CN215180458U - Integrated electronic sensor for dry distribution transformer - Google Patents

Abstract

The utility model provides an integration electronic type sensor for dry-type distribution transformer, including dry-type distribution transformer and integration electronic sensor body, its characterized in that: integration electronic sensor body both ends are equipped with high voltage binding post, integration electronic sensor body upper end is equipped with the sensor housing, sensor housing bottom fixedly connected with insulating pillar, insulating pillar bottom is equipped with the base, the symmetry is equipped with the nut in the sensor housing, be equipped with the conducting rod between the nut, the sensor housing internal fixation is equipped with LPCT, be equipped with high-voltage capacitor in the insulating pillar, the insulating pillar internal fixation is equipped with low voltage capacitor, and its inside voltage sensor based on electric capacity partial pressure principle preparation and the current sensor based on LPCT preparation that has integrateed, the sensor output is voltage small-signal and electric current small-signal respectively, can directly connect to intelligent acquisition terminal through shielded cable, has possessed the perception function that electric power thing networking perception layer required.

Description

Integrated electronic sensor for dry distribution transformer

Technical Field

The utility model relates to an electrical engineering measures technical field, specifically is an integration electronic type sensor for dry-type distribution transformer.

Background

In document 1 issued by the national power grid in the early 2019, the construction of a three-type two-network and world-first-class energy internet is arranged at the head of the annual key work, namely the energy internet with three-in-one energy source flow, service flow and data flow is formed by a strong smart power grid bearing power flow and a ubiquitous power internet of things bearing data flow. The national grid company proposes to continue to build and operate a strong intelligent power grid which takes extra-high voltage as a backbone grid frame and coordinately develops power grids at all levels in the coming years, and the energy resource allocation capacity and the intelligent level are continuously improved; meanwhile, modern communication technologies such as big, cloud, thing, mobile and intelligent (big data, cloud computing, Internet of things, mobile Internet and artificial intelligence) are fully applied, and a ubiquitous power Internet of things with comprehensive sensing state, efficient information processing and convenient and flexible application is created. From the above architecture, the ubiquitous power internet of things comprises: a sensing layer, a network layer, a platform layer and an application layer. The distribution transformer directly faces to the user side, and with the development of town integration, the demand for the distribution transformer is larger and larger. The distribution transformer is the most important device of the sensing layer, the problem of data acquisition needs to be solved, and a series of information such as voltage, current temperature and the like of the sensing transformer needs to be provided for network layer devices. The method and the system have the advantages that the enterprise can monitor the running state of the transformer in real time, comprehensively detect the power grid according to the sensing information and provide big data support for optimizing power supply of the power grid.

In order to respond to the 'double-carbon' strategy of the country, the power consumption of products needs to be reduced, the country has already forced the increase of energy efficiency requirements on transformers, and energy efficiency identifiers must be added to outgoing transformers. The intelligent transformer at the present stage cannot realize real-time detection of transformer energy consumption.

At present, a point-of-use enterprise can sense the voltage and the current of the voltage measurement through an electric energy meter at a user end, but the point-of-use enterprise does not have the capability of sensing the voltage and the current information of the high voltage measurement for distribution transformers below 630 kVA. Due to the size of conventional electromagnetic transformers and the construction of dry distribution transformers, conventional electromagnetic transformers cannot be fitted to existing transformers.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides an integration electronic type sensor for dry-type distribution transformer has solved the problem of mentioning in the above background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides an integration electronic type sensor for dry-type distribution transformer, includes dry-type distribution transformer and integration electronic sensor body, its characterized in that: the integrated electronic sensor body is connected with the dry-type distribution transformer through a fixed terminal embedded in the base, an aviation plug is arranged on the base, high-voltage wiring terminals are arranged at two ends of the integrated electronic sensor body, a sensor shell is arranged at the upper end of the integrated electronic sensor body, an insulating support column is fixedly connected to the bottom of the sensor shell, the base is arranged at the bottom of the insulating support column, the aviation plug is fixedly arranged at the bottom of the base, nuts are symmetrically arranged in the sensor shell, a conductive rod is fixedly arranged between the nuts, an LPCT is fixedly arranged in the sensor shell, a high-voltage capacitor is fixedly arranged in the insulating support column, and a low-voltage capacitor is fixedly arranged in the insulating support column.

Preferably, the high-voltage wiring terminals at the two ends of the integrated electronic sensor body are connected through a conducting rod penetrating through the sensor shell.

Preferably, the integrated electronic sensor body current part uses LPCT, uses ultracrystalline alloy as a magnetic core, and converts high-voltage primary current into a small current signal of mA level.

Preferably, the integral electronic sensor body voltage part adopts a capacitance voltage division principle, the high-voltage capacitor is connected in series with a low-voltage capacitor, the high-voltage capacitor adopts a high-voltage ceramic capacitor of 150pF, the low-voltage capacitor adopts a ceramic capacitor of 461nF, and when the input phase voltage of the transformer is 10/√ 3kV, a small signal of 3.25/√ 3V is output at two ends of the low-voltage capacitor of the sensor.

Preferably, the bottom of the integrated electronic sensor body adopts a 5-pin aviation plug interface male port: 2 current signals, 2 voltage signals and one ground wire, wherein the aviation plug interface female port is welded with a double-shielding sheath cable for connecting the sensor to an intelligent test terminal.

(III) advantageous effects

The utility model provides an integration electronic type sensor for dry-type distribution transformer. The method has the following beneficial effects:

1. the integrated electronic sensor is integrally cast by epoxy resin, is fireproof and flame-retardant, and has attractive appearance and high mechanical strength.

2. According to the integrated electronic sensor, the current part adopts an LPCT scheme, the magnetic core is an ultracrystalline magnetic core, the linearity of the product is good within the range of 1% -120% of rated current, and the accuracy requirement of 0.2S level can be met. The temperature characteristic of the product is good, and the product can meet the environment temperature of minus 40 ℃ to 70 ℃.

3. According to the integrated electronic sensor, a voltage part adopts a capacitance voltage division scheme, a high-voltage capacitor is a high-voltage ceramic capacitor, the withstand voltage value is high, the frequency band is wide, the linearity is good, the temperature characteristic is good, the stability is high, and the accuracy requirement of 0.5/3P can be met.

4. This integration electronic type sensor directly connects to intelligent acquisition terminal through shielded cable through the aviation plug, need not middle reconversion, has saved middle conversion equipment, has improved efficiency, and the standardization of the interface of being convenient for realizes the integration of primary and secondary equipment.

5. The integrated electronic sensor is directly installed at the position of the insulator on the original side of the dry-type distribution transformer, the transformer does not need to redesign the structure of the transformer, and the research and development cost of a transformer manufacturer is saved.

Drawings

FIG. 1 is a schematic view of the installation of the sensor of the present invention;

FIG. 2 is a three-view diagram of the sensor of the present invention;

fig. 3 is a schematic view of the internal components of the present invention.

Wherein, 1, dry distribution transformer; 2. an integrated electronic sensor body; 3. a high-voltage wiring terminal; 4. a sensor housing; 5. an insulating support; 6. a base; 7. an aviation plug; 8. a base fixing terminal; 9. a conductive rod; 10. a nut; 11. an LPCT; 12. a high-voltage capacitor; 13. and a low-voltage capacitor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the embodiment of the present invention provides an integrated electronic sensor for dry distribution transformer, including dry distribution transformer 1 and integrated electronic sensor body 2, its characterized in that: integration sensor body 2 is connected with dry-type distribution transformer 1 through the embedded fixed terminal 8 of base 6, be equipped with aviation plug 7 on the base 6, 2 both ends of integration electronic sensor body are equipped with high voltage wiring terminal 3, 2 upper ends of integration electronic sensor body are equipped with sensor housing 4, sensor housing 4 bottom fixedly connected with insulating pillar 5, insulating pillar 5 bottom is equipped with base 6, the fixed aviation plug 7 that is equipped with in base 6 bottom, sensor housing 4 internal symmetry is equipped with nut 10, the fixed conducting rod 9 that is equipped with between the nut 10, sensor housing 4 internal fixation is equipped with LPCT11, insulating pillar 5 internal fixation is equipped with high-voltage capacitor 12, insulating pillar 5 internal fixation is equipped with low voltage capacitor 13.

The high-voltage wiring terminals 3 at two ends of the integrated electronic sensor body 2 are connected through a conducting rod 9 penetrating through the sensor shell 4, the current part of the integrated electronic sensor body 2 uses LPCT11, ultracrystalline alloy is used as a magnetic core, high-voltage primary current is converted into a small current signal of mA level, the voltage part of the integrated electronic sensor body 2 adopts a capacitance voltage division principle, and the high-voltage capacitor 12 is connected with the low-voltage capacitor 13 in series. The high-voltage capacitor 12 adopts a high-voltage ceramic capacitor of 150pF, the low-voltage capacitor 13 adopts a ceramic capacitor of 461nF, when the input phase voltage of the transformer is 10/√ 3kV, the two ends of the low-voltage capacitor of the sensor output 3.25/√ 3V small signals, and the bottom of the integrated electronic sensor body 2 adopts a 5-pin aviation plug 7 interface male port: 2 current signals, 2 voltage signals and one ground wire. The aviation plug 7 interface female port welding double-shielding sheath cable is used for connecting the sensor to the intelligent test terminal.

The utility model provides an integration electronic type sensor body 2 has adopted the support column structure, has replaced the support insulator of former transformer one side. The integrated electronic sensor body 2 is cast by epoxy resin, is fireproof and flame-retardant, and can meet the requirements of primary terminal support and insulation of the transformer on mechanical strength and insulating strength. Only need replace primary insulator with this integration electronic type sensor during the installation, under the prerequisite that does not produce the influence to the transformer structure, the perception of voltage and current information on the transformer primary side has been realized, and pass into information into intelligent measuring terminal through shielded cable, its inside voltage sensor based on electric capacity partial pressure principle preparation and the current sensor based on LPCT11 preparation of having integrateed, the sensor output is voltage small-signal and electric current small-signal respectively, can directly connect to intelligent acquisition terminal through shielded cable, conversion once more in the middle of need not, conversion equipment in the middle of having saved, the efficiency is improved, the standardization of the interface of being convenient for, realize the integration of a secondary equipment, the perception function that has possessed the requirement of electric power thing networking perception layer.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. An integrated electronic sensor for a dry distribution transformer, comprising a dry distribution transformer (1) and an integrated electronic sensor body (2), characterized in that: the integrated electronic sensor body (2) is connected with the dry-type distribution transformer (1) through a fixed terminal (8) embedded in a base (6), an aviation plug (7) is arranged on the base (6), high-voltage wiring terminals (3) are arranged at two ends of the integrated electronic sensor body (2), a sensor shell (4) is arranged at the upper end of the integrated electronic sensor body (2), an insulating support column (5) is fixedly connected to the bottom of the sensor shell (4), the base (6) is arranged at the bottom of the insulating support column (5), the aviation plug (7) is fixedly arranged at the bottom of the base (6), nuts (10) are symmetrically arranged in the sensor shell (4), conductive rods (9) are fixedly arranged between the nuts (10), an LPCT (11) is fixedly arranged in the sensor shell (4), and a high-voltage capacitor (12) is fixedly arranged in the insulating support column (5), and a low-voltage capacitor (13) is fixedly arranged in the insulating support column (5).

2. An integrated electronic sensor for a dry-type distribution transformer as recited in claim 1, wherein: the high-voltage wiring terminals (3) at the two ends of the integrated electronic sensor body (2) are connected through a conducting rod (9) penetrating through the sensor shell (4).

3. An integrated electronic sensor for a dry-type distribution transformer as recited in claim 1, wherein: the current part of the integrated electronic sensor body (2) uses LPCT (11), uses ultracrystalline alloy as a magnetic core, and converts high-voltage primary current into a small current signal of mA level.

4. An integrated electronic sensor for a dry-type distribution transformer as recited in claim 1, wherein: the voltage part of the integrated electronic sensor body (2) adopts a capacitance voltage division principle, the high-voltage capacitor (12) is connected with the low-voltage capacitor (13) in series, the high-voltage capacitor (12) adopts a high-voltage ceramic capacitor of 150pF, the low-voltage capacitor (13) adopts a ceramic capacitor of 461nF, and when the input phase voltage of the transformer is 10/√ 3kV, small signals of 3.25/√ 3V are output at two ends of the low-voltage capacitor of the sensor.

5. An integrated electronic sensor for a dry-type distribution transformer as recited in claim 1, wherein: integration electronic sensor body (2) bottom adopts 5 needle aviation plug (7) interface public mouths: 2 current signals, 2 voltage signals and one ground wire, wherein the aviation plug (7) interface female port welding double-shielding sheath cable is used for connecting the sensor to the intelligent test terminal.

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