CN113066685B - Passive triggering contact device of power electronic tap switch - Google Patents
Passive triggering contact device of power electronic tap switch Download PDFInfo
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- CN113066685B CN113066685B CN202110170877.5A CN202110170877A CN113066685B CN 113066685 B CN113066685 B CN 113066685B CN 202110170877 A CN202110170877 A CN 202110170877A CN 113066685 B CN113066685 B CN 113066685B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/08—Bases; Stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
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Abstract
The invention provides a contact device of a passive triggering power electronic tap switch, which comprises: a plurality of static contacts, a main contact, two thyristor trigger contacts, two thyristor auxiliary contacts and a transmission shaft, wherein all the static contacts are distributed on the circumference taking the transmission shaft as the center, the main contact, the thyristor trigger contacts and the thyristor auxiliary contacts are connected with the transmission shaft, along with the contact of the transmission shaft and different parts of the static contacts, the main contact is contacted with a first part of the static contacts, the thyristor trigger contacts are contacted with a second part of the static contacts, the thyristor auxiliary contacts are contacted with a third part of the static contacts, by setting the lengths of the three parts of the static contact, and enabling the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts to rotate under the driving of the transmission shaft, the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts are respectively contacted with different parts of different static contacts, the passive triggering switching of the power electronic tap switch is realized, the device cost is lower, the control of the switching process is simple, and the stability is high.
Description
Technical Field
The invention relates to the technical field of power switches, in particular to a contact device of a passive-triggered power electronic tap switch
Background
Voltage is an important quality indicator in power systems. When the power system normally operates, the voltage changes, which causes the abnormal operation of the electric equipment, and directly affects the production and daily life, so the voltage regulation is one of the main tasks of the power system.
The transformer on-load voltage regulation is to regulate voltage through a tap switch under the condition of no power failure, in the prior art, a switching method capable of carrying out passive triggering on a power electronic tap switch is provided, and the principle of the passive triggering is as follows:
referring to fig. 1, which is a schematic diagram of a power electronic tap changer in the prior art, A, B denotes two fixed contacts of the tap changer, MC denotes a main contact of the tap changer, VS1 and VS2 denote thyristors, S1 and S3 denote thyristor auxiliary contacts, S2 and S4 denote thyristor trigger contacts, TR1 and TR2 denote trigger resistors, and R denotes a transition resistor.
(1) When the device normally operates, the main contact MC is contacted with the static contact A to realize current carrying; the contacts S1, S2, S3, S4 are connected to the stationary contact a through a mechanical switch.
(2) Before the tap changer is not switched, because A, MC and O are at the same potential, two ends of the thyristor are short-circuited, and no trigger current exists, and the thyristor VS1 and the thyristor VS2 are not conducted.
(3) When the tap changer starts to switch, the main contact MC needs to be controlled to leave the static contact a before the contacts S1, S2, S3 and S4. At this time, since the contacts S1, S2, S3, S4 are still connected to the tap a, there will be a potential difference across the thyristor, which is the voltage at the tap of the distribution transformer.
(4) The potential difference further generates voltage drop at two ends of the thyristors VS1 and VS2, and trigger current can be provided for the thyristors through trigger resistance voltage division, so that the thyristors are switched on, an external power supply is not needed to trigger the thyristors in the switching-on process of the thyristors, and the passive triggering of the power electronic tap switch is realized.
However, the contact structure of the mechanical tap changer and the contact structure of the pure power electronic tap changer adopted by the existing power electronic tap changer cannot realize passive triggering switching.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a contact device of a passively triggered power electronic tap changer, which can realize contact switching of the passively triggered power electronic tap changer, and has high switching reliability and low cost.
The embodiment of the invention provides a contact device of a passive triggering power electronic tap switch, which comprises: the thyristor trigger circuit comprises at least two fixed contacts, a main contact, two thyristor trigger contacts, two thyristor auxiliary contacts and a transmission shaft;
all static contacts are arc-shaped conducting strips with the same radius, and are distributed on a circumference which takes the rotating shaft as the center of a circle to form a cylindrical structure around the rotating shaft;
the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts are all connected to the transmission shaft, rotate along with the transmission shaft and are in sliding contact with the fixed contact, the rotating tracks of the two thyristor trigger contacts are the same, and the rotating tracks of the two thyristor auxiliary contacts are the same;
each static contact comprises: a first portion in contact with the main contact, a second portion in contact with the two thyristor trigger contacts, and a third portion in contact with the two thyristor auxiliary contacts; the length of the first part is smaller than that of the second part, the length of the second part is smaller than that of the third part, and three parts of each static contact are distributed in the three parts;
the initial position of the main contact is located between an edge line of a first part of a first static contact and a center line of the first static contact, the first static contact is any one of the plurality of static contacts, the distance between the main contact and the first edge line closest to the main contact is a first distance, and an edge of the first part parallel to the center line is the first edge line;
the initial positions of the two thyristor trigger contacts are symmetrically distributed on two sides of the center line of the second part of the first fixed contact, the distance between one thyristor trigger contact and a second edge line closest to the thyristor trigger contact is a second distance, and the edge of the second part parallel to the center line is the second edge line;
the initial positions of the two thyristor auxiliary contacts are symmetrically distributed on two sides of the center line of the third part of the first fixed contact, the distance between one thyristor auxiliary contact and a third edge line closest to the thyristor auxiliary contact is a third distance, and the edge of the third part parallel to the center line is the third edge line;
wherein the first distance is less than the second distance, which is less than the third distance.
As a preferred embodiment, the first portion of the first fixed contact, the second portion of the first fixed contact, and the third portion of the first fixed contact are connected in an equipotential manner.
As a preferred embodiment, the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts rotate around a transmission shaft at the same angular speed;
as a preferred embodiment, the maximum contact area between the main contact and the fixed contact is the largest, the maximum contact area between the thyristor auxiliary contact and the fixed contact is the second largest, and the maximum contact area between the thyristor trigger contact and the fixed contact is the smallest.
The invention provides a contact device of a passive triggering power electronic tap switch, which comprises: the thyristor trigger contact is contacted with the second part of the static contact, the thyristor auxiliary contact is contacted with the third part of the static contact, and the length of the three parts is set so that the thyristor trigger contact and the thyristor auxiliary contact are driven by the transmission shaft to rotate, and the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts are respectively contacted with different parts of different static contacts. The contact device realizes the control of the passive triggering switching of the power electronic tap switch through the rotation of the transmission shaft, the control of the switching process is simple, the stability of the switching process is high, and the device cost is lower.
Drawings
Fig. 1 is a schematic diagram of a power electronic tap changer device of the prior art;
fig. 2 is a schematic structural view of a preferred embodiment of a contact arrangement of a passively triggered power electronic tap changer according to the present invention;
fig. 3 is a schematic structural view of another preferred embodiment of a contact arrangement of a passively triggered power electronic tap changer according to the present invention;
fig. 4 is a schematic structural diagram of a stationary contact of several preferred embodiments of a contact device of a passively triggered power electronic tap changer according to the present invention;
fig. 5 is a schematic view of the initial position of the individual contacts in a further preferred embodiment of the contact arrangement of a passively triggered power electronic tap changer according to the present invention;
fig. 6 is a timing diagram for the switching of a further preferred embodiment of the contact arrangement of a passively triggered power electronic tap changer according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The invention provides a contact arrangement for a passively triggered power electronic tap changer, comprising: the thyristor trigger circuit comprises at least two fixed contacts, a main contact, two thyristor trigger contacts, two thyristor auxiliary contacts and a transmission shaft;
all static contacts are arc-shaped conducting strips with the same radius, and are distributed on a circumference which takes the rotating shaft as the center of a circle to form a cylindrical structure around the rotating shaft;
the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts are all connected to the transmission shaft, rotate along with the transmission shaft and are in sliding contact with the fixed contact, the rotating tracks of the two thyristor trigger contacts are the same, and the rotating tracks of the two thyristor auxiliary contacts are the same;
the contact area of the static contact and the main contact is recorded as a first part, the contact area of the static contact and the two thyristor trigger contacts is recorded as a second part, the contact area of the static contact and the two thyristor auxiliary contacts is recorded as a third part, the length of the first part is smaller than that of the second part, the length of the second part is smaller than that of the third part, and the three parts of each static contact are distributed in a distributed mode.
In the specific implementation of this embodiment, referring to fig. 2, a schematic structural diagram of a preferred embodiment of a contact device of a passive-triggered power electronic tap switch provided by the present invention is shown, where 6 static contacts of the contact device are arc-shaped conductive sheets with the same radius, which are respectively a static contact a, a static contact B, a static contact C, a static contact D, a static contact E, and a static contact F, and the 6 static contacts are distributed on a circumference with a transmission shaft as a circle center and have the same radius;
the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts are all connected to a transmission shaft, rotate along with the transmission shaft and are respectively contacted with 6 static contacts through rotation;
it should be noted that, in this embodiment, the number of the given static contacts is 6, and in other embodiments, the number of the static contacts is set according to actual needs;
referring to fig. 3, which is a schematic structural view of another preferred embodiment of the contact device of the passively triggered power electronic tap changer provided by the embodiment of the present invention, the main contact MC, the thyristor trigger contact S2, the thyristor trigger contact S4, the thyristor auxiliary contact S1 and the thyristor auxiliary contact S3 are connected to a transmission shaft, wherein the thyristor trigger contact S2 and the thyristor trigger contact S4 are fixed at the same height of the transmission shaft, therefore, when the thyristor auxiliary contact MC, the two thyristor trigger contacts S2/S4 and the two thyristor auxiliary contacts S1/S3 are fixed at different heights of the transmission shaft, and when the thyristor auxiliary contact MC, the two thyristor trigger contacts S2/S4 and the two thyristor auxiliary contacts S1/S3 rotate around the transmission shaft, the thyristor auxiliary contact S1 and the thyristor auxiliary contact S3 are in contact with the static contact A to form three different tracks;
the static contact A comprises a first part in contact with the main contact, a second part in contact with the two thyristor trigger contacts and a third part in contact with the two thyristor auxiliary contacts; the length of the first part is smaller than that of the second part, the length of the second part is smaller than that of the third part, the three parts of the static contact A are symmetrically distributed with reference to a center line, the three parts are randomly arranged up and down to form static contacts with different structures, and the three parts of all the static contacts are arranged in the same sequence.
The upper and lower sequence of the first part, the second part and the third part of the static contact corresponds to the positions of the main contact, the thyristor trigger contact and the thyristor auxiliary contact.
It should be noted that the structure of the static contact provided in this embodiment is a structure in which the first portion is at the uppermost, the second portion is in the middle, and the third portion is at the lowermost arrangement order, which illustrates the structure of the contact device provided in the present invention, but the first portion, the second portion, and the third portion of the contact head have a plurality of different sorting manners in the vertical order, the vertical order of the three portions is different, and the positions of the main contact, the thyristor trigger contact, and the thyristor auxiliary contact are also different; after the positions of the main contact, the thyristor trigger contact and the thyristor auxiliary contact are determined, the sequence of all the static contacts should be consistent and correspond to the sequence of all the static contacts, which is not described herein again.
It should be noted that, in the embodiment of the present invention, the thicknesses of the first portion, the second portion, and the third portion of the fixed contact are the same, and the distances from the first portion, the second portion, and the third portion of the fixed contact to the transmission shaft are the same, at this time, the lengths of the main contact, the thyristor trigger contact, and the thyristor auxiliary contact are equal, but in other embodiments, the thicknesses of the three portions may be different, and the thicknesses from the transmission shaft are also different, at this time, the lengths of the main contact, the thyristor trigger contact, and the thyristor auxiliary contact need to be controlled, so that the main contact, the thyristor trigger contact, and the thyristor auxiliary contact are respectively in contact with the three portions of the fixed contact.
It should be noted that, in this embodiment, only the lengths of the three portions of the static contact are limited, and the widths of the three different portions are not limited, and in the specific implementation, the widths of the three portions may be the same or different according to the actual requirements, and have no influence on the specific implementation of the scheme.
Fig. 4 is a front view of several preferred embodiments of a stationary contact of a contact device of a passively triggered power electronic tap switch according to the present invention, and fig. a, b, and c are schematic structural views of three preferred embodiments of a stationary contact. The static contact configuration of fig. a, with the second portion in the middle, the first portion on the upper side of the second portion, and the third portion on the lower side of the second portion; the static contact structure shown in fig. b has a first portion in the middle, a second portion on the upper side of the first portion, and a third portion on the lower side of the first portion; the static contact structure shown in fig. c has a third portion in the middle, a second portion on the upper side of the third portion, and a first portion on the lower side of the third portion; when the three parts of the static contact are arranged in different orders, the positions of the main contact, the thyristor trigger contact and the thyristor auxiliary contact respectively correspond to the first part, the second part and the third part of the static contact.
It should be noted that, in this embodiment, only schematic structural diagrams of three types of fixed contacts are given, and in other embodiments, the fixed contact has other structures, which are consistent with the principle of this embodiment and are within the protection scope of this embodiment, and are not described herein again.
The invention provides a contact device of a passive triggering power electronic tap switch, which comprises: the thyristor trigger contact is contacted with the second part of the static contact, the thyristor auxiliary contact is contacted with the third part of the static contact, and the length of the three parts is set so that the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts are driven by the transmission shaft to rotate, and the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts are respectively contacted with different parts of different static contacts. The contact device realizes the control of the passive triggering switching of the power electronic tap switch through the rotation of the transmission shaft, the control of the switching process is simple, the stability of the switching process is high, and the device cost is lower.
In another embodiment provided by the present invention, the initial position of the main contact is located between an edge line of a first portion of a first fixed contact and a center line of the first fixed contact, the first fixed contact is any one of a plurality of fixed contacts, a distance between the main contact and the first edge line closest to the main contact is a first distance, and an edge of the first portion parallel to the center line is the first edge line;
the initial positions of the two thyristor trigger contacts are symmetrically distributed on two sides of the center line of the second part of the first fixed contact, the distance between one thyristor trigger contact and a second edge line closest to the thyristor trigger contact is a second distance, and the edge of the second part parallel to the center line is the second edge line;
the initial positions of the two thyristor auxiliary contacts are symmetrically distributed on two sides of the center line of the third part of the first fixed contact, the distance between one thyristor auxiliary contact and a third edge line closest to the thyristor auxiliary contact is a third distance, and the edge of the third part parallel to the center line is the third edge line;
wherein the first distance is less than the second distance, which is less than the third distance.
In another embodiment of the present invention, the first portion of the first fixed contact, the second portion of the first fixed contact, and the third portion of the first fixed contact are connected in an equipotential manner.
In a further embodiment provided by the invention, the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts rotate around a transmission shaft at the same angular speed;
in another embodiment of the present invention, the maximum contact area between the main contact and the fixed contact is the largest, the maximum contact area between the thyristor auxiliary contact and the fixed contact is the second largest, and the maximum contact area between the thyristor trigger contact and the fixed contact is the smallest.
In specific implementation, referring to fig. 5, which is a schematic diagram of initial positions of respective contacts in another preferred embodiment of the contact device of the passive-triggered power electronic tap switch provided by the present invention, in an initial state, the main contact MC is in contact with a first portion of the fixed contact a, the thyristor trigger contacts S2, S4 are in contact with a second portion of the fixed contact a, and the thyristor trigger contacts S1, S3 are in contact with a third portion of the fixed contact a, in the initial state, the main contact MC needs to carry current for a long time, during the switching process, the thyristor auxiliary contacts S1, S3 need to carry current separately in sequence, and the thyristor trigger contacts S2, S4 only need to provide a smaller trigger current, so that, in the specific implementation, the contact area between the fixed contact a and the main contact MC is the largest, the contact area between the fixed contact a and the thyristor auxiliary contacts S3, S1 is the second, and the fixed contact a is the contact a second contact between the thyristor trigger contact a and the thyristor trigger contacts S2, The contact area of S4 is minimum;
the differential current-carrying area is set according to the current-carrying strength of different contacts, so that the manufacturing cost can be reduced on the premise of ensuring the stability and safety of the switching process;
in this embodiment, the initial position of the main contact MC is located between the edge line of the first portion of the static contact a and the center line, and the distance from the edge line of the first portion is L1; the thyristor trigger contacts S2 and S4 are respectively positioned at two sides of the center line of the second part of the static contact A, are symmetrical according to the center line, and have a distance L2 with the edge line of the second part; the thyristor auxiliary contacts S1 and S3 are respectively positioned at two sides of the center line of the second part of the static contact A, are symmetrical according to the center line, and have a distance L3 with the edge line of the third part, so that in the switching process, the main contact MC is firstly disconnected with the static contact A, then the thyristor trigger contact S2 is used, and the thyristor auxiliary contact S1 is finally disconnected with the static contact A; l1< L2< L3;
the main contact, the thyristor trigger contact and the thyristor auxiliary contact are connected through a transmission shaft, have the same angular speed by rotating around the transmission shaft, and have the same sequence when contacting with different static contacts every time, so that the switching time sequence of the tap switch is kept unchanged;
the three different parts of each static contact are connected in an equipotential manner, but the potentials of the different static contacts are not necessarily the same, and the tapping switch can be switched on the potentials of the different static contacts by contacting the main contact, the thyristor trigger contact and the thyristor auxiliary contact with the different static contacts;
by setting the initial positions of a main contact, a thyristor trigger contact and a thyristor auxiliary contact of the tap switch and rotating at the same angular speed through a transmission shaft, the switching time sequence requirement of the passively triggered power electronic tap switch can be met by contacting different static contacts, and the requirement of tapping and switching different voltages can be met;
in a specific implementation of the invention, referring to fig. 1, a circuit comprises: a static contact A, a static contact B, a main contact MC, a thyristor VS1, a thyristor VS2, a thyristor auxiliary contact S3, a thyristor auxiliary contact S1, a thyristor trigger contact S2, a thyristor trigger contact S4, a resistor R, a first resistor TR1, a second resistor TR2, a third resistor TR3 and a fourth resistor TR4, wherein the static contact A and the static contact B are two adjacent static contacts, and in an initial state, the connection relationship of the tap switch is as shown in the figure, the static contact B is suspended, the static contact A is connected with an output end O through the main contact MC, the thyristor auxiliary contact S1 is connected with a first end of the thyristor VS1, a second end of the thyristor VS1 is connected with the output end O through the resistor R, the thyristor auxiliary contact S2 is connected with a first end of the thyristor VS2, a second end of the thyristor VS2 is connected with the output end O, one end of the thyristor trigger contact S2 is connected with the static contact A, and the other end of the trigger contact S2 is connected with a first end of the first resistor TR1, a second end of the first resistor TR1 is connected with a first end of the second resistor TR2 and a trigger end of the thyristor VS1, and a second end of the second resistor TR2 is connected with the output end O; one end of the thyristor trigger contact S4 is connected with the fixed contact A, the other end of the thyristor trigger contact S4 is connected with the first end of the third resistor TR3, the second end of the third resistor TR3 is connected with the first end of the fourth resistor TR4 and the trigger end of the thyristor VS1, and the second end of the fourth resistor TR4 is connected with the output end O;
referring to fig. 6, it is a switching timing diagram of another preferred embodiment of the contact device of the passively triggered power electronic tap changer provided by the present invention, and the switching timing of the passive triggering of the power electronic tap changer is as follows:
in the initial position, MC, S1, S2, S3 and S4 are all connected with the contact A, as shown in the figure I;
the main contact MC is disconnected from the static contact A, as shown in figure II;
the thyristor trigger contact S2 disconnects from the stationary contact a, as shown in fig. iii;
the thyristor auxiliary contact S1 is disconnected from the stationary contact a, as shown in fig. iv;
the thyristor auxiliary contact S1 is established in connection with the stationary contact B, as shown in fig. v;
the thyristor trigger contact S2 establishes a connection with the stationary contact B, as shown in fig. vi;
the thyristor trigger contact S4 disconnects from the static contact a, as shown in fig. vii;
the main contact MC is established in the connection of the stationary contact B, as shown in fig. viii;
the thyristor auxiliary contact S3 is disconnected from the stationary contact a, as shown in fig. ix;
the thyristor auxiliary contact S3 is established in connection with the stationary contact B, as shown in fig. x;
the thyristor trigger contact S4 is established in the connection of the stationary contact B, as shown in fig. xi;
at this time, the tap switch is completely switched from the contact of the static contact a to the static contact B to complete a complete switching process, and then the process of switching from the static contact B to the static contact C adjacent to the static contact B is the same as the process, which is not described herein again.
The invention provides a contact device of a passive triggering power electronic tap switch, which comprises: the static contacts are distributed on the circumference taking the transmission shaft as the center, the main contact, the thyristor trigger contact and the thyristor auxiliary contact are fixed on the transmission shaft, along with the contact of the transmission shaft and different parts of the static contacts, the main contact is contacted with a first part of the static contacts, the thyristor trigger contact is contacted with a second part of the static contacts, and the thyristor auxiliary contact is contacted with a third part of the static contacts, by setting the lengths of the three parts of the static contact, setting the initial positions and the rotation angular speeds of the main contact, the thyristor auxiliary contact and the thyristor trigger contact, the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts can be driven by the transmission shaft to rotate and respectively contact different parts of different static contacts according to a certain sequence. The contact device can realize the switching of the power electronic switch to different fixed contacts by controlling the rotation of the rotating shaft, and keeps the established switching time sequence, the control of the switching process is simple, the stability of the switching process is high, and the cost of the device is lower.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (4)
1. A contact arrangement of a passively triggered power electronic tap changer, characterized in that the contact arrangement comprises: the thyristor trigger circuit comprises at least two fixed contacts, a main contact, two thyristor trigger contacts, two thyristor auxiliary contacts and a transmission shaft;
all static contacts are arc-shaped conducting strips with the same radius, and are distributed on a circumference which takes the transmission shaft as the center of a circle to form a cylindrical structure around the transmission shaft;
the main contact, the two thyristor trigger contacts and the two thyristor auxiliary contacts are all connected to the transmission shaft, rotate along with the transmission shaft and are in sliding contact with the fixed contact, the rotating tracks of the two thyristor trigger contacts are the same, and the rotating tracks of the two thyristor auxiliary contacts are the same;
each static contact comprises: a first portion in contact with the main contact, a second portion in contact with the two thyristor trigger contacts, and a third portion in contact with the two thyristor auxiliary contacts; the length of the first part is smaller than that of the second part, the length of the second part is smaller than that of the third part, and three parts of each static contact are distributed in the middle;
the initial position of the main contact is located between an edge line of a first part of a first static contact and a center line of the first static contact, the first static contact is any one of a plurality of static contacts, the distance between the main contact and the first edge line closest to the main contact is a first distance, and an edge of the first part parallel to the center line is the first edge line;
the initial positions of the two thyristor trigger contacts are symmetrically distributed on two sides of the center line of the second part of the first fixed contact, the distance between one thyristor trigger contact and a second edge line closest to the thyristor trigger contact is a second distance, and the edge of the second part parallel to the center line is the second edge line;
the initial positions of the two thyristor auxiliary contacts are symmetrically distributed on two sides of the center line of the third part of the first fixed contact, the distance between one thyristor auxiliary contact and a third edge line closest to the thyristor auxiliary contact is a third distance, and the edge of the third part parallel to the center line is the third edge line;
wherein the first distance is less than the second distance, which is less than the third distance.
2. The contact device of a passively triggered power electronic tap switch of claim 1, wherein the first portion of the first stationary contact and the second portion of the first stationary contact are equipotentially connected to the third portion of the first stationary contact.
3. A contact arrangement of a passively triggered power electronic tap changer according to claim 1, characterized in that said main contact, said two thyristor trigger contacts and said two thyristor auxiliary contacts rotate around a drive shaft at the same angular speed.
4. The contact device of claim 1, wherein a maximum contact area between the main contact and the first stationary contact is largest, a maximum contact area between the thyristor auxiliary contact and the first stationary contact is second, and a maximum contact area between the thyristor trigger contact and the first stationary contact is smallest.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110170877.5A CN113066685B (en) | 2021-02-08 | 2021-02-08 | Passive triggering contact device of power electronic tap switch |
| PCT/CN2021/091943 WO2022001362A1 (en) | 2020-06-29 | 2021-05-06 | Passive triggered-power electronic tap-changer device and contact device |
| US18/010,228 US20230230780A1 (en) | 2020-06-29 | 2021-05-06 | Passive triggered-power electronic tap-changer device and contact device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110170877.5A CN113066685B (en) | 2021-02-08 | 2021-02-08 | Passive triggering contact device of power electronic tap switch |
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| Publication Number | Publication Date |
|---|---|
| CN113066685A CN113066685A (en) | 2021-07-02 |
| CN113066685B true CN113066685B (en) | 2022-05-20 |
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| CN202110170877.5A Active CN113066685B (en) | 2020-06-29 | 2021-02-08 | Passive triggering contact device of power electronic tap switch |
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| CN103578799A (en) * | 2013-11-05 | 2014-02-12 | 国家电网公司 | Telescopic contact assembly for thyristor on-load tap switch |
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| CN111899999A (en) * | 2020-06-29 | 2020-11-06 | 南方电网科学研究院有限责任公司 | Power electronic tap changer and distribution transformer |
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2021
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| CN103426657A (en) * | 2012-05-17 | 2013-12-04 | 上海华明电力设备集团有限公司 | Switching structure between moving contacts and fixed contacts of tapping selector |
| CN203242512U (en) * | 2013-04-24 | 2013-10-16 | 辽宁金立电力电器有限公司 | On-load capacitance-regulating voltage-regulating tapping switch |
| CN103578799A (en) * | 2013-11-05 | 2014-02-12 | 国家电网公司 | Telescopic contact assembly for thyristor on-load tap switch |
| CN203573832U (en) * | 2013-11-05 | 2014-04-30 | 国家电网公司 | Thyristor on-load tap-changer telescoping contact assembly |
| CN111899999A (en) * | 2020-06-29 | 2020-11-06 | 南方电网科学研究院有限责任公司 | Power electronic tap changer and distribution transformer |
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|---|---|
| CN113066685A (en) | 2021-07-02 |
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