CN209217698U - Inhibit the apparatus and system of transformer dc - Google Patents

Abstract

The utility model provides a kind of apparatus and system for inhibiting transformer dc, and the device of the inhibition transformer dc includes polypropylene film self healing capacitor and graphite nodule gap.Polypropylene film self healing capacitor includes first end and second end.Graphite nodule gap is in parallel with polypropylene film self healing capacitor.Graphite nodule gap includes first end and second end.The first end of the first end connection graphite nodule gap of polypropylene film self healing capacitor.The second end of the second end connection graphite nodule gap of polypropylene film self healing capacitor.The utility model can be realized that structure is simple, central electron element link is few, feature small in size, compact-sized reliable for operation, convenient to install and use in various indoor and outdoor occasions.

Description

Inhibit the apparatus and system of transformer dc

Technical field

The utility model relates to electronic circuit technology fields, in particular to a kind of device for inhibiting transformer dc And system.

Background technique

Currently, with the development of extra-high voltage direct-current transmission technology, the extra-high voltage direct-current transmission route that puts into operation is more and more, extra-high Influence of the direct current transportation to AC system is pressed to be more and more obvious, one of them mainly influences to be in DC power transmission line monopole the earth When operation or two-phase off-center operation, it can be greatly used as an electric current return loop, it is logical some for DC current at this time The AC transformer for crossing neutral ground flows into AC system.After direct current flows into AC transformer, it is inclined that transformer can generate direct current Magnetic phenomenon influences the safe and stable operation of transformer.Power plant, substation near DC power transmission line earthing pole is different degrees of Ground receives the influence of D.C. magnetic biasing.

Utility model content

In view of the above problems, the utility model provides a kind of apparatus and system for inhibiting transformer dc, inhibits transformation The features such as device of device direct current has capacitive reactance small, and through-current capability is strong, can meet the dynamic current of high-power transformer neutral point It is required that.

To achieve the goals above, the utility model adopts the following technical solutions:

In a first aspect, the utility model provides a kind of device for inhibiting transformer dc, the inhibition transformer dc Device include:

Polypropylene film self healing capacitor, the polypropylene film self healing capacitor include first end and second end；

Graphite nodule gap, in parallel with the polypropylene film self healing capacitor, the graphite nodule gap includes first end and Two ends, the first end of the polypropylene film self healing capacitor connect the first end of the graphite nodule gap, and the polypropylene is thin The second end of film self healing capacitor connects the second end of the graphite nodule gap.

As an alternative embodiment, the device for inhibiting transformer dc further include:

Cabinet shell, the polypropylene film self healing capacitor and the graphite nodule gap are set to the cabinet shell The first end of inside, the first end of the polypropylene film self healing capacitor and the graphite nodule gap passes through the cabinet shell Side connector connect AC transformer, the second end of the polypropylene film self healing capacitor and the graphite nodule gap Second end connects ground by the other side connector of the cabinet shell.

As an alternative embodiment, the degree of protection of the cabinet shell is IP23, the material of the cabinet shell Matter uses stainless steel material.

As an alternative embodiment, after the graphite nodule gap is in parallel with the polypropylene film self healing capacitor Impedance be lower than 0.025 ohm, to maintain the duration of DC rated voltage in the first duration threshold value；The polypropylene is thin Film self healing capacitor is shell-type capacitor, to bear high surge current.

As an alternative embodiment, the device for inhibiting transformer dc further include:

First single-pole double-throw switch (SPDT), first single-pole double-throw switch (SPDT) include first end and second end；

Second single-pole double-throw switch (SPDT), second single-pole double-throw switch (SPDT) and the polypropylene film self healing capacitor and institute It states graphite nodule gap to connect, then in parallel with the first single-pole double-throw switch (SPDT) progress, the second single-pole double-throw switch (SPDT) packet First end and second end are included, the first end of second single-pole double-throw switch (SPDT) connects the first of first single-pole double-throw switch (SPDT) The second end at end, second single-pole double-throw switch (SPDT) connects the polypropylene film self healing capacitor and the graphite nodule gap, The second end of first single-pole double-throw switch (SPDT) is grounded.

Second aspect, the utility model provide a kind of system for inhibiting transformer dc, the inhibition transformer dc System include:

Polypropylene film self healing capacitor, the polypropylene film self healing capacitor include first end and second end；

Graphite nodule gap, in parallel with the polypropylene film self healing capacitor, the graphite nodule gap includes first end and Two ends, the first end of the polypropylene film self healing capacitor connect the first end of the graphite nodule gap, and the polypropylene is thin The second end of film self healing capacitor connects the second end of the graphite nodule gap；

Control module, the control module according to the voltage value or charge value of the polypropylene film self healing capacitor with The graphite nodule gap is opened or closed.

As an alternative embodiment, the device for inhibiting transformer dc further include:

Cabinet shell, the polypropylene film self healing capacitor and the graphite nodule gap are set to the cabinet shell The first end of inside, the first end of the polypropylene film self healing capacitor and the graphite nodule gap passes through the cabinet shell Side connector connect AC transformer, the second end of the polypropylene film self healing capacitor and the graphite nodule gap Second end connects ground by the other side connector of the cabinet shell.

As an alternative embodiment, the degree of protection of the cabinet shell is IP23, the material of the cabinet shell Matter uses stainless steel material.

As an alternative embodiment, after the graphite nodule gap is in parallel with the polypropylene film self healing capacitor Impedance be lower than 0.025 ohm, to maintain the duration of DC rated voltage in the first duration threshold value；The polypropylene is thin Film self healing capacitor is shell-type capacitor, to bear high surge current.

As an alternative embodiment, the device for inhibiting transformer dc further include:

First single-pole double-throw switch (SPDT), first single-pole double-throw switch (SPDT) include first end and second end；

Second single-pole double-throw switch (SPDT), second single-pole double-throw switch (SPDT) and the polypropylene film self healing capacitor and institute It states graphite nodule gap to connect, then in parallel with the first single-pole double-throw switch (SPDT) progress, the second single-pole double-throw switch (SPDT) packet First end and second end are included, the first end of second single-pole double-throw switch (SPDT) connects the first of first single-pole double-throw switch (SPDT) The second end at end, second single-pole double-throw switch (SPDT) connects the polypropylene film self healing capacitor and the graphite nodule gap, The second end of first single-pole double-throw switch (SPDT) is grounded.

A kind of device for inhibiting transformer dc, including polypropylene film self healing capacitor are provided according to the utility model And graphite nodule gap.Polypropylene film self healing capacitor includes first end and second end.Graphite nodule gap and polypropylene film self-healing Formula capacitor is in parallel.Graphite nodule gap includes first end and second end.The first end of polypropylene film self healing capacitor connects stone The first end of tampon gap.The second end of polypropylene film self healing capacitor connects the second of the first graphite nodule gap switch tool End.The utility model can be realized that structure is simple, central electron element link is few, reliable for operation small in size, compact-sized Feature, it is convenient to be installed and used in various indoor, outdoor occasions.In addition, the material of cabinet shell uses stainless steel material, beautiful outline form Sight, corrosion resistance are strong, degree of protection IP23.

To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and Cooperate appended attached drawing, is described in detail below.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to the scope of the utility model as.

Fig. 1 is the circuit diagram of the device for the inhibition transformer dc that the utility model embodiment 1 provides；

Fig. 2 is the circuit diagram of the device for the inhibition transformer dc that the utility model embodiment 1 provides；

Fig. 3 is the circuit diagram of the device for the inhibition transformer dc that the utility model embodiment 1 provides；

Fig. 4 is the circuit diagram of the system for the inhibition transformer dc that the utility model embodiment 2 provides.

Main element symbol description:

100,100a, 100b- inhibit the device of transformer dc；

C- polypropylene film self healing capacitor；

GP- graphite nodule gap；

The first single-pole double-throw switch (SPDT) of 1SW-；

The second single-pole double-throw switch (SPDT) of 2SW-；

110- cabinet shell；

120- AC transformer；

The system of 200- inhibition transformer dc；

230- control module.

Specific embodiment

Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities Apply example.

The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be matched with a variety of different It sets to arrange and design.Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to below The range of claimed invention is limited, but is merely representative of the selected embodiment of the utility model.It is practical based on this Novel embodiment, those skilled in the art's every other implementation obtained without making creative work Example, fall within the protection scope of the utility model.

It hereinafter, can the term " includes " used in the various embodiments of the utility model, " having " and its homologous Word is meant only to indicate special characteristic, number, step, operation, the combination of element, component or aforementioned item, and is understood not to The combined presence or increasing of one or more other features, number, step, operation, element, component or aforementioned item is excluded first A possibility that adding the combination of one or more features, number, step, operation, element, component or aforementioned item.

In the various embodiments of the utility model, statement " A or/and B " includes any combination of the text listed file names with Or all combinations, it may include A, may include B or may include A and B both.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term Stating may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be It can be combined in any suitable manner in any one or more embodiment or examples.

The power plant near DC power transmission line earthing pole, substation receive D.C. magnetic biasing to some extent in recent years It influences.Therefore, technical solution provided by the utility model has the characteristic of logical exchange, stopping direct current using self healing capacitor, will Its neutral point for being mounted on AC transformer inhibits transformer neutral point DC current, guarantees the operation of transformer normal table. Since transmission line of electricity can carry out charge and discharge to capacitor in failure, electric current at this time is very big to reach tens kilo-amperes, need in real time Monitor neutral point of main transformer capacitance operation state.

Embodiment 1

Fig. 1 is the circuit diagram of the device for the inhibition transformer dc that the utility model embodiment 1 provides.In Fig. 1 The device 100 for inhibiting transformer dc includes polypropylene film self healing capacitor C and graphite nodule gap GP.Polypropylene film is certainly More formula capacitor C is the capacitor that can restore automatically, and self healing capacitor uses polypropylene screen for medium, self healing capacitor One layer of thin metal has been deposited as conductive electrode in surface.When applying excessively high voltage in self healing capacitor, polypropylene screen is electric Weakness is breakdown, and breakdown point impedance is substantially reduced, and the current density flowed through increased dramatically, and makes the coating generation high fever that metallizes, hits It wears a metallic conductor for surrounding and evaporates loss rapidly, form blank area of metal coating, breakdown point restores to insulate automatically.Graphite nodule gap GP can be in high voltage, high current and operated at high frequencies, in other words, and with high pressure resistant high stream, inductance is small, resistance is small and high Continuous work under frequency.In general, the operating voltage of graphite nodule gap GP can be up to 10MV, and peak point current is up to 10³kA。

In one embodiment, polypropylene film self healing capacitor C includes first end and second end.Graphite nodule gap GP and poly- Polypropylene film self healing capacitor C is in parallel.Graphite nodule gap GP includes first end and second end.Polypropylene film self healing capacitor The first end of the first end connection graphite nodule gap GP of C.The second end of polypropylene film self healing capacitor C connects graphite nodule gap GP Second end.It can satisfy large capacity by the parallel-connection structure that graphite nodule gap GP and polypropylene film self healing capacitor C are formed to become The features such as dynamic current requirement of depressor neutral point, has capacitive reactance small, and anti-high current ability is strong, and can be in high-frequency and high-voltage Lower steady operation.

Fig. 2 is the circuit diagram of the device for the inhibition transformer dc that the utility model embodiment 1 provides.In Fig. 1 Inhibiting the device 100a of transformer dc includes polypropylene film self healing capacitor C, graphite nodule gap GP, 110 and of cabinet shell AC transformer 120.

Polypropylene film self healing capacitor C and graphite nodule gap GP is set to the inside of cabinet shell 110.Polypropylene film The first end of self healing capacitor C and the first end of graphite nodule gap GP connect exchange by the side connector of cabinet shell 110 Transformer 120.The second end of polypropylene film self healing capacitor C and the second end of graphite nodule gap GP pass through cabinet shell 110 Other side connector connect ground.In other words, the parallel-connection structure that polypropylene film self healing capacitor C and graphite nodule gap GP is formed One end AC transformer 120 is connected by the side connector of cabinet shell 110, receive the friendship that AC transformer 120 is sent Galvanic electricity；The other end for the parallel-connection structure that polypropylene film self healing capacitor C and graphite nodule gap GP is formed passes through cabinet shell 110 Other side connector connect ground.The device 100a of transformer dc is inhibited to have the characteristics that small in size, compact-sized, Ke Yifang Just it is installed and used in various indoor and outdoor occasions, improves Electrical Safety.

The degree of protection of cabinet shell 110 is IP23.The material of cabinet shell 110 uses stainless steel material.Further come It says, IP (INGRESS PROTECTION) degree of protection system is by IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION it) is defined, electric appliance is classified according to the characteristic of its dust-proof blocks moisture.IP degree of protection is by two digital institutes Composition, the grade that first digit indicates that electric appliance is dust-proof, prevents foreign object from invading, second digit indicate electric appliance blocks moisture, waterproof The tightness of immersion, number is bigger, and its degree of protection of expression is higher.The representative of first digit 2 prevents diameter to be greater than 12.5mm Solid foreign object intrusion.The water that second digit 3 represents rain-proof or prevents the direction with vertical angle less than 60 degree from being sprayed It invades electric appliance and damages.The stainless steel material corrosion resistance of cabinet shell 110 is strong.Cabinet shell 110 is opened using front and back Gate-type, polypropylene film self healing capacitor C and graphite nodule gap GP inside easy installation maintenance increase convenience.

In one embodiment, the impedance after graphite nodule gap GP is in parallel with polypropylene film self healing capacitor C is lower than 0.025 Ohm, to maintain the duration of DC rated voltage in the first duration threshold value, for example, inhibiting the device of transformer dc 100a can maintain the duration of 1.5 times of DC rated voltage in 10 seconds (being considered as the first duration threshold value), meet The standard of IEC61881 and GB/T17702-1999 (is tested the isolation experiment of capacitor, failure test, self-healing property and durable Property test).Polypropylene film self healing capacitor C protects the electricity of electronic component for shell-type capacitor to bear high surge current Property safety.

Fig. 3 is the circuit diagram of the device for the inhibition transformer dc that the utility model embodiment 1 provides.In Fig. 1 Inhibiting the device 100b of transformer dc includes that polypropylene film self healing capacitor C, graphite nodule gap GP, the first single-pole double throw are opened Close 1SW, the second single-pole double-throw switch (SPDT) 2SW, cabinet shell 110 and AC transformer 120.

Second single-pole double-throw switch (SPDT) 2SW connects with polypropylene film self healing capacitor C and graphite nodule gap GP, connects It is in parallel with the first single-pole double-throw switch (SPDT) 1SW.Second single-pole double-throw switch (SPDT) 2SW includes first end and second end.Second hilted broadsword is double The first end of throw switch 2SW connects the first end of the first single-pole double-throw switch (SPDT) 1SW.The second end of second single-pole double-throw switch (SPDT) 2SW Connect polypropylene film self healing capacitor C and graphite nodule gap GP.The second end of first single-pole double-throw switch (SPDT) 1SW is grounded.

Embodiment 2

It is the system for the inhibition transformer dc that the utility model embodiment 2 provides please refer to Fig. 3 and Fig. 4, Fig. 4 Circuit diagram.The system 200 of inhibition transformer dc in Fig. 4 includes polypropylene film self healing capacitor C, graphite nodule gap GP, the first single-pole double-throw switch (SPDT) 1SW, the second single-pole double-throw switch (SPDT) 2SW, cabinet shell 110, AC transformer 120 and control mould Block 230.Wherein, polypropylene film self healing capacitor C, graphite nodule gap GP, the first single-pole double-throw switch (SPDT) 1SW, the second hilted broadsword are double Throw switch 2SW, cabinet shell 110 and AC transformer 120 please refer to the explanation of embodiment 1, and details are not described herein.

For example, control module 230 can be according to the voltage value or charge value of polypropylene film self healing capacitor C with manual Graphite nodule gap GP is opened or closed in mode.

As it can be seen that a kind of device for inhibiting transformer dc provided by the utility model, including polypropylene film self-healing electricity Container and graphite nodule gap.Polypropylene film self healing capacitor includes first end and second end.Graphite nodule gap and polypropylene film Self healing capacitor is in parallel.Graphite nodule gap includes first end and second end.The first end of polypropylene film self healing capacitor connects Connect the first end of graphite nodule gap.The second end of the second end connection graphite nodule gap of polypropylene film self healing capacitor.This is practical It is novel to realize that structure is simple, central electron element link is few, feature small in size, compact-sized reliable for operation, it is convenient It is installed and used in various indoor, outdoor occasions.In addition, the material of cabinet shell uses stainless steel material, corrosion resistance is strong, protection Grade IP23, the electrically safety in effective cabinet shell.Polypropylene film self healing capacitor is shell-type capacitor, built-in electrical insulation Material is polypropylene film, and self-induction is small, there is multiple-layer metallization membrane type self-healing ability, to bear high surge current, effective protection dress It sets and the electrical property of system is safe.Inhibit the apparatus and system of transformer dc can be without other controls and relay protective scheme, scene fortune Row is reliable, maintenance is simple.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation Or replacement, it should be covered within the scope of the utility model.

Claims (10)

1. it is a kind of inhibit transformer dc device, which is characterized in that it is described inhibit transformer dc device include:

Polypropylene film self healing capacitor, the polypropylene film self healing capacitor include first end and second end；

Graphite nodule gap, in parallel with the polypropylene film self healing capacitor, the graphite nodule gap includes first end and second end, The first end of the polypropylene film self healing capacitor connects the first end of the graphite nodule gap, the polypropylene film self-healing The second end of formula capacitor connects the second end of the graphite nodule gap.

2. the device according to claim 1 for inhibiting transformer dc, which is characterized in that the inhibition transformer dc Device further include:

Cabinet shell, the polypropylene film self healing capacitor and the graphite nodule gap are set to the interior of the cabinet shell The first end of portion, the first end of the polypropylene film self healing capacitor and the graphite nodule gap passes through the cabinet shell Side connector connects AC transformer, and the of the second end of the polypropylene film self healing capacitor and the graphite nodule gap Two ends connect ground by the other side connector of the cabinet shell.

3. the device according to claim 2 for inhibiting transformer dc, which is characterized in that the protection etc. of the cabinet shell Grade is IP23, and the material of the cabinet shell uses stainless steel material.

4. the device according to claim 1 for inhibiting transformer dc, which is characterized in that the graphite nodule gap is gathered with described Impedance after Polypropylene film self healing capacitor is in parallel is lower than 0.025 ohm, to maintain the duration of DC rated voltage to exist In first duration threshold value；The polypropylene film self healing capacitor is shell-type capacitor, to bear high surge current.

5. the device according to claim 1 for inhibiting transformer dc, which is characterized in that the inhibition transformer dc Device further include:

First single-pole double-throw switch (SPDT), first single-pole double-throw switch (SPDT) include first end and second end；

Second single-pole double-throw switch (SPDT), second single-pole double-throw switch (SPDT) and the polypropylene film self healing capacitor and the stone Tampon gap is connected, then in parallel with the first single-pole double-throw switch (SPDT) progress, and second single-pole double-throw switch (SPDT) includes the One end and second end, the first end of second single-pole double-throw switch (SPDT) connect the first end of first single-pole double-throw switch (SPDT), institute The second end for stating the second single-pole double-throw switch (SPDT) connects the polypropylene film self healing capacitor and the graphite nodule gap, and described the The second end of one single-pole double-throw switch (SPDT) is grounded.

6. it is a kind of inhibit transformer dc system, which is characterized in that it is described inhibit transformer dc system include:

Polypropylene film self healing capacitor, the polypropylene film self healing capacitor include first end and second end；

Graphite nodule gap, in parallel with the polypropylene film self healing capacitor, the graphite nodule gap includes first end and second end, The first end of the polypropylene film self healing capacitor connects the first end of the graphite nodule gap, the polypropylene film self-healing The second end of formula capacitor connects the second end of the graphite nodule gap；

Control module, the control module is according to the voltage value or charge value of the polypropylene film self healing capacitor to disconnect Or the closure graphite nodule gap.

7. the system according to claim 6 for inhibiting transformer dc, which is characterized in that the inhibition transformer dc System further include:

Cabinet shell, the polypropylene film self healing capacitor and the graphite nodule gap are set to the interior of the cabinet shell The first end of portion, the first end of the polypropylene film self healing capacitor and the graphite nodule gap passes through the cabinet shell Side connector connects AC transformer, and the of the second end of the polypropylene film self healing capacitor and the graphite nodule gap Two ends connect ground by the other side connector of the cabinet shell.

8. the system according to claim 7 for inhibiting transformer dc, which is characterized in that the protection etc. of the cabinet shell Grade is IP23, and the material of the cabinet shell uses stainless steel material.

9. the system according to claim 6 for inhibiting transformer dc, which is characterized in that the graphite nodule gap is gathered with described Impedance after Polypropylene film self healing capacitor is in parallel is lower than 0.025 ohm, to maintain the duration of DC rated voltage to exist In first duration threshold value；The polypropylene film self healing capacitor is shell-type capacitor, to bear high surge current.

10. the system according to claim 6 for inhibiting transformer dc, which is characterized in that the inhibition transformer dc System further include:

First single-pole double-throw switch (SPDT), first single-pole double-throw switch (SPDT) include first end and second end；

Second single-pole double-throw switch (SPDT), second single-pole double-throw switch (SPDT) and the polypropylene film self healing capacitor and the stone Tampon gap is connected, then in parallel with the first single-pole double-throw switch (SPDT) progress, and second single-pole double-throw switch (SPDT) includes the One end and second end, the first end of second single-pole double-throw switch (SPDT) connect the first end of first single-pole double-throw switch (SPDT), institute The second end for stating the second single-pole double-throw switch (SPDT) connects the polypropylene film self healing capacitor and the graphite nodule gap, and described the The second end of one single-pole double-throw switch (SPDT) is grounded.