CN112630523A - Deep fusion type digital sensor equipment for digital reconstruction - Google Patents
Deep fusion type digital sensor equipment for digital reconstruction Download PDFInfo
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- CN112630523A CN112630523A CN202110121616.4A CN202110121616A CN112630523A CN 112630523 A CN112630523 A CN 112630523A CN 202110121616 A CN202110121616 A CN 202110121616A CN 112630523 A CN112630523 A CN 112630523A
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- 238000005516 engineering process Methods 0.000 claims description 7
- 238000012986 modification Methods 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005477 standard model Effects 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 238000009420 retrofitting Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 206010063385 Intellectualisation Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J11/00—Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The invention relates to a depth fusion type digital sensor device for digital reconstruction, which consists of a voltage sensor, a current sensor, a self-powered unit, a detachable control unit and a backup power supply. The voltage sensor and the current sensor collect three-phase voltage, three-phase current, zero sequence voltage and zero sequence current and transmit the three-phase voltage, the three-phase current, the zero sequence voltage and the zero sequence current to the control unit through the connecting terminals, the on-column switch is connected with the control unit through the aviation plug-in unit to transmit state quantity and control quantity, and the control unit is communicated with the main station to realize three-remote signal processing and transmission and realize digitization of the on-column switch. The automatic power taking unit takes power from the high-voltage side of the switch, provides a working power supply for equipment, performs charge and discharge management on a backup power supply, and provides a power supply for the backup power supply when the switch is powered off and acts. The equipment carries out deep fusion on primary high-precision sensor equipment, self-powered equipment, a secondary control unit and a novel backup power supply. The device is used for but not limited to digital transformation of a 10kV switch, and is plug and play.
Description
Technical Field
The invention belongs to the technical field of medium and low voltage power distribution, and relates to deep fusion type digital sensor equipment for digital transformation.
Background
Digital development includes three aspects: informatization, networking and intellectualization. The digitization transformation is a process of transforming from informatization to networking and intellectualization, and finally intellectualization is realized.
For digital transformation of a distribution network, state network companies propose the standard and integration level for improving primary and secondary distribution equipment, the operation level, the operation and maintenance quality and the efficiency of the distribution equipment are improved, the technical requirements of line loss management are met, and a power distribution network construction and transformation action plan is served. Therefore, the primary and secondary fusion technology is pushed to the deep fusion, and a primary device, a high-precision sensor and a secondary terminal device are fused by combining the standardized design of the primary device, so that the aims of reliability, miniaturization, platform, universality and economy are fulfilled. The distribution network in China is wide and complicated, and if the stock switch is replaced by the existing one-time and two-time complete switch, the cost is higher. Therefore, a national network company selects a digital transformation scheme with higher cost performance, puts forward the strategic requirements of distribution network operation service management, improves the equipment model selection standard, and comprehensively promotes the automatic upgrading and transformation of the 10kV column switch according to the principles of safety, reliability, firmness, durability, unified standard and universal interchange.
Disclosure of Invention
The invention provides a depth fusion type digital sensor device for digital transformation. The device meets the technical requirements of primary and secondary fusion, and provides reliable, universal, convenient and economic digital transformation equipment for upgrading and transforming a 10kV pole-mounted switch.
The above-mentioned equipment is characterized by that: the device consists of a voltage sensor, a current sensor, a self-powered unit, a detachable control unit and a backup power supply. (1) The voltage sensor and the current sensor collect three-phase voltage, three-phase current, zero sequence voltage and zero sequence current and transmit the three-phase voltage, the three-phase current, the zero sequence voltage and the zero sequence current to the control unit through the connecting terminals, the on-column switch is connected with the control unit through the aviation plug-in unit to transmit state quantity and control quantity, and the control unit is communicated with the main station to realize three-remote signal processing and transmission and realize digitization of the on-column switch. (2) The automatic power taking unit takes power from the high-voltage side of the switch, provides a working power supply for equipment, and performs charging and discharging management for a backup power supply. (3) And the standby power supply provides power when the switch is powered off and the switch is operated. (4) The equipment is small and light, and the whole quantity is controlled within 10 Kg.
The electronic voltage sensor is connected with a high-voltage capacitor at the switch inlet wire side to obtain voltage, then is connected with a low-voltage capacitor in series and grounded, and an output line is connected with the low-voltage capacitor in parallel to output a voltage signal divided by the low-voltage capacitor. And the telemetering signals of three-phase voltage and zero-sequence voltage are acquired by three groups of electronic voltage sensors and one group of zero-sequence voltage sensors.
The electronic current sensor is connected with an electromagnetic current transformer CT of the LPCT at the inlet wire side of the switch, primary bus current is converted into secondary small current through the CT, a sampling resistor is connected in series at the secondary side, and the secondary current is converted into a small voltage signal which is in direct proportion to the primary current and is output. And the telemetering signals of the three-phase current and the zero-sequence current are acquired by three groups of electronic current sensors and one group of zero-sequence current sensor.
The self-powered unit adopts a high-voltage-dividing capacitor C1 and a low-voltage-dividing capacitor C2 to divide voltage and then outputs a voltage value through transformer transformation. The single-phase power taking power is 3-5W, and the single-phase power taking power supply provides a working power supply for intelligent equipment such as a control unit and a sensing unit and simultaneously performs charge and discharge management on a backup power supply.
The depth fusion type digital sensor device is characterized in that an electronic voltage sensor, an electronic current sensor and a self-power-taking unit are integrally poured and fixedly sealed in a pole according to the phase as a group unit. The voltage and current sensors are all voltage small-signal output, potential safety hazards caused by short circuit of the voltage transformer and open circuit of the current transformer can be thoroughly avoided, and the accuracy of measured values is high.
The control unit has the following functions: voltage signals of the voltage and current sensors are received, voltage small signals are processed in a digital mode, long-distance cable connection is not needed, and the electromagnetic influence precision and performance of signal transmission of the electronic sensor are reduced. And the column switch is connected with an aviation plug-in unit and used for transmitting state quantity and control signals and controlling the column switch. The control unit meets the functional requirements of a primary and secondary fusion technology on the feeder automation terminal, and the plug-and-play technology based on the IEC 61850/CIM standard model is applied to realize the plug-and-play of the equipment and the digitization of the pole-mounted switch.
The novel backup power supply is a small and light novel battery, and the selection type of the novel backup power supply comprises a lithium titanate battery, a lithium capacitor and an oxidized alloy battery. And the power supply management unit is used for carrying out charge and discharge management on the backup power supply and providing power supply for the switching action.
The invention relates to a depth fusion type digital sensor device, which carries out depth fusion on primary high-precision electronic voltage and current sensors, self-powered equipment, a secondary control unit and a novel backup power supply. The electronic voltage and current sensor, the power-taking unit and the control unit have the advantages of light weight and small structure, so the depth fusion type digital sensor device of the invention is controlled to be 10Kg as a whole, and still has the advantages of light weight and small size.
The depth fusion type digital sensor equipment structure is composed of three groups of solid-sealed polar columns and a cuboid base. And each group of poles is embedded with a sensor element of a current, zero-sequence current, voltage, zero-sequence voltage and power taking unit. The cuboid base is used for embedding a backup power supply and a control unit. The installation position of the control unit is convenient for installing and disassembling the control unit under the condition that primary equipment is not powered off.
The depth fusion type digital sensor device is integrally controlled to be 10Kg, and the incoming line terminal of the on-column switch meets the requirement of the device on stress, so that the device is installed at the incoming line terminal of the on-column switch and fixed by a fixing screw, and the device has the advantage of convenience in installation.
The deep fusion type digital sensor equipment is used for but not limited to the digital transformation of a 10kV switch.
The depth fusion type digital sensor equipment has the following advantages when used for digital transformation:
the integrated high-precision sensor, terminal function, back-up power supply and self-power-taking unit meet the requirement of national network on digital transformation of 10kV column switches. The equipment is small, light and convenient to install. The self-power-taking unit solves the problem of power taking under the condition of column opening without PT power taking, and accords with the universality of transformation. The equipment is plug and play, and the labor cost of on-site operation and maintenance is reduced. The device may also be used for a quadratic depth fusion switch.
Drawings
FIG. 1 is a block diagram of a depth fusion digital sensor apparatus of the present invention;
FIG. 2 is a schematic view of a deep fusion type digital sensor device pole sealing method of the present invention;
FIG. 3 is a schematic view of the installation of the depth fusion digital sensor apparatus of the present invention;
fig. 4 is a schematic diagram of the real depth fusion digital sensor device of the present invention.
In the figure: 1. a current sensor; 2. a zero sequence current sensor; 3. a voltage sensor; 4, a zero sequence voltage sensor; 5. a power taking unit; 6. a control unit; 7. a backup power supply; 8. Empty sealing for standby; 9. a fixed structure; 10. an on-pole switch incoming terminal; 11. a power manager; 12. aviation plug-in components.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
Detailed description of the preferred embodiment
The invention relates to an old breaker of a 10kV pole-mounted switch reconstruction field, an old controller without a controller, a PT (potential Transformer) or protection function, a reconstruction field with a PT and the like
If the old-fashioned circuit breaker has an electric switching-on and switching-off function, the depth fusion type digital sensor device is installed, and a control unit of the device is connected with the pole-mounted switch through an aviation plug-in, so that the functions of remote measurement, remote signaling and remote control are realized, and the three-remote transformation is completed.
If the old circuit breaker has no electric switching-on and switching-off function, the depth fusion type digital sensor equipment is installed, and a control unit of the equipment is connected with the pole-mounted switch through an aviation plug-in, so that the functions of remote measurement and remote signaling are realized, and the two-remote reconstruction is completed.
In order to realize the above functions, the device of the present invention is realized as shown in fig. 1 to 3.
Fig. 1 is a structural diagram of the depth fusion type digital sensor device of the present invention, which is composed of three sets of poles and a control unit. The high-voltage inlet wire of each group of pole posts is provided with a single current sensor 1 and a zero sequence current sensor 2. The column below the current sensor is provided with a single-phase voltage sensor 3, a zero-sequence voltage sensor 4 and a power taking unit 5. The control unit part which is a cuboid below the three groups of poles mainly comprises a control unit 6 and a backup power supply 7.
The cylinder below the current sensor can be sealed as shown in fig. 2, and the cylinder is divided into 4 parts, namely, a single-phase voltage 3, a zero-sequence voltage 4, a power-taking unit 5 and an idle 8.
Fig. 3 is a schematic view of the installation of the depth fusion digital sensor device of the present invention. 10 is a wiring terminal partially illustrated by a pole-mounted switch, and 9 is a fixed terminal structure. Since the fixed terminal structure 9 meets the requirement of the equipment for stress, the equipment installation position is at the incoming terminal 10 of the pole top switch. The control unit of the device is connected with the pole-mounted switch by an aviation plug-in 12, and the interior of the device is connected with the sensor device by a connecting terminal.
In addition, a specific embodiment of the present invention for digital modification of a 10kV pole top switch is explained based on fig. 4.
As shown in fig. 4, the deep fusion type digital sensor device is composed of three current-voltage sensors 1, a zero-sequence current sensor 2, three voltage-voltage sensors 3, a zero-sequence voltage sensor 4, a power-taking unit 5, a backup power supply 6, and a control unit 7.
The current sensor design principle is as follows: the electromagnetic current transformer CT using the LPCT converts primary bus current into secondary small current through the CT, and secondary windings are divided into 2 groups. One group of sampling resistors are connected in series on the secondary side and used for collecting three currents; and the other group is used for zero-sequence current acquisition by connecting the three groups of secondary windings in parallel and then connecting sampling resistors in series. The secondary current is converted into a small voltage signal which is in direct proportion to the primary current and is output, and the signal is accessed into the control unit to be digitally processed.
Voltage sensor design principle: the voltage obtained by the high-voltage capacitor is connected with the low-voltage capacitor in series and grounded, and the output line is connected with the low-voltage capacitor in parallel to output a voltage signal divided by the low-voltage capacitor and used for collecting three voltages. In addition, the three groups of high-voltage capacitors are connected in parallel to obtain voltage, then the voltage is connected with the low-voltage capacitor in series and grounded, and the output circuit is connected with the low-voltage capacitor in parallel to output a voltage signal divided by the low-voltage capacitor and used for acquiring zero sequence voltage. The voltage signal is accessed to the control unit for digital processing.
The design principle of the electricity taking unit is as follows: this embodiment uses a B-phase line for example to take power, and the high voltage is converted to a lower voltage by the high voltage capacitor carrying the higher voltage, and then the low voltage capacitor is dropped to a smaller value. The output voltage end of the low-voltage capacitor is connected with a compensation reactor in series and then is transformed by a transformer to obtain a required voltage value.
The power taking unit has the power taking power of 3-5W, and is converted by the power management unit 11 to provide a working power supply for intelligent equipment such as the control unit 6 and the sensing unit and simultaneously perform charging and discharging management for the backup power supply 7.
The control unit 6 is a miniaturized FTU (feeder automation terminal). The control unit 6 processes the small signals collected by the voltage and current sensors in a centralized way to realize informatization and digitization. The control unit is connected with the pole-mounted switch through an aviation plug-in 12 and is used for transmitting state quantity and control signals and controlling the pole-mounted switch. The control unit also applies a plug-and-play technology based on an IEC 61850/CIM standard model, so that the control unit can be self-described and self-identified, and can carry out industrial Internet of things communication protocol mapping with the IEC CIM model of the main station, thereby realizing data transmission with the main station, realizing the plug-and-play function of the control unit, and reducing the labor cost of field operation and maintenance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (6)
1. A depth fusion digital sensor apparatus for digital retrofitting, characterized by:
the device consists of a voltage sensor, a current sensor, a self-powered unit, a detachable control unit and a backup power supply;
the voltage sensor and the current sensor collect three-phase voltage, three-phase current, zero sequence voltage and zero sequence current and transmit the three-phase voltage, the three-phase current, the zero sequence voltage and the zero sequence current to the control unit through the connecting terminal, the on-column switch is connected with the control unit through the aviation plug-in unit to transmit state quantity and control quantity, and the control unit is communicated with the master station to realize three-remote signal processing and transmission and realize digitization of the on-column switch;
the automatic power taking unit takes power from the high-voltage side of the switch, provides a working power supply for equipment, performs charge and discharge management on a backup power supply, and provides a power supply for the backup power supply when the switch is powered off and acts.
2. The depth fusion digital sensor apparatus for digital modification according to claim 1, wherein: the voltage sensor adopts a capacitance voltage division type; the high-voltage capacitor acquires voltage, the low-voltage capacitor is connected with the ground in series, and the low-voltage capacitor outputs a low-voltage signal through filtering processing.
3. The depth fusion digital sensor apparatus for digital modification according to claim 1, wherein: the current sensing adopts an electromagnetic current transformer CT of an LPCT, primary bus current is converted into secondary small current through the CT, a sampling resistor is connected in series with the secondary side of the CT, and the secondary current is converted into a small voltage signal which is in direct proportion to the primary current and is output.
4. The depth fusion digital sensor apparatus for digital modification according to claim 1, wherein: the self-powered unit adopts a high-voltage-dividing capacitor C1 and a low-voltage-dividing capacitor C2 to divide voltage and then outputs a voltage value through transformer transformation, and is configured with a backup power supply charging and discharging management module.
5. The depth fusion digital sensor apparatus for digital modification according to claim 1, wherein: the control unit can be installed or detached under the condition that primary equipment is not powered off; the control unit applies a plug-and-play technology based on an IEC 61850/CIM standard model, meets the functional requirements of a primary fusion technology and a secondary fusion technology on the feeder automation terminal, and realizes plug-and-play digital transformation of equipment.
6. The depth fusion digital sensor apparatus for digital modification according to claim 1, wherein: the novel backup power supply adopts a novel backup power supply with a small volume, and the selection type of the novel backup power supply comprises lithium titanate, a lithium capacitor and an oxidized alloy battery.
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| CN202110121616.4A CN112630523A (en) | 2021-01-28 | 2021-01-28 | Deep fusion type digital sensor equipment for digital reconstruction |
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| CN202110121616.4A CN112630523A (en) | 2021-01-28 | 2021-01-28 | Deep fusion type digital sensor equipment for digital reconstruction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113777385A (en) * | 2021-11-10 | 2021-12-10 | 浙江华采科技有限公司 | High-voltage and current combined sensor integrated with capacitive power supply |
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2021
- 2021-01-28 CN CN202110121616.4A patent/CN112630523A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113777385A (en) * | 2021-11-10 | 2021-12-10 | 浙江华采科技有限公司 | High-voltage and current combined sensor integrated with capacitive power supply |
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