CN208921783U - Line loss fine-grained management device - Google Patents
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Abstract
The utility model provides a kind of line loss fine-grained management device, comprising: voltage acquisition module, CT acquisition module, metering acquisition module, data processing module and alarm module；The voltage acquisition module and the CT acquisition module are set to the end of incoming cables of ammeter box, are respectively used to the voltage value and current value of acquisition ammeter box front end；The metering acquisition module is used to acquire the electrical parameter of each electric supply meter in ammeter box；The data processing module is used to calculate line loss or line loss per unit according to electrical parameter collected in the voltage value, current value and the ammeter box of the ammeter box front-end collection, also judges whether the line loss or line loss per unit are more than preset threshold and send alarm signal when the line loss or line loss per unit are more than the preset threshold.The utility model can realize the real-time statistics and monitoring analysis of the line loss of the branched line as unit of ammeter box, and line loss fine-grained management level and decreasing loss working efficiency also can be improved.
Description
Technical Field
The utility model relates to an electric power system field especially relates to a line loss fine management device.
Background
Line loss in the power system is generally divided into technical line loss and management line loss, wherein the technical line loss is energy loss caused by technical parameters of equipment and a line, and the loss is inevitable; the management loss is mainly energy loss caused by management errors, such as manual electricity stealing, line leakage, short circuit and the like, and can be avoided. Therefore, the method for reducing the line loss is generally the most direct and effective method for overcoming the management line loss and avoiding unnecessary loss.
In the prior art, line loss management of a power system is mainly in a management result mode, that is, line loss rate is counted at the end of the month, and the management level of which line loss management unit and the quality of a management process are analyzed and evaluated according to the level of the month line loss rate. Since the management measures of this management mode are remedial measures that are made later according to the management situation of the previous cycle, there is a significant hysteresis and the disadvantage of the longer the management cycle, the more significant, the lower the efficiency. In addition, the minimum line loss management is based on the transformer platform area, and the management refinement degree is not high enough.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides a line loss management that becomes more meticulous solves prior art is delayed and not high scheduling problem of degree that becomes more meticulous to line loss management device.
The utility model provides a line decreases fine management device, include: the device comprises a voltage acquisition module, a CT acquisition module, a metering acquisition module, a data processing module and an alarm module; the voltage acquisition module, the CT acquisition module, the metering acquisition module and the alarm module are all connected with the data processing module;
the voltage acquisition module and the CT acquisition module are arranged at the wire inlet end of the electric meter box and are respectively used for acquiring the voltage value and the current value of the front end of the electric meter box;
the metering acquisition module is connected with the user electric meters in the electric meter box and is used for acquiring electric quantity parameters of the user electric meters in the electric meter box;
the data processing module is used for calculating line loss or line loss rate according to the voltage value and the current value acquired at the front end of the electric meter box and the electric quantity parameter acquired in the electric meter box, judging whether the line loss or the line loss rate exceeds a preset threshold value and sending an alarm signal when the line loss or the line loss rate exceeds the preset threshold value;
and the alarm module is used for giving an alarm in real time according to the alarm signal.
As further optional scheme, the utility model discloses line loss fine-tuning management device still includes: a wireless communication module,
the wireless communication module is connected with the data processing module and used for sending the line loss data obtained by calculation of the data processing module and the alarm signal to a remote terminal so as to realize remote monitoring and alarm.
As a further optional scheme, the voltage collecting module includes a voltage reducing circuit, a sampling circuit and a converting circuit, the voltage reducing circuit, the sampling circuit and the converting circuit are electrically connected in sequence, wherein,
the voltage reduction circuit is used for collecting input voltage of the electricity meter box inlet wire end and carrying out voltage reduction processing on the input power supply;
the sampling circuit is used for carrying out alternating current sampling on the voltage subjected to voltage reduction to obtain a sampling voltage;
the conversion circuit is used for converting the sampling voltage into a digital voltage and sending the digital voltage to the data processing module.
As a further optional scheme, the metering and collecting module comprises a collector, and the collector is connected with each user electric meter in the electric meter box through an RS485 bus and collects electric quantity parameters of each user electric meter in real time.
As a further optional scheme, the CT acquisition module includes at least one current transformer, and the current transformer is configured to acquire a current value at an incoming line end of the electricity meter box and send the current value to the data processing module.
As a further optional scheme, the metering and collecting module comprises a collector, and the collector is connected with each user electric meter in the electric meter box through an RS485 bus and collects electric quantity parameters of each user electric meter in real time.
As a further alternative, the alarm module comprises a buzzer and/or an indicator light.
As a further optional solution, the wireless communication module includes: one or more of a GPRS module, a 4G module, a 3G module and a GSM module.
As further optional scheme, the utility model discloses line loss fine-tuning management device still includes: the peripheral interface module comprises one or more combinations of 485 bus interfaces, USB interfaces, RS232 interfaces and RJ5 interfaces; wherein,
the peripheral interface module is used for connecting other external equipment to the data processing module so as to realize function expansion.
As a further optional scheme, the data processing module further includes: a memory for storing a plurality of data to be transmitted,
the memory is used for storing the voltage value and the current value of the front end of the meter box, the electric quantity parameter of the rear end of the meter box and the line loss data obtained by calculation of the data processing module, which are acquired in real time.
As a further optional scheme, the data processing module includes a main controller, wherein the main controller employs an ARM-series processor chip.
The utility model provides a technical scheme has following beneficial effect:
the utility model discloses can realize the automatic detection and the analysis of the line loss of the branch circuit of using the ammeter case as the unit to report to the police in real time when the line loss surpasses and predetermine the threshold value, thereby can improve the ageing of line loss management, solved the hysteresis problem of current line loss management. In addition, the device is installed at the electric meter box, so that the refinement degree of line loss management can be further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is an application schematic diagram of a line loss fine management device according to an embodiment of the present invention;
fig. 2 is a first structural schematic diagram of a line loss fine management device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a voltage acquisition module of the line loss fine management device according to the embodiment of the present invention;
fig. 4 is a second schematic structure diagram of the line loss fine management device according to an embodiment of the present invention.
Description of the main element symbols:
10-line loss fine management device; 100-a voltage acquisition module; 101-a voltage reduction circuit; 102-a sampling circuit; 103-a conversion circuit; 200-CT acquisition module; 300-a metering acquisition module; 400-a data processing module; 500-an alarm module; 600-a wireless communication module; 700-peripheral interface module.
Detailed Description
Various embodiments of the present disclosure will be described more fully hereinafter. The present disclosure is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit the scope of the disclosure to the specific embodiments disclosed herein, but rather, the disclosure is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the disclosure.
Hereinafter, the term "includes" or "may include" used in various embodiments of the present disclosure indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present disclosure, the terms "comprising," "having," and their derivatives, are intended to be only representative of the particular features, integers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to one or more other features, integers, steps, operations, elements, components, or combinations of the foregoing.
Expressions (such as "first", "second", and the like) used in various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present disclosure.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the present disclosure. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present disclosure belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined in various embodiments of the present disclosure.
At present, most areas have completed low-voltage centralized meter reading coverage, large data analysis of a low-voltage centralized meter reading system can be realized, and furthermore, favorable conditions are created for fine analysis and management of line loss. The utility model provides a line loss management device that becomes more meticulous can realize making statistics of the line loss of using the branch circuit of ammeter case as the unit through installing the device in the inlet wire end of ammeter case to can report to the police in real time when the line hears when exceeding the threshold value, thereby can solve the not high scheduling problem enough of current line loss management lag, inefficiency and the degree of becoming more meticulous. Wherein, ammeter case is the infrastructure of concentrating equipment such as installation ammeter, switch, wire, and each district all is provided with this ammeter case in order to conveniently carry out power consumption management etc..
Examples
Referring to fig. 1, according to the fine line loss management device 10 provided in this embodiment, by installing the fine line loss management device 10 at the incoming line end of the electric meter box, fine line loss management and analysis on a branch line of the electric meter box can be achieved, and by setting a preset threshold and performing on-site or remote alarm when the current line loss or the line loss rate exceeds the preset threshold, remote monitoring of line loss management is achieved, so that illegal events such as power stealing and electric leakage can be further found and prevented in time.
Referring to fig. 2, the line loss refinement management apparatus 10 according to the present embodiment may include: the voltage acquisition module 100, the CT acquisition module 200, the metering acquisition module 300, the data processing module 400 and the alarm module 500, wherein the voltage acquisition module 100, the CT acquisition module 200, the metering acquisition module 300 and the alarm module 500 are all connected with the data processing module 400.
In this embodiment, the incoming line end of the electric meter box is all located to voltage acquisition module 100 and CT acquisition module 200, and are used for gathering the voltage value and the current value of electric meter box front end respectively, and wherein, this electric meter box can be three-phase ammeter case or single-phase ammeter case. If the incoming line end of the electric meter box is three-phase electricity, the three-phase voltage value and the three-phase current value can be respectively collected through the voltage collecting module 100 and the CT collecting module 200, and the collected three-phase voltage value and the collected three-phase current value are transmitted to the data processing module 400 to be subjected to corresponding analysis processing, such as calculating the total power of the three-phase electricity at the front end of the electric meter box. It should be understood that if the inlet end of the electric meter box is single-phase electricity, the single-phase voltage value and the single-phase current value of the inlet end of the electric meter box can be acquired.
Exemplarily, as shown in fig. 3, the voltage acquisition module 100 may include a voltage reduction circuit 101, a sampling circuit 102, and a conversion circuit 103, wherein the voltage reduction circuit 101, the sampling circuit 102, and the conversion circuit 103 are connected in sequence. Specifically, the voltage reduction circuit 101 is mainly used for collecting input voltage at the front end of the electric meter box, such as three-phase alternating current or single-phase alternating current, and reducing the voltage; the sampling circuit 102 is mainly used for performing analog sampling on the voltage after voltage reduction to obtain a sampling voltage; the conversion circuit 103 is mainly used for converting the sampling voltage output by the sampling circuit 102 into a digital voltage which can be identified and processed by the data processing module 400 and is sent to the data processing module 400.
Illustratively, the CT acquisition module 200 may include at least one current transformer, which may be used to acquire the current value of the incoming phase line of the inlet end of the electric meter box and send the current value to the data processing module 400. For example, when three-phase power is connected to the inlet end of the electric meter box, the number of the current transformers can be set to be 3, and the current transformers are respectively connected with the three phases for collecting the current values of the phases.
A plurality of user electric meters are usually installed in the electric meter box, and the user electric meters can be used for acquiring electric quantity parameters of current user loads, such as voltage, current, power factor, electric energy and the like. In this embodiment, the measurement collection module 300 is connected to each user electric meter in the electric meter box to collect electric parameters such as voltage, current, power factor, and the like of each user electric meter, and sends the electric parameters to the data processing module 400 after the collection is successful, so as to calculate the total power value at the rear end of the electric meter box.
Exemplarily, the metering and collecting module 300 may include a collector, which may be connected to each user electric meter in the electric meter box through an RS485 bus and collect the electric quantity parameters of each user electric meter in real time. Of course, in the actual operation process, if an electric meter collector is connected to the electric meter box, the electric quantity parameter of each user electric meter can be directly read by connecting the external interface of the line loss fine management device 10 to the electric meter collector.
Preferably, as shown in fig. 1, if there are many user electric meters, considering that the electric quantity parameters of all the user electric meters may not be collected at the same time due to network signal differences and other factors, the electric quantity parameters of each user electric meter may be collected for multiple times, and the real-time line loss or the line loss rate is calculated by using the electric quantity parameters of all the user electric meters collected at the same time, so that the accuracy of the calculated real-time line loss can be ensured. On the other hand, if one of the user electric meters is missed, the calculated line loss value will have a large error, which may cause a misjudgment situation.
After acquiring the voltage value and the current value acquired at the front end of the meter box and the electric quantity parameters of each user electric meter acquired in the meter box, the data processing module 400 calculates the real-time line loss and/or line loss rate, further determines whether the line loss and/or line loss rate exceeds a preset threshold value, and sends an alarm signal to the alarm module 500 to alarm when the line loss exceeds the preset threshold value.
Because there are many branch circuits on the low-voltage line, the line loss mainly refers to the power loss produced on each circuit, and the line loss value can be calculated by calculating the power loss. In this embodiment, the line loss is obtained by calculating a power difference between total power input at the front end of the electric meter box and total power output by each user electric meter in the electric meter box. Exemplarily, the data processing module 400 may calculate the line loss value according to the following steps:
(a) according to a voltage value U and a current value I collected at the front end of the electric meter box, calculating a power factor cos theta and a total power value P at the front end of the electric meter box, wherein the P is UIcos theta, and theta is a phase angle between voltage and current.
It should be understood that if the ammeter box is connected with three-phase power, the acquired phase voltage values of each phase are respectively U1、U2、U3The current value of each phase is I1、I2、I3(ii) a At this time, the total power P at the front end of the electric meter box is the sum of the powers of the phases, that is, the total power P at the front end of the electric meter box is ∑ UnIncosθnWherein n is 1, 2, 3, thetanThe phase angle between the phase voltage and the phase current of each phase is shown.
(b) Calculating the total power P2 of all the user electric meters according to the electric quantity parameters of each user electric meter collected in the electric meter box, wherein the electric quantity parameters comprise the current recorded voltage u, current i and power factor of each user electric meterAnd isAnd m is 1, 2, …, k and k is the number of the actually connected user meters.
(c) Further, the line loss rate can be calculated according to the line loss calculation formula △ P-P2, and according to the concept of the line loss rate, the line loss rate is the percentage of the power consumed by the line to the power supplied by the line, in this embodiment, the real-time line loss rate can be calculated by the calculated power loss △ P and the total power P input at the front end of the electricity meter box, that is, (△ P/P) < 100%.
Exemplarily, the user may select an empirical value as the preset line loss threshold or the line loss rate threshold according to the actual power condition. When the calculated line loss value or the calculated line loss rate exceeds the preset threshold, an alarm signal is sent to the alarm module 500. Preferably, the line loss rate threshold value can be set to be 2% -3% according to the actual experience value.
Illustratively, the data processing module 400 mainly includes a main controller, which may preferably be an ARM processor, such as an ARM7 series chip, an ARM9 series chip, and so on. The ARM processor has a powerful control processing function and has the characteristics of small size, low power consumption, low cost, high performance and the like. In addition, the ARM processor also supports a Thumb16 bit and ARM32 bit dual instruction set, can be well compatible with 8-bit/16-bit devices, uses a large number of registers, and has the characteristics of high instruction execution speed, high execution efficiency and the like.
Optionally, the data processing module 400 may further include a memory, where the memory is connected to the main controller, and may be configured to store relevant data, such as a voltage value and a current value of the front end of the electric meter box, an electric quantity parameter of each user electric meter in the electric meter box, and a line loss calculated by the main controller, which are collected in real time, so as to facilitate subsequent lookup and further analysis by a user. Of course, the data processing module 400 may also be implemented by a single chip microcomputer including an arithmetic unit, a data storage, and other components, such as an STM32 single chip microcomputer.
The alarm module 500 will alarm upon receiving an alarm signal sent by the main controller. Exemplarily, the alarm module 500 may include a buzzer and/or an indicator light.
Referring to fig. 4, optionally, the line loss fine management device 10 may further include a wireless communication module 600, where the wireless communication module 600 is connected to the data processing module 400, and may send the line loss data and the alarm signal calculated by the data processing module 400 to a remote terminal according to a command of the main controller, so as to implement remote monitoring, real-time alarm, and the like. Illustratively, the wireless communication module 600 may include, but is not limited to, one or more combinations of a GPRS module, a 4G module, a 3G module, a GSM module, and the like.
Considering that the line loss refinement management apparatus 10 may need to perform extension of the line loss management function with other devices, optionally, the line loss refinement management apparatus 10 may further include: a peripheral interface module 700, the peripheral interface module 700 being operable to connect other external devices to the data processing module 400 for functional expansion. Illustratively, the peripheral interface module 700 may include one or more combinations of 485 bus interfaces, USB interfaces, RS232 interfaces, RJ5 interfaces, and the like. In addition, the line loss refinement management device 10 may further include an expansion module such as an infrared communication module and a door contact.
The fine line loss management device provided by the embodiment is mainly installed at the incoming line end of each electric meter box, the real-time line loss value is obtained by calculating the power loss, the line loss threshold value is set to detect whether the current line loss exceeds the threshold value, and real-time on-site and/or remote automatic alarm is carried out when the current line loss exceeds the threshold value. The automatic line loss detection and analysis method not only realizes the automatic line loss detection and analysis, but also can remind a user of the abnormal line loss condition in time through remote alarm, thereby improving the timeliness of line loss management and solving the problem of hysteresis of the existing line loss management. In addition, the device can know the branch lines corresponding to the ammeter boxes to cause abnormal line loss through being installed at the ammeter boxes, and line loss statistics from the existing transformer area serving as a management unit to the branch lines of the ammeter boxes serving as the unit is achieved, so that the refinement degree of line loss management is further improved.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The sequence numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the implementation scenario. The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (10)
1. A line loss fine management apparatus, comprising: the device comprises a voltage acquisition module, a CT acquisition module, a metering acquisition module, a data processing module and an alarm module; the voltage acquisition module, the CT acquisition module, the metering acquisition module and the alarm module are all connected with the data processing module;
the voltage acquisition module and the CT acquisition module are arranged at the wire inlet end of the electric meter box and are respectively used for acquiring the voltage value and the current value of the front end of the electric meter box;
the metering acquisition module is connected with the user electric meters in the electric meter box and is used for acquiring electric quantity parameters of the user electric meters in the electric meter box;
the data processing module is used for calculating line loss or line loss rate according to the voltage value and the current value acquired at the front end of the electric meter box and the electric quantity parameter acquired in the electric meter box, judging whether the line loss or the line loss rate exceeds a preset threshold value and sending an alarm signal when the line loss or the line loss rate exceeds the preset threshold value;
and the alarm module is used for giving an alarm in real time according to the alarm signal.
2. The line loss refinement management device according to claim 1, further comprising: a wireless communication module,
the wireless communication module is connected with the data processing module and used for sending the line loss data obtained by calculation of the data processing module and the alarm signal to a remote terminal so as to realize remote monitoring and alarm.
3. The line loss refinement management device according to claim 1, wherein the voltage acquisition module comprises a voltage reduction circuit, a sampling circuit and a conversion circuit, the voltage reduction circuit, the sampling circuit and the conversion circuit are electrically connected in sequence, wherein,
the voltage reduction circuit is used for collecting input voltage of the electricity meter box inlet wire end and carrying out voltage reduction processing on the input voltage;
the sampling circuit is used for carrying out alternating current sampling on the voltage subjected to voltage reduction to obtain a sampling voltage;
the conversion circuit is used for converting the sampling voltage into a digital voltage and sending the digital voltage to the data processing module.
4. The line loss fine management device according to claim 1, wherein the CT acquisition module comprises at least one current transformer, and the current transformer is configured to acquire a current value at an incoming line end of the electric meter box and send the current value to the data processing module.
5. The line loss fine management device according to claim 1, wherein the metering and collecting module comprises a collector, and the collector is connected with each user electric meter in the electric meter box through an RS485 bus and collects electric quantity parameters of each user electric meter in real time.
6. The line loss refinement management device according to claim 1, wherein the alarm module comprises a buzzer and/or an indicator light.
7. The line loss refinement management device of claim 2, wherein the wireless communication module comprises: one or more of a GPRS module, a 4G module, a 3G module and a GSM module.
8. The line loss refinement management device according to claim 1, further comprising: the peripheral interface module comprises one or more combinations of 485 bus interfaces, USB interfaces, RS232 interfaces and RJ5 interfaces; wherein,
the peripheral interface module is used for connecting an external device to the data processing module to realize function expansion.
9. The line loss refinement management device according to claim 1, wherein the data processing module further comprises: a memory for storing a plurality of data to be transmitted,
the memory is used for storing the voltage value and the current value of the front end of the meter box, the electric quantity parameter of the rear end of the meter box and the line loss data obtained by calculation of the data processing module, which are acquired in real time.
10. The line loss refinement management device of claim 1, wherein the data processing module comprises a main controller, wherein the main controller is an ARM-series processor chip.
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| CN201821201924.8U CN208921783U (en) | 2018-07-26 | 2018-07-26 | Line loss fine-grained management device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802488A (en) * | 2018-07-26 | 2018-11-13 | 广东电网有限责任公司 | Line loss fine-grained management device and method |
| CN110927480A (en) * | 2019-11-02 | 2020-03-27 | 国网上海市电力公司 | Low-voltage transformer area loss reduction method for HPLC application environment |
| CN111721987A (en) * | 2020-06-01 | 2020-09-29 | 王沛 | Electric power thing networking batch meter equipment based on thing allies oneself with perception technique |
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2018
- 2018-07-26 CN CN201821201924.8U patent/CN208921783U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802488A (en) * | 2018-07-26 | 2018-11-13 | 广东电网有限责任公司 | Line loss fine-grained management device and method |
| CN110927480A (en) * | 2019-11-02 | 2020-03-27 | 国网上海市电力公司 | Low-voltage transformer area loss reduction method for HPLC application environment |
| CN110927480B (en) * | 2019-11-02 | 2022-06-21 | 国网上海市电力公司 | Low-voltage transformer area loss reduction method for HPLC application environment |
| CN111721987A (en) * | 2020-06-01 | 2020-09-29 | 王沛 | Electric power thing networking batch meter equipment based on thing allies oneself with perception technique |
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