CN112952774A - Instantaneous voltage reverse locking module based on power distribution terminal - Google Patents
Instantaneous voltage reverse locking module based on power distribution terminal Download PDFInfo
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- CN112952774A CN112952774A CN202110201157.0A CN202110201157A CN112952774A CN 112952774 A CN112952774 A CN 112952774A CN 202110201157 A CN202110201157 A CN 202110201157A CN 112952774 A CN112952774 A CN 112952774A
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- module
- voltage
- direct current
- power
- current voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
Abstract
The invention relates to the field of power distribution and utilization, and discloses an instantaneous voltage reverse locking module based on a power distribution terminal, which comprises a linear transformer, a rectifier bridge, a filter capacitor, an MCU module and a minimum system thereof, an LDO module, a power management module and a UART communication module, wherein the linear transformer is used as input, the instantaneous voltage is collected and converted into direct current time voltage, the direct current time voltage is rectified and filtered through the rectifier bridge and the filter capacitor, the LDO module receives the processed direct current voltage and supplies power to each module, the MCU module identifies and stores the rectified direct current voltage, the UART communication module communicates with the outside, and simultaneously transmits a direct current voltage signal to the power distribution terminal and receives a return signal, so that the instantaneous voltage reverse locking function is realized. The module of the invention has small volume and low cost, can adapt to various specifications through software configuration, quickly identify and memorize faults, is beneficial to the analysis of field faults and greatly improves the reliability of the instantaneous voltage reverse locking module.
Description
Technical Field
The invention relates to the field of medium-voltage power distribution, in particular to an instantaneous voltage reverse locking module based on a power distribution terminal.
Background
The distribution terminal is installed on a column of a distribution network feeder line loop, a switch cabinet and the like and has remote signaling, remote measuring, remote controlling and feeder line automation functions, can monitor information such as voltage and current of a primary line and has a function of controlling primary switching. Through the cooperation of the power distribution terminal and the primary equipment, the fault of the power distribution line can be quickly diagnosed and automatically isolated after the fault occurs on the power distribution line, so that the fault power failure range is reduced, and the power supply reliability is improved for the recoverable power supply of the non-fault section of the line.
The most mature and logically simple and reliable, commonly accepted, and commonly accepted, voltage-time feeder automation logic among the many ways of feeder automation for line fault isolation, non-faulted segment restoration power. The key point of improving the power supply reliability is to perform power restoration on a non-fault section in a power distribution network line. Voltage time type feeder automation logic wants to realize the recovery power supply of non-trouble section fast effectual, reduces the power failure number and needs the distribution terminal at line fault point rear end can have the measure to realize reverse shutting combined floodgate function: if the power is off or instantaneous residual voltage occurs in the set time before the switch is switched on, the switch is switched on by reverse locking, and the reverse power transmission switch is not switched on.
Two types of transient reverse locking modules are mainly used at present: firstly, the transient voltage acquisition and memory device is built by pure hardware, and is matched with a self-holding relay through devices such as a linear transformer, a rectifier bridge and a filter capacitor to acquire and memorize a transient voltage signal; secondly, instantaneous voltage acquisition and memory are realized through software, and an auxiliary power supply is required to be configured in the design, so that the whole module can be operated all the time in the life cycle. Both of these problems have certain drawbacks: the first design can not flexibly configure each parameter, only can select by adjusting hardware devices, and simultaneously increases the volume and the cost of two paths of self-holding relays; the second type of design has high requirements on the auxiliary power supply, and the reliability is reduced because the auxiliary power supply may fail due to the severe field environment.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an instantaneous voltage reverse locking module based on a power distribution terminal, which can be suitable for various specifications through parameter configuration, has no requirement on a standby power supply of the power distribution terminal, can independently realize identification of an instantaneous voltage signal, and transmits a locking signal to a feeder terminal.
In order to achieve the above object, the present invention provides an instantaneous voltage reverse blocking module based on a power distribution terminal, which comprises a linear transformer, a rectifier bridge, a filter capacitor, a low-power consumption MCU module capable of being started quickly, a minimum system thereof, a low-power consumption LDO module capable of being responded quickly, a power management module, and a UART communication module, wherein:
the linear transformer receives the instantaneous voltage of which the instantaneous voltage amplitude is more than or equal to 50 percent Un generated by the fault line, converts the instantaneous voltage into a proper voltage grade, and simultaneously sends the voltage grade to the LDO power supply module to provide power supply input;
the rectifier bridge is used for rectifying the instantaneous alternating current input voltage provided by the linear transformer to obtain direct current voltage, and the direct current voltage is provided for the MCU module for collection;
the filter capacitor is used for stabilizing the direct-current voltage output by the rectifier bridge and filtering the direct-current voltage;
the LDO module receives the filtered direct-current voltage and provides power input for the module, and the back end of the LDO module converts the voltage to maintain the operation of each module;
the MCU module is used for controlling the switch of the power switch module, simultaneously collecting and identifying the direct current voltage sent by the rectifier bridge, judging whether the direct current voltage needs to be memorized according to a reasonable threshold value, if the direct current voltage needs to be memorized, storing a direct current power supply signal, feeding back the stored direct current voltage signal to the power distribution terminal after the circuit recovers normal power supply, receiving a reset signal sent by the power distribution terminal, and clearing the stored information;
the minimum system ensures the normal operation of the MCU module;
the power switch module is used for disconnecting the switch under the condition that the circuit is not electrified, not supplying power to the UART communication module any more, reducing power consumption, and closing the switch under the condition that the circuit is electrified to continuously supply power to the UART communication module;
and the UART communication module performs 232-TTL level conversion and supports the MCU module to complete software upgrading and parameter configuration.
The invention has the beneficial effects that: the design of an auxiliary power supply can be abandoned by using a linear transformer to carry out transient voltage signal input and system power supply input, and the reliability of the module is improved. By using software to write in module parameters and acquire information, the method can flexibly adapt to regulations of different specifications and meet requirements under different scenes.
Drawings
FIG. 1 is a block diagram of an instantaneous reverse blocking module based on a power distribution terminal according to the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1, an instantaneous reverse blocking module based on a power distribution terminal includes a linear transformer, a rectifier bridge, a filter capacitor, a low-power consumption MCU module capable of being started quickly, a minimum system thereof, a low-power consumption LDO module capable of being responded quickly, a power management module, and a UART communication module, wherein:
the linear transformer receives the instantaneous voltage of which the instantaneous voltage amplitude is more than or equal to 50 percent Un generated by the fault line, converts the instantaneous voltage into a proper voltage grade, and simultaneously sends the voltage grade to the LDO power supply module to provide power supply input;
the rectifier bridge is used for rectifying the instantaneous alternating current input voltage provided by the linear transformer to obtain direct current voltage, and the direct current voltage is provided for the MCU module for collection;
the filter capacitor is used for stabilizing the direct-current voltage output by the rectifier bridge and filtering the direct-current voltage;
the LDO module receives the filtered direct-current voltage and provides power input for the module, and the back end of the LDO module converts the voltage to maintain the operation of each module;
the MCU module is used for controlling the switch of the power switch module, simultaneously collecting and identifying the direct current voltage sent by the rectifier bridge, judging whether the direct current voltage needs to be memorized according to a reasonable threshold value, if the direct current voltage needs to be memorized, storing a direct current power supply signal, feeding back the stored direct current voltage signal to the power distribution terminal after the circuit recovers normal power supply, receiving a reset signal sent by the power distribution terminal, and clearing the stored information;
the minimum system ensures the normal operation of the MCU module;
the power switch module is used for disconnecting the switch under the condition that the circuit is not electrified, not supplying power to the UART communication module any more, reducing power consumption, and closing the switch under the condition that the circuit is electrified to continuously supply power to the UART communication module;
and the UART communication module performs 232-TTL level conversion and supports the MCU module to complete software upgrading and parameter configuration.
The above-mentioned embodiments are illustrative of the specific embodiments of the present invention, and are not restrictive, and those skilled in the relevant art can make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention, so that all equivalent technical solutions should be included in the scope of the present invention.
Claims (1)
1. The utility model provides a reverse shutting module of transient voltage based on distribution terminal, contains linear transformer, rectifier bridge, filter capacitor, but the MCU module of low-power consumption quick start and minimum system, but LDO module, power management module and the UART communication module of low-power consumption quick response, its characterized in that:
the linear transformer receives the instantaneous voltage of which the instantaneous voltage amplitude is more than or equal to 50 percent Un generated by the fault line, converts the instantaneous voltage into a proper voltage grade, and simultaneously sends the voltage grade to the LDO power supply module to provide power supply input;
the rectifier bridge is used for rectifying the instantaneous alternating current input voltage provided by the linear transformer to obtain direct current voltage, and the direct current voltage is provided for the MCU module for collection;
the filter capacitor is used for stabilizing the direct-current voltage output by the rectifier bridge and filtering the direct-current voltage;
the LDO module receives the filtered direct-current voltage and provides power input for the module, and the back end of the LDO module converts the voltage to maintain the operation of each module;
the MCU module is used for controlling the switch of the power switch module, simultaneously collecting and identifying the direct current voltage sent by the rectifier bridge, judging whether the direct current voltage needs to be memorized according to a reasonable threshold value, if the direct current voltage needs to be memorized, storing a direct current power supply signal, feeding back the stored direct current voltage signal to the power distribution terminal after the circuit recovers normal power supply, receiving a reset signal sent by the power distribution terminal, and clearing the stored information;
the minimum system ensures the normal operation of the MCU module;
the power switch module is used for disconnecting the switch under the condition that the circuit is not electrified, not supplying power to the UART communication module any more, reducing power consumption, and closing the switch under the condition that the circuit is electrified to continuously supply power to the UART communication module;
and the UART communication module performs 232-TTL level conversion and supports the MCU module to complete software upgrading and parameter configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110201157.0A CN112952774A (en) | 2021-02-23 | 2021-02-23 | Instantaneous voltage reverse locking module based on power distribution terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110201157.0A CN112952774A (en) | 2021-02-23 | 2021-02-23 | Instantaneous voltage reverse locking module based on power distribution terminal |
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| Publication Number | Publication Date |
|---|---|
| CN112952774A true CN112952774A (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110201157.0A Withdrawn CN112952774A (en) | 2021-02-23 | 2021-02-23 | Instantaneous voltage reverse locking module based on power distribution terminal |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160041216A1 (en) * | 2013-03-29 | 2016-02-11 | Beijing Inhand Networks Technology Co., Ltd. | Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network |
| CN208060618U (en) * | 2018-03-09 | 2018-11-06 | 南京南瑞继保电气有限公司 | A kind of transient fault voltage detecting writing circuit |
| CN111983297A (en) * | 2020-08-21 | 2020-11-24 | 重庆新世杰电气股份有限公司 | Instantaneous residual voltage detection method, device and equipment and residual voltage recording assembly |
-
2021
- 2021-02-23 CN CN202110201157.0A patent/CN112952774A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160041216A1 (en) * | 2013-03-29 | 2016-02-11 | Beijing Inhand Networks Technology Co., Ltd. | Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network |
| CN208060618U (en) * | 2018-03-09 | 2018-11-06 | 南京南瑞继保电气有限公司 | A kind of transient fault voltage detecting writing circuit |
| CN111983297A (en) * | 2020-08-21 | 2020-11-24 | 重庆新世杰电气股份有限公司 | Instantaneous residual voltage detection method, device and equipment and residual voltage recording assembly |
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Application publication date: 20210611 |
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