CN101414399A - Single-phase pre-payment electric energy control device and electric energy metering system - Google Patents
Single-phase pre-payment electric energy control device and electric energy metering system Download PDFInfo
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- CN101414399A CN101414399A CNA2008102178446A CN200810217844A CN101414399A CN 101414399 A CN101414399 A CN 101414399A CN A2008102178446 A CNA2008102178446 A CN A2008102178446A CN 200810217844 A CN200810217844 A CN 200810217844A CN 101414399 A CN101414399 A CN 101414399A
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Abstract
The invention provides a single-phase prepayment electric energy control device and an electric energy metering system, which is suitable for the electric energy metering field. The single-phase prepayment electric energy control device comprises a prepayment controller, a double-loop magnetic holding relay arranged outside the prepayment controller, wherein, the prepayment controller is used for metering and monitoring the electric power consumption of users in real time, and when the electric power consumption of the users exceeds the set value, a warning switch-off signal is output; and the double-loop magnetic holding relay is connected with the prepayment controller and receives the warning switch-off signal, and meanwhile, live line and null line loops are disconnected. Since the single-phase prepayment electric energy control device adopts the external double-loop magnetic holding relay, when the electric quantity purchased in advance is used up, the null line loop and the live line loop can be simultaneously disconnected, and the invention has the advantages of high reliability, good security, low cost and tamper preventing function.
Description
Technical field
The invention belongs to the electric energy metrical field, relate in particular to a kind of single-phase pre-payment electric energy control device and electric energy metered system.
Background technology
Along with improving constantly of living standard, the residential electricity consumption load also constantly increases, and by 5 (20) A, 10 (40) A or 10 (60) A or even 20 (80) A till now in past, the electric current that the user power utilization load surpasses 60A is called big electric current; The user power utilization amount of metering high current load is taked dual mode usually: a kind of mode is that the single-phase pre-payment electric energy meter of 2 10 (40) A is installed, and adopts this mode to need measuring and calculating power load earlier, then on mean allocation to two electric energy meter; Will use two prepaid cards to buy electricity simultaneously, and single loop measure, single loop is operated a switch, and uses inconvenient; Another kind of mode is to introduce three-phase electricity, uses the prepayment meter of 3 * 30 (100) A, adopts this mode to cause the cost height.
Summary of the invention
The purpose of the embodiment of the invention is to provide the single-phase pre-payment electric energy control device that a kind of cost is low, reliability is high, security is good, can be anti-electricity-theft.
The embodiment of the invention is achieved in that a kind of single-phase pre-payment electric energy control device, comprising:
Pre-payment controller, metering and real-time supervisory user power consumption, when user power utilization electric weight during above setting value, the output alarm signal of operating a switch;
Be placed on the two-circuit magnetic latching relay of described pre-payment controller, be connected, receive the described warning signal of operating a switch, and disconnect live wire and zero line loop simultaneously with described pre-payment controller.
The purpose of the embodiment of the invention also is to provide a kind of single-phase pre-payment electric energy metering system, described single-phase pre-payment electric energy metering system comprises: clearing electric weight electric energy meter and the electric energy control device that is connected with described clearing electric weight electric energy meter, and described electric energy control device further comprises:
Pre-payment controller, metering and real-time supervisory user power consumption, when user power utilization electric weight during above setting value, the output alarm signal of operating a switch;
Be placed on the two-circuit magnetic latching relay of described pre-payment controller, be connected, receive the described warning signal of operating a switch, and disconnect live wire and zero line loop simultaneously with described pre-payment controller.
The single-phase pre-payment electric energy control device that the embodiment of the invention provides adopts external two-circuit magnetic latching relay, make when the forward purchasing electric weight is used up, can disconnect zero line and live wire loop simultaneously, the reliability height, security is good, cost is low, have anti-stealing electricity function.
Description of drawings
Fig. 1 is the structural drawing of the single-phase pre-payment electric energy metering system that provides of the embodiment of the invention;
Fig. 2 is the structural drawing of pre-payment controller in the single-phase pre-payment electric energy metering system that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Single-phase pre-payment electric energy metering system that the embodiment of the invention provides adopts external two-circuit magnetic latching relay, makes when the forward purchasing electric weight is used up, and can disconnect zero line and live wire loop simultaneously, and reliability height, security are good.
Fig. 1 shows the structure of the single-phase pre-payment electric energy metering system that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
The single-phase pre-payment electric energy metering system comprises: clearing electric weight electric energy meter 1 and the single-phase pre-payment electric energy control device that is connected with clearing electric weight electric energy meter 1, wherein, single-phase pre-payment electric energy control device further comprises: pre-payment controller 2, metering and real-time supervisory user power consumption, when the user power utilization electric weight surpasses setting value, the output alarm signal of operating a switch; Be placed on the two-circuit magnetic latching relay 4 of pre-payment controller 2, be connected, receive the signal of operating a switch of reporting to the police, and disconnect live wire and zero line loop simultaneously with pre-payment controller 2.
Wherein, clearing electric weight electric energy meter 1 is the electric energy meter with electric energy metrical function, can freely be disposed by the client, can dispose single-phase electricity sublist, single-phase stem-winder, also can be the electric energy meter of any company, any model, is mainly used in and calculates the user power utilization electric weight.
As one embodiment of the present of invention, single-phase pre-payment electric energy control device also comprises: the driving circuit 3 of operating a switch of reporting to the police, be connected between pre-payment controller 2 and the two-circuit magnetic latching relay 4, and be used to drive 4 two-circuit magnetic latching relays 4 and operate a switch.
As an alternative embodiment of the invention, single-phase pre-payment electric energy control device also comprises: air switch 5, be connected between pre-payment controller 2 and the two-circuit magnetic latching relay 4, and air switch 5 disconnects the electricity consumption loop when the user need change wiring.
The single-phase pre-payment electric energy metering system that the embodiment of the invention provides can measure the user's electric weight that writes down on zero line and the live wire simultaneously, and adopts the two-circuit magnetic latching relay can disconnect zero line and live wire loop simultaneously, has anti-stealing electricity function.
In embodiments of the present invention, the structure of pre-payment controller 2 for convenience of explanation, only shows the part relevant with the embodiment of the invention as shown in Figure 2, and details are as follows.
In embodiments of the present invention, pre-payment interface circuit 208 is the IC-card interface, is used to realize the physical connection of prepaid card and microcontroller 200, and when the user bought electricity, the electricity charge existed on the IC-card, and when user power utilization, microcontroller 200 is reduced the residue electricity charge in real time.As one embodiment of the present of invention, IC-card comprises: IC storage card, IC smart card and IC radio-frequency card.
As one embodiment of the present of invention, pre-payment controller 2 also comprises power supply 202, operating voltage is provided for microcontroller 200, first sample circuit 203, first metering circuit 204, second sample circuit 205, second metering circuit 206 respectively.
In embodiments of the present invention, pre-payment controller 2 also comprises clock circuit 207, display module 212 and the memory circuit 211 that is connected with microcontroller 200 respectively; Wherein, clock circuit 207 be used for real-time clock setting, read and calibrate, provide time reference to total system; As one embodiment of the present of invention, adopt the temperature compensated clock circuit, because the used crystal oscillator difference variation of real time clock circuit is big, clocking error is more than several hrs year when serious, after adopting the temperature compensated clock circuit, the time difference in year is improved the accuracy of multiple rate electric weight in a few minutes.Display module 212 further comprises: electronic display unit (LED and LCD) and mechanical display unit; Be used to show relevant information and indication correlation behavior, show the accumulative total power consumption, show relevant ammeter and parameter information, show current period rate indication, pulse indication, power alarm indication and communication indication.Memory circuit 211 is used to store the user power utilization electric weight and the electricity charge etc., generally adopts the non-volatile storer.
As one embodiment of the present of invention, pre-payment controller 2 also comprises serial communication circuit 213 and the infrared communication circuit 210 that is connected with microcontroller 200 respectively; Wherein, the communication expansion interface of serial communication circuit 213 for reserving connects wireless communication module, promptly can connect the GPRS communication module; Also can be CDMA communication module or GSM communication module.When the electric power policy changed, the program in the microcontroller 200 can be passed through the communication unit remote upgrade, guaranteed power supply, electricity consumption both sides' interests; Simultaneously, give control center,, can also early warning, the information of operating a switch initiatively be delivered to the user by control center so that Utilities Electric Co. grasps user's electricity consumption situation at any time by the power information that communication unit can the real-time report user.Infrared communication circuit 210, the one end is connected with microcontroller 20, the communication apparatus of other end connecting band infrared interface, by correlation parameter is set, reading of data and power failure are checked meter.
As one embodiment of the present of invention, pre-payment controller 2 also comprises the pulse input circuit 201 that is connected with microcontroller 200, and pre-payment controller 2 can insert 3 road pulse signals, conveniently expands to the meter reading terminal of water, electricity, gas.
In embodiments of the present invention, after the user bought electricity, the electricity charge or electric weight deposited in the prepaid card, when passing through pre-payment interface circuit 208 with microcontroller 200 connections in the prepaid card, microcontroller 200 control two-circuit magnetic latching relays 4 close a floodgate normally electricity consumption of user.When user power utilization, microcontroller 200 is reduced the electric weight or the electricity charge in real time according to the electric weight that calculates, can have two kinds of methods to reduce electric weight: the one, directly the electric weight that calculates by clearing electric weight electric energy meter 1 is reduced the electricity charge or electric weight, the 2nd, directly the electric weight that calculates by pre-payment controller 2 is reduced the electricity charge or electric weight, during to the whole month, the moon that freezes electric weight and pre-payment controller 2 moon of relatively settling accounts electric weight electric energy meter 1 freezes electric weight, returns the overcharge and demand payment of the shortage.When whenever walking 1 degree electric weight, the residue electricity charge of pre-payment controller 2 or electric weight calculate 1 time, up to reporting to the police, operating a switch, handle accordingly.Can limit user's load capacity, when transfiniting, report to the police, surpass the number of times that limits, operate a switch.Pre-payment controller 2 compares the power of live wire, zero line in real time, gets the calculating that its greater participates in the dump energy or the electricity charge.
The single-phase pre-payment electric energy metering system that the embodiment of the invention provides has adopted the pre-payment controller with reference electric quantity measuring and calculating function to monitor in real time the error of clearing electric weight electric energy meter, when error surpasses setting value, overproof warning message is reported control center, avoided the electricity charge dispute that causes because of overproof.
Now in conjunction with Fig. 1, Fig. 2 describes the principle of work of the single-phase pre-payment electric energy metering system that the embodiment of the invention provides in detail: clearing electric weight electric energy meter 1 is used to calculate the clearing electric weight of the actual electricity consumption of user, pre-payment controller 2 can calculate the reference electric quantity of the actual electricity consumption of user, and the error of clearing electric weight electric energy meter 1 is monitored in real time according to reference electric quantity, when the error of clearing electric weight electric energy meter 1 surpasses setting value, the GPRS communication module that inserts by serial communication circuit 213 reports control center with overproof warning message, Utilities Electric Co. just can grasp the user power utilization situation in real time like this, electricity charge dispute has been avoided in the recovery electricity charge in time.
In embodiments of the present invention, in clearing electric weight electric energy meter 1 and the pre-payment controller 2 real-time clock is arranged all, can freeze electric weight, in duration of freezing, microcontroller 200 carries out error judgment according to freezing electric weight, concrete deterministic process is as follows, for convenience of explanation, electric weight electric energy meter 1 is settled accounts in order in duration of freezing the electric weight that freezes is a (being the clearing electric weight), the electric weight that freezes of pre-payment controller 2 is b (being reference electric quantity), the electric weight error of clearing electric weight electric energy meter 1 is Xa, and the electric weight error of pre-payment controller 2 is Xb; Then calculate Xa=(a-b) * 100/a earlier; Xb=(a-b) * 100/b; Judge then whether Xa, Xb surpass 150% of electrical energy meter accuracy, and concrete judged result is divided three kinds of situations:
(1) when Xa surpass clearing electric weight electric energy meter 1 precision 150%, Xb is no more than 150% o'clock of precision of pre-payment controller 2, it is overproof then to settle accounts electric weight electric energy meter 1, pre-payment controller 2 is not overproof, then the electric weight b that freezes with pre-payment controller 2 is the clearing foundations;
(2) when Xa be no more than clearing electric weight electric energy meter 1 precision 150%, when Xb surpassed the precision 150% of pre-payment controller 2, it was not overproof then to settle accounts electric weight electric energy meter 1, pre-payment controller 2 is overproof, then the electric weight a that freezes with clearing electric weight electric energy meter 1 is the clearing foundations;
(3) when Xa surpass clearing electric weight electric energy meter 1 precision 150%, Xb surpasses 150% o'clock of precision of pre-payment controller 2, then clearing electric weight electric energy meter 1 is examined and determine again, and is moved back the benefit electric weight according to gauging error.
The single-phase pre-payment electric energy control device that the embodiment of the invention provides adopts external two-circuit magnetic latching relay, make when the forward purchasing electric weight is used up, can disconnect zero line and live wire loop simultaneously, the reliability height, security is good, cost is low, have anti-stealing electricity function; The single-phase pre-payment electric energy metering system that the while embodiment of the invention provides has adopted the pre-payment controller with reference electric quantity measuring and calculating function to monitor in real time the error of clearing electric weight electric energy meter, when error surpasses setting value, overproof warning message is reported control center, avoided the electricity charge dispute that causes because of overproof.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of single-phase pre-payment electric energy control device is characterized in that, described single-phase pre-payment electric energy control device comprises:
Pre-payment controller, metering and real-time supervisory user power consumption, when user power utilization electric weight during above setting value, the output alarm signal of operating a switch;
Be placed on the two-circuit magnetic latching relay of described pre-payment controller, be connected, receive the described warning signal of operating a switch, and disconnect live wire and zero line loop simultaneously with described pre-payment controller.
2, single-phase pre-payment electric energy control device as claimed in claim 1 is characterized in that, described single-phase pre-payment electric energy control device also comprises:
The warning driving circuit of operating a switch is connected between described pre-payment controller and the described two-circuit magnetic latching relay, is used to drive described two-circuit magnetic latching relay and operates a switch.
3, single-phase pre-payment electric energy control device as claimed in claim 1 is characterized in that, described single-phase pre-payment electric energy control device also comprises:
Air switch is connected between described pre-payment controller and the described two-circuit magnetic latching relay, and described air switch disconnects the electricity consumption loop when the user need change wiring.
4, single-phase pre-payment electric energy control device as claimed in claim 1 is characterized in that, described pre-payment controller comprises:
First sample circuit is sampled to the zero line piezoelectricity stream that powers on, and exports first sampled signal;
First metering circuit, according to described first sampled signal calculate write down on the zero line first use power consumption;
Second sample circuit is sampled to the live wire piezoelectricity stream that powers on, and exports second sampled signal;
Second metering circuit, according to described second sampled signal calculate write down on the live wire second use power consumption;
Microcontroller, with the greater between described first usefulness power consumption and the described second usefulness power consumption as the user power utilization electric weight, when described user power utilization electric weight surpasses setting value, the output alarm control signal of operating a switch;
The pre-payment interface circuit is used to realize the physical connection of prepaid card and described microcontroller, and when user power utilization, described microcontroller is reduced the remaining electricity charge in the described prepaid card in real time;
The warning circuit of operating a switch is connected with described microcontroller, according to the described warning control signal output alarm signal of operating a switch of operating a switch.
5, single-phase pre-payment electric energy control device as claimed in claim 4 is characterized in that, described pre-payment controller also comprises:
Clock circuit, display module and the memory circuit that is connected with described microcontroller respectively.
6, single-phase pre-payment electric energy control device as claimed in claim 4 is characterized in that, described pre-payment controller also comprises:
Serial communication circuit that is connected with described microcontroller and infrared communication circuit respectively.
7, single-phase pre-payment electric energy control device as claimed in claim 4 is characterized in that, described pre-payment controller also comprises:
The pulse input circuit that is connected with described microcontroller.
8, a kind of single-phase pre-payment electric energy metering system, it is characterized in that, described single-phase pre-payment electric energy metering system comprises: clearing electric weight electric energy meter and the single-phase pre-payment electric energy control device that is connected with described clearing electric weight electric energy meter, and described single-phase pre-payment electric energy control device further comprises:
Pre-payment controller, metering and real-time supervisory user power consumption, when user power utilization electric weight during above setting value, the output alarm signal of operating a switch;
Be placed on the two-circuit magnetic latching relay of described pre-payment controller, be connected, receive the described warning signal of operating a switch, and disconnect live wire and zero line loop simultaneously with described pre-payment controller.
9, single-phase pre-payment electric energy metering system as claimed in claim 8 is characterized in that, described single-phase pre-payment electric energy control device also comprises:
The warning driving circuit of operating a switch is connected between described pre-payment controller and the described two-circuit magnetic latching relay, is used to drive described two-circuit magnetic latching relay and operates a switch.
10, single-phase pre-payment electric energy metering system as claimed in claim 8 is characterized in that, described pre-payment controller comprises:
First sample circuit is sampled to the zero line piezoelectricity stream that powers on, and exports first sampled signal;
First metering circuit, according to described first sampled signal calculate write down on the zero line first use power consumption;
Second sample circuit is sampled to the live wire piezoelectricity stream that powers on, and exports second sampled signal;
Second metering circuit, according to described second sampled signal calculate write down on the live wire second use power consumption;
Microcontroller, with the greater between described first usefulness power consumption and the described second usefulness power consumption as the user power utilization electric weight, when described user power utilization electric weight surpasses setting value, the output alarm control signal of operating a switch;
The pre-payment interface circuit is used to realize the physical connection of prepaid card and described microcontroller, and when user power utilization, described microcontroller is reduced the remaining electricity charge in the described prepaid card in real time;
The warning circuit of operating a switch is connected with described microcontroller, according to the described warning control signal output alarm signal of operating a switch of operating a switch.
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| CN2008102178446A CN101414399B (en) | 2008-11-25 | 2008-11-25 | Single-phase pre-payment electric energy control device and electric energy metering system |
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| CN2008102178446A CN101414399B (en) | 2008-11-25 | 2008-11-25 | Single-phase pre-payment electric energy control device and electric energy metering system |
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| CN101414399A true CN101414399A (en) | 2009-04-22 |
| CN101414399B CN101414399B (en) | 2011-06-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183059A (en) * | 2014-09-11 | 2014-12-03 | 国家电网公司 | Prepaid card meter warning device and electric energy measuring system |
| CN105046825A (en) * | 2015-07-27 | 2015-11-11 | 中国南方电网有限责任公司 | Prepayment electric meter electricity purchasing system and method based on electric energy meter fee control technology |
| CN109061264A (en) * | 2018-08-24 | 2018-12-21 | 浙江正泰电器股份有限公司 | Electric energy meter takes the control method of control system |
| CN112462591A (en) * | 2020-12-07 | 2021-03-09 | 武汉中原电子信息有限公司 | Object-oriented communication protocol-based time synchronization method for electricity utilization acquisition terminal |
| CN114325088A (en) * | 2021-12-10 | 2022-04-12 | 国网湖南省电力有限公司 | System and method for automatically measuring and calculating electric quantity during metering fault period |
-
2008
- 2008-11-25 CN CN2008102178446A patent/CN101414399B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183059A (en) * | 2014-09-11 | 2014-12-03 | 国家电网公司 | Prepaid card meter warning device and electric energy measuring system |
| CN105046825A (en) * | 2015-07-27 | 2015-11-11 | 中国南方电网有限责任公司 | Prepayment electric meter electricity purchasing system and method based on electric energy meter fee control technology |
| CN105046825B (en) * | 2015-07-27 | 2018-03-20 | 中国南方电网有限责任公司 | A kind of pre-paying kilowatt-hour meter power purchase system and method for taking control technology based on electric energy meter |
| CN109061264A (en) * | 2018-08-24 | 2018-12-21 | 浙江正泰电器股份有限公司 | Electric energy meter takes the control method of control system |
| CN112462591A (en) * | 2020-12-07 | 2021-03-09 | 武汉中原电子信息有限公司 | Object-oriented communication protocol-based time synchronization method for electricity utilization acquisition terminal |
| CN112462591B (en) * | 2020-12-07 | 2022-04-12 | 武汉中原电子信息有限公司 | Object-oriented communication protocol-based time synchronization method for electricity utilization acquisition terminal |
| CN114325088A (en) * | 2021-12-10 | 2022-04-12 | 国网湖南省电力有限公司 | System and method for automatically measuring and calculating electric quantity during metering fault period |
| CN114325088B (en) * | 2021-12-10 | 2023-09-05 | 国网湖南省电力有限公司 | Automatic measuring and calculating system and method for electric quantity during metering fault period |
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| CN101414399B (en) | 2011-06-08 |
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