CN109283880B - A method and system for judging that the difference of energy supply flow is too large - Google Patents
A method and system for judging that the difference of energy supply flow is too large Download PDFInfo
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Abstract
本发明公开了用于对供能流量差值过大进行判断的方法及系统，其中方法包括：对能源计量管理系统主站针对同一能源输送主线路的所有分支线路进行独立采集的任一次数据进行判断:当所述所有分支线路计量设备的供能流量值均大于0，并且不小于标准供能流量值的6倍时；计算各分支线路计量设备的供能流量的最大值和最小值的差，获取所述各分支线路计量设备的供能流量的最大值和最小值的差值，所述差值与所述各分支线路计量设备的供能流量的最大值的比值大于计量设备的阈值时；当所述所有分支线路计量设备的供能流量值均小于标准供能流量值的5％，或当所述所有分支线路计量设备的供能流量值均不小于标准供能流量值的0.5％时；则确定供能流量差值过大。
The invention discloses a method and a system for judging that the difference of energy supply flow is too large. Judgment: when the energy supply flow values of all the branch line metering devices are greater than 0, and not less than 6 times the standard energy supply flow value; calculate the difference between the maximum value and the minimum value of the energy supply flow rate of each branch line metering device , obtain the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, when the ratio of the difference to the maximum value of the energy supply flow of each branch line metering device is greater than the threshold value of the metering device ; When the energy supply flow value of all branch line metering equipment is less than 5% of the standard energy supply flow value, or when the energy supply flow value of all branch line metering equipment is not less than 0.5% of the standard energy supply flow value time; it is determined that the energy supply flow difference is too large.
Description
Technical Field
The invention relates to the technical field of energy metering, in particular to a method and a system for judging whether an energy supply flow difference is too large.
Background
The construction of an electricity, gas and heat energy metering management system is developed in China, and hundreds of thousands of users are covered in an accumulated manner. Along with the enlargement of the system scale, the operation and maintenance difficulty of the system and the equipment is greatly improved, in order to effectively reduce the operation and maintenance workload, accurately position the faults of the system and the equipment and reasonably analyze the energy utilization state of a user, equipment data are efficiently acquired based on an automatic acquisition means, corresponding conclusions are obtained through automatic analysis by a reasonable calculation method, and the on-site operation and maintenance work is supported.
The construction of the electricity, water, gas and heat energy metering management system refers to the construction experience of the electricity energy information acquisition and management system in nearly ten years, takes the electricity energy information acquisition technology for the electric energy meter as a core, simultaneously accesses and acquires the data of the water meter, the gas meter and the heat meter, integrates the data in a system main station, and realizes the convenience functions of multiple single functions and the like. Through years of construction and operation and maintenance, the electric energy information acquisition and management system accumulates a large amount of experience, the development of an intelligent measurement technology is powerfully promoted, the intelligent level of a power grid is improved, various acquired data play an important supporting role in a plurality of professional business applications such as power transaction, electric charge recovery, power utilization inspection, market demand side, line loss lean analysis, power distribution network operation monitoring, power supply quality monitoring and fault repair, and become an important basic data source. However, when the difference between the supply flows is too large, the data is inaccurate, and the correct metering of the data is affected.
Therefore, a technique is needed to determine whether the difference between the supply flows of the master station of the energy metering management system is too large.
Disclosure of Invention
The technical scheme of the invention provides a method and a system for judging whether the difference value of the energy supply flow is too large, so as to solve the problem of judging whether the difference value of the energy supply flow of a main station of an energy metering management system is too large.
In order to solve the above problem, the present invention provides a method for determining that an energy supply flow difference is too large, the method comprising:
judging any time data which are independently collected by the energy metering management system main station aiming at all branch lines of the same energy transmission main line:
when the energy supply flow values of all the branch line metering devices are greater than 0 and not less than 6 times of the standard energy supply flow value;
calculating the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, and acquiring the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, wherein the ratio of the difference to the maximum value of the energy supply flow of each branch line metering device is larger than the threshold value of the metering device;
when the energy supply flow values of all the branch line metering devices are less than 5% of the standard energy supply flow value, or when the energy supply flow values of all the branch line metering devices are not less than 0.5% of the standard energy supply flow value;
it is determined that the difference in the supply flow rates is too large.
Preferably, the metering apparatus comprises: electric energy meter, water gauge, gas meter and calorimeter.
Preferably, the energy supply flow value of the electric energy meter is calculated according to a current value, the standard energy supply flow value of the electric energy meter is calculated according to a rated current, and the threshold value of the electric energy meter is calculated according to 60%.
Preferably, the energy supply flow value of the water meter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the water meter to 86400 seconds, the standard energy supply flow value of the water meter is calculated according to the maximum flow of the water meter, and the threshold value of the water meter is calculated according to 80%.
Preferably, the energy supply flow value of the gas meter is calculated according to the ratio of the difference between the current daily value and the previous daily value of the forward total flow indication value of the gas meter to 86400 seconds, the standard energy supply flow value of the gas meter is calculated according to the maximum flow, and the threshold value of the gas meter is calculated according to 80%.
Preferably, the energy supply flow value of the heat meter is calculated according to the ratio of the difference between the current day value and the previous day value of the forward total flow indication value of the heat meter to 86400 seconds, the standard energy supply flow value of the heat meter is calculated according to the maximum flow of the heat meter, and the threshold value of the heat meter is calculated according to 90%.
Preferably, the metering device is monitored by the master station of the energy metering management system, when the difference value of the energy supply flow is monitored to be too large in each of 3 consecutive days, an event with the too large difference value of the energy supply flow is generated, and the level of the event with the too large difference value is determined to be the minimum value of the calculated ratio in 3 days.
Preferably, when multiple types of different metering devices of the same user generate an event with an excessive energy supply flow difference, a comprehensive event with an excessive energy supply flow difference of the user is generated, and the event grade is the sum of the product of the event grade with the excessive energy supply flow difference in each type of metering device and the type weight of the metering device.
Preferably, the weight of the electric energy meter is 1.8, the weight of the water meter is 1.2, the weight of the gas meter is 1.2, and the weight of the heat meter is 1.0.
According to another aspect of the present invention, there is provided a system for determining that an energy supply flow difference is too large, the system comprising:
the judging unit is used for judging any data which are independently acquired by the energy metering management system main station aiming at all branch lines of the same energy transmission main line:
the first judgment module is used for judging whether the energy supply flow values of all the branch line metering devices are greater than 0 and not less than 6 times of the standard energy supply flow value;
the second judgment module is used for calculating the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, and acquiring the difference value between the maximum value and the minimum value of the energy supply flow of each branch line metering device, wherein the ratio of the difference value to the maximum value of the energy supply flow of each branch line metering device is larger than the threshold value of the metering device;
the third judging module is used for judging whether the energy supply flow values of all the branch line metering devices are less than 5% of the standard energy supply flow value or not, or whether the energy supply flow values of all the branch line metering devices are not less than 0.5% of the standard energy supply flow value or not;
and the determining unit is used for determining that the difference value of the energy supply flow is too large.
Preferably, the metering apparatus comprises: electric energy meter, water gauge, gas meter and calorimeter.
Preferably, the energy supply flow value of the electric energy meter is calculated according to a current value, the standard energy supply flow value of the electric energy meter is calculated according to a rated current, and the threshold value of the electric energy meter is calculated according to 60%.
Preferably, the energy supply flow value of the water meter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the water meter to 86400 seconds, the standard energy supply flow value of the water meter is calculated according to the maximum flow of the water meter, and the threshold value of the water meter is calculated according to 80%.
Preferably, the energy supply flow value of the gas meter is calculated according to the ratio of the difference between the current daily value and the previous daily value of the forward total flow indication value of the gas meter to 86400 seconds, the standard energy supply flow value of the gas meter is calculated according to the maximum flow, and the threshold value of the gas meter is calculated according to 80%.
Preferably, the energy supply flow value of the heat meter is calculated according to the ratio of the difference between the current day value and the previous day value of the forward total flow indication value of the heat meter to 86400 seconds, the standard energy supply flow value of the heat meter is calculated according to the maximum flow of the heat meter, and the threshold value of the heat meter is calculated according to 90%.
Preferably, the determining unit is further configured to monitor the metering device by a master station of an energy metering management system, and when the difference between the energy supply flow rates is monitored to be too large on each of 3 consecutive days, an event with a too large difference between the energy supply flow rates is generated, and the level of the event with the too large difference is determined to be the minimum value of the calculated ratio in 3 days.
Preferably, the determining unit is further configured to, when multiple types of different metering devices of the same user generate an event with an excessive energy supply flow difference, generate an event with an excessive energy supply flow difference for the user, where the event level is a sum of a product of an event level with an excessive energy supply flow difference in each type of metering device and a weight of a type of the metering device.
Preferably, the weight of the electric energy meter is 1.8, the weight of the water meter is 1.2, the weight of the gas meter is 1.2, and the weight of the heat meter is 1.0.
The technical scheme of the invention provides a method for judging the overlarge difference value of energy supply flow, which comprises the following steps: judging any data which are independently collected by the energy metering management system main station aiming at all branch lines of the same energy transmission main line, wherein when the energy supply flow values of all branch line metering devices are all larger than 0 and not smaller than 6 times of the standard energy supply flow value; calculating the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, and acquiring the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, wherein the ratio of the difference to the maximum value of the energy supply flow of each branch line metering device is larger than the threshold value of the metering device; when the energy supply flow values of all the branch line metering devices are less than 5% of the standard energy supply flow value, or when the energy supply flow values of all the branch line metering devices are not less than 0.5% of the standard energy supply flow value; it is determined that the difference in the supply flow rates is too large. The invention provides an energy supply flow difference value oversize judgment algorithm based on energy metering management system main station data analysis, wherein the energy supply flow difference value oversize means that whether partial branch energy supply flow is overhigh or overlow to influence the working state and the working life of an energy supply line is analyzed according to the distribution condition of energy supply flow in all branch lines of an energy supply main line. The technical scheme is used for the electric, water, gas and heat energy metering management system, and is suitable for a system structure jointly constructed by a system main station, a collection device and a metering device.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a flow chart of a method for determining an excessive difference in energization flow rates according to a preferred embodiment of the present invention; and
fig. 2 is a diagram of a system for determining an excessive difference in the supply flows according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, 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 this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of a method for determining an excessive difference in energy supply flow rates according to a preferred embodiment of the present invention. This application is according to the distribution situation of energy supply flow in all branch circuits of energy transmission main line, and the analysis has partial branch road energy supply flow too high or low excessively, influences energy transmission line's operating condition and working life. The algorithm is used for an electricity, gas and heat energy metering management system, is suitable for a system structure which is jointly constructed by a system main station, acquisition equipment and metering equipment, acquires data of the metering equipment by the acquisition equipment, analyzes the data at the system main station, judges the state and event of overlarge energy supply flow difference, and can support the operation and maintenance work of the energy metering management system by an analysis result. As shown in fig. 1, a method for determining that a difference between supply flows is too large, the method includes:
preferably, in step 101: judging any time data which are independently collected by the energy metering management system main station aiming at all branch lines of the same energy transmission main line:
when the energy supply flow values of all branch line metering devices are greater than 0 and not less than 6 times of the standard energy supply flow value;
calculating the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, and acquiring the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, wherein the ratio of the difference to the maximum value of the energy supply flow of each branch line metering device is larger than the threshold value of the metering device;
when the energy supply flow values of all the branch line metering devices are less than 5% of the standard energy supply flow value, or when the energy supply flow values of all the branch line metering devices are not less than 0.5% of the standard energy supply flow value;
preferably, at step 102: it is determined that the difference in the supply flow rates is too large.
Preferably, the metering device comprises: electric energy meter, water gauge, gas meter and calorimeter.
Preferably, the energy supply flow value of the electric energy meter is calculated according to the current value, the standard energy supply flow value of the electric energy meter is calculated according to the rated current, and the threshold value of the electric energy meter is calculated according to 60%.
Preferably, the energy supply flow value of the water meter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the water meter to 86400 seconds, the standard energy supply flow value of the water meter is calculated according to the maximum flow of the water meter, and the threshold value of the water meter is calculated according to 80%.
Preferably, the energy supply flow value of the gas meter is calculated according to the ratio of the difference between the current day value and the previous day value of the forward total flow indication value of the gas meter to 86400 seconds, the standard energy supply flow value of the gas meter is calculated according to the maximum flow, and the threshold value of the gas meter is calculated according to 80%.
Preferably, the energy supply flow value of the heat meter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the heat meter to 86400 seconds, the standard energy supply flow value of the heat meter is calculated according to the maximum flow of the heat meter, and the threshold value of the heat meter is calculated according to 90%.
Preferably, the master station of the energy metering management system monitors the metering device, when an excessive difference in energy supply flow is monitored in each of 3 consecutive days, an event with an excessive difference in energy supply flow is generated, and the level of the event with the excessive difference is determined to be the minimum value of the calculated ratio in 3 days.
Preferably, when multiple types of different metering devices of the same user generate an event with an excessive energy supply flow difference, a comprehensive event with an excessive energy supply flow difference of the user is generated, and the event grade is the sum of the product of the event grade with the excessive energy supply flow difference in each type of metering device and the type weight of the metering device.
Preferably, the weight of the electric energy meter is 1.8, the weight of the water meter is 1.2, the weight of the gas meter is 1.2, and the weight of the heat meter is 1.0.
The invention provides an energy supply flow difference value oversize judgment algorithm based on energy metering management system master station data analysis, which is characterized by comprising the following steps: in any data block which is independently acquired by a main station of the energy metering management system aiming at all branch lines of the same energy transmission main line, the following conditions are met, namely that the data block is in a state of overlarge energy supply flow difference:
(1) the energy supply flow value of each branch line is greater than 0 and is less than 6 times of the standard energy supply flow value;
(2) calculating the difference value between the maximum value and the minimum value of the energy supply flow of each branch line, wherein the ratio of the difference value to the maximum value of the energy supply flow of each branch line is greater than a threshold value;
(3) the energy supply flow value of each branch line is less than 5% of the standard energy supply flow value, or the energy supply flow value of each branch line is not less than 0.5% of the standard energy supply flow value;
the metering equipment is divided into 4 types, including electric energy meters, water meters, gas meters and heat meters. The energy supply flow value of the electric energy meter is calculated according to the current value, the standard energy supply flow value is calculated according to the rated current, and the threshold value is calculated according to 60%; the energy supply flow value of the water meter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the water meter to 86400 seconds, the standard energy supply flow value is calculated according to the maximum flow, and the threshold value is calculated according to 80%; the energy supply flow value of the gas meter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the gas meter to 86400 seconds, the standard energy supply flow value is calculated according to the maximum flow, and the threshold value is calculated according to 80%; the energy supply flow value of the heat meter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the heat meter to 86400 seconds, the standard energy supply flow value is calculated according to the maximum flow, and the limited threshold value is calculated according to 90%.
Monitoring the metering equipment at the energy metering management system main station, if the state of an overlarge energy supply flow difference value is monitored in each day of 3 continuous days, and the metering equipment monitored every time is the same, generating an event of the overlarge energy supply flow difference value, wherein the event grade is the minimum value of the calculated ratio in 3 days. If the different metering devices of the same user generate the event with the overlarge energy supply flow difference value, the event with the overlarge comprehensive energy supply flow difference value of the user is generated, the event grade is the sum of the product of the event grade with the overlarge energy supply flow difference value in each type of metering device and the type weight of the metering device, wherein the weight of the electric energy meter is 1.8, the weight of the water meter is 1.2, the weight of the gas meter is 1.2, and the weight of the heat meter is 1.0.
Fig. 2 is a diagram of a system for determining an excessive difference in the supply flows according to a preferred embodiment of the present invention. As shown in fig. 2, a system for determining that a difference between supply flows is too large, the system comprising:
a judging unit 201, configured to judge any data that is independently collected by the master station of the energy metering management system for all branch lines of the same energy delivery main line:
the first judgment module is used for judging whether the energy supply flow values of all the branch line metering devices are greater than 0 and not less than 6 times of the standard energy supply flow value;
the second judgment module is used for calculating the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, acquiring the difference value between the maximum value and the minimum value of the energy supply flow of each branch line metering device, and when the ratio of the difference value to the maximum value of the energy supply flow of each branch line metering device is greater than the threshold value of the metering device;
the third judging module is used for judging whether the energy supply flow values of all the branch line metering devices are less than 5% of the standard energy supply flow value or not, or whether the energy supply flow values of all the branch line metering devices are not less than 0.5% of the standard energy supply flow value or not;
and the determining unit 202 is used for determining that the difference value of the energy supply flow rates is too large.
Preferably, the metering device comprises: electric energy meter, water gauge, gas meter and calorimeter.
Preferably, the energy supply flow value of the electric energy meter is calculated according to the current value, the standard energy supply flow value of the electric energy meter is calculated according to the rated current, and the threshold value of the electric energy meter is calculated according to 60%.
Preferably, the energy supply flow value of the water meter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the water meter to 86400 seconds, the standard energy supply flow value of the water meter is calculated according to the maximum flow of the water meter, and the threshold value of the water meter is calculated according to 80%.
Preferably, the energy supply flow value of the gas meter is calculated according to the ratio of the difference between the current day value and the previous day value of the forward total flow indication value of the gas meter to 86400 seconds, the standard energy supply flow value of the gas meter is calculated according to the maximum flow, and the threshold value of the gas meter is calculated according to 80%.
Preferably, the energy supply flow value of the heat meter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the heat meter to 86400 seconds, the standard energy supply flow value of the heat meter is calculated according to the maximum flow of the heat meter, and the threshold value of the heat meter is calculated according to 90%.
Preferably, the determining unit is further configured to monitor the metering device by the energy metering management system master station, and when an excessive difference in the energy supply flow is monitored on each of 3 consecutive days, an event with an excessive difference in the energy supply flow is generated, and the level of the event with the excessive difference is determined to be the minimum value of the calculated ratio in 3 days.
Preferably, the determining unit is further configured to 202, when multiple types of different metering devices of the same user generate an event with an excessive energy supply flow difference, generate an event with an excessive energy supply flow difference for the user, where the event level is the sum of the product of the event level with the excessive energy supply flow difference in each type of metering device and the type weight of the metering device.
Preferably, the weight of the electric energy meter is 1.8, the weight of the water meter is 1.2, the weight of the gas meter is 1.2, and the weight of the heat meter is 1.0.
The system 200 for determining that the difference between the supply flow rates is too large in the preferred embodiment of the present invention corresponds to the method 100 for determining that the difference between the supply flow rates is too large in the preferred embodiment of the present invention, and therefore, no further description is provided here.
The invention has been described with reference to a few embodiments. However, other examples than the ones disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a// the [ device, component, etc ]" are to be interpreted openly as at least one instance of a device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (16)
1. A method for determining that an energy supply flow difference is excessive, the method comprising:
judging any time data which are independently collected by the energy metering management system main station aiming at all branch lines of the same energy transmission main line:
when the energy supply flow values of all the branch line metering devices are greater than 0 and not less than 6 times of the standard energy supply flow value; the metering apparatus comprises: electric energy meter, water meter, gas meter and heat meter;
and calculating the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, and acquiring the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, wherein when the ratio of the difference to the maximum value of the energy supply flow of each branch line metering device is greater than the threshold value of the metering device, the energy supply flow difference is determined to be overlarge.
2. The method of claim 1, wherein the energy supply flow value of the electric energy meter is calculated as a current value, the standard energy supply flow value of the electric energy meter is calculated as a rated current, and the threshold value of the electric energy meter is calculated as 60%.
3. The method of claim 1, wherein said water meter energy flow value is calculated as a ratio of a difference between a current day value and a previous day value of a total forward flow indication of said water meter to 86400 seconds, said water meter standard energy flow value is calculated as a maximum flow of said water meter, and said water meter threshold value is calculated as 80%.
4. The method of claim 1, wherein the energy supply flow value of the gas meter is calculated according to the ratio of the difference between the current day value and the previous day value of the forward total flow indication value of the gas meter to 86400 seconds, the standard energy supply flow value of the gas meter is calculated according to the maximum flow, and the threshold value of the gas meter is calculated according to 80%.
5. The method as claimed in claim 1, wherein the energy supply flow value of the calorimeter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the calorimeter to 86400 seconds, the standard energy supply flow value of the calorimeter is calculated according to the maximum flow of the calorimeter, and the threshold value of the calorimeter is calculated according to 90%.
6. The method of claim 1, wherein the metering device is monitored by a master energy metering management system station, and when an excessive difference in the supply flow rate is monitored on each of 3 consecutive days, an event of an excessive difference in the supply flow rate is generated, and the event of the excessive difference is ranked as the minimum value of the calculated ratios on 3 days.
7. The method of claim 6, wherein when multiple different metering devices of the same user generate an event with an excessive difference in energy supply flow rate, generating a comprehensive event with an excessive difference in energy supply flow rate for the user, wherein the event level is the sum of the product of the event level with an excessive difference in energy supply flow rate in each metering device and the type weight of the metering device.
8. The method of claim 7, wherein the weight of the electric energy meter is 1.8, the weight of the water meter is 1.2, the weight of the gas meter is 1.2, and the weight of the heat meter is 1.0.
9. A system for determining that an energy supply flow difference is excessive, the system comprising:
the judging unit is used for judging any data which are independently acquired by the energy metering management system main station aiming at all branch lines of the same energy transmission main line:
the first judgment module is used for judging whether the energy supply flow values of all the branch line metering devices are greater than 0 and not less than 6 times of the standard energy supply flow value; the metering apparatus comprises: electric energy meter, water meter, gas meter and heat meter;
and the second judging module is used for calculating the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, acquiring the difference between the maximum value and the minimum value of the energy supply flow of each branch line metering device, and determining that the energy supply flow difference is overlarge when the ratio of the difference to the maximum value of the energy supply flow of each branch line metering device is greater than the threshold value of the metering device.
10. The system of claim 9, wherein the power flow value of the power meter is calculated as a current value, the standard power flow value of the power meter is calculated as a rated current, and the threshold value of the power meter is calculated as 60%.
11. The system of claim 9, wherein said water meter energy flow value is calculated as a ratio of a difference between a current day value and a previous day value of a total forward flow indication of said water meter to 86400 seconds, said water meter standard energy flow value is calculated as a maximum flow of said water meter, and said water meter threshold value is calculated as 80%.
12. The system of claim 9, wherein the energy supply flow rate value of the gas meter is calculated according to the ratio of the difference between the current day value and the previous day value of the forward total flow indication value of the gas meter to 86400 seconds, the standard energy supply flow rate value of the gas meter is calculated according to the maximum flow rate, and the threshold value of the gas meter is calculated according to 80%.
13. The system of claim 9, wherein the energy supply flow value of the calorimeter is calculated according to the ratio of the difference between the current day value and the last day value of the forward total flow indication value of the calorimeter to 86400 seconds, the standard energy supply flow value of the calorimeter is calculated according to the maximum flow of the calorimeter, and the threshold value of the calorimeter is calculated according to 90%.
14. The system of claim 9, further comprising a determination unit, wherein the determination unit is further configured to monitor the metering device by an energy metering management system master station, and when the difference between the supply flows is monitored to be too large on each of 3 consecutive days, an event with a too large supply flow difference is generated, and the difference event is ranked as the minimum value of the calculated ratio in 3 days.
15. The system of claim 14, wherein the determining unit is further configured to, when multiple types of different metering devices of the same user generate an event with an excessive energy supply flow difference, generate a comprehensive event with an excessive energy supply flow difference for the user, and the event level is the sum of the product of the event level with the excessive energy supply flow difference in each type of metering device and the type weight of the metering device.
16. The system of claim 15, wherein the electric energy meter has a weight of 1.8, the water meter has a weight of 1.2, the gas meter has a weight of 1.2, and the heat meter has a weight of 1.0.
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