CN218887001U - Intelligent capacitor - Google Patents

Intelligent capacitor Download PDF

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Publication number
CN218887001U
CN218887001U CN202222077907.0U CN202222077907U CN218887001U CN 218887001 U CN218887001 U CN 218887001U CN 202222077907 U CN202222077907 U CN 202222077907U CN 218887001 U CN218887001 U CN 218887001U
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China
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capacitor
compensation
active filter
operational amplifier
diode
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CN202222077907.0U
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王建华
朱立翔
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Wuhan Dashengyuan Electric Power Co ltd
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Wuhan Dashengyuan Electric Power Co ltd
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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
    • 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
    • Y02E40/40—Arrangements for reducing harmonics

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Abstract

The utility model relates to an intelligent capacitor, including mending the capacitor bank altogether, mend the capacitor fling-cut switch altogether, divide to mend the capacitor bank, mend the capacitor fling-cut switch altogether, mend the active filter group altogether, mend the active filter fling-cut switch altogether, divide to mend the active filter group, mend the active filter fling-cut switch, three-phase current transformer, three-phase voltage transformer and controller separately. The utility model adopts the common compensation capacitor and the sub compensation capacitor bank, which can carry out the common compensation alone, the sub compensation alone and the mixed compensation under the control of the controller, thereby having better reactive compensation effect; meanwhile, a co-compensation active filter group and a sub-compensation active filter group are arranged in the intelligent capacitor, the active filter is an electronic device for dynamically inhibiting harmonic waves and compensating reactive power, harmonic three-phase common inhibition can be carried out independently under the control of the controller, harmonic single-phase inhibition can also be carried out independently, and harmonic mixed inhibition can also be carried out, so that the intelligent capacitor has a better harmonic inhibition function.

Description

Intelligent capacitor
Technical Field
The utility model relates to an electrical equipment field, concretely relates to intelligent condenser.
Background
The intelligent capacitor integrates advanced technologies such as modern measurement and control, power electronics, network communication, automatic control, power capacitors and the like. The backward controller technology of the traditional reactive power compensation device and the backward switching technology of a mechanical contactor or a mechatronic switch as a switching capacitor are changed, and the bulky and heavy structural mode of the traditional reactive power compensation device are changed, so that the new generation of low-voltage reactive power compensation equipment has the characteristics of better compensation effect, smaller volume, lower power consumption, lower price, more cost saving, more flexibility in use, more convenience in maintenance, longer service life and higher reliability, and is suitable for the higher requirement of the modern power grid on reactive power compensation. However, with the use of a large number of nonlinear loads, the harmonic pollution of the power grid becomes increasingly serious, and the current smart capacitor focuses on reactive compensation and is not ideal in harmonic suppression effect. Smart capacitors therefore now have to be improved with respect to harmonic suppression.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an intelligent capacitor is provided, fine reactive compensation effect not only has, good harmonic suppression still has.
The utility model provides an above-mentioned technical problem's technical scheme as follows: an intelligent capacitor comprises a co-compensation capacitor group, a co-compensation capacitor fling-cut switch, a sub-compensation capacitor group, a sub-compensation capacitor fling-cut switch, a co-compensation active filter group, a co-compensation active filter fling-cut switch, a sub-compensation active filter group, a sub-compensation active filter fling-cut switch, a three-phase current transformer, a three-phase voltage transformer and a controller; the primary windings of the three-phase current transformers are connected in series with three phases of a power grid, the primary windings of the three-phase voltage transformers are connected in parallel with the three phases of the power grid, and the secondary windings of the three-phase current transformers and the secondary windings of the three-phase voltage transformers are connected with the signal input end of the controller; the compensation capacitor bank is connected to three phases of a power grid through the compensation capacitor switching switch, the compensation capacitor bank is connected to three phases of the power grid through the compensation capacitor switching switch, the compensation active filter bank is connected to three phases of the power grid through the compensation active filter switching switch, and the compensation active filter bank is connected to three phases of the power grid through the compensation active filter switching switch; and the controlled end of the switching switch of the common compensation capacitor, the controlled end of the switching switch of the sub compensation capacitor, the controlled end of the switching switch of the common compensation active filter and the controlled end of the switching switch of the sub compensation active filter are connected to the signal output end of the controller.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, a common compensation reactor is connected in series between the common compensation capacitor bank and the common compensation capacitor switching switch, and a branch compensation reactor is connected in series between the branch compensation capacitor bank and the branch compensation capacitor switching switch.
Furthermore, the common compensation reactor and the sub compensation reactor are combined together through a common iron yoke to form an integrated reactor.
Further, the controller comprises a current signal processing circuit, a voltage signal processing circuit, a signal conditioning circuit and a microprocessor; the input end of the current signal processing circuit is connected with the secondary winding of the three-phase current transformer, the input end of the voltage signal processing circuit is connected with the secondary winding of the three-phase voltage transformer, the output end of the current signal processing circuit and the output end of the voltage signal processing circuit are connected with the signal input end of the microprocessor through the signal processing circuit, and the signal output end of the microprocessor is respectively connected with the controlled end of the compensation capacitor switching switch, the controlled end of the compensation active filter switching switch and the controlled end of the compensation active filter switching switch.
Further, the current signal processing circuit comprises a resistor R1, a resistor R2, a resistor R3, a capacitor C1 and an operational amplifier A1; resistance R1's one end and resistance R2's one end all with three phase current transformer's secondary winding one end is connected, resistance R1's the other end and three phase current transformer's the secondary winding other end is all ground connection, resistance R2's the other end passes through electric capacity C1 ground connection, resistance R2's the other end still passes through resistance R3 is connected on operational amplifier A1's the in-phase input end, operational amplifier A1's reverse input with operational amplifier A1's output is connected, operational amplifier A1's output with signal conditioning circuit's input is connected.
Further, the voltage signal processing circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a capacitor C2, a capacitor C3, a capacitor C4, a unidirectional silicon controlled rectifier VS and an optocoupler OC; resistance R4 with connect after resistance R5 establishes ties three phase voltage transformer's secondary winding both ends, three phase voltage transformer's secondary winding one end is passed through resistance R6 is connected on opto-coupler OC's anodal input, three phase voltage transformer's secondary winding other end ground connection passes through one-way silicon controlled rectifier VS connects on opto-coupler OC's the negative pole input, opto-coupler OC's negative pole input is still through establishing ties electric capacity C2 with resistance R7 is connected resistance R4 with on resistance R5's the public link, electric capacity C2 with resistance R7's the public link with on one-way silicon controlled rectifier VS's the controlled end, opto-coupler OC's projecting pole output passes through resistance R8 ground connection, opto-coupler OC's projecting pole output is still through establishing ties resistance R9 with electric capacity C3 is connected on signal conditioning circuit's the input, opto-coupler OC's collecting electrode output is through establishing ties resistance R10 with electric capacity C4 ground connection.
Further, the signal conditioning circuit comprises a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, an operational amplifier A2, a diode D1, a diode D2, a diode D3 and a diode D4; the inverting input end of the operational amplifier A2 is connected to the output end of the current signal processing circuit through the capacitor C5, the non-inverting input end of the operational amplifier A2 is connected to the output end of the voltage signal processing circuit through the capacitor C6, the inverting input end of the operational amplifier A2 is connected to the non-inverting output end of the operational amplifier A2 through the capacitor C7, and the non-inverting input end of the operational amplifier A2 is connected to the inverting output end of the operational amplifier A2 through the capacitor C8; the in-phase output end of the operational amplifier A2 is further connected to the 3.3V power supply through the diode D1, the in-phase output end of the operational amplifier A2 is grounded through the diode D2, the reverse phase output end of the operational amplifier A2 is further connected to the 3.3V power supply through the diode D4, and the reverse phase output end of the operational amplifier A2 is grounded through the diode D3.
Further, the diode D1, the diode D2, the diode D3, and the diode D4 are all voltage regulator diodes; the non-inverting output end of the operational amplifier A2 is connected with the anode of the diode D1 and the cathode of the diode D2; the inverting output end of the operational amplifier A2 is connected with the anode of the diode D4 and connected with the cathode of the diode D3.
Further, the microprocessor is specifically a 51-chip microcomputer.
Further, the switching switch of the common compensation capacitor and the switching switch of the common compensation active filter are both complementary silicon controlled rectifiers; and the compensation capacitor switching switch and the compensation active filter switching switch are compensation type silicon controlled rectifiers.
The beneficial effects of the utility model are that: the utility model relates to an intelligent capacitor which adopts a common compensation capacitor and a sub compensation capacitor group, can carry out common compensation independently under the control of a controller, can carry out sub compensation independently, and can also carry out mixed compensation, so that the reactive compensation effect is better; meanwhile, a co-compensation active filter group and a sub-compensation active filter group are arranged in the intelligent capacitor, the active filter is an electronic device for dynamically inhibiting harmonic waves and compensating reactive power, harmonic three-phase common inhibition can be carried out independently under the control of the controller, harmonic single-phase inhibition can also be carried out independently, and harmonic mixed inhibition can also be carried out, so that the intelligent capacitor has a better harmonic inhibition function.
Drawings
Fig. 1 is an overall structure diagram of an intelligent capacitor according to the present invention;
fig. 2 is a block diagram of a controller in an intelligent capacitor according to the present invention;
fig. 3 is a schematic diagram of a current signal processing circuit in an intelligent capacitor according to the present invention;
fig. 4 is a schematic diagram of a voltage signal processing circuit in an intelligent capacitor according to the present invention;
fig. 5 is the utility model relates to a schematic diagram of signal conditioning circuit among intelligent capacitor.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, an intelligent capacitor includes a compensation capacitor bank, a compensation capacitor fling-cut switch, a compensation active filter bank, a compensation active filter fling-cut switch, a three-phase current transformer, a three-phase voltage transformer and a controller; the primary windings of the three-phase current transformers are connected in series with three phases of a power grid, the primary windings of the three-phase voltage transformers are connected in parallel with the three phases of the power grid, and the secondary windings of the three-phase current transformers and the secondary windings of the three-phase voltage transformers are connected with the signal input end of the controller; the compensation capacitor bank is connected to three phases of a power grid through the compensation capacitor switching switch, the compensation capacitor bank is connected to three phases of the power grid through the compensation capacitor switching switch, the compensation active filter bank is connected to three phases of the power grid through the compensation active filter switching switch, and the compensation active filter bank is connected to three phases of the power grid through the compensation active filter switching switch; and the controlled end of the switching switch of the common compensation capacitor, the controlled end of the switching switch of the sub compensation capacitor, the controlled end of the switching switch of the common compensation active filter and the controlled end of the switching switch of the sub compensation active filter are connected to the signal output end of the controller.
The utility model relates to an among the intelligent capacitor, three phase current transformer and three phase voltage transformer are used for gathering three phase current and three phase voltage, the controller basis, whether harmonic and three phase are unbalanced in the three phase are judged out to the three phase current that three phase current transformer gathered and the three phase voltage that three phase voltage transformer gathered, according to the size and the three-phase unbalance degree of harmonic, control is mended capacitor fling-cut switch altogether or/and is mended the capacitor bank altogether with the closed messenger of branch of benefit capacitor bank or/and is mended the capacitor bank with the branch and put into in order to carry out reactive compensation, or/and, control is mended active filter fling-cut switch altogether or/and is mended active filter fling-cut switch closure altogether and makes and mended active filter bank altogether or/and is mended active filter bank with the branch and put into in order to carry out the harmonic and restrain. In addition, the active filter bank also has the reactive compensation function, and the reactive compensation with better effect can be realized through the matching of the active filter bank and the capacitor bank.
In this particular embodiment: and a common compensation reactor is connected in series between the common compensation capacitor bank and the common compensation capacitor switching switch, and a branch compensation reactor is connected in series between the branch compensation capacitor bank and the branch compensation capacitor switching switch. Specifically, the common compensation reactor and the sub compensation reactors are combined together through a common iron yoke to form an integrated reactor.
The arrangement of the co-compensation reactor and the sub-compensation reactor can be additionally provided with a temperature control switch for over-temperature automatic protection, and can also inhibit harmonic waves and inrush current, so that the safe operation of the intelligent capacitor is ensured. The integrated reactor has smaller volume relative to the two reactors, so that the volume of the intelligent capacitor can be reduced.
In this particular embodiment: as shown in fig. 2, the controller includes a current signal processing circuit, a voltage signal processing circuit, a signal conditioning circuit, and a microprocessor; the input of the current signal processing circuit is connected with the secondary winding of the three-phase current transformer, the input of the voltage signal processing circuit is connected with the secondary winding of the three-phase voltage transformer, the output of the current signal processing circuit and the output of the voltage signal processing circuit are connected with the signal input end of the microprocessor through the signal processing circuit, and the signal output end of the microprocessor is respectively connected with the controlled end of the complementary capacitor switching switch, the controlled end of the complementary active filter switching switch and the controlled end of the complementary active filter switching switch.
In this particular embodiment: as shown in fig. 3, the current signal processing circuit includes a resistor R1, a resistor R2, a resistor R3, a capacitor C1, and an operational amplifier A1; resistance R1's one end and resistance R2's one end all with three phase current transformer's secondary winding one end is connected, resistance R1's the other end and three phase current transformer's the secondary winding other end is all ground connection, resistance R2's the other end passes through electric capacity C1 ground connection, resistance R2's the other end still passes through resistance R3 is connected on operational amplifier A1's the in-phase input end, operational amplifier A1's reverse input with operational amplifier A1's output is connected, operational amplifier A1's output with signal conditioning circuit's input is connected.
The current signal processing circuit converts the three-phase current analog signals detected by the three-phase current transformer into voltage signals which can be processed by the microprocessor. In this embodiment, three current signal processing circuits are provided, and one current signal processing circuit is correspondingly connected to the rear of each phase current transformer.
In this particular embodiment: as shown in fig. 4, the voltage signal processing circuit includes a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a capacitor C2, a capacitor C3, a capacitor C4, a unidirectional thyristor VS, and an optocoupler OC; resistance R4 with connect after resistance R5 establishes ties three phase voltage transformer's secondary winding both ends, three phase voltage transformer's secondary winding one end is passed through resistance R6 is connected on the anodal input of opto-coupler OC, three phase voltage transformer's secondary winding other end ground connection passes through one-way silicon controlled rectifier VS connects on the negative pole input of opto-coupler OC, opto-coupler OC's negative pole input is still through establishing ties electric capacity C2 and resistance R7 is connected resistance R4 with on resistance R5's the common connection end, electric capacity C2 with resistance R7's common connection end with on one-way silicon controlled rectifier VS's the controlled end, opto-coupler OC's projecting pole output passes through resistance R8 ground connection, opto-coupler OC's projecting pole output is still through establishing ties resistance R9 with electric capacity C3 is connected on signal conditioning circuit's the input, opto-coupler OC's collecting electrode output is through establishing ties resistance R10 and electric capacity C4 ground connection.
The voltage signal processing circuit adopts the one-way thyristor to collect and process the three-phase voltage signals collected by the three-phase voltage transformer and reduce the voltage so that the microprocessor can process the signals, and the opto-coupler is matched to carry out signal isolation control, so that the anti-electromagnetic interference capability is strong. In this embodiment, three voltage signal processing circuits are provided, and one voltage signal processing circuit is correspondingly connected behind each phase voltage transformer.
In this particular embodiment: as shown in fig. 5, the signal conditioning circuit includes a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, an operational amplifier A2, a diode D1, a diode D2, a diode D3, and a diode D4; the inverting input end of the operational amplifier A2 is connected to the output end of the current signal processing circuit through the capacitor C5, the non-inverting input end of the operational amplifier A2 is connected to the output end of the voltage signal processing circuit through the capacitor C6, the inverting input end of the operational amplifier A2 is connected to the non-inverting output end of the operational amplifier A2 through the capacitor C7, and the non-inverting input end of the operational amplifier A2 is connected to the inverting output end of the operational amplifier A2 through the capacitor C8; the in-phase output end of the operational amplifier A2 is connected to a 3.3V power supply through the diode D1, the in-phase output end of the operational amplifier A2 is grounded through the diode D2, the reverse phase output end of the operational amplifier A2 is connected to the 3.3V power supply through the diode D4, and the reverse phase output end of the operational amplifier A2 is grounded through the diode D3. Specifically, the diode D1, the diode D2, the diode D3, and the diode D4 are all voltage regulator diodes; the non-inverting output end of the operational amplifier A2 is connected with the anode of the diode D1 and the cathode of the diode D2; and the inverting output end of the operational amplifier A2 is connected with the anode of the diode D4 and the cathode of the diode D3.
The signal conditioning circuit carries out double sampling and holding on the signal output by the current processing circuit and the signal output by the voltage processing circuit, can dynamically monitor the three-phase unbalance and harmonic waves, and provides a reliable basis for the microprocessor to control switching.
In this particular embodiment: the microprocessor is specifically a 51-chip microcomputer.
In this particular embodiment: the switching switch of the co-compensation capacitor and the switching switch of the co-compensation active filter are both co-compensation type silicon controlled rectifiers; and the compensation capacitor switching switch and the compensation active filter switching switch are compensation type silicon controlled rectifiers.
The utility model relates to an intelligent capacitor adopts the capacitor group of mending altogether and mending separately, can mend altogether alone under the control of the controller, can mend separately either, can also carry on the mixed compensation alone, therefore the reactive compensation effect is better; meanwhile, a co-compensation active filter group and a sub-compensation active filter group are arranged in the intelligent capacitor, the active filter is an electronic device for dynamically inhibiting harmonic waves and compensating reactive power, harmonic three-phase common inhibition can be independently carried out under the control of the controller, harmonic single-phase inhibition can also be independently carried out, and harmonic mixed inhibition can also be carried out, so that the intelligent capacitor has a better harmonic inhibition function.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. An intelligent capacitor, its characterized in that: the system comprises a common compensation capacitor bank, a common compensation capacitor fling-cut switch, a sub-compensation capacitor bank, a sub-compensation capacitor fling-cut switch, a common compensation active filter bank, a common compensation active filter fling-cut switch, a sub-compensation active filter bank, a sub-compensation active filter fling-cut switch, a three-phase current transformer, a three-phase voltage transformer and a controller; the primary windings of the three-phase current transformers are connected in series with three phases of a power grid, the primary windings of the three-phase voltage transformers are connected in parallel with the three phases of the power grid, and the secondary windings of the three-phase current transformers and the secondary windings of the three-phase voltage transformers are connected to a signal input end of the controller; the compensation capacitor bank is connected to three phases of a power grid through the compensation capacitor switching switch, the compensation capacitor bank is connected to the three phases of the power grid through the compensation capacitor switching switch, the compensation active filter bank is connected to the three phases of the power grid through the compensation active filter switching switch, and the compensation active filter bank is connected to the three phases of the power grid through the compensation active filter switching switch; and the controlled end of the switching switch of the common compensation capacitor, the controlled end of the switching switch of the sub-compensation capacitor, the controlled end of the switching switch of the common compensation active filter and the controlled end of the switching switch of the sub-compensation active filter are connected to the signal output end of the controller.
2. The smart capacitor of claim 1, wherein: and a common compensation reactor is connected in series between the common compensation capacitor bank and the common compensation capacitor switching switch, and a branch compensation reactor is connected in series between the branch compensation capacitor bank and the branch compensation capacitor switching switch.
3. The smart capacitor of claim 2, wherein: the common compensation reactor and the branch compensation reactors are combined together through a common iron yoke to form an integrated reactor.
4. The smart capacitor of any one of claims 1-3, wherein: the controller comprises a current signal processing circuit, a voltage signal processing circuit, a signal conditioning circuit and a microprocessor; the input of the current signal processing circuit is connected with the secondary winding of the three-phase current transformer, the input of the voltage signal processing circuit is connected with the secondary winding of the three-phase voltage transformer, the output of the current signal processing circuit and the output of the voltage signal processing circuit are connected with the signal input end of the microprocessor through the signal processing circuit, and the signal output end of the microprocessor is respectively connected with the controlled end of the complementary capacitor switching switch, the controlled end of the complementary active filter switching switch and the controlled end of the complementary active filter switching switch.
5. The smart capacitor of claim 4, wherein: the current signal processing circuit comprises a resistor R1, a resistor R2, a resistor R3, a capacitor C1 and an operational amplifier A1; resistance R1's one end and resistance R2's one end all with three phase current transformer's secondary winding one end is connected, resistance R1's the other end and three phase current transformer's the secondary winding other end is all ground connection, resistance R2's the other end passes through electric capacity C1 ground connection, resistance R2's the other end still passes through resistance R3 is connected on operational amplifier A1's the in-phase input end, operational amplifier A1's reverse input with operational amplifier A1's output is connected, operational amplifier A1's output with signal conditioning circuit's input is connected.
6. The smart capacitor of claim 4, wherein: the voltage signal processing circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a capacitor C2, a capacitor C3, a capacitor C4, a unidirectional silicon controlled rectifier VS and an optocoupler OC; resistance R4 with connect after resistance R5 establishes ties three phase voltage transformer's secondary winding both ends, three phase voltage transformer's secondary winding one end is passed through resistance R6 is connected on the anodal input of opto-coupler OC, three phase voltage transformer's secondary winding other end ground connection passes through one-way silicon controlled rectifier VS connects on the negative pole input of opto-coupler OC, opto-coupler OC's negative pole input is still through establishing ties electric capacity C2 and resistance R7 is connected resistance R4 with on resistance R5's the common connection end, electric capacity C2 with resistance R7's common connection end with on one-way silicon controlled rectifier VS's the controlled end, opto-coupler OC's projecting pole output passes through resistance R8 ground connection, opto-coupler OC's projecting pole output is still through establishing ties resistance R9 with electric capacity C3 is connected on signal conditioning circuit's the input, opto-coupler OC's collecting electrode output is through establishing ties resistance R10 and electric capacity C4 ground connection.
7. The smart capacitor of claim 4, wherein: the signal conditioning circuit comprises a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, an operational amplifier A2, a diode D1, a diode D2, a diode D3 and a diode D4; the inverting input end of the operational amplifier A2 is connected to the output end of the current signal processing circuit through the capacitor C5, the non-inverting input end of the operational amplifier A2 is connected to the output end of the voltage signal processing circuit through the capacitor C6, the inverting input end of the operational amplifier A2 is connected to the non-inverting output end of the operational amplifier A2 through the capacitor C7, and the non-inverting input end of the operational amplifier A2 is connected to the inverting output end of the operational amplifier A2 through the capacitor C8; the in-phase output end of the operational amplifier A2 is further connected to the 3.3V power supply through the diode D1, the in-phase output end of the operational amplifier A2 is grounded through the diode D2, the reverse phase output end of the operational amplifier A2 is further connected to the 3.3V power supply through the diode D4, and the reverse phase output end of the operational amplifier A2 is grounded through the diode D3.
8. The smart capacitor of claim 7, wherein: the diode D1, the diode D2, the diode D3 and the diode D4 are all voltage-stabilizing diodes; the non-inverting output end of the operational amplifier A2 is connected with the anode of the diode D1 and the cathode of the diode D2; and the inverting output end of the operational amplifier A2 is connected with the anode of the diode D4 and the cathode of the diode D3.
9. The smart capacitor of claim 4, wherein: the microprocessor is specifically a 51-chip microcomputer.
10. The smart capacitor of any one of claims 1-3, 5-9, wherein: the common compensation capacitor switching switch and the common compensation active filter switching switch are both a common compensation type silicon controlled rectifier; and the compensation capacitor switching switch and the compensation active filter switching switch are compensation type silicon controlled rectifiers.
CN202222077907.0U 2022-08-05 2022-08-05 Intelligent capacitor Active CN218887001U (en)

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CN202222077907.0U CN218887001U (en) 2022-08-05 2022-08-05 Intelligent capacitor

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Application Number Priority Date Filing Date Title
CN202222077907.0U CN218887001U (en) 2022-08-05 2022-08-05 Intelligent capacitor

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CN218887001U true CN218887001U (en) 2023-04-18

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