CN220492645U - Reactive static compensation device for high-voltage SVG - Google Patents
Reactive static compensation device for high-voltage SVG Download PDFInfo
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- CN220492645U CN220492645U CN202322129772.2U CN202322129772U CN220492645U CN 220492645 U CN220492645 U CN 220492645U CN 202322129772 U CN202322129772 U CN 202322129772U CN 220492645 U CN220492645 U CN 220492645U
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- 230000003068 static effect Effects 0.000 title claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims description 19
- 230000000087 stabilizing effect Effects 0.000 claims description 19
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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Abstract
The utility model discloses a high-voltage SVG reactive power static compensation device, which relates to the reactive power compensation field, and comprises: the power grid module is used for supplying alternating current and outputting the alternating current to the load module; the load module is used for loading the power supply work; the current sampling module is used for sampling the power supply current of the power grid module for the load module, converting the power supply current into a voltage signal, supplying power for the relay working module and providing sampling signals for the reactive power regulation module and the overvoltage driving module; the reactive power regulation module is used for changing the load connected to the power grid module along with the current change to absorb or release reactive power; the overvoltage driving module is used for driving the overvoltage driving module to work; the beneficial effects of the utility model are as follows: the utility model is provided with the overvoltage driving module and the relay working module, and when the current of the circuit suddenly increases, the reactive power regulation module is prevented from being difficult to react quickly, and the resistance value of the reactive power regulation module connected to a power grid is directly reduced to quickly discharge the current.
Description
Technical Field
The utility model relates to the field of reactive power compensation, in particular to a high-voltage SVG reactive power static compensation device.
Background
The reactive compensation SVG adopts a power electronic device (IGBT) capable of being turned off to form a self-commutation bridge circuit, and is connected to a power grid in parallel through a reactor to properly adjust the amplitude and the phase of output voltage. The current on the alternating current side can quickly absorb or release the required reactive power, thereby achieving the purpose of quickly and dynamically adjusting the reactive power.
The existing reactive power compensation is often single-ended regulation, so that when the current on the alternating current side suddenly changes and needs to be discharged quickly, the current is often not timely enough and needs to be improved.
Disclosure of Invention
The utility model aims to provide a high-voltage SVG reactive static compensation device so as 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 high voltage SVG reactive static compensation device comprising:
the power grid module is used for supplying alternating current and outputting the alternating current to the load module;
the load module is used for loading the power supply work;
the current sampling module is used for sampling the power supply current of the power grid module for the load module, converting the power supply current into a voltage signal, supplying power for the relay working module and providing sampling signals for the reactive power regulation module and the overvoltage driving module;
the reactive power regulation module is used for changing the load connected to the power grid module along with the current change to absorb or release reactive power;
the overvoltage driving module is used for driving the overvoltage driving module to work when the sampling signal suddenly increases to a threshold value;
the relay working module is used for reducing the load of the reactive power regulation module when in driving work;
the power grid module is connected with the load module, the current sampling module and the reactive power regulation module, the current sampling module is connected with the reactive power regulation module, the overvoltage driving module and the relay working module, the overvoltage driving module is connected with the relay working module, and the relay working module is connected with the reactive power regulation module.
As still further aspects of the utility model: the current sampling module comprises a transformer X, a diode D1, a capacitor C1, a potentiometer RP1, a resistor R1, a capacitor C2, a resistor R6 and a diode D4, wherein one end of the transformer X is connected with the anode of the diode D1, the other end of the transformer X is grounded, the cathode of the diode D1 is connected with one end of the capacitor C1, one end of the potentiometer RP1 and one end of the resistor R6, the other end of the capacitor C1 is grounded, the other end of the potentiometer RP1 is connected with one end of the resistor R1, the reactive power regulation module, the overvoltage driving module and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the resistor R1 is grounded, the other end of the resistor R6 is connected with the cathode of the diode D4 and the relay working module, and the anode of the diode D4 is grounded.
As still further aspects of the utility model: the reactive power regulation module comprises a controllable precise voltage stabilizing source Z1, an MOS tube V1, a resistor R2, a resistor R3 and a switch S1, wherein the model of the controllable precise voltage stabilizing source Z1 is TL431, a reference electrode of the controllable precise voltage stabilizing source Z1 is connected with a current sampling module, the positive electrode of the controllable precise voltage stabilizing source Z1 is grounded, the negative electrode of the controllable precise voltage stabilizing source Z1 is connected with the G electrode of the MOS tube V1, the D electrode of the MOS tube V1 is grounded, the S electrode of the MOS tube V1 is connected with one end of the resistor R2, one end of the resistor R3 and one end of the switch S1, the other end of the resistor R2 is grounded, and the other end of the resistor R3 is connected with the other end of the switch S1 and the power grid module.
As still further aspects of the utility model: the overvoltage driving module comprises a diode D2, a resistor R4 and a resistor R5, wherein the negative electrode of the diode D2 is connected with the current sampling module, 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 resistor R5 and the relay working module, and the other end of the resistor R5 is grounded.
As still further aspects of the utility model: the relay working module comprises a relay J1, a diode D3 and a triode V2, wherein one end of the relay J1 is connected with the cathode of the diode D3 and the current sampling module, the other end of the relay J1 is connected with the anode of the diode D3 and the collector of the triode V2, the emitter of the triode V2 is grounded, and the base of the triode V2 is connected with the overvoltage driving module.
Compared with the prior art, the utility model has the beneficial effects that: the utility model is provided with the overvoltage driving module and the relay working module, and when the current of the circuit suddenly increases, the reactive power regulation module is prevented from being difficult to react quickly, and the resistance value of the reactive power regulation module connected to a power grid is directly reduced to quickly discharge the current.
Drawings
Fig. 1 is a schematic diagram of a high voltage SVG reactive static compensator.
Fig. 2 is a circuit diagram of a high voltage SVG reactive static compensator.
Fig. 3 is an internal schematic view of TL 431.
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 high-voltage SVG reactive static compensation device includes:
the power grid module is used for supplying alternating current and outputting the alternating current to the load module;
the load module is used for loading the power supply work;
the current sampling module is used for sampling the power supply current of the power grid module for the load module, converting the power supply current into a voltage signal, supplying power for the relay working module and providing sampling signals for the reactive power regulation module and the overvoltage driving module;
the reactive power regulation module is used for changing the load connected to the power grid module along with the current change to absorb or release reactive power;
the overvoltage driving module is used for driving the overvoltage driving module to work when the sampling signal suddenly increases to a threshold value;
the relay working module is used for reducing the load of the reactive power regulation module when in driving work;
the power grid module is connected with the load module, the current sampling module and the reactive power regulation module, the current sampling module is connected with the reactive power regulation module, the overvoltage driving module and the relay working module, the overvoltage driving module is connected with the relay working module, and the relay working module is connected with the reactive power regulation module.
In this embodiment: referring to fig. 2, the current sampling module includes a transformer X, a diode D1, a capacitor C1, a potentiometer RP1, a resistor R1, a capacitor C2, a resistor R6, and a diode D4, wherein one end of the transformer X is connected to the anode of the diode D1, the other end of the transformer X is grounded, the cathode of the diode D1 is connected to one end of the capacitor C1, one end of the potentiometer RP1, one end of the resistor R6, the other end of the capacitor C1 is grounded, the other end of the potentiometer RP1 is connected to one end of the resistor R1, the reactive power regulation module, the overvoltage driving module, one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the resistor R1 is grounded, the other end of the resistor R6 is connected to the cathode of the diode D4, the relay working module, and the anode of the diode D4 is grounded.
The transformer X obtains alternating current information, the alternating current information is changed into direct current through a diode D1 and a capacitor C1, the size of the alternating current reflects the current output to a load module by a power grid module, the alternating current is converted into a voltage signal through a potentiometer RP1 and a resistor R1, the voltage signal is the sampling voltage, the sampling voltage is output to a reactive power regulation module and an overvoltage driving module, and meanwhile, a voltage stabilizing diode is arranged on the basis of a diode D4, and stable voltage is provided for a relay working module.
In this embodiment: referring to fig. 2 and 3, the reactive power regulation module includes a controllable precise voltage stabilizing source Z1, a MOS tube V1, a resistor R2, a resistor R3, and a switch S1, where the controllable precise voltage stabilizing source Z1 is TL431, a reference electrode of the controllable precise voltage stabilizing source Z1 is connected to the current sampling module, a positive electrode of the controllable precise voltage stabilizing source Z1 is grounded, a negative electrode of the controllable precise voltage stabilizing source Z1 is connected to a G electrode of the MOS tube V1, a D electrode of the MOS tube V1 is grounded, an S electrode of the MOS tube V1 is connected to one end of the resistor R2, one end of the resistor R3, one end of the switch S1, another end of the resistor R2 is grounded, and another end of the resistor R3 is connected to another end of the switch S1, and a power grid module.
When the current on the power grid power supply line is larger, the resistance value of the resistor R1 is larger, so that the reference electrode voltage of the controllable precise voltage stabilizing source Z1 is larger, the negative electrode voltage of the controllable precise voltage stabilizing source Z1 is smaller, the conduction degree of the MOS tube V1 (PMOS) is increased, and the current leakage is increased; the principle is the same, and when the current on the power grid power supply line is smaller, the final MOS tube V1 conduction degree is reduced, and the current leakage is reduced. The specific function of TL431 may be illustrated by the functional modules of fig. 3. Here, the negative voltage and the reference voltage are inversely proportional within a certain voltage range.
In this embodiment: referring to fig. 2, the overvoltage driving module includes a diode D2, a resistor R4, and a resistor R5, wherein a cathode of the diode D2 is connected to the current sampling module, an anode of the diode D2 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to one end of the resistor R5, and the other end of the resistor R5 is grounded.
When the current on the power grid power supply line is particularly high, the voltage stabilizing diode D2 is broken down, and then the relay working module is driven to work.
In this embodiment: referring to fig. 2, the relay working module includes a relay J1, a diode D3, and a triode V2, wherein one end of the relay J1 is connected with the cathode of the diode D3 and the current sampling module, the other end of the relay J1 is connected with the anode of the diode D3 and the collector of the triode V2, the emitter of the triode V2 is grounded, and the base of the triode V2 is connected with the overvoltage driving module.
The voltage is input to the base electrode of the triode V2, the triode V2 is conducted, the relay J1 is powered on to work, the control switch S1 is closed, the impedance of the reactive power regulation module is instantaneously pulled down, and therefore current is rapidly discharged.
The working principle of the utility model is as follows: the power grid module is used for supplying alternating current and outputting the alternating current to the load module; the load module is used for loading the power supply; the current sampling module is used for sampling the power supply current of the power grid module for the load module, converting the power supply current into a voltage signal, supplying power for the relay working module, and providing sampling signals for the reactive power regulation module and the overvoltage driving module; the reactive power regulation module is used for changing the load connected to the power grid module along with the current change to absorb or release reactive power; the overvoltage driving module is used for driving the overvoltage driving module to work when the sampling signal is suddenly increased to a threshold value; and the relay working module is used for reducing the load of the reactive power regulation module when in driving work.
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 high-voltage SVG reactive static compensation device is characterized in that:
the high-voltage SVG reactive static compensation device comprises:
the power grid module is used for supplying alternating current and outputting the alternating current to the load module;
the load module is used for loading the power supply work;
the current sampling module is used for sampling the power supply current of the power grid module for the load module, converting the power supply current into a voltage signal, supplying power for the relay working module and providing sampling signals for the reactive power regulation module and the overvoltage driving module;
the reactive power regulation module is used for changing the load connected to the power grid module along with the current change to absorb or release reactive power;
the overvoltage driving module is used for driving the overvoltage driving module to work when the sampling signal suddenly increases to a threshold value;
the relay working module is used for reducing the load of the reactive power regulation module when in driving work;
the power grid module is connected with the load module, the current sampling module and the reactive power regulation module, the current sampling module is connected with the reactive power regulation module, the overvoltage driving module and the relay working module, the overvoltage driving module is connected with the relay working module, and the relay working module is connected with the reactive power regulation module.
2. The high-voltage SVG reactive static compensation device according to claim 1, wherein the current sampling module comprises a transformer X, a diode D1, a capacitor C1, a potentiometer RP1, a resistor R1, a capacitor C2, a resistor R6 and a diode D4, one end of the transformer X is connected with the positive electrode of the diode D1, the other end of the transformer X is grounded, the negative electrode of the diode D1 is connected with one end of the capacitor C1, one end of the potentiometer RP1 and one end of the resistor R6, the other end of the capacitor C1 is grounded, the other end of the potentiometer RP1 is connected with one end of the resistor R1, the reactive power regulation module, the overvoltage driving module and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the resistor R1 is grounded, the other end of the resistor R6 is connected with the negative electrode of the diode D4 and the relay working module, and the positive electrode of the diode D4 is grounded.
3. The reactive power static compensation device of claim 1, wherein the reactive power regulation module comprises a controllable precise voltage stabilizing source Z1, a MOS tube V1, a resistor R2, a resistor R3 and a switch S1, wherein the controllable precise voltage stabilizing source Z1 is TL431, a reference electrode of the controllable precise voltage stabilizing source Z1 is connected with the current sampling module, a positive electrode of the controllable precise voltage stabilizing source Z1 is grounded, a negative electrode of the controllable precise voltage stabilizing source Z1 is connected with a G electrode of the MOS tube V1, a D electrode of the MOS tube V1 is grounded, an S electrode of the MOS tube V1 is connected with one end of a resistor R2, one end of the resistor R3 and one end of the switch S1, the other end of the resistor R2 is grounded, and the other end of the resistor R3 is connected with the other end of the switch S1 and the power grid module.
4. The high-voltage SVG reactive static compensation device according to claim 1, wherein the overvoltage driving module comprises a diode D2, a resistor R4 and a resistor R5, wherein the negative electrode of the diode D2 is connected with the current sampling module, 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 resistor R5 and the relay working module, and the other end of the resistor R5 is grounded.
5. The reactive static compensator of claim 4, wherein the relay working module comprises a relay J1, a diode D3 and a triode V2, one end of the relay J1 is connected with the cathode of the diode D3 and the current sampling module, the other end of the relay J1 is connected with the anode of the diode D3 and the collector of the triode V2, the emitter of the triode V2 is grounded, and the base of the triode V2 is connected with the overvoltage driving module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322129772.2U CN220492645U (en) | 2023-08-09 | 2023-08-09 | Reactive static compensation device for high-voltage SVG |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322129772.2U CN220492645U (en) | 2023-08-09 | 2023-08-09 | Reactive static compensation device for high-voltage SVG |
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| Publication Number | Publication Date |
|---|---|
| CN220492645U true CN220492645U (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322129772.2U Active CN220492645U (en) | 2023-08-09 | 2023-08-09 | Reactive static compensation device for high-voltage SVG |
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| CN (1) | CN220492645U (en) |
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- 2023-08-09 CN CN202322129772.2U patent/CN220492645U/en active Active
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