CN109243792B - A single-item is transferred and is held switch for transferring hold transformer - Google Patents
A single-item is transferred and is held switch for transferring hold transformer Download PDFInfo
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- CN109243792B CN109243792B CN201811174994.3A CN201811174994A CN109243792B CN 109243792 B CN109243792 B CN 109243792B CN 201811174994 A CN201811174994 A CN 201811174994A CN 109243792 B CN109243792 B CN 109243792B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention belongs to the technical field of electricity, and discloses a single-item capacity regulating switch for a capacity regulating transformer, wherein a coil switching operation mechanism is formed by a fixedly arranged chute and an operation plate which is arranged in the chute in a sliding manner; the side wall of the sliding chute is provided with a vertical sliding chute corresponding to the vacuum arc-extinguishing chamber, the U-shaped moving part is provided with a guide rail groove corresponding to the vacuum arc-extinguishing chamber, and two ends of a transformation shaft at the end part of a switching-closing pull rod of the vacuum arc-extinguishing chamber penetrate through a pair of guide rail grooves corresponding to the U-shaped moving part and then are assembled in a pair of vertical sliding chutes corresponding to the U-shaped support; the guide rail groove comprises a low section and a high section which are respectively used for driving the opening and closing of the vacuum arc extinguish chamber. According to the invention, through the design of the U-shaped support and the U-shaped movable piece and the combined arrangement of the guide rail groove, the complex processes of synchronization of high-voltage and low-voltage switching, sequential actions of high-voltage and low-voltage switching and the like can be completed by one simplest one-way driving action.
Description
Technical Field
The invention belongs to the technical field of electricity, relates to capacity regulating transformer equipment in the power industry, and particularly relates to a capacity regulating switch for a capacity regulating transformer.
Background
The on-load capacity-regulating transformer is a transformer with two kinds of rated capacities. According to the load, the connection mode of the transformer winding is switched by using a special capacitance regulating switch under the condition of not cutting off a power supply, and then the switching of the transformer between two different capacities is realized.
The capacitance-regulating switch in the prior art has the following problems: the high-voltage and low-voltage contacts of the capacitance-regulating switch adopt a common oil chamber structure. During the capacitance-regulating conversion process, both the high-voltage contacts and the low-voltage contacts generate electric arcs, which cause damage to the contacts and lead to an electrical life of only 3 to 5 ten thousand times. The service life of the transformer is calculated according to 20 years, and the switching can be carried out only 4 to 6 times every day, so that the actual requirement cannot be met; the oil quality is easily degraded by the electric arc, and power is cut off for oil change maintenance every 2000 times (about one year), so that the capacity regulating transformer is greatly resisted to be popularized.
In order to solve the above problems, chinese patent CN204390926U proposes a capacity regulating switch with a vacuum arc-extinguishing chamber. Although the capacity regulating switch solves the problem of electric arc generation, the capacity regulating switch has the advantages of more parts, complex structure and higher failure rate.
Disclosure of Invention
The invention aims to provide a novel capacity-regulating switch coil switching operating mechanism aiming at the defects of the conventional capacity-regulating transformer switch, and the operating mechanism can complete high-low voltage synchronous switching and a complex opening and closing action process of each vacuum arc extinguish chamber under a specific time sequence in the high-voltage and low-voltage switching process by a simplest one-way driving action.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a polynomial transfers appearance switch for transferring appearance transformer, three for a set of three-phase that corresponds transfers appearance transformer is arranged in transferring appearance transformer, includes first group vacuum interrupter and second group vacuum interrupter, is located transfer appearance switch both sides respectively and is used for controlling the first side switched systems, the second side switched systems of each vacuum interrupter divide-shut brake, is used for driving the electromagnetism actuating mechanism of first side switched systems and second side switched systems action.
The first side switching system comprises a vacuum arc-extinguishing chamber and a set of first side operating mechanism for driving the vacuum arc-extinguishing chamber to open and close; the second side switching system comprises four vacuum arc-extinguishing chambers and a set of second side switching operation mechanism for driving the four vacuum arc-extinguishing chambers to be switched on and off;
the first switching operation mechanism and the second side switching operation mechanism respectively comprise a fixedly arranged U-shaped bracket and a U-shaped movable piece arranged in the U-shaped bracket in a sliding way; at least one pair of transverse long grooves for supporting the U-shaped moving part and allowing the U-shaped moving part to slide linearly in a reciprocating mode are symmetrically arranged on two side walls of the U-shaped support, through holes corresponding to the transverse long grooves in the U-shaped support are symmetrically arranged on the two side walls of the U-shaped moving part, support shafts are assembled in the through holes, two ends of each support shaft penetrate through the transverse long grooves, rollers are mounted at two ends of each support shaft, and the rollers at two ends of each support shaft are arranged in the transverse long grooves in the U-shaped support to move horizontally.
And vertical sliding grooves (vertical refers to the movement direction of the movable conducting rod of the vacuum arc-extinguishing chamber) which are respectively used for transversely positioning the switching-closing pull rod of the vacuum arc-extinguishing chamber and allowing the switching-closing pull rod to vertically move up and down are symmetrically arranged on two side walls of the U-shaped support of each of the first side switching operation mechanism and the second side switching operation mechanism.
Two side walls of the U-shaped moving part of each of the first side switching operation mechanism and the second side switching operation mechanism are symmetrically provided with guide rail grooves which are respectively used for driving the opening and closing pull rod of the vacuum arc-extinguishing chamber to vertically move up and down,
the movable conducting rods of the vertical arc-extinguishing chambers are respectively connected with the opening and closing pull rods in an insulating mode (connected through insulators), the end portions of the opening and closing pull rods are provided with transformation shafts, and the two ends of each transformation shaft at the end portion of each opening and closing pull rod of each vacuum arc-extinguishing chamber penetrate through a pair of guide rail grooves corresponding to the U-shaped movable piece and then are assembled in a pair of vertical sliding grooves corresponding to the U-shaped support. The two ends of the conversion shaft are provided with rollers which are respectively arranged in the guide rail groove and the vertical sliding groove.
The guide rail groove comprises a low section and a high section, the low section is used for driving the vacuum arc extinguish chamber to be switched off, the high section is used for driving the vacuum arc extinguish chamber to be switched on, and the high section and the low section are in transitional connection through a middle inclined section; the total length of three sections of the guide rail grooves is equal to ensure the same movement period.
Further, when dy (yy) is used for capacity adjustment, the vacuum arc-extinguishing chambers in the first side switching system are respectively a high-voltage first corner-connected vacuum arc-extinguishing chamber Kg1, a high-voltage star-connected vacuum arc-extinguishing chamber Kgg and a high-voltage transition vacuum arc-extinguishing chamber Kgc connected in series with a transition resistor, a first side of a first guide rail groove corresponding to the vacuum arc-extinguishing chamber Kgc is a high-level section, a second side of the first guide rail groove corresponding to the vacuum arc-extinguishing chamber Kg1 is a low-level section, and the second side of the first guide rail groove is a high-level section; the high section of the third guide rail groove corresponding to the vacuum arc-extinguishing chamber Kgg is positioned at the first side, and the low section is positioned at the second side; the high section of the first guide rail groove is equal to the low section of the third guide rail groove in length, the high section of the third guide rail groove is equal to the low section of the first guide rail groove, and the low section of the second guide rail groove is equal to the high section;
the four vacuum arc-extinguishing chambers in the second side switching system are respectively a low-voltage first parallel vacuum arc-extinguishing chamber Kd1, a low-voltage second parallel vacuum arc-extinguishing chamber Kd2, a series vacuum arc-extinguishing chamber Kdg and a vacuum arc-extinguishing chamber Kdc connected with a transition resistor in series, the first side of a fourth guide rail groove corresponding to the Kd1 of the vacuum arc-extinguishing chamber is a low-level section, and the second side of the fourth guide rail groove is a high-level section; the first side of the fifth guide rail groove corresponding to the vacuum arc-extinguishing chamber Kdh is a high section, and the second side is a low section; the first side of a sixth guide rail groove corresponding to a vacuum arc-extinguishing chamber Kdc connected with a transition resistor in series is a high-level section, and the second side is a low-level section; the first side of the seventh guide rail groove corresponding to the vacuum arc-extinguishing chamber Kd2 is a low section, and the second side is a high section; the high section and the low section of the fourth guide rail groove and the seventh guide rail groove are equal in length, the high section of the fifth guide rail groove is equal to the low section of the sixth guide rail groove in length and is longer than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove, and the low section of the fifth guide rail groove is equal to the high section of the sixth guide rail groove in length and is shorter than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove.
The electromagnetic driving mechanism converts vertical motion into transverse motion through the crank arm type transmission piece. And the U-shaped movable parts of the first side switching system and the second side switching operation mechanism slide forwards transversely to complete the connection conversion of the high-voltage winding coil and the low-voltage winding coil.
On the contrary, the electromagnetic driving mechanism converts the vertical motion into the transverse motion through the crank arm type transmission piece, and the U-shaped movable piece of the first side switching system and the U-shaped movable piece of the second side switching operation mechanism transversely slide backwards to complete the connection conversion of the high-voltage winding coil and the low-voltage winding coil.
When Dy (Dy) is used for conversion and capacity adjustment, the four vacuum arc-extinguishing chambers in the first side switching system are respectively a high-voltage first parallel vacuum arc-extinguishing chamber Kg1, a high-voltage series vacuum arc-extinguishing chamber Kgg, a high-voltage transition vacuum arc-extinguishing chamber Kgc connected with a transition resistor in series and a high-voltage second parallel vacuum arc-extinguishing chamber Kg2, the first side of a first guide rail groove corresponding to the vacuum arc-extinguishing chamber Kgc is a high-level section, the second side of the first guide rail groove corresponding to the first corner-connected vacuum arc-extinguishing chamber Kg1 is a low-level section, and the second side of the first guide rail groove is a high-level section; the high section of the third guide rail groove corresponding to the star-connected vacuum arc-extinguishing chamber Kgg is positioned at the first side, and the low section is positioned at the second side; the high-level section of the first guide rail groove is equal to the low-level section of the third guide rail groove in length, the high-level section of the third guide rail groove is equal to the low-level section of the first guide rail groove, the low-level section of the second guide rail groove is the same as the high-level section, when the eighth guide rail groove corresponds to the vacuum arc-extinguishing chamber Kg2, the first side of the eighth guide rail groove is the low-level section, the second side of the eighth guide rail groove is the high-level section, and the high-level section is equal to the low-level section; when a second angle joint vacuum arc extinguish chamber possibly exists corresponding to the eighth guide rail groove, the first side of the eighth guide rail groove is a low section, the second side is a high section, the length of the high section is the same as that of the low section, the first side of the eighth guide rail groove corresponding to the second angle joint vacuum arc extinguish chamber is a low section, the second side is a high section, and the length of the high section is the same as that of the low section;
the four vacuum arc-extinguishing chambers in the second side switching system are respectively a low-voltage first parallel vacuum arc-extinguishing chamber Kd1, a low-voltage second parallel vacuum arc-extinguishing chamber Kd2, a low-voltage series vacuum arc-extinguishing chamber Kdg and a series vacuum arc-extinguishing chamber Kdc connected with a transition resistor in series, the first side of a fourth guide rail groove corresponding to the first vacuum arc-extinguishing chamber Kd1 is a low-level section, and the second side of the fourth guide rail groove is a high-level section; the first side of the fifth guide rail groove corresponding to the vacuum arc-extinguishing chamber Kdg is a high section, and the second side is a low section; the first side of a sixth guide rail groove corresponding to a vacuum arc-extinguishing chamber Kdc connected with a transition resistor in series is a high-level section, and the second side is a low-level section; the first side of the seventh guide rail groove corresponding to the vacuum arc-extinguishing chamber Kd2 is a low section, and the second side is a high section; the high section and the low section of the fourth guide rail groove and the seventh guide rail groove are equal in length, the high section of the fifth guide rail groove is equal to the low section of the sixth guide rail groove in length and is longer than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove, and the low section of the fifth guide rail groove is equal to the high section of the sixth guide rail groove in length and is shorter than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove.
The electromagnetic driving mechanism converts vertical motion into transverse motion through the crank arm type transmission piece. And the U-shaped movable parts of the first side switching system and the second side switching operation mechanism slide forwards transversely to complete the connection conversion of the high-voltage winding coil and the low-voltage winding coil.
On the contrary, the electromagnetic driving mechanism converts the vertical motion into the transverse motion through the crank arm type transmission piece, and the U-shaped movable piece of the first side switching system and the U-shaped movable piece of the second side switching operation mechanism transversely slide backwards to complete the connection conversion of the high-voltage winding coil and the low-voltage winding coil.
When Dy (Yz) is used for conversion and capacity adjustment, the four vacuum arc-extinguishing chambers in the first side switching system are respectively a high-voltage first corner-connected vacuum arc-extinguishing chamber Kg1, a star-connected vacuum arc-extinguishing chamber Kgg, a high-voltage transition vacuum arc-extinguishing chamber Kgc connected with a transition resistor in series and a low-voltage third parallel vacuum arc-extinguishing chamber Kd3, the first side of a first guide rail groove corresponding to the high-voltage transition vacuum arc-extinguishing chamber Kgc is a high-level section, the second side of the first guide rail groove corresponding to the vacuum arc-extinguishing chamber Kg1 is a low-level section, and the second side of the first guide rail groove is a high-level section; the high section of the third guide rail groove corresponding to the vacuum arc-extinguishing chamber Kgg is positioned at the first side, and the low section is positioned at the second side; the high-level section of the first guide rail groove is equal to the low-level section of the third guide rail groove in length, the high-level section of the third guide rail groove is equal to the low-level section of the first guide rail groove, the low-level section of the second guide rail groove is equal to the high-level section, when the eighth guide rail groove corresponds to the vacuum arc-extinguishing chamber Kd3, the first side of the eighth guide rail groove is the low-level section, the second side of the eighth guide rail groove is the high-level section, and the high-level section is equal to the low-level section; when the eighth guide rail groove corresponds to a possible second angle connection vacuum arc extinguish chamber, the first side of the eighth guide rail groove is a low section, the second side is a high section, the length of the high section is the same as that of the low section, the first side of the eighth guide rail groove corresponding to the third low-voltage parallel vacuum arc extinguish chamber is a low section, the second side is a high section, and the length of the high section is the same as that of the low section;
the four vacuum arc-extinguishing chambers in the second side switching system are respectively a low-voltage first parallel vacuum arc-extinguishing chamber Kd1, a low-voltage second parallel vacuum arc-extinguishing chamber Kd2, a series vacuum arc-extinguishing chamber Kdg and a vacuum arc-extinguishing chamber Kdc connected with a transition resistor in series, the first side of a fourth guide rail groove corresponding to the vacuum arc-extinguishing chamber Kd1 is a low-level section, and the second side of the fourth guide rail groove is a high-level section; the first side of the fifth guide rail groove corresponding to the vacuum arc-extinguishing chamber Kdg is a high section, and the second side is a low section; the first side of a sixth guide rail groove corresponding to a vacuum arc-extinguishing chamber Kdc connected with a transition resistor in series is a high-level section, and the second side is a low-level section; the first side of the seventh guide rail groove corresponding to the vacuum arc-extinguishing chamber Kd2 is a low section, and the second side is a high section; the high section and the low section of the fourth guide rail groove and the seventh guide rail groove are equal in length, the high section of the fifth guide rail groove is equal to the low section of the sixth guide rail groove in length and is longer than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove, and the low section of the fifth guide rail groove is equal to the high section of the sixth guide rail groove in length and is shorter than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove.
The electromagnetic driving mechanism converts vertical motion into transverse motion through the crank arm type transmission piece. And the U-shaped movable parts of the first side switching system and the second side switching operation mechanism slide forwards transversely to complete the connection conversion of the high-voltage winding coil and the low-voltage winding coil.
On the contrary, the electromagnetic driving mechanism converts the vertical motion into the transverse motion through the crank arm type transmission piece, and the U-shaped movable piece of the first side switching system and the U-shaped movable piece of the second side switching operation mechanism transversely slide backwards to complete the connection conversion of the high-voltage winding coil and the low-voltage winding coil.
The invention has the beneficial effects that: through the design of the U-shaped support and the U-shaped movable part and the combination arrangement of the guide rail grooves, the complex opening and closing action process under the specific time sequence of each vacuum arc extinguish chamber in the high-voltage and low-voltage switching process and the high-voltage and low-voltage synchronous switching process can be completed through the simplest one-way driving action.
Description of the drawings:
FIG. 1 is a schematic circuit diagram of a low-capacity low-voltage side winding of a capacitance-regulating transformer using Dy (Yy) conversion for capacitance regulation;
FIG. 2 is a schematic circuit diagram of a large-capacity low-voltage side winding of the capacitance-regulating transformer using Dy (Yy) conversion for capacitance regulation;
FIG. 3 is a schematic circuit diagram of a low-capacity high-voltage side winding of the capacitance-regulating transformer using Dy (Yy) conversion for capacitance regulation;
FIG. 4 is a schematic circuit diagram of a large-capacity high-voltage side winding of the capacitance-regulating transformer using Dy (Yy) conversion for capacitance regulation;
FIG. 5 is a front view of a U-shaped bracket of a second side switching mechanism for adjusting capacitance by Dy (Yy) conversion according to the present invention;
FIG. 6 is a front view of a U-shaped moving member of the second side switching mechanism when Dy (Yy) is used for capacity modulation;
FIG. 7 is a schematic view of a U-shaped movable member and a U-shaped bracket of the second side switching mechanism according to the present invention when Dy (Yy) is used for capacity modulation;
FIG. 8 is a schematic diagram of a second side switching mechanism for capacitance adjustment using Dy (Yy) conversion according to the present invention;
FIG. 9 is a front view of a U-shaped frame of a first side-switching operating mechanism for adjusting capacity by Dy (Yy) conversion according to the present invention;
FIG. 10 is a front view of a U-shaped moving part of the first side switching mechanism when Dy (Yy) is used for capacity modulation;
FIG. 11 is a schematic view of a U-shaped moving member and a U-shaped bracket of the first side switching mechanism when Dy (Yy) is used for capacity modulation;
FIG. 12 is a schematic diagram of a first side switching mechanism for capacitance adjustment using Dy (Yy) conversion in the present invention;
FIG. 13 is a schematic view of the mounting shaft and the swing arm;
fig. 14 is A view from direction A-O-A of fig. 13.
In the figure: wherein K represents a vacuum arc-extinguishing chamber, a symbol 'day' represents that the vacuum arc-extinguishing chamber is in a closing state, and a symbol 'eye' represents that the vacuum arc-extinguishing chamber is in an opening state; r represents transition resistance; t represents time.
Detailed Description
The structure and principle of the capacitance-regulating switch of the present invention will be described more clearly and completely with reference to the accompanying drawings by taking an embodiment as an example.
When dy (yy) is used for capacitance adjustment, the capacitance adjustment switch of the present example includes a first side switching system, a second side switching system, and an electromagnetic driving mechanism 8 for driving the first side switching system and the second side switching system to operate.
The first side switching system comprises three vacuum arc-extinguishing chambers and a set of first side switching operation mechanism for driving the three vacuum arc-extinguishing chambers to be switched on and off. The first side switching operating mechanism comprises a U-shaped bracket 12 and a U-shaped movable piece 16. As shown in fig. 9, the U-shaped bracket 12 of the first side switching operation mechanism is provided with three pairs of vertical sliding grooves 10 and two pairs of horizontal elongated grooves 11. As shown in fig. 10, the U-shaped movable member 16 of the first side switching operation mechanism has three pairs of guide rail grooves 14 matching with the three pairs of vertical sliding grooves 10 on the U-shaped bracket 12 of fig. 9, the U-shaped movable member 16 is further provided with two pairs of through holes 15, the two pairs of through holes 15 respectively match with the two pairs of transverse elongated grooves 11 on the U-shaped bracket 12 of fig. 9, the through holes 15 are equipped with support shafts, and two ends of each support shaft are equipped in the transverse elongated grooves 11 on the U-shaped bracket 12. The rollers are arranged at the two ends of the supporting shaft and matched with the transverse long grooves 11.
The second side switching system comprises four vacuum arc-extinguishing chambers and a set of second side switching operation mechanism for driving the four vacuum arc-extinguishing chambers to open and close. The second side switching operation mechanism comprises a U-shaped bracket 3 and a U-shaped movable piece 7. As shown in fig. 5, the U-shaped bracket 3 of the second side switching operation mechanism is provided with four pairs of vertical sliding grooves 1 and two pairs of horizontal elongated grooves 2. As shown in fig. 6, the U-shaped movable member 7 of the second side switching operation mechanism has four pairs of guide rail grooves 5 thereon to match with four pairs of vertical sliding grooves 1 on the U-shaped bracket 3 of fig. 5, two pairs of through holes 6 are provided on the U-shaped movable member 7, the two pairs of through holes 6 match with two pairs of horizontal long grooves 2 on the U-shaped bracket of fig. 5, a support shaft is fitted in the through hole 6, and both ends of the support shaft are fitted in the horizontal long grooves 2 on the U-shaped bracket. The two ends of the supporting shaft are provided with rollers which are matched with the transverse long grooves 2.
And the electromagnetic driving mechanism synchronously drives the first side coil switching operation mechanism and the second side coil switching operation mechanism. Specifically, the electromagnetic driving mechanism is connected with the U-shaped element 16 of the first side switching operation mechanism and the U-shaped element 7 of the second side switching operation mechanism through a crank-type transmission element. Referring to fig. 13 and 14, the cranked drive includes a swing arm mounting shaft 19, a first swing arm 18, a second swing arm 9, and a third swing arm 17. The inner side walls of the U-shaped support 12 of the first side switching operation mechanism and the U-shaped support 3 of the second side switching operation mechanism are respectively provided with a swing arm installation shaft installation hole, the two swing arm installation shaft installation holes are transversely aligned, and a swing arm installation shaft 19 is rotatably assembled in the two swing arm installation shaft installation holes. The first swing arm 18 is arranged in the middle of the swing arm mounting shaft 19, and the swing end of the first swing arm 18 is hinged with a driving rod of the electromagnetic driving mechanism; the second swing arm 9 and the third swing arm 17 are respectively installed at two ends of the swing arm installation shaft 19, and the swing end of the second swing arm 9 and the swing end of the third swing arm 17 are respectively hinged with the U-shaped moving piece 7 of the second side switching operation mechanism and the U-shaped moving piece 16 of the first side switching operation mechanism.
The specific driving mode is that the electromagnetic mechanism converts vertical motion into rotary motion of a swing arm mounting shaft through a first swing arm, and the swing arm mounting shaft converts the rotary motion into synchronous linear motion of a U-shaped moving piece of the second side switching operation mechanism and a U-shaped moving piece of the first side switching operation mechanism through a second swing arm and a third swing arm.
The high-level section and the low-level section of the guide rail groove on the U-shaped movable piece are different in length, so that each vacuum arc-extinguishing chamber can realize required time sequence action, and each vacuum arc-extinguishing chamber respectively performs corresponding time sequence opening and closing actions when the electromagnetic mechanism acts once.
Specifically, taking a phase as an example, the first side switching system of each phase comprises three vacuum arc-extinguishing chambers, the second side switching system of each phase comprises four vacuum arc-extinguishing chambers, and the vacuum arc-extinguishing chambers are vacuum tubes with moving and static contacts inside, so that the reliability is high, and arc extinguishing can be effectively ensured; the electromagnetic mechanism drives the vacuum arc-extinguishing chambers to be opened and closed through the switching operation mechanism 7, and then the connection mode of the coils is switched.
First, a second-side switching system will be described, taking one phase as an example, the second-side switching system of each phase includes four vacuum interrupters, as shown in fig. 8, a first low-voltage parallel vacuum interrupter (Kd 1), a low-voltage series vacuum interrupter (Kdc) connected in series with a transition resistor, a low-voltage series vacuum interrupter (Kdg), and a second low-voltage parallel vacuum interrupter (Kd 2) from left to right.
When the low-voltage coil is in a serial state, the low-voltage series vacuum arc-extinguishing chambers and the low-voltage series vacuum arc-extinguishing chambers which are connected in series with the transition resistors are switched on, the first low-voltage parallel vacuum arc-extinguishing chamber and the second low-voltage parallel vacuum arc-extinguishing chamber are switched off, the driving mechanism converts the motion direction into the transverse direction through the connecting lever, the U-shaped movable part and the U-shaped support move relatively, the low-voltage series vacuum arc-extinguishing chambers and the low-voltage series vacuum arc-extinguishing chambers which are connected in series with the transition resistors are switched off, the first low-voltage parallel vacuum arc-extinguishing chambers and the second low-voltage parallel vacuum arc-extinguishing chambers are switched on, the low-voltage coil is converted into a parallel structure by the serial structure, the permanent magnetic mechanism drives the second:
the low-voltage series vacuum arc-extinguishing chamber is opened;
the first low-voltage parallel vacuum arc-extinguishing chamber and the second low-voltage parallel vacuum arc-extinguishing chamber are switched on;
and a low-voltage series vacuum arc-extinguishing chamber brake is connected in series with a transition resistor to complete conversion.
In the process that the low-voltage coil is converted into a series structure from a parallel structure, the permanent magnet mechanism drives the second side switching operation mechanism to reversely act, and the second side switching operation mechanism ensures that each vacuum arc extinguish chamber acts according to the following time sequence:
switching on a low-voltage series vacuum arc-extinguishing chamber connected with a transition resistor in series;
the first low-voltage parallel vacuum arc-extinguishing chamber and the second low-voltage parallel vacuum arc-extinguishing chamber are opened;
and switching on the low-voltage series vacuum arc extinguish chamber to complete conversion.
Specifically, as shown in fig. 1 and 2, fig. 1 is a coil series structure (Kdc, Kdg on; Kd1, Kd2 off), that is, the transformer is in a low-capacity state; FIG. 2 shows the parallel connection of the coils (Kd 1, Kd2 on; Kdc, Kdg off), i.e. the transformer is in a high capacity state; the Kd1 and Kd2 are both low-voltage parallel vacuum arc-extinguishing chambers, Kdg is a low-voltage series vacuum arc-extinguishing chamber, and Kdc is a low-voltage transition vacuum arc-extinguishing chamber connected in series with a transition resistor.
In the process of converting the coil from a series structure to a parallel structure, the electromagnetic mechanism drives the second side switching operation mechanism to move forwards, and the special structure of the second side switching operation mechanism ensures that each vacuum arc extinguish chamber moves according to the following time sequence:
the vacuum arc extinguish chamber Kdg is opened, the vacuum arc extinguish chamber Kd1, the vacuum arc extinguish chamber Kd2 is closed, the vacuum arc extinguish chamber Kdc is opened, the conversion is completed, and the low-voltage coil II and the low-voltage coil III are in a series structure;
on the contrary, when needing low pressure II section coils and III section coils to convert series structure into by parallel structure, electromagnetic mechanism drive second side switches operating device reverse action, and drive mechanism's special construction guarantees that each vacuum interrupter moves according to following chronogenesis: the vacuum arc extinguish chamber Kdc is switched on → the vacuum arc extinguish chamber Kd1, the vacuum arc extinguish chamber Kd2 is switched off → the vacuum arc extinguish chamber Kdg is switched on, and the conversion is completed.
A first side switching system for realizing star-delta conversion of the three-phase high-voltage coil; taking three phases as an example, the first side switching system of each phase includes three vacuum arc-extinguishing chambers, as shown in fig. 12, from left to right, there are a high-voltage transition vacuum arc-extinguishing chamber (Kgc) connected in series with a transition resistor, a first corner connection vacuum arc-extinguishing chamber (Kg 1), and a star connection vacuum arc-extinguishing chamber (Kgg); the high-voltage coil is in triangular connection when the first angle connection vacuum arc-extinguishing chamber is switched on and the star connection vacuum arc-extinguishing chamber Kgg is switched off, and the high-voltage coil is in star connection when the star connection vacuum arc-extinguishing chamber is switched on and the first angle connection vacuum arc-extinguishing chamber is switched off.
When the high-voltage coil is in a star connection structure, a first corner is connected with a vacuum arc extinguish chamber to be opened, and a star connection vacuum arc extinguish chamber and a high-voltage transition vacuum arc extinguish chamber are closed;
in the process that the high-voltage coil is converted from star connection to angle connection, the electromagnetic mechanism drives the first switching operation mechanism to move in the forward direction, and the first switching operation mechanism ensures that each vacuum arc extinguish chamber moves according to the following time sequence:
star connection vacuum arc extinguish chamber brake opening;
the first corner is connected with a vacuum arc extinguish chamber to switch on;
and a high-voltage transition vacuum arc-extinguishing chamber brake is connected in series with a transition resistor to complete conversion.
In the process that the high-voltage coil is converted from angular connection to star connection, the electromagnetic mechanism drives the first switching operation mechanism to reversely act, and the first switching operation mechanism ensures that each vacuum arc extinguish chamber acts according to the following time sequence:
switching on a high-voltage transition vacuum arc-extinguishing chamber connected with a transition resistor in series;
the first corner is connected with the brake of the vacuum arc extinguish chamber;
and switching on the star connection vacuum arc extinguish chamber to complete conversion.
Specifically, as shown in fig. 3 and 4, fig. 3 is a schematic diagram of a star connection structure (Kgg, Kgc closing; Kg1 opening), that is, the transformer is in a small-capacity state; FIG. 4 is a schematic view of the angle joint structure (Kg 1 closing; Kgg, Kgc opening), i.e. the transformer is in a large capacity state; kgg is a star-connected vacuum arc-extinguishing chamber, Kg1 is a first angle-connected vacuum arc-extinguishing chamber, Kgc is a high-voltage transition vacuum arc-extinguishing chamber, and a transition resistor is connected in series.
In the process of switching the high-voltage coil from star connection to angular connection, the electromagnetic mechanism drives the first switching operation mechanism to move in the forward direction, and the special structure of the first switching operation mechanism ensures that each vacuum arc-extinguishing chamber moves according to the following time sequence:
the vacuum arc extinguish chamber Kgg is opened, the vacuum arc extinguish chamber Kg1 is closed, the vacuum arc extinguish chamber Kgc is opened, and the conversion is completed, wherein the corner joint is adopted.
On the contrary, when the high-voltage coil is required to be switched from angular connection to star connection, the electromagnetic mechanism drives the first switching operation mechanism to reversely act, and the special structure of the first switching operation mechanism ensures that each vacuum arc extinguish chamber acts according to the following time sequence: switching on a vacuum arc extinguish chamber Kgc → switching off a vacuum arc extinguish chamber Kg1 → switching on the vacuum arc extinguish chamber Kgg, and completing the conversion.
The opening and closing process of each vacuum arc-extinguishing chamber on the high-voltage side is shown in fig. 7, and when the electromagnetic mechanism acts once, each vacuum arc-extinguishing chamber has a time-sequential switch closed once. The operation time of each vacuum arc-extinguishing chamber is divided into T1, T2, T3 and T4. The transformer is in a small-capacity state, the high-voltage side windings are connected in a star connection, at the moment, the vacuum arc-extinguishing chamber Kgg, the vacuum arc-extinguishing chamber Kgc are in a closed state, and the vacuum arc-extinguishing chamber Kg1 is in an open state; when T1 occurs, the vacuum interrupter Kgg is open, the vacuum interrupter Kg1 is open, and the vacuum interrupter Kgc is closed; when T3, vacuum interrupter Kg1 is closed, vacuum interrupter Kgg is in an open state, and vacuum interrupter Kgc is in a closed state; at T4, the vacuum arc-extinguishing chamber Kgc is disconnected, the vacuum arc-extinguishing chamber Kgg is in a disconnected state, the vacuum arc-extinguishing chamber Kg1 is in a closed state, at this time, three-phase high-voltage windings of the transformer are in triangular connection, namely, the conversion from star connection to angle connection is completed, the time sequence action of each vacuum arc-extinguishing chamber is realized by the difference of the lengths of a high-level section and a low-level section which are connected through a transmission mechanism, if the length of the section is short, the time sequence action is in the front, and if the length of the section.
When the star-delta conversion is completed on the high-voltage side, the low-voltage side also performs the conversion from series to parallel, specifically, as shown in fig. 1 and 2, the circuit diagram of one phase of the low-voltage side is shown, fig. 1 is a diagram in a case of small capacity, and fig. 2 is a diagram in a case of large capacity. The opening and closing processes of each vacuum arc-extinguishing chamber on the low-voltage side are shown in fig. 7, and when the permanent magnet mechanism acts once, each vacuum arc-extinguishing chamber is closed once with a time-sequence switch. The transformer is in an initial state under a small capacity, the vacuum arc-extinguishing chamber Kdc and the vacuum arc-extinguishing chamber Kdg are in a closed state, the vacuum arc-extinguishing chamber Kd1 and the vacuum arc-extinguishing chamber Kd2 are in an open state, and three sections of coils of the low-voltage side winding are connected in series; when T1 is detected, the vacuum interrupter Kdg is open, the vacuum interrupter Kdc is closed, and the vacuum interrupter Kd1 and the vacuum interrupter Kd2 are open; when T2, the vacuum arc-extinguishing chamber Kd1 and the vacuum arc-extinguishing chamber Kd2 are closed, the vacuum arc-extinguishing chamber Kdg is in an open state, and the vacuum arc-extinguishing chamber Kdc is in a closed state; when T4 is reached, the vacuum interrupter Kd c is open, the vacuum interrupter Kd1 and the vacuum interrupter Kd2 are closed, and the vacuum interrupter Kdg is open, and at this time, the two coils of the low-voltage side winding are connected in parallel and then connected in series with the other coil, that is, the conversion from series connection to parallel connection is completed.
When Dy (Yz) conversion capacity adjustment is adopted, the first side switching system comprises four vacuum arc-extinguishing chambers and a set of first switching operation mechanism for driving the four vacuum arc-extinguishing chambers to be switched on and switched off. The second switching system comprises four vacuum arc-extinguishing chambers and a set of second side switching operation mechanism for driving the four vacuum arc-extinguishing chambers to be switched on and off.
Taking three phases as an example, the first side switching system of each phase comprises four vacuum arc-extinguishing chambers, namely a high-voltage transition vacuum arc-extinguishing chamber (Kgc), a vacuum arc-extinguishing chamber (Kg 1), a vacuum arc-extinguishing chamber (Kgg) and a vacuum arc-extinguishing chamber (Kd 3) which are connected in series with a transition resistor.
In the process of converting the high-voltage coil from small capacity to large capacity, the electromagnetic mechanism drives the first switching operation mechanism to move in the forward direction, and the special structure of the first switching operation mechanism ensures that each vacuum arc extinguish chamber moves according to the following time sequence: the vacuum arc-extinguishing chamber Kgg is opened → the vacuum arc-extinguishing chamber Kg1 is closed → the vacuum arc-extinguishing chamber Kgc is opened, and the conversion is completed.
On the contrary, the electromagnetic mechanism drives the first switching operation mechanism to reversely act, and the special structure of the first switching operation mechanism ensures that each vacuum arc extinguish chamber acts according to the following time sequence: switching on a vacuum arc extinguish chamber Kgc → switching off a vacuum arc extinguish chamber Kg1 → switching on the vacuum arc extinguish chamber Kgg, and completing the conversion.
The second switching system of each phase comprises a vacuum interrupter (Kd 1), a vacuum interrupter (Kdc) connected in series with a transition resistor, a vacuum interrupter (Kdg) and a vacuum interrupter (Kd 2).
When the coil is changed from small capacity to large capacity, the electromagnetic mechanism drives the second side switching operation mechanism to move in the forward direction, and the special structure of the second side switching operation mechanism ensures that each vacuum arc extinguish chamber moves according to the following time sequence:
the vacuum arc-extinguishing chamber Kdg is opened → the vacuum arc-extinguishing chamber Kd1, the vacuum arc-extinguishing chamber Kd2 and the vacuum arc-extinguishing chamber Kd3 are closed → the vacuum arc-extinguishing chamber Kdc is opened, and the conversion is completed;
on the contrary, the electromagnetic mechanism drives the second side switching operation mechanism to reversely act, and the special structure of the transmission mechanism ensures that each vacuum arc extinguish chamber acts according to the following time sequence: the vacuum arc extinguish chamber Kdc is switched on → the vacuum arc extinguish chamber Kd1, the vacuum arc extinguish chamber Kd2 and the vacuum arc extinguish chamber Kd3 are switched off → the vacuum arc extinguish chamber Kdg is switched on, and the conversion is completed.
When Dy (Dy) conversion capacity adjustment is adopted, the first side switching system comprises four vacuum arc-extinguishing chambers and a set of first switching operation mechanism for driving the four vacuum arc-extinguishing chambers to be switched on and off. The second switching system comprises four vacuum arc-extinguishing chambers and a set of second side switching operation mechanism for driving the four vacuum arc-extinguishing chambers to be switched on and off.
Taking three phases as an example, the first side switching system of each phase comprises four vacuum arc-extinguishing chambers, namely a high-voltage transition vacuum arc-extinguishing chamber (Kgc), a vacuum arc-extinguishing chamber (Kg 1), a vacuum arc-extinguishing chamber (Kgg) and a vacuum arc-extinguishing chamber (Kg 2) which are connected with a transition resistor in series.
In the process of converting the high-voltage coil from small capacity to large capacity, the electromagnetic mechanism drives the first switching operation mechanism to move in the forward direction, and the special structure of the first switching operation mechanism ensures that each vacuum arc extinguish chamber moves according to the following time sequence: the vacuum arc-extinguishing chamber Kgg is opened → the vacuum arc-extinguishing chamber Kg1, the vacuum arc-extinguishing chamber Kg2 is closed → the vacuum arc-extinguishing chamber Kgc is opened, and the conversion is completed.
On the contrary, the electromagnetic mechanism drives the first switching operation mechanism to reversely act, and the special structure of the first switching operation mechanism ensures that each vacuum arc extinguish chamber acts according to the following time sequence: switching on a vacuum arc extinguish chamber Kgc → switching off a vacuum arc extinguish chamber Kg1, switching off a vacuum arc extinguish chamber Kg2 → switching on a vacuum arc extinguish chamber Kgg, and completing the conversion.
The second switching system of each phase comprises a vacuum interrupter (Kd 1), a vacuum interrupter (Kdc) connected in series with a transition resistor, a vacuum interrupter (Kdg) and a vacuum interrupter (Kd 2).
In the process of converting the coil from small capacity to large capacity, the electromagnetic mechanism drives the second side switching operation mechanism to move in the forward direction, and the special structure of the second side switching operation mechanism ensures that each vacuum arc extinguish chamber moves according to the following time sequence:
the vacuum arc-extinguishing chamber Kdg is opened, the vacuum arc-extinguishing chamber Kd1, the vacuum arc-extinguishing chamber Kd2 is closed, the vacuum arc-extinguishing chamber Kdc is opened, and the conversion is completed;
on the contrary, the electromagnetic mechanism drives the second side switching operation mechanism to reversely act, and the special structure of the transmission mechanism ensures that each vacuum arc extinguish chamber acts according to the following time sequence: the vacuum arc extinguish chamber Kdc is switched on → the vacuum arc extinguish chamber Kd1, the vacuum arc extinguish chamber Kd2 is switched off → the vacuum arc extinguish chamber Kdg is switched on, and the conversion is completed.
According to the invention, the vacuum arc-extinguishing chamber is independently arranged in each contact connection in the high-low voltage contact system, so that the arc-extinguishing performance is good, the service life is long, the maintenance is free, the reliability is increased, and the capacity adjustment is realized under the condition of no power failure; compared with a motor spring system, the invention has the advantages of simple structure, more stable and reliable operation, short conversion action completion time and obvious elimination of the phenomenon of high failure rate.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. A single-term capacity regulating switch for a capacity regulating transformer comprises a first side switching system, a second side switching system and an electromagnetic driving mechanism, wherein the three single-term capacity regulating switches are used in one capacity regulating transformer, the electromagnetic driving mechanism is used for driving the first side switching system and the second side switching system to act, the first side switching system comprises a first group of vacuum arc-extinguishing chambers for connection and conversion of a high-voltage winding coil and a first side switching operating mechanism for driving the vacuum arc-extinguishing chambers to be switched on and off, and the second side switching system comprises a second group of vacuum arc-extinguishing chambers for connection and conversion of a low-voltage winding coil and a second side switching operating mechanism for driving the vacuum arc-extinguishing chambers to be switched on and off;
the device is characterized in that the first side switching operation mechanism and the second side switching operation mechanism respectively comprise a fixedly arranged U-shaped bracket and a U-shaped movable piece arranged in the U-shaped bracket in a sliding way;
at least one pair of transverse long grooves for supporting the U-shaped moving part and allowing the U-shaped moving part to linearly slide in a reciprocating manner are symmetrically arranged on two side walls of the U-shaped support, through holes corresponding to the transverse long grooves on the U-shaped support are symmetrically arranged on the two side walls of the U-shaped moving part, support shafts are assembled in the through holes, and two ends of each support shaft penetrate through the transverse long grooves;
vertical sliding grooves which are used for transversely positioning the switching-on and switching-off pull rods of the vacuum arc extinguish chambers and allowing the switching-on and switching-off pull rods to vertically move up and down are symmetrically arranged on two side walls of the U-shaped supports of the first side switching operation mechanism and the second side switching operation mechanism respectively, and guide rail grooves which are used for driving the switching-on and switching-off pull rods of the vacuum arc extinguish chambers to vertically move up and down are symmetrically arranged on two side walls of the U-shaped movable pieces of the first side switching operation mechanism and the second side switching operation mechanism;
the movable conducting rods of the vacuum arc-extinguishing chambers are respectively connected with the opening and closing pull rods in an insulating mode, the end parts of the opening and closing pull rods are provided with transformation shafts, and the two ends of the transformation shafts at the end parts of the opening and closing pull rods of each vacuum arc-extinguishing chamber penetrate through a pair of guide rail grooves corresponding to the U-shaped movable part and then are assembled in a pair of vertical sliding grooves corresponding to the U-shaped support;
the guide rail groove comprises a low section and a high section, the low section is used for driving the vacuum arc extinguish chamber to be opened, the high section is used for driving the vacuum arc extinguish chamber to be closed, and the high section and the low section are in transitional connection through a middle inclined section.
2. The monomial capacitance-regulating switch for the capacitance-regulating transformer according to claim 1, wherein the total length of three sections of each guide rail groove is equal.
3. The monomial capacity regulating switch for the capacity regulating transformer as claimed in claim 1, wherein rollers respectively arranged in the guide rail groove and the vertical sliding groove are mounted at two ends of the transformation shaft.
4. The monomial capacitance-regulating switch for the capacitance-regulating transformer as claimed in claim 1, wherein rollers are mounted at two ends of the supporting shaft, and the rollers at two ends of the supporting shaft are arranged in the transverse long grooves on the U-shaped bracket to move horizontally.
5. The monomial capacitance-regulating switch for the capacitance-regulating transformer according to claim 1, wherein the capacitance-regulating switch is used for a capacitance-regulating transformer for dy (yy) conversion, the vacuum arc-extinguishing chambers in the first-side switching system are respectively a first corner-connected vacuum arc-extinguishing chamber, a star-connected vacuum arc-extinguishing chamber, and a high-voltage transition vacuum arc-extinguishing chamber connected with a transition resistor in series, a first side of a first guide rail groove corresponding to the high-voltage transition vacuum arc-extinguishing chamber is a high-level section, a second side of the first guide rail groove corresponding to the first corner-connected vacuum arc-extinguishing chamber is a low-level section, and the second side of the second guide rail groove corresponding to the first corner-connected vacuum arc-extinguishing; the high section of a third guide rail groove corresponding to the star connection vacuum arc extinguish chamber is positioned at the first side, and the low section is positioned at the second side; the high section of the first guide rail groove is equal to the low section of the third guide rail groove in length, the high section of the third guide rail groove is equal to the low section of the first guide rail groove, and the low section of the second guide rail groove is equal to the high section;
the vacuum arc-extinguishing chambers in the second side switching system are respectively a low-voltage first parallel vacuum arc-extinguishing chamber, a low-voltage second parallel vacuum arc-extinguishing chamber, a low-voltage series vacuum arc-extinguishing chamber and a low-voltage transition vacuum arc-extinguishing chamber which is connected with a transition resistor in series, wherein the first side of a fourth guide rail groove corresponding to the low-voltage first parallel vacuum arc-extinguishing chamber is a low-level section, and the second side of the fourth guide rail groove is a high-level section; the first side of a fifth guide rail groove corresponding to the low-voltage series vacuum arc-extinguishing chamber is a high-level section, and the second side of the fifth guide rail groove is a low-level section; the first side of a sixth guide rail groove corresponding to a low-voltage transition vacuum arc-extinguishing chamber connected with a transition resistor in series is a high-level section, and the second side of the sixth guide rail groove is a low-level section; the first side of the seventh guide rail groove corresponding to the low-voltage second parallel vacuum arc-extinguishing chamber is a low-level section, and the second side of the seventh guide rail groove is a high-level section; the high section and the low section of the fourth guide rail groove and the seventh guide rail groove are equal in length, the high section of the fifth guide rail groove is equal to the low section of the sixth guide rail groove in length and is longer than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove, and the low section of the fifth guide rail groove is equal to the high section of the sixth guide rail groove in length and is shorter than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove.
6. The monotherapy capacity-regulating switch for the capacity-regulating transformer of claim 1, wherein the capacity-regulating switch is used for a capacity-regulating transformer for dy (dy) conversion, the vacuum arc-extinguishing chambers in the first side switching system are respectively a high-voltage first parallel vacuum arc-extinguishing chamber, a high-voltage series vacuum arc-extinguishing chamber, a high-voltage transition vacuum arc-extinguishing chamber connected in series with a transition resistor, and a high-voltage second parallel vacuum arc-extinguishing chamber, a first side of a first guide rail groove corresponding to the high-voltage transition vacuum arc-extinguishing chamber connected in series with the transition resistor is a high-order section, a second side of the first guide rail groove is a low-order section, and a first side of a second guide rail groove corresponding to the high-voltage first parallel vacuum arc-extinguishing chamber is a low-order section; the high section of a third guide rail groove corresponding to the high-voltage series vacuum arc-extinguishing chamber is positioned on the first side, and the low section is positioned on the second side; the high-level section of the first guide rail groove is equal to the low-level section of the third guide rail groove in length, the high-level section of the third guide rail groove is equal to the low-level section of the first guide rail groove, the low-level section of the second guide rail groove is the same as the high-level section, the eighth guide rail groove corresponds to the high-voltage second parallel vacuum arc-extinguishing chamber, the first side of the eighth guide rail groove is the low-level section, the second side of the eighth guide rail groove is the high-level section, and the high-level section is equal to the low-level section;
the vacuum arc-extinguishing chambers in the second side switching system are respectively a low-voltage first parallel vacuum arc-extinguishing chamber, a low-voltage second parallel vacuum arc-extinguishing chamber, a low-voltage series vacuum arc-extinguishing chamber and a low-voltage transition vacuum arc-extinguishing chamber which is connected with a transition resistor in series, wherein the first side of a fourth guide rail groove corresponding to the low-voltage first parallel vacuum arc-extinguishing chamber is a low-level section, and the second side of the fourth guide rail groove is a high-level section; the first side of a fifth guide rail groove corresponding to the low-voltage series vacuum arc-extinguishing chamber is a high-level section, and the second side of the fifth guide rail groove is a low-level section; the first side of a sixth guide rail groove corresponding to a low-voltage transition vacuum arc-extinguishing chamber connected with a transition resistor in series is a high-level section, and the second side of the sixth guide rail groove is a low-level section; the first side of the seventh guide rail groove corresponding to the low-voltage second parallel vacuum arc-extinguishing chamber is a low-level section, and the second side of the seventh guide rail groove is a high-level section; the high section and the low section of the fourth guide rail groove and the seventh guide rail groove are equal in length, the high section of the fifth guide rail groove is equal to the low section of the sixth guide rail groove in length and is longer than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove, and the low section of the fifth guide rail groove is equal to the high section of the sixth guide rail groove in length and is shorter than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove.
7. The monotherapy capacity regulating switch for the capacity regulating transformer of claim 1, wherein the capacity regulating switch is used for a capacity regulating transformer for dy (yz) conversion, the vacuum arc-extinguishing chambers in the first side switching system are respectively an angle vacuum arc-extinguishing chamber, a star vacuum arc-extinguishing chamber, a high-voltage transition vacuum arc-extinguishing chamber connected in series with a transition resistor, and a low-voltage third parallel vacuum arc-extinguishing chamber, the first side of the first guide rail groove corresponding to the high-voltage transition vacuum arc-extinguishing chamber is a high-level section, the second side of the first guide rail groove corresponding to the angle vacuum arc-extinguishing chamber is a low-level section, and the second side of the second guide rail groove corresponding to the angle vacuum arc-extinguishing chamber is a high-level section; the high section of a third guide rail groove corresponding to the star connection vacuum arc extinguish chamber is positioned at the first side, and the low section is positioned at the second side; the high-level section of the first guide rail groove is equal to the low-level section of the third guide rail groove in length, the high-level section of the third guide rail groove is equal to the high-level section of the first guide rail groove, the low-level section of the second guide rail groove is the same as the high-level section, the eighth guide rail groove corresponds to a low-voltage third parallel vacuum arc-extinguishing chamber, the first side of the eighth guide rail groove is the low-level section, the second side of the eighth guide rail groove is the high-level section, and the high-level section is equal to the low-level section;
the vacuum arc-extinguishing chambers in the second side switching system are respectively a low-voltage first parallel vacuum arc-extinguishing chamber, a low-voltage second parallel vacuum arc-extinguishing chamber, a low-voltage series vacuum arc-extinguishing chamber and a low-voltage transition vacuum arc-extinguishing chamber which is connected with a transition resistor in series, wherein the first side of a fourth guide rail groove corresponding to the low-voltage first parallel vacuum arc-extinguishing chamber is a low-level section, and the second side of the fourth guide rail groove is a high-level section; the first side of a fifth guide rail groove corresponding to the low-voltage series vacuum arc-extinguishing chamber is a high-level section, and the second side of the fifth guide rail groove is a low-level section; the first side of a sixth guide rail groove corresponding to a low-voltage transition vacuum arc-extinguishing chamber connected with a transition resistor in series is a high-level section, and the second side of the sixth guide rail groove is a low-level section; the first side of the seventh guide rail groove corresponding to the low-voltage second parallel vacuum arc-extinguishing chamber is a low-level section, and the second side of the seventh guide rail groove is a high-level section; the high section and the low section of the fourth guide rail groove and the seventh guide rail groove are equal in length, the high section of the fifth guide rail groove is equal to the low section of the sixth guide rail groove in length and is longer than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove, and the low section of the fifth guide rail groove is equal to the high section of the sixth guide rail groove in length and is shorter than the high section and the low section of the fourth guide rail groove and the seventh guide rail groove.
8. The monomial capacitance-regulating switch for the capacitance-regulating transformer according to claim 1, wherein the electromagnetic driving mechanism is connected to the operating plate of the first-side switching operating mechanism and the operating plate of the second-side switching operating mechanism through a crank-type transmission member, respectively.
9. The monomial capacitance-regulating switch for the capacitance-regulating transformer according to claim 8, wherein the crank-type transmission comprises a swing arm mounting shaft, a first swing arm, a second swing arm, a third swing arm; the first swing arm is arranged in the middle of the swing arm mounting shaft, and the swing end of the first swing arm is hinged with the driving rod of the electromagnetic driving mechanism; the second swing arm and the third swing arm are respectively installed at two ends of the swing arm installation shaft, and the swing end of the second swing arm and the swing end of the third swing arm are respectively hinged with the operating plate of the second side switching operating mechanism and the operating plate of the first side switching operating mechanism.
10. The monotherapy capacity regulating switch for a capacity regulating transformer of claim 9, wherein the inner side walls of the chute of the first switching operation mechanism and the chute of the second side switching operation mechanism are respectively provided with a swing arm mounting shaft mounting hole, the two swing arm mounting shaft mounting holes are transversely aligned, and the swing arm mounting shaft is rotatably assembled in the two swing arm mounting shaft mounting holes.
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| CN105826098B (en) * | 2016-04-20 | 2018-08-14 | 浙江宝威电气有限公司 | The capacitance switch of capacitance-adjustable transformer for anti-three-phase imbalance |
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