CN219418046U - DC voltage-stabilizing control circuit of DC power distribution network - Google Patents
DC voltage-stabilizing control circuit of DC power distribution network Download PDFInfo
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- CN219418046U CN219418046U CN202320954934.3U CN202320954934U CN219418046U CN 219418046 U CN219418046 U CN 219418046U CN 202320954934 U CN202320954934 U CN 202320954934U CN 219418046 U CN219418046 U CN 219418046U
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The utility model discloses a direct-current power distribution network direct-current voltage-stabilizing control circuit, which relates to the field of power distribution networks and comprises the following components: a power supply module for supplying direct current; the sampling module is used for sampling direct current, providing sampling voltage for the feedback regulation module and providing working voltage for the voltage stabilization module; the voltage stabilizing module is used for outputting a stable voltage to the feedback regulating module; the feedback adjusting module is used for outputting PWM signals with different duty ratios according to the sampled voltage and adjusting the output voltage of the power supply module; the beneficial effects of the utility model are as follows: according to the utility model, PWM signals with different magnitudes are output by sampling current information on the DC power distribution network, so that the impedance of the DC power distribution network is regulated, voltage stabilizing control of the DC power distribution network is constructed, a switch control module is arranged, the duty ratio of the PWM signals is detected, and a power supply loop of the DC power distribution network is disconnected in time when the duty ratio exceeds a threshold value, so that the power consumption load is prevented from being damaged.
Description
Technical Field
The utility model relates to the field of power distribution networks, in particular to a direct-current power distribution network direct-current voltage-stabilizing control circuit.
Background
Compared with an alternating-current power distribution network, the direct-current power distribution network is provided with a direct-current bus, the direct-current load can be directly powered by the direct-current bus, the direct-current power distribution network has small line loss, high reliability, no need of phase frequency control and strong capacity of receiving a distributed power supply.
The existing direct current power supply network coordinates the working modes of all sub-modules by controlling the voltage variation of the direct current bus, and can keep power balance and voltage stability in the power distribution network under different conditions. The structure is complicated and needs to be improved.
Disclosure of Invention
The utility model aims to provide a direct-current power distribution network direct-current voltage stabilizing control circuit for solving the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a dc voltage regulation control circuit for a dc power distribution network, comprising:
a power supply module for supplying direct current;
the sampling module is used for sampling direct current, providing sampling voltage for the feedback regulation module and providing working voltage for the voltage stabilization module;
the voltage stabilizing module is used for outputting a stable voltage to the feedback regulating module;
the feedback adjusting module is used for outputting PWM signals with different duty ratios according to the sampled voltage and adjusting the output voltage of the power supply module;
the switch control module is used for detecting the duty ratio information of the PWM signals, and when the duty ratio is lower than a threshold value, the power supply loop of the power supply module is disconnected;
the power supply module is connected with the sampling module, the sampling module is connected with the voltage stabilizing module and the feedback regulating module, the voltage stabilizing module is connected with the switch control module and the feedback regulating module, the feedback regulating module is connected with the switch control module and the power supply module, and the switch control module is connected with the power supply module.
As still further aspects of the utility model: the sampling module comprises a current transformer X, a rectifier T, a capacitor C1, a capacitor C2, an inductor L1, a resistor R2 and a resistor R3, wherein one end of the current transformer X is connected with a first end of the rectifier T, the other end of the current transformer X is connected with a third end of the rectifier T, a second end of the rectifier T is grounded, a fourth end of the rectifier T is connected with one end of the capacitor C1 and one end of the inductor L1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is connected with one end of the capacitor C2, a voltage stabilizing module and one end of the resistor R2, the other end of the capacitor C2 is grounded, and the other end of the resistor R2 is connected with one end of the resistor R3 and a feedback regulating module, and the other end of the resistor R3 is grounded.
As still further aspects of the utility model: the voltage stabilizing module comprises a capacitor C6 and a voltage stabilizer U1, wherein the input end of the voltage stabilizer U1 is connected with the sampling module, one end of the capacitor C6 is grounded, the other end of the capacitor C6 is grounded, the grounding ground of the voltage stabilizer U1 is grounded, and the output end of the voltage stabilizer U1 is connected with the feedback regulating module.
As still further aspects of the utility model: the feedback regulation module comprises a timer U2, a resistor R4, a resistor R5, a potentiometer RP1, a diode D2, a capacitor C3 and a capacitor C4, wherein the model of the timer U2 is 555, a pin No. 4 and a pin No. 5 of the timer U2 are connected with the voltage stabilizing module, a pin No. 7 of the timer U2 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the cathode of the diode D1, the anode of the diode D1 is connected with the cathode of the diode D2, a pin No. 2 of the timer U2, one end of the capacitor C3 is grounded, the anode of the diode D2 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with one end of the potentiometer RP1, the other end of the potentiometer RP1 is connected with the sampling module, a pin No. 5 of the timer U2 is grounded through the capacitor C4, a pin No. 1 of the timer U2 is grounded, and a pin No. 3 of the timer U2 is connected with the switch control module and the power supply module.
As still further aspects of the utility model: the switch control module comprises a resistor R6, a potentiometer RP2, a capacitor C5, a triode V1, a relay J1 and a diode D3, wherein one end of the resistor R6 is connected with the feedback regulation module, the other end of the resistor R6 is connected with one end of the potentiometer RP2, the other end of the potentiometer RP2 is connected with one end of the capacitor C5 and a base electrode of the triode V1, the other end of the capacitor C5 is grounded, an emitter electrode of the triode V1 is grounded, a collector electrode of the triode V1 is connected with one end of the relay J1 and an anode electrode of the diode D3, and the other end of the relay J1 is connected with a cathode electrode of the diode D3 and the voltage stabilizing module.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the current information on the direct-current power distribution network is sampled to output PWM signals with different magnitudes, so that the impedance of the direct-current power distribution network is adjusted, and the voltage stabilizing control of the direct-current power distribution network is constructed, so that the circuit structure is simple, and the practicability is strong; and a switch control module is arranged to detect the duty ratio of the PWM signal, and when the duty ratio exceeds a threshold value, the power supply loop of the direct-current power distribution network is disconnected in time, so that the damage to the power load is avoided.
Drawings
Fig. 1 is a schematic diagram of a dc voltage regulation control circuit for a dc power distribution network.
Fig. 2 is a circuit diagram of a dc voltage stabilizing control circuit of a dc power distribution network.
Fig. 3 is a circuit diagram of the switch control module.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.
Referring to fig. 1, a dc voltage stabilizing control circuit for a dc power distribution network includes:
a power supply module for supplying direct current;
the sampling module is used for sampling direct current, providing sampling voltage for the feedback regulation module and providing working voltage for the voltage stabilization module;
the voltage stabilizing module is used for outputting a stable voltage to the feedback regulating module;
the feedback adjusting module is used for outputting PWM signals with different duty ratios according to the sampled voltage and adjusting the output voltage of the power supply module;
the switch control module is used for detecting the duty ratio information of the PWM signals, and when the duty ratio is lower than a threshold value, the power supply loop of the power supply module is disconnected;
the power supply module is connected with the sampling module, the sampling module is connected with the voltage stabilizing module and the feedback regulating module, the voltage stabilizing module is connected with the switch control module and the feedback regulating module, the feedback regulating module is connected with the switch control module and the power supply module, and the switch control module is connected with the power supply module.
In particular embodiments: referring to fig. 2, a dc power distribution network in the power supply module is output through a switch S1 after passing through a parallel circuit formed by a resistor R1 and a MOS transistor V2.
In this embodiment: referring to fig. 2, the sampling module includes a current transformer X, a rectifier T, a capacitor C1, a capacitor C2, an inductor L1, a resistor R2, and a resistor R3, wherein one end of the current transformer X is connected to a first end of the rectifier T, the other end of the current transformer X is connected to a third end of the rectifier T, a second end of the rectifier T is grounded, a fourth end of the rectifier T is connected to one end of the capacitor C1 and one end of the inductor L1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is connected to one end of the capacitor C2, a voltage stabilizing module, one end of the resistor R2, the other end of the capacitor C2 is grounded, the other end of the resistor R2 is connected to one end of the resistor R3, and the other end of the resistor R3 is grounded.
The circuit transformer X collects current information of the direct current power distribution network, stable direct current is output after passing through a filter circuit formed by a rectifier T, a capacitor C1, a capacitor C2 and an inductor L1, stable voltage is output after the direct current is supplied to a voltage stabilizing module, the direct current is the sum of the voltages of a resistor R2 and a resistor R3, the resistor R3 is a sampling resistor, the upper voltage is sampling voltage, the voltage information of the current direct current power supply network is fed back, and the voltage information is output to a feedback regulating module.
In this embodiment: referring to fig. 2, the voltage stabilizing module includes a capacitor C6 and a voltage stabilizer U1, wherein an input end of the voltage stabilizer U1 is connected to the sampling module, one end of the capacitor C6, the other end of the capacitor C6 is grounded, the ground of the voltage stabilizer U1 is grounded, and an output end of the voltage stabilizer U1 is connected to the feedback adjustment module.
The voltage stabilizing module outputs stable 5V direct current to supply power for the feedback regulating module and the switch control module.
In this embodiment: referring to fig. 2, the feedback adjustment module includes a timer U2, a resistor R4, a resistor R5, a potentiometer RP1, a diode D2, a capacitor C3, and a capacitor C4, where the model of the timer U2 is 555, pins No. 4 and No. 5 of the timer U2 are connected to the voltage stabilizing module, pin No. 7 of the timer U2 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the negative electrode of the diode D1, the positive electrode of the diode D1 is connected to the negative electrode of the diode D2, pin No. 2 of the timer U2, pin No. 6 of the timer U2, one end of the capacitor C3, the other end of the capacitor C3 is grounded, one end of the positive electrode of the diode D2 is connected to the resistor R4, the other end of the resistor R4 is connected to one end of the potentiometer RP1, the other end of the potentiometer RP1 is connected to the sampling module, pin No. 5 of the timer U2 is grounded through the capacitor C4, pin No. 1 of the timer U2 is grounded, and pin No. 3 of the timer U2 is connected to the switch control module and the power supply module.
The sampling voltage charges a capacitor C3 through a potentiometer RP1, a resistor R4 and a diode D2, the capacitor C3 discharges through the diode D1, the resistor R5 and a pin 7 of a timer, and when at least one of pins 2 and 6 (voltage on the capacitor C3) of the 555 timer is at a low level, the pin 3 outputs a high level; therefore, the capacitor C3 is repeatedly charged and discharged, the No. 3 pin of the timer U2 outputs PWM signals, and different duty ratio PWM signals are output according to different sampling voltages. The larger the voltage of the direct-current power distribution network is, the larger the sampling voltage is, the faster the charging speed of the capacitor C3 is, the shorter the low level time of the capacitor C3 is, the larger the duty ratio of PWM signals is, the larger the impedance of a parallel circuit formed by the resistor R1 and the MOS tube V2 is, and the output voltage of the direct-current power distribution network is reduced; likewise, the smaller the output voltage of the direct-current power distribution network is, the smaller the sampling voltage is, the lower the duty ratio of the final PWM signal is, and the output voltage of the direct-current power distribution network is increased. Thus, the voltage stabilizing control is constructed.
In this embodiment: referring to fig. 3, the switch control module includes a resistor R6, a potentiometer RP2, a capacitor C5, a triode V1, a relay J1, and a diode D3, wherein one end of the resistor R6 is connected to the feedback adjustment module, the other end of the resistor R6 is connected to one end of the potentiometer RP2, the other end of the potentiometer RP2 is connected to one end of the capacitor C5, a base electrode of the triode V1, the other end of the capacitor C5 is grounded, an emitter electrode of the triode V1 is grounded, a collector electrode of the triode V1 is connected to one end of the relay J1, an anode of the diode D3, and the other end of the relay J1 is connected to a cathode of the diode D3 and the voltage stabilizing module.
When the voltage is too small, the power supply faults are indicated, the duty ratio of the PWM signal is too small, the voltage in unit time is larger, the capacitor C5 exceeds the larger voltage, the trigger triode V1 is conducted, the relay J1 is powered on, the control switch S1 is disconnected, and power supply for a subsequent circuit is stopped.
The working principle of the utility model is as follows: the power supply module supplies direct current; the sampling module samples direct current, provides sampling voltage for the feedback regulation module, and provides working voltage for the voltage stabilization module; the voltage stabilizing module outputs a stabilized voltage and supplies the stabilized voltage to the feedback regulating module; the feedback regulation module outputs PWM signals with different duty ratios according to the sampled voltage, and regulates the output voltage of the power supply module; the switch control module detects the duty ratio information of the PWM signal, and when the duty ratio is lower than a threshold value, the power supply loop of the power supply module is disconnected.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (5)
1. A direct current power distribution network direct current voltage stabilizing control circuit is characterized in that:
the direct-current power distribution network direct-current voltage stabilizing control circuit comprises:
a power supply module for supplying direct current;
the sampling module is used for sampling direct current, providing sampling voltage for the feedback regulation module and providing working voltage for the voltage stabilization module;
the voltage stabilizing module is used for outputting a stable voltage to the feedback regulating module;
the feedback adjusting module is used for outputting PWM signals with different duty ratios according to the sampled voltage and adjusting the output voltage of the power supply module;
the switch control module is used for detecting the duty ratio information of the PWM signals, and when the duty ratio is lower than a threshold value, the power supply loop of the power supply module is disconnected;
the power supply module is connected with the sampling module, the sampling module is connected with the voltage stabilizing module and the feedback regulating module, the voltage stabilizing module is connected with the switch control module and the feedback regulating module, the feedback regulating module is connected with the switch control module and the power supply module, and the switch control module is connected with the power supply module.
2. The direct current power distribution network direct current voltage stabilizing control circuit according to claim 1, wherein the sampling module comprises a current transformer X, a rectifier T, a capacitor C1, a capacitor C2, an inductor L1, a resistor R2 and a resistor R3, one end of the current transformer X is connected with a first end of the rectifier T, the other end of the current transformer X is connected with a third end of the rectifier T, a second end of the rectifier T is grounded, a fourth end of the rectifier T is connected with one end of the capacitor C1 and one end of the inductor L1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is connected with one end of the capacitor C2, one end of the voltage stabilizing module and one end of the resistor R2, the other end of the capacitor C2 is grounded, the other end of the resistor R2 is connected with one end of the resistor R3 and the feedback regulating module, and the other end of the resistor R3 is grounded.
3. The direct current power distribution network direct current voltage stabilizing control circuit according to claim 1, wherein the voltage stabilizing module comprises a capacitor C6 and a voltage stabilizer U1, an input end of the voltage stabilizer U1 is connected with the sampling module and one end of the capacitor C6, the other end of the capacitor C6 is grounded, the ground of the voltage stabilizer U1 is grounded, and an output end of the voltage stabilizer U1 is connected with the feedback adjusting module.
4. The direct current power distribution network direct current voltage stabilizing control circuit according to claim 2, wherein the feedback regulating module comprises a timer U2, a resistor R4, a resistor R5, a potentiometer RP1, a diode D2, a capacitor C3 and a capacitor C4, the timer U2 is 555, a pin 4 and a pin 5 of the timer U2 are connected with the voltage stabilizing module, a pin 7 of the timer U2 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the negative electrode of the diode D1, the positive electrode of the diode D1 is connected with the negative electrode of the diode D2, a pin 2 of the timer U2, a pin 6 of the capacitor C3, the other end of the capacitor C3 is grounded, the positive electrode of the diode D2 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with one end of the potentiometer RP1, the other end of the potentiometer RP1 is connected with the sampling module, a pin 5 of the timer U2 is grounded through the capacitor C4, a pin 1 of the timer U2 is grounded, and a pin 3 is connected with the power supply module.
5. The direct current power distribution network direct current voltage stabilizing control circuit according to claim 1, wherein the switch control module comprises a resistor R6, a potentiometer RP2, a capacitor C5, a triode V1, a relay J1 and a diode D3, one end of the resistor R6 is connected with the feedback adjustment module, the other end of the resistor R6 is connected with one end of the potentiometer RP2, the other end of the potentiometer RP2 is connected with one end of the capacitor C5, a base electrode of the triode V1, the other end of the capacitor C5 is grounded, an emitter electrode of the triode V1 is grounded, a collector electrode of the triode V1 is connected with one end of the relay J1 and an anode electrode of the diode D3, and the other end of the relay J1 is connected with a cathode electrode of the diode D3 and the voltage stabilizing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320954934.3U CN219418046U (en) | 2023-04-25 | 2023-04-25 | DC voltage-stabilizing control circuit of DC power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320954934.3U CN219418046U (en) | 2023-04-25 | 2023-04-25 | DC voltage-stabilizing control circuit of DC power distribution network |
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| Publication Number | Publication Date |
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| CN219418046U true CN219418046U (en) | 2023-07-25 |
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| CN202320954934.3U Active CN219418046U (en) | 2023-04-25 | 2023-04-25 | DC voltage-stabilizing control circuit of DC power distribution network |
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| CN (1) | CN219418046U (en) |
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- 2023-04-25 CN CN202320954934.3U patent/CN219418046U/en active Active
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