CN216979153U - Alternating current signal generating device - Google Patents
Alternating current signal generating device Download PDFInfo
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- CN216979153U CN216979153U CN202122650731.9U CN202122650731U CN216979153U CN 216979153 U CN216979153 U CN 216979153U CN 202122650731 U CN202122650731 U CN 202122650731U CN 216979153 U CN216979153 U CN 216979153U
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Abstract
The utility model discloses an alternating current signal generating device in the field of signal generation, which comprises a first switch circuit, a second switch circuit and a load starting circuit, wherein a first control signal is input into the input end of the first switch circuit, one path of the output end of the first switch circuit is connected with a live wire, the other path of the output end of the first switch circuit is connected with the anode of a diode D1, and the cathode of a diode D1 is connected with a zero line through a resistive load; a second control signal is input into the input end of the second switch circuit, one path of the output end of the second switch circuit is connected with a live wire, and the other path of the output end of the second switch circuit is connected with a zero line through a resistive load; the input end of the load starting circuit inputs a first control signal and a second control signal, one path of the output end is connected with a live wire, the other path of the output end is connected with load equipment, and the load equipment is connected with a zero line; the utility model can be used for generating periodic i and i/2 alternating current signals, and the device can be used for identifying the transformer area in the prior art.
Description
Technical Field
The utility model relates to the field of signal generation, in particular to an alternating current signal generating device.
Background
The accurate judgment of the subordination relationship between the distribution transformer and the user is always a difficult problem for power supply enterprises, and is particularly prominent in urban areas. Due to the requirement of urban development, the low-voltage power supply network is fast in change and the conditions of line adjustment and erection are common due to the fact that the normalized work of road transformation, removal, brightening and the like and the fact that most of the normalized work is buried cables. Therefore, the subordination relationship between the transformer and the user is very complicated, the work of line loss, rush repair, new installation and capacity increase and the like is difficult, and the power supply reliability is also influenced.
The subordination relation of a power station (the relation between a power point of a power consumer and a transformer of the power station area, which is called the power station for short) is required to be accurate in the work of line loss, emergency repair, new installation capacity increase and the like of the power supply enterprise. The actual accuracy of the platform relationship is not high due to the situations of historical accumulation, urban road reconstruction, pole line migration, cable grounding and the like. The equipment such as a platform area identifier used by the conventional common piece often has wrong judgment and missed judgment due to the technical characteristics of the equipment. How to make up the defects of the existing equipment and find out the accurate subscriber station relationship becomes a urgent task for line loss treatment work.
The chinese patent CN109782090B proposes a method for determining a phase change relationship between power consumers, which can detect the current changes before and after load loading by using a clamp meter on a load phase line and a low-voltage outlet line of a transformer respectively by switching a load at a power consumption end where a phase change relationship needs to be determined, and determine whether a phase line is physically connected from the transformer by determining whether the current changes are synchronous and whether the current changes are consistent, so as to determine the phase change relationship/subscriber station relationship.
The implementation of the above method requires a generator for switching loads at the electricity consuming end to generate an alternating current signal, and in accordance with this requirement, the applicant proposes an alternating current signal generator.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to an alternating current signal generating device to solve the above problems.
In order to achieve the purpose, the utility model provides the following technical scheme:
an alternating current signal generating device comprises a first switch circuit, a second switch circuit and a load starting circuit, wherein a first control signal is input into the input end of the first switch circuit, one path of the output end of the first switch circuit is connected with a live wire, the other path of the output end of the first switch circuit is connected with the anode of a diode D1, and the cathode of a diode D1 is connected with a zero wire through a resistive load; a second control signal is input into the input end of the second switch circuit, one path of the output end of the second switch circuit is connected with the live wire, and the other path of the output end of the second switch circuit is connected with the zero line through the resistive load; the input end of the load starting circuit inputs a first control signal and a second control signal, one path of the output end is connected with a live wire, the other path of the output end is connected with load equipment, and the load equipment is connected with the zero line; when the first control signal is effective, the first switch circuit is conducted; when the second control signal is effective, the second switch circuit is conducted; when any control signal is effective, the load starting circuit is conducted.
As an improvement of the present invention, the load starting circuit includes diodes D3, D5, an optocoupler U3, U5, a thyristor Q4 and a comparator U6, the first control signal is connected to a negative electrode of the diode D3, the second control signal is connected to a negative electrode of the diode D5, positive electrodes of the diodes D3 and D5 are both connected to a second input terminal of the optocoupler U3, a first input terminal of the optocoupler U3 is connected to the power supply, a first output terminal is connected to the power supply through a resistor, a second output terminal is connected to an inverting input terminal of the comparator U6 through a resistor R30, a non-inverting input terminal of the comparator U6 is sampled from the power supply voltage division through resistors R7 and R15, an output terminal is connected to a second input terminal of the optocoupler U5, a first input terminal of the optocoupler U5 is connected to the power supply, a first output terminal is connected to a T1 terminal and a live wire of the thyristor Q4 through a resistor R8, a second output terminal of the resistor R11 and a gate of the thyristor Q4, the other end of the resistor R11 is connected with the T2 end of the thyristor Q4 and one end of the load equipment, and the other end of the load equipment is connected with the zero line.
As an improvement of the present invention, the first switch circuit includes diodes D1, D6, an optocoupler U1, and a thyristor Q1, the first control signal is connected to the anode of the diode D6 and the second input terminal of the optocoupler U1 through a resistor R2, the cathode of the diode D6 is connected to the power supply and the first input terminal of the optocoupler U1, the first output terminal of the optocoupler U1 is connected to the live wire and the T1 terminal of the thyristor Q1 through a resistor R1, the second output terminal is connected to one end of the resistor R5 and the gate of the thyristor Q1, and the other end of the resistor R5 is connected to the T2 terminal of the thyristor Q1 and the anode of the diode D1.
As an improved scheme of the present invention, the second switch circuit includes diodes D3, D7, an optocoupler U2, and a thyristor Q3, the second control signal is connected to the positive electrode of the diode D7 and the second input terminal of the optocoupler U2 through a resistor R4, the negative electrode of the diode D7 is connected to the power supply and the first input terminal of the optocoupler U2, the first output terminal of the optocoupler U2 is connected to the live wire and the T1 terminal of the thyristor Q3 through a resistor R6, the second output terminal is connected to one end of the resistor R510 and the gate of the thyristor Q3, and the other end of the resistor R10 is connected to the T2 terminal of the thyristor Q3 and the negative electrode of the diode D1.
As a modified scheme of the utility model, the load equipment is a fan.
Has the advantages that: the utility model provides an alternating current signal generating device which can be used for generating periodic i and i/2 alternating current signals and can be used for station area identification in the prior art.
Drawings
FIG. 1 is a schematic illustration of the practice of the present invention;
FIG. 2 is an overall schematic view of the present invention;
fig. 3 is an overall circuit diagram of the present invention.
In the figure: 1-a load turn-on circuit; 2-a first switching circuit; 3-second turn on circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, the alternating current signal generating device is arranged at the electricity utilization end and connected with the second host wiring, the first host is arranged at the transformer end, and the A, B, C three-phase wires of the transformer are all provided with current clamps for detecting current signals at the outlet end of the transformer. The first host and the second host are connected to the background management platform together, and the background management platform is connected with the APP installed on the terminal.
Referring to fig. 2, the alternating current signal generating device includes a first switch circuit 2, a second switch circuit 3 and a load starting circuit 1, wherein a first control signal is input to an input end of the first switch circuit 2, one path of an output end of the first switch circuit is connected to a live wire, the other path of the output end of the first switch circuit is connected to an anode of a diode D1, and a cathode of a diode D1 is connected to a neutral wire through a resistive load; a second control signal is input into the input end of the second switch circuit 3, one path of the output end of the second switch circuit is connected with a live wire, and the other path of the output end of the second switch circuit is connected with a zero line through a resistive load; the input end of the load starting circuit 1 inputs a first control signal and a second control signal, one path of the output end is connected with a live wire, the other path of the output end is connected with load equipment, and the load equipment is connected with a zero line.
When the first control signal is effective, the first switch circuit 2 is conducted with the load starting circuit 1, the diode D1 is conducted, the first switch circuit 2, the diode D1, the resistive load, the zero line and the live line form a closed loop, and since the diode D1 can only conduct half-waves, i/2 current signals are generated on the resistive load; the load starting circuit is simultaneously conducted, the power utilization end is loaded with load equipment, the first host can detect the current change at the power utilization end before and after the load equipment is loaded, and the second host passes through the current clamp to detect the current change on the line of the outgoing line end of the transformer before and after the load equipment is loaded. Through experiments, data are recorded, and then whether the changes of the two currents are synchronous or not and whether the changes are consistent or not are judged.
When the second control signal is valid, the second switch circuit 3 is turned on with the load starting circuit 1, and since the second switch circuit 3 is directly connected with the resistive load and does not filter half waves through the diode D1, i current signals are generated on the resistive load. The remaining principle is the same as the principle when the first control signal is valid, and is not described again.
The second host is placed at the power utilization end, and controls the alternating current signal generating device to generate periodic i and i/2 alternating current signals by alternately outputting effective first control signals and second control signals. When the first host detects that the current signal of the outlet end of the transformer is the same as the signal generated by the signal generating device, the second host and the first host are in the same transformer area and in the same phase sequence.
It should be noted that the first control signal and the second control signal are not valid at the same time.
As shown in fig. 3, as a possible implementation, the load starting circuit 1 includes diodes D3, D5, optocouplers U3, U5, a thyristor Q4, and a comparator U6, a first control signal is connected to a cathode of the diode D3, a second control signal is connected to a cathode of the diode D5, anodes of the diodes D3 and D5 are both connected to a second input terminal of the optocoupler U3 through a resistor R13, a first input terminal of the optocoupler U3 is connected to the power supply, a first output terminal is connected to one end of the resistor R12, the other end of the resistor R12 is connected to the power supply and one end of the resistor R9, and the other end of the resistor R9 is connected to a first input terminal of the optocoupler U5; the second output end of the optical coupler U3 is grounded through a capacitor C3 and a resistor R3 respectively, and is also connected with the inverting input end of a comparator U6 through a resistor R30, the non-inverting input end of a comparator U6 is grounded through a resistor R15 and a capacitor C5 respectively, and is also connected with a power supply through a resistor R7; the output end of the comparator U6 is connected with the second input end of the optical coupler U5, the first output end of the optical coupler U5 is connected with the T1 end and the live wire of the controlled silicon Q4, the second output end is connected with one end of the resistor R11 and the gate pole of the controlled silicon Q4, the other end of the resistor R11 is connected with the T2 end of the controlled silicon Q4 and one end of the load device, the two ends of the controlled silicon Q4 are connected with the resistor R14 and the capacitor C1 which are connected in series in parallel, and the other end of the load device is connected with the zero wire.
In this embodiment, the load device is configured as a fan, and the operating condition of the load device can be visually observed. When the low level of the first control signal or the second control signal is effective, the optocoupler U3 is turned on, the power supply charges the capacitor C3 through the resistor R12 and outputs voltage to the inverting input end of the comparator U6, the resistors R7 and R15 perform voltage division sampling from the power supply and input the voltage as reference voltage to the non-inverting input end of the comparator U6, because the voltage of the current inverting input end is higher than the reference voltage of the non-inverting input end, the comparator U6 outputs low level, the optocoupler U5 is turned on, the thyristor Q4 is turned on, and the fan is electrified and operated.
When the first control signal or the second control signal is removed, the energy stored in the capacitor C3 is slowly consumed by the resistor R3, so that the voltage at the inverting input terminal of the comparator U6 is maintained to be higher than the voltage at the non-inverting input terminal for a period of time, and the output low level is continuously maintained, so that the fan continuously operates for a period of time, and the fan can further dissipate heat on the resistive load R6.
As an alternative embodiment, the first switch circuit 2 includes diodes D1, D6, an optocoupler U1 and a thyristor Q1, the first control signal is connected to the anode of the diode D6 and the second input terminal of the optocoupler U1 through a resistor R2, the cathode of the diode D6 is connected to the power supply and the first input terminal of the optocoupler U1, the first output terminal of the optocoupler U1 is connected to the hot line and the T1 terminal of the thyristor Q1 through a resistor R1, the second output terminal is connected to one end of the resistor R5 and the gate of the thyristor Q1, and the other end of the resistor R5 is connected to the T2 terminal of the thyristor Q1 and the anode of the diode D1.
When the first control signal is active low, the optocoupler U1 turns on, driving the thyristor Q1 to turn on, thereby turning on the resistive load.
As an alternative embodiment, the second switch circuit 3 has the same structure as the first switch circuit 2, and specifically, the second switch circuit 3 includes diodes D3 and D7, an optocoupler U2 and a thyristor Q3, the second control signal is connected to the anode of the diode D7 and the second input terminal of the optocoupler U2 through a resistor R4, the cathode of the diode D7 is connected to the power supply and the first input terminal of the optocoupler U2, the first output terminal of the optocoupler U2 is connected to the live wire and the T1 terminal of the thyristor Q3 through a resistor R6, the second output terminal is connected to one end of the resistor R510 and the gate of the thyristor Q3, and the other end of the resistor R10 is connected to the T2 terminal of the thyristor Q3 and the cathode of the diode D1.
When the second control signal is active low, the optocoupler U2 turns on, driving the thyristor Q3 to turn on, thereby turning on the resistive load.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (5)
1. An alternating current signal generating device is characterized by comprising a first switch circuit, a second switch circuit and a load starting circuit, wherein a first control signal is input into the input end of the first switch circuit, one path of the output end of the first switch circuit is connected with a live wire, the other path of the output end of the first switch circuit is connected with the anode of a diode D1, and the cathode of a diode D1 is connected with a zero wire through a resistive load; a second control signal is input into the input end of the second switch circuit, one path of the output end of the second switch circuit is connected with the live wire, and the other path of the output end of the second switch circuit is connected with the zero line through the resistive load; the input end of the load starting circuit inputs a first control signal and a second control signal, one path of the output end is connected with a live wire, the other path of the output end is connected with load equipment, and the load equipment is connected with the zero line; when the first control signal is effective, the first switch circuit is conducted; when the second control signal is effective, the second switch circuit is conducted; when any control signal is effective, the load starting circuit is conducted.
2. The ac current signal generating apparatus of claim 1, wherein the load turn-on circuit comprises diodes D3, D5, optocouplers U3, U5, thyristors Q4, and a comparator U6, the first control signal is connected to the cathode of the diode D3, the second control signal is connected to the cathode of the diode D5, the anodes of the diodes D3, D5 are both connected to the second input terminal of the optocoupler U3, the first input terminal of the optocoupler U3 is connected to the power supply, the first output terminal is connected to the power supply through a resistor R30, the second output terminal is connected to the inverting input terminal of the comparator U6 through resistors R30, the non-inverting input terminal of the comparator U6 is sampled from the power supply voltage division through resistors R7, R15, the output terminal is connected to the second input terminal of the optocoupler U5, the first input terminal of the optocoupler U5 is connected to the power supply, the first output terminal is connected to the T1 terminal of the Q4 and the live line through a resistor R8, the second output end is connected with one end of a resistor R11 and a gate electrode of a thyristor Q4, the other end of the resistor R11 is connected with a T2 end of the thyristor Q4 and one end of load equipment, and the other end of the load equipment is connected with a zero line.
3. An ac current signal generating device as claimed in claim 1 or 2, wherein said first switch circuit comprises diodes D1, D6, optocoupler U1 and thyristor Q1, said first control signal is connected to the anode of diode D6 and the second input terminal of optocoupler U1 through resistor R2, the cathode of diode D6 is connected to the power supply and the first input terminal of optocoupler U1, the first output terminal of optocoupler U1 is connected to the hot line and the T1 terminal of thyristor Q1 through resistor R1, the second output terminal is connected to one end of resistor R5 and the gate of thyristor Q1, and the other end of resistor R5 is connected to the T2 terminal of thyristor Q1 and the anode of diode D1.
4. An ac current signal generating device as claimed in claim 1 or 2, wherein said second switch circuit comprises diodes D3, D7, optocoupler U2 and thyristor Q3, said second control signal is connected to the anode of diode D7 and the second input terminal of optocoupler U2 through resistor R4, the cathode of diode D7 is connected to the power supply and the first input terminal of optocoupler U2, the first output terminal of optocoupler U2 is connected to the live wire and the T1 terminal of thyristor Q3 through resistor R6, the second output terminal is connected to one end of resistor R510 and the gate of thyristor Q3, and the other end of resistor R10 is connected to the T2 terminal of thyristor Q3 and the cathode of diode D1.
5. An alternating current signal generating apparatus according to claim 1, wherein said load device is a fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122650731.9U CN216979153U (en) | 2021-10-29 | 2021-10-29 | Alternating current signal generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122650731.9U CN216979153U (en) | 2021-10-29 | 2021-10-29 | Alternating current signal generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216979153U true CN216979153U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122650731.9U Active CN216979153U (en) | 2021-10-29 | 2021-10-29 | Alternating current signal generating device |
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|---|---|
| CN (1) | CN216979153U (en) |
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2021
- 2021-10-29 CN CN202122650731.9U patent/CN216979153U/en active Active
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