CN219801899U - Voltage coordination voltage stabilizing control circuit of direct-current power distribution network - Google Patents
Voltage coordination voltage stabilizing control circuit of direct-current power distribution network Download PDFInfo
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- CN219801899U CN219801899U CN202321080108.7U CN202321080108U CN219801899U CN 219801899 U CN219801899 U CN 219801899U CN 202321080108 U CN202321080108 U CN 202321080108U CN 219801899 U CN219801899 U CN 219801899U
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- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 52
- 230000005856 abnormality Effects 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 230000006641 stabilisation Effects 0.000 claims abstract description 11
- 238000011105 stabilization Methods 0.000 claims abstract description 11
- 230000006855 networking Effects 0.000 claims description 24
- 239000003990 capacitor Substances 0.000 claims description 23
- 238000010248 power generation Methods 0.000 claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 238000004146 energy storage Methods 0.000 claims description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a voltage coordination voltage stabilization control circuit of a direct-current power distribution network, which relates to the field of direct-current power distribution networks, and comprises the following components: the direct-current power distribution network unit is used for supplying voltage to the direct-current power distribution network; the sampling unit is used for sampling voltage information of the direct-current power distribution network, obtaining sampling voltage and outputting the sampling voltage to the PWM unit and the abnormality detection unit; the PWM unit is used for outputting different PWM signals according to different sampling voltages and adjusting the output voltage of the direct-current power distribution network unit; compared with the prior art, the utility model has the beneficial effects that: the utility model carries out real-time regulation by detecting the voltage on the direct current power distribution network, so that the direct current power distribution network is subjected to voltage stabilizing control, the voltage on the direct current power distribution network is more approximate to ideal voltage, an abnormality detection unit is additionally arranged, and a power supply loop is timely disconnected when the voltage on the direct current power distribution network is overlarge.
Description
Technical Field
The utility model relates to the field of direct-current power distribution networks, in particular to a voltage coordination and voltage stabilization control circuit of a direct-current power distribution network.
Background
The direct-current distribution network generally comprises elements such as a wind power generation module, a photovoltaic power generation module, an electric energy storage module, a load, a networking converter and the like, and is a multi-source multi-node system. In a direct current power distribution network, direct current voltage is an important index for reflecting the stability of the system, and the direct current voltage is stable, so that the power balance of the network can be ensured, and the stable operation of the system is maintained.
The existing voltage stabilizing adjustment of the direct-current power distribution network causes deviation between the actual output voltage and the ideal voltage due to power distribution network loss, so that a feedback circuit is required to be arranged for adjustment treatment.
Disclosure of Invention
The utility model aims to provide a voltage coordination and voltage stabilization control circuit of a direct-current power distribution network, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a direct current distribution network voltage coordination voltage stabilization control circuit, comprising:
the direct-current power distribution network unit is used for supplying voltage to the direct-current power distribution network;
the sampling unit is used for sampling voltage information of the direct-current power distribution network, obtaining sampling voltage and outputting the sampling voltage to the PWM unit and the abnormality detection unit;
the PWM unit is used for outputting different PWM signals according to different sampling voltages and adjusting the output voltage of the direct-current power distribution network unit;
the abnormality detection unit is used for detecting whether the sampling voltage exceeds a threshold value or not, and when the sampling voltage exceeds the threshold value, the power supply loop of the direct-current power distribution network unit is disconnected;
the direct current distribution network unit is connected with the sampling unit, and the sampling unit is connected with the PWM unit and the abnormality detection unit.
As still further aspects of the utility model: the direct current distribution network unit comprises a wind power generation module, a solar power generation module, an electric energy storage module, a networking converter, a load, an MOS tube V1, an MOS tube V2 and a switch S1, wherein the wind power generation module is connected with the D pole of the MOS tube V1, the S pole of the MOS tube V1 is connected with the networking converter, the solar power generation module is connected with the D pole of the MOS tube V2, the S pole of the MOS tube V2 is connected with the networking converter, the G pole of the MOS tube V1 is connected with the PWM unit, the G pole of the MOS tube V2 is connected with the PWM unit, the electric energy storage module is connected with the networking converter, the networking converter is connected with one end of the switch S1, and the other end of the switch S1 is connected with the load.
As still further aspects of the utility model: the sampling unit comprises a voltage transformer Y, a diode D1, a capacitor C1 and a resistor R1, wherein one end of the voltage transformer Y is grounded, the other end of the voltage transformer Y is connected with the anode of the diode D1, the cathode of the diode D1 is connected with one end of the capacitor C1 and one end of the resistor R1, the other end of the capacitor C1 is grounded, and the other end of the resistor R1 is connected with the PWM unit and the abnormality detection unit.
As still further aspects of the utility model: the PWM unit comprises an inverter U1, an inverter U2, an inverter U3, a diode D4, a diode D5, a resistor R3, a resistor R4, a potentiometer RP1, a potentiometer RP2 and a capacitor C2, wherein the power end of the inverter U1 is connected with the sampling unit, the input end of the inverter U1 is connected with one end of the capacitor C2, the cathode of the diode D4 and the anode of the diode D5, the output end of the inverter U1 is connected with one end of the resistor R3, one end of the resistor R4 and the input end of the inverter U2, the other end of the resistor R3 is connected with one end of the potentiometer RP1, the other end of the potentiometer RP1 is connected with the anode of the diode D4, the other end of the resistor R4 is connected with one end of the potentiometer RP2, the other end of the potentiometer RP2 is connected with the cathode of the diode D5, the output end of the inverter U2 is connected with the input end of the inverter U3 and the other end of the capacitor C2, the output end of the inverter U3 is connected with the DC power distribution network unit, and the power end of the inverter U2 is connected with the power end of the inverter U3 and the power supply voltage VCC.
As still further aspects of the utility model: the abnormality detection unit comprises a resistor R2, a diode D2, a silicon controlled rectifier Z1, a relay J1 and a diode D3, wherein one end of the resistor R2 is connected with the sampling unit, the other end of the resistor R2 is connected with the cathode of the diode D2, the anode of the diode D2 is connected with the control electrode of the silicon controlled rectifier Z1, the cathode of the silicon controlled rectifier Z1 is grounded, the anode of the silicon controlled rectifier Z1 is connected with one end of the relay J1 and the anode of the diode D3, and the other end of the relay J1 is connected with the cathode of the diode D3 and the power supply voltage VCC.
Compared with the prior art, the utility model has the beneficial effects that: the utility model carries out real-time regulation by detecting the voltage on the direct current power distribution network, so that the direct current power distribution network is subjected to voltage stabilizing control, the voltage on the direct current power distribution network is more approximate to ideal voltage, an abnormality detection unit is additionally arranged, and a power supply loop is timely disconnected when the voltage on the direct current power distribution network is overlarge.
Drawings
Fig. 1 is a schematic diagram of a voltage coordination and voltage stabilization control circuit of a direct current power distribution network.
Fig. 2 is a circuit diagram of a dc distribution network unit.
Fig. 3 is a circuit diagram of a voltage coordination and voltage stabilization control circuit of a direct current power distribution network.
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 voltage coordination and voltage stabilization control circuit for a dc power distribution network includes:
the direct-current power distribution network unit is used for supplying voltage to the direct-current power distribution network;
the sampling unit is used for sampling voltage information of the direct-current power distribution network, obtaining sampling voltage and outputting the sampling voltage to the PWM unit and the abnormality detection unit;
the PWM unit is used for outputting different PWM signals according to different sampling voltages and adjusting the output voltage of the direct-current power distribution network unit;
the abnormality detection unit is used for detecting whether the sampling voltage exceeds a threshold value or not, and when the sampling voltage exceeds the threshold value, the power supply loop of the direct-current power distribution network unit is disconnected;
the direct current distribution network unit is connected with the sampling unit, and the sampling unit is connected with the PWM unit and the abnormality detection unit.
In this embodiment: referring to fig. 2, the dc power distribution network unit includes a wind power generation module, a solar power generation module, an electric energy storage module, a networking converter, a load, a MOS tube V1, a MOS tube V2, and a switch S1, wherein the wind power generation module is connected with the D pole of the MOS tube V1, the S pole of the MOS tube V1 is connected with the networking converter, the solar power generation module is connected with the D pole of the MOS tube V2, the S pole of the MOS tube V2 is connected with the networking converter, the G pole of the MOS tube V1 is connected with the PWM unit, the G pole of the MOS tube V2 is connected with the PWM unit, the electric energy storage module is connected with the networking converter, the networking converter is connected with one end of the switch S1, and the other end of the switch S1 is connected with the load.
The wind power generation module and the solar power generation module generate power to supply power to the networking converter, the electric energy storage module charges and stores electric energy through the networking converter, and the networking converter supplies power to the load through the switch S1 after the current transformation is finished.
In this embodiment: referring to fig. 3, the sampling unit includes a voltage transformer Y, a diode D1, a capacitor C1, and a resistor R1, wherein one end of the voltage transformer Y is grounded, the other end of the voltage transformer Y is connected to the anode of the diode D1, the cathode of the diode D1 is connected to one end of the capacitor C1 and one end of the resistor R1, the other end of the capacitor C1 is grounded, and the other end of the resistor R1 is connected to the PWM unit and the abnormality detection unit.
The voltage transformer Y collects voltage information output to a load by the networking converter, obtains sampling voltage through a diode D1, a capacitor C1 and a resistor R1, and outputs the sampling voltage to a later-stage circuit.
In this embodiment: referring to fig. 3, the pwm unit includes an inverter U1, an inverter U2, an inverter U3, a diode D4, a diode D5, a resistor R3, a resistor R4, a potentiometer RP1, a potentiometer RP2, and a capacitor C2, wherein a power supply end of the inverter U1 is connected to the sampling unit, an input end of the inverter U1 is connected to one end of the capacitor C2, a cathode of the diode D4, an anode of the diode D5, an output end of the inverter U1 is connected to one end of the resistor R3, one end of the resistor R4, an input end of the inverter U2, another end of the resistor R3 is connected to one end of the potentiometer RP1, another end of the potentiometer RP1 is connected to an anode of the diode D4, another end of the resistor R4 is connected to one end of the potentiometer RP2, another end of the potentiometer RP2 is connected to a cathode of the diode D5, an output end of the inverter U2 is connected to an input end of the inverter U3, another end of the capacitor C2, an output end of the inverter U3 is connected to the power distribution network unit, and a power supply end of the inverter U2 is connected to a power supply end of the inverter U3.
Initially, there is no voltage on the capacitor C2, the input end of the inverter U1 is at a low level, the inverter U1 outputs a high level (the magnitude of the high level depends on the voltage of the power supply end, i.e. the sampling voltage), the capacitor C2 is charged through the resistor R3, the potentiometer RP1 and the diode D4, when the capacitor C2 is charged to a high level, the inverter U1 outputs a low level, and the capacitor C2 is discharged through the diode D5, the potentiometer RP2 and the resistor R4; in this way, a PWM signal is formed at the output end of the inverter U1, and the required PWM signals are output through the inverter U2 and the inverter U3 to control the conduction state of the MOS transistor V1 and the MOS transistor V2. The inverter U1 selects the sampling voltage to supply power, so that the duty ratio of the PWM signal output by the inverter U1 is related to the sampling voltage; the inverters U2 and U3 select a power supply voltage VCC (stable voltage) to ensure that the amplitude of the output PWM signal is stable. The output PWM signals change the voltage output to the networking converter by the wind power generation module and the solar power generation module by controlling the conduction conditions of the MOS transistors V1 and V2, so that the voltage output to a load by the networking converter is stabilized.
In this embodiment: referring to fig. 3, the abnormality detection unit includes a resistor R2, a diode D2, a thyristor Z1, a relay J1, and a diode D3, wherein one end of the resistor R2 is connected to the sampling unit, the other end of the resistor R2 is connected to the cathode of the diode D2, the anode of the diode D2 is connected to the control electrode of the thyristor Z1, the cathode of the thyristor Z1 is grounded, the anode of the thyristor Z1 is connected to one end of the relay J1 and the anode of the diode D3, and the other end of the relay J1 is connected to the cathode of the diode D3 and the power supply voltage VCC.
When the output voltage of the networking converter is overlarge due to circuit abnormality, namely the voltage stabilizing diode D2 is conducted, the controlled silicon Z1 is controlled to be conducted, the relay J1 is powered on to work, the switch S1 is disconnected, and a working loop between the networking converter and a load is disconnected.
The working principle of the utility model is as follows: the direct-current power distribution network unit is used for supplying voltage to a direct-current power distribution network; the sampling unit samples voltage information of the direct-current power distribution network, acquires sampling voltage and outputs the sampling voltage to the PWM unit and the abnormality detection unit; the PWM unit outputs different PWM signals according to different sampling voltages, and adjusts the output voltage of the direct-current power distribution network unit; and the abnormality detection unit detects whether the sampling voltage exceeds a threshold value, and when the sampling voltage exceeds the threshold value, the power supply loop of the direct-current power distribution network unit 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 distribution network voltage coordination voltage stabilizing control circuit is characterized in that:
the direct-current power distribution network voltage coordination voltage stabilization control circuit comprises:
the direct-current power distribution network unit is used for supplying voltage to the direct-current power distribution network;
the sampling unit is used for sampling voltage information of the direct-current power distribution network, obtaining sampling voltage and outputting the sampling voltage to the PWM unit and the abnormality detection unit;
the PWM unit is used for outputting different PWM signals according to different sampling voltages and adjusting the output voltage of the direct-current power distribution network unit;
the abnormality detection unit is used for detecting whether the sampling voltage exceeds a threshold value or not, and when the sampling voltage exceeds the threshold value, the power supply loop of the direct-current power distribution network unit is disconnected;
the direct current distribution network unit is connected with the sampling unit, and the sampling unit is connected with the PWM unit and the abnormality detection unit.
2. The direct-current power distribution network voltage coordination voltage stabilization control circuit according to claim 1, wherein the direct-current power distribution network unit comprises a wind power generation module, a solar power generation module, an electric energy storage module, a networking converter, a load, a MOS tube V1, a MOS tube V2 and a switch S1, wherein the wind power generation module is connected with the D pole of the MOS tube V1, the S pole of the MOS tube V1 is connected with the networking converter, the solar power generation module is connected with the D pole of the MOS tube V2, the S pole of the MOS tube V2 is connected with the networking converter, the G pole of the MOS tube V1 is connected with the PWM unit, the electric energy storage module is connected with the networking converter, the networking converter is connected with one end of the switch S1, and the other end of the switch S1 is connected with the load.
3. The direct-current power distribution network voltage coordination voltage stabilization control circuit according to claim 1, wherein the sampling unit comprises a voltage transformer Y, a diode D1, a capacitor C1 and a resistor R1, one end of the voltage transformer Y is grounded, the other end of the voltage transformer Y is connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with one end of the capacitor C1 and one end of the resistor R1, the other end of the capacitor C1 is grounded, and the other end of the resistor R1 is connected with the PWM unit and the abnormality detection unit.
4. The voltage coordination voltage stabilizing control circuit of direct current distribution network according to claim 2, wherein the PWM unit comprises an inverter U1, an inverter U2, an inverter U3, a diode D4, a diode D5, a resistor R3, a resistor R4, a potentiometer RP1, a potentiometer RP2, and a capacitor C2, the power supply terminal of the inverter U1 is connected to the sampling unit, the input terminal of the inverter U1 is connected to one terminal of the capacitor C2, the negative electrode of the diode D4, the positive electrode of the diode D5, the output terminal of the inverter U1 is connected to one terminal of the resistor R3, one terminal of the resistor R4, the input terminal of the inverter U2, the other terminal of the resistor R3 is connected to one terminal of the potentiometer RP1, the other terminal of the potentiometer RP1 is connected to the positive electrode of the diode D4, the other terminal of the resistor R4 is connected to one terminal of the potentiometer RP2, the other terminal of the potentiometer RP2 is connected to the negative electrode of the diode D5, the output terminal of the inverter U2 is connected to the input terminal of the inverter U3, the other terminal of the capacitor C2, the output terminal of the inverter U3 is connected to one terminal of the direct current distribution network unit, and the power supply terminal of the inverter U2 is connected to the power supply terminal of the inverter U3.
5. The voltage coordination voltage stabilization control circuit of a direct current distribution network according to claim 1, wherein the abnormality detection unit comprises a resistor R2, a diode D2, a silicon controlled rectifier Z1, a relay J1 and a diode D3, one end of the resistor R2 is connected with the sampling unit, the other end of the resistor R2 is connected with the cathode of the diode D2, the anode of the diode D2 is connected with the control electrode of the silicon controlled rectifier Z1, the cathode of the silicon controlled rectifier Z1 is grounded, the anode of the silicon controlled rectifier Z1 is connected with one end of the relay J1 and the anode of the diode D3, and the other end of the relay J1 is connected with the cathode of the diode D3 and the power supply voltage VCC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321080108.7U CN219801899U (en) | 2023-05-08 | 2023-05-08 | Voltage coordination voltage stabilizing control circuit of direct-current power distribution network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321080108.7U CN219801899U (en) | 2023-05-08 | 2023-05-08 | Voltage coordination voltage stabilizing control circuit of direct-current power distribution network |
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| CN219801899U true CN219801899U (en) | 2023-10-03 |
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| CN202321080108.7U Active CN219801899U (en) | 2023-05-08 | 2023-05-08 | Voltage coordination voltage stabilizing control circuit of direct-current power distribution network |
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| CN (1) | CN219801899U (en) |
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- 2023-05-08 CN CN202321080108.7U patent/CN219801899U/en active Active
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