CN212849870U

CN212849870U - High-pass high-voltage passive power filter device

Info

Publication number: CN212849870U
Application number: CN202021582504.6U
Authority: CN
Inventors: 张建清; 孙鹏; 张昕; 李建华; 宋金凯; 高海鹏
Original assignee: Beijing Sifang Project Co ltd; Beijing Sifang Automation Co Ltd; Baoding Sifangsanyi Electric Co ltd
Current assignee: Beijing Sifang Project Co ltd; Beijing Sifang Automation Co Ltd; Baoding Sifangsanyi Electric Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-03-30
Anticipated expiration: 2030-08-03

Abstract

The utility model discloses a high-pass high-voltage passive power filter device, including cable holder subassembly, isolator subassembly, current transformer subassembly, reactor subassembly, capacitor pack, control terminal case, arrester subassembly, rail subassembly, neutral point current transformer subassembly or discharge coil subassembly. The utility model discloses diversified commonality is considered to carry out the modularized design with corresponding subassembly, reduced design cost and manufacturing cost, device package assembly is simple, safe and reliable, mutual commonality are strong, and are applicable to the protection mode of multiple capacitor bank.

Description

High-pass high-voltage passive power filter device

Technical Field

The utility model relates to a filtering and reactive compensation technical field, more specifically the high-pressure passive power filter integrated equipment who relates to a high versatility that says so is applicable to new energy fields such as wind-powered electricity generation field, photovoltaic.

Background

The wind energy belongs to renewable clean energy, has large reserve and wide distribution, and can be developed and utilized as an important energy source. And the cost of utilizing wind to generate electricity has been reduced considerably, even without additional external costs, using wind power at many suitable locations has been less costly than fuel-fired internal combustion engines. The annual rate of increase in wind power generation was about 25% in 2002, and now rapidly grows at a rate of 38%. In 2015, the wind power in China is super-nuclear power and becomes the third main power source.

In China, the main transformer of a wind power plant boosting transformer substation generally has the capacity of 50MVA (100MVA or more), the voltage is generally 110/35kV, the capacities are respectively 50(100)/MVA, and filtering and reactive compensation devices generally adopt SVG + FC type filtering compensation complete equipment. According to national grid regulations: the power factor of the grid connection of the wind power plant must reach more than 0.90, and the voltage deviation of a 110kV line is between-3% and + 7%. According to the requirement of low voltage ride through of the wind driven generator, when the grid voltage drops due to the fault of the power system, the wind driven generator is required to be operated without being disconnected from the grid under the specified condition, and meanwhile, the filtering and reactive power compensation device has the capability of providing the specified dynamic reactive power support.

But the existing filtering and reactive power compensation device has the defects of poor arrangement and structure universality and rationality, complex overall structure and the like.

Therefore, how to provide a high-voltage passive power filtering complete device with high versatility is a problem that needs to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a high-pass high-voltage passive power filter device has promoted the rationality and the commonality of equipment overall arrangement, and the structure interchangeability of the different projects of being convenient for has reduced overall structure complexity simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a high-pass high-voltage passive power filter device, comprising: the primary incoming line is connected with the isolating switch assembly through the cable support assembly, and the isolating switch assembly, the current transformer assembly, the reactor assembly and the capacitor assembly are sequentially connected through conducting wires; and the secondary wire of the isolating switch assembly and the secondary wire of the current transformer assembly are both connected into the control terminal box.

Further, still include the arrester subassembly, the arrester subassembly with capacitor assembly inlet wire end is connected.

The neutral point current transformer assembly is connected with the middle point of the double star-shaped wiring.

The discharging coil assembly is connected with the single star-shaped connection wire, the inlet end of the capacitor assembly and the middle point of the single-phase capacitor in series connection respectively.

Further, still include the rail subassembly, the net door electromagnetic lock and the net door travel switch of rail subassembly are connected to through the control line in the control terminal box.

Further, the current transformer component comprises a phase A current, a phase B current and a phase C current, the phase A current and the phase C current are connected with the isolating switch component, and the phase B current is connected with the reactor component.

According to the technical scheme, compare with prior art, the utility model discloses a high-pass high-voltage passive power filter device, device package assembly simple structure, safe and reliable, mutual commonality are strong to be applicable to the protection mode of multiple capacitor bank.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a sectional view of a dual star connection structure according to example 1.

FIG. 2 is a sectional view of a single star connection structure according to example 2.

Wherein the content of the first and second substances,

1. the cable support subassembly, 2, isolator subassembly, 3, current transformer subassembly, 4, reactor subassembly, 5, capacitor subassembly, 6, control terminal box, 7, arrester subassembly, 8, neutral point current transformer subassembly, 9, discharge coil subassembly, 10, rail subassembly.

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.

Embodiment 1, as shown in fig. 1, a high-pass high-voltage passive power filter device includes a cable bearer assembly 1, a disconnector assembly 2, a current transformer assembly 3, a reactor assembly 4, a capacitor assembly 5, a control terminal box 6, a lightning arrester assembly 7, a neutral point current transformer assembly 8, and a fence assembly 10.

A primary part: firstly, a primary incoming wire is connected to an isolating switch component 2 through a cable bracket component 1, the isolating switch component 2 is connected to the phase A current and the phase C current of a current transformer component 3 through a steel-cored aluminum stranded wire, the phase B current is connected to an air-core reactor, the air-core reactor is connected to the wire inlet end of a capacitor component 5, a lightning arrester component 7 is arranged between the air-core reactor and the capacitor component 5, and the lightning arrester component 7 is connected to the wire inlet end of the capacitor component 5; the outgoing line end of the capacitor component 5 finally forms a double star-shaped wiring according to different parallel and series connection modes of capacitors, and a neutral point current transformer component 8 is connected between the double star-shaped wiring.

A secondary part: the secondary and isolation switch assemblies 2 and 10 of the current transformer assembly 3 and the neutral point current transformer assembly 8 comprise a fence, a net door electromagnetic lock and a net door travel switch, and the secondary of the net door electromagnetic lock and the net door travel switch is led to the control terminal box 6 so as to be connected and controlled externally.

Wherein, the function of main electrical components does: the isolating switch component 2 is used for obvious breaking points of equipment maintenance and safe grounding; the current transformer assembly 3 is used for sampling current signals; the reactor component 4 is used for LC resonance and smoothing; the lightning arrester component 7 is used for overvoltage protection of switching operation of the capacitor bank; the capacitor component 5 is used for LC resonance and providing capacitive reactive power; the neutral point current transformer assembly 8 is used for protection, sampling and the like of unbalanced current, and the fence assembly 10 is used for five-prevention protection.

Embodiment 2, as shown in fig. 2, a high-pass high-voltage passive power filter device includes a cable holder assembly 1, a disconnector assembly 2, a current transformer assembly 3, a reactor assembly 4, a capacitor assembly 5, a control terminal box 6, a lightning arrester assembly 7, a discharge coil assembly 9, and a fence assembly 10.

A primary part: connecting a primary incoming wire to an isolating switch component 2 through a cable bracket component 1, connecting the isolating switch component 2 to the phase A current and the phase C current of a current transformer component 3 through a steel-cored aluminum stranded wire, connecting the phase B current to an air-core reactor, connecting the air-core reactor to the incoming wire end of a capacitor component 5, arranging an arrester component 7 between the air-core reactor and the capacitor group, and connecting the arrester component 7 to the incoming wire end of the capacitor component 5; the outlet end of the capacitor component 5 finally forms a single star-shaped connection line according to different capacitor parallel and series connection modes, and the single star-shaped connection line, the inlet end of the capacitor component and the single-phase capacitor series connection intermediate point are all connected with the discharging coil component 9.

A secondary part: the secondary of the current transformer assembly 3 and the discharge coil assembly 9 inside the device and the secondary of the net door electromagnetic lock and the net door travel switch in the isolating switch assembly 2 and the fence assembly 10 are led to the control terminal box 6 so as to facilitate external connection and control.

The functions of the main electrical components are the same as those of embodiment 1, and the discharge coil component 9 is used for discharging after the capacitor component is powered off and sampling phase voltage differential protection.

The utility model discloses following technological effect has:

1. according to the national standard and the industrial standard, the maintenance convenience and the magnetic field interference are fully considered, and the design is carried out according to factors such as landform, environment, altitude, pollution level and the like of a wind power plant area, so that the structure versatility is improved, the complexity is reduced, the use difficulty of a user is reduced, and the production assembly and later-stage operation maintenance efficiency and cost are improved.

2. Adding a secondary indoor or outdoor control terminal box; the inner parts of the isolating switch and the control terminal box are respectively gathered at the first time and the second time, so that a demarcation point is defined, and the convenience of field construction is improved;

3. the different wiring modes of the capacitor bank are enriched, and the wiring modes of double star type and single star type of the primary capacitor bank are met.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-pass high-voltage passive power filter device, comprising: the device comprises a cable support assembly (1), an isolating switch assembly (2), a current transformer assembly (3), a reactor assembly (4), a capacitor assembly (5) and a control terminal box (6), wherein one-time incoming line is connected with the isolating switch assembly (2) through the cable support assembly (1), and the isolating switch assembly (2), the current transformer assembly (3), the reactor assembly (4) and the capacitor assembly (5) are sequentially connected through conducting wires; and the secondary line of the isolating switch assembly (2) and the secondary line of the current transformer assembly (3) are connected into the control terminal box (6).

2. The high-usability high-voltage passive power filter device according to claim 1, further comprising an arrester assembly (7), wherein the arrester assembly (7) is connected with a line inlet end of the capacitor assembly (5).

3. The high-usability high-voltage passive power filter device according to claim 2, further comprising a neutral point current transformer assembly (8), wherein the capacitor assembly (5) outlet terminals form a double star-shaped connection in parallel and series connection according to capacitors, and the neutral point current transformer assembly (8) is connected to the middle point of the double star-shaped connection.

4. The high-pass high-voltage passive power filter device as claimed in claim 2, further comprising a discharge coil assembly (9), wherein the outlet terminal of the capacitor assembly (5) forms a single star connection in parallel and series connection according to capacitors, and the discharge coil assembly (9) is respectively connected with the single star connection, the inlet terminal of the capacitor assembly (5) and the middle point of the single-phase capacitor series connection.

5. The high-usability high-voltage passive power filter device according to claim 3 or 4, further comprising a fence assembly (10), wherein the gate electromagnetic lock and the gate travel switch of the fence assembly (10) are connected into the control terminal box (6) through control lines.

6. The high-versatility high-voltage passive power filter device according to claim 5, wherein said current transformer assembly (3) comprises a phase A current, a phase B current and a phase C current, and said phase A current and said phase C current are connected to said isolating switch assembly (2), and said phase B current is connected to said reactor assembly (4).