CN204578096U - Low-voltage active electric power filter control system - Google Patents
Low-voltage active electric power filter control system Download PDFInfo
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- CN204578096U CN204578096U CN201520239138.7U CN201520239138U CN204578096U CN 204578096 U CN204578096 U CN 204578096U CN 201520239138 U CN201520239138 U CN 201520239138U CN 204578096 U CN204578096 U CN 204578096U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/20—Active power filtering [APF]
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Abstract
The utility model relates to low-voltage active electric power filter control system, comprises precharge plate module, transformer, offset current detection module, grid side current detection module, high frequency filtering module, capacitance voltage detection module, DRC module, low-voltage active electric power filter master control borad, scram button module, main fuse, main contactor, flat ripple reactance, current-limiting reactor, dc-link capacitance, master control circuit breaker, Switching Power Supply, lightning protection device.Adopt the classical control strategy of parallel connection type APF, control DSP module by core and real time dynamic tracing and detection are carried out to system I/O loop voltage, electric current, the method for difference comparsion; Calculate harmonic current components, reactive current component, control to export PWM; Described pwm signal, by drive unit, carries out drived control and generates offset current, inject electrical network; Offset with the humorous reactive current that involves in electrical network, reach the object of compensation.
Description
Technical field
The utility model belongs to electric and electronic technical field, particularly relates to APF low-voltage active electric power filtering technique.
Background technology
The expansion that harmonic pollution in electric power net problem is applied along with power electronic technology, as widely used electron rectifier, frequency converter, UPS, frequency-conversion domestic electric appliances, electricity-saving lamp, photocopier, household electrical appliance etc., these nonlinear loads can produce a large amount of harmonic currents and be injected in electrical network, make line voltage produce distortion, thus make mains by harmonics problem day by day serious.This harmonic wave " pollution " does not still affect the key factor of power system security and the quality of power supply, also considerably increase grid loss, interference is caused to other power consumption equipment simultaneously, cause electrical network resonance, the overvoltage of initiation potential or overcurrent, cause the damage of electric component and equipment.
Traditional passive filtration unit affects greatly by system parameters, can only the specific subharmonic of fixed compensation, easily produces resonance; And existing electric-power filter affects greatly by electrical network parameter, unstable, the shortcomings such as anti-interference difference.
Summary of the invention
For solving above-mentioned deficiency, the utility model provides a kind of low-voltage active electric power filter control system, and the real time dynamic tracing realizing electric current compensates, and reaches the nearly effect absorbing the harmonic and reactive currents that nonlinear load produces.
The utility model adopts following technical scheme: a kind of low-voltage active electric power filter control system, comprising: precharge plate module, transformer, offset current detection module, grid side current detection module, high frequency filtering module, capacitance voltage detection module, DRC module, low-voltage active electric power filter master control borad, main fuse, main contactor, flat ripple reactance, current-limiting reactor, dc-link capacitance, master control circuit breaker, Switching Power Supply; Precharge plate module realizes the precharge of circuit system, and the three-phase electricity of electrical network through the access of master control circuit breaker, then through main fuse, flat ripple reactance, current-limiting reactor, high frequency filtering module, is charged to the dc-link capacitance of powering for IGBT; Line voltage produces D.C. regulated power supply after transformer and Switching Power Supply, for low-voltage active electric power filter master control borad is powered; Electrical network access place is connected with grid side current detection module, for detecting in real time the current/voltage of grid side input circuit; Master control circuit breaker output is connected with offset current detection module, for detecting in real time the electric current of Active Power Filter-APF; Low-voltage active electric power filter master control borad carries out real time dynamic tracing sampling with conditioning, when bus direct voltage reaches 500V to DC bus-bar voltage, controls the relay adhesive of precharge plate module, by charging current limiter impedance short circuit; Low-voltage active electric power filter master control borad drives IGBT, DC bus pumping voltage is carried out to real time dynamic tracing sampling and conditioning simultaneously, when DC bus-bar voltage pump is raised to 700V, the relay controlling precharge plate module disconnects, the closing of contact of main contactor, electric current is directly charged to dc-link capacitance by the contact of main contactor, described low-voltage active electric power filter master control borad, comprising:
Core controls DSP module, carries out Data Detection, process and compensatory control to peripheral circuit;
Grid side input circuit sampling apparatus, for carrying out real time dynamic tracing sampling and conditioning to the current/voltage of grid side input circuit, and is sent to and enters described core and control to process in DSP module;
APF output loop sampling apparatus, for carrying out real time dynamic tracing sampling and conditioning to the electric current of Active Power Filter-APF, and is sent to and enters described core and control to carry out A/D process in DSP module;
DC bus pumping voltage sampling apparatus, carries out real time dynamic tracing sampling and conditioning to the DC bus pumping voltage of Active Power Filter-APF, and is sent to and enters described core and control to carry out A/D process in DSP module;
Drive unit, above-mentioned core controls the PWM compensating control signal of DSP module by drive unit, carries out drived control and generates offset current, after exporting Active Power Filter-APF to, injects electrical network, reaches the object of compensation;
First memory circuit, for storing the data handled by core control DSP module;
Preferably, described grid side input circuit sampling apparatus comprises:
Grid side input circuit sampling Hall element, for carrying out real time dynamic tracing sampling to the current/voltage of grid side input circuit;
The conditioning of the current signal of above-mentioned sampled grid side input circuit is analog voltage signal by the first signal conditioning circuit, enters described core and controls to carry out A/D process in DSP module;
Sync detection circuit, by synchronously detecting the ac voltage signal of grid side input circuit, and send into described core and control DSP module and process, the A/D producing the identical synchronous working pulse signal of line voltage frequency, phase place and electrical network first-harmonic frequency multiplication synchronously adopts enabling signal.
Preferably, described APF output loop sampling apparatus comprises:
APF output current sampling Hall element, for carrying out real time dynamic tracing sampling to the electric current of Active Power Filter-APF;
The conditioning of the current signal of above-mentioned sampled Active Power Filter-APF is analog voltage signal by secondary signal modulate circuit, enters described core and controls to carry out A/D process in DSP module.
Preferably, described DC bus pumping voltage sampling apparatus comprises:
DC bus pumping voltage sampling Hall element, carries out real time dynamic tracing and sampling to the DC bus pumping voltage of Active Power Filter-APF;
3rd signal conditioning circuit, samples above-mentioned DC bus pumping voltage and set point, and result is sent to core control DSP module; Core controls DSP module according to sampled value, controls the feedback to power grid energy.
The treatable analog voltage of DSP module is controlled in order to obtain core, described first signal conditioning circuit or secondary signal modulate circuit comprise sampling with high precision resistance and discharge circuit: sample rate current is by sampling with high precision resistance coating-forming voltage signal, discharge circuit carries out scale amplifying to voltage signal, obtain analog voltage, enter described core and control to carry out A/D process in DSP module.
In order to allow the PWM pulse width modulated signal conversion making core control DSP module export become offset current, being delivered to Active Power Filter-APF, injecting electrical network, reach the object of compensation, between PWM pulse-width signal and Active Power Filter-APF, be provided with drive unit.Described drive unit comprises:
Logic gates, be connected to described core and control DSP module pwm control signal interface, described pwm signal, after the logical process of logic gates, generates and described pwm control signal equal and opposite in direction, the switching signal that phase place is contrary;
First optical coupling isolation circuit, is connected to the delivery outlet of above-mentioned logic gates, isolates switching signal;
Drive IGBT module, above-mentioned switching signal drives IGBT module, generates offset current, is delivered to Active Power Filter-APF, injects electrical network, reaches the object of compensation.
In order to the normal operation of safeguards system, described IGBT module is connected with the second optical coupling isolation circuit, the fault-signal of described IGBT module feeds back to core by the second optical coupling isolation circuit and controls DSP module; Core controls DSP module according to fed back fault-signal, controls the operation of low-voltage active electric power filter control system.
For the ease of maintenance personal to the inquiry of system fault condition and maintenance, described core controls DSP module and is connected with LED indicating circuit, can light corresponding LED according to different malfunctions.
In order to realize the man-machine interaction of multi-stage menu interface management display mode, the CAN of described core control DSP module is connected with core control ARM7 module,
Preferably, described core control ARM7 model calling has serial port chip module and the second memory circuit;
Described core control ARM7 module carries out serial communication by the PAN liquid crystal control panel of serial port chip module and peripheral hardware;
Described second memory circuit, for storing core control ARM7 module data to be dealt with.
Compared to the prior art, the utility model tool has the following advantages: one, and by grid side input circuit voltage, electric current and Active Power Filter-APF output loop electric current, and DC bus pumping voltage carries out real time dynamic tracing and detection, the method for difference comparsion; By drive unit, carry out drived control and generate offset current, reach the harmonic wave effects that filtering nonlinear load produces; Its two, can also the reactive current that produces of filtering nonlinear load, control the feature of energy-feedback power grid in real time; Its three, the utility model is provided with the first optical coupling isolation circuit between logic gates and the IGBT module of peripheral hardware, is isolated by the signal of switching signal and IGBT module, improves the antijamming capability of system, avoids misoperation; Its four, the utility model is connected with the second optical coupling isolation circuit in IGBT module, and the fault-signal of IGBT module feeds back to core by the second optical coupling isolation circuit and controls DSP module, so can realize the intelligent protection of active power filter control system; Its five, the utility model is provided with LED indicating circuit, is convenient to inquiry and the maintenance of system fault condition; Its six, the utility model is provided with LCD screen display device, can realize multi-stage menu interface management display mode man-machine interaction.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of low-voltage active electric power filter control system;
Fig. 2 is the system architecture diagram of low-voltage active electric power filter master control borad.
Embodiment
Embodiment of the present utility model is described with reference to the accompanying drawings.
With reference to Fig. 1, described low-voltage active electric power filter control system, comprise: precharge plate module (PRC), transformer, offset current detection module (LEM1), grid side current detection module (LEM2), high frequency filtering module (LCR), capacitance voltage detection module (EC), DRC module (DRC), low-voltage active electric power filter master control borad, scram button module, main fuse, main contactor, flat ripple reactance, current-limiting reactor, dc-link capacitance, master control circuit breaker, Switching Power Supply, lightning protection device.Precharge plate module realizes the precharge of circuit system, and the three-phase electricity of electrical network through the access of master control circuit breaker, then through main fuse, flat ripple reactance, current-limiting reactor, high frequency filtering module, is charged to the dc-link capacitance of powering for IGBT; Line voltage produces D.C. regulated power supply after transformer and Switching Power Supply, for low-voltage active electric power filter master control borad is powered; Electrical network access place is connected with grid side current detection module, for detecting in real time the current/voltage of grid side input circuit; Master control circuit breaker output is connected with offset current detection module, for detecting in real time the electric current of Active Power Filter-APF; Low-voltage active electric power filter master control borad carries out real time dynamic tracing sampling with conditioning, when bus direct voltage reaches 500V to DC bus-bar voltage, controls the relay adhesive of precharge plate module, by charging current limiter impedance short circuit; Low-voltage active electric power filter master control borad drives IGBT, DC bus pumping voltage is carried out to real time dynamic tracing sampling and conditioning simultaneously, when DC bus-bar voltage pump is raised to 700V, the relay controlling precharge plate module disconnects, the closing of contact of main contactor, electric current is directly charged to dc-link capacitance by the contact of main contactor
With reference to Fig. 2, described low-voltage active electric power filter master control borad, comprising:
Core controls DSP module (1), carries out Data Detection, process and compensatory control to peripheral circuit, and in this preferred implementation method, core controls DSP module (1) and comprises one piece of TMS320F28335 chip, and this chip is general dsp chip;
Grid side input circuit sampling apparatus (2), for carrying out real time dynamic tracing sampling and conditioning to the current/voltage of grid side input circuit, and is sent to and enters described core and control to process in DSP module (1);
APF output loop sampling apparatus (3), for carrying out real time dynamic tracing sampling and conditioning to the electric current of Active Power Filter-APF, and is sent to and enters described core and control to carry out A/D process in DSP module (1);
DC bus pumping voltage sampling apparatus (4), carries out real time dynamic tracing sampling and conditioning to the DC bus pumping voltage of Active Power Filter-APF, and is sent to and enters described core and control to carry out A/D process in DSP module (1);
Drive unit (5), above-mentioned core controls the compensating control signal of DSP module (1) by drive unit (5), carry out drived control and generate offset current, after exporting Active Power Filter-APF to, inject electrical network, offset with the humorous reactive current that involves in electrical network, reach the object of compensation;
First memory circuit (6), for storing the data handled by core control DSP module (1);
In this preferred implementation method, adopt the classical control strategy of parallel connection type APF, above-mentioned core controls DSP module (1) according to the output current to grid side input circuit voltage, electric current and Active Power Filter-APF, real time dynamic tracing and detection is carried out, the method for difference comparsion process with DC bus pumping voltage; Calculate harmonic current components, reactive current component, control to export PWM pulse-width signal; Described pwm signal, by drive unit (5), carries out drived control and generates offset current, after exporting Active Power Filter-APF to, injects electrical network, offsets, reach the object of compensation with the humorous reactive current that involves in electrical network.
With reference to Fig. 2, in this preferred implementation method, grid side input circuit sampling apparatus (2) comprising:
Grid side input circuit sampling Hall element (21), for carrying out real time dynamic tracing sampling to the current/voltage of grid side input circuit;
The conditioning of the current signal of above-mentioned sampled grid side input circuit is analog voltage signal by the first signal conditioning circuit (22), enters described core and controls to carry out A/D process in DSP module (1);
Sync detection circuit (23), by synchronously detecting the ac voltage signal of grid side input circuit, and send into described core and control DSP module (1) and process, the A/D producing the identical synchronous working pulse signal of line voltage frequency, phase place and electrical network first-harmonic frequency multiplication synchronously adopts enabling signal.
With reference to Fig. 2, in this preferred implementation method, APF output loop sampling apparatus (3) comprising:
APF output current sampling Hall element (31), for carrying out real time dynamic tracing sampling to the electric current of Active Power Filter-APF;
The conditioning of the current signal of above-mentioned sampled Active Power Filter-APF is analog voltage signal by secondary signal modulate circuit (32), enters described core and controls to carry out A/D process in DSP module (1).
With reference to Fig. 2, in this preferred implementation method, DC bus pumping voltage sampling apparatus (4) comprising:
DC bus pumping voltage sampling Hall element (41), carries out real time dynamic tracing and sampling to the DC bus pumping voltage of Active Power Filter-APF;
3rd signal conditioning circuit (42), samples above-mentioned DC bus pumping voltage and set point, and result is sent to core control DSP module (1); Core controls DSP module (1) according to sampled value, controls the feedback to power grid energy.
With reference to Fig. 2, in this preferred implementation method, the treatable analog voltage of DSP module is controlled in order to obtain core, described first signal conditioning circuit (22) or secondary signal modulate circuit (32) comprise sampling with high precision resistance and discharge circuit: sample rate current is by sampling with high precision resistance coating-forming voltage signal, discharge circuit carries out scale amplifying to voltage signal, obtain 0 ~ 3.3V analog voltage, enter described core and control to carry out A/D process in DSP module (1).
With reference to Fig. 2, in this preferred implementation method, offset current is become in order to allow the PWM pulse width modulated signal conversion making core control DSP module export, be delivered to Active Power Filter-APF, inject electrical network, reach the object of compensation, between PWM pulse-width signal and Active Power Filter-APF, be provided with drive unit (5).Described drive unit (5) comprising:
Logic gates (51), be connected to the pwm control signal interface that described core controls DSP module (1), described pwm signal, after the logical process of logic gates (51), generates and described pwm control signal equal and opposite in direction, the switching signal that phase place is contrary;
First optical coupling isolation circuit (52), is connected to the delivery outlet of above-mentioned logic gates (51), isolates switching signal, improves the antijamming capability of system, avoids misoperation;
Drive IGBT module (53), above-mentioned switching signal drives IGBT module (53), generates offset current, is delivered to Active Power Filter-APF, injects electrical network, reaches the object of compensation.
With reference to Fig. 2, in this preferred implementation method, in order to the normal operation of safeguards system, described IGBT module (53) is connected with the second optical coupling isolation circuit (7), the fault-signal of described IGBT module (53) feeds back to core by the second optical coupling isolation circuit (7) and controls DSP module (1); Core controls DSP module (1) controls low-voltage active electric power filter control system operation according to fed back fault-signal.
With reference to Fig. 2, in this preferred implementation method, for the ease of maintenance personal to the inquiry of system fault condition and maintenance, described core controls DSP module (1) and is connected with LED indicating circuit (8), can light corresponding LED according to different malfunctions.
With reference to Fig. 2, in this preferred implementation method, in order to realize the man-machine interaction of multi-stage menu interface management display mode, the CAN of described core control DSP module (1) is connected with core control ARM7 module (91).
With reference to Fig. 2, preferably, described core control ARM7 module (91) is connected with serial port chip module (92) and the second memory circuit (93);
Described core control ARM7 module (91) carries out serial communication by serial port chip module (92) and the PAN liquid crystal control panel of peripheral hardware;
Described second memory circuit (93), for storing core control ARM7 module (91) data to be dealt with.
Control the process of DSP module (1) and core control ARM7 module (91) through core, liquid crystal screen displays can be found the logout corresponding to different faults state.
This specific embodiment, adopts the classical control strategy of parallel connection type APF.When low-voltage active electric power filter control system enters operating state, grid side input circuit sampling Hall element (21), respectively to current i s and the sampling of voltage U s real time dynamic tracing of grid side input circuit.Because the frequency of electrical network always fluctuates up and down at 50Hz, therefore for ensureing the accuracy that electrical network parameter calculates, the change of Tracking Frequency of Power Grids is needed in measuring process, revise the sampling period of A/D at any time, constant to ensure sampling rate, sampled voltage Us enters core through sync detection circuit (23) and controls DSP module (1) and process, and the A/D producing the synchronous working pulse signal identical with line voltage frequency, phase place and 254 times of electrical network fundamental frequencies synchronously adopts enabling signal; Phase capable AC input signal is transformed into square-wave signal, realize the phase-detection of three-phase mains voltage, utilize the saltus step of square-wave signal to trigger core and control DSP module (1) generation interruption, to calculate the A/D sampling period of mains frequency and control DSP.
With the above-mentioned sampling period for the cycle of operation, in each cycle of operation: the current i s of grid side input circuit is after current sampling Hall element real time dynamic tracing with sampling, by the sampling with high precision resistance coating-forming voltage signal of the first signal conditioning circuit (22), and discharge circuit carries out scale amplifying to voltage signal, obtain the analog voltage of 0 ~ 3V, enter core and control to carry out A/D process in DSP module (1); APF output current ic is after APF output current sampling Hall element (31) real time dynamic tracing with sampling, by the sampling with high precision resistance coating-forming voltage signal of secondary signal modulate circuit (32), and discharge circuit carries out scale amplifying to voltage signal, obtain the analog voltage of 0 ~ 3V, enter core and control to carry out A/D process in DSP module (1); The DC bus pumping voltage Uc of Active Power Filter-APF is after DC bus pumping voltage sampling Hall element (41) real time dynamic tracing with sampling, by the 3rd signal conditioning circuit (42), above-mentioned DC bus pumping voltage Uc and set point are compared, and comparative result is sent to core control DSP module (1).Core controls DSP module (1) by THE FAST TRACKING SYSTEM FOR input/output voltage, electric current, and the control algolithm of difference comparsion calculates harmonic current components, reactive current component, controls to export PWM; Described pwm signal is after the logical process of logic gates (51), enter the first optical coupling isolation circuit (52) and carry out signal isolation, final generation and described pwm signal equal and opposite in direction, the switching signal that phase place is contrary, described switching signal access IGBT module (53) is carried out drived control and is generated offset current, inject electrical network, offset with the humorous reactive current that involves in electrical network, reach the object of compensation.
Simultaneously, above-mentioned IGBT module (53) is connected with the second optical coupling isolation circuit (7), and the fault-signal of described IGBT module (53) controls DSP module (1) by the second optical coupling isolation circuit (7) Real-time Feedback to core; Core controls DSP module (1) controls low-voltage active electric power filter control system operation according to fed back fault-signal.
Described core controls DSP module (1) and is connected with LED indicating circuit (8), can light corresponding LED, be convenient to inquiry and the maintenance of system fault condition according to different malfunctions.
In addition, described core control ARM7 module (91) and core control DSP module (1) and carry out CAN communication; Core control ARM7 module (91) data to be dealt with are stored in the second memory circuit (93); The serial ports of core control ARM7 module (91) carries out serial communication by serial port chip module (92) and the PAN liquid crystal control panel of peripheral hardware, complete the real-time liquid crystal display of APF system balance information and monitoring, logout inquiry etc. corresponding to malfunction, realize the man-machine interaction of multi-stage menu interface management display mode.
Above-described embodiment is just explained in detail the technical solution of the utility model; the utility model has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; every improvement on the utility model basis according to above-mentioned principle and spirit, substitute, all should within protection range of the present utility model.
Claims (10)
1. a low-voltage active electric power filter control system, comprising: precharge plate module, transformer, offset current detection module, grid side current detection module, high frequency filtering module, capacitance voltage detection module, DRC module, low-voltage active electric power filter master control borad, main fuse, main contactor, flat ripple reactance, current-limiting reactor, dc-link capacitance, master control circuit breaker, Switching Power Supply; Precharge plate module realizes the precharge of circuit system, and the three-phase electricity of electrical network through the access of master control circuit breaker, then through main fuse, flat ripple reactance, current-limiting reactor, high frequency filtering module, is charged to the dc-link capacitance of powering for IGBT; Line voltage produces D.C. regulated power supply after transformer and Switching Power Supply, for low-voltage active electric power filter master control borad is powered; Electrical network access place is connected with grid side current detection module, for detecting in real time the current/voltage of grid side input circuit; Master control circuit breaker output is connected with offset current detection module, for detecting in real time the electric current of Active Power Filter-APF; Low-voltage active electric power filter master control borad carries out real time dynamic tracing sampling with conditioning, when bus direct voltage reaches 500V to DC bus-bar voltage, controls the relay adhesive of precharge plate module, by charging current limiter impedance short circuit; Low-voltage active electric power filter master control borad drives IGBT, DC bus pumping voltage is carried out to real time dynamic tracing sampling and conditioning simultaneously, when DC bus-bar voltage pump is raised to 700V, the relay controlling precharge plate module disconnects, the closing of contact of main contactor, electric current is directly charged to dc-link capacitance by the contact of main contactor, it is characterized in that, described low-voltage active electric power filter master control borad comprises:
Core controls DSP module (1), carries out Data Detection, process and compensatory control to peripheral circuit;
Grid side input circuit sampling apparatus (2), for carrying out real time dynamic tracing sampling and conditioning to the current/voltage of grid side input circuit, and is sent to described core and controls to process in DSP module (1);
APF output loop sampling apparatus (3), for carrying out real time dynamic tracing sampling and conditioning to the electric current of Active Power Filter-APF, and is sent to described core and controls to carry out A/D process in DSP module (1);
DC bus pumping voltage sampling apparatus (4), carries out real time dynamic tracing sampling and conditioning to the DC bus pumping voltage of Active Power Filter-APF, and is sent to described core and controls to carry out A/D process in DSP module (1);
Drive unit (5), above-mentioned core controls the compensating control signal of DSP module (1) by drive unit (5), carries out drived control and generates offset current, after exporting Active Power Filter-APF to, injects electrical network;
First memory circuit (6), for storing the data handled by core control DSP module (1).
2. low-voltage active electric power filter control system according to claim 1, is characterized in that: described grid side input circuit sampling apparatus (2) comprising:
Grid side input circuit sampling Hall element (21), for carrying out real time dynamic tracing sampling to the current/voltage of grid side input circuit;
The conditioning of the current signal of above-mentioned sampled grid side input circuit is analog voltage signal by the first signal conditioning circuit (22), enters described core and controls to carry out A/D process in DSP module (1);
Sync detection circuit (23), by synchronously detecting the ac voltage signal of grid side input circuit, and send into described core and control DSP module (1) and process, the A/D producing the identical synchronous working pulse signal of line voltage frequency, phase place and electrical network first-harmonic frequency multiplication synchronously adopts enabling signal.
3. low-voltage active electric power filter control system according to claim 2, is characterized in that: described APF output loop sampling apparatus (3) comprising:
APF output current sampling Hall element (31), for carrying out real time dynamic tracing sampling to the electric current of Active Power Filter-APF;
The conditioning of the current signal of above-mentioned sampled Active Power Filter-APF is analog voltage signal by secondary signal modulate circuit (32), enters described core and controls to carry out A/D process in DSP module (1).
4. low-voltage active electric power filter control system according to claim 1, is characterized in that: described DC bus pumping voltage sampling apparatus (4) comprising:
DC bus pumping voltage sampling Hall element (41), carries out real time dynamic tracing and sampling to the DC bus pumping voltage of Active Power Filter-APF;
3rd signal conditioning circuit (42), samples above-mentioned DC bus pumping voltage, and result is sent to core control DSP module (1); Core controls DSP module (1) and adopts Fu Li leaf function analysis in inside, calculates and controls the size to the feedback electricity of electrical network.
5. low-voltage active electric power filter control system according to claim 3, it is characterized in that: described first signal conditioning circuit (22) or secondary signal modulate circuit (32) comprise sampling with high precision resistance and discharge circuit: sample rate current is by sampling with high precision resistance coating-forming voltage signal, discharge circuit carries out scale amplifying to voltage signal, obtain analog voltage, enter described core and control to carry out A/D process in DSP module (1).
6. low-voltage active electric power filter control system according to claim 1, is characterized in that: described drive unit (5) comprising:
Logic gates (51), be connected to the pwm control signal interface that described core controls DSP module (1), described pwm signal, after the logical process of logic gates (51), generates and described pwm control signal equal and opposite in direction, the switching signal that phase place is contrary;
First optical coupling isolation circuit (52), is connected to the delivery outlet of above-mentioned logic gates (51), isolates switching signal;
Drive IGBT module (53), above-mentioned switching signal drives IGBT module (53), generates offset current, injects electrical network.
7. low-voltage active electric power filter control system according to claim 6, it is characterized in that: described IGBT module (53) is connected with the second optical coupling isolation circuit (7), the fault-signal of described IGBT module (53) feeds back to core by the second optical coupling isolation circuit (7) and controls DSP module (1); Core controls DSP module (1) controls low-voltage active electric power filter control system operation according to fed back fault-signal.
8. low-voltage active electric power filter control system according to claim 7, is characterized in that: described core controls DSP module (1) and is connected with LED indicating circuit (8), lights corresponding LED according to different malfunctions.
9. low-voltage active electric power filter control system according to claim 1, it is characterized in that: the CAN of described core control DSP module (1) is connected with core control ARM7 module (91), realize the man-machine interaction of multi-stage menu interface management display mode.
10. low-voltage active electric power filter control system according to claim 9, is characterized in that: described core control ARM7 module (91) is connected with serial port chip module (92) and the second memory circuit (93);
Described core control ARM7 module (91) carries out serial communication by serial port chip module (92) and the PAN liquid crystal control panel of peripheral hardware;
Described second memory circuit (93), for storing core control ARM7 module (91) data to be dealt with.
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| CN108470659A (en) * | 2018-02-27 | 2018-08-31 | 宁波央腾汽车电子有限公司 | A kind of novel electron relay |
| CN110165674A (en) * | 2019-05-15 | 2019-08-23 | 安徽亚辉电气自动化有限公司 | A kind of active filter safety management system |
| CN112436524A (en) * | 2020-11-12 | 2021-03-02 | 南京斯坦艾德电气有限公司 | Multiple harmonic amplitude limiting method |
| CN112436524B (en) * | 2020-11-12 | 2024-06-11 | 南京斯坦艾德电气有限公司 | Multi-harmonic amplitude limiting method |
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2015
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| CN108470659A (en) * | 2018-02-27 | 2018-08-31 | 宁波央腾汽车电子有限公司 | A kind of novel electron relay |
| CN110165674A (en) * | 2019-05-15 | 2019-08-23 | 安徽亚辉电气自动化有限公司 | A kind of active filter safety management system |
| CN110165674B (en) * | 2019-05-15 | 2023-01-10 | 安徽亚辉电气自动化有限公司 | Active filter safety management system |
| CN112436524A (en) * | 2020-11-12 | 2021-03-02 | 南京斯坦艾德电气有限公司 | Multiple harmonic amplitude limiting method |
| CN112436524B (en) * | 2020-11-12 | 2024-06-11 | 南京斯坦艾德电气有限公司 | Multi-harmonic amplitude limiting method |
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