Medium-voltage reactive compensation filtering complete equipment

Abstract

The utility model relates to the technical field of filtering cabinets, and provides a medium-voltage reactive compensation filtering complete device, which comprises an isolation cabinet and a compensation filtering cabinet group, the isolation cabinet is fixedly connected with the compensation filtering cabinet group, and the compensation filtering cabinet group comprises at least one group of compensation filtering cabinets. The compensation filter cabinet comprises a parallel capacitor, a series filter reactor, a vacuum contactor special for a switched capacitor, a discharge coil, a capacitor protection fuse, a zinc oxide arrester, a current transformer and an instrument control room, and the series filter reactor, the discharge coil, the current transformer and the vacuum contactor special for the switched capacitor are connected in series. The parallel capacitor, the capacitor protection fuse and the zinc oxide lightning arrester are arranged in the series circuit in parallel, and the instrument control room is connected with the current transformer, the switching capacitor special-purpose vacuum contactor and the discharge coil through a secondary line. And the uncertainty in the design and construction process can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filter cabinets, in particular to a medium-voltage reactive power compensation filter complete set device. Background Art

[0002] Suppressing harmonics and improving power factor is a major issue involving power electronics, electrical automation and power systems. With the continuous advancement of power electronics, new active harmonic suppression technology and reactive power compensation technology have developed rapidly.

[0003] As disclosed in application number: CN202223477932.4, the low-voltage dynamic hybrid compensation filter cabinet includes a low-voltage filtering mechanism, which includes a cabinet body, a power distribution system is fixedly installed on the top of the cabinet body, the lower side of the power distribution system is electrically connected to a first circuit, the lower side bolts of the first circuit are electrically connected to a power control switch, the lower side bolts of the power control switch are electrically connected to a second circuit, and the lower side of the second circuit is electrically connected to a contactor.

[0004] However, the existing equipment is less standardized, which increases uncertainty in the design and construction process, resulting in time delays and increased costs due to individual differences in the design and installation process. In addition, due to changes in the scale of the environment, redesign and construction are required when capacity is expanded, which increases production costs and reduces corporate benefits. Utility Model Content

[0005] In order to solve the above problem, the utility model provides a medium voltage reactive power compensation filter device to solve the problem.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A medium voltage reactive power compensation filter complete set comprises: an isolation cabinet and a compensation filter cabinet group, wherein the isolation cabinet is fixedly connected to the compensation filter cabinet group, and the compensation filter cabinet group comprises at least one group of compensation filter cabinets.

[0008] Preferably, the compensating filter cabinet includes: a parallel capacitor, a series filter reactor, a special vacuum contactor for switching capacitors, a discharge coil, a capacitor protection fuse, a zinc oxide lightning arrester, a current transformer and an instrument control room. The series filter reactor, the discharge coil, the current transformer and the special vacuum contactor for switching capacitors are connected in series, and the parallel capacitor, the capacitor protection fuse and the zinc oxide lightning arrester are arranged in parallel in the above-mentioned series circuit. The instrument control room is connected to the current transformer, the special vacuum contactor for switching capacitors and the discharge coil through a secondary line.

[0009] Preferably, the isolation cabinet comprises: an isolation switch and a first electromagnetic lock, wherein the first electromagnetic lock is installed at the operating end of the isolation switch, the isolation switch is installed on the front panel of the isolation cabinet, and the wiring terminals of the isolation switch are connected to the circuit.

[0010] Preferably, lifting rings are provided on the upper surfaces of the isolation cabinet and the compensation filter cabinet.

[0011] Preferably, the compensation filter cabinet also includes a combination panel, which includes: a control panel, a lock plate, a first sealing plate and a second sealing plate. The control panel is arranged on the front side of the instrument control room, the lock plate is arranged on the lower side of the control panel, the first sealing plate is arranged on one side of the control panel, and the second sealing plate is arranged on one side of the lock plate. The lock plate is fixedly connected to the compensation filter cabinet through a second electromagnetic lock.

[0012] The advantages of the utility model are: the utility model can reduce the uncertainty in the design and construction process and improve work efficiency through the standardized configuration of the isolation cabinet and the compensation filter cabinet combination. The standardized design and installation process can reduce the time delay and cost increase caused by individual differences. The standardized configuration can also adapt to the changes in scale more flexibly, without the need for large-scale redesign and construction, reducing production and manufacturing costs and improving corporate benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0014] Figure 1 It is a structural axonometric diagram of the utility model;

[0015] Figure 2 It is the front view of the utility model;

[0016] Figure 3 It is the structural axial view of the compensation filter cabinet of the utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of the compensation filter cabinet of the utility model;

[0018] Figure 5 This is the main view of the compensation filter cabinet of the utility model;

[0019] Figure 6 This is the front view of the isolation cabinet of the utility model;

[0020] Figure 7 It is a schematic diagram of the internal structure of the main view of the utility model.

[0021] Description of reference numerals:

[0022] 1. Isolation cabinet; 2. Compensation filter cabinet group; 3. Compensation filter cabinet; 31. Shunt capacitor; 32. Series filter reactor; 33. Vacuum contactor for switching capacitor; 34. Discharge coil; 35. Capacitor protection fuse; 36. Zinc oxide lightning arrester; 37. Current transformer; 38. Instrument control room; 11. Isolation switch; 12. First electromagnetic lock; 4. Lifting ring; 5. Combination panel; 51. Control panel; 52. Lock plate; 53. First sealing plate; 54. Second sealing plate; 55. Second electromagnetic lock. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] Embodiment 1, combined with Figure 1 and Figure 2 To explain:

[0027] The medium voltage reactive power compensation filter complete set comprises: an isolation cabinet 1 and a compensation filter cabinet group 2. The isolation cabinet 1 is fixedly connected to the compensation filter cabinet group 2. The compensation filter cabinet group 2 comprises at least one group of compensation filter cabinets 3.

[0028] Through reactive power compensation, the complete set of equipment can effectively improve the power factor of the system, reduce the loss of reactive power, and thus improve the energy utilization efficiency of the entire power system. The filtering part in the device can filter out the harmonics in the power grid, reduce the distortion of voltage and current, and ensure that the power system operates in a more stable and high-quality power environment. Through compensation filtering, the device helps to stabilize the grid voltage, reduce voltage fluctuations and flicker, and ensure the reliability of power supply. By setting up the compensation filter cabinet group 2, it can be designed and adjusted according to the specific needs of the user, and is easy to expand and upgrade to adapt to future scale expansion.

[0029] Embodiment 2, based on embodiment 1, combined with Figure 3 , Figure 4 and Figure 5 To explain:

[0030] The compensation filter cabinet 3 includes: a parallel capacitor 31, a series filter reactor 32, a special vacuum contactor 33 for switching capacitors, a discharge coil 34, a capacitor protection fuse 35, a zinc oxide lightning arrester 36, a current transformer 37 and an instrument control room 38. The series filter reactor 32, the discharge coil 34, the current transformer 37 and the special vacuum contactor 33 for switching capacitors are connected in series, the parallel capacitor 31, the capacitor protection fuse 35 and the zinc oxide lightning arrester 36 are arranged in parallel in the above-mentioned series circuit, and the instrument control room 38 is connected to the current transformer 37, the special vacuum contactor 33 for switching capacitors and the discharge coil 34 through a secondary line.

[0031] The parallel capacitor 31 is used to provide reactive power compensation, improve the power factor of the system, reduce reactive power loss, and improve the power supply efficiency of the power grid. The series filter reactor 32 and the discharge coil 34 work together to filter out the harmonics in the power grid, reduce the impact of harmonics on the system, and protect the equipment from harmonic damage. The vacuum contactor 33 dedicated to the switching capacitor is used to quickly put in or cut off the capacitor bank to facilitate dynamic compensation of reactive power and adapt to changes in the power grid load. The capacitor protection fuse 35 is used to quickly cut off the circuit when a capacitor fails, prevent the fault from expanding, and protect the safe operation of the system. The zinc oxide lightning arrester 36 is used to protect the equipment from overvoltage damage. The current transformer 37 is used to monitor the change of current and provide feedback signals for the control system. The instrument control room 38 contains monitoring and control equipment for the entire compensation filter cabinet to ensure the stable operation of the system. Through parallel and series connection, the compensation filter cabinet can be flexibly configured according to the specific needs and load characteristics of the power grid to achieve the best compensation effect. The integrated design makes maintenance and troubleshooting more convenient and reduces operation and maintenance costs.

[0032] Embodiment 3, based on embodiment 2, combined with Figure 6 and Figure 7 To explain:

[0033] The isolation cabinet 1 includes: an isolation switch 11 and a first electromagnetic lock 12, wherein the first electromagnetic lock 12 is installed at the operating end of the isolation switch 11, the isolation switch 11 is installed on the front panel of the isolation cabinet 1, and the wiring terminal of the isolation switch 11 is connected to the circuit. The isolation switch 11 can isolate the compensation filter cabinet group 2 from the power supply system to prevent accidental electric shock accidents during maintenance or fault handling. The first electromagnetic lock 12 is installed at the operating end of the isolation switch 11, which can lock the switch position to prevent misoperation. When maintenance or overhaul is required, the electromagnetic lock can be unlocked, making the operation more convenient. When a fault occurs or an emergency shutdown is required, the power supply can be quickly cut off through the isolation cabinet to reduce the spread of the fault and the loss. Through the use of the isolation cabinet 1, the reliability of the entire power system can be improved, because it can quickly isolate the fault point when a problem occurs, reducing the impact on the entire system. When maintenance or overhaul is required, the isolation cabinet can quickly cut off the power supply, thereby reducing the downtime of the system and improving production efficiency.

[0034] Embodiment 4, based on embodiment 3, combined with Figure 5 and Figure 6 To explain:

[0035] The upper surfaces of the isolation cabinet 1 and the compensation filter cabinet 3 are provided with lifting rings 4. Such arrangement facilitates the assembly and disassembly of the isolation cabinet 1 and the compensation filter cabinet 3 through the lifting rings 4.

[0036] Embodiment 5, based on embodiment 2, combined with Figure 5 To explain:

[0037] The compensation filter cabinet 3 also includes a combination panel 5, which includes: a control panel 51, a lock plate 52, a first sealing plate 53 and a second sealing plate 54. The control panel 51 is arranged at the front side of the instrument control room 38, the lock plate 52 is arranged at the lower side of the control panel 51, the first sealing plate 53 is arranged at one side of the control panel 51, and the second sealing plate 54 is arranged at one side of the lock plate 52. The lock plate 52 is fixedly connected to the compensation filter cabinet 3 through a second electromagnetic lock 55. The control panel 51 is located at the front side of the instrument control room 38, which is convenient for operators to centrally monitor and operate various functions of the compensation filter cabinet. The lock plate 52 is fixedly connected to the compensation filter cabinet 3 through the second electromagnetic lock 55, and the lock plate 52 can be locked to prevent unauthorized personnel from misoperating or electric shock. By using the first sealing plate 53 and the second sealing plate 54, the installation strength of the control panel 51 and the lock plate 52 can be improved.

[0038] Working principle of the utility model: The utility model is mainly used for reactive power compensation and harmonic suppression of 6KV, 10KV, 35KV and other power systems, improves power factor, improves power quality, reduces line loss, and improves power transmission and distribution efficiency. It includes a group of isolation cabinets 1, with isolating switches 11, first electromagnetic locks 12 and other devices installed inside to realize the connection between the compensation device and the upper-level incoming line cabinet; it includes several compensation filter cabinets 3, with parallel capacitors 31, series filter reactors 32, special vacuum contactors 33 for switching capacitors, discharge coils 34, capacitor protection fuses 35, zinc oxide lightning arresters 36, current transformers 37 and instrument control rooms 38 installed inside to realize reactive power compensation and harmonic suppression of the power system. It adopts the form of standard isolation cabinets 1 and compensation filter cabinets 3, and the use of standardized solutions makes capacity expansion more convenient.

[0039] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A medium voltage reactive power compensation filter complete set, characterized in that: include: An isolation cabinet (1) and a compensation filter cabinet group (2), wherein the isolation cabinet (1) is fixedly connected to the compensation filter cabinet group (2), wherein the compensation filter cabinet group (2) comprises at least one group of compensation filter cabinets (3); the compensation filter cabinet (3) comprises: a shunt capacitor (31), a series filter reactor (32), a special vacuum contactor for switching capacitors (33), a discharge coil (34), a capacitor protection fuse (35), a zinc oxide lightning arrester (36), a current transformer (37) and an instrument control room (38), wherein the series filter reactor (32), the discharge coil (34), the current transformer (37) and the special vacuum contactor for switching capacitors (33) are connected in series. The isolating cabinet (1) is connected in parallel with the series filter reactor (32), the capacitor protection fuse (35) and the zinc oxide lightning arrester (36) are respectively connected in parallel with the current transformer (37), and the instrument control room (38) is connected to the current transformer (37), the vacuum contactor (33) dedicated for switching capacitors, and the discharge coil (34) through a secondary line; the isolating cabinet (1) comprises: an isolating switch (11) and a first electromagnetic lock (12), the first electromagnetic lock (12) is installed at the operating end of the isolating switch (11), the isolating switch (11) is installed on the front panel of the isolating cabinet (1), and the wiring terminal of the isolating switch (11) is connected to the circuit.

2. The medium voltage reactive power compensation filter set according to claim 1 is characterized in that: Lifting rings (4) are provided on the upper surfaces of the isolation cabinet (1) and the compensation filter cabinet (3).

3. The medium voltage reactive power compensation filter set according to claim 1 is characterized in that: The compensation filter cabinet (3) further comprises a combination panel (5), wherein the combination panel (5) comprises: a control panel (51), a lock plate (52), a first sealing plate (53) and a second sealing plate (54); the control panel (51) is arranged at the front side of the instrument control room (38); the lock plate (52) is arranged at the lower side of the control panel (51); the first sealing plate (53) is arranged at one side of the control panel (51); the second sealing plate (54) is arranged at one side of the lock plate (52); and the lock plate (52) is fixedly connected to the compensation filter cabinet (3) via a second electromagnetic lock (55).

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