CN109991455B - Battery compensation system after intelligent electric meter battery under-voltage - Google Patents
Battery compensation system after intelligent electric meter battery under-voltage Download PDFInfo
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- CN109991455B CN109991455B CN201910092439.4A CN201910092439A CN109991455B CN 109991455 B CN109991455 B CN 109991455B CN 201910092439 A CN201910092439 A CN 201910092439A CN 109991455 B CN109991455 B CN 109991455B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/17—Compensating for errors; Adjusting or regulating means therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
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Abstract
The invention relates to the technical field of intelligent electric meter equipment, in particular to a battery compensation system after an intelligent electric meter battery is under-voltage, which comprises a reference voltage regulator, a compensation circuit and a reporting communication module, wherein a first input end of the compensation circuit is connected with an output end of the reference voltage regulator, a second input end of the compensation circuit is connected with the positive pole of the intelligent electric meter battery, a third input end of the compensation circuit is connected with an entrance wire, an output end of the compensation circuit is connected with the positive pole of a power supply electrode of the intelligent electric meter and the positive pole of the power supply of the reporting communication module, and a preset message is sent to a server through wireless communication after the reporting. The substantial effects of the invention are as follows: the compensation circuit can be triggered to compensate when the voltage of the battery of the intelligent electric meter is reduced to the set voltage through the reference voltage regulator, the setting is convenient, the triggering is reliable, compensation power supply with slightly poor voltage quality is provided in a short time through the capacitor, the intelligent electric meter is maintained to continuously work, and the reliability of the intelligent electric meter is improved.
Description
Technical Field
The invention relates to the technical field of intelligent electric meter equipment, in particular to a battery compensation system for an intelligent electric meter after battery under-voltage.
Background
The intelligent electric meter is an intelligent terminal of an intelligent power grid, and has intelligent functions such as bidirectional multi-rate metering function, user side control function, bidirectional data communication function with multiple data transmission modes, electricity larceny prevention function and the like besides the metering function of basic electricity consumption of the traditional electric meter. The intelligent electric meter has the characteristics of small starting current, no shunt running, wide load, low power consumption, straight error curve, good stability in long-term operation, small volume and convenience in installation. The intelligent electric meter represents the development direction of the intelligent terminal of the end user of the future energy-saving intelligent power grid. The intelligent electric meter has the functions of communication and logical operation, so that the power consumption of the intelligent electric meter is increased, and communication and logical operation elements require direct current power supply and have higher requirements on the quality of direct current. In order to save the cost of the alternating current-direct current conversion module, the current intelligent electric meter mostly adopts a battery power supply mode. The service life of the intelligent electric meter is as long as 8-10 years, and the power supply battery needs to be replaced for several times. And once the battery is short of electricity, the communication module of the intelligent electric meter cannot work normally, and the service center cannot timely know that the battery capacity of the intelligent electric meter is exhausted. Therefore, the electric quantity of a user is inaccurate to measure due to the fact that the electric quantity of the battery of part of the intelligent electric meters is exhausted and is not found in time, and normal operation of a power grid is influenced. Therefore, it is necessary to develop a method for compensating the electric quantity of the smart meter in a short period after the battery of the smart meter is under-voltage, reporting the electric quantity to a service center for dispatching orders to replace the battery, and maintaining the normal operation of the smart meter until an electrician enters a home to replace the battery.
Chinese patent CN201721097262.X, published in 2018, 5.22.4. A smart electric meter comprises a battery, a shell and a wiring component arranged in the shell, wherein the shell comprises a lower shell and an upper shell, the length of the lower shell is greater than that of the upper shell, the lower shell and the upper shell are both in a cuboid shape, the upper shell and the lower shell are fixed after being closed, the rear end of the lower shell is flush with the rear end of the upper shell, the wiring component is arranged in the lower shell and positioned in front of the upper shell, and a mask is covered above the wiring component; the method is characterized in that: the upper shell is provided with a window, a panel is arranged in the window, one side of the panel is pivoted on one side of the window, and the other side of the panel is fixed with the upper shell through a screw rod; the window sinks to form a battery cavity, the battery is positioned in the battery cavity, and a conductive part electrically connected with the battery is arranged in the battery cavity; the two sides of the battery are also provided with concave handhold ports. The upper shell of the technical scheme is provided with the battery cavity, and the battery is placed in the battery cavity, so that the battery is convenient to replace. However, the battery undervoltage cannot be reported to the service center actively, so that the service center cannot distribute the order to replace the battery in time, and the battery replacement by the user is not stable and reliable.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problems that the service center and the data can not be reported and stored reliably after a power supply battery is undervoltage exist in the conventional intelligent electric meter. The intelligent electric meter battery under-voltage post-battery compensation system capable of maintaining the intelligent electric meter to work in a short time is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a battery compensation system behind smart electric meter battery under-voltage, includes reference voltage regulator, compensating circuit and reports communication module, compensating circuit first input is connected with reference voltage regulator output, compensating circuit second input smart electric meter battery positive pole is connected, compensating circuit third input is connected with the service wire, and the compensating circuit output is connected with smart electric meter power supply electrode positive pole and report communication module power supply positive pole, report communication module power-on after resetting will predetermine the message and send for the server through radio communication. The reference voltage regulator is used for regulating a setting voltage value for triggering compensation, when the voltage of the battery of the intelligent electric meter is reduced to the value, the compensation circuit performs compensation power supply to maintain the intelligent electric meter to continue working, and meanwhile, the reporting communication module is communicated with the service center and reports the under-voltage of the battery of the intelligent electric meter to wait for replacement.
Preferably, the compensation circuit comprises a transformer, a rectifier bridge B1, a diode D1, a voltage stabilizing diode D2, a diode D3, a capacitor C1, a resistor R1, a MOS transistor M1, a triode T1 and a JFET transistor M2, the input end of the transformer is connected with the house phase line and the zero line, the output end of the transformer is connected with the input end of the rectifier bridge B1, the anode of the output end of the rectifier bridge B1 is connected with the anode of a diode D1, the cathode of the diode D1 is connected with the first end of a capacitor C1, the cathode of a voltage stabilizing diode D2, the drain of the MOS transistor M1 and the collector of the triode T1, the second end of the capacitor C1 and the cathode of the voltage stabilizing diode D2 are both connected with the cathode of the output end of the rectifier bridge B1, the source of the MOS transistor M1 is connected with the power supply of the reporting communication module and the anode of the power supply electrode of the intelligent ammeter, the reporting communication module, the cathode of the reporting communication module, the base electrode of the triode T1 is connected with the drain electrode of the JFET tube M2, the source electrode of the JFET tube M2 and the anode of the diode D3 are connected with the anode of the intelligent electric meter battery BT1, the grid electrode of the JFET tube M2 is connected with the first end of the reference voltage regulator, the second end of the resistor R1 and the second end of the reference voltage regulator are grounded, and the cathode of the intelligent electric meter battery BT1 is connected with the cathode of the power supply electrode of the intelligent electric meter and the cathode of the diode D3. The first input end of the compensation circuit is a JFET tube M2 grid electrode, the second input end of the compensation circuit is a JFET tube M2 source electrode, the third input end of the compensation circuit is provided with two electrodes which are respectively connected with an in-house phase line and an in-house zero line, and the output end of the compensation circuit is an MOS tube M1 source electrode.
The working principle of the compensation circuit is as follows: when the voltage of the smart meter battery BT1 drops, the GS voltage difference of the JFET tube M2 also drops, when the GS voltage difference of the JFET tube M2 drops to a value that a conductive channel can be opened, a small current can pass through between the source electrode and the drain electrode of the JFET tube M2, and the small current is amplified by the triode T1, so that the potential of the first end of the resistor R1 is enough to open the MOS tube M1, after the MOS tube M1 is conducted, the capacitor C1 can supply power to the reporting communication module and the smart meter through the MOS tube M1, the reporting communication module is communicated with a service center after being electrified, the battery under-voltage is reported, and the service center arranges replacement. The potential of the grid electrode of the JFET tube M2 can be adjusted through the reference voltage adjuster, so that the GS voltage difference of the JFET tube M2 under the voltage value of the battery BT1 of the intelligent electric meter can be adjusted, the opening time of the JFET tube M2 is controlled, and the purpose of setting the voltage of the battery BT1 of the intelligent electric meter during trigger compensation is achieved.
Preferably, the intelligent electric meter further comprises a memory, the memory is connected with the reporting communication module, and the intelligent electric meter user address information is stored in the memory. The storage can permanently store the relevant information of the user, such as the user address, so that the service center can accurately obtain the position of the intelligent electric meter, and the dispatching is convenient.
Preferably, the reference voltage regulator comprises a support, a screw, a spring, pressure pad ceramics and a guard plate, the support is provided with a notch, a first side of the notch is a supporting part, a blind hole is processed at the end face of a second side of the notch, a first end of the spring is fixed at the bottom of the blind hole, the free length of the spring is greater than the depth of the blind hole, the guard plate is fixed on each of the polarized positive and negative end faces of the piezoelectric ceramics, a threaded hole is processed at the position of the supporting part corresponding to the blind hole, the screw is screwed into the threaded hole, the guard plate at the first end of the piezoelectric ceramics is fixedly connected with the free end of the spring, the guard plate at the second end of the piezoelectric ceramics is abutted against the screw, the polarized positive electrode of the piezoelectric ceramics is grounded, the polarized negative electrode of the piezoelectric ceramics is. The pressure applied to the piezoelectric ceramic by the screw enables a voltage difference related to the pressure to be generated between two polarized end faces of the piezoelectric ceramic, and the purpose of finely adjusting the grid potential of the JFET tube M2 is achieved.
Preferably, the screw further comprises a scale ring, the scale ring is hinged to the supporting portion and is substantially concentric with the threaded hole, and the threaded surface of the screw is provided with a groove penetrating the length of the screw. The use method of the scale ring comprises the following steps: firstly, slowly screwing the screw until the spring is just extruded into the blind hole, wherein the guard plate is just contacted with the base, the deformation amount of the spring is known, the pressure on the piezoelectric ceramic is also known, the voltage difference between two polarized end faces of the piezoelectric ceramic can be known by measuring the voltage difference between the two polarized end faces of the piezoelectric ceramic in advance, the voltage difference is called as an initial voltage difference, the scale ring is rotated to enable the notch on the screw to be aligned with the initial voltage difference, then the screw is continuously rotated to enable the notch on the screw to be aligned with the scale on the scale ring corresponding to the expected JFET tube M2 grid potential, and the scale on the scale ring can be obtained by experimental calibration. The GS voltage difference of the JFET tube M2 for opening the conducting channel is obtained according to the element specification, and the expected grid potential of the JFET tube M2 can be obtained according to the voltage of the smart meter battery BT1 and the GS voltage difference of the JFET tube M2 for opening the conducting channel during expected trigger compensation.
Preferably, the transformer is a piezoelectric ceramic transformer. The piezoelectric ceramic transformer has the advantages of small volume, small heat productivity and low noise, and is suitable for being used in the intelligent electric meter in stages.
The substantial effects of the invention are as follows: the compensation circuit can be triggered to compensate when the voltage of the battery of the intelligent electric meter is reduced to the set voltage through the reference voltage regulator, the setting is convenient, the triggering is reliable, compensation power supply is provided in a short time through the capacitor, the intelligent electric meter is maintained to continue working, and the reliability of the intelligent electric meter is improved.
Drawings
Fig. 1 is a schematic structural diagram of a battery compensation system according to an embodiment.
FIG. 2 is a schematic diagram of a compensation circuit according to an embodiment.
FIG. 3 is a schematic diagram of a reference voltage regulator according to a second embodiment.
FIG. 4 is a schematic diagram of a three-dimensional structure of a reference voltage regulator according to a second embodiment.
Wherein: 1. the intelligent power supply system comprises a transformer, 2, screws, 3, a supporting part, 4, a protective plate, 5, piezoelectric ceramics, 6, a support, 7, a scale ring, 8, a groove, 100, a service phase line, 200, a reference voltage regulator, 300, a compensation circuit, 400, a reporting communication module, 500 and an intelligent power supply electrode.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
The first embodiment is as follows:
a battery compensation system after the battery of an intelligent electric meter is under-voltage is shown in figure 1, and is a structural schematic diagram of the battery compensation system in the embodiment, the embodiment includes a reference voltage regulator 200, a compensation circuit 300 and a reporting communication module 400, a first input end of the compensation circuit 300 is connected with an output end of the reference voltage regulator 200, a second input end of the compensation circuit 300 is connected with a positive electrode of the battery of the intelligent electric meter, a third input end of the compensation circuit 300 is connected with an entrance wire, an output end of the compensation circuit 300 is connected with a positive electrode of a power supply electrode 500 of the intelligent electric meter and a power supply positive electrode of the reporting communication module 400, and a preset message is sent to a server through wireless communication after the reporting communication module 400 is powered. The reference voltage regulator 200 is configured to regulate a set voltage value for triggering compensation, and when the voltage of the battery of the smart meter drops to the set voltage value, the compensation circuit 300 performs compensation power supply to maintain the smart meter to continue working, and simultaneously reports the communication module 400 to communicate with a service center, reports the under-voltage of the battery of the smart meter, and waits for replacement.
As shown in fig. 2, in order to implement a schematic diagram of a compensation circuit according to an embodiment, the compensation circuit 300 includes a transformer 1, a rectifier bridge B1, a diode D1, a zener diode D2, a diode D3, a capacitor C1, a resistor R1, a MOS transistor M1, a triode T1, and a JFET M2, an input end of the transformer 1 is connected to the service phase line 100 and the neutral line, an output end of the transformer 1 is connected to an input end of the rectifier bridge B1, an anode of an output end of the rectifier bridge B1 is connected to an anode of the diode D1, a cathode of the diode D1 is connected to a first end of the capacitor C1, a cathode of the zener diode D2, a drain of the MOS transistor M1, and a collector of the triode T1, a second end of the capacitor C1 and a cathode of the zener diode D2 are both connected to a cathode of an output end of the rectifier bridge B1, a source of the MOS transistor M1 is connected to a power supply, the grid electrode of the MOS tube M1 is connected with the emitter electrode of the triode T1 and the first end of the resistor R1, the base electrode of the triode T1 is connected with the drain electrode of the JFET tube M2, the source electrode of the JFET tube M2 and the anode electrode of the diode D3 are both connected with the anode electrode of the smart meter battery BT1, the grid electrode of the JFET tube M2 is connected with the first end of the reference voltage regulator 200, the second end of the resistor R1 and the second end of the reference voltage modulator are both grounded, and the cathode electrode of the smart meter battery BT1 is connected with the cathode electrode of the power supply electrode of the. The reference voltage regulator 200 employs an adjustable voltage regulation element that is powered by a capacitor C1. The first input end of the compensation circuit 300 is a JFET M2 grid, the second input end of the compensation circuit 300 is a JFET M2 source, the third input end of the compensation circuit 300 is provided with two electrodes which are respectively connected with the home phase line 100 and the home zero line, and the output end of the compensation circuit 300 is a MOS transistor M1 source.
The working principle of the compensation circuit 300 is as follows: when the voltage of the smart meter battery BT1 drops, the GS voltage difference of the JFET tube M2 also drops, when the GS voltage difference of the JFET tube M2 drops to a value that a conductive channel can be opened, a small current can pass through between the source and the drain of the JFET tube M2, and the small current is amplified by the triode T1, so that the potential of the first end of the resistor R1 is enough to open the MOS tube M1, after the MOS tube M1 is conducted, the capacitor C1 can supply power to the reporting communication module 400 and the smart meter through the MOS tube M1, the capacitor C1 is charged by an entrance wire through the rectifier bridge B1 and the transformer 1, after the reporting communication module 400 is electrified, the reporting communication module communicates with a service center, the undervoltage of the battery is reported, and the service center arranges and. The reference voltage regulator 200 can regulate the grid potential of the JFET tube M2, so that the GS voltage difference of the JFET tube M2 under the voltage value of the BT1 of the intelligent electric meter can be regulated, the opening time of the JFET tube M2 is controlled, and the purpose of setting the voltage of the BT1 of the intelligent electric meter during trigger compensation is achieved.
The memory is connected with the reporting communication module 400, and the user address information of the intelligent electric meter is stored in the memory. The storage can permanently store the relevant information of the user, such as the user address, so that the service center can accurately obtain the position of the intelligent electric meter, and the dispatching is convenient.
Example two:
a battery compensation system after an intelligent electric meter battery under-voltage, in the embodiment, a reference voltage regulator 200 is improved, as shown in FIG. 3, a schematic structural diagram of a reference voltage regulator in the second embodiment is shown, as shown in FIG. 4, a schematic structural diagram of a reference voltage regulator in the second embodiment is shown, in the embodiment, the reference voltage regulator 200 comprises a support 6, a screw 2, a spring, pressure pad ceramic and a guard plate 4, the support 6 is provided with a notch, a support part 3 is arranged on a first side of the notch, a blind hole is processed on an end surface of a second side of the notch, a first end of the spring is fixed at the bottom of the blind hole, the free length of the spring is greater than the depth of the blind hole, the guard plate 4 is fixed on both polarized positive and negative end surfaces of piezoelectric ceramic 5, a threaded hole is processed on a position of the support part 3 corresponding to the blind hole, the screw 2 is screwed into the threaded hole, the polarized positive electrode of the piezoelectric ceramic 5 is grounded, the polarized negative electrode of the piezoelectric ceramic 5 is connected with the end P1, and the end P1 is used as the output end of the reference voltage regulator 200. The pressure applied to the piezoelectric ceramic 5 by the screw 2 enables a voltage difference related to the pressure to be generated between two polarized end faces of the piezoelectric ceramic 5, and the purpose of finely adjusting the grid potential of the JFET tube M2 is achieved.
The screw is characterized by further comprising a scale ring 7, wherein the scale ring 7 is hinged to the supporting portion 3, the scale ring 7 is basically concentric with the threaded hole, and a groove 8 penetrating the length of the screw 2 is machined in the threaded surface of the screw 2. The use method of the scale ring 7 comprises the following steps: firstly, the screw 2 is slowly screwed until the spring is just extruded into the blind hole, at the moment, the protective plate 4 is just contacted with the base, the deformation quantity of the spring is known, the pressure on the piezoelectric ceramic 5 is also known, the voltage difference between two polarized end faces of the piezoelectric ceramic 5 can be known at the moment by measuring the voltage difference between the two polarized end faces of the piezoelectric ceramic 5 in advance, the voltage difference is called as an initial voltage difference, the scale ring 7 is rotated to enable the notch 8 on the screw 2 to be aligned with the initial voltage difference, then the screw 2 is continuously rotated to enable the notch 8 on the screw 2 to be aligned with the scale on the scale ring 7 corresponding to the expected grid potential of the JFET tube M2, and the scale on the scale ring 7 can be obtained through. The GS voltage difference of the JFET tube M2 for opening the conducting channel is obtained according to the element specification, and the expected grid potential of the JFET tube M2 can be obtained according to the voltage of the smart meter battery BT1 and the GS voltage difference of the JFET tube M2 for opening the conducting channel during expected trigger compensation.
The transformer 1 is a piezoelectric ceramic transformer. The piezoelectric ceramic transformer has the advantages of small volume, small heat productivity and low noise, and is suitable for being used in the intelligent electric meter in stages. The rest of the structure is the same as the first embodiment.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (5)
1. A battery compensation system after the battery of an intelligent ammeter is under-voltage is characterized in that,
the intelligent electric meter comprises a reference voltage regulator, a compensation circuit and a reporting communication module, wherein a first input end of the compensation circuit is connected with an output end of the reference voltage regulator, a second input end of the compensation circuit is connected with a battery anode of an intelligent electric meter, a third input end of the compensation circuit is connected with a service wire, an output end of the compensation circuit is connected with a power supply electrode anode of the intelligent electric meter and a power supply anode of the reporting communication module, and a preset message is sent to a server through wireless communication after the reporting communication module is powered on and reset;
the compensation circuit comprises a transformer, a rectifier bridge B1, a diode D1, a voltage-stabilizing diode D2, a diode D3, a capacitor C1, a resistor R1, a MOS tube M1, a triode T1 and a JFET tube M2, wherein the input end of the transformer is connected with an entrance line and a zero line, the output end of the transformer is connected with the input end of the rectifier bridge B1, the anode of the output end of the rectifier bridge B1 is connected with the anode of a diode D1, the cathode of the diode D1 is connected with the first end of a capacitor C1, the cathode of a voltage-stabilizing diode D2, the drain of the MOS tube M1 and the collector of the triode T1, the second end of the capacitor C1 and the cathode of a voltage-stabilizing diode D2 are connected with the cathode of the output end of the rectifier bridge B1, the source of the MOS tube M1 is connected with the power supply anode of the power supply communication module and the anode of the power supply electrode of the intelligent electricity meter, the power supply cathode of the, the base electrode of the triode T1 is connected with the drain electrode of the JFET tube M2, the source electrode of the JFET tube M2 and the anode of the diode D3 are connected with the anode of the intelligent electric meter battery BT1, the grid electrode of the JFET tube M2 is connected with the first end of the reference voltage regulator, the second end of the resistor R1 and the second end of the reference voltage regulator are grounded, and the cathode of the intelligent electric meter battery BT1 is connected with the cathode of the power supply electrode of the intelligent electric meter and the cathode of the diode D3.
2. The system of claim 1, wherein the system comprises a battery compensation module,
the intelligent electric meter further comprises a memory, wherein the memory is connected with the reporting communication module, and the intelligent electric meter user address information is stored in the memory.
3. The system for compensating the battery under-voltage of the intelligent electric meter according to the claim 1 or 2,
the reference voltage regulator comprises a support, a screw, a spring, piezoelectric ceramics and a protection plate, wherein the support is provided with a notch, a first side of the notch is a supporting part, a blind hole is processed at the end face of a second side of the notch, a first end of the spring is fixed at the bottom of the blind hole, the free length of the spring is greater than the depth of the blind hole, the protection plate is fixed on the end faces of the polarized positive electrode and the polarized negative electrode of the piezoelectric ceramics, a threaded hole is processed at the position of the supporting part corresponding to the blind hole, the screw is screwed into the threaded hole, the protection plate at the first end of the piezoelectric ceramics is fixedly connected with the free end of the spring, the protection plate at the second end of the piezoelectric ceramics is abutted against the screw, the polarized positive electrode of the piezoelectric ceramics is grounded, the polarized negative.
4. The system of claim 3, wherein the system comprises a battery compensation module,
the screw is characterized by further comprising a scale ring, the scale ring is hinged to the supporting portion and basically concentric with the threaded hole, and a groove penetrating the length of the screw is machined in the threaded surface of the screw.
5. The system of claim 1, wherein the system comprises a battery compensation module,
the transformer is a piezoelectric ceramic transformer.
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