CN215493795U

CN215493795U - 35kV integrated alternating current sensor for offshore wind power frequency division power transmission system

Info

Publication number: CN215493795U
Application number: CN202121181135.4U
Authority: CN
Inventors: 马洪亮; 韩伟; 邵会臣; 赵洪山
Original assignee: Shandong Fuao Electric Power Equipment Co ltd
Current assignee: Shandong Fuao Electric Power Equipment Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-01-11
Anticipated expiration: 2031-05-31

Abstract

The utility model provides a 35kV integrated alternating current sensor for an offshore wind power frequency division transmission system, which comprises a sensor shell, a terminal copper bar, an insulating support, a base and an aviation plug, wherein the sensor shell is provided with a wiring terminal copper bar, the bottom of the sensor shell is fixedly provided with the insulating support, the bottom of the insulating support is fixedly provided with the base, the bottom of the base is fixedly provided with the aviation plug, and the sensor shell is integrally cast by epoxy resin, is fireproof and flame-retardant, and has attractive appearance and high mechanical strength.

Description

35kV integrated alternating current sensor for offshore wind power frequency division power transmission system

Technical Field

The utility model relates to the technical field of electrical engineering measurement, in particular to a 35kV integrated alternating current sensor for an offshore wind power frequency division power transmission system.

Background

The national 'double-carbon' strategy proposes that the traditional energy sources such as coal, petroleum and the like need to be reduced in use, the clean energy requirements such as photovoltaic, wind power and the like are increased rapidly, the environment is worsened day by day, wind power generation is one of the energy acquisition modes with mature technology and the most development conditions in new energy, and offshore wind power is suitable for large-scale development and utilization due to the advantages of stable wind energy, rich resources, no land occupation and the like, and the offshore wind power mainly has three modes: high voltage alternating current transmission (HVAC), high voltage direct current transmission (HVDC), Fractional Frequency Transmission (FFTS). The high-voltage alternating-current transmission has short transmission distance and small capacity; the transmission distance of high-voltage direct-current transmission is long; the frequency division transmission reduces the transmission frequency, so the transmission distance is long and the capacity is large. The frequency division power transmission is the main research and application direction of future power transmission.

The traditional electrical measurement equipment is used for measuring under power frequency, the transmission frequency of a frequency division power transmission system is 1/3 power frequency, if the traditional electromagnetic voltage and current transformer is used for measuring, the system frequency is reduced to be 1/3, if the measurement is to be realized, the section of a magnetic core needs to be increased or the ampere-turn number of a coil needs to be increased, and therefore the material consumption of a product is increased, the volume is increased, and the cost is multiplied. The excessive volume causes the installation difficulty of customers, the use cost is increased, the method is contrary to the national guidelines for energy saving and consumption reduction, the frequency is reduced, the magnetic core is more easily saturated, and ferromagnetic resonance is more easily generated; and for the use and research of magnetic materials in the low-frequency field, the results which can be used for reference at home and abroad are few, long time is needed for the reliability research of products, and the research and development period and the research and development cost of the products are increased.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a 35kV integrated alternating current sensor for an offshore wind power frequency division power transmission system, which solves the problems mentioned in the background technology.

(II) technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a 35kV integration AC sensor for offshore wind power frequency division transmission system, includes sensor housing, terminal copper bar, insulating pillar, base and aviation plug, the last binding post copper bar that is equipped with of sensor housing, the fixed insulating pillar that is equipped with in sensor housing bottom, the fixed base that is equipped with in insulating pillar bottom, the fixed aviation plug that is equipped with in base bottom.

Preferably, the wiring terminal copper bar is in through connection with the sensor shell.

Preferably, the wiring terminal copper bar is provided with a wiring hole.

Preferably, four groups of fixed terminals are arranged at the bottom of the base.

Preferably, the aviation interface is a 5-pin aviation socket connector, 2 current signals, 2 voltage signals and one ground wire. An aviation plug interface (female port) is welded with a double-shielded sheath cable and is used for connecting a sensor to an intelligent test terminal.

Preferably, the voltage part of the sensor adopts a capacitance voltage division principle, and the high-voltage capacitor is connected with the low-voltage capacitor in series. The high-voltage capacitor adopts a high-voltage ceramic capacitor of 150pF, the low-voltage capacitor adopts a ceramic capacitor of 1.613 muF, and when the input phase voltage of the transformer is 35/√ 3kV, the two ends of the low-voltage capacitor of the sensor output a small signal with the voltage of 3.25/√ 3V.

Preferably, the current part of the sensor converts the high-voltage primary current into a small voltage signal by using a Rogowski coil scheme.

(III) advantageous effects

The utility model provides a 35kV integrated alternating current sensor for an offshore wind power frequency division power transmission system. The method has the following beneficial effects:

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

2. Compared with the traditional electromagnetic scheme, the product volume of the integrated alternating current sensor is greatly reduced.

3. According to the integrated alternating current sensor, the current part adopts a Rogowski coil scheme, the measurement range is fast, and the transient characteristic is good.

4. According to the integrated alternating current sensor, a voltage part adopts a capacitance voltage division scheme, a high-voltage capacitor is a high-voltage ceramic capacitor, and the integrated alternating current sensor is high in voltage withstanding value, wide in frequency band, good in linearity, good in temperature characteristic, high in stability and high in precision.

5. This integration ac 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 a secondary equipment.

6. By adopting the strut type structure, the current primary line is directly poured inside the product, so that the installation is convenient, and the stability of the product is increased.

Drawings

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

FIG. 2 is a schematic view of a base structure according to the present invention.

1, connecting terminal copper bars; 2. a sensor housing; 3. an insulating support; 4. a base; 5. an aviation plug; 6. and fixing the terminal.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, an embodiment of the present invention provides a 35kV integrated ac sensor for an offshore wind power frequency division power transmission system, including a sensor housing 2, a wiring terminal copper bar 1, an insulating pillar 3, a base 4, and an aviation plug 5, and characterized in that: be equipped with binding post copper bar 1 on sensor housing 2, the fixed insulating pillar 3 that is equipped with in 2 bottoms of sensor housing, the fixed base 4 that is equipped with in 3 bottoms of insulating pillar, the fixed aviation plug 5 that is equipped with in 4 bottoms of base.

Binding post copper bar 1 and 2 through connections of sensor housing, be equipped with the wiring hole on the binding post copper bar 1, 4 bottoms of base are equipped with four fixed terminal of group 6, aviation plug 5 is 5 needle aviation socket joints, 2 of current signal, 2 of voltage signal, one ground wire. The aviation plug interface female port welding double-shielding sheath cable is used for connecting a sensor to an intelligent test terminal, the voltage part of the sensor adopts a capacitance voltage division principle, and a high-voltage capacitor is connected with a low-voltage capacitor in series. The high-voltage capacitor adopts a high-voltage ceramic capacitor of 150pF, the low-voltage capacitor adopts a ceramic capacitor of 1.613 muF, when the input phase voltage of the transformer is 35/√ 3kV, the voltage of the two ends of the low-voltage capacitor of the sensor is 3.25/√ 3V, and the current part of the sensor adopts a Rogowski coil scheme to convert the high-voltage primary current into the small voltage signal.

This integration ac sensor, wholly adopt the epoxy pouring, it is fire-retardant to prevent fires, the outward appearance is beautiful, mechanical strength is high, the product volume reduces by a wide margin compared with traditional electromagnetic type scheme, the electric current part adopts the rogowski coil scheme, measuring range is fast, transient characteristic is good, voltage part adopts the electric capacity partial pressure scheme, high-voltage capacitor chooses for use high-voltage ceramic electric capacity, the withstand voltage value is high, the frequency band is wide, the linearity is good, temperature characteristic is good, stability is high, the precision is high, through aviation plug through shielded cable direct access to intelligent acquisition terminal, need not middle reconversion, conversion equipment in the middle has been saved, the efficiency is improved, the standardization of the interface of being convenient for, realize the integration of a secondary equipment, adopt the structure of strut type, the electric current is once line direct pouring inside the product, simple to operate promptly, product stability has been increased again.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a 35kV integration AC sensor for offshore wind power frequency division transmission system, includes sensor housing (2), binding post copper bar (1), insulating pillar (3), base (4) and aviation plug (5), its characterized in that: be equipped with binding post copper bar (1) on sensor housing (2), sensor housing (2) bottom is fixed and is equipped with insulating pillar (3), insulating pillar (3) bottom is fixed and is equipped with base (4), fixed circular connector (5) that are equipped with in base (4) bottom.

2. The 35kV integrated alternating current sensor for the offshore wind power frequency division transmission system according to claim 1, wherein: the wiring terminal copper bar (1) is in through connection with the sensor shell (2).

3. The 35kV integrated alternating current sensor for the offshore wind power frequency division transmission system according to claim 1, wherein: and the wiring terminal copper bar (1) is provided with a wiring hole.

4. The 35kV integrated alternating current sensor for the offshore wind power frequency division transmission system according to claim 1, wherein: four groups of fixed terminals (6) are arranged at the bottom of the base (4).

5. The 35kV integrated alternating current sensor for the offshore wind power frequency division transmission system according to claim 1, wherein: aviation plug (5) are 5 needle aviation socket joints, and 2 electric current signals, 2 voltage signals, one ground wire, aviation plug (5) interface female mouthful welding double-shielded sheath cable is used for connecting sensor to intelligent test terminal.

6. The 35kV integrated alternating current sensor for the offshore wind power frequency division transmission system according to claim 1, wherein: the voltage part of the sensor adopts a capacitance voltage division principle, a high-voltage capacitor is connected with a low-voltage capacitor in series, the high-voltage capacitor adopts a high-voltage ceramic capacitor of 150pF, the low-voltage capacitor adopts a ceramic capacitor of 1.613 mu F, and when the input phase voltage of the transformer is 35/√ 3kV, small signals of 3.25/√ 3V voltage are output at two ends of the low-voltage capacitor of the sensor.

7. The 35kV integrated alternating current sensor for the offshore wind power frequency division transmission system according to claim 1, wherein: the current part of the sensor converts the high-voltage primary current into a small voltage signal by using a Rogowski coil scheme.