CN213957533U - Fault indicator - Google Patents
Fault indicator Download PDFInfo
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- CN213957533U CN213957533U CN202023224422.7U CN202023224422U CN213957533U CN 213957533 U CN213957533 U CN 213957533U CN 202023224422 U CN202023224422 U CN 202023224422U CN 213957533 U CN213957533 U CN 213957533U
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Abstract
The utility model relates to a fault indicator belongs to power system equipment state detection technical field. The fault indicator comprises a plurality of acquisition units and a collection unit, wherein the acquisition units comprise: the induction coil is wound on the bus and used for getting electricity from the bus; the input end of the rectifying circuit is connected with the induction coil and is used for rectifying the output current; the input end of the DC/DC module is connected with the output end of the rectifying circuit and is used for outputting stable direct-current voltage; the super capacitor is connected with the output end of the DC/DC module and charges the super capacitor through the DC/DC module, and the super capacitor is connected with the main control module and used for supplying power to the main control module; and the storage battery is connected with the super capacitor in parallel, is connected with the output end of the DC/DC module and is used for charging the super capacitor. The utility model discloses a power supply mode of induction coil, super capacitor and battery has improved the reliability of acquisition unit power supply.
Description
Technical Field
The utility model relates to a fault indicator belongs to power system equipment state detection technical field.
Background
Distribution lines point is many-sided wide, and the environment is complicated, and faults such as single-phase ground connection take place easily, and fault indicator distributes and installs on distribution lines, as distribution lines's perception unit, real-time supervision, perception distribution lines's operational aspect.
The fault indicator is installed on the overhead line, and one set of fault indicator consists of 3 acquisition units and 1 collection unit. The collecting unit is installed on the overhead line through current transformer buckle formula suspension, and 3 collecting unit install respectively in circuit A looks, B looks, C looks, converge the unit and install on the nearest wire pole, and collecting unit and gathering the unit and carry out two-way communication through Zigbee wireless communication.
In the fault indicator, the power supply mode of the acquisition unit is usually that an overload current acquisition coil automatically gets power, and under the condition that the circuit is out of power, the fault indicator cannot supply power, so that the fault indicator cannot normally operate and is poor in reliability.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a fault indicator for solve the problem that current fault indicator power supply reliability is poor.
In order to achieve the above object, the present application provides a technical solution of a fault indicator, which includes a plurality of collecting units and a collecting unit, wherein the collecting unit includes a current collecting module for collecting bus current, and the collecting unit further includes:
the induction coil is wound on the bus and used for getting electricity from the bus;
the input end of the rectifying circuit is connected with the induction coil and is used for rectifying the output current;
the input end of the DC/DC module is connected with the output end of the rectifying circuit and is used for outputting stable direct-current voltage;
the super capacitor is connected with the output end of the DC/DC module and charges the super capacitor through the DC/DC module, and the super capacitor is connected with the main control module and used for supplying power to the main control module;
and the storage battery is connected with the super capacitor in parallel, is connected with the output end of the DC/DC module and is used for charging the super capacitor.
The utility model discloses a fault indicator's technical scheme's beneficial effect is: the utility model discloses a fault indicator's collection unit, set up super capacitor and battery to super capacitor passes through rectifier circuit and DC/DC module connection induction coil, and then induction coil charges for super capacitor; the storage battery is connected with the output end of the DC/DC module and is connected with the super capacitor in parallel, the induction coil can charge the storage battery after getting electricity, and meanwhile, the storage battery can charge the super capacitor. When the bus current is large, the storage battery can be charged, and the super capacitor can be charged, so that the power supply of the main control module is completed; when the bus current is small and cannot provide enough voltage, the super capacitor supplies power to the main control module; after the super capacitor supplies power, the voltage is gradually reduced, and when the voltage is reduced to the condition that the power cannot be supplied, the storage battery charges for the super capacitor, so that the power supply of the main control module is ensured. The utility model discloses a power supply mode of induction coil, super capacitor and battery has improved the reliability of acquisition unit power supply, guarantees acquisition unit's normal operating.
Furthermore, a relay is arranged on a connecting line between the storage battery and the output end of the DC/DC module, the main control module controls and is connected with the relay, and the main control module is connected with the storage battery in a sampling mode.
Furthermore, the acquisition unit further comprises a smoothing reactor connected between the induction coil and the rectification circuit and used for limiting the output current of the induction coil.
Furthermore, the input end of the rectifying circuit is connected in parallel with a discharge circuit for discharging the redundant electric quantity.
Furthermore, the acquisition unit further comprises a wireless communication module, and the wireless communication module is connected with the main control module and is used for performing wireless communication with the collection unit.
Further, in order to reduce power consumption and increase the distance of wireless communication, the wireless communication module is an LoRa module.
Further, in order to reduce power consumption, the model of the master control module is STM32L021D 4.
Furthermore, the model of the super capacitor is 5V/10F, and the working voltage is 3.3V-5V.
Drawings
Fig. 1 is a schematic block diagram of the fault indicator of the present invention.
Detailed Description
Fault indicator embodiment:
the set of fault indicator comprises three acquisition units arranged on an overhead line (namely a bus) and a collection unit arranged on a telegraph pole, wherein the acquisition units and the collection unit are in wireless communication, and information acquired by the acquisition units is sent to the collection unit.
The acquisition unit is shown in fig. 1 and comprises: the device comprises an induction coil, a smoothing reactor, a bleeder circuit, a rectifying circuit, a DC/DC module, a super capacitor, a storage battery, a current acquisition module, a LoRa module and a main control module.
The induction coil is wound on the bus and used for getting electricity from the bus;
the smoothing reactor is connected with the induction coil and is used for limiting the output current of the induction coil;
the bleeder circuit is connected in parallel with two ends of the induction coil and the plane wave reactor and is used for discharging redundant electric quantity;
the input end of the rectifying circuit is connected with the bleeder circuit in parallel and is used for rectifying and filtering the output current;
the DC/DC module is a wide-voltage DC/DC module, and the input end of the wide-voltage DC/DC module is connected with the output end of the rectifying circuit and is used for outputting stable direct-current voltage;
the super capacitor is 5V/10F in model and 3.3-5V in working voltage, and is connected with the output end of the DC/DC module and is charged through the DC/DC module;
the storage battery is connected with the output end of the DC/DC module, is connected with the super capacitor in parallel, is provided with a relay S1 on a connecting line with the output end of the DC/DC module, realizes the charge and discharge of the storage battery through the closing of the relay S1, and finishes the charge after the storage battery is fully charged through the disconnection of the relay S1;
the current acquisition module is used for acquiring bus current;
the system comprises an LoRa module, wherein the LoRa module adopts an LoRa communication module based on an SX1262 radio frequency chip, the working current is 15uA during wireless awakening, the deep dormancy current is 2uA, and the LoRa module is used for carrying out wireless communication with the LoRa module in a collecting unit;
the main control module adopts the model STM32L021D4, the power consumption of the main control module is 2.432mA under the working condition of 32MHz main frequency, the power consumption of the ADC is 0.041mA, and the power supply end of the main control module is connected with the super capacitor and used for supplying power to the main control module through the super capacitor; the main control module is connected with the current acquisition module and is used for acquiring current data acquired by the current acquisition module; an AD interface of the master control module samples a charging and discharging circuit of the storage battery and is used for acquiring the voltage of the storage battery; the main control module is connected with the relay in a control mode and used for controlling the opening/closing of the relay; the serial port of the main control module is connected with the LoRa module and used for sending the data of the main control module to the LoRa module, the main control module sets the spreading factor SSF of the LoRa module to be larger than 9, and the control transmission rate is guaranteed to be not smaller than 3kbit/s under the condition of lowest power consumption.
The power supply process of the acquisition unit comprises the following steps: the induction coil is used for obtaining electricity from the bus in an induction mode, the electricity is transmitted to the bleeder circuit through the smoothing reactor, the smoothing reactor limits the current and the voltage output by the induction coil under the condition of large current of the bus, and meanwhile the bleeder circuit protects a post-stage circuit and discharges redundant electric quantity; the rectifying circuit rectifies and filters the current meeting the requirement and then outputs the voltage meeting the wide-voltage DC/DC module, and then the wide-voltage DC/DC module outputs stable 5V voltage to supply power for the super capacitor, the load (a main control module) and the storage battery. When the line load (namely bus current) is more than 5A, the super capacitor is charged by adopting an induction coil direct power taking mode, and then the power is supplied to the main control module through the super capacitor; when the line load is more than 25A, the induction coil takes electricity to charge the super capacitor and also charge the storage battery; when the line load is less than 5A, the super capacitor is adopted to supply power to the main control module, so that the normal work of the acquisition unit is ensured; after the super capacitor supplies power, the voltage is gradually reduced, and when the voltage of the super capacitor is close to 3.3V, the storage battery is used for charging the super capacitor, so that the normal work of the acquisition unit is ensured.
When the super capacitor is adopted for power supply, the maximum working current of the main control module is taken as 2.5mA, and then under an ideal state, the calculation formula of the working time of the super capacitor is as follows:
wherein t is the working time of the super capacitor, and C is the capacitance value of the super capacitor; u shapemaxThe maximum voltage for the super capacitor to work; u shapeminA minimum voltage for the supercapacitor to operate at; and I is the maximum working current of the main control module.
After calculation, the working time t of the super capacitor is 4000 s.
The working process of the acquisition unit is as follows: the bus current is collected by the current collection module, secondary collection is carried out by the main control module, and collected data are sent to the collection unit through the LoRa module; meanwhile, the main control module controls whether the storage battery is connected with the output end of the DC/DC module and the super capacitor through the control relay S1, the main control module judges whether the storage battery is fully charged through the voltage of the storage battery, the control relay S1 is disconnected after the storage battery is fully charged, and when the storage battery is required to charge the super capacitor or the storage battery is required to charge, the control relay S1 is closed.
In the above embodiment, the control relay S1 is turned off to control the battery to end charging after the battery is fully charged in order to protect the battery, and as another embodiment, the relay S1 may not be provided when the safety of the battery is ensured.
In the above embodiment, the smoothing reactor and the bleeder circuit are provided between the induction coil and the rectifier circuit in order to improve the safety of power supply, and as another embodiment, the smoothing reactor and the bleeder circuit may not be provided in a case where the safety of power supply is ensured.
In the above embodiment, whether the storage battery is fully charged is determined by collecting the voltage, and as another embodiment, whether the storage battery is fully charged may be determined by collecting the current.
In the above-mentioned embodiment, in order to reduce the pencil, the collection unit with collect and adopt wireless communication module to communicate between the unit to in order to increase wireless transmission's distance, wireless communication module adopts the LoRa module, as other implementation modes, also can adopt other wireless communication modules such as Zigbee wireless communication module, perhaps adopt wired communication's mode to communicate, the utility model discloses do not limit to this.
Specific model about super capacitor, host system the utility model discloses do not do the restriction, can realize corresponding function can.
The utility model discloses an induction coil or battery charge for super capacitor, use super capacitor to carry out the normal work of collection unit for the power supply mode that main control module supplied power, main control module and wireless communication module all adopt the device of low-power consumption, have reduced the holistic consumption of collection unit to the loRa module can also greatly increased collection unit and collect the communication distance between the unit.
Claims (8)
1. The utility model provides a fault indicator, includes a plurality of acquisition unit and one collects the unit, and acquisition unit includes the current acquisition module that is used for gathering the generating line electric current, its characterized in that, acquisition unit still includes:
the induction coil is wound on the bus and used for getting electricity from the bus;
the input end of the rectifying circuit is connected with the induction coil and is used for rectifying the output current;
the input end of the DC/DC module is connected with the output end of the rectifying circuit and is used for outputting stable direct-current voltage;
the super capacitor is connected with the output end of the DC/DC module and charges the super capacitor through the DC/DC module, and the super capacitor is connected with the main control module and used for supplying power to the main control module;
and the storage battery is connected with the super capacitor in parallel, is connected with the output end of the DC/DC module and is used for charging the super capacitor.
2. The fault indicator of claim 1, wherein a relay is arranged on a connection line between the storage battery and the output end of the DC/DC module, the main control module is connected with the relay in a control mode, and the main control module is connected with the storage battery in a sampling mode.
3. The fault indicator of claim 1 or 2, wherein the pick-up unit further comprises a smoothing reactor connected between the induction coil and the rectifying circuit for limiting the output current of the induction coil.
4. The fault indicator of claim 1 or 2, wherein the input of the rectifying circuit is connected in parallel with a bleeding circuit for bleeding off excess power.
5. The fault indicator according to claim 1 or 2, wherein the collecting unit further comprises a wireless communication module, and the wireless communication module is connected with the main control module and is used for wirelessly communicating with the collecting unit.
6. The fault indicator of claim 5, wherein the wireless communication module is a LoRa module.
7. The fault indicator according to claim 1 or 2, characterized in that the master module is of model number STM32L021D 4.
8. The fault indicator of claim 1 or 2, wherein the super capacitor is 5V/10F in size and has an operating voltage of 3.3V to 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023224422.7U CN213957533U (en) | 2020-12-24 | 2020-12-24 | Fault indicator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023224422.7U CN213957533U (en) | 2020-12-24 | 2020-12-24 | Fault indicator |
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| CN213957533U true CN213957533U (en) | 2021-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114944631A (en) * | 2022-05-05 | 2022-08-26 | 国网山东省电力公司泰安供电公司 | Overhead line is with high altitude warning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114944631A (en) * | 2022-05-05 | 2022-08-26 | 国网山东省电力公司泰安供电公司 | Overhead line is with high altitude warning system |
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