CN202421272U

CN202421272U - Power transformer with high-voltage side electric energy acquisition signal

Info

Publication number: CN202421272U
Application number: CN2011203876033U
Authority: CN
Inventors: 薛建仁
Original assignee: NANJING SUTE ELECTRIC CO Ltd
Current assignee: NANJING SUTE ELECTRIC CO Ltd
Priority date: 2011-10-13
Filing date: 2011-10-13
Publication date: 2012-09-05
Anticipated expiration: 2021-10-13

Abstract

According to a power transformer with high-voltage side electric energy acquisition signals, a three-phase input high voltage sensor and current sensors are provided, three high-voltage attenuators are respectively connected to the high-voltage input terminal of the power transformer, three current sensors are respectively connected to a high-voltage input circuit, the output signals of three attenuators and the output signals of three current sensors are connected to a signal wire leading-out terminal, the output signals of the three attenuator and the three current sensors are connected to the voltage and current terminal of a three-phase electric energy meter, and the high-voltage side electric energy metering is realized.

Description

Power transformer with high-pressure side electric energy acquisition signal

Technical field:

The utility model relates to the power transformer with high-pressure side power measurement function, belongs to field of electrical equipment, particularly has the power transformer of high-pressure side electric energy acquisition signal.

Background technology:

User's electric energy metrical is divided into a high-pressure side metering and low-pressure side metering dual mode: the metering of existing high-pressure side is to be measured by electric energy meter through primary side voltage and current mutual inductor; The loss of its power transformer counts electric energy meter, can according to the facts collect the loss of power transformer; The low-pressure side metering is that the low pressure output of power transformer supplies the user via electric energy meter metering back, and the loss of power transformer can not count electric energy meter, and power department is then collected the loss of power transformer according to certain ratio.

The energy-saving power transformer has reduced the loss of power transformer, and is great to the electrical network energy-saving significance; If still the power consumer more than 90% is adopted the low-pressure side metering, these users can not get energy-saving power The Energy Conservation of Transformer income, and the enthusiasm of promoting the energy-saving power transformer is had certain influence.

The utility model content:

The utility model proposes to have the power transformer of high-pressure side electric energy acquisition signal, and the electric energy acquisition signal of its output is connected with three-phase electric energy meter, can realize the high-pressure side electric energy metrical one time.

The utility model implementation method is: this power transformer apparatus has three-phase input high pressure sensor and current metering sensor, and its high pressure sensor is a condenser divider, and current sensor is a current transformer; Three high-voltage bleeders are received the high voltage input terminal of power transformer respectively, and three current sensors insert respectively in the high pressure input circuit, the output signal leading-out wire terminal of the output signal of three road voltage dividers and No. three current sensors; The output signal of three road voltage dividers and the output signal of No. three current sensors are connected with the voltage and current terminals of three-phase electric energy meter, realize the high-pressure side electric energy metrical.

The three-phase high-voltage insulator of the oil-immersed power transformer structure in the utility model is respectively the insulator of built-in voltage divider and current sensor composite structure; The high-voltage arm of built-in voltage divider is the multilayer ganged condenser, and the extension line of the capacitor of its innermost layer is the junction pole of high-tension insulator; Its current transformer is an electromagnetic current transducer, and it is enclosed within the bottom of high-tension insulator.

The three-phase high-voltage outlet supporting insulator of the dry-type power transformer structure in the utility model; Supporting insulator for the built-in capacitance voltage divider arrangement; Its voltage divider is the voltage divider of many capacitances in series structures; The high-pressure side of its capacitive divider is connected with high-voltage connection, and the cold end of its capacitive divider is connected with the upper clamping piece of dry-type power transformer, and its upper clamping piece is connected with the earth potential of power transformer.

The advantage of the utility model: adopt the high-pressure side metering of method realization easily electric energy, can let the user obtain energy-saving power The Energy Conservation of Transformer income, positive effect is arranged to promoting the energy-saving power transformer.

Description of drawings

Fig. 1 is the principle schematic of the utility model;

Fig. 2 is the high-tension insulator diagrammatic cross-section of the oil immersed power transformer of the utility model;

Fig. 3 is the supporting insulator diagrammatic cross-section of the dry-type power transformer of the utility model;

Fig. 4 is the oil immersed power transformer synoptic diagram of the utility model;

Fig. 5 is the dry-type power transformer synoptic diagram of the utility model;

Among the figure in 1 A, B and C be high voltage input terminal of power transformer three-phase; A, b and c are power transformer three-phase low-voltage outputs; VA, VB and VC are power transformer three-phase high-voltage voltage divider output signals, the 0th, and the ground wire of voltage divider output signal; IA, IB and IC are power transformer threephase current transformer output signals; Voltage output and current output signal connect electric energy meter, just can realize high-voltage electric energy measurement one time.

1 is the insulator junction pole among Fig. 2; The 2nd, the insulation course of coaxial capacitance is represented with fine rule among the figure; The 3rd, the metal level of coaxial capacitance is represented with thick line among the figure; 4, be the metal outer of coaxial capacitance, connect voltage divider lead-out terminal and low-voltage arm electric capacity, the ground of an other termination transformer of low-voltage arm electric capacity; The 5th, the voltage divider lead-out terminal; 6, be current output terminal; 7, be the external insulation of insulator; 8, be low-voltage arm electric capacity; The 9th, current transformer.

10 is busbar fixed screw holes of supports insulative among Fig. 3; The 11st, the external insulation of insulator; The 12nd, voltage divider high-voltage arm electric capacity; 13, be the output signal of voltage divider; 14, be low-voltage arm electric capacity; The 15th, the fixed screw holes of supporting insulator and upper clamping piece.

Embodiment

Accompanying drawing discloses the basic structure of the utility model without limitation, and Fig. 4 and Fig. 5 are to be the explanation of example with the triangle transformer device structure, use shown in it, are equally applicable to laminated core transformer and amorphous transformer type.

Fig. 4 is the application examples of the utility model on oil immersed power transformer; It does not change the agent structure of oil immersed power transformer; Only changed existing insulator in the utility model built-in voltage divider and the insulator of current sensor; Shown among the figure 16,17 is the section signal of this insulator; Fig. 5 is the application examples of the utility model on dry-type power transformer, and it has changed original supporting insulator in the utility model supporting insulator of built-in voltage divider, and shown among the figure 18,19 is the section signal of this supporting insulator among the figure; 20 is current transformer among the figure, and 21 are the signal of current transformer sectional view.

Claims

1. power transformer with high-pressure side electric energy acquisition signal; Its technical characterictic is: this power transformer apparatus has three-phase input high pressure sensor and current metering sensor; Its high pressure sensor is a condenser divider, and current sensor is a current transformer; Three high-voltage bleeders are received the high voltage input terminal of power transformer respectively; Three current sensors insert respectively in the high pressure input circuit; The output signal leading-out wire terminal of the output signal of three road voltage dividers and No. three current sensors, the output signal of three road voltage dividers is connected with the voltage and current terminals of outside three-phase electric energy meter with the output signal of No. three current sensors.

2. power transformer according to claim 1; Its technical characterictic is: this power transformer is an oil-immersed power transformer; The three-phase high-voltage insulator of this oil-immersed power transformer is respectively the insulator of built-in voltage divider and current sensor composite structure; The high-voltage arm of built-in voltage divider is the multilayer ganged condenser, and the extension line of the capacitor of its innermost layer is the junction pole of high-tension insulator; Its current transformer is an electromagnetic current transducer, and it is enclosed within the bottom of high-tension insulator.

3. power transformer according to claim 1; Its technical characterictic is: this power transformer is a dry-type power transformer; The three-phase high-voltage outlet supporting insulator of this dry-type power transformer; Be the supporting insulator of built-in capacitance voltage divider arrangement, its voltage divider is the voltage divider of many capacitances in series structures, and the high-pressure side of its capacitive divider is connected with high-voltage connection; The cold end of its capacitive divider is connected with the upper clamping piece of dry-type power transformer, and its upper clamping piece is connected with the earth potential of power transformer.