CN104201780A - Load data collecting, transmitting and analyzing device used for rural power distribution area - Google Patents

Abstract

The invention discloses a load data acquisition, transmission and analysis device for agricultural power distribution station areas, which includes a terminal acquisition unit, a data transmission unit and a background processing unit. The terminal acquisition unit includes a digital electric meter and a data concentrator. The shape distribution is connected with a data concentrator, and the background processing unit includes a microcomputer system and a processing center, and the two are cascaded through the Internet. The microcomputer system includes an analysis module, a memory and a display, and the processing center includes a scheduling module and an early warning module. The invention realizes the collection, transmission and analysis of the load data in the agricultural power distribution station area, has real-time performance, can collect a large amount of power load data, and can store several years of historical data to establish a complete power grid operation parameter database at the same level. Convenience, long service life, maintenance-free and extremely low operating costs, monitor the operation of the meter, and play a complementary role with the meter, it is worthy of widespread promotion and use.

Description

Load data acquisition, transmission and analysis device for rural power distribution station area

technical field

The present invention relates to the technical field of electric load management devices, in particular to a load data collection, transmission and analysis device for agricultural power distribution stations.

Background technique

At present, the planning of power construction, the expansion and expansion of power supply system, the transformation of power distribution system and the deployment of power supply are mainly based on the rough estimation of the experience of experts or technicians at all levels. Due to the lack of detailed power monitoring information, Project construction and renovation adjustments often overlap with actual needs, resulting in insufficient power supply, long-term overloaded operation of the system, or excess power supply, which directly leads to frequent equipment failures and unnecessary economic losses, especially for rural power. The distribution system in the station area has poor load characteristic indicators. The daily valley peak load often varies several times, and the annual maximum valley peak load even differs by more than ten times, which brings great difficulties to power distribution management and equipment operation management. Therefore, it is necessary to have a A device or system that can realize the collection, transmission and analysis of load data in rural power distribution stations.

The utility model patent with the application number 201120194102.3 relates to a distribution network data collection and communication device, including a feeder terminal device or a data transmission unit, and a wireless network user terminal. Between them, a multi-interface switch is connected, multiple feeder terminal devices or data transmission units are connected to multiple interfaces of the switch, and the switch is connected to a wireless network user terminal. The present invention can realize the connection between a wireless network user terminal and multiple feeder terminal devices or data transmission units through the multi-interface switch, so that one CPE can provide wireless communication channels for multiple FTUs or DTUs at the same time, thereby greatly saving the number of base station user access , Reduce the workload of the base station and save the investment in base station construction.

The invention patent with application number 201010268772.5 provides a unified data acquisition and monitoring system for medium and low voltage distribution networks, including intelligent acquisition terminals, data communication and transmission systems, real-time data processing modules, data interface service modules, user electricity information management and Monitoring module, intelligent distribution station area management and monitoring module, intelligent collection terminal collects real-time information such as user power consumption information and distribution station operation and status, and sends it to the real-time data processing module through the data communication and transmission network system. Unified management in the /historical database, real-time/historical data will provide real-time comprehensive data support for the user's power consumption information management and monitoring module, intelligent distribution station area management and monitoring module, and other related application systems through the data interface service module according to requirements , through the real-time collection and analysis of the operation information and status parameters of power users and distribution stations, the intelligent distribution stations can be included in the self-healing control and economic operation of medium and low voltage distribution networks, and real-time load analysis, Real-time electricity price management, realizing demand-side response and other interactive application functions.

The invention patent with the application number of 200510077651.1 discloses an automatic monitoring device for low-voltage distribution network in rural areas, including an upper management computer and a lower computer. -Voltage sampling unit, relay unit, distribution transformer state detection unit and power supply circuit, the use of this device can not only realize remote monitoring of the operation status of the rural low-voltage distribution network, but also be suitable for load monitoring of power users and monitoring.

The purpose of the above systems or devices is to improve the collection, communication and real-time monitoring of distribution network data. However, in order to better achieve high-quality power services and improve customer satisfaction, it is best to combine power grid data collection with data analysis and management, and form a A station area network system obtains comprehensive beneficial effects.

Contents of the invention

The purpose of the present invention is to provide a load data collection, transmission and analysis device for the agricultural power distribution station area. Through the collection and real-time transmission of the load data information of the station area, on the one hand, it can prevent equipment from being damaged due to overload or under-load. On the one hand, it can analyze the data, participate in and assist in the formulation of the optimal service plan, improve the operation efficiency of the power grid in the station area, and improve user satisfaction.

In order to achieve the above object, the technical solution adopted by the present invention is: a load data acquisition, transmission and analysis device for the agricultural power distribution station area, including a terminal acquisition unit, a data transmission unit and a background processing unit, and the terminal acquisition unit includes a digital electric meter and Data concentrator, several digital electric meters are distributed in a star shape and connected to a data concentrator.

The data transmission unit is respectively connected with the terminal acquisition unit and the background processing unit through dedicated signal ports.

The terminal collection unit realizes remote wireless connection with the background processing unit through the data transmission unit.

The data transmission unit includes a radio transceiver station, and several data concentrators are distributed in a longitudinal network and connected to one radio transceiver station.

The digital electric meter is a single-phase carrier meter and/or a three-phase four-wire carrier meter.

The background processing unit includes a microcomputer system and a processing center, both of which are cascaded through the Internet.

The microcomputer system includes an analysis module, a memory and a display, and the processing center includes a scheduling module and an early warning module.

The dispatching module is a power dispatching system, and the early warning module includes a basic data collection early warning module, a line overload online early warning module, a station area overload early warning module, a voltage current and three-phase unbalance early warning module, an anti-electricity theft early warning module and Line loss abnormal warning module.

The present invention sends the power load data to the processing module after collecting the power load data of each period in the control area, and the processing module processes the predicted power load data, and sends a corresponding response to the control module according to the data processing result Control signal, for example, when the electric load is predicted to increase, the dispatching system sends a control signal to increase the output power, and when the electric load is predicted to decrease, the dispatching system sends a control signal to reduce the output power, so as to realize the control of the power generation equipment The output power is controlled to avoid problems such as a large amount of power that cannot be used and wasted due to dispatch delays, or power shortages when power peaks cannot be achieved.

The prerequisite for the realization of the invention lies in the collection of load data in the rural power distribution station area, which adopts a divergent network topology, that is, a number of digital electric meters are distributed in a star shape and connected to a data concentrator. In this case, select any one or combination of single-phase carrier meter and/or three-phase four-wire carrier meter. When the data transmission unit adopts wireless mode, the end of the data concentrator should be connected to the wireless transmission module interconnected with the radio transceiver station, such as GSM transmitter; when the data transmission unit adopts non-wireless transmission mode, each concentrator and the background processing unit are connected with a dedicated signal port.

The core of the present invention lies in the application of load data, including the analysis process and processing process after data transmission, which are respectively realized by the microcomputer system and the processing center in the background processing unit, and the two are cascaded through the Internet, wherein the microcomputer system includes The analysis module, memory and display, on the one hand, the analysis module realizes the comparison between the collected data and the standard data by calling the original standard data in the memory, and calculates whether there is a large deviation, and on the other hand, merges the current data , including the generation of data reports and 3D graphs. The generation of data reports is based on the method of recalling the measured time and listing the measured data in a time-sharing manner on a table; the 3D graph is the current, voltage , electric energy, and power factor are all represented by the 3D curve of the colored broken line, which shows the macroscopic curve of the database storage time, and marks the inflection point value with the quantitative number at that time; The year is the unit of transfer, and there are time records for the maximum peak values such as current, voltage, electric energy, and power factor that occurred during the period, and there are time records for power failure and phase loss; the display is the data type, Reports, graphics and deviation analysis results are displayed in real time to facilitate real-time monitoring by staff.

The processing center includes a scheduling module and an early warning module. The scheduling module is a power dispatching system, which is generally used when there is a large overall deviation, while the early warning module mainly realizes alarm processing. , electronic map, and mobile phone alarm to remind the duty officer and the person in charge of the area. The types of early warning include basic data collection early warning, line overload online early warning, station area overload early warning, voltage current and three-phase unbalance early warning, anti-stealing early warning and Line loss abnormal warning and other parts.

In the present invention, the load data collection and transmission analysis device, on the one hand, collects the historical statistical data of the control area, and obtains information such as the maximum load, minimum load, average load, load variation coefficient, etc. in the past several forecast periods, so that according to the above The information predicts the power load in each period of the next cycle, and by collecting the basic data of node users, evaluating the impact of these data factors on the power load, and making a trend analysis of the power load.

The invention realizes the collection, transmission and analysis of load data that can be used in the agricultural power distribution station area, has real-time performance, can collect a large amount of power load data, and can store several years of historical data to establish complete operating parameters of the power grid at the same level The database provides a reliable basis for power grid construction and safety. Based on these data, predictive work can be carried out in advance, and the power consumption analysis of the power supply link can be used to provide the line loss of the power supply link, providing a basis for reducing line loss. According to the management needs, the power consumption of users in the local power supply area is calculated to reduce the loss of power supply billing. The invention is convenient to operate, has a long service life, is maintenance-free and has extremely low operating costs. It can also monitor the operation of the electric meter and play a role with the electric meter. Complementary to each other, its comprehensive application makes the collected data more accurate.

Description of drawings

Fig. 1 is a system structure diagram of the present invention.

Detailed ways

Embodiment one

As shown in Figure 1, the load data acquisition, transmission and analysis device used in the rural power distribution station area includes a terminal acquisition unit, a data transmission unit 3 and a background processing unit. The terminal acquisition unit includes a digital electric meter 1 and a data concentrator 2. The electric meter 1 is connected to a data concentrator 2 in a star-shaped distribution.

The data transmission unit 3 is respectively connected with the terminal acquisition unit and the background processing unit to realize special signal ports; the digital electric meter is a single-phase carrier meter; the background processing unit includes a microcomputer system 4 and a processing center 5, which are cascaded through the Internet.

The microcomputer system includes an analysis module 6, a memory 7 and a display 8. The processing center includes a scheduling module 9 and an early warning module; An overload early warning module 12 , a voltage, current and three-phase unbalance early warning module 13 , an anti-electricity theft early warning module 14 and an abnormal line loss early warning module 15 .

Because it is for the data station area of each entity, after the load data enters the analysis module, it can rely on the GIS system for data collection in the early stage. The application method of the system GIS on this device is to integrate the power equipment, substations, transmission The distribution network, power users and core businesses such as power load and production and management are connected to form a comprehensive information system for power informatization production management. It provides power equipment and facility information, power grid operation status information, power technology information, production management information, power market information and mountains, rivers, terrain, towns, roads, streets, buildings, and natural environments such as meteorology, hydrology, geology, and resources. The information is concentrated in the unified system, and relevant data, pictures, images, maps, technical data, management knowledge, etc. can be queried through GIS, which is more convenient for the overall network management.

The following is a description of the process with an analysis period: taking the sampling period of 12 hours as an example, the sampling data includes the power load data collected in 12 hours, including power supply E ₁ , maximum load power consumption E ₂ , minimum load power consumption E ₃ and line loss power P ₀ , assuming that the power supply E ₁ is a stable supply in the sampling period, then the average load parameters, as well as the maximum and minimum values of the average load limit can be calculated according to the power parameters, and the period is used The ratio of electricity to time is the average load, and the average load parameters within 12 hours are: average power supply load P ₁ =E ₁ /12, power load at maximum load P ₂ =E ₂ /12, minimum load at Electric load P ₃ =E ₃ /12, then calculate the maximum value and minimum value respectively to determine the adjustment range of the power grid dispatching system, then the maximum value P _MAX =K ₁ *(P ₁ -P ₃ +P ₀ ), the minimum value P _MIN =K ₂ *(P ₁ -P ₂ ), where K ₁ and K ₂ are coefficients related to the rated carrying capacity of the power supply system; /IP protocol, which is transmitted to the dispatching system through the optical fiber Ethernet network, and the subsequent data delivery process also uses this method to realize the interconnection and exchange of data.

After the analysis process is over, it enters the processing process. After the dispatching system receives the load parameter data, it puts the data into the overall operation requirements of the power grid as a parameter. Adjust the load value P _C and send it periodically through the optical fiber network. The sending cycle can be set to 2 hours.

The dispatching module is the power dispatching system. The system calculates the total load deviation value P ^' according to the adjusted load value. The total load deviation value P ^' is the difference between the maximum power supply load P ₄ , the extreme load P ₅ , and the adjusted load P _C. That is, P ^' =P ₄ -P ₅ +P _C , and the load correction value is calculated according to the load cost function F F*P ^' , on the premise of satisfying the load deviation correction, according to the principle of the optimal ratio of cost and cost, determine the most Optimal adjustment and correction scheme; the early warning module mainly implements alarm processing. For the measured data exceeding the warning value, it can prompt the duty officer and the person in charge of the area in the form of sound, text, electronic map, and mobile phone alarm. The types of early warning include basic data collection early warning , Line overload online warning, station area overload warning, voltage and current and three-phase unbalance warning, anti-theft warning and line loss abnormal warning and other parts.

Embodiment two

As shown in Figure 1, the load data acquisition, transmission and analysis device used in the agricultural power distribution station area is different from the first embodiment in that the terminal acquisition unit and the background processing unit realize remote wireless connection through the data transmission unit; the data transmission unit Including a radio transceiver station, several data concentrators are distributed in a vertical line network and connected with a radio transceiver station.

Taking the sampling period of 8 hours as an example, the sampling data includes the power load data collected in 8 hours, including power supply E ₁ , maximum load power consumption E ₂ , minimum load power consumption E ₃ and line loss power P ₀ , Assuming that the power supply E ₁ is a stable supply within the sampling period, the average load parameters and the maximum and minimum values of the average load limit can be calculated according to the power parameters, and the ratio of cycle power consumption to time is the average load , then the average load parameters within 8 hours are: average power supply load P ₁ =E ₁ /8, power load at maximum load P ₂ =E ₂ /8, power load at minimum load P ₃ =E ₃ /8 , and then calculate the maximum value and minimum value respectively to determine the adjustment range of the power grid dispatching system, then the maximum value P _MAX =K ₁ *(P ₁ -P ₃ +P ₀ ), the minimum value P _MIN =K ₂ *(P ₁ -P ₂ ), where K ₁ and K ₂ are coefficients related to the rated carrying capacity of the power supply system; after calculating and obtaining various relevant data, the data to be uploaded adopts TCP/IP protocol and is transmitted to The scheduling system and the subsequent data delivery process also use this method to realize the interconnection and exchange of data.

After the analysis process is over, it enters the processing process. After the dispatching system receives the load parameter data, it puts the data into the overall operation requirements of the power grid as a parameter. Adjust the load value P _C and send it periodically through the optical fiber network. The sending cycle can be set to 1.5 hours.

Embodiment Three

As shown in Figure 1, the load data collection, transmission and analysis device used in the rural power distribution station area is different from the first or second embodiment in that the digital electric meter uses a three-phase four-wire carrier meter.

Taking the sampling period of 4 hours as an example, the sampling data includes the power load data collected in 4 hours, including power supply E ₁ , maximum load power consumption E ₂ , minimum load power consumption E ₃ and line loss power P ₀ , Assuming that the power supply E ₁ is a stable supply within the sampling period, the average load parameters and the maximum and minimum values of the average load limit can be calculated according to the power parameters, and the ratio of cycle power consumption to time is the average load , then the average load parameters within 4 hours are: average power supply load P ₁ =E ₁ /4, power load at maximum load P ₂ =E ₂ /4, power load at minimum load P ₃ =E ₃ /4 , and then calculate the maximum value and minimum value respectively to determine the adjustment range of the power grid dispatching system, then the maximum value P _MAX =K ₁ *(P ₁ -P ₃ +P ₀ ), the minimum value P _MIN =K ₂ *(P ₁ -P ₂ ), where K ₁ and K ₂ are coefficients related to the rated carrying capacity of the power supply system; after calculating and obtaining various relevant data, the data to be uploaded adopts TCP/IP protocol and is transmitted to The scheduling system and the subsequent data delivery process also use this method to realize the interconnection and exchange of data.

After the analysis process is over, it enters the processing process. After the dispatching system receives the load parameter data, it puts the data into the overall operation requirements of the power grid as a parameter. Adjust the load value P _C and send it periodically through the optical fiber network, and the sending cycle can be set to 1 hour.

Claims (8)

1. gather transimiison analysis device for the load data in rural power dispensing table district, it is characterized in that: comprise terminal collecting unit, data transmission unit and background processing unit, described terminal collecting unit comprises digitlization ammeter and data concentrator, and some digitlization ammeters are star distribution and are connected with a data concentrator.

2. the load data for rural power dispensing table district as claimed in claim 1 gathers transimiison analysis device, it is characterized in that: described data transmission unit is realized the docking of special signal port with described terminal collecting unit, described background processing unit respectively.

3. the load data for rural power dispensing table district as claimed in claim 1 gathers transimiison analysis device, it is characterized in that: described terminal collecting unit is realized long distance wireless with described background processing unit by described data transmission unit and is connected.

4. the load data for rural power dispensing table district as claimed in claim 3 gathers transimiison analysis device, it is characterized in that: described data transmission unit comprises transceiving radio station, some described data concentrators are the distribution of ordinate net and are connected with a described transceiving radio station.

5. gather transimiison analysis device for the load data in rural power dispensing table district as claimed in claim 2 or claim 3, it is characterized in that: described digitlization ammeter is single-phase carrier wave meter and/or three-phase and four-line carrier wave meter.

6. gather transimiison analysis device for the load data in rural power dispensing table district as claimed in claim 2 or claim 3, it is characterized in that: described background processing unit comprises microsystem and processing center, and both realize cascade by internet.

7. the load data for rural power dispensing table district as claimed in claim 6 gathers transimiison analysis device, it is characterized in that: described microsystem comprises analysis module, memory and display, and described processing center comprises scheduler module and warning module.

8. the load data for rural power dispensing table district as claimed in claim 7 gathers transimiison analysis device, it is characterized in that: described scheduler module is electric power dispatching system, described warning module comprises basic data acquisition warning module, the online warning module of circuit overload, platform district overload early-warning module, electric current and voltage and three-phase imbalance warning module, anti-electricity-theft warning module and line loss abnormity early warning module.