CN112730950A - Low-voltage power grid voltage monitoring data layered processing system and method - Google Patents

Abstract

The invention discloses a system and a method for layered processing of voltage monitoring data of a low-voltage power grid, wherein the system comprises: the electric energy meter comprises an electric energy meter, a transformer area terminal, a metering main station and a voltage monitoring system, wherein the output end of the electric energy meter is electrically connected with the input end of the transformer area terminal, the transformer area terminal is in communication connection with the metering main station, and the metering main station is in communication connection with the voltage monitoring system. The invention constructs a low-voltage power grid voltage monitoring data layered processing system by using the electric energy meter, the platform area terminal, the metering master station and the voltage monitoring system, can contain more monitoring points through a layered system structure, and simultaneously carries out edge processing on data by using the platform area terminal, thereby avoiding direct uploading of the data, reducing the flow pressure of the metering master station and saving the calculation and storage resources of the voltage monitoring system.

Description

Low-voltage power grid voltage monitoring data layered processing system and method

Technical Field

The invention relates to the technical field of low-voltage power grids, in particular to a system and a method for processing voltage monitoring data of a low-voltage power grid in a layered mode.

Background

With the development of social economy, the requirements of power supply and utilization on the quality of power are increasingly raised by power utilization customers of various industries and residents, and the power supply and utilization level of power enterprises is also increasingly strictly regulated by power supervision departments. The method can comprehensively and accurately monitor the voltage quality of the low-voltage power grid, timely treat and modify the lines with the voltage qualification rate not meeting the requirements, is an important work of the current power supply and distribution departments of power enterprises, and is also an important challenge.

At present, a perfect voltage qualification rate management system is not established in many power enterprises, the full coverage and typicality of monitoring points cannot be ensured, and accurate technical data cannot be provided for mastering the actual condition of the voltage quality of a low-voltage network. The first scheme is that one transformer is selected from every hundred distribution transformers, two places are selected for the head end and the tail end of a transformer area to install a voltage monitor, and monitoring data of the voltage monitor is directly transmitted to a voltage monitoring master station system through a wireless network; the second scheme is that 20 low-voltage user electric energy meters are selected in each power distribution station area, voltage monitoring data of the electric energy meters are transmitted to the metering automation master station through the concentrator, and the metering master station forwards the data to the voltage monitoring system. The first scheme has the obvious defects that the number of monitoring points is too small, and the voltage quality condition of each power distribution station area cannot be mastered and analyzed at all; compared with the first scheme, the two schemes are slightly improved, the voltage quality condition of each distribution area can be preliminarily reflected by the voltage monitoring data of 20 points of each distribution area, but as one area is less, and more than one hundred users are more, the voltage quality condition of the power grid and the users still needs to be accurately mastered, and the full monitoring is still needed. However, the second scheme is to transmit the voltage monitoring data by using a channel of the low-voltage electric energy metering and reading network, but on one hand, the low-voltage electric energy metering and reading network generally adopts a power line carrier technology, so that the bandwidth is limited, and on the other hand, the transmission of the low-voltage electric energy metering data must be preferentially ensured in the limited bandwidth, so that the current network cannot bear the full amount of voltage monitoring data; in addition, if all the voltage monitoring data are sent to the voltage monitoring system for calculation, a great amount of calculation and storage resources are consumed every day.

In the prior art, a Chinese invention with a publication number of CN106557991A is specially beneficial, and a voltage monitoring data platform is disclosed in 2017, 4 and 5.s.a.the platform comprises a voltage monitoring system, a big data platform and a relational database, wherein the big data platform is used for collecting voltage data of a metering automation system, a dispatching automation system and a voltage detector and transmitting the voltage data to the voltage monitoring system for processing through corresponding interfaces; the relational database is used for acquiring relational data between the voltage of the power marketing system, the distribution network production system, the distribution network GIS platform and the data resource system and other parameters and transmitting the relational data to the voltage monitoring system through corresponding interfaces; and the voltage monitoring system monitors and evaluates the voltage according to the data transmitted by the big data platform and the relational database. Although the scheme can realize the monitoring of the voltage, the structure is complex and the cost is high.

Disclosure of Invention

The invention provides a system and a method for processing low-voltage power grid voltage monitoring data in a layered mode, aiming at overcoming the defects that the voltage quality of each distribution area cannot be monitored and the full monitoring needs to consume great calculation and storage resources in the prior art.

The primary objective of the present invention is to solve the above technical problems, and the technical solution of the present invention is as follows:

the invention provides a hierarchical processing system for voltage monitoring data of a low-voltage power grid, which comprises: the electric energy meter comprises an electric energy meter, a transformer area terminal, a metering main station and a voltage monitoring system, wherein the output end of the electric energy meter is electrically connected with the input end of the transformer area terminal, the transformer area terminal is in communication connection with the metering main station, and the metering main station is in communication connection with the voltage monitoring system.

Further, the station area terminal and the metering master station are in wireless communication connection.

Furthermore, the distribution room terminal is connected with a plurality of electric energy meters.

Further, the station area terminal includes: the system comprises a reading module, a data edge processing module and a wireless data transmission module, wherein the reading module is used for reading voltage monitoring data of the electric energy meter in the transformer area, the data edge processing module is used for carrying out statistical analysis on the voltage monitoring data and calculating the voltage qualification rate of the transformer area, and the wireless data transmission module is used for transmitting the voltage qualification rate to a metering master station.

Further, the voltage monitoring system comprises: and the regional processing module is used for analyzing and processing the data sent by the metering master station.

The invention provides a low-voltage power grid voltage monitoring data layered processing method, which comprises the following steps:

s1: carrying out voltage monitoring data layered processing strategy configuration on a distribution room terminal and a voltage monitoring system in a target area;

s2: the method comprises the steps that a platform area terminal obtains voltage monitoring curve data of an electric energy meter in a platform area where the platform area terminal is located, and the platform area terminal conducts edge statistical processing on the voltage data of the electric energy meter according to a preset layered processing strategy;

s3: the terminal of the transformer area sends the edge statistical processing result to a metering master station;

s4: the metering master station identifies the data frame of the received edge statistical processing result, and directly forwards the edge statistical processing result to the voltage monitoring system if the edge statistical processing result is not required to be stored in a metering master station database;

s5: and the voltage monitoring system receives the edge processing result of the voltage monitoring data of the transformer area, performs data statistics processing in the target area and generates a voltage qualification rate statistical result of the target area.

Further, the voltage monitoring curve data comprises at least one data point per hour and 24 data points per day.

Further, the edge statistical processing in step S3 is to calculate the daily voltage yield of the distribution room, and the daily voltage yield calculation formula of the distribution room is as follows:

wherein alpha represents the daily voltage qualification rate of the power distribution area, M represents the sum of the point numbers of all the point voltage data of all the electric meters in the power distribution area between 198V and 235.4V, and n is the number of the electric meters in the power distribution area.

Further, the edge processing in step S5 is to calculate the daily voltage qualified rate of the average distribution area in the target area, where the daily voltage qualified rate of the average distribution area in the target area is calculated by the following formula:

wherein, beta represents the daily voltage qualified rate of the average transformer area in the target area, A represents the sum of the daily voltage qualified rates of all the transformer areas in the target area, and m represents the number of the transformer areas.

Further, the dividing into processing policy configurations comprises: the method comprises the following steps of configuring a range of a layered processing object, configuring a range of a layered processing aging range and configuring a layered processing algorithm, wherein the range of the layered processing object, namely the range of an electric meter which is determined by parameter configuration, comprises the following steps: the method comprises the steps that electric meters in the whole region, all electric meters under a specific branch, all electric meters in a phase splitting sequence and other characteristic electric meters are gathered;

the time range configuration of the layering treatment, namely the effective time period of the layering treatment, comprises the following steps: long-term effectiveness, effectiveness within a specific date range, and effectiveness when used;

the hierarchical processing algorithm configuration comprises: a daily voltage qualification rate calculation algorithm of the transformer area and a daily voltage qualification rate calculation algorithm of the average transformer area.

Compared with the prior art, the technical scheme of the invention has the beneficial effects that:

the invention constructs a low-voltage power grid voltage monitoring data layered processing system by using the electric energy meter, the platform area terminal, the metering master station and the voltage monitoring system, can contain more monitoring points through a layered system structure, and simultaneously carries out edge processing on data by using the platform area terminal, thereby avoiding direct uploading of the data, reducing the flow pressure of the metering master station and saving the calculation and storage resources of the voltage monitoring system.

Drawings

Fig. 1 is a block diagram of a hierarchical processing system for voltage monitoring data of a low-voltage power grid according to the present invention.

Fig. 2 is a flow chart of a method for processing voltage monitoring data of a low-voltage power grid in a layered manner according to the invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Example 1

As shown in fig. 1, a first aspect of the present invention provides a hierarchical processing system for low-voltage grid voltage monitoring data, including: the electric energy meter comprises an electric energy meter, a transformer area terminal, a metering main station and a voltage monitoring system, wherein the output end of the electric energy meter is electrically connected with the input end of the transformer area terminal, the transformer area terminal is in communication connection with the metering main station, and the metering main station is in communication connection with the voltage monitoring system.

Further, the station area terminal and the metering master station are in wireless communication connection.

Furthermore, the distribution room terminal is connected with a plurality of electric energy meters.

Further, the station area terminal includes: the system comprises a reading module, a data edge processing module and a wireless data transmission module, wherein the reading module is used for reading voltage monitoring data of the electric energy meter in the transformer area, the data edge processing module is used for carrying out statistical analysis on the voltage monitoring data and calculating the voltage qualification rate of the transformer area, and the wireless data transmission module is used for transmitting the voltage qualification rate to a metering master station.

Further, the voltage monitoring system comprises: and the regional processing module is used for analyzing and processing the data sent by the metering master station. It should be noted that, in the present application, no limitation is imposed on a specific algorithm implemented by the data edge processing module and the area processing module.

Based on the system, the invention provides a low-voltage power grid voltage monitoring data layered processing method in a second aspect, which comprises the following steps:

s1: carrying out voltage monitoring data layered processing strategy configuration on a distribution room terminal and a voltage monitoring system in a target area;

more specifically, the split processing policy configuration includes: .

S2: the method comprises the steps that a platform area terminal obtains voltage monitoring curve data of an electric energy meter in a platform area where the platform area terminal is located, the platform area terminal conducts edge statistical processing on the voltage data of the electric energy meter according to a preset layered processing strategy, and more specifically, the voltage monitoring curve data at least comprise one data point per hour and 24 data points per day.

In one specific embodiment, the voltage monitoring curve data may be 4 data points per hour for a total of 96 data points per day. Performing edge statistical processing on the voltage data of the electric energy meter to calculate the daily voltage qualification rate of the transformer area, wherein the daily voltage qualification rate calculation formula of the transformer area is as follows:

wherein alpha represents the daily voltage qualification rate of the power distribution area, M represents the sum of the point numbers of all the point voltage data of all the electric meters in the power distribution area between 198V and 235.4V, and n is the number of the electric meters in the power distribution area.

S3: the terminal of the transformer area sends the edge statistical processing result to a metering master station;

s4: the metering master station identifies the data frame of the received edge statistical processing result, and directly forwards the edge statistical processing result to the voltage monitoring system if the edge statistical processing result does not need to be put in a warehouse;

s5: the voltage monitoring system receives the station area voltage monitoring data edge processing result, performs data statistics processing in the target area, and generates a target area voltage qualification rate statistical result, the edge processing in step S5 is to calculate an average station area daily voltage qualification rate in the target area, and the calculation formula of the average station area daily voltage qualification rate in the target area is as follows:

wherein, beta represents the daily voltage qualified rate of the average transformer area in the target area, A represents the sum of the daily voltage qualified rates of all the transformer areas in the target area, and m represents the number of the transformer areas.

The method comprises the following steps of configuring a range of a layered processing object, configuring a range of a layered processing aging range and configuring a layered processing algorithm, wherein the range of the layered processing object, namely the range of an electric meter which is determined by parameter configuration, comprises the following steps: the method comprises the steps that electric meters in the whole region, all electric meters under a specific branch, all electric meters in a phase splitting sequence and other characteristic electric meters are gathered;

the time range configuration of the layering treatment, namely the effective time period of the layering treatment, comprises the following steps: long-term effectiveness, effectiveness within a specific date range, and effectiveness when used;

the hierarchical processing algorithm configuration comprises: a daily voltage qualification rate calculation algorithm of the transformer area and a daily voltage qualification rate calculation algorithm of the average transformer area.

The two examples of the daily voltage qualification rate of the cell and the daily voltage qualification rate of the average cell in the scheme are only examples, and other indexes of voltage monitoring can be calculated according to actual requirements, or not only voltage monitoring is performed, but also other applications can use the technical scheme of layered processing, so that the aims of saving network flow and the calculation and storage capacity of a main station are fulfilled.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A hierarchical processing system of low-voltage power grid voltage monitoring data is characterized by comprising: the electric energy meter comprises an electric energy meter, a transformer area terminal, a metering main station and a voltage monitoring system, wherein the output end of the electric energy meter is electrically connected with the input end of the transformer area terminal, the transformer area terminal is in communication connection with the metering main station, and the metering main station is in communication connection with the voltage monitoring system.

2. The system for layered processing of voltage monitoring data of a low-voltage power grid according to claim 1, wherein the platform terminal and the metering master station are in wireless communication connection.

3. The system according to claim 1, wherein the platform terminal is connected to a plurality of electric energy meters.

4. The system of claim 1, wherein the platform terminal comprises: the system comprises a reading module, a data edge processing module and a wireless data transmission module, wherein the reading module is used for reading voltage monitoring data of the electric energy meter in the transformer area, the data edge processing module is used for carrying out statistical analysis on the voltage monitoring data and calculating the voltage qualification rate of the transformer area, and the wireless data transmission module is used for transmitting the voltage qualification rate to a metering master station.

5. The system for layered processing of low-voltage power grid voltage monitoring data according to claim 1, wherein the voltage monitoring system comprises: and the regional processing module is used for analyzing and processing the data sent by the metering master station.

6. A low-voltage power grid voltage monitoring data layered processing method is characterized by comprising the following steps:

s1: carrying out voltage monitoring data layered processing strategy configuration on a distribution room terminal and a voltage monitoring system in a target area;

s2: the method comprises the steps that a platform area terminal obtains voltage monitoring curve data of an electric energy meter in a platform area where the platform area terminal is located, and the platform area terminal conducts edge statistical processing on the voltage data of the electric energy meter according to a preset layered processing strategy;

s3: the terminal of the transformer area sends the edge statistical processing result to a metering master station;

s4: the metering master station performs data frame identification on the received edge statistical processing result, and directly forwards the edge statistical processing result to the voltage monitoring system if the edge statistical processing result is not required to be stored in a metering master station database;

s5: and the voltage monitoring system receives the edge processing result of the voltage monitoring data of the transformer area, performs data statistics processing in the target area and generates a voltage qualification rate statistical result of the target area.

7. The hierarchical processing method for the low-voltage power grid voltage monitoring data according to claim 6, characterized in that the voltage monitoring curve data at least comprises one data point per hour and 24 data points per day.

8. The method for hierarchically processing the voltage monitoring data of the low-voltage power grid as claimed in claim 6, wherein the edge statistical processing in step S3 is to calculate a daily voltage qualification rate of the distribution room, and the daily voltage qualification rate calculation formula of the distribution room is as follows:

wherein alpha represents the daily voltage qualification rate of the power distribution area, M represents the sum of the point numbers of all the point voltage data of all the electric meters in the power distribution area between 198V and 235.4V, and n is the number of the electric meters in the power distribution area.

9. The method for hierarchically processing the voltage monitoring data of the low-voltage power grid as claimed in claim 6, wherein the edge processing in step S5 is to calculate an average distribution area daily voltage qualification rate in the target area, and the calculation formula of the average distribution area daily voltage qualification rate in the target area is as follows:

wherein, beta represents the daily voltage qualified rate of the average transformer area in the target area, A represents the sum of the daily voltage qualified rates of all the transformer areas in the target area, and m represents the number of the transformer areas.

10. The method for hierarchically processing the low-voltage power grid voltage monitoring data according to claim 6, wherein the hierarchically processing strategy configuration comprises: the method comprises the following steps of configuring a range of a layered processing object, configuring a range of a layered processing aging range and configuring a layered processing algorithm, wherein the range of the layered processing object, namely the range of an electric meter which is determined by parameter configuration, comprises the following steps: the method comprises the steps that electric meters in the whole region, all electric meters under a specific branch, all electric meters in a phase splitting sequence and other characteristic electric meters are gathered;

the time range configuration of the layering treatment, namely the effective time period of the layering treatment, comprises the following steps: long-term effectiveness, effectiveness within a specific date range, and effectiveness when used;

the hierarchical processing algorithm configuration comprises: a daily voltage qualification rate calculation algorithm of the transformer area and a daily voltage qualification rate calculation algorithm of the average transformer area.

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