CN116388356A - On-line activation device for capacitor of frequency converter body and application method of on-line activation device - Google Patents
On-line activation device for capacitor of frequency converter body and application method of on-line activation device Download PDFInfo
- Publication number
- CN116388356A CN116388356A CN202310105039.9A CN202310105039A CN116388356A CN 116388356 A CN116388356 A CN 116388356A CN 202310105039 A CN202310105039 A CN 202310105039A CN 116388356 A CN116388356 A CN 116388356A
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- Prior art keywords
- frequency converter
- activation
- capacitor
- contactor
- voltage regulator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
- H02J7/04—Regulation of charging current or voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
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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
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The invention belongs to the technical field of frequency converter body capacitor activation, and particularly relates to an on-line frequency converter body capacitor activation device and a use method thereof. Including the block terminal, install AC contactor, rectifier and a plurality of voltage regulator in the block terminal, AC contactor output electric connection has timer, pilot lamp, rectifier, and rectifier output electric parallel connection a plurality of voltage regulator, and the voltage regulator includes a plurality of terminal row, and the block terminal articulates there is operating panel, installs timer, pilot lamp, operating switch on the operating panel, operating switch electric connection AC contactor, AC contactor input three-phase current, voltage regulator output two-phase current. The invention is of complete design, automatic operation and delay control function, can realize automatic time control, does not need manual extra operation, saves manpower and improves production efficiency.
Description
Technical Field
The invention belongs to the technical field of frequency converter body capacitor activation, and particularly relates to an on-line frequency converter body capacitor activation device and a use method thereof.
Background
The frequency converter equipment in metallurgical electrical equipment has long on-line operation time, so that the components of the body are aged, and off-line spare parts are required to be prepared. The electrolytic capacitors are arranged in the old frequency converter on the line and the frequency converter below the line and used for filtering a direct-current loop of the frequency converter, a small amount of charges stored in the capacitors can disappear after the electrolytic capacitors are not used for a long time, the electrolytic capacitors without charges are in a short circuit state, once the frequency converter is electrified, the electrolytic capacitors are damaged due to explosion caused by the short circuit, and finally the frequency converter is damaged.
Disclosure of Invention
The invention aims to provide an on-line activation device for a capacitor of a frequency converter body and a use method thereof, which can automatically operate to solve the problems in the prior art.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an online activation device of converter body electric capacity, including the block terminal, install AC contactor in the block terminal, rectifier and a plurality of voltage regulator, AC contactor output electric connection has the timer, the pilot lamp, the rectifier, a plurality of voltage regulator of rectifier output electric parallel connection, the voltage regulator includes a plurality of terminal row, the block terminal articulates there is operating panel, install the timer on the operating panel, the pilot lamp, operating switch electric connection AC contactor, AC contactor input three-phase current, the two-phase current of voltage regulator output.
The application method of the on-line activation device of the body capacitor of the frequency converter comprises the following steps:
(1) Preparing a frequency converter: disconnecting a line-in power supply of the frequency converter before the capacitor of the frequency converter body is activated, and connecting an output line of a capacitor on-line activation device of the frequency converter body with a middle direct current bus loop of the frequency converter after detecting no voltage on the middle direct current bus loop of the frequency converter under the condition that the frequency converter is confirmed to be unpowered;
(2) Activation preparation: wiring the three-phase power supply and the alternating current contactor to provide 380V three-phase alternating current, and detecting whether the power supply voltage meets the requirement or not by using a universal meter;
(3) Setting activation time: after the power is supplied, a power circuit breaker in the alternating current contactor is closed to enable the control loop to be electrified, a display panel of the timer starts to display at the moment, and time is set according to the number of dead months of the frequency converter multiplied by the charging coefficient 0.8=charging time (h);
(4) The activation process is started: when the activation time is set, the activation of the frequency converter capacitor is started, at the moment, an operation switch on the operation panel is switched to a switching-on position, the frequency converter body capacitor on-line activation device starts to work, and the voltage regulator effectively prevents the electrolytic capacitor from being electrified with larger voltage and current at the beginning of activation;
(5) Automatic stopping: the whole activation process only needs to measure the temperature of the device, when the temperature is too high, the operation switch is manually switched to the switching-off position, when the temperature is normal, the operation is not needed, and after the set activation time is reached, the activation device automatically cuts off the power supply, and the frequency converter and the activation device are powered off;
(6) Activation is completed: after the operation of the activating device is stopped, the capacitor of the frequency converter body can already meet the power transmission use requirement, but at the moment, residual voltage still exists on the capacitor of the frequency converter body, and after personnel are required to carry corresponding protective appliances, the activating device circuit connected with the direct current bus of the frequency converter is detached.
The invention has the following beneficial effects:
1. the rectifier is designed to rectify three-phase alternating current power into direct current.
2. The whole activating device is of a complete design, and only needs to be connected with an inlet and outlet power line.
3. The invention has the delay control function, can realize time control, and can wait for the time to be disconnected after the charging time is set.
4. And the automatic operation in the activation process is realized only by detecting the temperature, no manual additional operation is needed, the manpower is saved, and the production efficiency is improved.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic diagram of the structure of the present invention.
FIG. 3 is a flow chart of a method of use of the present invention.
Fig. 4 is a schematic circuit diagram of the present invention.
Wherein: 1. a distribution box; 2. an alternating current contactor; 3. a rectifier; 4. a voltage regulator; 5. an operation panel; 6. a timer; 7. an indicator light; 8. a terminal block; 9. the switch is operated.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-3, an on-line activation device for a capacitor of a frequency converter body comprises a distribution box 1, wherein an alternating-current contactor 2, a rectifier 3 and a plurality of voltage regulators 4 are installed in the distribution box 1, the output end of the alternating-current contactor 2 is electrically connected with a timer 6, an indicator lamp 7 and the rectifier 3, the output end of the rectifier 3 is electrically connected with the plurality of voltage regulators 4 in parallel, the voltage regulators 4 comprise a plurality of terminal rows 8, the distribution box 1 is hinged with an operation panel 5, the operation panel 5 is provided with the timer 6, the indicator lamp 7 and an operation switch 9, the operation switch 9 is electrically connected with the alternating-current contactor 2, three-phase current is input by the input end of the alternating-current contactor 2, and two-phase current is output by the output end of the voltage regulator 4.
The application method of the on-line activation device of the body capacitor of the frequency converter comprises the following steps:
(1) Preparing a frequency converter: disconnecting a line-in power supply of the frequency converter before the capacitor of the frequency converter body is activated, and connecting an output line of a capacitor on-line activation device of the frequency converter body with a middle direct current bus loop of the frequency converter after detecting no voltage on the middle direct current bus loop of the frequency converter under the condition that the frequency converter is confirmed to be unpowered;
(2) Activation preparation: the three-phase power supply is connected with the alternating current contactor 2 to provide 380V three-phase alternating current, and a universal meter is used for detecting whether the power supply voltage meets the requirement;
(3) Setting activation time: after the power is supplied, a power circuit breaker in the alternating current contactor 2 is closed to enable the control loop to be electrified, at the moment, the display panel of the timer 6 starts to display, and time is set according to the number of dead months of the frequency converter multiplied by the charging coefficient 0.8=charging time (h);
(4) The activation process is started: when the activation time is set, the activation of the frequency converter capacitor is started, at the moment, the operation switch 9 on the operation panel 5 is switched to the 'closing' position, the on-line activation device of the frequency converter body capacitor starts to work, and the voltage regulator 4 effectively prevents the electrolytic capacitor from being electrified with larger voltage and current at the beginning of activation;
(5) Automatic stopping: the whole activation process only needs to measure the temperature of the device, when the temperature is too high, the operation switch 9 is manually switched to the switching-off position, when the temperature is normal, no operation is needed, and after the set activation time is reached, the activation device automatically cuts off the power supply, and the frequency converter and the activation device are powered off;
(6) Activation is completed: after the operation of the activating device is stopped, the capacitor of the frequency converter body can already meet the power transmission use requirement, but at the moment, residual voltage still exists on the capacitor of the frequency converter body, and after personnel are required to carry corresponding protective appliances, the activating device circuit connected with the direct current bus of the frequency converter is detached.
The working principle of the invention is as follows: as shown in fig. 4, the device is connected to three-phase four-wire alternating current (L1/L2/L3/N), the alternating current is switched on and off through a breaker inside the ac contactor 2, the switching on and off of the breaker determines whether the charging device has electricity, and when the breaker is on, the charging device has electricity, at this time, a power indicator in the auxiliary circuit is turned on, and because the ac contactor 2 does not operate, the stop indicator is turned on. When the three-phase alternating current reaches the inlet of the alternating current contactor 2 at this time, if the switch of opening/closing is operated to enable the coil of the alternating current contactor 2 to be electrified so as to enable the contactor to be connected with a three-phase circuit, the rectifier 3 starts to work to integrate the three-phase alternating current into direct current, and a step-down resistor is connected in series with the positive electrode of the direct current and is used for charging the capacitor of the frequency converter after the direct current voltage is reduced. At this time, the running indicator lights are turned on and the stop indicator lights are turned off. The circuit of the timer 6 is also switched on after the AC contactor 2 is switched on, the coil of the timer 6 is electrified, and when the set time is reached, the contact of the timer 6 cuts off the coil loop of the AC contactor 2, so that the charging device stops working, and at the moment, the running indicator lamp is turned off and the stop indicator lamp is turned on.
The invention adopts a mode of being lower than the rated voltage of the capacitor of the frequency converter body to charge the capacitor slowly, adopts three-phase electricity of a common factory to supply power, converts three-phase alternating current into direct current through a designed rectifier 3, has higher voltage after the three-phase alternating current is converted into the direct current, adopts a resistor in a voltage regulator 4 to reduce the voltage, and the specific voltage reduction amplitude is determined according to the capacity of the frequency converter and the dead time. The combination of the rectifier 3 and the voltage regulator 4 provides a voltage for activating the capacitor, and when the rectifier 3 is connected with the capacitor, the current is high, and for protecting personnel and equipment, an alternating current contactor 2 capable of realizing remote control is arranged on the power supply side of the rectifier 3 for connecting a circuit. The time for which the frequency converter body capacitor needs to be activated is different because the frequency converter is deactivated for different durations, so that a timer 6 is arranged on the device for time control, and the frequency converter body capacitor is deactivated for month x the charging coefficient 0.8=charging time (h). After the charging time is set in the timer 6, the ac contactor 2 of the charging circuit is opened immediately after the charging time.
The above examples are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Various modifications and improvements of the technical scheme of the invention, which are made by those skilled in the art, are included in the protection scope of the invention without departing from the design concept of the invention.
The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (2)
1. The utility model provides an online activation device of converter body electric capacity, its characterized in that, includes the block terminal, install AC contactor, rectifier and a plurality of voltage regulator in the block terminal, AC contactor output electric connection has timer, pilot lamp, rectifier, and a plurality of voltage regulator is connected in parallel to rectifier output electric property, and the voltage regulator includes a plurality of terminal row, and the block terminal articulates there is operating panel, installs timer, pilot lamp, operating switch on the operating panel, operating switch electric connection AC contactor, AC contactor input three-phase current, voltage regulator output two-phase current.
2. The method for using the on-line activation device for the capacitor of the frequency converter body according to claim 1, comprising the following steps:
(1) Preparing a frequency converter: before the capacitor of the frequency converter body is activated, the incoming line power supply of the frequency converter is disconnected, under the condition of confirming that the frequency converter is not powered, the intermediate direct current bus loop of the frequency converter is detected to be voltage-free, the output circuit of the capacitor on-line activation device of the frequency converter body is connected with the intermediate direct current bus loop of the frequency converter,
(2) Activation preparation: the three-phase power supply and the alternating current contactor are connected to provide 380V three-phase alternating current, and a universal meter is used for detecting whether the power supply voltage meets the requirement,
(3) Setting activation time: after the power is supplied, a power circuit breaker in the alternating current contactor is closed to enable the control loop to be electrified, a display panel of the timer starts to display at the moment, the time is set according to the stopping month number of the frequency converter multiplied by the charging coefficient 0.8=charging time (h),
(4) The activation process is started: when the activation time is set, the activation of the frequency converter capacitor is started, at the moment, an operation switch on the operation panel is switched to a switch-on position, the frequency converter body capacitor starts to work on-line activation device, the voltage regulator effectively prevents the electrolytic capacitor from being electrified with larger voltage and current at the beginning of activation,
(5) Automatic stopping: the whole activation process only needs to measure the temperature of the device, when the temperature is too high, the operation switch is manually switched to the switching-off position, when the temperature is normal, no operation is needed, after the set activation time is reached, the activation device automatically cuts off the power supply, the frequency converter and the activation device are powered off,
(6) Activation is completed: after the operation of the activating device is stopped, the capacitor of the frequency converter body can already meet the power transmission use requirement, but at the moment, residual voltage still exists on the capacitor of the frequency converter body, and after personnel are required to carry corresponding protective appliances, the activating device circuit connected with the direct current bus of the frequency converter is detached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310105039.9A CN116388356A (en) | 2023-02-13 | 2023-02-13 | On-line activation device for capacitor of frequency converter body and application method of on-line activation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310105039.9A CN116388356A (en) | 2023-02-13 | 2023-02-13 | On-line activation device for capacitor of frequency converter body and application method of on-line activation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116388356A true CN116388356A (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310105039.9A Pending CN116388356A (en) | 2023-02-13 | 2023-02-13 | On-line activation device for capacitor of frequency converter body and application method of on-line activation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116388356A (en) |
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2023
- 2023-02-13 CN CN202310105039.9A patent/CN116388356A/en active Pending
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