A monitoring method and system for low voltage distributed power supply based on event message

Abstract

The present invention discloses a monitoring method and system for low-voltage distributed power sources based on event messages, belonging to the technical field of power distribution systems, the method comprising: deploying a monitoring APP at a low-voltage substation gateway concentrator, acquiring electrical quantity data of each low-voltage distributed power source in batches, and storing each batch of electrical quantity data as a group of initial data of the low-voltage distributed power source; installing monitoring equipment at the low-voltage distributed power source to monitor the electrical quantity data of the low-voltage distributed power source in real time; when one or more electrical quantity data of a certain low-voltage distributed power source changes, the corresponding monitoring equipment generates a data change event, and reports the data change amount to the monitoring APP through a communication channel; the monitoring APP calculates the current data of the electrical quantity of the low-voltage distributed power source at that location based on the data change amount reported by the monitoring equipment and the initial data of each low-voltage distributed power source already stored internally, and uses it as the latest data of the low-voltage distributed power source at that location.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution and power consumption systems, and in particular to a monitoring method and system for low-voltage distributed power sources based on event messages. Background Art

[0002] With the continuous development of new energy, the number of low-voltage distributed power sources is increasing. In order to effectively monitor these distributed power sources, it is necessary to install monitoring equipment near the low-voltage distributed power sources to realize real-time monitoring and collection of various electrical quantities of low-voltage distributed power sources. However, with the gradual increase in the number of monitoring devices, according to the traditional data collection method, the monitoring devices are polled one by one. Due to the order of the collection process, there is a certain time difference in the data collected successively, and the real-time performance of each electrical quantity data cannot be guaranteed. At the same time, the traditional data collection method will collect the full amount of data of the distributed power monitoring device. For the electrical quantity data that has not changed, there is repeated redundant collection. For the electrical quantity data collected repeatedly and redundantly, the communication channel will be occupied during the communication process. In the case of too many distributed power monitoring devices, it is easy to cause congestion in the communication channel, which will seriously affect the data collection of existing electricity consumption information. Summary of the invention

[0003] In order to solve the problems of low real-time performance of distributed power monitoring data and high occupancy rate of communication channels. The present invention changes the polling collection mode to an asynchronous reporting mode, and changes the full data collection to a variable data collection mode, thereby effectively improving the real-time performance of data collection, reducing the occupancy rate of communication channels, ensuring the stability of existing power consumption information data collection, and realizing effective monitoring of low-voltage distributed power sources. The specific implementation method is as follows:

[0004] A first aspect of the present invention provides a method for monitoring a low voltage distributed power supply based on an event message, comprising the following steps:

[0005] Deploy monitoring software at the low-voltage substation gateway concentrator to obtain the electrical quantity data of each low-voltage distributed power source in batches and perform data preprocessing, and store each batch of electrical quantity data as a set of initial data of the low-voltage distributed power source;

[0006] Install monitoring equipment on low-voltage distributed power sources to monitor the electrical quantity data of low-voltage distributed power sources in real time;

[0007] When one or more electrical quantity data of a low-voltage distributed power source changes, the corresponding monitoring device will generate a data change event and report the data change to the monitoring software through the communication channel;

[0008] The monitoring software calculates the current data of the electrical quantity of the low-voltage distributed power source based on the data changes reported by the monitoring equipment and the initial data of each low-voltage distributed power source stored internally, and uses it as the latest data of the low-voltage distributed power source.

[0009] Optionally, the data preprocessing includes data cleaning, data standardization and format conversion.

[0010] Optionally, the electrical quantity data includes voltage, current and active power of the low-voltage distributed power source.

[0011] Optionally, reporting the data change amount to the monitoring software via a communication channel includes:

[0012] When only data A changes in the first monitoring device, only the change in data A is reported to the monitoring software, and data B and data C are not reported; when data A and data B change in the second monitoring device, only the change in data A and data B is reported to the monitoring software, and data C is not reported; when data A, B, and C all change in the third monitoring device, the change in data A, B, and C will all be reported to the monitoring software.

[0013] Optionally, the data change amount reporting method is an asynchronous reporting method.

[0014] Optionally, the method further includes performing real-time analysis on the data changes reported by the monitoring device, checking whether an abnormal situation exceeding a preset threshold occurs, and taking corresponding response measures.

[0015] Optionally, the preset threshold includes a voltage threshold range of 210V to 240V, and the total active power is not greater than the actual rated power of the low-voltage distributed power supply.

[0016] A second aspect of the present invention provides a low-voltage distributed power supply monitoring system based on event messages, based on a low-voltage distributed power supply monitoring method based on event messages described in the first aspect of the present invention, characterized in that the system comprises:

[0017] Low-voltage area gateway concentrator, low-voltage distributed power monitoring equipment, monitoring software, data storage and management module and communication module;

[0018] The low-voltage area gateway concentrator is used to obtain the electrical quantity data of each low-voltage distributed power source in batches, and store each batch of electrical quantity data as a set of initial data of the low-voltage distributed power source;

[0019] The low voltage distributed power supply monitoring equipment is used to collect and upload the electrical quantity data of the low voltage distributed power supply to the monitoring software;

[0020] The monitoring software is used to receive and process the data changes uploaded by the monitoring equipment, and calculate the current value of the electrical quantity based on the stored initial data, and update the electrical quantity data in real time;

[0021] The data storage and management module is used to store the initial electrical quantity data, real-time electrical quantity data and historical change data of the low-voltage distributed power supply;

[0022] The communication module is used to transmit data between various devices.

[0023] Optionally, the system further includes an intelligent analysis and alarm module for analyzing real-time data, determining whether there are any abnormal conditions, and taking corresponding response measures based on the analysis results.

[0024] Optionally, the system further comprises a front-end display module, which provides an interface for users to interact with the system, displays real-time and historical electrical quantity data, and supports system management and settings.

[0025] In summary, compared with the prior art, the beneficial effects of this aspect include at least: the present invention changes the data collection method from polling and reading one by one to asynchronous reporting, and changes the collection of full data to only the collection of changes, which not only ensures the real-time nature of the data, but also reduces the occupation of the communication channel. The efficient collection and monitoring of low-voltage distributed power sources in the substation area is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the collection method of the present invention;

[0027] Figure 2 Schematic diagram of traditional data collection method. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0029] The present invention provides a method for monitoring a low-voltage distributed power supply based on an event message in embodiment 1, comprising the following steps:

[0030] Step 1: deploy a monitoring APP at the low-voltage area gateway concentrator, obtain the electrical quantity data of each low-voltage distributed power source in batches and perform data preprocessing, and store each batch of electrical quantity data as a set of initial data of the low-voltage distributed power source;

[0031] In a further preferred but non-limiting embodiment, in step 1, a monitoring device is installed near the low-voltage distributed power source, and the device has a data monitoring function;

[0032] In a further preferred but non-limiting embodiment, in step 1, the electrical quantity data includes the voltage, current and active power of the low-voltage distributed power source.

[0033] In a further preferred but non-limiting embodiment, in step 1, data preprocessing includes data cleaning, data standardization and format conversion.

[0034] Step 2: Install monitoring equipment on the low-voltage distributed power source to monitor the electrical quantity data of the low-voltage distributed power source in real time;

[0035] Step 3: When one or more electrical quantity data of a low-voltage distributed power source changes, the corresponding monitoring device will generate a data change event and report the data change to the monitoring APP through the communication channel;

[0036] In a further preferred but non-limiting embodiment, in step 3, reporting the data change to the monitoring APP via the communication channel includes:

[0037] When only data A changes in monitoring device A, only the change in data A is reported to the monitoring APP, and data B and data C are not reported; when data A and data B change in monitoring device B, only the change in data A and data B is reported to the monitoring APP, and data C is not reported; when data A, B, and C all change in monitoring device C, the change in data A, B, and C will all be reported to the monitoring APP.

[0038] Specifically, the traditional data collection method requires the monitoring APP to read the data of the monitoring devices one by one. When there are a large number of monitoring devices in the substation, there is a sequence in the collection process, such as Figure 2 As shown: the monitoring APP will collect data from monitoring device A, monitoring device B, and monitoring device C in sequence. There is a certain time difference between the data collected successively, and the real-time nature of the electrical quantity data cannot be guaranteed. Figure 2 In monitoring device A, only data A has changed, but the monitoring APP will collect all data in monitoring device A. Similarly, in monitoring device B, only data A and data B have changed, and the monitoring APP will also collect all data in device B. For data C that has not changed, there is repeated redundant collection. For the redundantly collected electrical quantity data, the communication channel will be occupied during the communication process. When there are too many distributed power monitoring devices, it is easy to cause congestion in the communication channel, which will seriously affect the data collection of existing power consumption information.

[0039] The collection method of the present invention is as follows Figure 1 As shown in the figure, when only data A of monitoring device A changes, only the change of data A is reported to the monitoring APP, and data B and data C are not reported. When data A and data B of monitoring device B change, only the change of data A and data B is reported to the monitoring APP, and data C is not reported. When data A, B, and C of monitoring device C all change, the change of data A, B, and C will be reported to the monitoring APP. When the monitoring APP receives the data change event reported by the monitoring device, it will calculate the current data of the electrical quantity of the low-voltage distributed power source at the location based on the data change reported by the monitoring device and the initial data of each low-voltage distributed power source stored internally, and use the data as the latest data of the low-voltage distributed power source at the location. This collection method will only report the changed data instead of reporting all the data to the monitoring APP. In addition, this collection method is an asynchronous reporting method, which can effectively reduce the occupation of the communication channel and ensure the real-time collection of various data in the substation.

[0040] Step 4: The monitoring APP calculates the current data of the electrical quantity of the low-voltage distributed power source based on the data changes reported by the monitoring device and the initial data of each low-voltage distributed power source stored internally, and uses it as the latest data of the low-voltage distributed power source.

[0041] In a further preferred but non-limiting embodiment, the method further includes performing real-time analysis on the data change reported by the monitoring device, checking whether an abnormality exceeding a preset threshold occurs, and taking corresponding response measures;

[0042] Specifically, the preset threshold includes:

[0043] In the present invention, the threshold range of voltage is 210V~240V, and the threshold range of current and active power is determined according to the actual capacity of distributed power source. The threshold of each data item does not involve the dependency relationship with each other, and only considers the change between this time and the last time. When the degree of change exceeds the measurement accuracy of the data item, it needs to be reported. If it is within the measurement accuracy range, it can be considered as a measurement error fluctuation and does not need to be reported.

[0044] Specifically, the total active power cannot be greater than the actual capacity of the distributed power source. For example, if the actual rated power of the distributed power source is 50KW, then the three-phase total active power cannot be greater than 50KW. According to the formula I = P / U, the three-phase total current cannot be greater than the value of the rated power divided by the actual voltage.

[0045] Specifically, to further illustrate the method described in Example 1, the following specific examples are provided exemplarily:

[0046] 1. The 22nd version of the container concentrator currently purchased by the power company has the function of deploying APP, which can realize the deployment of monitoring APP. The photovoltaic storage protocol converter has the monitoring function of low-voltage distributed power supply and event reporting function, and can be used as a monitoring device.

[0047] 2. Complete the deployment of the monitoring APP in the 22nd version of the container concentrator at the low-voltage station area. The container concentrator can obtain all the electrical quantity data of each low-voltage distributed power source in batches and multiple times as a set of initial data for each low-voltage distributed power source and store it in the monitoring APP. Installing a photovoltaic storage protocol converter near the low-voltage distributed power source can monitor the voltage, current, active power and other electrical quantity data of the low-voltage distributed power source in real time.

[0048] 3. When one or more electrical quantity data of a low-voltage distributed power source changes, the corresponding photovoltaic storage protocol converter can generate a data change event for the corresponding data change, and report it to the APP deployed in the concentrator through the existing HPLC in the substation. If only the voltage data changes, only the change in the voltage data is reported; if both the voltage and current data change, both the voltage and current data are reported to the concentrator, that is, only the changed data is reported.

[0049] 4. When the concentrator receives a data change event reported by the photovoltaic storage protocol converter, based on the initial data of each low-voltage distributed power supply stored in the monitoring APP, the current data of each electrical quantity of the corresponding low-voltage distributed power supply can be calculated, and the data can be used as the latest data of the low-voltage distributed power supply at that location to update the initial data inside the monitoring APP.

[0050] 5. Since the photovoltaic storage protocol converter only reports the changes in the monitoring data, there is no need to report the data that has not changed, and it can be kept consistent with the previous data. This minimizes the data that needs to be reported, ensures the real-time nature of the data, and minimizes the occupancy of the communication channel, thus achieving efficient collection and monitoring of low-voltage distributed power sources in the substation area.

[0051] The present invention provides a monitoring system for a low-voltage distributed power source based on an event message in Example 2, based on a monitoring method for a low-voltage distributed power source based on an event message described in Example 1 of the present invention, characterized in that the system comprises:

[0052] Low-voltage area gateway concentrator, low-voltage distributed power monitoring equipment, monitoring APP, data storage and management module and communication module;

[0053] The low-voltage area gateway concentrator is used to obtain the electrical quantity data of each low-voltage distributed power source in batches, and store each batch of electrical quantity data as a set of initial data of the low-voltage distributed power source;

[0054] The low-voltage distributed power supply monitoring equipment is used to collect and upload the electrical quantity data of the low-voltage distributed power supply to the detection APP;

[0055] The monitoring APP is used to receive and process the data changes uploaded by the monitoring equipment, and calculate the current value of the electrical quantity based on the stored initial data, and update the electrical quantity data in real time;

[0056] The data storage and management module is used to store the initial electrical quantity data, real-time electrical quantity data and historical change data of the low-voltage distributed power supply;

[0057] The communication module is used to transmit data between various devices.

[0058] In a further preferred but non-limiting embodiment, the system further includes an intelligent analysis and alarm module for analyzing real-time data, determining whether there are any abnormal conditions, and taking corresponding response measures based on the analysis results.

[0059] In a further preferred but non-limiting embodiment, the system further includes a front-end display module, which provides an interface for users to interact with the system, displays real-time and historical electrical quantity data, and supports system management and settings.

[0060] The present invention provides an electronic device in Example 3, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is loaded into the processor, it implements a method for monitoring a low-voltage distributed power supply based on event messages according to Example 1 of the present invention.

[0061] The present invention provides a computer-readable storage medium in Example 4, which stores a computer program. When the computer program is executed by a processor, it implements a low-voltage distributed power supply monitoring method based on event messages according to Example 1 of the present invention.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for monitoring low voltage distributed power supply based on event message, characterized in that: The steps include: Deploy monitoring software at the low-voltage substation gateway concentrator to obtain the electrical quantity data of each low-voltage distributed power source in batches and perform data preprocessing, and store each batch of electrical quantity data as a set of initial data of the low-voltage distributed power source; Install monitoring equipment on low-voltage distributed power sources to monitor the electrical quantity data of low-voltage distributed power sources in real time; When one or more electrical quantity data of a low-voltage distributed power source changes, the corresponding monitoring device generates a data change event and reports the data change to the monitoring software through the communication channel; The monitoring software calculates the current data of the electrical quantity of the low-voltage distributed power source based on the data changes reported by the monitoring equipment and the initial data of each low-voltage distributed power source stored internally, and uses it as the latest data of the low-voltage distributed power source.

2. The method for monitoring low voltage distributed power supply based on event message according to claim 1, characterized in that: The electrical quantity data includes the voltage, current and active power of the low-voltage distributed power source.

3. The method for monitoring low voltage distributed power supply based on event message according to claim 1, characterized in that: The data preprocessing includes data cleaning, data standardization and format conversion.

4. The method for monitoring low voltage distributed power supply based on event message according to claim 1, characterized in that: The step of reporting the data change to the monitoring software via the communication channel includes: When only data A changes in the first monitoring device, only the change in data A is reported to the monitoring software, and data B and data C are not reported; when data A and data B change in the second monitoring device, only the change in data A and data B is reported to the monitoring software, and data C is not reported; when data A, B, and C all change in the third monitoring device, the change in data A, B, and C will all be reported to the monitoring software.

5. The method for monitoring low voltage distributed power supply based on event message according to claim 4 is characterized in that: The data change amount reporting method is an asynchronous reporting method.

6. The method for monitoring low voltage distributed power supply based on event message according to claim 1, characterized in that: The method also includes performing real-time analysis on the data changes reported by the monitoring device, checking whether an abnormal situation exceeding a preset threshold occurs, and taking corresponding response measures.

7. A method for monitoring low voltage distributed power supply based on event message according to claim 2 or 6, characterized in that: The preset threshold value includes a voltage threshold range of 210V to 240V, and the total active power is not greater than the actual rated power of the low-voltage distributed power supply.

8. A low-voltage distributed power monitoring system based on event messages, based on a low-voltage distributed power monitoring method based on event messages according to any one of claims 1 to 7, characterized in that: The system includes: Low-voltage area gateway concentrator, low-voltage distributed power monitoring equipment, monitoring software, data storage and management module and communication module; The low-voltage area gateway concentrator is used to obtain the electrical quantity data of each low-voltage distributed power source in batches, and store each batch of electrical quantity data as a set of initial data of the low-voltage distributed power source; The low voltage distributed power supply monitoring equipment is used to collect and upload the electrical quantity data of the low voltage distributed power supply to the monitoring software; The monitoring software is used to receive and process the data changes uploaded by the monitoring equipment, and calculate the current value of the electrical quantity based on the stored initial data, and update the electrical quantity data in real time; The data storage and management module is used to store the initial electrical quantity data, real-time electrical quantity data and historical change data of the low-voltage distributed power supply; The communication module is used to transmit data between various devices.

9. A low voltage distributed power supply monitoring system based on event messages according to claim 8, characterized in that: The system also includes an intelligent analysis and alarm module, which analyzes real-time data, determines whether there are abnormal conditions, and takes corresponding response measures based on the analysis results.

10. The low voltage distributed power supply monitoring system based on event messages according to claim 8, characterized in that: The system also includes a front-end display module, which provides an interface for users to interact with the system, displays real-time and historical electrical quantity data, and supports system management and settings.

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