line arrester ground line, realization is powered to the lightning arrester on-Line Monitor Device, employing suit on the metallic sheath earth connection is got and can be responded to alternating voltage by coil, output DC source after over commutation, filtering, voltage stabilizing then, power supply is when giving the reliable energy supply of electronic monitoring device, can guarantee reliable insulation over the ground, have simple, economic, reliable advantage.
Description of drawings
Fig. 1 is theory diagram of the present utility model.
Fig. 2 current rectifying and wave filtering circuit.
Fig. 3 supply unit leadage circuit.
Fig. 4 supply unit DC/DC translation circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described: cable line arrester on-line monitoring system power supply, it is characterized in that: get and to be sleeved on the cable metal sheath earth connection L1 by coil T1, pass through electromagnetic induction principle, by obtaining energy on the L1, two outputs are received on the power supply processing circuit.Power circuit output is connected on the monitoring system device, and L2 is cable line arrester ground line, and T2 is the leakage current of an arrester monitoring sensor, on the power circuit output connection monitoring system device.
The alternating voltage that single-phase bridge rectification, filter circuit will be got the generation of energy instrument transformer as shown in Figure 2 carries out rectification, filtering, is made up of Transient Suppression Diode TVS1, rectifier diode D1 ~ D4, filter capacitor C1 ~ C3, resistance R 1.The two ends of described Transient Suppression Diode TVS1 respectively with input Vin1+ and Vin1-; Described rectifier diode D1 ~ D4, the positive pole of D1 and the negative pole of D4 are connected to input Vin1+, the negative pole of D2 links to each other with the positive pole of D3, receive input Vin1-, the negative pole of D1 and the negative pole of D3 are connected to the positive pole of filter capacitor C1, the positive pole of D2 links to each other with the positive pole of D4, receives the negative pole of filter capacitor C1; The two ends of resistance R 1 connect the positive pole of filter capacitor C1, C2 respectively; One end of capacitor C 3 and the positive pole of capacitor C 2 are connected to output Vout1+, and the negative pole of the other end of capacitor C 3 and capacitor C 1, C2 is connected to output Vout1-; Output end vo ut1+ and Vout1-meet input Vin2+ and the Vin2-in bleed off protection loop (referring to Fig. 3) respectively.
Bleed off protection loop as shown in Figure 3; the output voltage instantaneous value of getting the energy instrument transformer is limited in certain scope; when the power cable primary current increases, get energy instrument transformer secondary side current loop stream mistake thus, guarantee that stabilized voltage power supply of the present invention has very wide working range.Formed by high-power voltage stabilizing didoe D5 and pliotron Q1, the positive pole of described voltage stabilizing didoe D5 and the collector electrode of pliotron are connected to input Vin2+, the negative pole of voltage stabilizing didoe D5 links to each other with the base stage of pliotron Q1, and the emitter-base bandgap grading of pliotron links to each other with input Vin2-; Input Vin2+ receives the negative pole of diode D1, D3 in single-phase bridge rectification, the filter circuit (referring to Fig. 2), and input Vin2-receives the positive pole of diode D2, D4 in single-phase bridge rectification, the filter circuit (referring to Fig. 2).
The DC/DC voltage stabilizing circuit as shown in Figure 4, be to single-phase bridge rectification, filter circuit as shown in Figure 2, the DC power supply of output is carried out voltage stabilizing, provide charging voltage and stabilized voltage power supply that burning voltage output is provided to the super capacitor energy-storage voltage-stabilizing output circuit, by low-power consumption, low-voltage landing DC/DC voltage stabilizing chip AMC34063A(U1), capacitor C 4 ~ C6, resistance R 3 ~ R5, inductance L 1, voltage stabilizing didoe D7, diode D8 forms, input Vin3+, Vin3-is order phase bridge rectifier respectively, filter circuit output end vo ut1+ and Vout1-as shown in Figure 2, Vout1-is as reference ground; 1 pin of voltage stabilizing chip U1,8 pin, 7 pin are connected to an end of resistance R 3,6 pin of U1 and the other end of R3, one end of capacitor C 4 is connected to input Vin3+, 5 pin of U1 and resistance R 4, the end of R5 links to each other, the other end ground connection of R5, the positive pole of the other end of R4 and diode D8, one end of capacitor C 6, one end of inductance L 1 links to each other, 2 pin of U1 and the negative pole of voltage stabilizing didoe, the other end of inductance L 1 connects, the plus earth of voltage stabilizing didoe, 3 pin of U1 are connected with an end of capacitor C 5, the other end ground connection of capacitor C 5, the 4 pin ground connection of U1, the other end of capacitor C 8 ground connection that links to each other with output end vo ut3-, another termination output end vo ut3+ of diode.Output end vo ut3+ links to each other with the input Vin4+ of super capacitor energy-storage voltage-stabilizing output circuit, and output end vo ut3-links to each other with the input Vin4-of super capacitor energy-storage voltage-stabilizing output circuit.Output end vo ut3+ is as the positive pole of stabilized voltage power supply, and Vout3-is as the negative pole of stabilized voltage power supply.
The super capacitor energy-storage voltage-stabilizing output circuit can be applicable to stabilized voltage power supply of the present invention to have the monitoring system of moment high power module such as GSM/GPRS.Formed by super capacitor C6, C7 and voltage stabilizing didoe D9, D10, the negative pole of the positive pole of described super capacitor C7 and voltage stabilizing didoe D9 is connected to input Vout4+, the negative pole of the positive pole of the positive pole of the negative pole of super capacitor C7, voltage stabilizing didoe D9, super capacitor C8, voltage stabilizing didoe D10 connects, and the positive pole of the negative pole of super capacitor C8 and voltage stabilizing didoe D10 is connected to input Vout4-.Utilize the technical characterstic of super capacitor to realize the fast charging and discharging of big electric current.
The course of work is described: L1, L2 are 2 adjacent earth connections of outdoor cable circuit, L1 is metallic sheath circulation earth connection, L2 is the arrester ground line, outdoor cable leakage conductor monitoring device power supply is difficult to obtain voltage from cable, utilize electric current (more than the general 10A) induction on the L1 to obtain energy, through after the conversion process, output is stablized direct voltage and is the power supply of lightning arrester monitoring device.
Be sleeved on the alternating voltage of getting energy coil T1 induction on the L1, through one of output behind the rectifying and wave-filtering with the power on direct voltage of rheologyization of L1, the voltage of output can be very high when electric current is big, the input range that can exceed DC/DC bleeds off unnecessary energy through leadage circuit, when Vin2 voltage is higher, voltage-stabiliser tube D5 punctures, voltage-stabiliser tube D5 parameter is for allowing the magnitude of voltage of DC/DC input, and Q1 work releases energy, guarantees the DC/DC input voltage in allowed limits.DC/DC is low power consumption voltage landing voltage stabilizing chip, export stable 3.3V direct voltage, because monitoring device has communication transceiving circuit, moment has the circuit of forward of big electric current (about 500mA) to have bigger voltage fluctuation, add the super capacitor circuit, utilize the characteristic of super capacitor, than heavy load the time, provide energy output by super capacitor.
Claims (4)
1. cable line arrester on-line monitoring system power supply, it is characterized in that: get and to be sleeved on the cable metal sheath earth connection inductance L 1 by coil T1, by electromagnetic induction principle, by obtaining energy on the inductance L 1, get and to receive on the power supply input circuit by coil two outputs; Power circuit is output as the monitoring device power supply; inductance L 2 is cable line arrester ground line; T2 is the leakage current of an arrester monitoring sensor; in the power circuit; get and to receive single-phase bridge rectification by coil two outputs; on the filter circuit; rectification; filtering output connects the DC/DC voltage stabilizing circuit and releases the protection loop; release and protect the loop to bleed off the energy that produces because of big electric current; make it to be suitable for the needs of circuit; the DC/DC voltage stabilizing circuit is DC converting output; stable direct current output is provided, and the output of DC/DC voltage stabilizing circuit connects the super capacitor energy-storage voltage-stabilizing output circuit, the instantaneous power output when the super capacitor energy-storage voltage-stabilizing output circuit provides heavy load.
2. according to the cable line arrester on-line monitoring system power supply described in the claim 1, it is characterized in that described single-phase bridge rectification, filter circuit will get can coil the alternating voltage that produces of T1 carry out rectification, filtering, be made up of Transient Suppression Diode TVS1, rectifier diode D1 ~ D4, filter capacitor C1 ~ C3, resistance R 1, the two ends of wherein said Transient Suppression Diode TVS1 link to each other with Vin1-with input Vin1+ respectively; The negative pole of the positive pole of rectifier diode D1 and rectifier diode D4 is connected to input Vin1+ among rectifier diode D1 ~ D4, the negative pole of rectifier diode D2 links to each other with the positive pole of rectifier diode D3, receive input Vin1-, the negative pole of the negative pole of rectifier diode D1 and rectifier diode D3 is connected to the positive pole of filter capacitor C1, the positive pole of rectifier diode D2 links to each other with the positive pole of rectifier diode D4, receives the negative pole of filter capacitor C1; The two ends of resistance R 1 connect the positive pole of filter capacitor C1, filter capacitor C2 respectively; The end of filter capacitor C3 and the positive pole of filter capacitor C2 are connected to output Vout1+, and the negative pole of the other end of filter capacitor C3 and filter capacitor C1, filter capacitor C2 is connected to output Vout1-; Output end vo ut1+ and Vout1-meet input Vin2+ and the Vin2-in the protection loop of releasing respectively.
3. according to the cable line arrester on-line monitoring system power supply described in the claim 1, it is characterized in that the described protective circuit of releasing is made up of high-power voltage stabilizing didoe D5 and pliotron Q1, wherein the collector electrode of the positive pole of voltage stabilizing didoe D5 and pliotron Q1 is connected to input Vin2+, the negative pole of voltage stabilizing didoe D5 links to each other with the base stage of pliotron Q1, and the emitter-base bandgap grading of pliotron Q1 links to each other with input Vin2-; Input Vin2+ receives the negative pole of rectifier diode D1 in single-phase bridge rectification, the filter circuit, rectifier diode D3, and input Vin2-receives the positive pole of rectifier diode D2 in single-phase bridge rectification, the filter circuit, rectifier diode D4.
4. according to the cable line arrester on-line monitoring system power supply described in the claim 1, it is characterized in that described DC/DC voltage stabilizing circuit is to single-phase bridge rectification, the DC power supply of filter circuit output is carried out voltage stabilizing, provide charging voltage and stabilized voltage power supply that burning voltage output is provided to the super capacitor energy-storage voltage-stabilizing output circuit, by low-power consumption, low-voltage landing DC/DC voltage stabilizing chip AMC34063A(U1), capacitor C 4 ~ C6, resistance R 3 ~ R5, inductance L 1, voltage stabilizing didoe D7, diode D8 forms, input Vin3+, Vin3-is order phase bridge rectifier respectively, output end vo ut1+ and the Vout1-of filter circuit, Vout1-is as reference ground; 1 pin of voltage stabilizing chip U1,8 pin, 7 pin are connected to an end of resistance R 3,6 pin of voltage stabilizing chip U1 and the other end of resistance R 3, one end of capacitor C 4 is connected to input Vin3+, 5 pin of voltage stabilizing chip U1 and resistance R 4, the end of R5 links to each other, the other end ground connection of resistance R 5, the positive pole of the other end of resistance R 4 and diode D8, one end of capacitor C 6, one end of inductance L 1 links to each other, 2 pin of voltage stabilizing chip U1 and the negative pole of voltage stabilizing didoe, the other end of inductance L 1 connects, the plus earth of voltage stabilizing didoe, 3 pin of voltage stabilizing chip U1 are connected with an end of capacitor C 5, the other end ground connection of capacitor C 5, the 4 pin ground connection of voltage stabilizing chip U1, the other end of capacitor C 8 ground connection that links to each other with output end vo ut3-, another termination output end vo ut3+ of diode; Output end vo ut3+ links to each other with the input Vin4+ of super capacitor energy-storage voltage-stabilizing output circuit, and output end vo ut3-links to each other with the input Vin4-of super capacitor energy-storage voltage-stabilizing output circuit; Output end vo ut3+ is as the positive pole of stabilized voltage power supply, and Vout3-is as the negative pole of stabilized voltage power supply; The super capacitor energy-storage voltage-stabilizing output circuit, formed by super capacitor C6, super capacitor C7 and voltage stabilizing didoe D9, voltage stabilizing didoe D10, wherein the negative pole of the positive pole of super capacitor C7 and voltage stabilizing didoe D9 is connected to input Vout4+, the negative pole of the positive pole of the positive pole of the negative pole of super capacitor C7, voltage stabilizing didoe D9, super capacitor C8, voltage stabilizing didoe D10 connects, and the positive pole of the negative pole of super capacitor C8 and voltage stabilizing didoe D10 is connected to input Vout4-.
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| CN2012205056758U CN203151236U (en) | 2012-09-29 | 2012-09-29 | Cable line arrester on-line monitoring system power supply |
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| CN2012205056758U CN203151236U (en) | 2012-09-29 | 2012-09-29 | Cable line arrester on-line monitoring system power supply |
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| CN103605045A (en) * | 2013-11-01 | 2014-02-26 | 航天科工深圳（集团）有限公司 | Power transmission line fault detection device |
| CN104734497A (en) * | 2015-04-03 | 2015-06-24 | 四川蓝讯宝迩电子科技有限公司 | Power source of lightning arrester on-line monitoring system |
| CN105278483A (en) * | 2014-07-15 | 2016-01-27 | 李利民 | Surge monitoring device for SPD, intelligent SPD and surge protection system |
| CN108548615A (en) * | 2018-04-17 | 2018-09-18 | 安徽合电正泰电气成套设备有限公司 | Watchband type passive wireless temperature measuring device |
| CN108594038A (en) * | 2018-04-04 | 2018-09-28 | 南京世都科技有限公司 | Arrester monitoring system |
| CN108599348A (en) * | 2018-07-10 | 2018-09-28 | 广东电网有限责任公司 | Substation ground network electric energy recovering system |
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| CN109428502A (en) * | 2017-08-22 | 2019-03-05 | 许继集团有限公司 | A kind of electricity getting device and method of cable sheath earthed system |
| CN110286293A (en) * | 2019-07-25 | 2019-09-27 | 云南电网有限责任公司电力科学研究院 | A kind of self-energizing electric leakage monitoring method and system based on leakage current |
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| CN105278483A (en) * | 2014-07-15 | 2016-01-27 | 李利民 | Surge monitoring device for SPD, intelligent SPD and surge protection system |
| CN105278483B (en) * | 2014-07-15 | 2018-07-06 | 李利民 | Surge monitoring device, intelligence SPD and surge protection system for SPD |
| CN104734497A (en) * | 2015-04-03 | 2015-06-24 | 四川蓝讯宝迩电子科技有限公司 | Power source of lightning arrester on-line monitoring system |
| CN104734497B (en) * | 2015-04-03 | 2018-05-22 | 宁夏中科天际防雷股份有限公司 | Arrester online monitoring system power supply |
| CN109428502A (en) * | 2017-08-22 | 2019-03-05 | 许继集团有限公司 | A kind of electricity getting device and method of cable sheath earthed system |
| CN109428502B (en) * | 2017-08-22 | 2020-11-17 | 许继集团有限公司 | Power taking device and method for cable sheath grounding system |
| CN108594038A (en) * | 2018-04-04 | 2018-09-28 | 南京世都科技有限公司 | Arrester monitoring system |
| CN108548615A (en) * | 2018-04-17 | 2018-09-18 | 安徽合电正泰电气成套设备有限公司 | Watchband type passive wireless temperature measuring device |
| CN108599348A (en) * | 2018-07-10 | 2018-09-28 | 广东电网有限责任公司 | Substation ground network electric energy recovering system |
| CN109186796A (en) * | 2018-10-15 | 2019-01-11 | 江苏久创电气科技有限公司 | A kind of CT formula passive wireless temperature measuring device applied to switchgear |
| CN110286293A (en) * | 2019-07-25 | 2019-09-27 | 云南电网有限责任公司电力科学研究院 | A kind of self-energizing electric leakage monitoring method and system based on leakage current |
| CN110286294A (en) * | 2019-07-25 | 2019-09-27 | 云南电网有限责任公司电力科学研究院 | A kind of self-energizing device and method for monitoring of leaking electricity |
| CN111555426A (en) * | 2020-05-22 | 2020-08-18 | 东北电力大学 | Comprehensive energy-taking module for monitoring overhead line of power distribution network |
| CN112748273A (en) * | 2020-12-29 | 2021-05-04 | 广东电网有限责任公司电力科学研究院 | Real-time voltage monitoring circuit for discharge coil of high-voltage parallel capacitor bank |
| CN113589021A (en) * | 2021-07-19 | 2021-11-02 | 武汉三相电力科技有限公司 | Electricity taking system and method for three-core cable |
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