CN101697497A - Multifunctional electrical energy information concentrator and communication method thereof - Google Patents

Abstract

The invention relates to a multifunctional electric energy information concentrator and a communication method thereof. The multifunctional electric energy information concentrator comprises a data processing module, a communication MCU module, a board band carrier module, a high-speed narrow band carrier module, a 2.4G wireless module and a 470M wireless module, wherein the board band carrier module, the high-speed narrow band carrier module, the 2.4G wireless module and the 470M wireless module are connected with the communication MCU module. The communication mode of the concentrator supports a carrier and a wireless communication channel at the same time; the carrier can be one of the board band carrier or the high-speed narrow band carrier; the wireless can be one of the 2.4G or 470M; one of the carrier or the wireless is appointed as a main channel, and the other is appointed as a standby channel. Two channels of totally different characteristics are used for transmitting data so as to play the respective advantage of the two channels, and greatly improve the robustness, the reliability and the real-time of meter reading data transmission.

Description

A multifunctional electric energy information concentrator and its communication method

technical field

The invention relates to a two-in-one concentrator with distribution transformer monitoring function, which conforms to the latest DL/T 698 protocol standard, can use Ethernet for remote communication, collects three-phase low-voltage power information, and can use dual channels ( Power carrier channel and wireless channel) to collect the electricity consumption information of all the meters under the table.

Background technique

According to the overall goal of the "Eleventh Five-Year" Power Marketing Development Plan of the State Grid Corporation, the level of marketing modernization and measurement standardization has been rapidly improved. In order to improve the level of rapid market response and improve the quality of customer service, "lean management" "Requirements, and gradually establish a marketing mechanism that adapts to market changes and quickly reflects customer needs. It must realize real-time collection and monitoring of electricity consumption information by power users, and effectively serve marketing management and various business needs. The electricity consumption information collection system realizes the online monitoring of metering devices and the real-time collection of important information such as user load, electricity, voltage, etc., and provides basic data for the "SG186" information system in a timely, complete and accurate manner, so as to analyze all aspects of enterprise operation and management , provide support for decision-making, and improve the level of enterprise intensification, leanness and standardized management.

At present, there are various power information collection concentrators on the market, and the commonly used transmission channels of concentrators are narrowband carrier type, broadband carrier type, and wireless type. But each has its own disadvantages: the narrowband carrier type has small attenuation and long transmission distance, but the rate is low, and it is difficult to realize dynamic routing, so the above-mentioned meter reading success rate requirements cannot be achieved; the broadband carrier rate is high, and dynamic routing can be realized. Routing, automatic relay, but the transmission attenuation is fast, the distance is short, and the islanding effect is caused by the large load, so the above success rate requirements cannot be achieved; the wireless type in a small area is greatly affected by the environment, and occlusion and weather conditions will affect the performance of the device Therefore, the above-mentioned success rate requirements cannot be achieved.

Currently used power carrier communication and wireless communication are affected by site conditions in actual sites. The power carrier is mainly affected by time. Due to the uncertainty of the load, the interference to the power grid is different in different time periods. Therefore, at different times, the power carrier communication effect is different, sometimes it is connected, sometimes it is not; wireless data The transmission is mainly affected by the geographical environment. Blocking and shielding will seriously affect the effect of data communication, and on-site construction is very difficult.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the existing electric power information collection terminals, and provide a multifunctional concentrator and its communication method in compliance with the DLT 698 standard.

The purpose of the present invention is achieved through the following technical solutions:

The multifunctional electric energy information concentrator includes a data processing module and a communication MCU module, and the communication MCU module communicates with the data processing module, and is characterized in that it also includes a broadband carrier module, a high-speed narrowband carrier module, a 2.4G wireless module and a 470M wireless module, The broadband carrier module, the high-speed narrowband carrier module, the 2.4G wireless module and the 470M wireless module are all in communication connection with the communication MCU module.

Further, in the above-mentioned multi-functional electric energy information concentrator, wherein, the communication MCU module is connected to the data processing module through a TTL-level RS232 and SPI interface, and the communication MCU module and the data processing module simultaneously support standard DL/T 645 and 698.42 agreements;

The broadband carrier module is connected to the communication MCU module through an SPI interface or an Ethernet port, and the data transmission adopts a full-duplex mode;

The high-speed narrowband carrier module is connected to the communication MCU module through the TTL level RS232 port or SPI port, and the data transmission adopts full-duplex mode;

The 2.4G wireless module is connected to the communication MCU module through the SPI port, and the data transmission adopts full-duplex mode;

The 470M wireless module is connected with the communication MCU module through the SPI port, and the data transmission adopts the full-duplex mode.

Further, in the above-mentioned multifunctional electric energy information concentrator, wherein, the data processing module adopts a chip with a model of ARM 7, the communication MCU module adopts a chip with a model of ARM Cortex M3, and the broadband carrier module adopts a chip with a model of INTELLON 5500x chip, the high-speed narrowband carrier module adopts the chip model MAX 2990, the 2.4G wireless module adopts the chip model MC13192, and the 470M wireless module adopts the chip model CC1100E.

The communication method of the multifunctional electric energy information concentrator of the present invention is characterized in that the data collected is processed by the data processing module, and the signals output by several electric energy meters or several electric data signals are respectively processed and stored; the data processing module processes The data information is exchanged with the communication MCU module; the communication MCU module and the broadband carrier module form a broadband carrier communication channel, the communication MCU module and the high-speed narrowband carrier module form a high-speed narrowband carrier communication channel, and the communication MCU module and the 2.4G wireless The module forms a 2.4G wireless communication channel, and the communication MCU module and the 470M wireless module form a 470M wireless communication channel; one of the broadband carrier communication channel and the high-speed narrowband carrier communication channel is connected with the 2.4G wireless communication channel and the 470M wireless communication channel. A combination of channels in the wireless communication channel forms a dual channel, any one of the dual channels is set as the main channel, and the other is set as the backup channel; the communication MCU module first communicates with the collector through the main channel, When the main channel fails to communicate successfully, switch to the backup channel; when the main channel recovers, switch back to the backup channel.

Furthermore, the above-mentioned communication method of the multifunctional electric energy information concentrator uses the main channel and the backup channel to perform dual-channel communication according to the following steps:

(S101) The concentrator uses one of the broadband carrier communication channel and the high-speed narrowband carrier communication channel and one of the 2.4G wireless communication channel and the 470M wireless communication channel to work, and any communication channel is configured as the main channel and backup channel;

(S102) The concentrator sends a frame of data through the main channel, waiting for confirmation;

(S103) If the concentrator receives the confirmation, then the transmission is successful, and the transmission ends, otherwise go to (S104);

(S104) If the concentrator does not receive confirmation within the specified time, the concentrator resends the data through the backup channel and waits for confirmation;

(S105) If the concentrator receives the confirmation, the transmission is successful and the transmission ends;

(S106) If the concentrator does not receive an acknowledgment within the specified time, the transmission fails.

Furthermore, the above-mentioned communication method of the multifunctional electric energy information concentrator performs automatic electric meter correspondence, concentrator automatic discovery and electric meter according to the following steps:

(S201) When the concentrator needs to copy a certain ammeter, first check the corresponding table of the collector and the ammeter;

(S202) If there is a corresponding entry in the corresponding table, then take out the corresponding electric meter and receiver information, and the corresponding process ends, otherwise go to step (S203);

(S203) The concentrator sends the whole network broadcast command to all collectors, requiring all collectors to attempt meter reading;

(S204) All collectors in the network carry out a test copy to the ammeter through port 485. If the ammeter is under the corresponding collector, the meter generates response data, and the collector returns corresponding data to the concentrator after receiving the response data;

(S205) After the concentrator receives the electric meter data returned by the collector, it records the corresponding relationship between the corresponding electric meter and the collector in the table item.

The outstanding substantive features and remarkable progress of the technical solution of the present invention are mainly reflected in:

1) The functions of distribution transformer real-time monitoring and power consumption information concentrator are integrated on one device. The concentrator can collect the distribution transformer’s current, voltage, and phase, and calculate the corresponding real-time values such as power factor and harmonics, which reduces the equipment’s installation and maintenance costs;

2) The communication mode of the concentrator supports carrier and wireless communication channels at the same time. The carrier can be one of broadband carrier or high-speed narrowband carrier, and the wireless can be one of 2.4G or 470M. It can be configured with a designated carrier or one of wireless One is the main channel, and the other is the backup channel; use two channels of completely different nature for data transmission, give full play to the respective advantages of the two channels, and greatly improve the robustness, reliability and real-time performance of meter reading data transmission ;

3) The concentrator has the function of automatic data retransmission. The concentrator automatically discovers the corresponding relationship between the meter and the collector, which improves the efficiency and reliability of on-site installation and provides a technical basis for large-scale on-site implementation.

Description of drawings

Below in conjunction with accompanying drawing, technical solution of the present invention will be further described:

Fig. 1: the structural block diagram of multifunctional concentrator of the present invention;

Figure 2a: Circuit block diagram of the data processing module;

Figure 2b: Circuit schematic diagram of the communication MCU module;

Figure 2c: Circuit schematic diagram of the broadband carrier module;

Figure 2d: Circuit schematic diagram of the high-speed narrowband carrier module;

Figure 2e: Circuit schematic diagram of 2.4G wireless module;

Figure 2f: Circuit schematic diagram of 470M wireless module;

Figure 3: Flowchart of the dual-channel data transmission process;

Figure 4: The flowchart corresponding to the automatic electric meter.

See the table below for the meanings of the symbols in the figure:

Reference signs meaning Reference signs meaning Reference signs meaning 1 Data processing module 2 Communication MCU module 3 Wideband Carrier Module 4 High-speed narrowband carrier module 5 2.4G wireless module 6 470M wireless module

Detailed ways

Design a power consumption information concentrator that can use dual channels at the same time, use a high-performance embedded MCU to collect and calculate the power information of three-phase low-voltage power in real time, and can monitor the data packets from the Ethernet port at the same time. Respond to the electric energy collection command, and use the dual-channel communication module configured in the downlink to collect the data of the electric meter under the table.

As shown in Figure 1, the multifunctional concentrator conforming to the DLT 698 standard includes data processing module 1, communication MCU module 2, broadband carrier module 3, high-speed narrowband carrier module 4, 2.4G wireless module 5 and 470M wireless module 6, communication The MCU module 2 and the data processing module 1 are connected by the data bus stipulated in the national network type specification, and the broadband carrier module 3 used for the broadband carrier communication channel is connected with the communication MCU module 2, and the high-speed narrowband carrier used for the high-speed narrowband carrier communication channel Module 4 is connected with communication MCU module 2, 2.4G wireless module 5 for 2.4G wireless communication channel is connected with communication MCU module 2, and 470M wireless module 6 for 470M wireless communication channel is connected with communication MCU module 2.

Among them, the communication MCU module 2 is connected to the data processing module 1 through the TTL level RS232 and SPI interface, and the standard DL/T 645 and 698.42 protocols are adopted between the communication MCU module 2 and the data processing module 1;

The broadband carrier module 3 is connected to the communication MCU module 2 through the SPI or Ethernet port, and the data transmission adopts the full-duplex mode;

The high-speed narrowband carrier module 4 is connected to the communication MCU module 2 through SPI or TTL level 232 port, and the data transmission adopts full-duplex mode;

2. The 4G wireless module 5 is connected to the communication MCU module 2 through the SPI port, and the data transmission adopts the full-duplex mode;

The 470M wireless module 6 is connected to the communication MCU module 2 through the SPI port, and the data transmission adopts the full-duplex mode.

Figure 2a shows the circuit block diagram of the data processing module of the concentrator, and the hardware part is divided into 6 parts according to the function: 1) main control unit; 2) power supply board; 3) GPRS/CDMA remote communication board; 4) metering unit; 5) Downlink communication; 6) Man-machine interface. Data processing module 1 adopts the chip of model ARM 7;

Figure 2b shows the circuit principle of the communication MCU module. The communication MCU module 2 uses a chip of the type ARM Cortex M3.

Figure 2c shows the circuit principle of the broadband carrier module. The broadband carrier module 3 uses a chip of the type INTELLON 5500x.

Figure 2d illustrates the circuit principle of the high-speed narrowband carrier module, the high-speed narrowband carrier module 4 adopts a chip of model MAX 2990.

Fig. 2e illustrates the circuit principle of the 2.4G wireless module, and the 2.4G wireless module 5 adopts a chip of model MC13192.

Fig. 2f illustrates the circuit principle of the 470M wireless module, and the 470M wireless module 6 adopts a chip of the model CC1100E.

The concentrator has the function of distribution transformer monitoring, which can collect the current, voltage and phase of the distribution transformer, and calculate the corresponding power factor, harmonic and other real-time values. Its specific functions conform to DL/T 698.41; The processing and communication modules are connected by RS232 and SPI standard interfaces at TTL level; the communication module of the concentrator has an independent MCU to realize communication management; the data transmission between the concentrator and the collector adopts a dual-channel method; the concentrator has data Automatic retransmission function; the concentrator has an automatic meter discovery function, which can automatically discover the connection relationship between the specified meter and the collector.

The communication mode of the concentrator supports both carrier and wireless communication channels; the carrier can be one of broadband carrier or high-speed narrowband carrier; the wireless can be one of 2.4G, 470M or 433; the specified carrier or wireless can be configured One is the main channel and the other is the backup channel.

During the specific application of the above-mentioned multifunctional electric energy information concentrator, the data collected is processed by the data processing module 1, and the signals output by several electric energy meters or several power consumption data signals are respectively processed and stored; the data processed by the data processing module 1 Information exchange with communication MCU module 2; communication MCU module 2 and broadband carrier module 3 form a broadband carrier communication channel, communication MCU module 2 and high-speed narrowband carrier module 4 form a high-speed narrowband carrier communication channel, communication MCU module 2 and 2.4G wireless module 5 Constitute a 2.4G wireless communication channel, the communication MCU module 2 and the 470M wireless module 6 form a 470M wireless communication channel; one of the broadband carrier communication channel and the high-speed narrowband carrier communication channel is connected with the 2.4G wireless communication channel and the 470M wireless communication channel One of the channel combinations constitutes a dual channel, any one of the dual channels is set as the main channel, and the other is set as the backup channel; the communication MCU module first communicates with the collector through the main channel, and cannot succeed in the main channel. When communicating, switch to the backup channel; when the main channel recovers, switch back to the backup channel.

Satisfactory realization: (1) use two channels of carrier channel and wireless channel for data transmission; (2) automatic meter correspondence, concentrator automatic discovery and meter;

Wherein, (1) use carrier channel and wireless channel to carry out data transmission, as shown in Figure 3:

(S101) The concentrator uses one of the broadband carrier communication channel and the high-speed narrowband carrier communication channel and one of the 2.4G wireless communication channel and the 470M wireless communication channel to work, and any communication channel is configured as the main channel and backup channel;

(S102) The concentrator sends a frame of data through the main channel, waiting for confirmation;

(S103) If the concentrator receives the confirmation, then the transmission is successful, and the transmission ends, otherwise go to (S104);

(S104) If the concentrator does not receive confirmation within the specified time, the concentrator resends the data through the backup channel and waits for confirmation;

(S105) If the concentrator receives the confirmation, the transmission is successful and the transmission ends;

(S106) If the concentrator does not receive an acknowledgment within the specified time, the transmission fails.

(2) Automatic meter correspondence, concentrator automatic discovery and meter, as shown in Figure 4:

(S201) When the concentrator needs to copy a certain ammeter, first check the corresponding table of the collector and the ammeter;

(S202) If there is a corresponding entry in the corresponding table, then take out the corresponding electric meter and receiver information, and the corresponding process ends, otherwise go to step (S203);

(S203) The concentrator sends the whole network broadcast command to all collectors, requiring all collectors to attempt meter reading;

(S204) All collectors in the network carry out a test copy to the ammeter through port 485. If the ammeter is under the corresponding collector, the meter generates response data, and the collector returns corresponding data to the concentrator after receiving the response data;

(S205) After the concentrator receives the electric meter data returned by the collector, it records the corresponding relationship between the corresponding electric meter and the collector in the table item.

The concentrator of the present invention adopts two technologies of broadband power line carrier, narrowband power line carrier, 470M wireless, and 2.4G wireless technology to form dual channels. When sending data, if one channel fails to send, it will automatically switch to another channel for transmission. Automatic meter correspondence, the master station system does not need to send the corresponding information of the collector and the meter to the concentrator, the master station system only needs to send the communication address of the meter belonging to the concentrator to the concentrator, and the concentrator can automatically find the corresponding meter Collector, and communicate directly with the collector in the subsequent data transmission process.

In summary, the present invention achieves satisfactorily: 1) use two channels of completely different properties to carry out data transmission, give play to the respective advantages of the two channels, and greatly improve the robustness, reliability and real-time performance of meter reading data transmission; 2) The concentrator automatically discovers the corresponding relationship between the meter and the collector, which improves the efficiency and reliability of on-site installation, and provides a technical basis for large-scale on-site implementation.

It should be understood that: the above description is not intended to limit the present invention, and additions, transformations, replacements, etc. within the scope of the concept of the present invention should also belong to the protection scope of the present invention.

Claims (6)

1. A multifunctional power information concentrator, comprising a data processing module and a communication MCU module, the communication MCU module communicates with the data processing module, and is characterized in that: it also includes a broadband carrier module, a high-speed narrowband carrier module, and a 2.4G wireless module and a 470M wireless module, the broadband carrier module, the high-speed narrowband carrier module, the 2.4G wireless module and the 470M wireless module are all communicated with the communication MCU module. 2. The multifunctional electric energy information concentrator according to claim 1, characterized in that: the communication MCU module is connected to the data processing module through the RS232 and SPI interface of TTL level, and the communication MCU module and the data processing module are connected simultaneously. Support standard DL/T645 and 698.42 protocols; The broadband carrier module is connected to the communication MCU module through an SPI interface or an Ethernet port, and the data transmission adopts a full-duplex mode; The high-speed narrowband carrier module is connected to the communication MCU module through the TTL level RS232 port or SPI port, and the data transmission adopts full-duplex mode; The 2.4G wireless module is connected to the communication MCU module through the SPI port, and the data transmission adopts full-duplex mode; The 470M wireless module is connected with the communication MCU module through the SPI port, and the data transmission adopts the full-duplex mode. 3. The multifunctional electric energy information concentrator according to claim 1 or 2, characterized in that: the data processing module adopts a chip of ARM 7 model, and the communication MCU module adopts a chip of ARM Cortex M3, so The broadband carrier module adopts a chip model of INTELLON 5500x, the high-speed narrowband carrier module adopts a chip model of MAX 2990, the 2.4G wireless module adopts a chip model of MC13192, and the 470M wireless module adopts a chip model of CC1100E . 4. The communication method of the multifunctional electric energy information concentrator according to claim 1, characterized in that: the data collected is processed by the data processing module, and the signals output by several electric energy meters or several power consumption data signals are respectively processed, Storage; the data information processed by the data processing module is exchanged with the communication MCU module; the communication MCU module and the broadband carrier module form a broadband carrier communication channel, and the communication MCU module and the high-speed narrowband carrier module form a high-speed narrowband carrier communication channel. The communication MCU module and the 2.4G wireless module form a 2.4G wireless communication channel, and the communication MCU module and the 470M wireless module form a 470M wireless communication channel; one of the broadband carrier communication channel and the high-speed narrowband carrier communication channel is connected to the 2. One of the 4G wireless communication channels and the 470M wireless communication channel is combined to form a dual channel, any one of the dual channels is set as the main channel, and the other is set as the backup channel; the communication MCU module first passes the main The channel communicates with the collector. When the main channel fails to communicate successfully, it switches to the backup channel; when the main channel recovers, it switches back to the backup channel. 5. The communication method of the multifunctional electric energy information concentrator according to claim 4, characterized in that: use the main channel and the backup channel to carry out dual-channel communication according to the following steps: (S101) The concentrator uses one of the broadband carrier communication channel and the high-speed narrowband carrier communication channel and one of the 2.4G wireless communication channel and the 470M wireless communication channel to work, and any communication channel is configured as the main channel and backup channel; (S102) The concentrator sends a frame of data through the main channel, waiting for confirmation; (S103) If the concentrator receives the confirmation, then the transmission is successful, and the transmission ends, otherwise go to (S104); (S104) If the concentrator does not receive confirmation within the specified time, the concentrator resends the data through the backup channel and waits for confirmation; (S105) If the concentrator receives the confirmation, the transmission is successful and the transmission ends; (S106) If the concentrator does not receive an acknowledgment within the specified time, the transmission fails. 6. The communication method of the multifunctional electric energy information concentrator according to claim 4, characterized in that: the automatic electric meter correspondence, the automatic discovery of the concentrator and the electric meter are carried out according to the following steps: (S201) When the concentrator needs to copy a certain ammeter, first check the corresponding table of the collector and the ammeter; (S202) If there is a corresponding entry in the corresponding table, then take out the corresponding electric meter and receiver information, and the corresponding process ends, otherwise go to step (S203); (S203) The concentrator sends the whole network broadcast command to all collectors, requiring all collectors to attempt meter reading; (S204) All collectors in the network carry out a test copy to the ammeter through port 485. If the ammeter is under the corresponding collector, the meter generates response data, and the collector returns corresponding data to the concentrator after receiving the response data; (S205) After the concentrator receives the electric meter data returned by the collector, it records the corresponding relationship between the corresponding electric meter and the collector in the table item.

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