CN105098644B - Outdoor switching station - Google Patents

Abstract

The invention discloses an outdoor opening and closing station, comprising: a ring network cabinet group, a power distribution automation cabinet and a casing, the ring network cabinet group and the power distribution automation cabinet are arranged in the casing, and the power distribution automation cabinet is located in the ring network cabinet group On the same side, the power distribution automation cabinet is equipped with multiple functional modules, and each functional module is assembled in a drawer type in the power distribution automation cabinet to form a drawer unit module. Compared with the prior art, the outdoor opening and closing station provided by the present invention can significantly solve the safety problems existing in the outdoor opening and closing station in the prior art, and can improve the power supply continuity of the outdoor opening and closing station at the same time, which can make the outdoor opening and closing station The switching station is produced as a standardized product, and the functional module equipment in the outdoor switching station can also be produced and designed as a standardized product, which is more conducive to the development and management of my country's smart grid, so the application prospect is very broad.

Description

outdoor shelter

technical field

The invention relates to a power distribution automation system, and more specifically relates to an outdoor switching station, which belongs to the technical field of electrical equipment automation.

Background technique

The power system includes several main links of power generation, power transmission, power transformation, and power distribution, among which power distribution is a function that directly faces power users. In my country, the situation of "emphasis on power generation, light supply, and no use" has been formed for a long time. The distribution network system is seriously backward, resulting in high loss of residential wires, low voltage, and unreliable power supply, which has become a bottleneck in the power supply and consumption of the power system. In the early stage of power grid construction, more attention was paid to power generation and transmission, while power distribution and power consumption were often underestimated. Therefore, in recent years, the state has invested a lot of money, and after several rounds of urban and rural network transformation, a large number of lines, switches and transformers have been transformed to carry out distribution network construction. As the carrier of urban and rural power supply, the distribution network's stability and security are directly related to the safety of power supply for thousands of households, and have important economic value and social significance. With the development of society and economy, the process of electricity marketization continues to deepen, and the user's requirements for the reliability and quality of electric energy are also constantly improving. The power supply radius of the urban power grid is getting shorter and shorter, and the power distribution room of the distribution network is widely used. The power distribution room of the distribution network is a key node for the self-healing and interaction of the distribution network. The construction mode of the "three remote" monitoring and feeder automation functions with a single function for the automation of the power distribution room is difficult to meet the development requirements of the intelligent distribution network automation. . The smart grid is another revolution in the power industry. It is a comprehensive solution to global and human energy, environment, climate, economy, and sustainable development. It represents the direction of future grid research and development. The distribution network is a window for electric energy applications and users, an important part of the smart grid, and an important breakthrough in the intelligentization of the grid.

Distribution automation refers to the use of modern electronics, communication technology, computer and network technology combined with power equipment to organically integrate the monitoring, protection, control, measurement and power supply department work management of the distribution network under normal and accident conditions. At the same time, improve the quality of power supply, establish a closer and more responsible relationship with users, meet the diversity of user requirements at a reasonable price, and strive for the best power supply economy. At present, most of the distribution automation systems based on communication network, feeder terminal unit and background computer network can also play the role of monitoring the operation status of the distribution network and changing the operation mode by remote control when the distribution network is in normal operation. Perceived, but most lack automatic control functions. Even if a small number of systems have automatic control functions, the system is too complex and redundant, which makes the cost high and is not suitable for popularization and application.

Before the reform and opening up, most cities had not yet formed a large load-intensive area, so most of the user's power was directly or indirectly sent to the user's transformer through the 10KV line from the substation. Connection is simple. However, in the past 20 years, the national economy has undergone rapid changes, cities tend to be denser and urbanized, and the power load of urban power grids has soared, forming a load-intensive area, and the load density has increased from the original hundreds of kW/km ² to Tens of thousands of kW/km ² , the original power supply method obviously exposed many weaknesses: long lines, large line loss, poor voltage quality; complex fault handling; heavy workload of line equipment operation, maintenance and management; difficulty in expanding capacity for new users; Due to urban planning requirements, it is becoming more and more difficult to erect corridors. It is difficult to meet the needs of urban development by directly connecting substation lines to users. Therefore, in recent years, a new power supply method has been proposed-to supply power to users through switching stations. The difference between these switching stations and substations is that there are no main transformers and open circuits device. In terms of distribution network wiring structure, the development trend is to use ring network power supply. The ring network power supply mode can improve the reliability of power supply. Users can obtain power from the ring network unit end of the switching station, reducing the blackout area of the accident. The ring network structure can be divided into single ring, multi-ring, and open-loop and closed-loop. According to different functions, the primary part of the single-loop and open-loop distribution network system can be divided into 5 modules; 1) Substation outlet circuit breaker; 2) Ring network line; 3) Ring network switch cabinet; 4) User 10KV distribution 5) user transformer. According to different combinations of ring network switchgear, user 10KV power distribution devices and user transformers, three different modes can be formed: ring network switch station, user substation and ring network user substation. In these modes, as the main equipment for ring network power supply— —Ring main unit is more and more valued by the power supply department and users.

The ring network cabinet is a set of high-voltage switchgear installed in a metal or non-metal insulated cabinet or made into an assembled interval ring network power supply unit. As a basic part of the urban distribution network, the safety of the ring network cabinet is the distribution An important guarantee for the safety of network feeders. In recent years, in urban power grids, power supply accidents due to ring main unit failures are not uncommon. Common failures of ring network cabinets include switch misoperation, protection refusal to operate, external force damage, switch gas leakage, cable head heat explosion, etc. The existing effective way to solve this problem is to install the distribution automation remote terminal DTU, the corresponding communication terminal ONU, and the microcomputer protection and control module set on the top of the ring network cabinet group to realize it. In the prior art, these automation function modules are divided into distributed structure and centralized structure. There are two ways to install the automatic function modules of the distributed structure: one is to install such automatic function modules inside the ring network cabinet, but there are 10000V high-voltage equipment inside the ring network cabinet, and the space arrangement of DTU and ONU Difficult, even if it can be installed, it is difficult to ensure complete and stable operation; the other is to attach this type of automation function module to the outside of the switch cabinet, and the random placement of this type of automation function module will cause the operation equipment to be placed in disorder Maintenance work has a certain impact. For the centralized structure, such functional modules are independently concentrated in a protective device cabinet, such as the existing cabinet-type DTU closed equipment, and the DTU cabinet body is equipped with a main control chip and connected with each circuit in the ring network cabinet. Connect the outlets of the outlets to the DTU and ONU respectively to monitor the ring main unit by using the DTU and ONU to avoid or eliminate the failure of the ring main unit. However, with the development of urban economy, the requirements for primary equipment such as ring network cabinets are getting higher and higher, and the shortcomings of existing technologies are becoming more and more obvious. For example, ring network cabinets usually have multiple outlets, while DTUs and ONUs can only be fixed In a certain position in the ring network cabinet, when using cables to connect each outlet of the ring network cabinet to the DTU and ONU, the cable routing distance is too long, the structure is complex, and the safety is poor; and when one outlet fails, It will affect the monitoring of all other outgoing lines, causing the entire ring network cabinet to fail to work normally. Figure 1 and Figure 2 are the front view and cross-sectional view of the outdoor switching station in the prior art, as shown in Figure 1 and Figure 2: the microcomputer protection and control module placed on the top of the ring network cabinet is fixedly connected to the ring network cabinet On the group, the internal wiring is chaotic; and this functional module is prone to failure due to its protective function, and the functional module needs to be replaced. What's more, even the entire switching station is powered off, which seriously affects the continuity and safety of the power supply of the distribution network; in addition, as shown in Figure 2, there is a lot of wasted space on the rear side of the functional module, which cannot be fully utilized.

Due to its own structural reasons, environmental problems, installation problems, etc., the outdoor switching station will affect the accuracy of the secondary equipment, resulting in misoperation of the secondary equipment, increasing the number of power outages, expanding the power outage area, and increasing the maintenance workload. When it is necessary to overhaul the secondary equipment, the anti-misoperation will generally cut off the power of the primary unit or the entire ring network cabinet. When secondary equipment is faulty and requires a lot of troubleshooting and maintenance, it is necessary to detect one by one to determine the location of the fault, and then replace the component that caused the fault, and perform a large number of secondary wiring and adjustment work, which will Greatly expand the blackout area and extend the blackout time. And due to different manufacturers and power distribution schemes, the components used in various types of outdoor switching stations are often different, and the sizes cannot be unified, resulting in the components in outdoor switching stations not being universal and interchangeable. During maintenance, if the fault is determined on site, it may not be possible to find suitable replacement parts in time, and the power supply cannot be restored in a short time, which cannot meet the requirements of modern power supply. It is impossible for all the ring network cabinets and outdoor switch stations in use to be damaged, repaired or replaced, and it is impossible for the power supply operation unit to understand and know all the ring network cabinets and outdoor switch stations of all manufacturers, and cannot There are backups of components in outdoor switchgears and ring network cabinets of different types, different manufacturers, and different power distribution schemes, so that when the ring network cabinet and outdoor switchgear fail, the corresponding components cannot be found in time Replacement, resulting in the inability to provide high-reliability and continuous power supply. However, in today's society, it is advocated to improve the construction of distribution network automation, and high reliability and continuous power supply is also the basis of distribution network automation. The length of power outage directly affects the direct economic loss of the power supply unit. For the economic society that is constantly improving electrification, reliable and continuous power supply is especially important. The loss of users may far exceed the loss of electricity charges. Reliable and continuous power supply will become an important measure of power supply contracts. standard. Therefore, only by improving the standardization and modularization of equipment can the general and interchangeability be improved. However, these manufacturers and the equipment in use have a long history, and cannot achieve high standardization and modularization for a while. Some improvements have been made to the outdoor opening and closing station in the prior art: for example, CN 202509989 discloses an outdoor opening and closing station, only a simple structural improvement is made on the door, and the original folding door is changed to a left and right sliding door; Chinese patent CN103715616 discloses a ring network cabinet, which simplifies the overall design of the ring network cabinet to simplify the internal wiring and reduce the installation workload, and does not improve the internal structure of the microcomputer protection and control module placed on the top of the ring network cabinet; For example, Chinese patent CN203367797 discloses a kind of intelligent power distribution automation terminal box. The automation terminal box is divided into a primary room and a secondary room. A distribution network automation ring network cabinet, which includes several ring network cabinets, DTU cabinets and communication cabinets, but the structures in the DTU cabinets and communication cabinets have not been improved; as Chinese patent CN103579946 discloses a distribution network automation integrated The ring network cabinet integrates the distribution network automation intelligent terminal and switchgear, but does not improve the structure of the automation intelligent terminal.

To sum up, the improvement of the outdoor switching station in the prior art is nothing more than improving the connection mode of the line, or only improving a certain part for simple structural improvement, and does not reduce the power failure area and reduce the power failure time. Fundamentally improved.

In addition, as the country standardizes the power industry, all power equipment must meet the national grid standards; but at present, due to the different manufacturers of power equipment, the power equipment produced is also different, resulting in With the development of the national grid, the national grid standards have been unified, so all manufacturers must transform the switch stations that have been put into use in accordance with the national grid standards, that is, rearrange the wiring of all equipment in the outdoor switch stations, which is equivalent to reorganizing The equipment was pulled back to the factory for re-production, which brought certain difficulties to the unification of the national grid standards, and did not fundamentally solve the national grid's transformation requirements for distribution network automation.

Therefore, it is an urgent problem to be solved in the prior art to provide an outdoor switchgear with good power supply continuity and safety.

Contents of the invention

In view of the above-mentioned problems existing in the prior art, an object of the present invention is to provide an outdoor switchgear with excellent power supply continuity and safety. , easy to replace, and its functional modules are relatively independent and do not affect each other. By improving the structure to realize component failure, the power failure time is short or only a short power failure to replace the unit module to realize the replacement of the faulty equipment, ensuring the continuity of power supply, especially It is to ensure the continuity of power supply without affecting other functional modules, that is, to improve the reliability of continuous power supply.

For realizing above-mentioned purpose of the invention, the technical scheme that the present invention adopts is as follows:

The outdoor switching station includes ring network cabinets, power distribution automation cabinets and shells. The ring network cabinets and power distribution automation cabinets are arranged in the shell, and the power distribution automation cabinets are on the same side of the ring network cabinets. A plurality of functional modules are provided, and each functional module is assembled in a drawer type in the power distribution automation cabinet to form a drawer unit module.

Preferably, the ring network cabinet group includes PT power supply cabinets, incoming line ring network cabinets and outgoing line ring network cabinets. The PT power supply cabinets and each ring network cabinet are each a ring network cabinet circuit. The power management module in the PT power supply cabinet is set In the power distribution automation cabinet, it provides battery charging power or operating power for incoming and outgoing line motor mechanisms.

Preferably, the power distribution automation cabinet includes a cabinet body and a plurality of drawer-type cabinets, the cabinet body and the drawer-type cabinets are flexibly connected, and the drawer-type cabinets are located in the cabinet; in addition, the cabinet body and the drawer-type cabinets are preferably plug-in electrical connections , At this time, when the functional module fails, the corresponding drawer cabinet can be taken out for replacement, which is simple and convenient.

Preferably, the corresponding drawer unit module includes each functional element required in the corresponding functional module, each functional element is uniformly installed in the drawer cabinet, and the entire drawer unit module is used as a standard part.

In order to further reduce the volume of the equipment, preferably, the power distribution automation cabinet includes a first power distribution automation cabinet and a second power distribution automation cabinet, and the first power distribution automation cabinet and the second power distribution automation cabinet are respectively arranged on the same side of the ring network cabinet; The first power distribution automation cabinet and the second power distribution automation cabinet are arranged as front and rear cabinet bodies, and the cabinet bodies of the first power distribution automation cabinet and the second power distribution automation cabinet are relatively independent, and are formed by splicing or one-time molding; to achieve Make better and reasonable use of the space in the equipment, save floor space and reduce the height of the switchgear, distinguish the primary equipment and secondary equipment in the outdoor switchgear, and facilitate operation and management at the same time.

More preferably, the first power distribution automation cabinet and the second power distribution automation cabinet of the power distribution automation cabinet can be inserted into the cabinet body from the side and/or front of the power distribution automation cabinet respectively to realize electrical connection and corresponding functions .

More preferably, the first power distribution automation cabinet includes a first wiring terminal drawer unit module and several single-loop control and protection drawer unit modules. The primary equipment and secondary equipment are separated for easy operation and management.

Further, the number of single-circuit control protection drawer unit modules is consistent with the number of circuits or units of the ring network cabinet.

As a preferred embodiment, the first power distribution automation cabinet is equipped with 7 single-loop control and protection drawer unit modules; Cabinet control and protection drawer unit module, first outlet cabinet control and protection drawer unit module, second outlet cabinet control and protection drawer unit module, third outlet cabinet control and protection drawer unit module and fourth outlet cabinet control and protection drawer unit module, 7 single The arrangement order of the circuit control protection drawer unit modules is consistent with the circuit order of the ring network cabinet.

Further, the single-loop control protection drawer unit modules are respectively equipped with secondary components, which include but not limited to meters and control components, protection device (fault indication) installation, indicator lights, switch buttons, locks and handles.

Further, one side of the single-loop control protection drawer unit module is provided with at least one secondary plug-in, one end of the secondary plug-in is pluggable and electrically connected to the plug-in that matches the shape of the cabinet, and the other end of the secondary plug-in is connected to the first The first terminal block drawer unit module in the power distribution automation cabinet.

Furthermore, the quantity of the above-mentioned secondary plug-ins is set as required, not absolute; multiple secondary plug-ins are preferably arranged in rows.

Furthermore, terminal blocks and/or aviation plugs are used to connect the first terminal drawer unit module to the second power distribution automation cabinet or to the side of the ring network cabinet.

More preferably, the second power distribution automation cabinet includes a second terminal drawer unit module, a DTU protection integrated drawer unit module, an ONU communication integrated drawer unit module, and a power supply drawer unit module connected in sequence; wherein: the second terminal block drawer unit module Electrically connect with the first distribution automation cabinet respectively to obtain the data (and primary equipment operation data) of the first distribution automation cabinet; the DTU protection integrated drawer unit module is connected with the second wiring terminal drawer unit module to The feeder automation and relay protection of the electric automation cabinet; the ONU communication integrated drawer unit module is connected with the DTU protection integrated drawer unit module to collect data and communicate with the outside; the power supply drawer unit module is used to provide the second wiring terminal drawer unit module, DTU To protect the integrated drawer unit module, the ONU communication integrated drawer unit module and the power required by all secondary components, the power supply drawer unit module can be an integrated module including a charging module and a battery module.

Further, each drawer unit module in the second power distribution automation cabinet is provided with at least one secondary plug-in, one end of the secondary plug-in is connected to each functional element in the drawer unit module, and the other end of the secondary plug-in is connected to the second power distribution automation cabinet. Second terminal block drawer unit module.

Further, the connection between the second terminal drawer unit module and the first power distribution automation cabinet or the side of the ring network cabinet adopts terminal blocks and/or aviation plugs.

In addition, another object of the present invention is to provide an outdoor switchgear, in which the distribution automation cabinet can meet the national requirements for power equipment, especially the connection interface between distribution automation and ring network cabinets in the smart grid, so that The standardization and modularization of each functional module in the power distribution automation cabinet improves the universal rate and exchange rate of the entire outdoor switching station, shortens maintenance time, reduces power outage areas, and improves power supply continuity.

Generally speaking, the "three remotes" refer to remote signaling, telemetry, and remote control. The country proposes that the wiring must be connected in accordance with the standards of the "three remotes" system, that is, the technical requirements of the electrical interfaces in the secondary equipment meet the national grid standards. details as follows:

Figures 20 to 32 show the definitions and requirements of the electrical interfaces of the secondary equipment in the "three remotes" of the outdoor switching station provided by the present invention.

Figures 20-25 are the definitions and wiring requirements of the electrical interfaces of the secondary equipment of the "three remotes" when the terminal block connection mode is adopted in the outdoor switchgear provided by the present invention, see Figures 20-25 for details.

Figures 26-32 are the definitions and wiring requirements of the electrical interfaces of the secondary equipment of the "three remotes" when the aviation plug connection mode is adopted in the outdoor switching station provided by the present invention, see Figures 26-32 for details.

Preferably, the electrical connectors of each secondary device are set as shown in the above table, and the corresponding circuit connection modes are matched with the electrical interface connections.

Preferably, the outdoor switch provided by the present invention realizes monitoring and control functions by a unit monitoring terminal, and the monitoring information obtained by the unit monitoring terminal includes but is not limited to one or a combination of the following: remote signaling amount information , remote measurement information, remote control information, remote adjustment information and fault monitoring information.

Preferably, when the monitoring information includes fault monitoring information, a dedicated fault judgment module can be built in the unitary monitoring terminal, which is used to judge that a short circuit and/or a ground fault have occurred in the outgoing line according to the judgment basis, generate fault monitoring information, and The fault monitoring information is reported to the control terminal.

Another object of the present invention is to provide an outdoor switching station, which is simple and convenient to install and maintain. The inventor has improved the door opening structure of the distribution automation cabinet in any of the above-mentioned outdoor switching stations. , so that the installation of the outdoor switching station is simple, the location of maintenance can be accurately positioned, the maintenance time can be shortened, and the continuity of power supply can be improved.

Preferably, the door opening direction of the first distribution automation cabinet is the same as or different from the door opening direction of the second distribution automation cabinet, so that the side walls of the first distribution automation cabinet and the second distribution automation cabinet are matched with each other, Thereby the space can be further saved and the space can be rationally utilized. At the same time, different door openings can facilitate the accuracy of detection.

More preferably, the first power distribution automation cabinet and the ring network cabinet of the shell are provided with a door, and the second power distribution automation cabinet is provided with a door and an opposite side door on the side of the shell.

As another preferred embodiment, the casing can have a plurality of doors to distinguish multiple functional areas, and the casing is respectively equipped with the second power distribution automation cabinet door, the first power distribution automation cabinet door, and the ring network cabinet group cabinet door , The door of the outlet area of the ring network cabinet group is convenient for maintenance.

Another object of the present invention is to provide an outdoor switching station. In order to ensure a good working environment for the distribution automation cabinet, the inventor made improvements to the distribution automation cabinet of the outdoor switching station with any structure above, so that the entire distribution automation cabinet The working environment of the electric automation cabinet is excellent, prolonging the service life of the distribution automation cabinet.

Preferably, a set of temperature control device, a heating device and a heat dissipation device are provided in the power distribution automation cabinet, which is convenient for controlling the high temperature and low temperature in the power distribution automation cabinet, and is convenient for protecting and controlling components in hot and cold regions, ensuring distribution Excellent working environment for electric automation cabinets. As a preferred embodiment, the heating device is a heater, and the heat dissipation device is a fan.

Compared with the prior art, the present invention has the following advantages:

1. The primary equipment and secondary equipment in the outdoor opening and closing station are clearly separated, and its space utilization rate is improved, which is convenient for safe operation and management; in addition, the outdoor opening and closing station separates the primary equipment from the secondary equipment and separates the secondary equipment. Centralized placement of equipment can facilitate centralized control of its use environment, improve its maintenance and repair efficiency, thereby prolonging the service life of secondary equipment;

2. When a component fails by improving the structure, the power failure time is short or only a short power failure to replace the unit module to realize the replacement of the faulty equipment, ensuring the continuity of the power supply, especially without affecting other functional modules to ensure the continuity of its power supply, That is, to improve the reliability of continuous power supply;

3. The outdoor switchgear adopts standardized and modular functional equipment, and some non-standardized components are installed in standardized and modular equipment. When the equipment needs to be mass-produced, the standardized and modular design can improve the versatility of the equipment. sex and interchangeability;

4. The electrical interface definition and wiring requirements of each drawer unit are wired according to the national grid standard, which has strong applicability; the drawer-type functional unit provided by the present invention can be used as a standard part to easily realize the national grid standard, especially The terminal block and aviation plug in the national grid standard are applied to the wiring terminals of the drawer-type functional unit of the distribution automation cabinet in the present invention, so as to improve the applicability of the ring network cabinet;

5. The power distribution automation module in the outdoor switching station can realize the mechanism of centralized protection and convenient protection of the use environment, realize anti-interference, high temperature and low temperature control, and add fans and heaters to facilitate the control of components in hot and cold regions .

To sum up, the outdoor switching station provided by the present invention can significantly solve the safety problems existing in the outdoor switching station in the prior art, and at the same time can improve the power supply continuity of the outdoor switching station, and can use the outdoor switching station as a Standardized product production can also be used as a standardized product production design for each functional module equipment in the outdoor switchgear, which is more conducive to the development and management of my country's smart grid, so the application prospect is very broad.

Description of drawings

Fig. 1 is the front view of the outdoor switchgear in the prior art;

Fig. 2 is the side view of the outdoor switchgear in the prior art;

Fig. 3 is the front view of a preferred embodiment of the outdoor shelter provided by the present invention;

Fig. 4 is a top view of a preferred embodiment of the outdoor shelter provided by the present invention;

Fig. 5 is a top view of another preferred embodiment of the outdoor shelter provided by the present invention;

Fig. 6 is the front view of the first power distribution automation cabinet in the outdoor switching station provided by the present invention;

Fig. 7 is the front view of the second power distribution automation cabinet in the outdoor switching station provided by the present invention;

Fig. 8 is a side view of the distribution automation cabinet in the outdoor switching station provided by the present invention;

Fig. 9 is an assembly diagram of a preferred embodiment of the distribution automation cabinet in the outdoor switchgear provided by the present invention;

Fig. 10 is a partial enlarged view (A-A) of the distribution automation cabinet in the outdoor switching station provided by the present invention;

Fig. 11 is the partially enlarged view (A'-A') of the distribution automation cabinet in the outdoor switching station provided by the present invention;

Fig. 12 is a partial enlarged view (B-B) of the distribution automation cabinet in the outdoor switching station provided by the present invention;

Figure 13 is a partially enlarged view (C-C) of the distribution automation cabinet in the outdoor switching station provided by the present invention;

Fig. 14 is a partial enlarged view (D-D) of the distribution automation cabinet in the outdoor switching station provided by the present invention;

Figure 15 is a partially enlarged view (E-E) of the distribution automation cabinet in the outdoor switching station provided by the present invention;

Fig. 16 is the wiring diagram of the remote signaling system in the outdoor switching station provided by the present invention;

Fig. 17 is the wiring diagram of the remote measurement signal system in the outdoor switching station provided by the present invention;

Fig. 18 is the wiring diagram of the remote control quantity signal system in the outdoor switching station provided by the present invention;

Fig. 19 is a wiring diagram of the "three remote" system in the outdoor switching station provided by the present invention;

Figures 20 to 25 are illustrations of the electrical interface definitions and wiring requirements of the secondary equipment of the "three remotes" when the terminal block connection mode is adopted in the outdoor switching station provided by the present invention;

Figures 26 to 32 are illustrations of the electrical interface definitions and wiring requirements of the secondary equipment of the "three remotes" when the aviation plug connection mode is adopted in the outdoor switching station provided by the present invention.

detailed description

The present invention will be described in further detail and completely below in conjunction with the embodiments and accompanying drawings.

The types of equipment or components that are not described in detail in the following examples can be commercially available in the prior art, and only need to meet the functions of the outdoor switch provided by the present invention, and it is not a limitation of the present invention choose.

Figure 3 and Figure 4 are the front view and top view of the outdoor switching station provided by the present invention. As shown in Figure 3, the outdoor switching station is divided into two functional areas, and a ring network formed by setting up several ring network cabinets side by side The cabinet group 1 (namely the primary equipment area or the incoming and outgoing line area A) and a power distribution automation cabinet 2 (ie the secondary equipment area or the control area B) are placed in a casing 3 together.

Among them, the distribution automation cabinet 2 is independently electrically connected to several ring network cabinets in the ring network cabinet group 1, and the distribution automation cabinet 2 is composed of the first distribution automation cabinet (microcomputer protection and control part distribution automation cabinet) 21 and the second distribution automation cabinet. The second distribution automation cabinet (DTU terminal and communication distribution automation cabinet) is composed of 22; wherein: the first distribution automation cabinet 21 is used to protect and control the ring network cabinet circuit in the ring network cabinet group 1, and realize the distribution of the ring network cabinet , closing operation, and when there is no second power distribution automation cabinet 22 (no DTU terminal and communication equipment or equipment failure), "alternate" monitoring, protection and control of the ring main unit, etc.; the second power distribution automation cabinet 22 Data acquisition and monitoring of each ring network cabinet is carried out through the DTU terminal and communication module, and the collected data is communicated with the outside. The circuits in the first and second power distribution automation cabinets (21, 22) can be plug-in connected or formed at one time according to the connection mode connected between the cabinets (line welding or one-time connection of required circuits in the production process) The form of the plug-in is prepared and placed in the corresponding position, and the plug-in connection can be completed when the cabinet is installed). In order to ensure that the power distribution automation cabinet 2 has an excellent working environment, the inventor has provided a set of temperature control devices, a heating device and a heat dissipation device in the power distribution automation cabinet 2, which is convenient for controlling the high temperature and low temperature in the power distribution automation cabinet 2, and is convenient. The components are protected and controlled in hot and cold areas, so that the entire power distribution automation cabinet has a good working environment and prolongs the service life of the power distribution automation cabinet. As a preferred embodiment, the heating device is a heater, and the heat dissipation device is a fan.

Fig. 4 is a top view of the outdoor switchgear. As shown in Fig. 4, as a preferred embodiment, the first power distribution automation cabinet 21 and the second power distribution automation cabinet 22 are separately arranged on the same side of the ring network cabinet group 1. The first power distribution automation cabinet 21 and the second power distribution automation cabinet 22 are relatively independent, and can be formed by splicing or one-time molding to achieve better and reasonable use of the equipment. space, saving floor space and reducing the height of the switchgear. The door opening direction of the first distribution automation cabinet 21 and the door opening direction of the second distribution automation cabinet 22 may be the same or different, depending on the settings between the first distribution automation cabinet 21 and the second distribution automation cabinet 22 . As a preferred solution, the door opening direction of the first distribution automation cabinet 21 is different from the door opening direction of the second distribution automation cabinet 22, as shown in Figure 4, the first distribution automation cabinet 21 and the outdoor switching station housing The ring network cabinet 1 of 3 is provided with an open door 31, and the second power distribution automation cabinet 22 is provided with an open door 32 and an opposite side open door 32' on the side of the housing 3 of the outdoor switching station, so as to facilitate construction or maintenance operations and repairs, etc.; In this way, the matching surfaces of the side walls in the first distribution automation cabinet 21 and the second distribution automation cabinet 22 can be bonded together, thereby further saving space and rational utilization. In addition, different door openings can facilitate accurate detection; FIG. 5 is The top view of another preferred embodiment of the outdoor switchgear, the housing 3 can be provided with multiple doors to distinguish multiple functional areas, which is also convenient for installation, assembly and maintenance, as shown in Figure 5: the housing 3 is respectively Set up the second power distribution automation cabinet door 33, the first power distribution automation cabinet door 34, the ring network cabinet group cabinet door 35, and the ring network cabinet group outlet area cabinet doors 36 and 36'. The separation of the incoming and outgoing line areas of the ring network cabinet is conducive to safety management, especially during live installation and construction. Lock the incoming line side to avoid misoperation and ensure safe operation in the outgoing line area.

In addition, as shown in Figure 4 and Figure 5, along the X direction, the ring main unit group 10 includes a PT power supply cabinet 11, incoming line ring main unit (AH01-02, two incoming line ring main unit) 12 and outgoing line ring Network cabinet 13 (AH03-06, four outlet ring network cabinets), PT power supply cabinet 11, each incoming line ring main unit 12 and each outgoing line ring main unit 13 are each a ring main unit circuit. PT power cabinet 11 can adopt the structure in the prior art, as by voltage transformer, relay and accumulator part; In the cabinet, it provides battery charging power or operating power for the incoming and outgoing electric mechanism.

It is worth mentioning that the biggest improvement point of the outdoor switching station provided by the present invention, which is different from the prior art, is that it is the first to improve the function modules of the switching station in the prior art, especially the distribution automation cabinet. The electrical connection method is to change each functional module of the power distribution automation cabinet into a drawer-type movable connection. A single drawer-type cabinet and a single functional module are combined into a drawer unit module, and the corresponding drawer unit module includes the functions required in the corresponding function module. Components, all functional components are uniformly installed in the drawer cabinet, and the entire drawer unit module is used as a standard part. In addition, the primary equipment and secondary equipment in the outdoor switching station are also separated, and the protection and control unit modules used to protect and control the ring network cabinet in the prior art are integrated into one as the power distribution automation cabinet in the present invention. The "first distribution automation cabinet" is further moved from the top of the ring network cabinet to one side of the ring network cabinet and combined with the second distribution automation cabinet responsible for communication and other functions to form a multi-functional distribution automation cabinet The cabinet not only makes better and reasonable use of the space in the opening and closing station, but is also easier to operate and manage.

Fig. 6 is a front view of the first power distribution automation cabinet. The first power distribution automation cabinet 21 includes a first wiring terminal drawer unit module 211 and several single-loop control and protection drawer unit modules 212 (which may be microcomputer protection or control modules), wherein the number of single-loop control and protection drawer unit modules 212 is the same as The number of circuits or units of the ring network cabinet is the same, and the arrangement order of the single-circuit control and protection drawer unit modules 212 is not unique and absolute, but is determined according to the circuit sequence of the ring network cabinet. The arrangement order of the single-circuit control and protection drawer unit modules 212 is the same as that of the ring network cabinet The loop sequence is the same. As shown in Figure 6, there are 7 sets of ring network cabinet circuits in this embodiment, so the first power distribution automation cabinet 21 is provided with 7 single-circuit control and protection drawer unit modules 212 arranged and connected sequentially from top to bottom; PT cabinet control and protection drawer unit module 2127, first incoming line cabinet control and protection drawer unit module 2121, second incoming line cabinet control and protection drawer unit module 2122, first outgoing line cabinet control and protection drawer unit module 2123, second outgoing line cabinet control and protection The drawer unit module 2124, the third outlet cabinet control and protection drawer unit module 2125 and the fourth outlet cabinet control and protection drawer unit module 2126, the arrangement sequence of the 7 single-circuit control and protection drawer unit modules 212 is the same as the ring network in ring network cabinet group 1 The cabinet circuits are in the same order.

Fig. 7 is the front view of the second power distribution automation cabinet, as shown in Fig. 7: the second power distribution automation cabinet 22 includes the second wiring terminal drawer unit module 221, DTU protection integrated drawer unit module 222, ONU communication Integrated drawer unit module 223 and power supply drawer unit module 224; Wherein: the second wiring terminal drawer unit module 221 is electrically connected with the first power distribution automation cabinet 21 respectively, to obtain the data of the first power distribution automation cabinet 21 (and once equipment operation data); DTU protection integrated drawer unit module 222 is connected with the second wiring terminal drawer unit module 221, and feeder automation and relay protection are carried out to the first power distribution automation cabinet 21; ONU communication integrated module 223 and DTU protection integrated drawer The unit modules 222 are connected to collect data and communicate with the outside; the power supply drawer unit module 224 is used to provide the second wiring terminal drawer unit module 221, the DTU protection integrated drawer unit module 222, the ONU communication integrated drawer unit module 223 and all secondary components. The power drawer unit module 224 may be a comprehensive module (not shown in the figure) including a charging module and a battery module.

Fig. 8 is an assembly side view of a preferred embodiment of the drawer-type structure of the distribution automation cabinet 2. As shown in Fig. 8, the distribution automation cabinet 2 can be formed by a cabinet body 23 and a corresponding drawer-type cabinet 24 The drawer unit realizes the improvement of the pull-out structure of a single functional module, and the electrical connection between the cabinet body 23 and the drawer cabinet 24 can adopt a plug-in electrical connection. Fig. 9 is a further assembled top view of the drawer structure of the distribution automation cabinet 2, as shown in Fig. 9, the first distribution automation cabinet 21 and the second distribution automation cabinet 22 of the distribution automation cabinet 2 can respectively distribute power The side and/or front of the cabinet body 23 of the automation cabinet 2 are inserted into the cabinet body 23 to realize electrical connection and corresponding functions. Fig. 10 is a partial enlarged view (A-A) of 212 of the single-loop control and protection drawer unit module 21 in the first power distribution automation cabinet. As shown in Fig. 10, the single-loop control and protection drawer unit module 212 is provided with a secondary element, The secondary elements are meter and control element 21201, protection device (fault indication) installation 21202, indicator light, switch button 21203, lock 21204 and handle 21205.

Fig. 11 is a partial enlarged view (A'-A') of the drawer-type cabinet 24 in the distribution automation cabinet 2. Each functional module in the distribution automation cabinet 2 can be integrated through the drawer-type cabinet 24. The distribution automation cabinet In the production process of 2, each functional module can be installed in the corresponding drawer cabinet 24 according to the functional requirements of the outdoor switchgear to make a single-circuit control protection drawer unit module 212 or a DTU protection comprehensive drawer unit module 222, etc. Fig. 12 is a partial enlarged top view (B-B) of the single-circuit control and protection drawer unit module 212 in the first power distribution automation cabinet 21. As shown in Fig. 12, one side of each single-circuit control and protection drawer unit module 212 is provided with At least one secondary plug-in 21206, one end of the secondary plug-in 21206 can be plugged and electrically connected to the plug-in that matches the shape of the cabinet 23, and the other end of the secondary plug-in 21206 is connected to the first wiring of the first distribution automation cabinet 21 The terminal drawer unit module 211 is connected. It is worth mentioning that the connection mode between the other end of the secondary plug-in 21206 and the first terminal drawer unit module 211 can be a terminal block and/or an aviation plug (this can be flexibly adjusted according to the manufacturer or during use, and the above-mentioned connection can be selected. method will not produce a material difference). In addition, other secondary functional elements of the single-loop control protection drawer unit module 212 can be reasonably distributed according to the spatial position of the single-circuit protection drawer unit module 212, depending on the secondary functional elements to be loaded. Those skilled in the art The spatial position can be adjusted with reference to the main purpose of the present invention to achieve a reasonable allocation. If the adjustment of the spatial structure in the module does not produce other new technical effects, the improvement only for the purpose of saving space will be regarded as an improvement from the present invention. The teachings obtained are still within the protection scope of the present invention. Fig. 13 is a partially enlarged top view (C-C) of each drawer unit module in the second power distribution automation cabinet 22. As shown in Fig. 13, the functional module takes the DTU protection integrated drawer unit module 222 as an example, and the DTU protection integrated drawer unit One side of the module 222 is provided with at least one secondary plug-in 2221, one end of the secondary plug-in 2221 is connected to each functional element in the drawer unit module, and the other end of the secondary plug-in 2221 is connected to the second terminal drawer unit of the second power distribution automation cabinet 22 Module 221. It is worth mentioning that the other end of the secondary plug-in 2221 can be connected to the second terminal drawer unit module 221 by a terminal block and/or an aviation plug. Figure 13 is a partial enlarged view (D-D) of multiple pairs of secondary inserts 2221, and Figure 14 is a partial enlarged view (E-E) of a pair of secondary inserts; as shown in Figures 13 and 14, the secondary inserts (2221, 21206) match in shape , in order to achieve stable connection and easy disassembly, the shape of the secondary plug-in (21206, 2221) can adopt a variety of plug-in electrical connection plug-ins in the prior art, which will not be repeated here.

When the monitoring information includes fault monitoring information, a dedicated fault judgment module can be built in the unit monitoring terminal, which is used to judge the short circuit and/or grounding fault of the outgoing line according to the judgment basis, generate fault monitoring information, and monitor the fault The information is reported to the control terminal.

It is worth noting that the connection mode between the first terminal drawer unit module 211 and the second power distribution automation cabinet 22 or with the ring main unit side, the second terminal drawer unit module 221 and the first power distribution automation cabinet 21 or with the The connection method on the ring main unit side is applicable to any connection method of terminal block and/or aviation plug. In order to realize that the technical requirements of each secondary equipment in the switching station meet the national grid standards, that is, 1) collect AC voltage and current, and it is required to collect no less than 4 voltage quantities (voltage input nominal value 100V/220, 50Hz) ; It is required to collect no less than 12 current quantities (the current input nominal value is 5V/1A); the voltage sampling accuracy is 0.5; the active and reactive power sampling accuracy is 1.0; at the nominal input value, the power consumption of each loop should be Less than 0.5VA; apply 2000% of the nominal value of the short-term excessive AC input current (current input nominal value 5V/1A), and the duration is less than 1 second, and the power distribution terminal should work normally; 2) Collect no less than 2 DC currents ;3) Collect no less than 20 remote signals, the remote signal resolution is not greater than 5 milliseconds, and the remote signal power supply voltage is not lower than 24V; 4) Take protective measures to filter false remote signals; 5) Realize no less than 4 channels The opening and closing control of the switch has software and hardware anti-misoperation measures to ensure the reliability of the control operation; 6) It should have no less than 4 serial ports and 2 Ethernet communication interfaces; 7) The normal operation function of the whole machine Not more than 20VA, and the normal operating power consumption of the communication power supply and operating power supply during no-load operation should not be more than 25VA; 8) The error of punctual accuracy should not be greater than 2 seconds per 24 hours. As shown in Figures 20 to 32, the definitions and requirements of the electrical interfaces of the secondary equipment in the "three remotes" of the outdoor switching station provided by the present invention. in:

As shown in Figures 20 to 25, the electrical interface definitions and wiring requirements of the secondary equipment of the "three remotes" when the terminal block connection mode is used in the outdoor switchgear provided by the present invention, see Figures 20 to 25 for details.

As shown in Figures 26 to 32, the electrical interface definitions and wiring requirements of the secondary equipment of the "three remotes" when the aviation plug connection mode is used in the outdoor switchgear provided by the present invention, see Figures 26 to 32 for details.

It should be pointed out that, on the premise of conforming to the structural improvement of the outdoor switchgear of the present invention, the wiring or circuit diagram in the switchgear can adopt the general means in the prior art, and it is not the key to whether the present invention can realize its function Where; Fig. 16-19 is an optional wiring schematic diagram when the outdoor switching station provided by the present invention realizes "three remotes". The monitoring information obtained by monitoring the unit monitoring terminal includes but is not limited to the following one or Its combination: remote signal quantity information, remote measurement information, remote control quantity information, remote adjustment quantity information and fault monitoring information. The remote signal information mainly refers to the information required for the current state of the remote test switch, such as the status signal of the ring main unit, the switch closing signal, the switch opening signal, the isolating switch closing signal, the isolating switch opening signal, and the grounding knife closing signal. Gate signal, switch not stored energy signal, switch stored energy signal remote/local signal, protection action signal, abnormal air pressure signal, hand/electric signal, cable room closing signal, node temperature status and other information, Figure 16 provides information for the present invention The wiring diagram of the remote signal system in the outdoor switching station. Telemetry information mainly refers to the single voltage, working voltage, measured zero current (I _a , I _c ), measured zero current I ₀ , protection current (I _a , I _c ) and other values on the remote telemetry line, as shown in Figure 17 The wiring diagram of the remote measurement signal system in the outdoor switching station provided by the invention. Remote control information mainly refers to the remote control of some remote equipment, such as switching electric operation power supply, switching remote "closing" control, switching remote "opening" control, heating start, fan start, alarm status reset and communication reset, etc. , Figure 18 is a wiring diagram of the remote control signal system in the outdoor switching station provided by the present invention. Generally speaking, "three remotes" refer to remote signaling, telemetry, and remote control. Fig. 19 is a wiring diagram of the "three remotes" system in the outdoor switching station provided by the present invention. The remote adjustment amount information mainly refers to the information required for remote debugging of remote devices. The fault monitoring information mainly includes the information of the short-circuit fault and/or the information of the ground fault in the outgoing line.

In order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and functions. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order.

The above are only preferred implementation modes of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content explained above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (21)

1. The outdoor switching station is characterized in that it includes: a ring network cabinet group, a power distribution automation cabinet and a housing, the ring network cabinet group and the power distribution automation cabinet are arranged in the housing, and the power distribution automation cabinet is located in the ring network cabinet group On the same side, it includes the first power distribution automation cabinet and the second power distribution automation cabinet. There are multiple functional modules on the power distribution automation cabinet. Each functional module is assembled in a drawer type in the power distribution automation cabinet to form a drawer unit module, wherein: The distribution automation cabinets are independently electrically connected to several ring network cabinets in the ring network cabinet group; The RMU group includes PT power cabinets, incoming RMUs, and outgoing RMUs. The PT power cabinets and each RMU constitute a ring main circuit. In the automation cabinet; The first power distribution automation cabinet includes a first terminal drawer unit module and several single-loop control and protection drawer unit modules, and the single-loop control and protection drawer unit modules are provided with secondary components. 2. The outdoor switching station according to claim 1, wherein the power distribution automation cabinet comprises a cabinet body and a plurality of drawer cabinets, the cabinet body and the drawer cabinets are movably connected, and the drawer cabinets are located in the cabinet body. 3. The outdoor switchgear according to claim 2, characterized in that: the cabinet body and the drawer-type cabinet are electrically connected by a plug-in type. 4. The outdoor switchgear according to claim 2, characterized in that: the corresponding drawer unit module includes each functional element required in the corresponding functional module, and each functional element is uniformly installed in the drawer cabinet. 5. The outdoor switching station according to claim 1, characterized in that: the first power distribution automation cabinet and the second power distribution automation cabinet can be separated from the side or front of the power distribution automation cabinet respectively. part into the cabinet. 6. The outdoor switchgear according to claim 1, characterized in that: the first distribution automation cabinet and the second distribution automation cabinet are arranged as front and rear cabinets. 7. The outdoor switchgear according to claim 6, characterized in that: the cabinets of the first distribution automation cabinet and the second distribution automation cabinet are relatively independent, and are formed by splicing or one-shot molding. 8. The outdoor switching station according to claim 1, characterized in that: the number of single-circuit control protection drawer unit modules is consistent with the number of circuits or units of the ring network cabinet. 9. The outdoor switching station according to claim 1, characterized in that: the sequence of the single-circuit control and protection drawer unit modules is consistent with the circuit sequence of the ring network cabinet. 10. The outdoor switching station according to claim 1, characterized in that: the first power distribution automation cabinet is provided with 7 single-circuit control and protection drawer unit modules, which are respectively PT cabinet control and protection drawer unit modules, the first incoming line Cabinet control and protection drawer unit module, second incoming line cabinet control and protection drawer unit module, first outgoing line cabinet control and protection drawer unit module, second outgoing line cabinet control and protection drawer unit module, third outgoing line cabinet control and protection drawer unit module and fourth The control and protection drawer unit modules of the outlet cabinet, and the arrangement sequence of the 7 single-circuit control and protection drawer unit modules are consistent with the circuit sequence of the ring network cabinet. 11. The outdoor switchgear according to claim 1, characterized in that: the single-circuit control protects the secondary elements provided on the drawer unit module, including but not limited to meters and control elements, protection devices, indicator lights, Switch buttons, locks and handles. 12. The outdoor switchgear according to claim 1, characterized in that: one side of the single-circuit control protection drawer unit module is provided with at least one secondary plug-in, and one end of the secondary plug-in is formed into a plug-in that matches the shape of the cabinet body. A pluggable movable electrical connection, the other end of the secondary plug-in is connected to the first terminal drawer unit module in the first power distribution automation cabinet. 13. The outdoor switchgear according to claim 12, wherein the secondary inserts are arranged in rows. 14. The outdoor switching station according to claim 1, characterized in that: the connection mode between the first terminal drawer unit module and the second power distribution automation cabinet or the side of the ring network cabinet is suitable for any terminal block or aviation plug A way to connect. 15. The outdoor switching station according to claim 1, characterized in that: the second power distribution automation cabinet includes a second terminal drawer unit module, a DTU protection integrated drawer unit module, an ONU communication integrated drawer unit module and Power supply drawer unit module; wherein, the second wiring terminal drawer unit module is electrically connected to the first power distribution automation cabinet respectively, the DTU protection integrated drawer unit module is connected to the second wiring terminal drawer unit module, and the ONU communication integrated drawer unit module is connected to the DTU The protection integrated drawer unit module is connected, and the power supply drawer unit module provides the power required by the second terminal drawer unit module, DTU protection integrated drawer unit module, ONU communication integrated drawer unit module and all secondary components. 16. The outdoor switching station according to claim 15, characterized in that: each drawer unit module in the second power distribution automation cabinet is provided with at least one secondary plug-in, and one end of the secondary plug-in is connected to each function in the drawer unit module The other end of the secondary plug-in is connected to the second terminal drawer unit module of the second power distribution automation cabinet. 17. The outdoor switching station according to claim 15, characterized in that: the connection mode between the second terminal drawer unit module and the first power distribution automation cabinet or the side of the ring network cabinet is suitable for any terminal block or aviation plug A sort of. 18. The outdoor switchgear according to claim 1, wherein the opening direction of the first distribution automation cabinet is the same as or different from that of the second distribution automation cabinet. 19. The outdoor switching station according to claim 1, characterized in that: the first power distribution automation cabinet and the ring main unit are provided with a door on the shell, and the second power distribution automation cabinet is provided with a door on the side of the shell And the opposite side door. 20. The outdoor switchgear according to claim 19, characterized in that: the housing is respectively provided with the second power distribution automation cabinet door, the first power distribution automation cabinet door, the ring network cabinet group cabinet door, and the ring network cabinet group outgoing line area cabinet door. 21. The outdoor switching station according to claim 1, characterized in that: a set of temperature control device, a heating device and a heat dissipation device are installed in the power distribution automation cabinet.