A 35kV mobile substation and method of use thereof

Abstract

The present application belongs to the field of petrochemical industry, and particularly relates to a 35kV mobile transformer substation and a use method thereof, wherein the 35kV mobile transformer substation comprises: a first box transformer; an automation box connected with the first box transformer; and a second box transformer, wherein the first box transformer, the automation box and the second box transformer each have a modular base capable of being arbitrarily spliced relative to each other. Through the technical scheme of the present application, the construction period can be effectively shortened, the box transformer can be quickly assembled according to the actual situation, and the occupied area is reduced. Moreover, the present application has strong applicability, complete functions, and can be repeatedly used, and is suitable for installation and reconstruction of all transformer substations in oil fields, and can be used for new station installation and transformer substation reconstruction. Meanwhile, the present application can be used as a whole or can be split for use, and is respectively used for 6(10)kV and 35kV partial reconstruction of transformer substations, and has strong versatility.

Description

Technical Field

[0001] This invention belongs to the field of petrochemicals, and in particular relates to a 35kV mobile substation and its usage method. Background Technology

[0002] Currently, substation renovation and emergency repair require temporary transitional measures, but the installation of new substations is time-consuming and costly. There are no suitable products for overall substation renovation, or for separate renovations of 6(10)kV and 35kV sections, where each part can be quickly installed to form a 35kV mobile substation. In short, existing technologies have at least the following problems:

[0003] 1) The transition measures are complicated, require a large area, and have a long construction period.

[0004] 2) Requires external substation transformers, disconnectors and other primary equipment.

[0005] 3) It requires the interconnection of primary and secondary equipment, which makes construction complex, has a long construction period, and requires a large investment.

[0006] 4) There is no mobile substation whose components can be quickly assembled into a substation and can also be quickly disassembled to modify the various parts of the substation.

[0007] Therefore, there is room for improvement in existing technologies. Summary of the Invention

[0008] This application summarizes various aspects of the embodiments and should not be construed as limiting the claims. Other implementations are contemplated based on the technology described herein, as will be apparent to those skilled in the art upon studying the following drawings and detailed descriptions, and these implementations are intended to be included within the scope of this application.

[0009] To address the problems existing in the prior art, according to one aspect of the present invention, a 35kV mobile substation is provided, comprising: a first transformer substation; an automation box connected to the first transformer substation; and a second transformer substation, wherein the first transformer substation, the automation box, and the second transformer substation each have a modular base, and the modular bases can be arbitrarily spliced ​​relative to each other.

[0010] In an embodiment of the present invention, the first transformer is a 35kV transformer, and the second transformer is a 6kV or 10kV transformer.

[0011] In an embodiment of the present invention, the first transformer substation and / or the second transformer substation adopt a single busbar segmented wiring method.

[0012] In an embodiment of the present invention, each section of the first transformer substation and / or the second transformer substation is provided with at least one power distribution box for quick connection.

[0013] In an embodiment of the present invention, the second transformer box includes a station service transformer and an AC / DC power supply box disposed therein.

[0014] In an embodiment of the present invention, the station service transformer includes a 100kVA station service transformer.

[0015] In an embodiment of the present invention, when the 35kV mobile substation is used for 10kV system upgrade, the primary coil of the station service transformer of the second box-type substation is connected in a star configuration; when the 35kV mobile substation is used for 6kV system upgrade, the primary coil of the station service transformer of the second box-type substation is connected in a delta configuration.

[0016] In an embodiment of the present invention, the second transformer has a voltage transformer corresponding to 6kV and a voltage transformer corresponding to 10kV.

[0017] In an embodiment of the present invention, the automation box includes an AC / DC power supply, a 35kV power supply section, main transformer protection, and signal and operating power supply disposed therein.

[0018] In an embodiment of the present invention, the first transformer substation and the second transformer substation can be directly connected via a secondary cable with a plug.

[0019] In an embodiment of the present invention, the 35kV mobile substation further includes a main transformer, and the first and second transformers are respectively connected to the main transformer via high-voltage cables with plugs.

[0020] In an embodiment of the present invention, the first transformer adopts a single busbar segmentation, each busbar segment is equipped with one incoming line, two outgoing lines, and one main transformer switch, and the outgoing line protection device is installed on the switch cabinet.

[0021] According to another aspect of the present invention, a method of using a 35kV mobile substation is provided, comprising the following steps: providing a first transformer substation, an automation box connected to the first transformer substation, and a second transformer substation, wherein the first transformer substation, the automation box, and the second transformer substation each have a modular base, and the modular bases can be arbitrarily spliced ​​relative to each other.

[0022] In an embodiment of the present invention, the first transformer is a 35kV transformer, and the second transformer is a 6kV or 10kV transformer.

[0023] In an embodiment of the present invention, the method of use includes the following steps: when used for the overall renovation of a 35kV substation, the first transformer box, the second transformer box, and the automation box are assembled into a 35kV substation through their respective modular bases.

[0024] In embodiments of the present invention, the method includes the following steps:

[0025] When used for the 6kV section upgrade of a substation, only the second transformer box is put into use, while the primary coil of the station service transformer is changed to a delta connection, and the PT is replaced with a 6kV PT; and

[0026] When used for the 10kV part of the substation renovation, only the second box transformer is put into use, and the primary coil of the station service transformer is changed to star connection, and the PT is replaced with a 10kV PT.

[0027] In an embodiment of the present invention, the method of use includes the following steps: when used for the 35kV part of the 35kV substation renovation, only the first transformer box is put into use, and the relay protection uses the original control room protection. When cooperating with the relay protection renovation, the automation box is connected to the first transformer box.

[0028] In embodiments of the present invention, the method includes the following steps:

[0029] When used for the 35kV part of the 110kV substation renovation, only the first transformer box is put into use, and the relay protection uses the original control room protection device.

[0030] When there are many outgoing lines, one of the two busbars is switched off and modified first, and then the other is switched off. At this time, one main transformer switch is used as an outgoing line.

[0031] Compared with the prior art, the present invention has at least the following advantages: 1) The various parts of the 35kV mobile substation described in the present invention can be quickly assembled, are easy to install, have a short construction period, occupy a small area, require less investment, and can be reused, meeting the needs of emergency rescue and temporary transition. 2) The 35kV mobile substation described in the present invention can be used for new station installation, which can shorten the construction period and reduce equipment investment. 3) The transformer base adopts a modular design. The 6(10)kV transformer, the 35kV transformer, and the automation box each have their own base. The three bases can be spliced ​​together arbitrarily according to the site conditions, which is quick to install and avoids the problems of long construction period and high cost caused by foundation construction, while reducing the area occupied. 4) The 6(10)kV transformer and the 35kV transformer are directly connected by a special secondary cable with a plug, which saves time and effort. 5) The 6(10)kV transformer, the 35kV transformer and the main transformer can be directly connected by a specially made cable. 6) A 6(10)kV box-type transformer and a 35kV box-type transformer can be combined to form a mobile 35kV substation. They can be used separately for the renovation of 6(10)kV or 35kV substation systems. 7) The secondary winding of the current transformer in the box-type transformer has taps to meet the renovation needs of different substations. 8) The box-type transformer is equipped with station service transformer, AC / DC system, switch, fire protection, application lighting, remote communication, and video monitoring, without the need for external equipment. 9) It has remote control, remote measurement, remote adjustment, and remote signaling functions to meet the needs of unattended operation. 10) This invention can realize multi-scenario applications.

[0032] Upon studying the following description, claims and drawings, those skilled in the art will understand and recognize these and other aspects, objects and features of this disclosure. Attached Figure Description

[0033] To gain a more complete understanding of the embodiments of this application, reference should be made to the embodiments described in more detail in the accompanying drawings and by way of example below, wherein:

[0034] Figure 1 A schematic diagram of a 35kV mobile substation provided in an embodiment of the present invention;

[0035] Figure 2 This is a connection diagram of the primary coil of a station service transformer provided in an embodiment of the present invention;

[0036] Figure 3 A prefabricated primary cable diagram provided for an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of a modular base provided in an embodiment of the present invention;

[0038] Figures 5a-5c A connection assembly diagram of the modular base provided in an embodiment of the present invention;

[0039] Figure 6 This is a diagram showing the separate use of the 6(10) and 35kV box-type substations provided in the embodiments of the present invention;

[0040] Figure 7 This is a schematic diagram of the 35kV section modification of a 35kV substation provided in an embodiment of the present invention;

[0041] Figure 8 A schematic diagram of the 35kV section modification of a 110kV substation (each section has 3 or fewer outgoing lines) provided for an embodiment of the present invention;

[0042] Figure 9 A schematic diagram of the 35kV section modification of a 110kV substation provided in an embodiment of the present invention (each section has more than 3 outgoing lines);

[0043] Figure 10 This is a schematic diagram of the connection of the secondary connection cable provided in an embodiment of the present invention;

[0044] Figure 11 This is a schematic diagram of power distribution box switching provided in an embodiment of the present invention;

[0045] Figure 12 A schematic diagram showing that the main transformer high-voltage backup and outgoing line protection devices provided in the embodiments of the present invention use the same model of outgoing line protection device;

[0046] Figure 13 This is a flowchart illustrating the usage method of the 35kV mobile substation provided in an embodiment of the present invention. Detailed Implementation

[0047] The following describes embodiments of the present disclosure. However, it should be understood that the disclosed embodiments are merely examples, and other embodiments may take various alternative forms. The drawings are not necessarily drawn to scale; certain functions may be exaggerated or minimized to show details of particular components. Therefore, the specific structural and functional details disclosed herein should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art to use the application in various ways. As those skilled in the art will understand, various features shown and described with reference to any of the drawings may be combined with features shown in one or more other drawings to produce embodiments not explicitly shown or described. The combinations of features shown provide representative embodiments for typical applications. However, various combinations and modifications of features consistent with the teachings of this disclosure may be desirable for certain particular applications or implementations.

[0048] Furthermore, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or action from another, and do not necessarily require or imply any actual such relationship or order between these entities or actions. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements may include not only those elements but also elements not expressly listed or inherent to such processes, methods, articles, or apparatuses.

[0049] The following describes one or more embodiments of this application with reference to the accompanying drawings. The flowcharts illustrate the processes performed by the system according to this application. It is understood that the execution of the flowcharts does not need to be sequential; one or more steps may be omitted, one or more steps may be added, and steps may be performed in a sequential or reverse order. In some embodiments, one or more steps may even be performed simultaneously.

[0050] This invention provides a 35kV mobile substation and its usage method. Depending on installation and renovation requirements, the 35kV mobile substation can be used for new substation installations and temporary transitions during overall renovations of 35kV substations. It can also be used in sections for temporary transitions during renovations of 6(10)kV and 35kV sections of substations, demonstrating strong versatility and a wide range of applications.

[0051] According to one aspect of the invention, reference Figures 1-12 A 35kV mobile substation is provided, comprising: a first transformer substation 3; an automation box 6 connected to the first transformer substation 3; and a second transformer substation 1, wherein the first transformer substation 3, the automation box 6, and the second transformer substation 1 each have a modular base, which can be arbitrarily assembled relative to each other. In an embodiment of the invention, the first transformer substation 3 can be a 35kV transformer substation, and the second transformer substation 1 can be a 6kV or 10kV transformer substation, i.e., a 6(10)kV transformer substation. The modular bases 9 of the first transformer substation 3, the automation box 6, and the second transformer substation 1 can be arbitrarily assembled according to site conditions, allowing for rapid installation and avoiding the problems of long construction cycles and high costs caused by foundation construction, while also reducing the floor space required. Reference Figure 4 The diagram shows a schematic of the modular base 9. The modular base 9 of the first transformer substation 3, the automation box 6, and the second transformer substation 1 can be the same or different, for example, they can have different dimensions depending on their respective sizes. Figures 5a-5c The diagram shows three modular bases that can be assembled together according to actual installation needs. Figure 5a The modular bases of the first transformer substation 3, the automation substation 6, and the second transformer substation 1 are placed side by side along their length. Figure 5bThe modular bases of the first transformer substation 3 and the second transformer substation 1 are placed side by side along their length, and the modular base of the automation box 6 is connected to the first transformer substation 3 and the second transformer substation 1 along their width; and Figure 5c The modular bases of the first transformer substation 3, the automation substation 6, and the second transformer substation 1 are placed side by side along their width. It should be understood that... Figures 5a-5c The example provided illustrates the splicing orientation of the three modular bases only by way of example. However, other splicing methods may be included as needed, and all of them are included within the scope of this invention.

[0052] In the embodiments of the present invention, the first transformer substation 3 and / or the second transformer substation 1 adopt a single busbar segmented connection method, with a large number of outgoing line bays, which can meet the needs of oilfield power grid transformation.

[0053] In an embodiment of the invention, each section of the first transformer substation 3 and / or the second transformer substation 1 is equipped with at least one power distribution box for quick connection. In one embodiment, each section of the 6(10)kV and 35kV transformer substations is equipped with two power distribution boxes. The high-voltage cables of the transformer substations are prefabricated and can be reused. They are connected through the distribution boxes, which are placed in appropriate positions according to the cable length. This serves two purposes: firstly, to prevent the original cable from being too short, and secondly, to achieve quick connection, greatly shortening the switching time and saving money. Figure 11 In the illustrated embodiment, the transformer substation can correspond to four power distribution boxes, and when modifications are needed, the high-voltage room can be connected to each power distribution box.

[0054] In an embodiment of the present invention, the second transformer substation 1 includes a station service transformer 8 and an AC / DC switch (not shown in the figure) disposed therein, and adopts a miniaturized design with a large number of outgoing line bays. The station service transformer 8 includes a 100kVA station service transformer. In one embodiment, the 6(10)kV transformer substation is equipped with two 100kVA station service transformers to meet the substation renovation requirements, and at the same time, by changing the primary coil connection method of the station service transformer 8, it can meet the renovation requirements of both 6kV and 10kV systems. Figure 2 As shown, when the 35kV mobile substation is used for 10kV system upgrade, the primary coil of the station service transformer 8 of the second transformer substation 1 is connected in a star configuration; when the 35kV mobile substation is used for 6kV system upgrade, the primary coil of the station service transformer 8 of the second transformer substation 1 is connected in a delta configuration.

[0055] In an embodiment of the present invention, the second transformer substation 1 has a voltage transformer corresponding to 6kV and a voltage transformer corresponding to 10kV. When used for different systems, the corresponding PT is adopted, so that the transformer substation is suitable for both 6kV and 10kV systems.

[0056] In an embodiment of the present invention, the automation box 6 includes an AC / DC power supply, a 35kV power supply section, main transformer protection, and signal and operating power supply. In one embodiment, the AC power supply is a 6(10)kV transformer or the original 6(10)kV high-voltage substation power supply, and the 35kV automation box is equipped with main transformer protection, measurement and control devices, and remote control devices.

[0057] In embodiments of the present invention, the first transformer substation 2 and the second transformer substation 1 can be directly connected via a secondary cable 10 with a plug, such as... Figure 10 As shown, this plug-in direct connection method saves time and effort.

[0058] In an embodiment of the present invention, the 35kV mobile substation further includes a main transformer 2, a first transformer substation 3 and a second transformer substation 1 respectively connected by a high-voltage cable 7 with a plug. Figure 3 (As shown in the diagram) It is connected to the main transformer 2. In one embodiment, the primary cables from the two transformer substations (35kV and 6kV) to the main transformer can be directly connected using prefabricated dedicated cables, achieving rapid connection. In addition, the 35kV mobile substation may also include a power supply 4, such as a 35kV incoming line, to supply power to the first transformer substation 3.

[0059] In an embodiment of the present invention, the first transformer substation 3 adopts a single busbar segmentation, with each busbar segment equipped with one incoming line, two outgoing lines, and one main transformer switch. The outgoing line protection device is installed on the switchgear. When used for main transformer upgrades, only overcurrent protection is activated for high-level transformer backup. In one embodiment, when the 35kV transformer substation is used for 35kV outgoing line upgrades of a 110kV substation, each bay has a corresponding outgoing line protection device, such as... Figure 12 As shown.

[0060] The 35kV mobile substation described in this invention is applicable to various application scenarios and has strong versatility. Some application scenarios are illustrated below:

[0061] Figure 6 The diagram shows the separate use of the 6(10)kV and 35kV transformer substations. When the 6(10)kV and 35kV transformer substations are used separately, each segment of the 6(10)kV or 35kV transformer substation can correspond to at least one power distribution box. The transformer substation and the power distribution box can be connected via primary cables, and the power distribution box is further connected to the load. In addition, the 6(10)kV or 35kV transformer substation is connected to the main transformer protection device via the main transformer's secondary cables. Compared with the prior art, the 35kV mobile substation can be used separately for temporary transitions in the renovation of the 35kV switchgear and 6(10)kV switchgear of the substation.

[0062] Figure 7The diagram illustrates the 35kV section of a 35kV substation upgrade. Each section of the 35kV prefabricated transformer can connect to at least one power distribution box, and each power distribution box is further connected to the 35kV main transformer and 35kV incoming and outgoing lines. Additionally, the 35kV prefabricated transformer is connected to an automation box. Compared to existing technologies, this upgrade allows for rapid connection during the transition, shortening the upgrade time and construction cycle.

[0063] Figure 8 A schematic diagram of the 35kV section upgrade of a 110kV substation is shown. Figure 7 The difference in the previous embodiment is that the 35kV box-type transformer is connected to the main transformer protection device, rather than an automation box. When used for the 35kV section upgrade of a 110kV substation, it needs to be used in conjunction with the 110kV main transformer protection. The automation box is used during the overall upgrade of the 35kV substation.

[0064] Figure 9 The diagram shows a schematic of the 35kV section modification of a 110kV substation. When there are many 35kV outgoing lines in a 110kV substation, the 35kV switch of one busbar is modified first, and then the 35kV switch of another busbar is modified. This solves the problem of insufficient 35kV outgoing line switches in the 35kV box-type substation. The method is to use one main transformer switch as a main transformer switch, and another main transformer switch as a 35kV outgoing line. The 35kV bus tie switch is put into operation, and the 35kV box-type substation is used as a section of busbar.

[0065] According to another aspect of the present invention, a method for using a 35kV mobile substation is provided, such as... Figure 13 As shown, it includes the following step a: providing a first transformer substation, an automation box connected to the first transformer substation, and a second transformer substation, wherein the first transformer substation, the automation box, and the second transformer substation each have a modular base, and the modular bases can be arbitrarily spliced ​​relative to each other. In an embodiment of the present invention, the first transformer substation is a 35kV transformer substation, and the second transformer substation is a 6kV or 10kV transformer substation.

[0066] In an embodiment of the present invention, the method further includes the following step b: when used for the overall renovation of a 35kV substation, the first transformer box, the second transformer box, and the automation box are assembled into a 35kV substation using their respective modular bases.

[0067] In an embodiment of the present invention, the method of use further includes the following step c: when used for the 6kV part of the substation renovation, only the second box transformer is put into use, and the primary coil of the station service transformer is changed to a delta connection, and the PT is replaced with a 6kV PT; and when used for the 10kV part of the substation renovation, only the second box transformer is put into use, and the primary coil of the station service transformer is changed to a star connection, and the PT is replaced with a 10kV PT.

[0068] In an embodiment of the present invention, the method of use further includes the following step d: when used for the 35kV part of the 35kV substation renovation, only the first transformer box is put into use, and the relay protection uses the original control room protection. When cooperating with the relay protection renovation, the automation box is connected to the first transformer box.

[0069] In an embodiment of the present invention, the method of use further includes the following step e: when used for the 35kV part of the 110kV substation renovation, only the first transformer box is put into use, and the relay protection uses the original control room protection device; when there are a large number of outgoing lines, one of the two busbars is cut off and modified first, and then the other section is cut off. At this time, one main transformer switch is used as an outgoing line.

[0070] The present invention will be illustrated below through specific embodiments:

[0071] The present invention is as follows Figures 1-12 As shown:

[0072] 1. The new mobile substation consists of three parts: a 6(10)kV box-type transformer, a 35kV box-type transformer automation box, and a 35kV box-type transformer automation box. When combined, they can form a 35kV substation. When used separately, they can be used for the transformation of the 6(10)kV and 35kV substation systems, respectively.

[0073] 2. The base of the transformer box adopts a modular design. The 6(10)kV transformer box, the 35kV transformer box and the automation box each have their own base. The three bases can be spliced ​​together according to the site conditions, which is quick to install and avoids the problems of long construction period and high cost caused by foundation construction. At the same time, it reduces the footprint.

[0074] 3. Each section of the 6(10)kV and 35kV box-type substations is equipped with two power distribution boxes. The high-voltage cables of the box-type substations are prefabricated in advance. The prefabricated cables can be reused and connected through the distribution boxes. The distribution boxes are placed in the corresponding positions according to the cable length. This is to prevent the original cable length from being insufficient and to achieve the purpose of quick connection, which greatly shortens the cutting and modification time and saves money.

[0075] 4. The 6(10)kV and 35kV outgoing line bays adopt a miniaturized design with more outgoing line bays to meet the system transformation requirements.

[0076] The 5-6(10)kV box-type substation is equipped with two 100kVA station service transformers to meet the substation renovation requirements. At the same time, by changing the primary coil connection method of the station service transformers, it can meet the renovation requirements of both 6kV and 10kV systems. The 6(10)kV box-type substation is equipped with both 6kV and 10kV PTs. When used for different systems, the appropriate PT is adopted, thus achieving the purpose of making the box-type substation suitable for both 6kV and 10kV systems.

[0077] 6. The primary and secondary cables between the 6(10)kV and 35kV transformer substations and the automation box are installed using plug connections, which saves time and effort. The cables between the 6(10)kV and 35kV transformer substations and the power distribution box and the main transformer can be directly connected using prefabricated cables.

[0078] 7. Since different substations have different rated currents, the CT uses tapped current transformers to meet the renovation needs of different substations.

[0079] 8. Enables multi-scenario applications: ① When used for the overall renovation of a 35kV substation, a 35kV substation can be quickly assembled from a 6(10)kV box-type transformer, a 35kV box-type transformer, and an automation box; ② When used for the renovation of the 6kV part of a substation, only the 6(10)kV box-type transformer is put into use, while the primary coil of the station service transformer is changed to a delta connection and the PT is replaced with a 6kV PT; ③ When used for the renovation of the 10kV part of a substation, only the 6(10)kV box-type transformer is put into use, while the primary coil of the station service transformer is changed to a star connection and the PT is replaced with a 10kV PT; ④ When used for the renovation of the 35kV part of a 35kV substation, only the 35kV box-type transformer is put into use, and the relay protection uses the original control room protection. When cooperating with the relay protection renovation, the automation box is put into use at the same time; ⑤ When used for the renovation of the 35kV part of a 110kV substation, only the 35kV box-type transformer is put into use, and the relay protection uses the original control room protection device. When upgrading the 35kV section of a 110kV substation, if there are many outgoing lines, one of the two busbar sections can be switched and modified first, and then the other section can be switched. In this case, one main transformer switch is used as an outgoing line.

[0080] The novel 35kV mobile substation described in this invention has at least the following improvements and beneficial effects compared with the prior art:

[0081] 1) It features highly integrated 6(10)kV and 35kV box-type substations with automated boxes. It adopts a single busbar segmented wiring method, and the number of outgoing line bays is large enough to meet the needs of oilfield power grid transformation.

[0082] 2) Fully functional and does not require external equipment, the 6(10)kV box transformer is equipped with station service transformer and AC / DC panel, and adopts a miniaturized design with a large number of outgoing line bays.

[0083] 3) The 6(10)kV box-type transformer, 35kV box-type transformer, and automation box base adopt modular design. When used for the overall renovation or installation of the substation, the box-type transformer base can be combined together, and the three bases can be spliced ​​together arbitrarily according to the site conditions. The installation is quick and convenient, reducing the floor space and construction period.

[0084] 4) A 6(10)kV box-type transformer, a 35kV box-type transformer, and an automation box can be combined to form a 35kV substation. They can be used separately for the 6(10)kV or 35kV part of the substation renovation.

[0085] 5) Each section of the 6(10)kV and 35kV box-type transformer is equipped with two cable head junction boxes for easy and quick connection.

[0086] 6) Since different substations have different rated currents, the secondary winding of the current transformer is equipped with taps to meet the renovation needs of different substations.

[0087] 7) The 6(10)kV box-type transformer is equipped with two 100kVA station service transformers to meet the needs of substation renovation. At the same time, the station service transformers can be renovated into 6kV and 10kV systems by changing the primary winding connection method. When used in the 10kV system, the primary winding of the station service transformer adopts a star connection, and when used in the 6kV system, the primary winding of the station service transformer adopts a delta connection.

[0088] 8) The 6(10)kV box-type transformer is equipped with two types of PTs: 6kV and 10kV. The appropriate PT is used when it is used in different systems.

[0089] 9) The secondary cables between 35kV and 6kV transformer substations and automation boxes are connected by plugs, making installation quick and convenient.

[0090] 10) The primary cables from the two 35kV and 6kV transformer substations to the main transformer can be directly connected using prefabricated special cables, achieving rapid connection.

[0091] 11) The 35kV box-type transformer is equipped with an automation box for the overall renovation of the 35kV substation and the installation of new stations. The automation box is equipped with AC and DC panels to provide power for the 35kV section, main transformer protection, signal and operation. The AC panel power supply adopts the power supply of the 6(10)kV box-type transformer or the original 6(10)kV high-voltage room station power supply. The 35kV automation box is equipped with main transformer protection, measurement and control devices and remote control devices.

[0092] 12) The 35kV box-type substation adopts a single busbar segmented connection. Each busbar segment is equipped with one incoming line, two outgoing lines, and one main transformer switch. The incoming and outgoing line protection devices are installed on the switch cabinet. The main transformer switch cabinet is equipped with outgoing line protection devices. When used for main transformer renovation, only overcurrent protection is activated for high-level transformer backup. When the 35kV box-type substation is used for 35kV outgoing line renovation of a 110kV substation, each bay has corresponding outgoing line protection devices.

[0093] This application is intended to illustrate how the disclosed technology and various embodiments can be used, and is not intended to limit its true scope and equivalent spirit and meaning. Furthermore, the foregoing description is not exhaustive of all possibilities or to limit the scope of protection to the precise forms disclosed. Changes and variations are possible in accordance with the foregoing teachings. The selected and illustrated embodiments provide the best illustration of the principles of the technology and its practical application, and enable those skilled in the art to use the disclosed technology for various conceivable specific applications with various modifications. Therefore, various changes and modifications made to the above embodiments without substantially departing from the spirit and principles of the technology described herein are intended to be included within the scope of this disclosure.

Claims

1. A method for using a 35kV mobile substation, characterized in that, Includes the following steps: Provides a first transformer substation, an automation box connected to the first transformer substation, and a second transformer substation, wherein the first transformer substation, the automation box, and the second transformer substation each have a modular base, the modular bases can be arbitrarily spliced ​​and installed relative to each other, the first transformer substation is a 35kV transformer substation, and the second transformer substation is a 6kV or 10kV transformer substation. When used for the overall renovation of a 35kV substation, the first transformer box, the second transformer box, and the automation box are assembled into a 35kV substation using their respective modular bases. When used for the 6kV part of the substation renovation, only the second box transformer is put into use, and the primary coil of the station service transformer is changed to delta connection, and the PT is replaced with a 6kV PT; when used for the 10kV part of the substation renovation, only the second box transformer is put into use, and the primary coil of the station service transformer is changed to star connection, and the PT is replaced with a 10kV PT. When used for the 35kV part of the 35kV substation renovation, only the first transformer box is put into use, and the relay protection uses the original control room protection. When coordinating with the relay protection renovation, the automation box is connected to the first transformer box. When used for the 35kV part of the 110kV substation renovation, only the first transformer box is put into use, and the relay protection uses the original control room protection device; when there are a large number of outgoing lines, one of the two busbars is switched and modified first, and then the other section is switched. At this time, one main transformer switch is used as an outgoing line.

2. The method of using the 35kV mobile substation according to claim 1, characterized in that, The first transformer substation and / or the second transformer substation adopt a single busbar segmented connection method.

3. The method of using the 35kV mobile substation according to claim 1, characterized in that, Each section of the first and / or second transformer substation is equipped with at least one power distribution box for quick connection.

4. The method of using the 35kV mobile substation according to claim 1, characterized in that, The second transformer substation includes a station service transformer and an AC / DC power supply unit installed therein.

5. The method of using the 35kV mobile substation according to claim 4, characterized in that, The station service transformer includes a 100kVA station service transformer.

6. The method of using the 35kV mobile substation according to claim 1, characterized in that, The second transformer has a voltage transformer corresponding to 6kV and a voltage transformer corresponding to 10kV.

7. The method of using the 35kV mobile substation according to claim 1, characterized in that, The automation box includes an AC / DC power supply, a 35kV power supply section, main transformer protection, and signal and operating power supplies.

8. The method of using the 35kV mobile substation according to claim 1, characterized in that, The first and second transformer substations can be directly connected via a secondary cable with a plug.

9. The method of using the 35kV mobile substation according to claim 1, characterized in that, The 35kV mobile substation further includes a main transformer, and the first and second transformers are respectively connected to the main transformer via high-voltage cables with plugs.

10. The method of using the 35kV mobile substation according to claim 1, characterized in that, The first transformer adopts a single busbar segmentation, with each busbar segment equipped with one incoming line, two outgoing lines, and one main transformer switch, and the outgoing line protection device is installed on the switch cabinet.

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