35kV mobile substation and use method thereof

Abstract

The invention belongs to the field of petrochemical engineering, and particularly relates to a 35kV mobile substation and a using method thereof, and the 35kV mobile substation comprises a first box substation; the automation box is connected with the first box transformer substation; the first box-type transformer substation, the automatic box-type transformer substation and the second box-type transformer substation are respectively provided with a modular base, and the modular bases can be randomly spliced relative to one another. By means of the technical scheme, the construction period can be effectively shortened, rapid assembly of the box transformer substation is achieved according to the actual situation, and the occupied area is reduced. Moreover, the device is high in applicability, complete in function, capable of being repeatedly used, suitable for installation and transformation of all transformer substations in oil fields, and capable of being used for installation of new stations and transformation of transformer substations. Meanwhile, the device can be used as a whole and can also be used in a split mode, and the device is used for transformation of 6 (10) kV and 35 kV parts of a transformer substation respectively and is high in universality.

Description

Technical Field

[0001] The invention belongs to the field of petrochemical industry, and in particular relates to a 35kV mobile substation and a use method thereof. Background Art

[0002] At present, temporary transition measures are required for substation renovation and emergency rescue, but the installation of new stations takes a long time and is expensive. There is no corresponding product for the overall renovation of substations, or for splitting and using them for the renovation of 6(10)kV and 35kV parts respectively, and each part can be quickly installed to form a 35kV mobile substation. In short, the existing technology has at least the following problems:

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

[0004] 2) External station transformers, knife switches and other primary equipment are required.

[0005] 3) It requires primary and secondary equipment to be interconnected, which results in complex construction, long construction period and large investment.

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

[0007] Based on this, there is room for improvement in the prior art. Summary of the invention

[0008] This application summarizes various aspects of the embodiments and should not be used to limit the claims. Other embodiments are conceivable based on the technology described herein, which will be apparent to those skilled in the art after studying the following drawings and detailed descriptions, and these embodiments are intended to be included within the scope of this application.

[0009] In order to solve the problems existing in the prior art, according to one aspect of the present invention, a 35kV mobile substation is provided, which includes: a first box transformer; an automation box connected to 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, and the modular base can be arbitrarily spliced ​​relative to each other.

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

[0011] In an embodiment of the present invention, the first box-type transformer and / or the second box-type transformer adopts a single busbar segmented wiring mode.

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

[0013] In an embodiment of the present invention, the second box-type transformer includes a station transformer and an AC / DC panel arranged therein.

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

[0015] In an embodiment of the present invention, when the 35kV mobile substation is used for 10kV system transformation, the station transformer primary coil of the second box transformer adopts a star connection; when the 35kV mobile substation is used for 6kV system transformation, the station transformer primary coil of the second box transformer adopts a delta connection.

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

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

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

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

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

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

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

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

[0024] In an embodiment of the present invention, the method of use comprises the following steps:

[0025] When used for 6kV partial transformation of a substation, only the second box-type transformer is put into use, and the primary coil of the substation transformer is changed to delta connection, and the PT is replaced with a 6kV PT; and

[0026] When used for 10kV partial transformation of the substation, only the second box transformer is put into use, and the primary coil of the station 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 partial transformation of a 35kV substation, only the first box transformer is put into use, and the relay protection uses the original control room protection. When cooperating with the relay protection transformation, the automation box is connected to the first box transformer.

[0028] In an embodiment of the present invention, the method of use comprises the following steps:

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

[0030] When there are a large number of outgoing lines, cut and modify one of the two busbar sections first and then cut the other section. 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, easy to install, short construction period, small footprint, low investment, can be reused, and meet 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 box transformer base adopts a modular design. The 6(10)kV box transformer, 35kV box transformer, and automation box have their own bases. The three bases can be spliced ​​arbitrarily according to the site conditions, and the installation is fast, avoiding the long construction period and high cost caused by the foundation construction, and reducing the floor space. 4) The 6(10)kV box transformer and the 35kV box transformer are directly connected with a dedicated secondary cable with a plug, which saves time and effort. 5) The 6(10)kV box transformer, the 35kV box transformer and the main transformer are directly connected with a prepared dedicated cable and can be used. 6) The 6(10)kV box transformer and the 35kV box transformer can be combined to form a mobile 35kV substation, and can be used separately for the 6(10)kV or 35kV system transformation of the substation. 7) The secondary winding of the box transformer current transformer has taps to meet the transformation needs of different substations. 8) The box transformer is equipped with station transformer, AC and DC system, switch, fire protection, application lighting, telecontrol communication, video monitoring, and no other external equipment is required. 9) It has remote control, telemetry, teleadjustment, and telesignaling functions to meet unmanned operation requirements. 10) The present invention can realize multi-scenario applications.

[0032] Those skilled in the art will understand and appreciate these and other aspects, objects and features of the present disclosure after studying the following specification, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] For a more complete understanding of the embodiments of the present application, reference should be made to the embodiments illustrated in more detail in the accompanying drawings and described by way of example below, in which:

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

[0035] Figure 2 A connection diagram of a primary coil of a station 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 by an embodiment of the present invention;

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

[0039] Figure 6 A diagram of the 6(10) and 35kV box-type transformers being split and used separately provided in an embodiment of the present invention;

[0040] Figure 7 A schematic diagram of the 35kV partial transformation of a 35kV substation provided in an embodiment of the present invention;

[0041] Figure 8 Schematic diagram of the 35kV partial transformation of a 110kV substation provided in an embodiment of the present invention (each section has 3 or fewer outgoing lines);

[0042] Fig. 9 Schematic diagram of the 35kV partial transformation of a 110kV substation provided by an embodiment of the present invention (each section has more than 3 outgoing lines);

[0043] Fig.10 A schematic diagram of a connection of a secondary connection cable provided in an embodiment of the present invention;

[0044] Fig.11 A schematic diagram of switching and modifying a power distribution box provided by an embodiment of the present invention;

[0045] Fig.12 A schematic diagram of a main transformer high-voltage backup and an outgoing line protection device using the same type of outgoing line protection device provided in an embodiment of the present invention;

[0046] Fig.13 A schematic flow chart of a method for using a 35kV mobile substation provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] Embodiments of the present disclosure are described below. 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 features may be exaggerated or minimized to show the details of a particular component. Therefore, the specific structural and functional details disclosed herein should not be interpreted as limiting, but merely as a representative basis for teaching those skilled in the art to use the present application in various ways. As will be understood by those skilled in the art, the various features shown and described with reference to any one of the figures may be combined with the features shown in one or more other figures to produce embodiments that are not explicitly shown or described. The combination of features shown provides representative embodiments for typical applications. However, various combinations and modifications of features consistent with the teachings of the present disclosure may be desirable for certain specific applications or embodiments.

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

[0049] One or more embodiments of the present application will be described below in conjunction with the accompanying drawings. The flowchart illustrates the process performed by the system according to the present application. It can be understood that the execution of the flowchart does not need to be performed in sequence, one or more steps can be omitted, one or more execution steps can be added, and one or more steps can be performed in sequence or in reverse order, and even in some embodiments, one or more steps can be performed simultaneously.

[0050] The present invention provides a 35kV mobile substation and a method for using the same. According to the installation and modification requirements, the 35kV mobile substation can be used for new station installation and temporary transition of 35kV substation overall modification, and can also be split and used for temporary transition of 6(10)kV and 35kV partial modification of substations, respectively. It has strong versatility and a wide range of applications.

[0051] According to one aspect of the present invention, referring to Figure 1-Figure 12 , a 35kV mobile substation is provided, which includes: a first box transformer 3; an automation box 6 connected to the first box transformer 3; and a second box transformer 1, wherein the first box transformer 3, the automation box 6 and the second box transformer 1 each have a modular base, and the modular base can be arbitrarily spliced ​​relative to each other. In an embodiment of the present invention, the first box transformer 3 can be a 35kV box transformer, and the second box transformer 1 can be a 6kV or 10kV box transformer, that is, a 6(10)kV box transformer. The modular bases 9 of the first box transformer 3, the automation box 6 and the second box transformer 1 can be arbitrarily spliced ​​according to site conditions, and can be installed quickly, avoiding the problems of long construction period and high cost caused by foundation construction, while reducing the floor space. Reference Figure 4 , which shows a schematic diagram of a modular base 9. The modular bases 9 of the first box transformer 3, the automation box 6 and the second box transformer 1 may be the same or different, for example, having different sizes according to their respective sizes. Figure 5a-5c Three modular bases are shown assembled together according to actual installation needs, where: Figure 5a The modular bases of the first box transformer 3, the automation box 6 and the second box transformer 1 are placed side by side along their length direction; Figure 5bThe modular bases of the first box transformer 3 and the second box transformer 1 are placed side by side along their length direction, and the modular base of the automation box 6 is connected to the first box transformer 3 and the second box transformer 1 along their width direction; and Figure 5c The modular bases of the first box transformer 3, the automation box 6 and the second box transformer 1 are placed side by side along their width direction. It should be understood that Figure 5a-5c The splicing orientations of the three modular bases are illustrated only in an exemplary manner. However, other splicing methods may be included according to actual needs, and all are included in the scope of the present invention.

[0052] In the embodiment of the present invention, the first box transformer 3 and / or the second box transformer 1 adopts a single busbar segmented wiring method, with a large number of outgoing line intervals, which can meet the needs of oil field power grid transformation.

[0053] In an embodiment of the present invention, each section of the first box transformer 3 and / or the second box transformer 1 is provided with at least one power distribution box for quick connection. In one embodiment, each section of the 6(10)kV and 35kV box transformers is equipped with two power distribution boxes. The high-voltage cables of the box transformers are prefabricated in advance. The prefabricated cables can be reused and connected through distribution boxes. The distribution boxes are placed in corresponding positions according to the length of the cables. First, they prevent the original cable from being insufficient in length. Second, they achieve the purpose of quick connection, greatly shortening the cutting and modification time, while saving money. Fig.11 In the illustrated embodiment, the box-type transformer may correspond to four power distribution boxes, and when modification is required, the high-voltage chamber is connected to each power distribution box.

[0054] In an embodiment of the present invention, the second box transformer 1 includes a station transformer 8 and an AC / DC panel (not shown) arranged therein, and adopts a miniaturized design with a large number of outgoing line intervals. The station transformer 8 includes a 100kVA station transformer. In one embodiment, a 6 (10) kV box transformer is equipped with two 100kVA station transformers to meet the needs of substation transformation, and at the same time, by changing the primary coil connection method of the station transformer 8, the transformation needs of the 6kV and 10kV systems are met. Figure 2 As shown, when the 35kV mobile substation is used for 10kV system transformation, the primary coil of the second box transformer 1 station transformer 8 adopts star connection; when the 35kV mobile substation is used for 6kV system transformation, the primary coil of the second box transformer 1 station transformer 8 adopts delta connection.

[0055] In the embodiment of the present invention, the second box transformer 1 has a voltage transformer corresponding to 6kV and a voltage transformer corresponding to 10kV. When used in different systems, corresponding PTs are adopted, thereby achieving the purpose of making the box transformer applicable to both 6kV and 10kV systems.

[0056] In an embodiment of the present invention, the automation box 6 includes an AC / DC panel, a 35kV supply part, a main transformer protection, and a signal and operation power supply arranged therein. In one embodiment, the AC panel power supply adopts a 6 (10) kV box transformer or an original 6 (10) kV high voltage room station transformer, and the 35kV automation box is equipped with a main transformer protection, a measurement and control device, and a telecontrol device.

[0057] In the embodiment of the present invention, the first box transformer 2 and the second box transformer 1 can be directly connected through a secondary cable 10 with a plug, such as Fig.10 As shown, this plug-type direct connection method saves time and effort.

[0058] In the embodiment of the present invention, the 35kV mobile substation further comprises a main transformer 2, a first box transformer 3 and a second box transformer 1 respectively connected via a high-voltage cable 7 with a plug ( Figure 3 In one embodiment, the 35kV and 6kV box transformers are connected to the main transformer primary cables by directly connecting them with prefabricated special cables, thus realizing a quick connection. In addition, the 35kV mobile substation may also include a power source 4, such as a 35KV incoming line, to supply power to the first box transformer 3.

[0059] In the embodiment of the present invention, the first box transformer 3 adopts single busbar segmentation, each section of the busbar is equipped with one incoming line, two outgoing lines, and a main transformer switch, and the outgoing line protection device is arranged on the switch cabinet. When used for the main transformer transformation, only the overcurrent protection is put into use for the transformer high backup. In one embodiment, when the 35kV box transformer is used for the 35kV outgoing line transformation of the 110kV substation, each interval has a corresponding outgoing line protection device, such as Fig.12 shown.

[0060] The 35kV mobile substation described in the present invention is applicable to a variety of application scenarios and has strong versatility. Some application scenarios are exemplified as follows:

[0061] Figure 6 The figure shows the splitting and separate use of 6(10) and 35kV box transformers. When the 6(10) and 35kV box transformers are split and used, each section of the 6(10)kV box transformer or 35kV box transformer can correspond to at least one power distribution box, and the box transformer and the power distribution box can be connected by a primary cable, and the power distribution box is further connected to the load. In addition, the 6(10)kV box transformer or 35kV box transformer is connected to the control main transformer protection device through the main transformer secondary cable. Compared with the prior art, the 35kV mobile substation can be split and used for temporary transition of the transformation of the substation 35kV switch cabinet and 6(10)kV switch cabinet.

[0062] Figure 7The schematic diagram of the 35kV partial transformation of the 35kV substation is shown, in which each section of the 35kV box transformer can be connected to at least one power distribution box, and each power distribution box is further connected to the 35kV main transformer and the 35kV inlet and outlet lines. In addition, the 35kV box transformer is connected to the automation box. Compared with the prior art, the transformation transition process can achieve fast connection, shorten the transformation time, and shorten the construction period.

[0063] Figure 8 The schematic diagram of the 35kV part of the 110kV substation is shown. Figure 7 The difference between the embodiments is that the 35kV box transformer is connected to the control main transformer protection device instead of the automation box. When used for the 35kV partial transformation of the 110kV substation, it needs to be used in conjunction with the 110kV main transformer protection, and the automation box is used when the 35kV substation is transformed as a whole.

[0064] Fig. 9 The schematic diagram of the 35kV part transformation of the 110kV substation is shown. When there are many 35kV outgoing lines in the 110kV substation, the 35kV switch of one section of busbar is transformed first, and then the 35kV switch of another section of busbar is transformed, which solves the problem of the small number of 35kV outgoing line switches of the 35kV box-type transformer. The method is to use one main transformer switch as the main transformer switch, and the other main transformer switch as the 35kV outgoing line. The 35kV bus tie switch is put into use, and the 35kV box-type transformer 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 Fig.13 As shown, it includes the following steps a: providing a first box transformer, an automation box connected to 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, and the modular base can be arbitrarily spliced ​​relative to each other. In an embodiment of the present invention, the first box transformer is a 35kV box transformer, and the second box transformer is a 6kV or 10kV box transformer.

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

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

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

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

[0070] The present invention is described below by specific embodiments:

[0071] The present invention Figure 1-Figure 12 As shown:

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

[0073] 2. The base of the box-type transformer adopts a modular design. The 6(10)kV box-type transformer, 35kV box-type transformer and automation box each have their own base. The three bases can be spliced ​​together as needed according to site conditions and can be installed quickly, thus avoiding the long construction period and high cost caused by foundation construction, while reducing the floor space occupied.

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

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

[0076] 5. The 6(10)kV box-type transformer is equipped with two 100kVA station transformers to meet the needs of substation transformation. At the same time, by changing the primary coil connection method of the station transformer, it meets the transformation needs of the 6kV and 10kV systems. The 6(10)kV box-type transformer is equipped with two 6kV and 10kV PTs. When used in different systems, the corresponding PT is used, achieving the purpose of the box-type transformer being suitable for both 6kV and 10kV systems.

[0077] The primary and secondary cables between 6(10)kV box-type transformers, 35kV box-type transformers and automation boxes are connected by plugs, which saves time and effort. The cables between 6(10)kV and 35kV box-type transformers and power distribution boxes and main transformers can be directly connected with prefabricated cables.

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

[0079] 8. Realize multi-scenario application: ① When used for the overall transformation of a 35kV substation, a 35kV substation can be quickly assembled from a 6(10)kV box transformer, a 35kV box transformer, and an automation box; ② When used for the 6kV partial transformation of a substation, only the 6(10)kV box transformer is put into use, and the station transformer primary coil is changed to delta connection, and the PT is replaced with a 6kVPT; ③ When used for the 10kV partial transformation of a substation, only the 6(10)kV box transformer is put into use, and the station transformer primary coil is changed to star connection, and the PT is replaced with a 10kVPT; ④ When used for the 35kV partial transformation of a 35kV substation, only the 35kV box transformer is put into use, and the relay protection uses the original control room protection. When combined with the relay protection transformation, the automation box is put into use at the same time; ⑤ When used for the 35kV partial transformation of a 110kV substation, only the 35kV box transformer is put into use, and the relay protection uses the original control room protection device. When used for the 35kV partial reconstruction of a 110kV substation, if there are a large number of outgoing lines, one of the two busbar sections can be cut and modified first, and then the other section can be cut. At this time, one main transformer switch can be used as an outgoing line.

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

[0081] 1) It has highly integrated 6(10)kV box-type transformer, 35kV box-type transformer and automation box. It adopts single busbar segmented wiring mode and has a large number of outgoing line intervals to meet the needs of oilfield power grid transformation.

[0082] 2) It is fully functional and does not require any external equipment. The 6(10)kV box-type transformer is equipped with a station transformer and AC / DC panels, and adopts a miniaturized design with a large number of outgoing line intervals.

[0083] 3) The 6(10)kV box-type transformer, 35kV box-type transformer and automation box bases are modularly designed. When used for overall transformation or installation of substations, the box-type transformer bases 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 shortening the construction period.

[0084] 4) 6(10)kV box-type transformer, 35kV box-type transformer and automation box can form a 35kV substation, and can be used separately for 6(10)kV or 35kV partial transformation of the substation.

[0085] 5) Each section of 6(10)kV and 35kV box-type transformers is equipped with 2 cable terminal boxes for quick connection.

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

[0087] 7) The 6(10)kV box transformer is equipped with two 100kVA station transformers to meet the needs of substation transformation. At the same time, the station transformer has 6kV and 10kV system transformation by changing the primary winding connection method. When used in the 10kV system, the station transformer primary coil adopts star connection, and when used in the 6kV system, the station transformer primary coil adopts delta connection.

[0088] 8) 6(10)kV box-type transformer is equipped with two types of PTs: 6kV and 10kV. When used in different systems, corresponding PTs should be used.

[0089] 9) The secondary cables between 35kV, 6kV box-type transformers and automation boxes are connected by plugs, which makes installation quick and easy.

[0090] 10) The primary cables from the 35kV and 6kV box-type transformers to the main transformer can be directly connected using prefabricated special cables, achieving quick connection.

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

[0092] 12) The 35kV box-type transformer adopts a single busbar segmentation for primary wiring. Each section of the busbar is equipped with one incoming line, two outgoing lines and a main transformer switch. The incoming and outgoing line protection devices are installed on the switch cabinet. The main transformer switch cabinet is equipped with an outgoing line protection device. When used for main transformer transformation, only overcurrent protection is used for transformer high backup. When the 35kV box-type transformer is used for 35kV outgoing line transformation of 110kV substation, each interval has a corresponding outgoing line protection device.

[0093] This application document is intended to illustrate how to use the disclosed technology and various embodiments, but is not intended to limit the scope and spirit to which it is actually directed and equivalent. In addition, the above description is not intended to be exhaustive of all possibilities or to limit the scope of protection to the precise form disclosed. According to the above teachings, changes and variations are possible. The selected and illustrated embodiments provide the best description of the principles of the technology and its practical application, and enable those skilled in the art to use the disclosed technology for various changes in various conceivable specific applications. Therefore, without substantially departing from the spirit and principles of the technology described herein, the various changes and modifications made to the above embodiments are intended to be included in the scope of this disclosure.

Claims

1. A 35kV mobile substation, characterized in that: include: First box change; an automation box connected to the first box transformer; as well as The second box changes, The first box transformer, the automation box and the second box transformer each have a modular base, and the modular bases can be arbitrarily spliced ​​relative to each other.

2. The 35kV mobile substation according to claim 1, characterized in that: The first box transformer is a 35kV box transformer, and the second box transformer is a 6kV or 10kV box transformer.

3. The 35kV mobile substation according to claim 1, characterized in that: The first box-type transformer and / or the second box-type transformer adopts a single busbar segmented wiring method.

4. The 35kV mobile substation according to claim 3, characterized in that: Each section of the first box-type transformer and / or the second box-type transformer is provided with at least one power distribution box for quick connection.

5. The 35kV mobile substation according to claim 1, characterized in that: The second box transformer includes a station transformer and an AC / DC panel arranged therein.

6. The 35kV mobile substation according to claim 5, characterized in that: The station transformer includes a 100kVA station transformer.

7. The 35kV mobile substation according to claim 2, characterized in that: When the 35kV mobile substation is used for 10kV system transformation, the primary coil of the second box transformer is connected in star shape; when the 35kV mobile substation is used for 6kV system transformation, the primary coil of the second box transformer is connected in delta shape.

8. The 35kV mobile substation according to claim 2, characterized in that: The second box-type transformer has a voltage transformer corresponding to 6 kV and a voltage transformer corresponding to 10 kV.

9. The 35kV mobile substation according to claim 1, characterized in that: The automation box includes an AC / DC panel, a 35kV supply part, a main transformer protection, and a signal and operating power supply arranged therein.

10. The 35kV mobile substation according to claim 1, characterized in that: The first box-type transformer and the second box-type transformer can be directly connected via a secondary cable with a plug.

11. The 35kV mobile substation according to claim 2, characterized in that: It further includes a main transformer, and the first box transformer and the second box transformer are respectively connected to the main transformer through high-voltage cables with plugs.

12. The 35kV mobile substation according to claim 1, characterized in that: The first box-type transformer adopts single busbar segmentation, each busbar segment is equipped with one incoming line, two outgoing lines, a main transformer switch, and the outgoing line protection device is arranged on the switch cabinet.

13. A method for using a 35kV mobile substation, characterized in that: The following steps are involved: A first box transformer, an automation box connected to the first box transformer, and a second box transformer are provided, wherein the first box transformer, the automation box and the second box transformer each have a modular base, and the modular bases can be arbitrarily spliced ​​relative to each other.

14. The method of use according to claim 13, characterized in that: The first box transformer is a 35kV box transformer, and the second box transformer is a 6kV or 10kV box transformer.

15. The method of use according to claim 14, characterized in that: The following steps are involved: When used for overall transformation of a 35kV substation, the first box transformer, the second box transformer and the automation box are assembled into a 35kV substation through their respective modular bases.

16. The method of use according to claim 14, characterized in that: The following steps are involved: When used for 6kV partial transformation of a substation, only the second box-type transformer is put into use, and the primary coil of the substation transformer is changed to delta connection, and the PT is replaced with a 6kV PT; and When used for 10kV partial transformation of the substation, only the second box transformer is put into use, and the primary coil of the station transformer is changed to star connection, and the PT is replaced with a 10kV PT.

17. The method of use according to claim 14, characterized in that: The following steps are involved: When used for 35kV partial transformation of a 35kV substation, only the first box transformer is put into use, and the relay protection uses the original control room protection. When coordinated with the relay protection transformation, the automation box is connected to the first box transformer.

18. The method of use according to claim 14, characterized in that: The following steps are involved: When used for partial transformation of 35kV of 110kV substation, only the first box transformer is put into use, and the relay protection uses the original control room protection device; When there are a large number of outgoing lines, cut and modify one of the two busbar sections first and then cut the other section. At this time, one main transformer switch is used as an outgoing line.

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