CN115037049A - Early warning method and device and power supply and utilization system - Google Patents
Early warning method and device and power supply and utilization system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- G—PHYSICS
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- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B31/00—Predictive alarm systems characterised by extrapolation or other computation using updated historic data
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention discloses an early warning method, an early warning device and a power supply and power supply system. Wherein, the method comprises the following steps: collecting the electric quantity of each line node in the power supply and consumption system in real time; calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel connection relation of each line node; and carrying out early warning according to the electric energy loss parameter value. According to the invention, the state and the state change trend of the power supply and consumption system can be sensed by monitoring the electric energy loss of the line of the power supply and consumption system in real time on line, and the advanced prejudgment and analysis are carried out, so that faults and dangers are found in advance, the occurrence of power supply and consumption accidents is avoided and actively prevented in advance, the active safety protection of the power supply and consumption system is realized, and the stability of the power supply and consumption system is ensured.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to an early warning method, an early warning device and a power supply and power supply system.
Background
The industrial production process has the characteristics of planning and continuity, so that the important significance of ensuring the stable and safe electric power of a factory is achieved. The factory power guarantee department makes great efforts for this purpose, such as duty patrol, temperature measurement and maintenance, but due to the complexity and particularity of the power transmission process, the traditional method is used as a passive safety protection mode, not only has low efficiency, but also can not completely meet the urgent needs of finding and preventing accidents in advance. Such as corrosion, aging and looseness of a line cable joint, corrosion and aging of a load switch contact, insulation damage of electric appliances and elements and the like, the slow development and change of the system states cannot be found in time, and the potential safety hazard caused by the slow development and change of the system states is serious.
Aiming at the problem that accidents cannot be found and prevented in advance because a passive safety protection mode is adopted by a power supply and utilization system in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides an early warning method, an early warning device and a power supply and utilization system, and at least solves the problem that accidents cannot be found and prevented in advance because the power supply and utilization system in the prior art adopts a passive safety protection mode.
In order to solve the above technical problem, an embodiment of the present invention provides an early warning method, including:
collecting the electric quantity of each line node in the power supply and consumption system in real time;
calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel connection relation of each line node;
and carrying out early warning according to the electric energy loss parameter value.
Optionally, calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel relation of each line node, including:
determining a main path node and a branch path node according to the series-parallel relation of each line node;
calculating the electric energy loss parameter value of each line according to the electric quantity of the main path node and the electric quantity of the branch path node;
wherein the electric energy loss parameter values of each line include: the apportioned loss electric energy value of each line and/or the apportioned loss proportion value of each line.
Optionally, the apportioned loss electric energy value of each line is calculated by using the following formula:
PSAi＝[E1-(E2+E3+…+En)]×Ei/(E2+E3+…+En)，
PSAi represents the sharing loss electric energy value of the ith line, i is more than or equal to 1 and less than or equal to n, n represents the number of the lines, Ei represents the electric quantity of the ith line node, E1 represents the electric quantity of the main path node, E2-En represent the electric quantity of each branch node, and the branch nodes are connected in parallel and are all connected to the main path node.
Optionally, calculating an apportioned loss ratio value of each line includes: and calculating the ratio of the apportioned loss electric energy value of the line to the electric quantity of the line node aiming at each line to obtain the apportioned loss proportion value of the line.
Optionally, the electric energy loss parameter values of each line include: the apportionment loss electric energy value of each line and/or the apportionment loss proportion value of each line;
carrying out early warning according to the electric energy loss parameter value, comprising the following steps:
acquiring a corresponding apportioned loss electric energy threshold value of each line under the current operation condition, and outputting early warning information if the apportioned loss electric energy value of the line is greater than the apportioned loss electric energy threshold value within continuous preset time or continuous preset times; and/or the presence of a gas in the gas,
and aiming at each line, acquiring a corresponding apportionment loss proportion threshold value of the line under the current operation condition, and outputting early warning information if the apportionment loss proportion value of the line is greater than the apportionment loss proportion threshold value within continuous preset time or continuous preset times.
Optionally, outputting the warning information includes: and sending the early warning information to a user terminal.
Optionally, each line node in the power supply and power supply system is provided with a sub-module correspondingly;
the method for acquiring the electric quantity of each line node in the power supply and consumption system in real time comprises the following steps:
simultaneously sending a period starting signal to each submodule so that each submodule is started to start to collect the electric quantity of the corresponding line node after receiving the period starting signal simultaneously;
when the preset period is over, simultaneously sending a period over signal to each submodule, so that each submodule simultaneously stops the acquisition action of the submodule after receiving the period over signal;
and receiving the electric quantity which is uploaded by each submodule and is collected in the current preset period.
Optionally, after calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel connection relationship of each line node, the method further includes: and storing the collected electric quantity and the calculated electric energy loss parameter values of each line to a local place and/or transmitting the electric energy loss parameter values to a cloud server.
Optionally, after calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel connection relationship of each line node, the method further includes: and constructing a state change trend graph of the power supply and consumption system according to the operating conditions and the stored electric energy loss parameter values of each line, and displaying the state change trend graph.
An embodiment of the present invention further provides an early warning apparatus, including:
the acquisition module is used for acquiring the electric quantity of each line node in the power supply and consumption system in real time;
the calculation module is used for calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel connection relation of each line node;
and the early warning module is used for early warning according to the electric energy loss parameter value.
The embodiment of the invention also provides a power supply and utilization system, which comprises: the embodiment of the invention provides an early warning device.
Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the method according to the embodiments of the present invention.
By applying the technical scheme of the invention, the electric quantity of each line node in the power supply and consumption system is acquired in real time, the electric energy loss parameter value of each line is calculated in real time according to the acquired electric quantity and the series-parallel connection relation of each line node, and early warning is carried out according to the electric energy loss parameter value. By monitoring the electric energy loss of the line of the power supply and consumption system in real time on line, the state and the state change trend of the power supply and consumption system can be sensed, the advance prejudgment and analysis are carried out, the fault and the danger are found in advance, the occurrence of power supply and consumption accidents is avoided and actively prevented in advance, the active safety protection of the power supply and consumption system is realized, and the stability of the power supply and consumption system is guaranteed.
Drawings
Fig. 1 is a flowchart of an early warning method according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a power supply and power supply system according to a second embodiment of the present invention;
fig. 3 is a block diagram of a main module according to a second embodiment of the present invention;
fig. 4 is a block diagram of a sub-module according to a second embodiment of the present invention;
fig. 5 is a specific flowchart of an early warning method according to a second embodiment of the present invention;
fig. 6 is a block diagram of a warning device according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention and the accompanying drawings are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Example one
The embodiment provides an early warning method which is applicable to a power supply and power supply system and capable of finding faults of the power supply and power supply system in advance. Fig. 1 is a flowchart of an early warning method according to an embodiment of the present invention, and as shown in fig. 1, the method includes the following steps:
and S101, acquiring the electric quantity of each line node in the power supply and consumption system in real time.
And S102, calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel connection relation of each line node.
And S103, early warning is carried out according to the electric energy loss parameter value.
The power supply and utilization system comprises at least one line, each line corresponds to a line node, and the line nodes refer to devices on the lines, such as power supply devices and power utilization devices. The electric quantity of the line node can be directly acquired through the acquisition device, and can also be calculated through acquired parameters such as voltage and current.
In the power supply and utilization system, a series-parallel relationship exists between the line nodes, for example, the total power supply device is connected with at least one electric device, and the electric devices are connected in parallel, the line on which the total power supply device is located may be referred to as a main line, and the line on which the electric device is located may be referred to as a branch line. The line has a certain electric energy loss. And the electric energy loss parameter value of the line is used for representing the electric energy loss condition of the line.
The early warning method of the embodiment collects the electric quantity of each line node in the power supply and consumption system in real time, calculates the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel connection relation of each line node, and carries out early warning according to the electric energy loss parameter value. The state and the state change trend of the power supply and power system can be sensed by monitoring the electric energy loss of the line of the power supply and power system in real time on line, the advanced prejudgment and analysis are carried out, faults and dangers are found in advance, the occurrence of power supply and utilization accidents is avoided and actively prevented in advance, the active safety protection of the power supply and power system is realized, and the stability of the power supply and power system is guaranteed. And the electric energy loss parameter value of each line can be accurately calculated in real time according to the electric quantity of each line node and the series-parallel connection relation of each line node.
In one embodiment, calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel relation of each line node includes: determining a main path node and a branch path node according to the series-parallel relation of each line node; calculating the electric energy loss parameter value of each line according to the electric quantity of the main path node and the electric quantity of the branch path node; wherein, the electric energy loss parameter value of each circuit includes: the apportioned loss electric energy value of each line and/or the apportioned loss proportion value of each line.
And all the branch nodes are connected in parallel and are connected to the main path node. The distributed loss electric energy value of the line is a loss value distributed by the line and is an absolute value. The line apportionment loss proportion value is the proportion of the line apportionment loss value in the self electric quantity and is a relative proportion value.
The embodiment can quickly and reliably determine the electric energy loss parameter value of each line based on the series-parallel connection relation and the electric quantity of the main path node and the branch path node. And the electric energy loss condition of the line is expressed by using the apportioned loss electric energy value and/or the apportioned loss proportion value of the line, so that the method is flexible.
Specifically, the apportioned loss electric energy value of each line can be calculated by adopting the following formula:
PSAi＝[E1-(E2+E3+…+En)]×Ei/(E2+E3+…+En)，
PSAi represents the apportionment loss electric energy value of the ith line, i is more than or equal to 1 and less than or equal to n, n represents the number of the lines, Ei represents the electric quantity of the ith line node, the line nodes comprise main line nodes and branch line nodes, E1 represents the electric quantity of the main line nodes, E2-En represent the electric quantity of each branch line node, and each branch line node is connected in parallel and is connected to the main line node. E1- (E2+ E3+ … + En) represents the total power loss.
By the formula, the apportioned loss electric energy value of each line can be calculated quickly and reliably.
Specifically, calculating the apportioned loss ratio value of each line includes: and calculating the ratio of the apportioned loss electric energy value of the line to the electric quantity of the line node aiming at each line to obtain the apportioned loss proportion value of the line. That is, PSRi is PSAi/Ei, and PSRi represents the distributed loss ratio value of the ith line. By the formula, the apportioned loss proportion value of each line can be calculated quickly and reliably.
In one embodiment, the power loss parameter values for each line include: the apportioned loss electric energy value of each line and/or the apportioned loss proportion value of each line. Correspondingly, carry out the early warning according to the electric energy loss parameter value, include: acquiring a corresponding apportioned loss electric energy threshold value of each line under the current operation condition, and outputting early warning information if the apportioned loss electric energy value of the line is greater than the apportioned loss electric energy threshold value within continuous preset time or continuous preset times; and/or acquiring a corresponding apportionment loss proportion threshold value of each line under the current operation condition, and outputting early warning information if the apportionment loss proportion value of the line is greater than the apportionment loss proportion threshold value within continuous preset time or continuous preset times.
Wherein, the operating condition refers to the condition that the line loses the electric energy, including: temperature conditions, load carrying state, line length conditions, etc. of the line design. Reasonable line loss (namely an apportioned loss electric energy threshold value and/or an apportioned loss proportion threshold value) corresponding to each line in the power supply and consumption system under different operating conditions can be set in advance through experiments, and the corresponding relation is used as the basis of early warning. The preset time and the preset times can be set according to actual conditions.
And/or the apportionment loss ratio value of the line is larger than the corresponding apportionment loss ratio threshold value, which indicates that the electric energy loss of the line is too large and the abnormality occurs. The early warning information is used for prompting that the electric energy loss of the line is abnormal.
For example, for a line a, based on the preset corresponding relationship, obtaining an apportioned loss electric energy threshold corresponding to the line a under the current operating condition, then comparing the calculated apportioned loss electric energy value of the line a with the obtained apportioned loss electric energy threshold, if the apportioned loss electric energy value of the line a is greater than the apportioned loss electric energy threshold for a continuous preset time or a continuous preset number of times, it indicates that the electric energy loss of the line a is abnormal, and outputting the warning information.
The implementation mode can timely carry out early warning and actively prevent accidents.
In one embodiment, outputting the warning information includes: and sending the early warning information to the user terminal. This embodiment can in time inform managers with the early warning.
Considering that the power transmission speed is extremely high and almost instantaneous transmission is realized, and simultaneously, due to numerous influence factors such as source-load-lines and the like, the real-time performance of the change and fluctuation of parameter values of power parameters such as the sine wave characteristics of current and voltage is very high and almost reaches nanosecond level, so that the difficulty of accurately acquiring and simultaneously acquiring system parameters is very high, and great difficulty is brought to the accuracy of data analysis.
In order to solve the above problem, in an embodiment, each line node in the power supply and consumption system is provided with a sub-module, and the sub-module is used for collecting the electric quantity of the corresponding line node. The method for acquiring the electric quantity of each line node in the power supply and consumption system in real time comprises the following steps: simultaneously sending a period starting signal to each submodule so that each submodule is started to start to collect the electric quantity of the corresponding line node after receiving the period starting signal simultaneously; when the preset period is over, simultaneously sending a period over signal to each submodule, so that each submodule simultaneously stops the acquisition action of the submodule after receiving the period over signal; and receiving the electric quantity which is uploaded by each submodule and is collected in the current preset period.
The preset period refers to a data sampling period, and can be set according to actual requirements.
According to the embodiment, the period starting signal and the period ending signal are simultaneously sent to each submodule, so that the time period for each submodule to collect the electric quantity is consistent, the time delay is eliminated, and the purpose of simultaneously collecting the electric quantity of the line node of the power supply and power system in real time is achieved.
In one embodiment, after calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel relationship of each line node, the method further includes: and storing the collected electric quantity and the calculated electric energy loss parameter value of each line to a local place and/or transmitting the electric energy loss parameter value to a cloud server. The embodiment stores the collected electric quantity and the calculated electric energy loss parameter values of each line, and the electric energy loss parameter values are used as historical data of the power supply and power supply system, so that analysis, tracing and query are facilitated.
The corresponding apportioned loss power threshold and/or apportioned loss proportion threshold may also be modified based on historical data as the power supply and consumption system is operated.
In one embodiment, after calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel relationship of each line node, the method further includes: and constructing a state change trend graph of the power supply and power supply system according to the operating conditions and the stored electric energy loss parameter values of each line, and displaying the state change trend graph.
According to the power supply and utilization system operation process historical data, an electric energy loss parameter distribution curve can be formed, the curve can reflect the real-time operation state and the state change trend of the power supply and utilization system, the state change trend graph enables the electric energy loss condition of the power supply and utilization system to be transparent, and managers can conveniently observe and know the state change condition of the power supply and utilization system in time, so that the power supply and utilization system can be maintained in advance, and the power supply and utilization system can not be maintained after a fault (such as power failure protection) occurs.
Example two
The above-mentioned warning method is described below with reference to a specific embodiment, but it should be noted that the specific embodiment is only for better describing the present application and is not to be construed as a limitation of the present application. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.
As shown in fig. 2, a schematic diagram is provided for the lines of the power supply and consumption system, where the power supply and consumption system includes n lines, specifically: one main branch and n-1 tributaries. And correspondingly arranging submodules marked as S1-Sn on each line. A main module M is also provided which can communicate with all the sub-modules. The main module may exist alone or may be embedded in any sub-module, that is, the function of the main module may be implemented by any sub-module. The sub-modules can be embedded or integrated into the equipment, so that omnibearing monitoring and acquisition are realized.
As shown in fig. 3, a block diagram of a main module is shown, and the main module includes: a central control unit 11, a data analysis unit 12, a data storage unit 13 and a first signal transceiving unit 14. The central control unit 11 is used for issuing a start instruction and an end instruction of a data sampling period to perform timing control. The data analysis unit 12 is used for calculating and judging the collected data of the plurality of sub-module data and the historical data. The data storage unit 13 is configured to store the calculated distributed power consumption value of each line. The first signal transceiver unit 14 is used for data transmission with the second signal transceiver unit 23 of the sub-module.
As shown in fig. 4, it is a block diagram of a sub-module, and the sub-module includes: the sub-module control unit 21, the electric energy acquisition unit 22 and the second signal transceiving unit 23. The sub-module control unit 21 is used to perform timing control of the sub-modules. The electric energy collection unit 22 is used for collecting and metering the electric energy information of the line node where the sub-module is located. The second signal transceiver unit 23 is used for data transmission with the first signal transceiver unit 14 of the main module.
The first signal transceiver unit 14 and the second signal transceiver unit 23 may use a wired communication method, for example, a CAN bus or an RS-485 bus, and after the main module sends the cycle start signal and the cycle end signal, each sub-module receives the signals at the same time and immediately executes the action corresponding to the signals. The first signal transceiver unit 14 and the second signal transceiver unit 23 may also adopt a wireless transmission method, for example, a wireless rf digital signal of a cycle start and a cycle end is transmitted by LoRa, and each sub-module receives the signal at the same time and immediately executes an operation corresponding to the signal. Therefore, the time periods of electric quantity collection of the submodules are consistent, and the purpose of simultaneously sampling the electric energy parameters of the line nodes of the power supply and consumption system is achieved. The data collected by each sub-module can be respectively sent to the main module in an asynchronous mode, namely, the data collected by each sub-module at the same time is only ensured, and the collected data is not required to be fed back to the main module at the same time by each sub-module.
As shown in fig. 5, the early warning method for the power supply and power consumption system includes the following steps:
and S501, powering on and starting.
S502, the central control unit 11 of the main module sends a digital signal of "cycle start" through the first signal transceiving unit 14.
S503, the sub-module control units 21 of the sub-modules receive the cycle start signal through the respective second signal transceiving units 23, and start the electric energy collecting unit 22 of the sub-module to start collecting the electric energy information.
S504, when the preset period T is over, the central control unit 11 of the main module sends a digital signal of "period over" through the first signal transceiver unit 14.
And S505, the sub-module control units 21 of the sub-modules simultaneously receive the cycle end signal through the respective second signal transceiving units 23, and simultaneously stop the collecting action of the electric energy collecting unit 22 of the sub-module, so as to obtain the electric quantities E1-En collected by the sub-modules in the cycle. The main module is communicated with the second signal transceiving units 23 of the sub-modules through the first signal transceiving units 14, and the electric quantity collected by the sub-modules is fed back to the data analysis unit 12 of the main module.
S506, the data analysis unit 12 of the master module calculates the apportioned loss electric energy value PSAi (absolute value) and/or the apportioned loss proportion value PSRi (relative proportion value) of the corresponding line according to the electric quantity fed back by each sub-module and the series and parallel relations of the line nodes corresponding to each sub-module.
The calculation formula is as follows:
PSAi＝[E1-(E2+E3+…+En)]×Ei/(E2+E3+…+En)，
PSRi＝PSAi/Ei，
PSAi represents the apportionment loss electric energy value of the ith line, PSRi represents the apportionment loss proportion value of the ith line, i is more than or equal to 1 and less than or equal to n, n represents the number of the lines (also equal to the number of sub-modules), Ei represents the electric quantity of the ith line node, the line nodes comprise main path nodes and branch path nodes, E1 represents the electric quantity of the main path nodes, E2-En represents the electric quantity of each branch path node, and each branch path node is connected in parallel and is connected to the main path nodes. E1- (E2+ E3+ … + En) represents the total power loss.
The data storage unit 13 of the master module correspondingly stores the real-time sampled data and the PSAi and/or PSRi calculated by the data analysis unit 12 as historical data.
S507, the data analysis unit 12 of the master module determines the apportioned loss power threshold and/or the apportioned loss ratio threshold corresponding to each line under the current operating condition, and determines whether the PSAi is greater than the PSAi0 and/or the PSRi is greater than the PSRi0 for each line, respectively. If so, the process proceeds to S508, and if not, the process proceeds to S509. PSAi0 represents the apportioned loss power threshold for the ith line, and PSRi0 represents the apportioned loss proportion threshold for the ith line.
And S508, judging that the line is about to be dangerous, and prompting early warning of faults so that workers can timely handle the faults.
And S509, ending.
Since the failure of the power supply and utilization system is always accompanied by the loss of energy, such as the increase of resistance caused by poor contact, the generation of heat, the arc discharge caused by insulation damage, and the like, there is a process in which the state of the system itself changes. It is also found in practice that the occurrence of an anomaly always occurs under certain load conditions of the system operation, such as when the system is heavily loaded. Meanwhile, the system has stronger coupling and real-time change of load current, voltage and power, so that the system has higher complexity. According to real-time line energy loss, the safety state and the state change trend of the system can be judged, the electric situation is sensed, accidents are avoided and prevented in advance, and active safety protection of the power supply and power system is achieved.
EXAMPLE III
Based on the same inventive concept, the embodiment provides an early warning device, which can be used for implementing the early warning method described in the above embodiment. The early warning device can be realized by software and/or hardware.
Fig. 6 is a block diagram of a structure of an early warning apparatus provided in a third embodiment of the present invention, and as shown in fig. 6, the early warning apparatus includes:
an acquisition module 601 (equivalent to the electric energy acquisition unit 22 in the second embodiment) configured to acquire the electric quantity of each line node in the power supply and consumption system in real time;
a calculating module 602 (equivalent to the data analyzing unit 12 in the second embodiment) configured to calculate an electric energy loss parameter value of each line in real time according to the collected electric quantity and a series-parallel relationship between nodes of each line;
the early warning module 603 (which is equivalent to the data analysis unit 12 in the second embodiment) is configured to perform early warning according to the electric energy loss parameter value.
Optionally, the calculating module 602 includes:
the determining unit is used for determining a main path node and a branch path node according to the series-parallel connection relation of each line node;
the calculating unit is used for calculating the electric energy loss parameter value of each line according to the electric quantity of the main path node and the electric quantity of the branch path node; wherein the electric energy loss parameter values of each line include: the apportioned loss electric energy value of each line and/or the apportioned loss proportion value of each line.
Optionally, the calculating unit calculates the apportioned loss electric energy value of each line by using the following formula:
PSAi＝[E1-(E2+E3+…+En)]×Ei/(E2+E3+…+En)，
PSAi represents the distributed loss electric energy value of the ith line, i is more than or equal to 1 and less than or equal to n, n represents the number of the lines, Ei represents the electric quantity of the ith line node, E1 represents the electric quantity of the main path node, E2-En represent the electric quantity of each branch node, and the branch nodes are connected in parallel and are all connected to the main path node.
Optionally, the computing unit is specifically configured to: and calculating the ratio of the apportioned loss electric energy value of the line to the electric quantity of the line node aiming at each line to obtain the apportioned loss proportion value of the line.
Optionally, the electric energy loss parameter values of each line include: the apportioned loss electric energy value of each line and/or the apportioned loss proportion value of each line. The early warning module 603 includes:
the first early warning unit is used for acquiring a corresponding apportioned loss electric energy threshold value of each line under the current operation condition, and outputting early warning information if the apportioned loss electric energy value of the line is greater than the apportioned loss electric energy threshold value within continuous preset time or for continuous preset times; and/or the presence of a gas in the gas,
and the second early warning unit is used for acquiring a corresponding apportioned loss proportion threshold value of each line under the current operation condition, and outputting early warning information if the apportioned loss proportion value of the line is greater than the apportioned loss proportion threshold value within continuous preset time or continuous preset times.
Optionally, the first warning unit and/or the second warning unit are specifically configured to: and sending the early warning information to a user terminal.
Optionally, each line node in the power supply and power supply system is provided with a sub-module correspondingly. The acquisition module 601 includes:
a first sending unit (equivalent to the central control unit 11 in the second embodiment) configured to send a cycle start signal to each sub-module at the same time, so that after each sub-module receives the cycle start signal at the same time, the sub-module is started to start collecting electric quantity of a corresponding line node;
a second sending unit (equivalent to the central control unit 11 in the second embodiment) configured to send a cycle end signal to each sub-module when the preset cycle is ended, so that each sub-module stops the acquisition action of the sub-module after receiving the cycle end signal at the same time;
and the receiving unit is used for receiving the electric quantity which is uploaded by each submodule and is collected in the current preset period.
Optionally, the above-mentioned early warning device further includes: and a storage module (which is equivalent to the data storage unit 13 in the second embodiment) configured to, after calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the serial-parallel relationship between the nodes of each line, store the collected electric quantity and the calculated electric energy loss parameter value of each line locally and/or transmit the electric energy loss parameter value to the cloud server.
Optionally, the above-mentioned early warning device further includes:
a building module (equivalent to the data analysis unit 12 in the second embodiment) configured to build a state change trend graph of the power supply and consumption system according to the operating conditions and the stored electric energy loss parameter values of the lines after calculating the electric energy loss parameter values of the lines in real time according to the collected electric quantity and the series-parallel relationship between the line nodes;
and the display module is used for displaying the state change trend graph.
The early warning device can execute the early warning method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For the technical details that are not described in detail in this embodiment, reference may be made to the warning method provided in the embodiment of the present invention.
Example four
The present embodiment provides a power supply and consumption system, including: the early warning device of the third embodiment.
EXAMPLE five
The present embodiment provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of the above-described embodiment.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. An early warning method, comprising:
collecting the electric quantity of each line node in the power supply and consumption system in real time;
calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel connection relation of each line node;
and carrying out early warning according to the electric energy loss parameter value.
2. The method of claim 1, wherein calculating the power loss parameter value of each line in real time according to the collected electric quantity and the series-parallel relationship of each line node comprises:
determining a main path node and a branch path node according to the series-parallel relation of each line node;
calculating the electric energy loss parameter value of each line according to the electric quantity of the main path node and the electric quantity of the branch path node;
wherein the electric energy loss parameter values of each line include: the sharing loss electric energy value of each line and/or the sharing loss proportion value of each line.
3. The method of claim 2, wherein the shared dissipated power energy value for each line is calculated using the following equation:
PSAi＝[E1-(E2+E3+…+En)]×Ei/(E2+E3+…+En)，
PSAi represents the distributed loss electric energy value of the ith line, i is more than or equal to 1 and less than or equal to n, n represents the number of the lines, Ei represents the electric quantity of the ith line node, E1 represents the electric quantity of the main path node, E2-En represent the electric quantity of each branch node, and the branch nodes are connected in parallel and are all connected to the main path node.
4. The method of claim 2, wherein calculating the fractional amortization loss for each line comprises:
and calculating the ratio of the apportioned loss electric energy value of the line to the electric quantity of the line node aiming at each line to obtain the apportioned loss proportion value of the line.
5. The method of claim 1, wherein the power loss parameter values for each line comprise: the apportionment loss electric energy value of each line and/or the apportionment loss proportion value of each line;
carrying out early warning according to the electric energy loss parameter value, comprising the following steps:
aiming at each line, acquiring a corresponding apportioned loss electric energy threshold value of the line under the current operation condition, and outputting early warning information if the apportioned loss electric energy value of the line is greater than the apportioned loss electric energy threshold value within continuous preset time or continuous preset times; and/or the presence of a gas in the gas,
and aiming at each line, acquiring a corresponding apportionment loss proportion threshold value of the line under the current operation condition, and outputting early warning information if the apportionment loss proportion value of the line is greater than the apportionment loss proportion threshold value within continuous preset time or continuous preset times.
6. The method of claim 5, wherein outputting early warning information comprises: and sending the early warning information to a user terminal.
7. The method according to any one of claims 1 to 6, wherein a submodule is provided for each line node in the power supply and consumption system;
the method for acquiring the electric quantity of each line node in the power supply and consumption system in real time comprises the following steps:
simultaneously sending a period starting signal to each submodule so that each submodule is started to start to collect the electric quantity of the corresponding line node after receiving the period starting signal simultaneously;
when the preset period is over, simultaneously sending a period over signal to each submodule, so that each submodule simultaneously stops the acquisition action of the submodule after receiving the period over signal;
and receiving the electric quantity which is uploaded by each submodule and is collected in the current preset period.
8. The method according to any one of claims 1 to 6, wherein after calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel relation of each line node, the method further comprises:
and storing the collected electric quantity and the calculated electric energy loss parameter values of each line to a local place and/or transmitting the electric energy loss parameter values to a cloud server.
9. The method according to any one of claims 1 to 6, wherein after calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel relation of each line node, the method further comprises:
and constructing a state change trend graph of the power supply and consumption system according to the operating conditions and the stored electric energy loss parameter values of each line, and displaying the state change trend graph.
10. An early warning device, comprising:
the acquisition module is used for acquiring the electric quantity of each line node in the power supply and consumption system in real time;
the calculation module is used for calculating the electric energy loss parameter value of each line in real time according to the collected electric quantity and the series-parallel connection relation of each line node;
and the early warning module is used for carrying out early warning according to the electric energy loss parameter value.
11. A power supply system, comprising: the warning device of claim 10.
12. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method of any of claims 1 to 9.
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| CN116131468A (en) * | 2023-04-18 | 2023-05-16 | 国网浙江省电力有限公司宁波供电公司 | Real-time dynamic monitoring method and system for electric power system based on Internet of things |
| WO2023240954A1 (en) * | 2022-06-16 | 2023-12-21 | 珠海格力电器股份有限公司 | Early warning method and device, and power supply and consumption system |
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| CN110930019B (en) * | 2019-11-20 | 2023-01-20 | 南方电网数字电网研究院有限公司 | Line daily line loss distribution processing method and device, computer equipment and storage medium |
| CN111224469A (en) * | 2019-12-31 | 2020-06-02 | 深圳供电局有限公司 | Transmission line loss monitoring and early warning method, device, equipment and medium |
| CN114511147A (en) * | 2022-02-15 | 2022-05-17 | 广东电网有限责任公司 | Line loss monitoring and early warning method, device, equipment and storage medium |
| CN115037049A (en) * | 2022-06-16 | 2022-09-09 | 珠海格力电器股份有限公司 | Early warning method and device and power supply and utilization system |
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| CN116131468A (en) * | 2023-04-18 | 2023-05-16 | 国网浙江省电力有限公司宁波供电公司 | Real-time dynamic monitoring method and system for electric power system based on Internet of things |
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