CN110927471A - Current three-phase unbalance monitoring method and device, computer equipment and storage medium - Google Patents
Current three-phase unbalance monitoring method and device, computer equipment and storage medium Download PDFInfo
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Abstract
The application relates to a current three-phase unbalance monitoring method, a current three-phase unbalance monitoring device, computer equipment and a storage medium, wherein the method comprises the following steps: sending a current data acquisition request to a current acquisition device, wherein the current acquisition device is distributed at a current monitoring point; receiving current data uploaded by a current acquisition device in a wireless mode; collecting three-phase current data belonging to the same path in the current data; and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result. In the whole process, the current data acquired by the current acquisition device are acquired in a wireless mode, current three-phase imbalance calculation is carried out on the three-phase current data belonging to the same path in the current data, and a current three-phase imbalance monitoring result is accurately and efficiently obtained.
Description
Technical Field
The application relates to the technical field of power grids, in particular to a current three-phase imbalance monitoring method and device, computer equipment and a storage medium.
Background
In an electric power system, the unbalanced three phases of current mean that the loads output by the three phases of current are different in size, so that the loss of a transformer is increased, the local temperature rise of the transformer is excessively large seriously, the service life of the transformer is shortened, and even the transformer is burnt; for the transmission line, the line loss is increased, and the line tripping probability is increased.
Therefore, the stable operation of the power grid can be influenced by the three-phase unbalance of the current of the power system, and the monitoring of the current unbalance is the basis for controlling the three-phase unbalance of the current. The traditional current three-phase imbalance detection mode is that electric energy quality measuring equipment is adopted, a worker carries the electric energy quality measuring equipment to a detection point, the detection point is connected with the electric energy quality measuring equipment, and the electric energy quality measuring equipment acquires electric energy quality detection data including a current three-phase imbalance detection result after analyzing and processing current data at the detection point.
Although the above-mentioned mode can realize the unbalanced monitoring of electric current three-phase, its realization process needs artifical portable equipment to appointed check point, still need in addition with the help of special electric energy quality measuring equipment, realizes that the process is complicated and inefficient.
Disclosure of Invention
In view of the above, it is necessary to provide a method, an apparatus, a computer device and a storage medium for monitoring current three-phase imbalance, which are efficient and simple.
A method of current three-phase imbalance monitoring, the method comprising:
sending a current data acquisition request to a current acquisition device, wherein the current acquisition device is distributed at a current monitoring point;
receiving current data uploaded by the current acquisition device in a wireless mode;
collecting three-phase current data belonging to the same path in the current data;
and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
In one embodiment, the calculating of the current three-phase imbalance according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result includes:
selecting any group of three-phase current data belonging to the same path;
analyzing the positive sequence component and the negative sequence component of the selected three-phase current data to obtain a component analysis result;
and obtaining the current three-phase unbalance according to the component analysis result.
In one embodiment, the calculating of the current three-phase imbalance according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result includes:
randomly and repeatedly selecting any group of three-phase current data belonging to the same path;
analyzing the positive sequence component and the negative sequence component of the current group of three-phase current data to obtain a component analysis result;
according to the component analysis result, obtaining the current three-phase unbalance degree corresponding to the current group of three-phase current data, and returning to the step of randomly and repeatedly selecting any group of three-phase current data belonging to the same path;
and calculating the average value of the current three-phase unbalance degrees corresponding to each group of three-phase current data to obtain the current three-phase unbalance degrees.
In one embodiment, the obtaining of the current three-phase imbalance degree according to the component analysis result includes:
acquiring a positive sequence component root mean square value and a negative sequence component root mean square value in the component analysis result;
and calculating the ratio of the positive sequence component root mean square value to the negative sequence component root mean square value to obtain the current three-phase unbalance degree.
In one embodiment, the current data includes an identification of the current collection device and a current value collected by the current collection device.
In one embodiment, the collecting the three-phase current data belonging to the same path in the current data includes:
acquiring the position relation of the current acquisition devices in distribution;
and collecting the three-phase current data belonging to the same path in the current data according to the position relation and the identity marks carried in the current data.
In one embodiment, the receiving the current data uploaded by the current collecting device in a wireless manner includes:
receiving data uploaded by the current acquisition device in a wireless mode;
decapsulating the received data by using a preset wireless communication protocol to obtain communication protocol decapsulated data, wherein the preset wireless communication protocol corresponds to the wireless mode;
and carrying out current waveform file decapsulation on the communication protocol decapsulation data to obtain current data.
A current three-phase imbalance monitoring device, the device comprising:
the device comprises a request sending module, a current acquisition module and a current monitoring module, wherein the request sending module is used for sending a current data acquisition request to a current acquisition device, and the current acquisition device is arranged at a current monitoring point in a distributed manner;
the data receiving module is used for receiving the current data uploaded by the current acquisition device in a wireless mode;
the data collection module is used for collecting three-phase current data belonging to the same path in the current data;
and the calculation module is used for carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
sending a current data acquisition request to a current acquisition device, wherein the current acquisition device is distributed at a current monitoring point;
receiving current data uploaded by the current acquisition device in a wireless mode;
collecting three-phase current data belonging to the same path in the current data;
and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
sending a current data acquisition request to a current acquisition device, wherein the current acquisition device is distributed at a current monitoring point;
receiving current data uploaded by the current acquisition device in a wireless mode;
collecting three-phase current data belonging to the same path in the current data;
and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
According to the current three-phase imbalance monitoring method and device, the computer equipment and the storage medium, a current data acquisition request is sent to the current acquisition device, and the current acquisition device is distributed at a current monitoring point; receiving current data uploaded by the current acquisition device in a wireless mode; collecting three-phase current data belonging to the same path in the current data; and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result. In the whole process, the current data acquired by the current acquisition device are acquired in a wireless mode, current three-phase imbalance calculation is carried out on the three-phase current data belonging to the same path in the current data, and a current three-phase imbalance monitoring result is accurately and efficiently obtained.
Drawings
FIG. 1 is a diagram of an exemplary embodiment of a method for monitoring current imbalance;
FIG. 2 is a schematic flow chart of a current three-phase imbalance monitoring method according to an embodiment;
FIG. 3 is a schematic flow chart of a current three-phase imbalance monitoring method in another embodiment;
FIG. 4 is a schematic flow chart of a current three-phase imbalance monitoring method in yet another embodiment;
FIG. 5 is a schematic diagram of data transmission between a master station and a current data acquisition device;
FIG. 6 is a block diagram of a current three-phase imbalance monitoring apparatus according to an embodiment;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The current three-phase imbalance monitoring method provided by the application can be applied to the application environment shown in fig. 1. The monitoring terminal collects three-phase current data in a power grid and transmits the three-phase current data to a remote master station in a wireless mode, and the master station receives the current data uploaded by the current collection devices in the wireless mode; collecting three-phase current data belonging to the same path in the current data; and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result. The monitoring terminal can comprise a plurality of distributed current acquisition sensors, and the plurality of current acquisition sensors respectively acquire three-phase currents on different lines in the power grid.
In one embodiment, as shown in fig. 2, a method for monitoring current imbalance in three phases is provided, which is exemplified by the method applied to the main station in fig. 1, and includes the following steps:
s200: and sending a current data acquisition request to a current acquisition device, wherein the current acquisition device is distributed at a current monitoring point.
The main station can regularly execute the current three-phase imbalance monitoring task according to a preset period, for example, every 1 minute, every 1 hour and the like, and can respond to the artificial current three-phase imbalance monitoring requirement and immediately execute the current three-phase imbalance monitoring task. When the main station executes a current three-phase imbalance monitoring task, a current data acquisition request is sent to the current acquisition device so as to request the current acquisition device to acquire current data on different lines in the current power grid. The current collection device refers to a device, equipment, a device and the like for collecting current, and specifically may be a current collection sensor, and the current collection devices are distributed at each current monitoring point, which may be specifically shown in fig. 1 as a schematic of a monitoring terminal.
S400: and receiving current data uploaded by the current acquisition device in a wireless mode.
The master station receives current data uploaded by the current acquisition device in a wireless mode, wherein the wireless mode specifically comprises a wireless local area network, a mobile communication network and the like. Optionally, a local data center (server) may be further disposed between the master station and the current collecting device, the current collecting device uploads the current data to the local data center (server) first, the local data center (server) then uploads the current data to the master station in a wireless manner, and a short-distance wireless communication supporting manner, such as bluetooth communication, near field communication, or the like, may be employed between the current collecting device and the local data center (server). Further, the current data may carry the collected current value and an identification identifier of the current collection device, such as an identification ID, where the identification identifier is used to determine which current collection device collects the current value, so as to further determine which position in the power grid and which line the current data belongs to.
S600: and collecting three-phase current data belonging to the same path in the current data.
And (3) collecting the three-phase current data belonging to the same path in the current data, namely collecting A, B, C three-phase current data belonging to the same path in the current data, and taking the three-phase current data belonging to the same path as a data group to perform the next current three-phase imbalance calculation.
S800: and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
The current three-phase imbalance can be calculated by adopting a mode of (maximum current-minimum current)/maximum current, MAX (phase current-three-phase average current)/three-phase average current and the like, and a calculation result is obtained. Optionally, the calculation result may be embodied as a current three-phase imbalance.
According to the current three-phase imbalance monitoring method, a current data acquisition request is sent to a current acquisition device, and the current acquisition device is distributed at a current monitoring point; receiving current data uploaded by a current acquisition device in a wireless mode; collecting three-phase current data belonging to the same path in the current data; and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result. In the whole process, the current data acquired by the current acquisition device are acquired in a wireless mode, current three-phase imbalance calculation is carried out on the three-phase current data belonging to the same path in the current data, and a current three-phase imbalance monitoring result is accurately and efficiently obtained.
As shown in fig. 3, in one embodiment, step S800 includes:
s810: and selecting any group of three-phase current data belonging to the same path.
S820: and analyzing the positive sequence component and the negative sequence component of the selected three-phase current data to obtain a component analysis result.
S830: and obtaining the current three-phase unbalance according to the component analysis result.
The current data received by the main station may include multiple groups (multiple paths) of three-phase current data, wherein any group of three-phase current data belonging to the same path is selected as current three-phase imbalance calculation data. Current three-phase unbalance epsilonIThrough calculation of each sequence component of the current, according to the basic concept of a symmetric component method, the three-phase electric quantity of a three-phase system can be theoretically divided into three symmetric components: and calculating the positive sequence component, the negative sequence component and the zero sequence component according to the positive sequence component and the negative sequence component to obtain the current three-phase unbalance. In this embodiment, a brand new current three-phase imbalance calculation method is adopted to efficiently and accurately obtain current three phasesThe degree of unbalance. Further, the ratio of the positive sequence component root mean square value to the negative sequence component root mean square value can be calculated to obtain the current three-phase unbalance degree, that is, the current three-phase unbalance degree is as follows:
wherein I1、I2Respectively representing the square root mean of the positive sequence component and the negative sequence component of the current.
As shown in fig. 4, in one embodiment, step S800:
s840: randomly and repeatedly selecting any group of three-phase current data belonging to the same path;
s850: analyzing the positive sequence component and the negative sequence component of the current group of three-phase current data to obtain a component analysis result;
s860: according to the component analysis result, obtaining the current three-phase unbalance degree corresponding to the current group of three-phase current data, and returning to the step of randomly and repeatedly selecting any group of three-phase current data belonging to the same path;
s870: and calculating the average value of the current three-phase unbalance degrees corresponding to each group of three-phase current data to obtain the current three-phase unbalance degrees.
In this embodiment, the average value of the current three-phase unbalances corresponding to the different sets of three-phase current data is obtained to obtain the current three-phase unbalances, so as to further improve the accuracy of the current three-phase unbalances.
In one embodiment, the collecting of the three-phase current data belonging to the same path in the current data includes:
acquiring the position relation of the current acquisition devices in distribution; and collecting the three-phase current data belonging to the same path in the current data according to the position relation and the identity marks carried in the current data.
And the master station couples the information of the dispersed current sensors together for analysis according to the arrangement relationship of the current acquisition devices, the connection relationship among the nodes, the standing account relationship of the power system and the like. For the ABC three-phase current of the same line, the ABC three-phase current is measured through the 3 current sensors, and data of the three sensors are stored in a regular mode according to the corresponding relation, so that subsequent data analysis is facilitated. The relationship is established by normalizing the data of the same type of current sensor together, with reference to the following table.
In one embodiment, the receiving the current data uploaded by the current collection device in a wireless manner includes:
receiving data uploaded by a current acquisition device in a wireless mode; decapsulating the received data by using a preset wireless communication protocol to obtain communication protocol decapsulated data, wherein the preset wireless communication protocol corresponds to a wireless mode; and carrying out current waveform file decapsulation on the communication protocol decapsulation data to obtain current data.
When collecting current value data, the current acquisition device packages the current value data by adopting a current waveform file, then packages the current waveform file based on a communication protocol corresponding to a current wireless mode, sends the packaged current waveform file to a master station in a wireless mode, and when the master station receives the data, decapsulates the received data by a preset wireless communication protocol to obtain decapsulated data of the communication protocol, and decapsulates the decapsulated data of the communication protocol by adopting the current waveform file to obtain the current data. The specific data transmission process can be seen in fig. 5.
Practical application the current three-phase imbalance monitoring method specifically comprises the following processing steps:
1. and finishing the installation of the current monitoring terminal and the local data center in the monitoring area. The monitoring area refers to an area accurately monitored in advance, for example, a power distribution network of a certain county and county bureau, the current monitoring terminal comprises a plurality of current sensors which are arranged in a distributed mode, and each current sensor respectively collects one path of current data. The local data center is used for storing and backing up the locally acquired current data.
2. The system is powered on and running, and the current sensor is ready to wirelessly transmit current data. And the system is electrified and operated, the wireless transmission point starts to work, and a wireless transmission network is constructed. The current sensor is used for uploading acquired current data in a wireless mode.
3. The local data center collects current data for all current sensors. And collecting current data of a plurality of current sensors in the local data, and packaging the current data with current sensor identities ID.
4. And the local data center regulates the data according to the established relation and completes the calculation of the three-phase unbalance. The data center encapsulates the packaged data according to a preset wireless communication protocol, the encapsulated data are sent to a master station, and the master station receives current data uploaded by a current acquisition device in a wireless mode; collecting three-phase current data belonging to the same path in the current data; and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
It should be understood that although the various steps in the flow charts of fig. 2-4 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-4 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
As shown in fig. 6, the present application further provides a current three-phase imbalance monitoring device, comprising:
a request sending module 200, configured to send a current data acquisition request to a current acquisition device, where the current acquisition device is distributed at a current monitoring point;
the data receiving module 400 is used for receiving current data uploaded by the current acquisition device in a wireless mode;
the data collecting module 600 is configured to collect three-phase current data belonging to the same path in the current data;
and the calculating module 800 is configured to perform current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
The current three-phase imbalance monitoring device sends a current data acquisition request to a current acquisition device, and the current acquisition device is distributed at a current monitoring point; receiving current data uploaded by a current acquisition device in a wireless mode; collecting three-phase current data belonging to the same path in the current data; and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result. In the whole process, the current data acquired by the current acquisition device are acquired in a wireless mode, current three-phase imbalance calculation is carried out on the three-phase current data belonging to the same path in the current data, and a current three-phase imbalance monitoring result is accurately and efficiently obtained.
In one embodiment, the calculation module 800 is further configured to select any group of three-phase current data belonging to the same path; analyzing the positive sequence component and the negative sequence component of the selected three-phase current data to obtain a component analysis result; and obtaining the current three-phase unbalance according to the component analysis result.
In one embodiment, the calculation module 800 is further configured to randomly and repeatedly select any one group of three-phase current data belonging to the same path; analyzing the positive sequence component and the negative sequence component of the current group of three-phase current data to obtain a component analysis result; according to the component analysis result, obtaining the current three-phase unbalance degree corresponding to the current group of three-phase current data, and returning to the operation of randomly and repeatedly selecting any group of three-phase current data belonging to the same path; and calculating the average value of the current three-phase unbalance degrees corresponding to each group of three-phase current data to obtain the current three-phase unbalance degrees.
In one embodiment, the calculation module 800 is further configured to obtain a positive sequence component root mean square value and a negative sequence component root mean square value according to the component analysis result; and calculating the ratio of the positive sequence component root mean square value to the negative sequence component root mean square value to obtain the current three-phase unbalance.
In one embodiment, the current data includes an identification of the current collection device and a value of the current collected by the current collection device.
In one embodiment, the data collection module 600 is further configured to obtain a position relationship of the distribution settings of the current collection devices; and collecting the three-phase current data belonging to the same path in the current data according to the position relation and the identity marks carried in the current data.
In one embodiment, the data receiving module 400 is further configured to receive data uploaded by the current collecting apparatus in a wireless manner; decapsulating the received data by using a preset wireless communication protocol to obtain communication protocol decapsulated data, wherein the preset wireless communication protocol corresponds to a wireless mode; and carrying out current waveform file decapsulation on the communication protocol decapsulation data to obtain current data.
For specific limitations of the current three-phase imbalance monitoring device, reference may be made to the above limitations of the current three-phase imbalance monitoring method, which are not described herein again. The modules in the current three-phase imbalance monitoring device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer equipment is used for storing data such as distribution setting positions of the current collecting devices. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a current three-phase imbalance monitoring method.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
sending a current data acquisition request to a current acquisition device, wherein the current acquisition device is distributed at a current monitoring point;
receiving current data uploaded by a current acquisition device in a wireless mode;
collecting three-phase current data belonging to the same path in the current data;
and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
selecting any group of three-phase current data belonging to the same path; analyzing the positive sequence component and the negative sequence component of the selected three-phase current data to obtain a component analysis result; and obtaining the current three-phase unbalance according to the component analysis result.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
randomly and repeatedly selecting any group of three-phase current data belonging to the same path; analyzing the positive sequence component and the negative sequence component of the current group of three-phase current data to obtain a component analysis result; according to the component analysis result, obtaining the current three-phase unbalance degree corresponding to the current group of three-phase current data, and returning to the step of randomly and repeatedly selecting any group of three-phase current data belonging to the same path; and calculating the average value of the current three-phase unbalance degrees corresponding to each group of three-phase current data to obtain the current three-phase unbalance degrees.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring a positive sequence component root mean square value and a negative sequence component root mean square value in the component analysis result; and calculating the ratio of the positive sequence component root mean square value to the negative sequence component root mean square value to obtain the current three-phase unbalance.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring the position relation of the current acquisition devices in distribution; and collecting the three-phase current data belonging to the same path in the current data according to the position relation and the identity marks carried in the current data.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
receiving data uploaded by a current acquisition device in a wireless mode; decapsulating the received data by using a preset wireless communication protocol to obtain communication protocol decapsulated data, wherein the preset wireless communication protocol corresponds to a wireless mode; and carrying out current waveform file decapsulation on the communication protocol decapsulation data to obtain current data.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
sending a current data acquisition request to a current acquisition device, wherein the current acquisition device is distributed at a current monitoring point;
receiving current data uploaded by a current acquisition device in a wireless mode;
collecting three-phase current data belonging to the same path in the current data;
and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
In one embodiment, the computer program when executed by the processor further performs the steps of:
selecting any group of three-phase current data belonging to the same path; analyzing the positive sequence component and the negative sequence component of the selected three-phase current data to obtain a component analysis result; and obtaining the current three-phase unbalance according to the component analysis result.
In one embodiment, the computer program when executed by the processor further performs the steps of:
randomly and repeatedly selecting any group of three-phase current data belonging to the same path; analyzing the positive sequence component and the negative sequence component of the current group of three-phase current data to obtain a component analysis result; according to the component analysis result, obtaining the current three-phase unbalance degree corresponding to the current group of three-phase current data, and returning to the step of randomly and repeatedly selecting any group of three-phase current data belonging to the same path; and calculating the average value of the current three-phase unbalance degrees corresponding to each group of three-phase current data to obtain the current three-phase unbalance degrees.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring a positive sequence component root mean square value and a negative sequence component root mean square value in the component analysis result; and calculating the ratio of the positive sequence component root mean square value to the negative sequence component root mean square value to obtain the current three-phase unbalance.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring the position relation of the current acquisition devices in distribution; and collecting the three-phase current data belonging to the same path in the current data according to the position relation and the identity marks carried in the current data.
In one embodiment, the computer program when executed by the processor further performs the steps of:
receiving data uploaded by a current acquisition device in a wireless mode; decapsulating the received data by using a preset wireless communication protocol to obtain communication protocol decapsulated data, wherein the preset wireless communication protocol corresponds to a wireless mode; and carrying out current waveform file decapsulation on the communication protocol decapsulation data to obtain current data.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of current three-phase imbalance monitoring, the method comprising:
sending a current data acquisition request to a current acquisition device, wherein the current acquisition device is distributed at a current monitoring point;
receiving current data uploaded by the current acquisition device in a wireless mode;
collecting three-phase current data belonging to the same path in the current data;
and carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
2. The method according to claim 1, wherein the calculating of the current three-phase imbalance according to the three-phase current data belonging to the same path to obtain the current three-phase imbalance monitoring result comprises:
selecting any group of three-phase current data belonging to the same path;
analyzing the positive sequence component and the negative sequence component of the selected three-phase current data to obtain a component analysis result;
and obtaining the current three-phase unbalance according to the component analysis result.
3. The method according to claim 1, wherein the calculating of the current three-phase imbalance according to the three-phase current data belonging to the same path to obtain the current three-phase imbalance monitoring result comprises:
randomly and repeatedly selecting any group of three-phase current data belonging to the same path;
analyzing the positive sequence component and the negative sequence component of the current group of three-phase current data to obtain a component analysis result;
according to the component analysis result, obtaining the current three-phase unbalance degree corresponding to the current group of three-phase current data, and returning to the step of randomly and repeatedly selecting any group of three-phase current data belonging to the same path;
and calculating the average value of the current three-phase unbalance degrees corresponding to each group of three-phase current data to obtain the current three-phase unbalance degrees.
4. The method of claim 2, wherein obtaining the current three-phase imbalance degree according to the component analysis result comprises:
acquiring a positive sequence component root mean square value and a negative sequence component root mean square value in the component analysis result;
and calculating the ratio of the positive sequence component root mean square value to the negative sequence component root mean square value to obtain the current three-phase unbalance degree.
5. The method of claim 1, wherein the current data includes an identification of a current collection device and a value of current collected by the current collection device.
6. The method of claim 5, wherein the collecting the three-phase current data belonging to the same path in the current data comprises:
acquiring the position relation of the current acquisition devices in distribution;
and collecting the three-phase current data belonging to the same path in the current data according to the position relation and the identity marks carried in the current data.
7. The method of claim 1, wherein the receiving the current data wirelessly uploaded by the current collection device comprises:
receiving data uploaded by the current acquisition device in a wireless mode;
decapsulating the received data by using a preset wireless communication protocol to obtain communication protocol decapsulated data, wherein the preset wireless communication protocol corresponds to the wireless mode;
and carrying out current waveform file decapsulation on the communication protocol decapsulation data to obtain current data.
8. A current imbalance monitoring device, the device comprising:
the device comprises a request sending module, a current acquisition module and a current monitoring module, wherein the request sending module is used for sending a current data acquisition request to a current acquisition device, and the current acquisition device is arranged at a current monitoring point in a distributed manner;
the data receiving module is used for receiving the current data uploaded by the current acquisition device in a wireless mode;
the data collection module is used for collecting three-phase current data belonging to the same path in the current data;
and the calculation module is used for carrying out current three-phase imbalance calculation according to the three-phase current data belonging to the same path to obtain a current three-phase imbalance monitoring result.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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