CN209948676U - Voltage regulating circuit and three-phase power supply circuit thereof - Google Patents
Voltage regulating circuit and three-phase power supply circuit thereof Download PDFInfo
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- CN209948676U CN209948676U CN201921229053.5U CN201921229053U CN209948676U CN 209948676 U CN209948676 U CN 209948676U CN 201921229053 U CN201921229053 U CN 201921229053U CN 209948676 U CN209948676 U CN 209948676U
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model discloses a voltage regulation circuit and three-phase electricity supply circuit thereof, voltage regulation circuit are provided with input, output and zero line end, and the output is connected through main contactor and circuit breaker respectively to the input, is provided with main winding between output and the circuit breaker, the input is still in proper order through assisting contactor and adjustable winding connection zero line end. And each phase loop of the three-phase power supply circuit is provided with a voltage regulating circuit. Adopt the utility model discloses a voltage regulating circuit and three-phase electricity supply circuit thereof through adjusting the combinatorial relation between each switch, can guarantee distribution network output voltage's quality. Because the composite switch mode is adopted, the thyristor is only conducted in the transition process, so the heating value is small, the loss is low, the response speed is high, the use in severe environment is adapted, the requirement of rural power grids can be particularly met, and the quality problem of the rural power grid voltage can be effectively solved.
Description
Technical Field
The utility model relates to a circuit arrangement field for adjusting the voltage in the alternating current network through changing a characteristic of network load especially relates to a voltage regulating circuit and three-phase electricity supply circuit thereof.
Background
Due to the dispersibility of rural residents and the intermittence of agricultural life, the voltage of a rural power distribution network faces various problems, such as large power supply radius, low voltage, or low voltage under heavy load, and high voltage under light load operation, which has great influence on rural safe power utilization. Now, with the requirement of low carbon emission, the change of rural coal into electricity is important. If the voltage is unqualified, negative effects are generated on the voltage, and therefore, the treatment of the rural voltage quality is urgent.
SUMMERY OF THE UTILITY MODEL
For solving above technical problem, the utility model provides a voltage regulating circuit and three-phase electricity supply circuit thereof makes the output voltage deviation of rural distribution network can satisfy the national standard requirement, ensures the safety and stability operation of distribution network.
The technical scheme is as follows:
the first aspect provides a voltage regulating circuit, is provided with input, output and zero line end, and the output is connected through main contactor and circuit breaker respectively to the input, is provided with main winding between output and the circuit breaker, the input still connects the zero line end through supplementary contactor and adjustable winding in proper order.
With reference to the first aspect, in a first implementation manner of the first aspect, the adjustable winding is provided with a voltage-boosting winding module and a voltage-reducing winding module, one end of each of the voltage-boosting winding module and the voltage-reducing winding module is connected with the auxiliary contactor, and the other end of each of the voltage-boosting winding module and the voltage-reducing winding module is connected with the zero line end through control switches with the same structure.
With reference to the first implementable manner of the first aspect, in a second implementable manner of the first aspect, the control switch is a composite switch formed by combining an anti-parallel thyristor group and a contactor.
In combination with the first implementable manner of the first aspect, in a third implementable manner of the first aspect, the step-down winding module is provided with at least 1 step-down winding, all the step-down windings are sequentially connected in series between the auxiliary contactor and the control switch, and the common ends of the adjacent 2 step-down windings are respectively connected with the zero line end through the fling-cut switches with the same structure.
With reference to the third implementable manner of the first aspect, in a fourth implementable manner of the first aspect, the fling-cut switch is provided with an anti-parallel thyristor group and a contactor, and the anti-parallel thyristor group and the contactor are combined to form a composite switch and are connected in series between the common end and the zero line end of the 2 step-down windings.
In combination with any one of the first, second, and third realizable manners of the first aspect, in a fifth realizable manner of the first aspect, the step-up winding module is provided with at least 1 step-up winding, all the step-up windings are sequentially connected in series between the auxiliary contactor and the control switch, and the common ends of the adjacent 2 step-up windings are respectively connected with the zero line end through switching devices with the same structure.
With reference to the fifth implementation manner of the first aspect, in a sixth implementation manner of the first aspect, the switching device is provided with an anti-parallel thyristor group and a contactor, and the anti-parallel thyristor group and the contactor form a composite switch and are connected in series between a common end and a zero line end of the 2 boosting windings.
In a second aspect, a three-phase power supply circuit is provided, and each phase loop of three-phase power is provided with the voltage regulating circuit.
Has the advantages that: adopt the utility model discloses a voltage regulating circuit and three-phase electricity supply circuit thereof through adjusting the combinatorial relation between each switch, can guarantee distribution network output voltage's quality. Because the composite switch mode is adopted, the thyristor is only conducted in the transition process, so the heating value is small, the loss is low, the response speed is high, the use in severe environment is adapted, the requirement of rural power grids can be particularly met, and the quality problem of the rural power grid voltage can be effectively solved.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the following examples and drawings.
As shown in the circuit schematic diagram of the voltage regulating circuit shown in fig. 1, the voltage regulating circuit is provided with an input end, an output end and a zero line end, wherein the input end is respectively connected with the output end through a main contactor JC1 and a circuit breaker QF1, a main winding W1 is connected between the output end and the circuit breaker QF1 in series, and the input end is also connected with the zero line end through an auxiliary contactor JC2 and an adjustable winding SVR in sequence.
Specifically, the output end is connected with the voltage input end of the power distribution network, the output end serves as the voltage output end of the power distribution network and is connected with the load, and the zero line end is connected with the zero line N of the power distribution network. When the input voltage L1 of the distribution network is normal, the normally closed switch of the main contactor JC1 can be closed, and the distribution network can directly supply power to the load. When the input voltage L1 of the distribution network is abnormal, a normally closed switch of the main contactor JC1 can be switched off, the circuit breaker QF1 and the auxiliary contactor JC2 are switched on, then the winding transformation ratio between the main winding W1 and the adjustable winding SVR can be changed by adjusting the number of turns of the adjustable winding SVR, the output voltage L0 of the output end is adjusted to a normal value, and the quality of the output voltage L0 of the distribution network is ensured.
In this embodiment, preferably, the adjustable winding SVR is provided with a voltage-boosting winding module and a voltage-reducing winding module, one end of each of the voltage-boosting winding module and the voltage-reducing winding module is connected to the auxiliary contactor JC2, and the other end of each of the voltage-boosting winding module and the voltage-reducing winding module is connected to the zero line end through control switches with the same structure.
Specifically, as shown in fig. 1, the step-down winding module can reduce the output voltage L0 of the distribution network to a normal value when the input voltage L1 of the distribution network is too high. The output voltage L0 of the distribution network can be increased to a normal value by the aid of the voltage boosting winding module under the condition that the input voltage L1 of the distribution network is too low. By changing the on-off matching relationship between the control switch SF4 and the control switch SF1 connected with the step-down winding module and the step-up module, the selection between the step-down output voltage and the step-up output voltage can be carried out.
In this embodiment, preferably, the control switch is a composite switch composed of an anti-parallel thyristor group and a contactor.
Specifically, if the control switch SF1 is turned on, the anti-parallel thyristor group T1 is turned on, and then the contactor JC3 connected in parallel with the anti-parallel thyristor group is closed, the winding input speed is very fast, and the response time is short. When the contactor JC3 is closed, the current flowing through the anti-parallel thyristor group T1 is reduced to 0, so the loss is very low.
In this embodiment, preferably, the step-down winding module is provided with at least 1 step-down winding, all the step-down windings are sequentially connected in series between the auxiliary contactor JC2 and the control switch, and the common ends of the adjacent 2 step-down windings are connected with the zero line end through the switching switches with the same structure.
Specifically, in this embodiment, as shown in fig. 1, the step-down winding module is provided with 3 step-down windings, including a step-down winding W2, a step-down winding W3, and a step-down winding W4, a common end of the step-down winding W2 and the step-down winding W3 is connected to a neutral end through a switch SF2, a common end of the step-down winding W3 and the step-down winding W4 is connected to the neutral end through a switch SF3, and a step-down winding W4 is connected to the neutral end through a control switch SF 4. The number of turns of the voltage reduction winding module can be changed through the matching of the switching switch SF3 and the switching switch SF2, and therefore the winding transformation ratio between the voltage reduction winding module and the main winding W1 is changed.
In this embodiment, preferably, the switching switch is provided with an anti-parallel thyristor group and a contactor, and the anti-parallel thyristor group and the contactor are combined into a composite switch and are connected in series between the common end of the 2 step-down windings and the zero line end.
Specifically, for example, the switching switch SF2, a composite switch composed of an anti-parallel thyristor group T2 and a contactor JC4 has the characteristics of very high winding input speed, short response time and low loss.
In this embodiment, preferably, the boosting winding module is provided with at least 1 boosting winding, all boosting windings are sequentially connected in series between the auxiliary contactor JC2 and the control switch, and the common ends of the adjacent 2 boosting windings are respectively connected with the zero line end through the switching devices with the same structure. The adjustment principle of the number of turns of the voltage boosting winding module is the same as that of the voltage reducing winding module, and the details are not repeated here.
In this embodiment, preferably, the switching device is provided with an anti-parallel thyristor group and a contactor, and the anti-parallel thyristor group and the contactor are combined into a composite switch and are connected in series between the common end of the 2 boosting windings and the zero line end. The composite switch has short response time and low loss, is suitable for severe environment, and is particularly suitable for the requirements of rural power distribution networks.
The utility model provides a three-phase electricity supply circuit, every looks return circuit of three-phase electricity all is provided with foretell voltage control circuit.
Specifically, the three-phase power includes 3 live wires and 1 zero line, and 3 live wires are all connected with the above-mentioned voltage regulating circuit, and the connection of each voltage regulating circuit and corresponding live wire is as shown in fig. 1. The quality of the output voltage L0 can be ensured by respectively connecting voltage regulating circuits according to the voltage condition of each live wire and adjusting the respective output voltage L0.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.
Claims (8)
1. A voltage regulation circuit is provided with an input end, an output end and a zero line end, and is characterized in that: the input end is respectively connected with the output end through the main contactor and the circuit breaker, the main winding is connected between the output end and the circuit breaker in series, and the input end is also connected with the zero line end through the auxiliary contactor and the adjustable winding in sequence.
2. The voltage regulation circuit of claim 1, wherein: the adjustable winding is provided with a boosting winding module and a voltage-reducing winding module, one end of the boosting winding module and one end of the voltage-reducing winding module are connected with the auxiliary contactor, and the other ends of the boosting winding module and the voltage-reducing winding module are connected with a zero line end through control switches with the same structure.
3. The voltage regulation circuit of claim 2, wherein: the control switch is a composite switch formed by combining an anti-parallel thyristor group and a contactor.
4. The voltage regulation circuit of claim 2, wherein: the voltage reduction winding module is provided with at least 1 voltage reduction winding, all the voltage reduction windings are sequentially connected in series between the auxiliary contactor and the control switch, and the common ends of the adjacent 2 voltage reduction windings are connected with the zero line end through the switching switches with the same structure.
5. The voltage regulation circuit of claim 4, wherein: the switching switch is provided with an anti-parallel thyristor group and a contactor, the anti-parallel thyristor group and the contactor are combined into a composite switch, and the composite switch is connected between the common end and the zero line end of the 2 voltage reduction windings in series.
6. The voltage regulation circuit of any one of claims 2-5, wherein: the boost winding module is provided with at least 1 boost winding, all boost windings are connected in series between the auxiliary contactor and the control switch in sequence, and the common ends of the adjacent 2 boost windings are connected with the zero line end through the switching devices with the same structure.
7. The voltage regulation circuit of claim 6, wherein: the switching device is provided with an anti-parallel thyristor group and a contactor, the anti-parallel thyristor group and the contactor are combined into a composite switch, and the composite switch is connected between the common end and the zero line end of the 2 boosting windings in series.
8. A three-phase electrical supply circuit, characterized by: each phase loop of the three-phase power is provided with a voltage regulating circuit according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229053.5U CN209948676U (en) | 2019-08-01 | 2019-08-01 | Voltage regulating circuit and three-phase power supply circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229053.5U CN209948676U (en) | 2019-08-01 | 2019-08-01 | Voltage regulating circuit and three-phase power supply circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209948676U true CN209948676U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921229053.5U Active CN209948676U (en) | 2019-08-01 | 2019-08-01 | Voltage regulating circuit and three-phase power supply circuit thereof |
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| Country | Link |
|---|---|
| CN (1) | CN209948676U (en) |
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2019
- 2019-08-01 CN CN201921229053.5U patent/CN209948676U/en active Active
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