CN116316642A - Electric device is rocked in defending with independently match mode - Google Patents
Electric device is rocked in defending with independently match mode Download PDFInfo
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- CN116316642A CN116316642A CN202211709659.5A CN202211709659A CN116316642A CN 116316642 A CN116316642 A CN 116316642A CN 202211709659 A CN202211709659 A CN 202211709659A CN 116316642 A CN116316642 A CN 116316642A
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention relates to a device with an autonomous matching mode for preventing interference electricity, which comprises an alternating current LN power supply, an AC/DC rectifying circuit, an operation controller circuit, a sampling circuit, a driving circuit, a 6-way electronic switch and an output port; the anti-interference electricity type device is further provided with an autonomous matching mode, when the contactor is in a closed state, impedance matching calculation, current matching calculation, voltage matching calculation, autonomous identification verification and normal operation matching are automatically and sequentially executed, corresponding switches of the 6-way electronic switch are subjected to opening and closing control according to interference electricity in the positive half cycle or the negative half cycle of the voltage, and the output voltage of the AC/DC rectification circuit is calculated and controlled according to the K value of the autonomous identification verification: the stability, the effectiveness and the applicability of the anti-interference device are improved, the current direction flowing through the coil of the contactor is guaranteed not to be overturned immediately, the contactor is guaranteed not to trip when interference electricity occurs in different half cycles, and the application effectiveness is improved.
Description
Technical Field
The invention belongs to the technical field of power systems, and particularly relates to a device for defending against electric interference in an autonomous matching mode.
Background
A large number of contactors are widely applied to power supply and distribution systems of industrial enterprises, and various types of motor control, production process control, valve control and the like are controlled through the contactors. However, the applicant found that: when the power supply and distribution system is in power shaking, various production processes can be stopped, a large amount of economic loss is caused, and even casualties caused by the stopping of the movable equipment can be caused; especially in batch process control, restarting the process typically takes hours or even days once the power sloshing can cause thousands of devices to be shut down. Therefore, when the electric interference occurs, various contactor devices are guaranteed to be continuously operated, and the electric interference control device has important practical significance when continuous operation is realized.
Moreover, when the existing alternating current power supply is used for switching to the direct current capacitor, an automatic identification function is lacked, the alternating current power supply cannot be applied to all types of alternating current contactors, meanwhile, the alternating current power supply is affected by randomness, the electric interference can occur in the positive half cycle of voltage or in the negative half cycle of voltage, if the direct current power supply is not synchronously updated in the direction of the direct current voltage, the problem that the contactor cannot be kept not to trip can be caused, and the anti-electric interference effect is lost.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a device for defending against electricity interference, which has an autonomous matching mode.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a defending interference electricity type device with an autonomous matching mode, which comprises an alternating current LN power supply, an alternating current/DC rectifying circuit, an operation controller circuit, a sampling circuit, a driving circuit, 6 paths of electronic switches and an output port, wherein the L pole and the N pole of the alternating current LN power supply are connected with the AC end of the alternating current/DC rectifying circuit, the operation controller circuit and 2 paths of switches in the 6 paths of electronic switches, the sampling circuit is connected with the operation controller circuit and the L pole and the N pole of the alternating current LN power supply, the current I1 of an LN loop and the output current I2 of the alternating current/DC rectifying circuit are collected, the driving circuit is connected with the 6 paths of electronic switches and the operation controller circuit, and the output port is connected with a coil of a contactor in a power supply and distribution system; the device for defending the electric interference is further provided with an autonomous matching mode, in the autonomous matching mode, when the contactor is in a closed state, an autonomous matching control method comprising impedance matching calculation, current matching calculation, voltage matching calculation, autonomous identification verification and normal operation matching is automatically executed, corresponding switches of the 6-way electronic switch are subjected to opening and closing control according to the electric interference in the positive half cycle or the negative half cycle of the voltage, and the output voltage of the AC/DC rectifying circuit is controlled by calculation of the K value of the autonomous identification verification.
Further, the 6-way electronic switch comprises switches K1-K6, the L pole and the N pole of the alternating current LN power supply are respectively connected with the switch K1 and the switch K2, the positive output end of the AC/DC rectifying circuit is connected with the switch K3 and the switch K6, the negative output end of the AC/DC rectifying circuit is connected with the switch K4 and the switch K5, the other end of the switch K3 is connected with the switch K1 in parallel, the other end of the switch K4 is connected with the switch K2 in parallel, the other end of the switch K5 is connected with the switch K1 in parallel, and the other end of the switch K6 is connected with the switch K2 in parallel.
Further, the autonomous matching control method includes:
s1, impedance matching calculation: collecting line voltages U of L pole and N pole of AC LN power supply and current I flowing through switch K1 and switch K2 loop 1 According to the formula
Obtaining the matching impedance Z, the equivalent resistance
Wherein R is equivalent resistance, X is equivalent reactance, phi is equivalent impedance angle;
s2, current matching calculation: current I collected according to S1 1 Calculate I 1 Root mean square effective value I 1_rms As a matching current;
s3, voltage matching calculation: matching impedance R and matching current I calculated from S1 and S2 1_rms The operation controller circuit controls the output voltage Udc of the AC/DC rectifying circuit to udc=k×i 1_rms * R, wherein k=0.5;
s4, autonomous identification and verification: detecting the line voltage U sampled by S1, opening and closing corresponding switches of the 6-way electronic switch in the positive half cycle or the negative half cycle of the voltage according to the interference electricity, and detecting and judging the output current I of the AC/DC rectifying circuit 2 Obtaining a K value of autonomous identification verification;
s5, normal operation matching: after the execution of S1 to S4 is completed, the device enters a normal operation mode, when the electric interference occurs, the switch K1 and the switch K2 are opened, if the electric interference occurs in the positive half cycle of the voltage, the switch K3 and the switch K4 are closed, and if the electric interference occurs in the negative half cycle of the voltage, the switch K5 and the switch K6 are closed, and the output voltage Udc of the AC/DC rectifying circuit is calculated and output by the K value obtained in S4.
Further, the autonomous identification check of S4 includes:
s4-1, detecting the line voltage U sampled by S1, opening the switch K1 and the switch K2 when the interference electricity is in the positive half cycle of the voltage, immediately closing the switch K3 and the switch K4, and then detecting the output current I2 of the AC/DC rectifying circuit, if I 2 |＞0.4I 1_rms Then the k value is stored as a default value, if not let k=k+0.1; then the switch K3 and the switch K4 are opened, the switch K1 and the switch K2 are closed, then the switch K1 and the switch K2 are opened again, the switch K3 and the switch K4 are closed immediately, and the output current I2 of the AC/DC rectifying circuit is detected again and is subjected to I 2 |＞0.4I 1_rms Judging, repeating the cycle until I 2 |＞0.4I 1_rms Until that is reached;
s4-2, detecting the line voltage U sampled by S1, opening the switch K1 and the switch K2 when the interference electricity is in the negative half cycle of the voltage, immediately closing the switch K5 and the switch K6, and then detecting the output current I2 of the AC/DC rectifying circuit, if I 2 |＞0.4I 1_rms The k value is stored as a default value; let k=k+0.1; the switch K5 and the switch K6 are then opened,and switch K1 and switch K2 are closed, after which switch K1 and switch K2 are re-opened, and switch K5 and switch K6 are immediately closed, and the output current I2 of the AC/DC rectifying circuit is again detected and |i is performed 2 |＞0.4I 1_rms Judging, repeating the cycle until I 2 |＞0.4I 1_rms Until that point.
The invention has the beneficial effects that:
(1) The impedance matching of the contactor coil is carried out, the current is maintained when the current corresponding to the direct current resistor is ensured to be switched from alternating current to direct current, the effective range in use is determined by utilizing the k value, and the stability, the effectiveness and the applicability of the anti-interference device are greatly improved;
(2) The randomness of the voltage when the voltage is in the interference electricity in the positive half cycle or the negative half cycle is met, the direct-current voltages with different polarities are ensured to be connected in the respective half cycles, the current direction flowing through the coil of the contactor is ensured not to be overturned immediately, the contactor is ensured not to trip when the interference electricity occurs in the different half cycles, and the application effectiveness is greatly improved.
Drawings
Fig. 1 is a schematic circuit diagram of a device for defending against electric interference with an autonomous matching mode according to the present invention;
fig. 2 is a flow chart of an autonomous matching control method in the device with autonomous matching mode for preventing interference.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, the device with an autonomous matching mode for preventing interference of electricity according to the present invention comprises an AC LN power supply 1, an AC/DC rectifying circuit 2, a computation controller circuit 3, a sampling circuit 4, a driving circuit 5, 6 electronic switches 6 and an output port 7, wherein the L pole and N pole of the AC LN power supply 1 are connected with the AC end of the AC/DC rectifying circuit 2, the computation controller circuit 3 and 2 switches in the 6 electronic switches 6, the sampling circuit 4 is connected with the computation controller circuit 3, the L pole and N pole of the AC LN power supply 1, and collects the current I1 of the LN loop and the output current I2 of the AC/DC rectifying circuit 2, the driving circuit 5 is connected with the 6 electronic switches 6 and the computation controller circuit 3, and the output port 7 is connected with the coil of the contactor 8 in the power supply and distribution system; the device for defending the electric interference is further provided with an autonomous matching mode, in the autonomous matching mode, when the contactor is in a closed state, an autonomous matching control method comprising impedance matching calculation, current matching calculation, voltage matching calculation, autonomous identification verification and normal operation matching is automatically executed, corresponding switches of the 6-way electronic switch 6 are opened and closed according to the electric interference in the positive half cycle or the negative half cycle of the voltage, and the output voltage of the AC/DC rectifying circuit 2 is controlled by calculation of the K value of the autonomous identification verification.
The sampling circuit 4 may use a current sensor or a series circuit to collect the voltage generated by the current flowing through the resistor; the 6-way electronic switch 6 comprises switches K1-K6, the L pole and the N pole of the alternating current LN power supply 1 are respectively connected with the switch K1 and the switch K2, the positive output end of the AC/DC rectifying circuit 2 is connected with the switch K3 and the switch K6, the negative output end is connected with the switch K4 and the switch K5, the other end of the switch K3 is connected with the switch K1 in parallel, the other end of the switch K4 is connected with the switch K2 in parallel, the other end of the switch K5 is connected with the switch K1 in parallel, and the other end of the switch K6 is connected with the switch K2 in parallel.
As shown in fig. 2, the autonomous matching control method of the present invention includes:
s1, impedance matching calculation: collecting line voltages U of L pole and N pole of AC LN power supply 1 and current I flowing through switch K1 and switch K2 loop 1 According to the formula
Obtaining the matching impedance Z, the equivalent resistance
Wherein R is an equivalent resistance, X is an equivalent reactance, and phi is an equivalent impedance angle.
S2, currentMatching calculation: the current I collected according to step S1 1 Calculate I 1 Root mean square effective value I 1_rms As a matching current.
S3, voltage matching calculation: matching impedance R and matching current I calculated according to steps S1 and S2 1_rms The arithmetic controller circuit 3 controls the output voltage Udc of the AC/DC rectifying circuit 2 to udc=kχi 1_rms * R, wherein k=0.5;
s4, autonomous identification and verification: detecting the line voltage U sampled in the step S1, opening and closing corresponding switches of the 6-way electronic switch 6 according to the interference electricity in the positive half cycle or the negative half cycle of the voltage, and detecting and judging the output current I2 of the AC/DC rectifying circuit 2 to obtain an autonomous identification and verification K value; the method specifically comprises the following steps:
s4-1. Detecting the line voltage U sampled in the step S1, opening the switch K1 and the switch K2 when the interference electricity is in the positive half cycle of the voltage, immediately closing the switch K3 and the switch K4, and then detecting the output current I2 of the AC/DC rectifying circuit 2, if I 2 |＞0.4I 1_rms Then the k value is stored as a default value, if not let k=k+0.1; then the switch K3 and the switch K4 are opened and the switch K1 and the switch K2 are closed, then the switch K1 and the switch K2 are opened again and the switch K3 and the switch K4 are closed immediately, and the output current I2 of the AC/DC rectifying circuit 2 is detected again and |i is performed 2 |＞0.4I 1_rms Judging, repeating the cycle until I 2 |＞0.4I 1_rms Until that is reached;
s4-2 detecting the line voltage U sampled in the step S1, opening the switch K1 and the switch K2 when the interference electricity is in the negative half cycle of the voltage, immediately closing the switch K5 and the switch K6, and then detecting the output current I2 of the AC/DC rectifying circuit 2, if I 2 |＞0.4I 1_rms The k value is stored as a default value; let k=k+0.1; then the switch K5 and the switch K6 are opened and the switch K1 and the switch K2 are closed, then the switch K1 and the switch K2 are opened again and the switch K5 and the switch K6 are closed immediately, and the output current I2 of the AC/DC rectifying circuit 2 is detected again and |i is performed 2 |＞0.4I 1_rms Judging, repeating the cycle until I 2 |＞0.4I 1_rms Until that point.
Because ofk starts from 0.5, the theory should be I 2 |≥0.5I 1_rms However, in order to avoid measurement errors, it is determined as |I 2 |＞0.4I 1_rms This value is only for limiting the current that can be maintained without tripping the contactor when the AC/DC rectification module is supplying power to the contactor, and is determined to be greater than 0, with I 2 |＞0.4I 1_rms Measurement errors can be effectively avoided.
S5, normal operation matching: after the execution of steps S1 to S4 is completed, the device enters a normal operation mode, when the electric interference occurs, the switch K1 and the switch K2 are opened, if the electric interference occurs in the positive half cycle of the voltage, the switch K3 and the switch K4 are closed, and if the electric interference occurs in the negative half cycle of the voltage, the switch K5 and the switch K6 are closed, and the output voltage Udc of the AC/DC rectifying circuit 2 is calculated and output by the K value obtained in S4.
Therefore, according to the technical scheme, on one hand, the anti-interference device can perform impedance matching of the contactor coil, current corresponding to the direct current resistor is ensured to be maintained when the alternating current is switched to the direct current, the k value is utilized to determine the effective range in use, and the stability, the effectiveness and the applicability of the anti-interference device are greatly improved; the randomness of the voltage when the voltage is in the power-on oscillation in the positive half cycle or the negative half cycle can be met, the direct-current voltages with different polarities are ensured to be connected in the respective half cycles, the current direction flowing through the coil of the contactor is ensured not to be overturned immediately, the contactor is ensured not to trip when the power-on oscillation occurs in the different half cycles, and the application effectiveness is greatly improved.
Therefore, the anti-interference electricity device disclosed by the invention can be adapted to multiple types of alternating-current contactors, and the impedance characteristics of the contactors are automatically adapted, so that the applicability and the practicability of the anti-interference electricity device are greatly improved, the field debugging time can be obviously degraded, and the application flexibility is improved.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (4)
1. The anti-interference device with the autonomous matching mode is characterized by comprising an alternating current LN power supply, an AC/DC rectifying circuit, an operation controller circuit, a sampling circuit, a driving circuit, 6 paths of electronic switches and an output port, wherein the L pole and the N pole of the alternating current LN power supply are connected with an AC end of the AC/DC rectifying circuit, the operation controller circuit and 2 paths of switches in the 6 paths of electronic switches, the sampling circuit is connected with the operation controller circuit and the L pole and the N pole of the alternating current LN power supply, the current I1 of an LN loop and the output current I2 of the AC/DC rectifying circuit are collected, the driving circuit is connected with the 6 paths of electronic switches and the operation controller circuit, and the output port is connected with a coil of a contactor in a power supply and distribution system; the device for defending the electric interference is further provided with an autonomous matching mode, in the autonomous matching mode, when the contactor is in a closed state, an autonomous matching control method comprising impedance matching calculation, current matching calculation, voltage matching calculation, autonomous identification verification and normal operation matching is automatically executed, corresponding switches of the 6-way electronic switch are subjected to opening and closing control according to the electric interference in the positive half cycle or the negative half cycle of the voltage, and the output voltage of the AC/DC rectifying circuit is controlled by calculation of the K value of the autonomous identification verification.
2. The device according to claim 1, wherein the 6-way electronic switch comprises switches K1 to K6, the L pole and N pole of the AC LN power supply are connected to the switch K1 and the switch K2, respectively, the positive output terminal of the AC/DC rectifying circuit is connected to the switch K3 and the switch K6, the negative output terminal is connected to the switch K4 and the switch K5, the other end of the switch K3 is connected in parallel to the switch K1, the other end of the switch K4 is connected in parallel to the switch K2, the other end of the switch K5 is connected in parallel to the switch K1, and the other end of the switch K6 is connected in parallel to the switch K2.
3. The apparatus of claim 2, wherein the autonomous matching control method comprises:
s1, impedance matching calculation: collecting line voltages U of L pole and N pole of AC LN power supply and flowing through circuits of switch K1 and switch K2Current I 1 According to the formula
Obtaining the matching impedance Z, the equivalent resistance
Wherein R is equivalent resistance, X is equivalent reactance, phi is equivalent impedance angle;
s2, current matching calculation: current I collected according to S1 1 Calculate I 1 Root mean square effective value I 1_rms As a matching current;
s3, voltage matching calculation: matching impedance R and matching current I calculated from S1 and S2 1_rms The operation controller circuit controls the output voltage Udc of the AC/DC rectifying circuit to udc=k×i 1_rms * R, wherein k=0.5;
s4, autonomous identification and verification: detecting the line voltage U sampled by S1, opening and closing corresponding switches of the 6-way electronic switch in the positive half cycle or the negative half cycle of the voltage according to the interference electricity, and detecting and judging the output current I of the AC/DC rectifying circuit 2 Obtaining a K value of autonomous identification verification;
s5, normal operation matching: after the execution of S1 to S4 is completed, the device enters a normal operation mode, when the electric interference occurs, the switch K1 and the switch K2 are opened, if the electric interference occurs in the positive half cycle of the voltage, the switch K3 and the switch K4 are closed, and if the electric interference occurs in the negative half cycle of the voltage, the switch K5 and the switch K6 are closed, and the output voltage Udc of the AC/DC rectifying circuit is calculated and output by the K value obtained in S4.
4. The apparatus of claim 3, wherein the autonomous identification check of S4 comprises:
s4-1, detecting the line voltage U sampled by S1, opening the switch K1 and the switch K2 when the interference electricity is in the positive half cycle of the voltage, immediately closing the switch K3 and the switch K4, and then detecting the output current I2 of the AC/DC rectifying circuit, if I 2 |＞0.4I 1_rms Then the k value is stored as a default value, if not let k=k+0.1; switch K3 and switch K4 are then opened and closedClosing the switch K1 and the switch K2, then re-opening the switch K1 and the switch K2, immediately closing the switch K3 and the switch K4, and detecting the output current I2 of the AC/DC rectifying circuit again and performing I 2 |＞0.4I 1_rms Judging, repeating the cycle until I 2 |＞0.4I 1_rms Until that is reached;
s4-2, detecting the line voltage U sampled by S1, opening the switch K1 and the switch K2 when the interference electricity is in the negative half cycle of the voltage, immediately closing the switch K5 and the switch K6, and then detecting the output current I2 of the AC/DC rectifying circuit, if I 2 |＞0.4I 1_rms The k value is stored as a default value; let k=k+0.1; then the switch K5 and the switch K6 are opened, the switch K1 and the switch K2 are closed, then the switch K1 and the switch K2 are opened again, the switch K5 and the switch K6 are closed immediately, and the output current I2 of the AC/DC rectifying circuit is detected again and is subjected to I 2 |＞0.4I 1_rms Judging, repeating the cycle until I 2 |＞0.4I 1_rms Until that point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211709659.5A CN116316642A (en) | 2022-12-29 | 2022-12-29 | Electric device is rocked in defending with independently match mode |
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| CN202211709659.5A CN116316642A (en) | 2022-12-29 | 2022-12-29 | Electric device is rocked in defending with independently match mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117220241A (en) * | 2023-11-09 | 2023-12-12 | 深圳市中电电力技术股份有限公司 | Self-adaptive motor control loop anti-interference device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117220241A (en) * | 2023-11-09 | 2023-12-12 | 深圳市中电电力技术股份有限公司 | Self-adaptive motor control loop anti-interference device and method |
| CN117220241B (en) * | 2023-11-09 | 2024-04-05 | 深圳市中电电力技术股份有限公司 | Self-adaptive motor control loop anti-interference device and method |
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