CN217656257U

CN217656257U - Cabinet type high-voltage automatic inductance compensation device

Info

Publication number: CN217656257U
Application number: CN202221792486.3U
Authority: CN
Inventors: 杨康; 杨冬; 赵卫锋; 郝宇; 王登辉
Original assignee: Shaanxi Zhengtai Capacitor Technology Co ltd; Chint Electric Co Ltd
Current assignee: Shaanxi Zhengtai Capacitor Technology Co ltd; Chint Electric Co Ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-10-25
Anticipated expiration: 2032-07-12

Abstract

The utility model provides a cabinet type high-voltage automatic inductance compensation device, which belongs to the technical field of reactive compensation devices and comprises an incoming line cabinet and a plurality of inductance compensation cabinets, wherein the incoming line cabinet and the plurality of inductance compensation cabinets are spliced by building blocks to form a plurality of groups of equal-capacitance or unequal-capacitance branches to realize multi-level capacitance adjustment; a primary incoming cable is arranged below the interior of the incoming cabinet, a disconnecting link is arranged above the interior of the incoming cabinet, the primary incoming cable is electrically connected with the disconnecting link, an incoming cabinet secondary chamber is arranged at the upper part of the incoming cabinet, and a high-voltage intelligent controller is arranged in the incoming cabinet secondary chamber; a protection CT is arranged above the inside of each inductance compensation cabinet, a lightning rod and a switching switch are arranged in the middle of the inside of each inductance compensation cabinet, and a reactor is arranged below the inside of each inductance compensation cabinet. The utility model discloses can realize multistage accent appearance, have branch road protect function, the compact of overall structure, intelligent sampling, policy control, compensation are accurate, installation and debugging are simple.

Description

Cabinet type high-voltage automatic inductance compensation device

Technical Field

The utility model belongs to the technical field of reactive power compensator, concretely relates to automatic inductance compensation device of cabinet type high pressure.

Background

The inductance compensation device is mainly used for compensating capacitive charging current of a circuit and limiting the rise of system power frequency voltage and operation overvoltage, so that the insulation level of the system is reduced, and the reliable operation of the circuit is ensured. With the continuous expansion of urban scale and the transformation of urban power grids in China, overhead line power transmission is gradually replaced by underground cable power transmission, so that the capacitive charging current to ground of a power transmission network is increased rapidly. And at present, the inductive compensation in the market is lack of complete equipment, no inductive adjustment function and no protection. In order to reduce the increase of the power frequency voltage of the system and the insulation level of the system, ensure the safe and reliable operation of the system and the power supply quality of the urban power grid, the high-voltage automatic inductance compensation device is widely applied to high-voltage, ultrahigh-voltage and long-distance power transmission systems and is also commonly applied to urban power distribution grids, so that the cabinet type high-voltage automatic inductance compensation device is necessary to be provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: the utility model provides an automatic inductance compensation arrangement of cabinet type high pressure, the utility model discloses can realize multistage accent and hold, have branch circuit protect function, compact, intelligent sampling of overall structure, policy control, compensation are accurate, installation and debugging are simple.

The utility model adopts the technical proposal that: a cabinet type high-voltage automatic inductance compensation device comprises a wire inlet cabinet and a plurality of inductance compensation cabinets, wherein the wire inlet cabinet and the plurality of inductance compensation cabinets are spliced into a plurality of groups of equal-capacitance or unequal-capacitance branches by adopting a building block type to realize multi-stage capacitance adjustment; a primary incoming cable is arranged below the interior of the incoming cabinet, a disconnecting link is arranged above the interior of the incoming cabinet, the primary incoming cable is electrically connected with the disconnecting link, an incoming cabinet secondary chamber is arranged at the upper part of the incoming cabinet, and a high-voltage intelligent controller is arranged in the incoming cabinet secondary chamber; every inside top of inductance compensation cabinet is equipped with the protection CT, be equipped with lightning rod and fling-cut switch in the middle of the inductance compensation cabinet is inside, the inside below of inductance compensation cabinet is equipped with the reactor, protection CT, fling-cut switch and reactor electric property are established ties, lightning rod and fling-cut switch and reactor electric connection, fling-cut switch and protection CT and high-voltage intelligent control ware electric connection.

According to the technical scheme, the protection CT, the switching switch and the reactor are connected in series through the hard bus bar, the switching switch, the protection CT and the high-voltage intelligent controller are connected through the hard bus bar, and the lightning rod, the switching switch and the reactor are in soft connection through copper wires.

In addition, the technical scheme is further limited, and a voltmeter and a charged display are further arranged in the secondary chamber of the incoming line cabinet.

In order to further limit the technical scheme, a sensor is arranged on the wire inlet side of the disconnecting link.

In addition, the technical scheme is further limited, and the incoming line cabinet is provided with an RS232 or RS485 serial communication interface.

The technical scheme is further limited, a compensation cabinet secondary chamber is arranged at the upper part of each inductance compensation cabinet, and a manual/automatic change-over switch, an ammeter and a switching-on/off button are arranged in each compensation cabinet secondary chamber.

The technical scheme is further limited, and each cabinet door of the inductance compensation cabinet is provided with an illuminating lamp, an electromagnetic lock and a travel switch.

In addition, the technical scheme is further limited, and the incoming line cabinet and the plurality of inductance compensation cabinets are connected through the hard bus copper bars.

The technical scheme is further limited, the front and the back of the cabinet body of the incoming line cabinet and the inductance compensation cabinet are both opened, the top, the bottom and the two side sealing plates of the cabinet body are fixed, and the cabinet body is provided with a ventilation and heat dissipation window.

The technical scheme is further limited, and lifting rings are arranged on the upper portions of the incoming line cabinet and the inductance compensation cabinet.

The utility model has the advantages compared with the prior art:

1. the incoming line cabinet and the plurality of inductance compensation cabinets in the scheme adopt a building block type splicing structure and can be divided into a plurality of branches, the capacity can be compensated in groups according to equal capacity or unequal capacity, multi-level capacity adjustment can be realized, and the special design that the building block type splicing structure is adopted by the complete set of cabinets increases the universality of the cabinets, so that the assembly of products is completed in a factory at one time, the field installation workload is reduced, the production benefit is greatly improved, the field installation and debugging time is reduced, and the operation reliability of the products is improved;

2. according to the scheme, the high-voltage intelligent controller has the functions of double main transformers, double buses and bus-bar connection sampling, can intelligently identify the voltage at the low-voltage side of the double main transformers, the bus-bar connection position, the power factor and the inductive reactive demand, comprehensively considers the voltage fluctuation and the inductive reactive shortage, and reasonably controls the inductive reactive input so as to meet the reactive power supply and demand balance of a power grid; meanwhile, the protective circuit has the protective functions of over-voltage and under-voltage, over-current, quick-break and the like, and a complete branch protective system is formed by protecting the CT and the lightning arrester;

3. the utility model discloses overall structure compactness, intelligent sampling, policy control, compensation are accurate, installation and debugging are simple.

Drawings

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

FIG. 2 is a schematic view of the external structure of the present invention;

fig. 3 is a schematic view of the internal side structure of the middle inductance compensation cabinet of the present invention;

fig. 4 is a schematic diagram of the connection with the external user equipment according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, in this document, 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 comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Referring to fig. 1-4, embodiments of the present invention are detailed.

A cabinet type high-voltage automatic inductance compensation device is shown in figures 1-3 and comprises an incoming line cabinet 1 and a plurality of inductance compensation cabinets 7, wherein the incoming line cabinet 1 and the plurality of inductance compensation cabinets 7 adopt a building block type splicing structure to form a plurality of groups of equal-capacitance or unequal-capacitance branches to realize multi-level capacitance adjustment. The whole set of cabinet body adopts cordwood system mosaic structure, can not only realize multistage accent appearance, and the special design that the complete set cabinet body adopted cordwood system mosaic structure has increased the commonality of the cabinet body moreover, makes the assembly of product once accomplish in the factory, reduces on-the-spot installation work load, improves the productivity effect greatly, reduces on-the-spot installation debugging time, improves the operational reliability of product.

The incoming line cabinet 1 and the plurality of inductance compensation cabinets 7 are connected through the hard bus copper bars, and installation and maintenance are convenient.

The utility model discloses a cabinet for incoming lines, including incoming line cabinet 1, switch 3, incoming line side are equipped with the sensor, incoming line cable 2 and switch 3 electric connection once are equipped with below in the incoming line cabinet 1, the inside top of incoming line cabinet 1 is equipped with switch 3, switch 3. The intelligent high-voltage intelligent control system is characterized in that an inlet cabinet secondary chamber is arranged on the upper portion of the inlet cabinet 1, a high-voltage intelligent controller 5 (including protection) is arranged in the inlet cabinet secondary chamber, and the intelligent high-voltage intelligent controller 5 is covered on an intelligent judgment system operation mode. The high-voltage intelligent controller 5 has the functions of double main transformers, double buses and bus-bar connection sampling, can intelligently identify the voltage at the low-voltage side of the double main transformers, the bus-bar connection position, the power factor and the inductive reactive power demand, comprehensively considers the voltage fluctuation and the inductive reactive power shortage, and reasonably controls the inductive reactive power input so as to meet the reactive power supply and demand balance of a power grid; meanwhile, the protection functions of overvoltage and undervoltage, overcurrent, quick break and the like (the input of the on-switch reactor and the input of the blocking reactor are cut off) are achieved.

Every be equipped with protection CT8 above the inductance compensation cabinet 7 is inside, be equipped with lightning rod 9 and fling-cut switch 11 in the middle of inductance compensation cabinet 7 is inside, inductance compensation cabinet 7 is inside to be equipped with reactor 10 below.

The protection CT8, the fling-cut switch 11 and the reactor 10 are connected in series through a hard bus bar, the lightning rod 9, the fling-cut switch 11 and the reactor 10 are connected in a soft mode through copper wires, and the fling-cut switch 11, the protection CT8 and the high-voltage intelligent controller 5 are connected through the hard bus bar. The switching switch 11 can meet the inductive load switching. The protection CT8, the lightning arrester 9 and the high-voltage intelligent controller 5 form a complete branch protection system.

Still be equipped with voltmeter 4 and electrified demonstration 6 in the inlet wire cabinet secondary chamber of inlet wire cabinet 1, voltmeter 4 is used for showing busbar voltage in real time, and high-voltage intelligent control ware 5 realizes intelligent control, and electrified demonstration 6 shows that the inlet wire side is electrified or not. A compensation cabinet secondary chamber is arranged at the upper part of each inductance compensation cabinet 7, a manual/automatic change-over switch 12, an ammeter 13 and a switching-on/off button 14 are arranged in each compensation cabinet secondary chamber, and the manual/automatic change-over switch 12 realizes reactive manual/automatic change-over, can be operated automatically and manually, and is flexible in operation, simple in control, safe and reliable; the ammeter 13 shows each branch current.

Every be equipped with light 15, electromagnetic lock 16 and travel switch on inductance compensation cabinet 7's the cabinet door, light 15 conveniently overhauls, and electromagnetic lock 16 and travel switch realize the electric five-prevention shutting condition.

The incoming cabinet 1 is provided with an RS232 or RS485 serial communication interface, real-time data can be transmitted into the integrated automation system of the intelligent substation through the communication interface, and the requirements of various operation management modes such as unattended or unattended operation, centralized control and the like of the intelligent substation are met.

The cabinet body front and back of inlet wire cabinet 1 and inductance compensation cabinet 7 all opens the door, and cabinet body top, end, both sides shrouding are fixed, be equipped with the ventilation cooling window on the cabinet body. And hoisting rings 17 are arranged at the upper parts of the incoming line cabinet 1 and the inductance compensation cabinet 7.

The utility model discloses a wiring structure embodiment: the primary wiring is as shown in fig. 4, the double main transformers are incoming lines 1#, 2# main transformers, the double buses supply I section buses and II section buses, 1 set of the automatic inductance compensation device is installed on the I section buses, the device is divided into a plurality of groups of equal-capacitance or unequal-capacitance branches to provide inductive reactive power for the I section buses and the II section buses, the inductive reactive power requirement is realized through the high-voltage intelligent controller 5, control and protection are performed, and the switching states of 1#, 2# main transformer low-voltage side current signals, I, II section buses 1PT, 2PT voltage signals, low-voltage bus-coupler position signals and multi-branch special switching switches can be acquired in real time. The specific control method comprises the following steps: 1# and 2# main transformer low-voltage side current Ic sampling signals are input into a high-voltage intelligent controller, I, II section bus 1PT and 2PT voltage Uab sampling signals are input into a high-voltage intelligent controller 5, a low-voltage bus-coupler position signal is input into the high-voltage intelligent controller 5, and the switching state of a multi-branch switching switch is input into the high-voltage intelligent controller 5; the high-voltage intelligent controller 5 can intelligently identify the system operation mode through fuzzy calculation, takes the voltage, the power factor and the reactive power demand of the low-voltage side of a main transformer as control targets, comprehensively considers voltage fluctuation and inductive reactive power shortage, and reasonably controls reactive power input to meet the reactive power supply and demand balance of a power grid. Moreover, the high-voltage intelligent controller 5 has perfect protection functions: and protection such as overvoltage and undervoltage, overcurrent and quick disconnection.

The utility model discloses overall structure compactness, intelligent sampling, policy control, compensation are accurate, installation and debugging are simple.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A cabinet type high-voltage automatic inductance compensation device is characterized in that: the system comprises an incoming line cabinet (1) and a plurality of inductance compensation cabinets (7), wherein the incoming line cabinet (1) and the plurality of inductance compensation cabinets (7) are spliced into a plurality of groups of equal-capacitance or unequal-capacitance branches by adopting a building block type to realize multi-level capacitance regulation; a primary incoming cable (2) is arranged below the interior of the incoming cabinet (1), a disconnecting link (3) is arranged above the interior of the incoming cabinet (1), the primary incoming cable (2) is electrically connected with the disconnecting link (3), an incoming cabinet secondary chamber is arranged at the upper part of the incoming cabinet (1), and a high-voltage intelligent controller (5) is arranged in the incoming cabinet secondary chamber; every inductance compensation cabinet (7) inside top is equipped with protection CT (8), be equipped with lightning rod (9) and on-off switch (11) in the middle of inductance compensation cabinet (7) is inside, inductance compensation cabinet (7) inside below is equipped with reactor (10), protection CT (8), on-off switch (11) and reactor (10) electric series, lightning rod (9) and on-off switch (11) and reactor (10) electric connection, on-off switch (11) and protection CT (8) and high-voltage intelligent control ware (5) electric connection.

2. The cabinet type high-voltage automatic inductance compensation device according to claim 1, wherein: protection CT (8), fling-cut switch (11), reactor (10) are concatenated through the hard female row between, fling-cut switch (11) and protection CT (8) are connected through the hard female row with high-voltage intelligent control ware (5) between, through copper line flexible coupling between lightning rod (9) and fling-cut switch (11) and reactor (10).

3. The cabinet type high-voltage automatic inductance compensation device according to claim 1 or 2, wherein: and a voltmeter (4) and an electrified display (6) are also arranged in the secondary chamber of the inlet cabinet in the inlet cabinet (1).

4. The cabinet type high-voltage automatic inductance compensation device according to claim 3, wherein: and a sensor is arranged on the wire inlet side of the disconnecting link (3).

5. The cabinet type high-voltage automatic inductance compensation device according to claim 4, wherein: and an RS232 or RS485 serial communication interface is arranged on the incoming line cabinet (1).

6. The automatic inductance compensation device of claim 1 or 2, wherein: and a compensation cabinet secondary chamber is arranged at the upper part of each inductance compensation cabinet (7), and a manual/automatic change-over switch (12), an ammeter (13) and a switching-on/off button (14) are arranged in each compensation cabinet secondary chamber.

7. The cabinet type high-voltage automatic inductance compensation device according to claim 6, wherein: and a lighting lamp (15), an electromagnetic lock (16) and a travel switch are arranged on the cabinet door of each inductance compensation cabinet (7).

8. The cabinet type high-voltage automatic inductance compensation device according to claim 1, wherein: the incoming line cabinet (1) and the plurality of inductance compensation cabinets (7) are connected through the hard bus copper bars.

9. The cabinet type high-voltage automatic inductance compensation device according to claim 8, wherein: the front and the back of the cabinet body of the incoming line cabinet (1) and the inductance compensation cabinet (7) are both opened, the top, the bottom and the two side sealing plates of the cabinet body are fixed, and the cabinet body is provided with a ventilation and heat dissipation window.

10. The cabinet type high-voltage automatic inductance compensation device according to claim 9, wherein: and hoisting rings (17) are arranged at the upper parts of the incoming line cabinet (1) and the inductance compensation cabinet (7).