CN206386678U - A kind of SF6 electric equipment systems and its making-up air device - Google Patents

Abstract

The application provides a SF6 electrical equipment system and a gas supply device thereof, the gas supply device includes: an SF6 gas density sensor and an automatic gas supply device connected to the gas charging interface of the SF6 electrical equipment, and one end is connected to the SF6 gas The density sensor is connected, and the other end is connected with the central processing unit of the automatic gas supply device. The gas supply device monitors the gas density in the SF6 electrical equipment in real time through the SF6 gas density sensor, and transmits the detected data to the central processing unit. The central processing unit compares the collected data with the preset value, and when it is less than the preset value , to send a signal to the automatic air supply device, so that the automatic air supply device can automatically supply air to the SF6 electrical equipment, avoiding manual air supply, thereby improving work efficiency, and avoiding GIS caused by untimely operation Breakdown failure.

Description

A kind of SF6 electrical equipment system and its gas supply device

technical field

The present application relates to the technical field of power systems, in particular to an SF6 electrical equipment system and an air supply device thereof.

Background technique

Sulfur hexafluoride (SF6) has very good insulation and arc extinguishing capabilities, so it is widely used in power systems. At present, in my country's 63 ~ 750KV power system, the application of SF6 gas insulated circuit breakers and SF6 gas insulated substations (GIS) is quite extensive, so the daily supervision of SF6 electrical equipment is becoming more and more important.

The GIS gas chamber online monitoring system can monitor the temperature, humidity, and density of SF6 gas in real time, and can pre-judge abnormalities such as gas chamber leakage, which can greatly reduce GIS breakdown failures. However, due to the large number of SF6 electrical equipment and long-term operation, air leakage often occurs, which requires regular air replenishment for SF6 electrical equipment.

Most of the current gas replenishment methods use manual operation of the gas filling valve. During the gas replenishment process, due to the negligence of the staff, the gas supply pressure is too high, resulting in the impact of the air flow in the SF6 power transformer in live operation, resulting in the breakdown of the power SF6 power transformer. Accidents, or even the danger of explosion; if the pressure of the supply air source is insufficient, causing gas to be poured out, it will also lead to accidents or even the danger of explosion of the electric SF6 transformer in live operation.

Utility model content

In view of this, the present application provides an SF6 electrical equipment system and its gas supply device, so as to avoid the operation of manual gas supply in the prior art, thereby not only improving work efficiency, but also further reducing the occurrence of accidents.

In order to achieve the above object, the application provides the following technical solutions:

A gas replenishing device for an SF6 electrical equipment system, comprising:

SF6 gas density sensor and automatic gas supply device connected to the gas filling interface of SF6 electrical equipment;

One end is connected with the SF6 gas density sensor, and the other end is connected with the central processing unit of the automatic gas supply device.

Preferably, the automatic air supply device includes: an SF6 gas cylinder, a pressure reducing valve including a first temperature sensor, an air supply valve including a second temperature sensor, and a power supply.

Preferably, it also includes: an upper-level monitoring system connected to the intermediate processor.

Preferably, it also includes: a micro-water monitoring device and a gas component monitoring device, one end of which is connected to the gas charging interface of the SF6 electrical equipment, and the other end is connected to the central processing unit.

Preferably, it also includes: an SF6 gas purification device connected to the gas charging interface of the SF6 electrical equipment and the central processing unit at the same time.

Preferably, it also includes:

gas recovery unit;

The first port is connected with the SF6 gas purifying device, the second port is connected with the charging interface of the SF6 electrical equipment, and the third port is connected with the three-way valve of the gas recovery device.

A SF6 electrical equipment system, comprising: SF6 electrical equipment and any one of the above-mentioned air supply devices.

As can be seen from the above technical solutions, the application provides a SF6 electrical equipment system and a gas supply device thereof, the gas supply device comprising: an SF6 gas density sensor and an automatic gas supply device connected to the gas filling interface of the SF6 electrical equipment, and, One end is connected with the SF6 gas density sensor, and the other end is connected with the central processing unit of the automatic gas supply device. The gas supply device monitors the gas density in the SF6 electrical equipment in real time through the SF6 gas density sensor, and transmits the detected data to the central processing unit. The central processing unit compares the collected data with the preset value, and when it is less than the preset value , to send a signal to the automatic air supply device, so that the automatic air supply device can automatically supply air to the SF6 electrical equipment, avoiding manual air supply, thereby improving work efficiency, and avoiding GIS caused by untimely operation breakdown fault.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a schematic structural diagram of an air supply device provided in Embodiment 1 of the present application;

Fig. 2 is a schematic structural diagram of an air supply device provided in Embodiment 2 of the present application;

Fig. 3 is a schematic structural diagram of an SF6 electrical equipment system provided in Embodiment 3 of the present application.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In order to avoid the operation of manual air supply in the prior art, thereby not only improving work efficiency, but also further reducing the occurrence of accidents, the application provides a SF6 electrical equipment system and an air supply device thereof, the specific scheme is as follows:

Embodiment one

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of an air supply device provided in Embodiment 1 of the present application. The air supply device includes:

An SF6 gas density sensor 102 and an automatic gas supply device 103 connected to the gas charging interface 101 of the SF6 electrical equipment;

One end is connected to the SF6 gas density sensor 102 and the other end is connected to the central processing unit 104 of the automatic gas supply device 103 .

Specifically, the SF6 gas density sensor 102 is connected to the gas filling interface 101 of the SF6 electrical equipment, monitors the gas density in the SF6 electrical equipment in real time, and transmits the detected data to the central processing unit 104, and the central processing unit 104 receives the data , and when it is found that the received data is less than the preset gas density value, a signal is sent to the automatic gas supply device 103, so that the automatic gas supply device 103 replenishes SF6 gas for the SF6 electrical equipment through the gas filling interface 101 of the SF6 electrical equipment.

It should be noted that this application is intended to protect the connections between the gas filling interface 101, the SF6 gas density sensor 102, the automatic gas supply device 103 and the central processing unit 104, as well as the entire system that constitutes it, and does not intend to protect these connections. Any improvement is made inside the component, wherein the control operation process of the central processor 104 is an existing technology, specifically, reference may be made to the scheme in which the central processor collects signals in the prior art and outputs corresponding instructions when the collected signal is found not to meet the conditions.

As can be seen from the above technical solutions, Embodiment 1 of the present application provides a kind of gas supply device of SF6 electrical equipment system, and this gas supply device comprises: SF6 gas density sensor and automatic gas supply device connected to each other with the gas filling interface of SF6 electrical equipment, And, a central processing unit that is connected with the SF6 gas density sensor at one end and connected with the automatic gas supply device at the other end. The gas supply device monitors the gas density in the SF6 electrical equipment in real time through the SF6 gas density sensor, and transmits the detected data to the central processing unit. The central processing unit compares the collected data with the preset value, and when it is less than the preset value , to send a signal to the automatic air supply device, so that the automatic air supply device can automatically supply air to the SF6 electrical equipment, avoiding manual air supply, thereby improving work efficiency, and avoiding GIS caused by untimely operation breakdown fault.

Embodiment two

On the basis of the first embodiment, the present application provides a more specific air replenishing device, as shown in FIG. 2 . In addition to the gas filling device including the gas filling interface 101 of the SF6 electrical equipment shown in Figure 1, the SF6 gas density sensor 102, the automatic gas supply device 103, and the central processing unit 104, it also includes: the last one connected to the intermediate processor 104 The level monitoring system 105 is used to receive the information sent by the central processing unit 104, such as real-time gas density data in the SF6 electrical equipment, the time of gas replenishment operation, etc., so that the staff can monitor.

The gas replenishing device in this embodiment also includes: one end is connected to the gas charging interface 101 of the SF6 electrical equipment, and the micro water monitoring device 106 and the gas component monitoring device 107 are connected to the central processing unit 104 at the other end.

Wherein, micro-water monitoring device 106 can be SF6 Micro-water tester, also can select micro-water sensor for use, specifically do not limit, can be selected according to actual conditions; Gas component monitoring device 107 can be SF6 gas decomposition product analyzer, You can also choose a SF6 gas purity tester, which is not specifically limited, and those skilled in the art can choose according to the actual situation, as long as it can realize the detection of the SF6 gas content in the SF6 electrical equipment.

Moisture monitoring device 106 and gas component monitoring device 107 are used to collect state information such as micro-water content and gas composition of SF6 gas in the gas chamber of SF6 electrical equipment, and the state information that collects is sent to central processing unit 104, and central processing unit simultaneously The controller 104 can also send the status information to the upper-level monitoring system 105.

When the central processing unit 104 finds that the collected state information does not meet the preset conditions, that is, when it is found that the micro-water content of the SF6 gas in the air chamber of the SF6 electrical equipment is higher than the micro-water content preset value, or the purity of the SF6 gas is lower than the purity preset value , the solution provided in the embodiment of the present application can also purify the SF6 gas in the air chamber of the SF6 electrical equipment. Specifically, the device also includes: an SF6 gas purification device 108 connected to the gas charging interface 101 of the SF6 electrical equipment and the central processing unit 104 at the same time. When the central processing unit 104 finds that the SF6 gas in the gas chamber of the SF6 electrical equipment needs to be purified, it sends a corresponding instruction to the SF6 gas purification device 108, so that the SF6 gas purification device 108 carries out the purification operation to the SF6 gas, and will purify the qualified SF6 The gas is flushed back to the SF6 electrical equipment. For specific operations of the central processing unit 104, reference may be made to the prior art, which will not be repeated in this application.

Specifically, this embodiment may also include: a gas recovery device 109 and a three-way valve 110, wherein the first port of the three-way valve 110 is connected to the SF6 gas purification device 108, and the second port is connected to the gas charging interface 101 of the SF6 electrical equipment The third port is connected to the gas recovery device 110 . The purified SF6 gas is flushed back to the SF6 electrical equipment through the three-way valve 110, and the unqualified SF6 gas is recovered to the gas recovery device 109 through the three-way valve 110; And when it continues to enter the gas recovery device 109, the state information is analyzed and processed by the central processing unit 104, and then the automatic gas supply device 103 performs the gas supply operation.

Specifically, the automatic gas supply device provided in this application may include: an SF6 gas cylinder, a pressure reducing valve including a first temperature sensor, a gas supply valve including a second temperature sensor, and a power supply.

As can be seen from the above technical solutions, the gas supply device provided in the second embodiment of the present application is provided with an automatic gas supply device. When the gas supply is needed, the automatic gas supply device automatically supplies the SF6 electrical equipment at any time, avoiding personnel Frequent gas replenishment not only improves work efficiency, but also avoids GIS breakdown failure caused by untimely gas replenishment operation; due to the installation of SF6 gas purification device, when the micro-water content or decomposed components exceed the standard and need to be purified, by The SF6 gas purification device purifies the SF6 gas. The purified SF6 gas is flushed back to the SF6 electrical equipment through the three-way valve, and the unqualified SF6 gas is recycled to the gas recovery device; When the SF6 gas exceeds the standard seriously and continues to enter the gas recovery device, the status information will be analyzed and processed by the central processor, and the automatic gas supply device will perform the gas supply operation, which can effectively utilize SF6 gas resources.

Embodiment three

The present application also provides an SF6 electrical equipment system. Compared with the SF6 electrical equipment in the prior art, the present application adds a set of automatic air supply device, so as to realize automatic air supply to the SF6 electrical equipment. The system includes: SF6 electrical equipment 201 and the gas replenishing device 202 as described in any one of the above embodiments.

Wherein, the SF6 electrical equipment is the existing SF6 electrical equipment, and the details of the air supply device can refer to the descriptions of Embodiment 1 and Embodiment 2, and will not be repeated in this embodiment.

For the specific control process in this application, reference may be made to the prior art. This application only protects the connection relationship between components and the entity structure formed by the link relationship.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. a kind of making-up air device of SF6 electric equipment systems, it is characterised in that including：

The SF6 gas density is sensor and automatic air supply device that inflatable interface is connected are taken with SF6 electrical equipments；

One end is connected with the SF6 gas density is sensor, the central processing unit that the other end is connected with the automatic air supply device.

2. making-up air device according to claim 1, it is characterised in that the automatic air supply device includes：SF6 gas cylinders, bag Pressure-reducing valve containing the first temperature sensor, the aeration valve and power supply for including second temperature sensor.

3. making-up air device according to claim 1, it is characterised in that also include：What is be connected with the central processing unit is upper One-level monitoring system.

4. making-up air device according to claim 1, it is characterised in that also include：One end takes with the SF6 electrical equipments Inflatable interface is connected, micro- water monitoring device and gas component monitoring device that the other end is connected with the central processing unit.

5. making-up air device according to claim 4, it is characterised in that also include：Taken simultaneously with the SF6 electrical equipments The SF6 gas cleaning plants that inflatable interface is connected with the central processing unit.

6. making-up air device according to claim 5, it is characterised in that also include：

Gas concentration unit；

First port is connected with the SF6 gas cleaning plants, and second port takes inflatable interface phase with the SF6 electrical equipments Even, the triple valve that the 3rd port is connected with the gas concentration unit.

7. a kind of SF6 electric equipment systems, it is characterised in that including：SF6 electrical equipments and such as claim 1 to 6 any one Described making-up air device.