CN202931209U - Polarity reversal voltage generation device based on DC high-voltage cascade generation circuit - Google Patents
Polarity reversal voltage generation device based on DC high-voltage cascade generation circuit Download PDFInfo
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- CN202931209U CN202931209U CN 201220681820 CN201220681820U CN202931209U CN 202931209 U CN202931209 U CN 202931209U CN 201220681820 CN201220681820 CN 201220681820 CN 201220681820 U CN201220681820 U CN 201220681820U CN 202931209 U CN202931209 U CN 202931209U
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Abstract
The utility model relates to a polarity reversal voltage generation device based on a DC high-voltage cascade generation circuit and aims to solve problems that a conventional polarity reversal voltage generation device is hard to generate high voltages and is high in cost. After voltage regulation of a single-phase alternating current, the single-phase alternating current is input to a boosting transformer so as to generate a high-voltage alternating current. The high-voltage alternating current is respectively connected to a positive polarity DC high-voltage cascade generation unit and a negative polarity high-voltage cascade generation unit to generate a DC voltage with a positive polarity and a DC voltage with a negative polarity. Through a single-pole double-throw switch and through selection of a connection mode between the switch and the positive polarity DC high-voltage cascade generation unit or the negative polarity high-voltage cascade generation unit, a voltage polarity of a connection test product is selected. After the voltage polarity is selected, the voltage is connected to one end of the test product through a protection resistor, and the other end of the test product is connected with the ground, thereby applying the voltage to the two ends of the test product. The polarity reversal voltage generation device is used for a converter transformer.
Description
Technical field
The utility model relates to a kind of polarity inversion voltage generation circuit, particularly a kind of polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating.
Background technology
Along with the sustainable growth of national economy, energy demand is improved day by day, the high voltage long distance power transmission has become the strategic issue that affects economic development.Office of national energy leading group classifies the extra-high voltage grid construction as the main points of working energy.In the ultra high voltage long-distance transmission line, direct current transportation has obvious advantage, so direct current transportation will play more and more consequence in electric power transmission network.Converter transformer is vital key equipment in DC transmission system, is also the nucleus equipment that the AC and DC transmission system connects two ends current conversion station and Inverter Station.Due to the particularity of operating condition, driving voltage type and the common power transformer of valve winding in converter transformer have very big difference: except bearing alternating voltage, lightning impulse and switching overvoltage, also bear the voltage effects such as polarity inversion.In direct current system trend Umklapp process, the valve side winding voltage of sending end converter transformer jumps to the identical another kind of stable state of the opposite amplitude of polarity by a kind of stable state, and polarity inversion namely occurs.A transition process from from a kind of distribution to another kind of state also will occur in the electric field in the oil-paper combination insulation of converter transformer end.the interface shape electric charge at different medium interface this moment place will reduce and oppositely accumulation, and this process is chronic, much larger than the polarity inversion time (being generally a few tens of milliseconds) of system, therefore moment oil reverses, paper will bear the acting in conjunction of space charge induced voltage and counter-rotating moment applied voltage capacitive component, the result of this effect is strengthened in oil mutually, and mutually weaken in insulating paper, and because the relative dielectric constant of oil is less, in the moment of counter-rotating, born most applied voltage in oil, so appearance potential is concentrated, this will cause in oil generation office to be put even puncturing.This is unexistent phenomenon in traditional power transformer, is also the difficult point in the converter transformer insulating Design.The insulation fault of many transformers is that experiment or voltage in service occurs when carrying out polarity inversion.As seen study the paper oil insulation characteristic under the effect of polarity inversion voltage, for the design of converter transformer insulation system, very important meaning is arranged.Therefore need a kind of converter transformer polarity inversion experiment power supply badly.Existing polarity inversion voltage generator adopts single-phase alternating current after step-up transformer boosts, thereby by half-wave rectifying circuit respectively to the capacitor device of two series connection charge output cathode or negative polarity high voltage direct current, this circuit shortcoming is that the operating voltage of transformer, rectification silicon stack, capacitor device is higher, when higher grade of required voltage, specification requirement and production cost were all higher.
The utility model content
The purpose of this utility model is to be difficult to produce high voltage and the higher problem of cost in order to solve existing polarity inversion voltage generation circuit, and the utility model provides a kind of polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating.
A kind of polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating of the present utility model, it comprises voltage regulator, step-up transformer, positive polarity high direct voltage tandem circuit for generating, negative polarity high direct voltage tandem circuit for generating, single-pole double-throw switch (SPDT) and protective resistance;
the two ends of the primary coil of voltage regulator are used for the input single-phase ac signal, one end of the secondary coil of voltage regulator is connected with an end of the primary coil of step-up transformer, the adjustable end of the secondary coil of voltage regulator is connected with the other end of the primary coil of step-up transformer, one end of the secondary coil of step-up transformer simultaneously and the signal of positive polarity high direct voltage tandem circuit for generating input A end be connected signal input A with negative polarity high direct voltage tandem circuit for generating and hold and be connected, the other end of the secondary coil of step-up transformer is inputted the B end with the signal of positive polarity high direct voltage tandem circuit for generating simultaneously, signal input B end and the power supply ground connection of negative polarity high direct voltage tandem circuit for generating, what the DC signal output C of positive polarity high direct voltage tandem circuit for generating end connected single-pole double-throw switch (SPDT) often opens fixed contact, the DC signal output C end of negative polarity high direct voltage tandem circuit for generating connects the normally closed fixed contact of single-pole double-throw switch (SPDT), the moving contact of single-pole double-throw switch (SPDT) connects an end of protective resistance, the two ends of series connection test product between the other end of this protective resistance and power supply ground.
The utility model has the advantage of, produce high voltage direct current by high direct voltage string utmost point circuit for generating, when output dc voltage is U
outAnd when the progression of tandem voltage generating circuit is n, the high-pressure side one end ground connection of transformer, other end insulation against ground requires to be U
out/ 2n, the capacitor of high direct voltage tandem circuit for generating and the operating voltage of high voltage silicon stack are U to the maximum
out/ n, and in existing halfwave rectifier voltage-multiplying circuit, the high-pressure side insulation against ground grade of transformer is up to U
out, the operating voltage of high voltage silicon stack and capacitor is U to the maximum
out/ 2.The utility model has reduced the insulating requirements to transformer and high voltage silicon stack, solved original halfwave rectifier voltage-multiplying circuit higher and can't produce the problem of high voltage due to the operating voltage of step-up transformer, high voltage silicon stack, capacitor, improve the direct voltage grade, and reduced cost.
Description of drawings
Fig. 1 is the electrical connection schematic diagram of the polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating described in the utility model.
Fig. 2 is the electrical structure schematic diagram of the described positive polarity high direct voltage of embodiment three tandem circuit for generating.
Fig. 3 is the electrical structure schematic diagram of the described negative polarity high direct voltage of embodiment six tandem circuit for generating.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, the described polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating of present embodiment, it comprises voltage regulator 1, step-up transformer 2, positive polarity high direct voltage tandem circuit for generating 3, negative polarity high direct voltage tandem circuit for generating 4, single-pole double-throw switch (SPDT) and protective resistance;
the two ends of the primary coil of voltage regulator 1 are used for the input single-phase ac signal, one end of the secondary coil of voltage regulator 1 is connected with an end of the primary coil of step-up transformer 2, the adjustable end of the secondary coil of voltage regulator 1 is connected with the other end of the primary coil of step-up transformer 2, one end of the secondary coil of step-up transformer 2 is connected with the signal input A end that the signal input A end of positive polarity high direct voltage tandem circuit for generating 3 is connected with negative polarity high direct voltage tandem circuit for generating simultaneously, the other end of the secondary coil of step-up transformer 2 is inputted the B end with the signal of positive polarity high direct voltage tandem circuit for generating 3 simultaneously, signal input B end and the power supply ground connection of negative polarity high direct voltage tandem circuit for generating 4, what the DC signal output C of positive polarity high direct voltage tandem circuit for generating 3 end connected single-pole double-throw switch (SPDT) often opens fixed contact, the DC signal output C end of negative polarity high direct voltage tandem circuit for generating 4 connects the normally closed fixed contact of single-pole double-throw switch (SPDT), the moving contact of single-pole double-throw switch (SPDT) connects an end of protective resistance, the two ends of series connection test product between the other end of this protective resistance and power supply ground.
Thereby produce high-voltage alternating by single-phase alternating current is input to step-up transformer after the voltage regulator pressure regulation, then high-voltage alternating is produced respectively the direct voltage of positive and negative polarity by positive polarity high direct voltage tandem circuit for generating 3 and negative polarity high direct voltage tandem circuit for generating 4.Hold the mode that is connected to select to access the polarity of voltage of test product by single-pole double-throw switch (SPDT) with the DC signal output C end of positive polarity high direct voltage tandem circuit for generating 3 or the DC signal output C of negative polarity high direct voltage tandem circuit for generating 4; the polarity of voltage selection is complete introduces test product one end by protective resistance with voltage; test product other end ground connection, thus voltage applied at test product two ends.
Embodiment two: present embodiment is the further restriction to the described polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating of embodiment one,
Described positive polarity high direct voltage tandem circuit for generating 3 is composed in series by N positive polarity dc high-voltage circuit 3-1, and N is the positive integer greater than 1.
When needs improve the direct voltage grade, realize by the progression that improves high direct voltage string utmost point circuit for generating.
Embodiment three: in conjunction with Fig. 2, present embodiment is described, present embodiment is the further restriction to the described polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating of embodiment two,
Described positive polarity high direct voltage tandem circuit for generating 3 is composed in series by 2 positive polarity dc high-voltage circuit 3-1.
Embodiment four: present embodiment is the further restriction to the described polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating of embodiment two or three,
Positive polarity dc high-voltage circuit 3-1 comprises two high voltage silicon stack D1, D2 and two capacitor C1, C2; The end of capacitor C1 is as an input of described circuit, the other end of capacitor C1 simultaneously with the anodic bonding of the negative electrode of a high voltage silicon stack D1 and another high voltage silicon stack D2 after as an output of described circuit, the negative electrode of described another high voltage silicon stack D2 is connected another output as described circuit with the end of capacitor C2, the other end of this capacitor C2 and the anodic bonding of a high voltage silicon stack D1 are as another input of described circuit.
Embodiment five: present embodiment is the further restriction to the described polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating of embodiment one,
Described negative polarity high direct voltage tandem circuit for generating 3 is composed in series by N negative polarity dc high-voltage circuit 4-1, and N is the positive integer greater than 1.
When needs improve the direct voltage grade, realize by the progression that improves high direct voltage string utmost point circuit for generating.
Embodiment six: in conjunction with Fig. 3, present embodiment is described, present embodiment is the further restriction to the described polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating of embodiment five,
Described negative polarity high direct voltage tandem circuit for generating 3 is composed in series by 2 negative polarity dc high-voltage circuit 4-1.
Embodiment seven: present embodiment is that negative polarity dc high-voltage circuit 4-1 comprises two high voltage silicon stack D3, D4 and two capacitor C3, C4 to the further restriction of the described polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating of embodiment five or six; The end of capacitor C3 is as an input of described circuit, the other end of capacitor C3 is connected afterwards an output as described circuit simultaneously with the anode of a high voltage silicon stack D3 and the negative electrode of high voltage silicon stack D4 of being connected, the anode of described another high voltage silicon stack D4 is connected another output as described circuit with the end of capacitor C4, the other end of this capacitor C4 is connected another input as described circuit with the negative electrode of a high voltage silicon stack D3.
Claims (7)
1. based on the polarity inversion voltage generation circuit of high direct voltage tandem circuit for generating, it is characterized in that,
It comprises voltage regulator (1), step-up transformer (2), positive polarity high direct voltage tandem circuit for generating (3), negative polarity high direct voltage tandem circuit for generating (4), single-pole double-throw switch (SPDT) and protective resistance;
the two ends of the primary coil of voltage regulator (1) are used for the input single-phase ac signal, one end of the secondary coil of voltage regulator (1) is connected with an end of the primary coil of step-up transformer (2), the adjustable end of the secondary coil of voltage regulator (1) is connected with the other end of the primary coil of step-up transformer (2), one end of the secondary coil of step-up transformer (2) simultaneously and the signal of positive polarity high direct voltage tandem circuit for generating (3) input A end be connected 4 with negative polarity high direct voltage tandem circuit for generating) signal input A hold and be connected, the other end of the secondary coil of step-up transformer (2) is inputted the B end with the signal of positive polarity high direct voltage tandem circuit for generating (3) simultaneously, signal input B end and the power supply ground connection of negative polarity high direct voltage tandem circuit for generating (4), what the DC signal output C of positive polarity high direct voltage tandem circuit for generating (3) end connected single-pole double-throw switch (SPDT) often opens fixed contact, the DC signal output C end of negative polarity high direct voltage tandem circuit for generating (4) connects the normally closed fixed contact of single-pole double-throw switch (SPDT), the moving contact of single-pole double-throw switch (SPDT) connects an end of protective resistance, the two ends of series connection test product between the other end of this protective resistance and power supply ground.
2. the polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating according to claim 1, it is characterized in that, described positive polarity high direct voltage tandem circuit for generating (3) is composed in series by N positive polarity dc high-voltage circuit (3-1), and N is the positive integer greater than 1.
3. the polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating according to claim 2, is characterized in that, described positive polarity high direct voltage tandem circuit for generating (3) is composed in series by 2 positive polarity dc high-voltage circuits (3-1).
4. according to claim 2 or 3 described polarity inversion voltage generation circuits based on high direct voltage tandem circuit for generating, is characterized in that,
Positive polarity dc high-voltage circuit (3-1) comprises two negative polarity high voltage silicon stacks (D1), (D2) and two capacitor C1, C2; The end of capacitor C1 is as an input of described circuit, the other end of capacitor C1 simultaneously with the anodic bonding of the negative electrode of a negative polarity high voltage silicon stack (D1) and another high voltage silicon stack (D2) after as an output of described circuit, the negative electrode of described another high voltage silicon stack (D2) is connected another output as described circuit with the end of capacitor C2, the anodic bonding of the other end of this capacitor C2 and a negative polarity high voltage silicon stack (D1) is as another input of described circuit.
5. the polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating according to claim 1, is characterized in that,
Described negative polarity high direct voltage tandem circuit for generating 3 is composed in series by N negative polarity dc high-voltage circuit (4-1), and N is the positive integer greater than 1.
6. the polarity inversion voltage generation circuit based on high direct voltage tandem circuit for generating according to claim 5, is characterized in that, described negative polarity high direct voltage tandem circuit for generating 3 is composed in series by 2 negative polarity dc high-voltage circuits (4-1).
7. according to claim 5 or 6 described polarity inversion voltage generation circuits based on high direct voltage tandem circuit for generating, is characterized in that,
Negative polarity dc high-voltage circuit (4-1) comprises two high voltage silicon stacks (D3), (D4) and two capacitor C3, C4; The end of capacitor C3 is as an input of described circuit, the other end of capacitor C3 is connected afterwards an output as described circuit simultaneously with the anode of a high voltage silicon stack (D3) and the negative electrode of high voltage silicon stack (D4) of being connected, the anode of described another high voltage silicon stack (D4) is connected another output as described circuit with the end of capacitor C4, the other end of this capacitor C4 is connected another input as described circuit with the negative electrode of a high voltage silicon stack (D3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220681820 CN202931209U (en) | 2012-12-11 | 2012-12-11 | Polarity reversal voltage generation device based on DC high-voltage cascade generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220681820 CN202931209U (en) | 2012-12-11 | 2012-12-11 | Polarity reversal voltage generation device based on DC high-voltage cascade generation circuit |
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| CN202931209U true CN202931209U (en) | 2013-05-08 |
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|---|---|---|---|
| CN 201220681820 Expired - Fee Related CN202931209U (en) | 2012-12-11 | 2012-12-11 | Polarity reversal voltage generation device based on DC high-voltage cascade generation circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983758A (en) * | 2012-12-11 | 2013-03-20 | 哈尔滨理工大学 | Polarity-reversal voltage generator based on direct current high voltage cascade generation circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983758A (en) * | 2012-12-11 | 2013-03-20 | 哈尔滨理工大学 | Polarity-reversal voltage generator based on direct current high voltage cascade generation circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20131211 |