CN206193157U - Fault indicator and distribution lines fault location system suitable for low temperature environment - Google Patents
Fault indicator and distribution lines fault location system suitable for low temperature environment Download PDFInfo
- Publication number
- CN206193157U CN206193157U CN201621279565.9U CN201621279565U CN206193157U CN 206193157 U CN206193157 U CN 206193157U CN 201621279565 U CN201621279565 U CN 201621279565U CN 206193157 U CN206193157 U CN 206193157U
- Authority
- CN
- China
- Prior art keywords
- voltage
- battery
- output end
- microprocessor
- low temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model provides a fault indicator and distribution lines fault location system suitable for low temperature environment, fault indicator include microprocessor, distribution lines current transformer, tertiary power supply unit and local wireless transceiver, the one -level power adopts gets electric CT circuit, and the second grade power adopts super capacitor, and tertiary power adopts the lithium cell. The advantage does: fault indicator adopts tertiary mains operated, through mutually supporting of tertiary power, whether have according to distribution lines, whether electric capacity has the condition such as electricity, can seamlessly automatically switch between various powers, and, the one -level power is the main power source, the second grade power is secondary source, tertiary battery supply is last optional power, reduce the frequency of utilization of battery as far as possible, the life of extension battery, ensure the all -weather long -time reliability service of fault indicator, and then guarantee to carry out effectively control location to the distribution lines trouble. Consequently, furthermore,
Description
Technical field
The utility model belongs to distribution line failure field of locating technology, and in particular to a kind of event suitable for low temperature environment
Barrier indicator and fault location system for distribution lines.
Background technology
For transmission range farther out, the with a varied topography, distribution line that natural environment and climate condition is poor on the way, along with power supply
The fluctuation of pressure, causes distribution line failure rate to raise, and difficulty increase is made an inventory and investigated to failure.How fast and effectively to distribution
Line fault is positioned, and is one of important content of Electric Power Service in High so as to reduce troubleshooting time.
For traditional fault location system, including fault detector, fault detector sets as system front end collection
Standby, its reliability directly concerns a whole set of alignment system stability.And the fault detector of traditional design, supplied only with battery
Electricity, and due to being influenceed by battery material, in subzero more than 30 degree of environment, battery capacity can diminish, the electricity that capacity diminishes
Pond is difficult to be powered long lasting for fault detector, so as to easily cause fault detector failure, directly results in fault location system
System paralysis, it is impossible to positioned to distribution line failure.
It can be seen that, traditional fault location system is not suitable for being used in the low temperature environments such as Xinjiang, the Inner Mongol and northeast,
With larger use limitation.
Utility model content
For the defect that prior art is present, the utility model provide a kind of fault detector suitable for low temperature environment and
Fault location system for distribution lines, can effectively solve the above problems.
The technical solution adopted in the utility model is as follows：
The utility model provides a kind of fault detector suitable for low temperature environment, including microprocessor, distribution line electricity
Current transformer, three-level power supply unit and local wireless transceiver；
The three-level power supply unit includes primary power source, secondary power supply and three stage power source；Wherein, the primary power source is used
Power taking CT circuits, the power taking CT circuits are used to sense distribution line current information, and there is the power taking CT circuits power supply to export
Terminal and current signal output end；After the power supply lead-out terminal sequentially passes through rectification circuit, mu balanced circuit, the 2nd diode,
It is connected to the 1st input terminal of voltage stabilizing chip；The lead-out terminal of the voltage stabilizing chip is connected to the energization input of microprocessor；
After current signal output end sequentially passes through signal conditioning circuit and line current signal A/D sample circuits, institute is connected to
The signal input part of microprocessor is stated, so as to be used to transmit distribution line current signal to microprocessor；
The secondary power supply uses super capacitor；The input of the super capacitor is by after charge protector, connecting
To the output end of the mu balanced circuit；The output end of the super capacitor is by after charge/discharge control circuit, being connected to the voltage stabilizing
The output end of chip is on the circuit between the input of the microprocessor；The super capacitor is parallel with super for gathering
The capacitance voltage A/D sample circuits of capacitance voltage signal；The output end of the capacitance voltage A/D sample circuits is connected to described micro-
The collection terminal of processor；The charge protector and the charge/discharge control circuit are all connected to the control of the microprocessor
End；
The three stage power source uses battery, and the output end of the battery is by after the 1st diode, being connected to the voltage stabilizing core
2nd input terminal of piece；
The current transformer for gathering distribution line current value is installed in distribution line；The output of the current transformer
End is connected to the signal input part of the microprocessor；The microprocessor is also connected with the local wireless transceiver.
Preferably, the battery uses lithium battery.
Preferably, magnitude of voltage of the battery voltage value of the battery less than the circuit output end of pressure-stabilizing.
Preferably, it is the battery of 3.6V that the battery uses cell voltage；The mu balanced circuit uses output end voltage value
It is the circuit of 5V.
Preferably, the 1st diode and the 2nd diode use forward voltage drop identical diode, its forward direction pressure
Drop is 0.2V.
Preferably, it is the super electric capacity of U1 that the super capacitor uses magnitude of voltage when completely filling；The voltage stabilizing chip is using defeated
Go out the voltage stabilizing chip that terminal voltage value is U2, also, U1 is more than U2.
Preferably, U1 is 3.6V；U2 is 3.1V.
Preferably, the mu balanced circuit uses mu balanced circuit overvoltage crowbar.
The utility model also provides a kind of distribution line failure of the above-mentioned fault detector suitable for low temperature environment of application
Alignment system, including fault detector, communicating terminal and main station system；The fault detector passes through the communicating terminal and institute
State main station system communication connection.
Preferably, the communicating terminal is configured with back-up source and main power source；The back-up source stores for low form plumbic acid
Battery；The main power source is solar cell.
The fault detector and fault location system for distribution lines suitable for low temperature environment that the utility model is provided have
Advantages below：
Fault detector is powered using three stage power source, also, one-level power taking CT circuits are powered as main power source, and is only worked as
When distribution line has a power failure, just powered using two grades of super capacitors；When one-level power taking CT circuits and two grades of super capacitors fail,
Three-level battery can be just enabled to power.As can be seen here, three-level battery only has can just use in extreme circumstances, and frequency of use is relatively low,
Therefore, battery capacity in low temperature use environment had both been made equally to diminish, it is also possible to use for a long time.
Whether the mutual cooperation that the utility model passes through three stage power source, have whether electricity, electric capacity have electricity etc. according to distribution line
Situation, can automatic seamless switch between various power supplys, as far as possible reduce battery frequency of use, extend the use longevity of battery
Life, it can be ensured that the round-the-clock long-time reliability service of fault detector, and then guarantee carries out effective monitoring to distribution line failure
Positioning.Therefore, the utility model is particularly well-suited to the low temperature use environment such as Xinjiang, the Inner Mongol and northeast.
Brief description of the drawings
The principle schematic diagram. of the fault detector suitable for low temperature environment that Fig. 1 is provided for the utility model.
Specific embodiment
In order that technical problem, technical scheme and beneficial effect that the utility model is solved become more apparent, below
With reference to drawings and Examples, the utility model is further elaborated.It should be appreciated that specific implementation described herein
Example is only used to explain the utility model, is not used to limit the utility model.
With reference to Fig. 1, the utility model provides a kind of fault detector suitable for low temperature environment, including microprocessor, matches somebody with somebody
Electric line current transformer, three-level power supply unit and local wireless transceiver；
The three-level power supply unit includes primary power source, secondary power supply and three stage power source；Wherein, the primary power source is used
Power taking CT circuits, the power taking CT circuits are used to sense distribution line current information, and there is the power taking CT circuits power supply to export
Terminal and current signal output end；After the power supply lead-out terminal sequentially passes through rectification circuit, mu balanced circuit, the 2nd diode,
It is connected to the 1st input terminal of voltage stabilizing chip；Wherein, mu balanced circuit uses mu balanced circuit overvoltage crowbar；The voltage stabilizing core
The lead-out terminal of piece is connected to the energization input of microprocessor；Current signal output end sequentially passes through signal condition electricity
Behind road and line current signal A/D sample circuits, the signal input part of the microprocessor is connected to, so as to be used for microprocessor
Device transmits distribution line current signal；
The secondary power supply uses super capacitor；The input of the super capacitor is by after charge protector, connecting
To the output end of the mu balanced circuit；The output end of the super capacitor is by after charge/discharge control circuit, being connected to the voltage stabilizing
The output end of chip is on the circuit between the input of the microprocessor；The super capacitor is parallel with super for gathering
The capacitance voltage A/D sample circuits of capacitance voltage signal；The output end of the capacitance voltage A/D sample circuits is connected to described micro-
The collection terminal of processor；The charge protector and the charge/discharge control circuit are all connected to the control of the microprocessor
End；
The three stage power source uses battery, and the output end of the battery is by after the 1st diode, being connected to the voltage stabilizing core
2nd input terminal of piece；
The current transformer for gathering distribution line current value is installed in distribution line；The output of the current transformer
End is connected to the signal input part of the microprocessor；The microprocessor is also connected with the local wireless transceiver.
In practical application, each equipment choosing meets equipment claimed below：
(1) battery uses lithium battery.
(2) magnitude of voltage of the battery voltage value of battery less than the circuit output end of pressure-stabilizing.For example, battery is using battery electricity
Press the battery for 3.6V；It is the circuit of 5V that mu balanced circuit uses output end voltage value.
(3) the 1st diodes and the 2nd diode use forward voltage drop identical diode, and its forward voltage drop is
0.2V。
(4) it is the super electric capacity of U1 that super capacitor uses magnitude of voltage when completely filling；The voltage stabilizing chip uses output end voltage
It is worth the voltage stabilizing chip for U2, also, U1 is more than U2.For example, U1 is 3.6V；U2 is 3.1V.
The fault detector suitable for low temperature environment that the utility model is provided, its power supply uses triple layer designs frame
Structure, can realize seamless switching of the equipment between three kinds of power supplys, also ensure that equipment also can be normal in the case of extremely low temperature
Work.
With use cell voltage be as the lithium battery of 3.6V, forward voltage drop 0.2V the 1st diode and the 2nd diode,
As a example by magnitude of voltage is for super capacitor, the voltage stabilizing chip that output end voltage value is 3.1V of 3.6V when completely filling, fault detector is introduced
A kind of concrete operating principle：
(1) microprocessor is by distribution line current transformer real-time detection to distribution line current value；Meanwhile, by electricity
Hold voltage A/D sample circuits, the magnitude of voltage of real-time detection super capacitor；
(2) if detecting distribution line has electric current, now, microprocessor is controlled by charge/discharge control circuit
System, makes super capacitor not discharge, that is, make super capacitor not to microprocessor power supply；
And power taking CT circuit inductances are to distribution line current value, by rectification circuit, mu balanced circuit, the 2nd diode, voltage stabilizing
After chip, directly to microprocessor power supply；And in this case, battery does not work；
Herein, the reason for power taking CT circuits are not powered to microprocessor power supply, and battery be：
In the utility model, circuit output end of pressure-stabilizing voltage is 5V, and the pressure drop of the 2nd diode is 0.2V, therefore, the 2nd two
Pole pipe output end voltage is 4.8V；Now the 2nd diode is conducting state；
The input of voltage stabilizing chip is connected in parallel on due to the output end of the 1st diode and the 2nd diode again, therefore, the 1st two pole
Pipe is identical with the output end voltage value of the 2nd diode；So, the 1st diode output voltage is 4.8V；Again due to lithium battery
It is 3.6V to press, so, the 1st diode input terminal voltage is 3.6V, it is seen then that the 1st diode input terminal voltage is less than the 1st diode
Output end voltage, therefore, the 1st diode is now cut-off state.
(3) during power taking CT circuits are to microprocessor power supply, if the microprocessor detects that the voltage of super capacitor
Value is too low, then need to be charged to super capacitor using the one part of current of power taking CT circuit outputs, and concrete methods of realizing is：
When microprocessor detects distribution line load current reaches 2A, charge protector is opened, to super capacitor
Charge, after super capacitor charges, the system power supply after having a power failure as distribution line.
(4) if detecting distribution line does not exist electric current, i.e.,：Generation distribution line power failure phenomenon, now, distinguishes following
Two kinds of situations：
(the first situation) can make microprocessor if microprocessor need not upload distribution current signal to main station system
In a dormant state, it is only battery-powered.
In the present case, as long as microprocessor does not start super capacitor, super capacitor is not used to microprocessor power supply, then
System automatic seamless is switched to battery-powered state, and reason is：
When distribution line has a power failure, the 2nd diode does not have electric current to pass through, and cut-off state is switched to naturally；And for the 1st two pole
Pipe, its cathode voltage is equal to lithium battery voltage, is 3.6V, by after 0.2V pressure drops, the 1st diode cathode voltage is 3.4V, because
This, the 1st diode cathode voltage is higher than cathode voltage, and the 1st diode switchs to conducting state, from battery to microprocessor power supply.
Microprocessor power consumption is very low during due to resting state, and lithium battery can power for a long time.
(second situation) needs to upload distribution current signal to main station system when microprocessor, due to now microprocessor
Power consumption is very high, therefore, lithium battery service life can be influenceed using lithium battery power supply, so, microprocessor starts super capacitor,
Using super capacitor to microprocessor power supply.
During this situation, when super capacitor is started, when making it to microprocessor power supply, the 1st diode of battery series connection is automatic
Switch to cut-off state, will not continue to microprocessor power supply, reason is：
When start super capacitor power when, due to super capacitor full of voltage be 3.6V, and super capacitor output termination
To the output end of voltage stabilizing chip, so, the output end voltage of voltage stabilizing chip is equal to super-capacitor voltage, is 3.6V；And voltage stabilizing core
Piece normal working voltage is only 3.1V, less than 3.6V, so, when super capacitor works, voltage stabilizing chip is in cut-off and does not work
State, thus necessarily causes the 1st diode and the 2nd diode to be in cut-off state, so, battery will not be supplied to microprocessor
Electricity.
As super capacitor continues to microprocessor power supply, causing the voltage of super capacitor gradually reduces, and works as super capacitor
Voltage when falling below voltage stabilizing chip operating voltage 3.1V, on the one hand, super capacitor has been approached and has discharged electricity condition, now, control
Super capacitor processed does not continue to electric discharge；On the other hand, now, voltage stabilizing chip is no longer on cut-off state, therefore, the 1st diode
Automatic conducting, makes battery continue to microprocessor power supply.So design the reason for be：Because the electricity of super capacitor is limited, when
The electricity of super capacitor is approached when using up, to avoid microprocessor from being worked due to short of electricity, so being supplied automatically using battery
Electricity, keeps the reliability and stability of microprocessor work.
As can be seen here, the fault detector suitable for low temperature environment that the utility model is provided, is powered using three stage power source,
Also, according to distribution line whether have electricity, electric capacity whether have electricity situations such as, can automatic seamless switch between various power supplys.It is former
It is then：When distribution line has electricity, powered by CT power-supply circuits；When primary current is minimum, powered as power supply by super capacitor,
Ensure that fault message is reported in time；In extreme circumstances, after primary power source and secondary power supply fail, by lithium battery as most
Guarantee afterwards, it is ensured that fault detector can be with round-the-clock reliability service.
In addition, when primary current reaches 2A, being powered by CT power-supply circuits, the operation of battery global function can be exempted from；Secondary power supply
Using super capacitor, subzero 30 degree of reliability can be met and used, 40 degrees below zero is not damaged；Due to only just enabling electricity in extreme case
Pond powers, so, battery frequency of use and use time are prevented effectively from, extend the service life of battery.
The utility model also provides a kind of distribution line failure of the above-mentioned fault detector suitable for low temperature environment of application
Alignment system, including fault detector, communicating terminal and main station system；The fault detector passes through the communicating terminal and institute
State main station system communication connection.Wherein, communicating terminal is configured with back-up source and main power source；The back-up source is low form lead
Acid accumulator；The main power source is solar cell.Using low form lead-acid accumulator collocation big-power solar battery mode,
Can ensure that communicating terminal also can reliability service under extremely low temperature.
Specifically, the fault detector with communication function with three be one group, every is separately mounted to A, B, C three-phase power
On line, fault detector is arranged on distribution line in units of group, CT output current signals are sampled through signal condition, A/D
Feeding microprocessor is calculated afterwards, and fault-signal is sent to local wireless transceiver by microprocessor, then by communicating terminal
Reach main website.
Communicating terminal transmits the electric field letter of circuit telemetry and reflecting voltage change in addition to fault message is transmitted, also
Breath, while receiving control information of the main website to indicator reproduction.
The fault detector and fault location system for distribution lines suitable for low temperature environment that the utility model is provided have
Advantages below：
Fault detector is powered using three stage power source, also, one-level power taking CT circuits are powered as main power source, and is only worked as
When distribution line has a power failure, just powered using two grades of super capacitors；When one-level power taking CT circuits and two grades of super capacitors fail,
Three-level battery can be just enabled to power.As can be seen here, three-level battery only has can just use in extreme circumstances, and frequency of use is relatively low,
Therefore, battery capacity in low temperature use environment had both been made equally to diminish, it is also possible to use for a long time.
Whether the mutual cooperation that the utility model passes through three stage power source, have whether electricity, electric capacity have electricity etc. according to distribution line
Situation, can automatic seamless switch between various power supplys, as far as possible reduce battery frequency of use, extend the use longevity of battery
Life, it can be ensured that the round-the-clock long-time reliability service of fault detector, and then guarantee carries out effective monitoring to distribution line failure
Positioning.Therefore, the utility model is particularly well-suited to the low temperature use environment such as Xinjiang, the Inner Mongol and northeast.
The above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching should also regard protection domain of the present utility model.
Claims (10)
1. a kind of fault detector suitable for low temperature environment, it is characterised in that including microprocessor, distribution line Current Mutual Inductance
Device, three-level power supply unit and local wireless transceiver；
The three-level power supply unit includes primary power source, secondary power supply and three stage power source；Wherein, the primary power source uses power taking
CT circuits, the power taking CT circuits are used to sense distribution line current information, and the power taking CT circuits have power supply lead-out terminal
With current signal output end；After the power supply lead-out terminal sequentially passes through rectification circuit, mu balanced circuit, the 2nd diode, connection
To the 1st input terminal of voltage stabilizing chip；The lead-out terminal of the voltage stabilizing chip is connected to the energization input of microprocessor；It is described
After current signal output end sequentially passes through signal conditioning circuit and line current signal A/D sample circuits, it is connected to described micro-
The signal input part of processor, so as to be used to transmit distribution line current signal to microprocessor；
The secondary power supply uses super capacitor；The input of the super capacitor is by after charge protector, being connected to institute
State the output end of mu balanced circuit；The output end of the super capacitor is by after charge/discharge control circuit, being connected to the voltage stabilizing chip
Output end on the circuit between the input of the microprocessor；The super capacitor is parallel with for gathering super capacitor
The capacitance voltage A/D sample circuits of voltage signal；The output end of the capacitance voltage A/D sample circuits is connected to the microprocessor
The collection terminal of device；The charge protector and the charge/discharge control circuit are all connected to the control end of the microprocessor；
The three stage power source uses battery, and the output end of the battery is by after the 1st diode, being connected to the voltage stabilizing chip
2nd input terminal；
The current transformer for gathering distribution line current value is installed in distribution line；The output end of the current transformer connects
It is connected to the signal input part of the microprocessor；The microprocessor is also connected with the local wireless transceiver.
2. the fault detector suitable for low temperature environment according to claim 1, it is characterised in that the battery uses lithium
Battery.
3. the fault detector suitable for low temperature environment according to claim 1, it is characterised in that the battery of the battery
Magnitude of voltage of the magnitude of voltage less than the circuit output end of pressure-stabilizing.
4. the fault detector suitable for low temperature environment according to claim 3, it is characterised in that the battery is using electricity
Cell voltage is the battery of 3.6V；It is the circuit of 5V that the mu balanced circuit uses output end voltage value.
5. the fault detector suitable for low temperature environment according to claim 1, it is characterised in that the 1st diode
Forward voltage drop identical diode is used with the 2nd diode, its forward voltage drop is 0.2V.
6. the fault detector suitable for low temperature environment according to claim 1, it is characterised in that the super capacitor is adopted
With the super electric capacity that magnitude of voltage when completely filling is U1；It is the voltage stabilizing chip of U2 that the voltage stabilizing chip uses output end voltage value, also,
U1 is more than U2.
7. the fault detector suitable for low temperature environment according to claim 6, it is characterised in that U1 is 3.6V；U2 is
3.1V。
8. the fault detector suitable for low temperature environment according to claim 1, it is characterised in that the mu balanced circuit is adopted
Use mu balanced circuit overvoltage crowbar.
9. a kind of distribution line failure of the fault detector described in application claim any one of 1-8 suitable for low temperature environment is determined
Position system, it is characterised in that including fault detector, communicating terminal and main station system；The fault detector is by described logical
News terminal is communicated to connect with the main station system.
10. fault location system for distribution lines according to claim 9, it is characterised in that the communicating terminal is configured with
Back-up source and main power source；The back-up source is low form lead-acid accumulator；The main power source is solar cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621279565.9U CN206193157U (en) | 2016-11-25 | 2016-11-25 | Fault indicator and distribution lines fault location system suitable for low temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621279565.9U CN206193157U (en) | 2016-11-25 | 2016-11-25 | Fault indicator and distribution lines fault location system suitable for low temperature environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206193157U true CN206193157U (en) | 2017-05-24 |
Family
ID=58725184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621279565.9U Active CN206193157U (en) | 2016-11-25 | 2016-11-25 | Fault indicator and distribution lines fault location system suitable for low temperature environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206193157U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340457A (en) * | 2017-06-05 | 2017-11-10 | 三峡大学 | A kind of novel power distribution network fault positioner |
| CN111864888A (en) * | 2020-07-22 | 2020-10-30 | 石家庄科林电气股份有限公司 | Method for automatically adjusting operation mode |
| CN114280417A (en) * | 2021-12-20 | 2022-04-05 | 新疆交投科技有限责任公司 | Power failure and data transmission processing method for energy efficiency and environment monitoring system |
| CN116317058A (en) * | 2023-05-15 | 2023-06-23 | 北京国电通网络技术有限公司 | Intelligent monitoring device and intelligent power supply control method |
-
2016
- 2016-11-25 CN CN201621279565.9U patent/CN206193157U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340457A (en) * | 2017-06-05 | 2017-11-10 | 三峡大学 | A kind of novel power distribution network fault positioner |
| CN107340457B (en) * | 2017-06-05 | 2023-11-03 | 三峡大学 | Fault positioning device for power distribution network |
| CN111864888A (en) * | 2020-07-22 | 2020-10-30 | 石家庄科林电气股份有限公司 | Method for automatically adjusting operation mode |
| CN114280417A (en) * | 2021-12-20 | 2022-04-05 | 新疆交投科技有限责任公司 | Power failure and data transmission processing method for energy efficiency and environment monitoring system |
| CN114280417B (en) * | 2021-12-20 | 2023-08-08 | 新疆交投科技有限责任公司 | Power failure and data transmission processing method for energy efficiency and environment monitoring system |
| CN116317058A (en) * | 2023-05-15 | 2023-06-23 | 北京国电通网络技术有限公司 | Intelligent monitoring device and intelligent power supply control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204068347U (en) | A kind of solar control circuit | |
| CN206193157U (en) | Fault indicator and distribution lines fault location system suitable for low temperature environment | |
| CN103427430B (en) | A kind of energy management method of mixed energy storage system in microgrid | |
| CN105914868A (en) | Supercapacitor energy storage uninterruptible power supply based on current transformer, and power supply method thereof | |
| CN102280924B (en) | Uninterrupted power supply system for relay protection device | |
| CN102097948B (en) | High potential direct current (DC) voltage energy-taking power supply | |
| CN109950969B (en) | Transformer substation direct current system emergency power supply based on photovoltaic standby | |
| CN202512170U (en) | Intelligent ammeter communication module circuit structure having power-off protection function | |
| CN109687571A (en) | Electric power 48V direct current supply control system | |
| CN209982165U (en) | Unsmooth constant voltage power supply circuit that group battery is changeable | |
| CN204179731U (en) | Support the distribution line on-line monitoring acquisition terminal of circuit automatic electricity getting | |
| CN110829578A (en) | Remote terminal unit with power-down protection and alarm functions and using method thereof | |
| CN103746444B (en) | Dual power supply bus cold standby construction for electricity | |
| CN202872443U (en) | Fuel-cell-based communication power supply | |
| CN203278384U (en) | Power supply system of vehicle-mounted video terminal | |
| CN102074966B (en) | System and method for combining distributed generation and distribution network in distribution network terminal | |
| CN204481544U (en) | A kind of wireless charging device for transmission line on-line monitoring equipment | |
| CN201985761U (en) | HPOT DC voltage draw-out power supply | |
| CN105337402A (en) | DC5V dual-power-source switching device based on super-capacitor backup source | |
| CN204190499U (en) | Support the distribution line on-line monitoring acquisition terminal of solar energy power taking | |
| CN112436586A (en) | Power supply system based on double super capacitor sets | |
| CN208156055U (en) | A kind of anti-breaking power metering tank | |
| CN107968404B (en) | Power management system and method for overhead line data acquisition terminal | |
| CN205920186U (en) | Line fault collector | |
| CN205039577U (en) | Join in marriage built on stilts two distant communication terminal on type in net twine way |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |