CN208285237U - A kind of automatic voltage regulating device with power factor controlling - Google Patents
A kind of automatic voltage regulating device with power factor controlling Download PDFInfo
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- CN208285237U CN208285237U CN201821058219.7U CN201821058219U CN208285237U CN 208285237 U CN208285237 U CN 208285237U CN 201821058219 U CN201821058219 U CN 201821058219U CN 208285237 U CN208285237 U CN 208285237U
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- voltage
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- power factor
- phase difference
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Abstract
The utility model discloses a kind of automatic voltage regulating device with power factor controlling, belongs to electrical engineering technical field.The utility model solves existing power factor and calculates process complexity, and requires height for processing chip, and cost is larger, it is difficult to the problem of meeting real-time control.The utility model includes voltage signal extraction module, current transformer, power-factor angle computing module and signal processing module, the output end of voltage signal extraction module and current transformer is electrically connected with the input terminal of power-factor angle computing module respectively, the input terminal of power-factor angle computing module output end connection signal processing module.The utility model will be integrated in original voltage self-adjustment module automatic voltage adjusting with the module that power factor calculates, and pass through the purpose that control generator power factor improves unit output capacity.
Description
Technical field
The automatic voltage regulating device with power factor controlling that the utility model relates to a kind of, belongs to electrical engineering technology
Field.
Background technique
AVR device (automatic voltage regulator) is almost the indispensable a part of diesel-driven generator, it passes through detection hair
The voltage of motor output end automatically adjusts the exciting current of generator excitation winding, to maintain the stabilization of generator output voltage,
Prevent the damage of electronic equipment.
In diesel-driven generator application process, when there are a large amount of reactive load and power electronic devices in electrical equipment
When, reactive power can be consumed, the efficiency that certainly will will lead to generator reduces.In order to improve generator efficiency, need to calculate and control
Make its power factor.
Traditional AVR device can control the output voltage of generator, but not have the function of power factor controlling.It is existing
Power factor to calculate process complicated, and processing chip is required high, cost is larger, it is difficult to meet the requirement of real-time control.
Therefore it provides a kind of AVR device with power factor controlling, efficiently solves existing power factor meter
Calculation process is complicated, and requires height for processing chip, and cost is larger, it is difficult to the problem of meeting real-time control, it has also become this field
Technical staff's important technological problems urgently to be resolved.
Utility model content
The utility model provides a kind of automatic voltage regulating device that cost is relatively low and has power factor controlling, with solution
The problem of being mentioned in certainly above-mentioned background technique.
The technical solution of the utility model includes:
A kind of automatic voltage regulating device with power factor controlling, including voltage signal extraction module, Current Mutual Inductance
The output end of device, power-factor angle computing module and signal processing module, voltage signal extraction module and current transformer is distinguished
It is electrically connected with the input terminal of power-factor angle computing module, power-factor angle computing module output end connection signal processing module
Input terminal.
It is preferred: the output end of the voltage signal extraction module of the device and the input terminal of current transformer and generating set
It is electrically connected, the output end of the signal processing module of the device is electrically connected by executing agency and static reactive generator.
It is preferred: the power-factor angle computing module include voltage zero-crossing detection circuit, current over-zero detection circuit,
Phase difference calculating circuit and phase difference decision circuitry, the voltage zero-crossing detection circuit and current over-zero detection circuit respectively at
The input terminal of phase difference calculating circuit connects, and the output end of phase difference calculating circuit connects phase difference decision circuitry.
Preferred: the voltage zero-crossing detection circuit includes the resistor voltage divider circuit connecting with voltage signal extraction module
And voltage comparator circuit, the current over-zero detection circuit include the I/V that the sampling resistor connecting with current transformer is constituted
Conversion circuit and voltage comparator circuit, the phase difference calculating circuit is made of rest-set flip-flop, the phase difference judgement
Circuit is made of 2 555 timers.
Preferred: the signal processing module is constituted by comparator, same or door, trigger and with door, phase difference calculating
Circuit and 2 555 timers output pulse width pass through comparator, trigger respectively, using with door, as executing agency
Starting, stop signal.
Preferred: the executing agency is mainly made of contactor, adjusted by the signal of signal processing module to
Contactor coil is powered on and is not powered on to contactor coil, then controls the investment and excision of static reactive generator.
The technical solution of the utility model is achieved in that provided by the utility model a kind of with power factor controlling
Automatic voltage regulating device include at voltage signal extraction module, current transformer, power-factor angle computing module and signal
The output end of reason module, voltage signal extraction module and current transformer is electric with the input terminal of power-factor angle computing module respectively
Property connection, the input terminal of power-factor angle computing module output end connection signal processing module, the voltage signal of the device extracts
The output end of the input terminal and generating set of module and current transformer is electrically connected, the output of the signal processing module of the device
End is electrically connected by executing agency and static reactive generator, for being equipped with the diesel-driven generator of automatic voltage regulating device,
The voltage signal extraction module that voltage detecting is adjusted using the original automatic voltage of diesel-driven generator, acquires the output voltage of generator
Signal, acquisition voltage signal and current transformer acquisition current signal by power-factor angle computing module carry out power because
The calculating at number angle, then decide whether to start or stop executing agency by signal processing module, and then determine static reacance hair
The investment and excision of raw device.
The utility model has the following beneficial effects: the utility model relates to it is a kind of with the automatic of power factor controlling
Voltage regulating device can effectively control generator power factor, improve generating set output power, compensate for traditional AVR
Device not can control the defect of generator power factor；It is extracted using the voltage signal of the original AVR voltage detecting of diesel-driven generator
Module acquires output voltage signal, will be integrated in original voltage self-adjustment module AVR with the module that power factor calculates
It is interior, save cost；And propose a kind of control strategy for not needing control chip, pure analog detection phase difference pulsewidth, to control
The investment and excision of static reactive generator improve the output power of generator, reach to control diesel-driven generator power factor
To control algolithm complexity is reduced, the speed of static reactive generator investment and the purpose of computational accuracy are improved, is solved simultaneously
Because of the problem that the error of approximate algorithm generation is larger.
Detailed description of the invention
Fig. 1 is the automatic voltage regulating device structural schematic diagram with power factor controlling；
Fig. 2 is the automatic voltage regulating device power-factor angle computing module circuit diagram with power factor controlling；
Fig. 3 is the automatic voltage regulating device signal processing module circuit diagram with power factor controlling；
Specific embodiment
Illustrate present embodiment in conjunction with Fig. 1 to Fig. 3, as depicted in figs. 1 and 2, one kind of present embodiment have power because
Number control automatic voltage regulating devices include voltage signal extraction module, current transformer, power-factor angle computing module and
The output end of signal processing module, voltage signal extraction module and current transformer is defeated with power-factor angle computing module respectively
Enter end to be electrically connected, the input terminal of power-factor angle computing module output end connection signal processing module.Power-factor angle calculates
Module includes voltage zero-crossing detection circuit, current over-zero detection circuit, phase difference calculating circuit and phase difference decision circuitry, voltage
Input terminal of the zero cross detection circuit with current over-zero detection circuit respectively at phase difference calculating circuit connects, phase difference calculating circuit
Output end connect phase difference decision circuitry, voltage zero-crossing detection circuit includes that the resistance that connect with voltage signal extraction module divides
Volt circuit and voltage comparator circuit, as shown in Fig. 2, resistor voltage divider circuit includes resistance R8, resistance R9 and grounding leg GND1, electricity
Resistance one end R8 is connect with measure voltage &, and the other end of resistance R8 is connect with one end of resistance R1 and resistance R9 respectively,
The other end of resistance R9 is connected with grounding leg GND1；Voltage comparator circuit include resistance R1, resistance R1, resistance R3, diode D1,
The other end of triode Q1 and amplifier LM393, resistance R1 are connect with the anode of integrated circuit LM393, and amplifier LM393 points
It is not connected with the end VCC1 and the end VEE, amplifier LM393 is connect with the input terminal of resistance R3, the input terminal and triode of resistance R3
The base stage of Q1 connects, and the other end of resistance R3 is connected with the collector of triode Q1, the emitter and diode D1 of triode Q1
Anode be connected, the cathode of diode D1 is connected with amplifier LM393, one end company of the cathode of amplifier LM393 and resistance R2
It connects, the other end of resistance R6 is connected with grounding leg GND；Current over-zero detection circuit includes the sampling electricity connecting with current transformer
The I/V conversion circuit and voltage comparator circuit constituted is hindered, conversion circuit includes resistance R4, and one end of resistance R4 and voltage and current are examined
Module connection is surveyed, the other end of resistance R4 is connect with one end of resistance R5；Voltage comparator circuit includes resistance R5, resistance R6, electricity
Resistance R7, triode Q2, diode D4 and the other end of amplifier LM393, resistance R5 and the anode of integrated circuit LM393 are connect,
Amplifier LM393 is connected with the end VCC1 and the end VEE respectively, and amplifier LM393 is connect with the input terminal of resistance R7, resistance R7's
Input terminal is connect with the base stage of triode Q2, and the other end of resistance R7 is connected with the collector of triode Q2, the hair of triode Q2
Emitter-base bandgap grading is connected with the anode of diode D4, and the cathode of diode D4 is connected with amplifier LM393, the cathode of integrated circuit LM393
It is connect with one end of resistance R6, the other end of resistance R6 is connected with grounding leg GND.Phase difference calculating circuit is by rest-set flip-flop structure
At phase difference decision circuitry is made of 2 555 timers.The voltage signal extraction module and current transformer of the device
Input terminal and the output end of generating set be electrically connected, the output end of the signal processing module of the device by executing agency with
Static reactive generator is electrically connected.Signal processing module is constituted by comparator, same or door, trigger and with door, phasometer
Calculate circuit and 2 555 timers output pulse width pass through comparator, trigger respectively, using with door, as execute machine
The starting of structure, stop signal.
As shown in Figures 2 and 3, in phase difference calculating circuit, when the input of voltage leading current, phase difference calculating circuit is defeated
Out as phase difference width pulse；When the input of electric current leading voltage, phase difference calculating circuit output fixed width 10ms
Pulse.Enabling signal of the pulse as 555 timers, 2 555 timers export the pulse of 2 width after starting simultaneously:
One is phase difference corresponding with threshold power factor with wide pulse, another be detect electric current whether the 10ms of leading voltage
Pulse.The fixed pulse of 2 555 timers output is compared with the phase difference detected respectively, when the pulsewidth detected
When between the fixed pulse width of 2 555 timers output, voltage leading current and power factor are less than critical value at this time, and 2
2 rest-set flip-flops output of 555 timers is high level, by the enabling signal with composition executing agency behind the door；Work as detection
To pulsewidth be less than the power factor setting value corresponding time and then need not compensate for idle, the RS touching of 555 timer at this time
Send out device output low level latching and door；When the pulsewidth detected is 10ms, electric current leading voltage, another 555 timing at this time
The rest-set flip-flop output low level of device is lockked and door.Start executing agency when so exporting high level with door, when exporting low level
Stop executing agency.This judgment mode is not needed using any control chip, is detected, judgement, is executed by analog circuit completely,
The error that approximate computational calculation power factor generates inside single-chip microcontroller is reduced, while saving the time, effectively improves reactive compensation
Response speed improves the output power of diesel generating set, realizes effective control to generator power factor.
This embodiment is just an exemplary description of this patent, does not limit its protection scope, those skilled in the art
Member can also be changed its part, as long as it does not exceed the essence of this patent, within the protection scope of the present patent.
Claims (6)
1. a kind of automatic voltage regulating device with power factor controlling, it is characterised in that: including voltage signal extraction module,
Current transformer, power-factor angle computing module and signal processing module, voltage signal extraction module and current transformer it is defeated
Outlet is electrically connected with the input terminal of power-factor angle computing module respectively, power-factor angle computing module output end connection signal
The input terminal of processing module.
2. a kind of automatic voltage regulating device with power factor controlling according to claim 1, it is characterised in that: should
The output end of the voltage signal extraction module of device and the input terminal of current transformer and generating set is electrically connected, the device
The output end of signal processing module is electrically connected by executing agency and static reactive generator.
3. a kind of automatic voltage regulating device with power factor controlling according to claim 1, it is characterised in that: institute
The power-factor angle computing module stated include voltage zero-crossing detection circuit, current over-zero detection circuit, phase difference calculating circuit and
Phase difference decision circuitry, the voltage zero-crossing detection circuit and current over-zero detection circuit are respectively at phase difference calculating circuit
The output end of input terminal connection, phase difference calculating circuit connects phase difference decision circuitry.
4. a kind of automatic voltage regulating device with power factor controlling according to claim 3, it is characterised in that: institute
The voltage zero-crossing detection circuit stated includes the resistor voltage divider circuit and voltage comparator circuit connecting with voltage signal extraction module, institute
The current over-zero detection circuit stated includes compared with the I/V conversion circuit and voltage that the sampling resistor of current transformer connection is constituted
Circuit, the phase difference calculating circuit is made of rest-set flip-flop, and the phase difference decision circuitry is by 2 555 timings
What device was constituted.
5. a kind of automatic voltage regulating device with power factor controlling according to claim 4, it is characterised in that: institute
The signal processing module stated is constituted by comparator, same or door, trigger and with door, phase difference calculating circuit and 2 555 timers
The pulse width of output passes through comparator, trigger respectively, using with door, starting, stop signal as executing agency.
6. a kind of automatic voltage regulating device with power factor controlling according to claim 2, it is characterised in that: institute
The executing agency stated is mainly made of contactor, is adjusted by the signal of signal processing module and is powered on and not to contactor coil
It is powered on to contactor coil, then controls the investment and excision of static reactive generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821058219.7U CN208285237U (en) | 2018-07-04 | 2018-07-04 | A kind of automatic voltage regulating device with power factor controlling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821058219.7U CN208285237U (en) | 2018-07-04 | 2018-07-04 | A kind of automatic voltage regulating device with power factor controlling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208285237U true CN208285237U (en) | 2018-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821058219.7U Expired - Fee Related CN208285237U (en) | 2018-07-04 | 2018-07-04 | A kind of automatic voltage regulating device with power factor controlling |
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| CN (1) | CN208285237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752655A (en) * | 2019-03-05 | 2019-05-14 | 华自科技股份有限公司 | Field regulator trigger pulse detection method, device, detector and test fixture |
-
2018
- 2018-07-04 CN CN201821058219.7U patent/CN208285237U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752655A (en) * | 2019-03-05 | 2019-05-14 | 华自科技股份有限公司 | Field regulator trigger pulse detection method, device, detector and test fixture |
| CN109752655B (en) * | 2019-03-05 | 2021-05-04 | 华自科技股份有限公司 | Excitation regulator trigger pulse detection method and device, detector and test tool |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181225 Termination date: 20190704 |