CN216086161U - High voltage regulating device - Google Patents
High voltage regulating device Download PDFInfo
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- CN216086161U CN216086161U CN202121651968.2U CN202121651968U CN216086161U CN 216086161 U CN216086161 U CN 216086161U CN 202121651968 U CN202121651968 U CN 202121651968U CN 216086161 U CN216086161 U CN 216086161U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model relates to the field of power technology, and is widely applied to voltage regulation and stabilization devices, in particular to a high-voltage regulation device which is simple to control, does not generate inverse peak voltage, is safe and reliable, and has good voltage regulation effect, and comprises a plurality of 3M regulators connected in series, wherein each 3M regulator is a three-phase voltage regulator formed by combining 3 single-phase regulators, and each group of 3M regulators comprises a primary winding 3M1, a primary winding 3M2, a primary winding 3M3, a primary winding 3M4, a primary winding 3M5, a primary winding 3M6 and a secondary winding.
Description
Technical Field
The utility model relates to the field of electric power technology, and is widely applied to voltage regulating and stabilizing devices. And more particularly to a high voltage regulator.
Background
Electric power is one of the most important energy sources used in modern industry, agriculture and modern society life, and various industrial electric equipment is widely influenced by voltage change. With the development of science and technology, electricity will play a greater role in the development of the human society. Voltage is an important property of electricity, and is an important parameter of the energy supply characteristic of a power supply, and is a primary factor to be considered in the matching between power supply and electric equipment.
The electricity is a product of the civilized society, and promotes the development of the civilized society, the use degree of the electricity is closely related to the civilized society, the index of the civilized society is that the scientific technology develops rapidly, the socialization degree of the production is higher, the production scale is larger and larger, the technical requirement is more and more complex, the division of labor is more and more detailed, and the coordination of each production link is more and more important. The voltage value, the voltage standard value and their classification are one of the contents that need to be coordinated. All the parts are coordinated and consistent as much as possible, so that a relatively stable stage can be achieved, the interchangeability and the universality of the electrical equipment are improved, the customized electrical equipment is reduced, the efficient and large-scale production service of the electrical equipment is realized, and the production cost caused by the unmatched voltage values is reduced. The main hazards that arise from voltage variations:
1. low voltage: the low voltage has the most serious influence on modern industry, agriculture and modern society life, and can affect the output power and the service life of electrical equipment, increase the power consumption, reduce or scrap the product quality, reduce the yield, damage the equipment, and forcedly stop the production, and even can affect the power system: the lower the voltage is, the lower the stable power limit is, and the lower the difference value (namely, power reserve) between the power limit and the line output power is, the more easily the unstable phenomenon occurs, and the serious accident that the power supply system is broken down can be caused in the serious case.
2. High voltage: the electrical equipment is designed and manufactured to operate at rated voltage. When the voltage rises, the influence on the transformer and the mutual inductor is mainly that the exciting current is increased, so that the magnetic induction intensity B in the iron core is increased, the iron loss is increased, and the temperature rise of the iron core is increased, thereby accelerating the aging and the damage of the winding insulation, and even being forced to stop production. Secondly, the influence on the capacitor is that the reactive power of the capacitor is proportional to the square of the voltage, the reactive power is also improved when the voltage rises, but the partial discharge is enhanced due to the enhancement of the electric field, so that the insulation life is reduced. If it is 1.1U for a long timeNUnder operation, the service life of the device is reduced to about 44% of the rated service life, and the production is forced to be influenced.
3. Hazards from three-phase imbalance: when the system is in three-phase unbalanced operation, the three-phase voltage current may contain a large amount of negative sequence components and/or zero sequence components. Due to the existence of the negative sequence component and/or the zero sequence component, various negative effects may be caused on various electrical equipment, and the circuit is characterized in that: in three-phase unbalance, negative sequence current can produce additional loss, increases the line loss, makes transmission line voltage loss increase simultaneously, still increases the interference to communication system in addition, influences normal communication quality. Computer and other electronic devices: unbalanced current appears on the neutral line inevitably due to three-phase unbalance, zero potential drift is generated, electrical noise interference is generated on electronic equipment such as a computer, and even the equipment cannot work normally. ③ induction motor: under the action of the unbalanced voltage, the negative sequence current generates braking torque, so that the maximum torque and the output power of the induction motor are reduced. Under the interaction of the positive and negative magnetic fields, pulse torque is generated, which may cause the motor to vibrate. Because the negative sequence impedance of the motor is small, the negative sequence voltage may generate an excessive negative sequence current, thereby increasing the copper loss of the stator and the rotor of the motor, overheating the motor and accelerating the aging of the insulation. For example, long-term operation in a 4% negative-sequence voltage condition will cause heating of the rated-torque motor, thereby resulting in a half-life reduction of the motor insulation. If a certain phase voltage is higher than the rated voltage value, the service life of the operation is reduced more seriously, and even the safe production is influenced.
And voltage quality issues include the following:
voltage deviation: the operation voltage value is within the range of +/-10% of the rated voltage value;
under voltage: the operation voltage value is in the range of 90-80% of the rated voltage value and the duration time
A voltage change of greater than 1 minute;
③ overvoltage: the operation voltage value is in the range of 110-120% of the rated voltage value and is continuous
Voltage change for more than 1 minute;
fourthly, short-time undervoltage, wherein the time range is 3 seconds to 1 minute;
short-time overvoltage, wherein the time range is 3 seconds to 1 minute;
sixthly, temporary overvoltage is carried out, wherein the time range is 60 milliseconds to 3 seconds;
seventhly, temporarily undervoltage, wherein the time range is 60 milliseconds to 3 seconds;
eighthly, unbalance of three-phase voltage: the unevenness of the three-phase voltage is more than or equal to 2 percent and the short time is more than or equal to 4 percent.
According to the safe voltage requirement of the electric equipment, namely, the voltage difference change of the voltage of the electric equipment is within +/-5%. Some requirements are higher, namely the voltage difference change of the terminal of the electric equipment is less than or equal to 2.5 percent, and the unbalance degree of the three-phase voltage is less than or equal to 2.6 percent. At present, voltage regulating devices on the market mainly comprise an unloaded voltage regulating transformer, an loaded voltage regulating transformer, reactive compensation equipment, a VQC voltage reactive control device, an induction type voltage regulator and a carbon brush type alternating current voltage stabilizer, but the products have the following defects: firstly, the no-load voltage regulating transformer has low cost and reliable performance, but cannot be synchronously adjusted along with the voltage change and can only be adjusted after power failure; the on-load tap changer can be synchronously adjusted along with the voltage change, but is provided with an on-load tap changer, so that the generation of electric arcs is difficult to avoid when the voltage is adjusted, and the on-load tap changer needs to be maintained frequently; the reactive compensation equipment has reliable performance, but can only repair the voltage change caused by reactive power and cannot repair the voltage change caused by active power; the VQC voltage reactive power control device can ensure the voltage quality, optimize the reactive power flow of the power grid, play an important role in the economic operation of the power grid and the like, and the continuous working safety time of the VQC voltage reactive power control device is less than or equal to 1000 hours; the response speed of the induction type voltage regulator is low although reliable, the voltage regulating speed is less than or equal to 5V/S, the efficiency is less than or equal to 93 percent, and the voltage stabilizing precision is less than or equal to +/-5 percent; and sixthly, the voltage regulating speed of the carbon brush type alternating current voltage stabilizer is less than or equal to 25V/S, and regular maintenance is needed.
The applicant also found that the no-load voltage regulating transformer can not be adjusted synchronously with the voltage change, and can only be adjusted after power failure, so that the no-load voltage regulating transformer is troublesome to use and cannot play an effective voltage stabilizing role. It is also found that when the voltage rises, the exciting current of the transformer is increased, the magnetic induction intensity B in the iron core is increased, the iron loss is increased, and the temperature rise of the iron core is increased to accelerate the insulation aging of the winding; secondly, the on-load tap changer is easy to generate electric arc when adjusting voltage. It is also found that if the maintenance is not timely, short-time undervoltage of power supply can be caused, so that advanced power utilization equipment stops working or is damaged, even voltage breakdown of a power supply system can be caused, and adverse effects are brought to production, operation and working life of the power utilization area; and thirdly, the reactive compensation equipment cannot repair voltage change caused by active power. It was also found that the reactive power of the capacitor is proportional to the square of the voltage, and the voltage rise increases the reactive power, but the partial discharge is intensified by the electric field increase, and the insulation life is reduced, and if the capacitor is operated for a long time under 1.1UN, the life is reduced to about 44% of the rated life. It is also found that the phenomena of explosion of the capacitor, bulging of the shell and the like are caused by partial discharge and insulation aging accumulation effects, so that the expected service life of the reactive power compensation device and the safe operation of power supply are seriously influenced by high voltage; and fourthly, the VQC voltage reactive power control device can cause short-time undervoltage of power supply if the continuous working safety time is more than or equal to 1000 hours and the maintenance is not timely, so that advanced power utilization equipment stops working or is damaged, and even a power supply system in the power utilization area is collapsed. Meanwhile, the root causes of the third step are caused by unreasonable voltage-regulating tap joints of the power transformer and unreliable on-load voltage-regulating tap joint switches; an induction type voltage regulator, the voltage regulating speed is less than or equal to 5V/S, the efficiency is less than or equal to 93 percent, and the voltage stabilizing precision is less than or equal to +/-5 percent; and sixthly, the voltage regulating speed of the carbon brush type alternating current voltage stabilizer is less than or equal to 25V/S, and regular maintenance is needed. It has also been found that if the carbon brush is not maintained regularly, when the carbon brush is worn seriously, the copper column is burnt off and the power supply is affected, and the safety accident is caused seriously.
In view of the above technical problems, the applicant invented: the present invention relates to a high voltage regulator, and more particularly to a high voltage regulator, which includes a first three-phase high voltage regulator, a second high voltage regulator, a third three-phase low voltage compensator, a fourth low voltage compensator, a fifth voltage quality restoration device, a sixth economical three-phase ac regulator, and a seventh economical ac regulator.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides the high-voltage regulating device which is simple to control, does not generate inverse peak voltage, is safe and reliable and has a good voltage regulating effect.
The second technical scheme of the utility model is a high voltage regulating device, which comprises a plurality of series-connected 3M regulators, wherein each 3M regulator is a three-phase voltage regulator formed by combining 3 single-phase regulators, and each group of 3M regulators comprises a primary winding 3M1, a primary winding 3M2, a primary winding 3M3, a primary winding 3M4, a primary winding 3M5, a primary winding 3M6 and a secondary winding.
The input end and the output end of the high-voltage regulating device are connected in series with a primary side winding of the combined three-phase power step-down transformer.
In a further improvement, the system further comprises a triac SCRM1, a triac SCRM2, a triac SCRM3, a triac SCRM4, a triac SCRM5 and a triac SCRM6, wherein the primary winding 3M1 is connected to one end of the triac SCRM1, the primary winding 3M2 is connected to one end of the triac SCRM2, the primary winding 3M3 is connected to one end of the triac SCRM3, the primary winding 3M4 is connected to one end of the triac SCRM4, the primary winding 3M5 is connected to one end of the triac SCRM5, the primary winding 3M6 is connected to one end of the triac SCRM6, the other end of the triac SCRM1 is connected to the primary winding 3M2, the other end of the triac SCRM3 is connected to the primary winding 3M4, and the other end of the triac SCRM5 is connected to the primary winding 3M 6.
In a further improvement, the protection circuit further comprises a control protection switch QF1, a control protection switch QF2 and a control protection switch QF3, wherein the other end of the triac SCRM2 is connected to one end of the control protection switch QF1, the other end of the triac SCRM4 is connected to one end of the control protection switch QF2, the other end of the triac SCRM6 is connected to one end of the control protection switch QF3, the other end of the control protection switch QF1 is connected to the phase a output end, the other end of the control protection switch QF2 is connected to the phase B output end, and the other end of the control protection switch QF3 is connected to the phase C output end.
In a further improvement, the device further comprises a suppressor HB1, a suppressor HB2 and a suppressor HB3, wherein the suppressor HB1 is connected between the primary winding 3M1 and the primary winding 3M2, the suppressor HB2 is connected between the primary winding 3M3 and the primary winding 3M4, and the suppressor HB3 is connected between the primary winding 3M5 and the primary winding 3M 6.
In a further improvement, the primary winding 3M1, the primary winding 3M3 and the primary winding 3M5 are all connected to the input N line.
The improved touch screen display system further comprises an operating system, a main control system and a driving system, wherein the three-phase input voltage, the three-phase input current, the three-phase output voltage, the three-phase output current and each group of 3M regulators are connected to the main control system, the operating system and the driving system are connected to the main control system, the operating system is a touch screen operation interface, and the main control system controls the 3M regulators to work through the driving system.
In a further improvement, the system also comprises a combination of at least 1 single-phase regulator connected in series or in parallel.
By adopting the technical scheme, the utility model has the beneficial effects that: the utility model provides a high voltage regulating device, which is particularly shown in an attached figure 1. When the power is on or the input voltage is equal to the rated voltage, the main control system controls the bidirectional thyristors SCRM2, SCRM4 and SCRM6 to be turned off, and simultaneously turns on SCRM1, SCRM3 and SCRM5 to short the primary winding so that the input voltage is equal to the output voltage, and when the input voltage is higher than the rated voltage, the main control system controls SCRM1, SCRM3 and SCRM5 to be turned off, and simultaneously turns on SCRM2, SCRM4 and SCRM6 to offset the voltage of the primary winding to the secondary winding so that the output voltage is equal to the rated voltage value.
The utility model has simple control, no peak reversal voltage, safety and reliability, fast response time of less than or equal to 40 milliseconds, input voltage width of more than or equal to 130 percent of rated voltage value, output voltage precision of less than or equal to 1.5 percent, input three-phase unbalance of less than or equal to 15 percent, output three-phase unbalance of less than or equal to 2.5 percent, efficiency of more than or equal to 99.3 percent, rated capacity of less than or equal to 3000KVA, continuous safe operation time of 1 year and service life of more than or equal to 20 years, and can make up for the defects of products on the market.
Drawings
FIG. 1 is a schematic circuit diagram of a high voltage regulator in an embodiment of the present invention;
FIG. 2 is a diagram of an interface of the human machine system device of the embodiment of the utility model shown in FIG. 1;
FIG. 3 is a diagram of an interface of the human machine system device of an embodiment of the utility model shown in FIG. 2;
FIG. 4 is a diagram of an interface of the human-machine system device in an embodiment of the utility model shown in FIG. 3.
Detailed Description
The utility model is described in further detail below with reference to the following figures and detailed description:
as shown in fig. 1, a high voltage regulating apparatus includes a plurality of series-connected 3M regulators, each of the 3M regulators being a three-phase voltage regulator composed of 3 single-phase regulators, each group of the 3M regulators including a primary winding 3M1, a primary winding 3M2, a primary winding 3M3, a primary winding 3M4, a primary winding 3M5, a primary winding 3M6, and a secondary winding; further comprising a triac SCRM1, a triac SCRM2, a triac SCRM3, a triac SCRM4, a triac SCRM5 and a triac SCRM6, said primary winding 3M1 is connected to one end of the triac SCRM1, said primary winding 3M2 is connected to one end of the triac SCRM2, said primary winding 3M3 is connected to one end of the triac SCRM3, said primary winding 3M4 is connected to one end of the triac SCRM4, said primary winding 3M5 is connected to one end of the triac SCRM5, said primary winding 3M6 is connected to one end of the triac SCRM6, the other end of the triac SCRM1 is connected to the primary winding 3M2, the other end of the triac SCRM3 is connected to the primary winding 3M4, and the other end of the triac SCRM5 is connected to the primary winding 3M 6. The control protection circuit further comprises a control protection switch QF1, a control protection switch QF2 and a control protection switch QF3, the other end of the bidirectional thyristor SCRM2 is connected to one end of the control protection switch QF1, the other end of the bidirectional thyristor SCRM4 is connected to one end of the control protection switch QF2, the other end of the bidirectional thyristor SCRM6 is connected to one end of the control protection switch QF3, the other end of the control protection switch QF1 is connected to the phase A output end, the other end of the control protection switch QF2 is connected to the phase B output end, and the other end of the control protection switch QF3 is connected to the phase C output end; the three-phase inverter further comprises a suppressor HB1, a suppressor HB2 and a suppressor HB3, the suppressor HB1 is connected between the primary winding 3M1 and the primary winding 3M2, the suppressor HB2 is connected between the primary winding 3M3 and the primary winding 3M4, and the suppressor HB3 is connected between the primary winding 3M5 and the primary winding 3M 6. The primary winding 3M1, the primary winding 3M3 and the primary winding 3M5 are all connected to an input N line; still include operating system, major control system, actuating system, three-phase input voltage, electric current and three-phase output voltage, electric current and each group 3M adjuster all connect in major control system, operating system and actuating system all connect in major control system, operating system is touch screen operation interface, major control system passes through actuating system control 3M adjuster work. Fig. 2-4 show the interfaces of the human-machine system device of the present invention, including voltage display, current display, technical parameter setting display, technical parameter resetting, and the main view display: the input voltage comprises a current value, a maximum value and a minimum value which are automatically recorded in real time, the output voltage comprises a current value, a maximum value and a minimum value which are automatically recorded in real time, the current comprises a current value and a maximum value and a minimum value which are automatically recorded in real time, the technical parameter setting display comprises a rated voltage value, a voltage-stabilizing precision value, a voltage-stabilizing threshold value setting value, a voltage regulation mode, a working mode, an abnormal three-phase unbalance protection value, an abnormal overvoltage protection value, an abnormal undervoltage protection value, an input fault processing mode and a voltage-stabilizing fault processing mode, and the technical parameter resetting comprises a rated voltage value, a voltage-stabilizing precision value, a voltage-stabilizing threshold value setting value, a voltage regulation mode, a working mode, an abnormal three-phase unbalance protection value, an abnormal overvoltage protection value, an abnormal undervoltage protection value, "input fault processing mode" and "voltage stabilization fault processing mode".
The utility model relates to a high-voltage regulating device, which also comprises a combination of at least 1 single-phase regulator connected in series or in parallel. Are also within the scope of the present invention.
The working principle is as follows: when the power is on or the input voltage is equal to the rated voltage, the main control system controls the bidirectional thyristors SCRM2, SCRM4 and SCRM6 to be turned off, and simultaneously turns on SCRM1, SCRM3 and SCRM5 to short the primary winding so that the input voltage is equal to the output voltage, and when the input voltage is higher than the rated voltage, the main control system controls SCRM1, SCRM3 and SCRM5 to be turned off, and simultaneously turns on SCRM2, SCRM4 and SCRM6 to offset the voltage of the primary winding to the secondary winding so that the output voltage is equal to the rated voltage value.
The present invention has been described in detail with reference to the specific embodiments, but these should not be construed as limitations of the present invention. Numerous variations and modifications can be made by those skilled in the art without departing from the principles of the utility model, which should also be viewed as the protection of the utility model.
Claims (7)
1. A high voltage regulation device, characterized by: the three-phase voltage regulator comprises a plurality of series-connected 3M regulators, each 3M regulator is a three-phase voltage regulator formed by combining 3 single-phase regulators, and each group of 3M regulators comprises a primary winding 3M1, a primary winding 3M2, a primary winding 3M3, a primary winding 3M4, a primary winding 3M5, a primary winding 3M6 and a secondary winding.
2. A high voltage regulation device as claimed in claim 1, wherein: further comprising a triac SCRM1, a triac SCRM2, a triac SCRM3, a triac SCRM4, a triac SCRM5 and a triac SCRM6, said primary winding 3M1 is connected to one end of the triac SCRM1, said primary winding 3M2 is connected to one end of the triac SCRM2, said primary winding 3M3 is connected to one end of the triac SCRM3, said primary winding 3M4 is connected to one end of the triac SCRM4, said primary winding 3M5 is connected to one end of the triac SCRM5, said primary winding 3M6 is connected to one end of the triac SCRM6, the other end of the triac SCRM1 is connected to the primary winding 3M2, the other end of the triac SCRM3 is connected to the primary winding 3M4, and the other end of the triac SCRM5 is connected to the primary winding 3M 6.
3. A high voltage regulation device as claimed in claim 2, wherein: the protection circuit further comprises a control protection switch QF1, a control protection switch QF2 and a control protection switch QF3, the other end of the bidirectional thyristor SCRM2 is connected to one end of the control protection switch QF1, the other end of the bidirectional thyristor SCRM4 is connected to one end of the control protection switch QF2, the other end of the bidirectional thyristor SCRM6 is connected to one end of the control protection switch QF3, the other end of the control protection switch QF1 is connected to the A-phase output end, the other end of the control protection switch QF2 is connected to the B-phase output end, and the other end of the control protection switch QF3 is connected to the QF-phase output end.
4. A high voltage regulation device as claimed in claim 3, wherein: the three-phase inverter further comprises a suppressor HB1, a suppressor HB2 and a suppressor HB3, the suppressor HB1 is connected between the primary winding 3M1 and the primary winding 3M2, the suppressor HB2 is connected between the primary winding 3M3 and the primary winding 3M4, and the suppressor HB3 is connected between the primary winding 3M5 and the primary winding 3M 6.
5. A high voltage regulation device as claimed in claim 4, wherein: the primary winding 3M1, the primary winding 3M3 and the primary winding 3M5 are all connected to an input N line.
6. A high voltage regulation device as claimed in claim 5, wherein: still include operating system, major control system, actuating system, three-phase input voltage, electric current and three-phase output voltage, electric current and each group 3M adjuster all connect in major control system, operating system and actuating system all connect in major control system, operating system is touch screen operation interface, major control system passes through actuating system control 3M adjuster work.
7. A high voltage regulation device as claimed in claim 1, wherein: the device also comprises a combination of at least 1 single-phase regulator connected in series or in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121651968.2U CN216086161U (en) | 2021-07-20 | 2021-07-20 | High voltage regulating device |
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| CN202121651968.2U CN216086161U (en) | 2021-07-20 | 2021-07-20 | High voltage regulating device |
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| CN216086161U true CN216086161U (en) | 2022-03-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116313451A (en) * | 2023-05-11 | 2023-06-23 | 三尔梯(泉州)电气制造有限公司 | Single-phase bipolar reactor, voltage stabilizing device, three-phase bipolar reactor and application thereof |
-
2021
- 2021-07-20 CN CN202121651968.2U patent/CN216086161U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116313451A (en) * | 2023-05-11 | 2023-06-23 | 三尔梯(泉州)电气制造有限公司 | Single-phase bipolar reactor, voltage stabilizing device, three-phase bipolar reactor and application thereof |
| CN116313451B (en) * | 2023-05-11 | 2023-08-29 | 三尔梯(泉州)电气制造有限公司 | Single-phase bipolar reactor, voltage stabilizing device, three-phase bipolar reactor and application thereof |
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