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一、Project background and requirements
Project location: Xiyu Nonferrous Metals 110KV Substation, Golmud City, Haixi Prefecture, Qinghai Province
Project background: Recently, a Beijing technology company approached us to collect data from the substation's VIA Information Technology's electric energy collection terminal (WFET-3000). The internal protocol of the collection terminal is the IEC102 protocol, and data collection of the IEC102 protocol needs to be implemented .
Project purpose and difficulty: To realize data collection of Wasion electric energy collection terminal, convert IEC102 protocol into MODBUS TCP protocol, and connect to the host computer. Low-cost implementation, IEC102 protocol is different from other conventional protocols, and the protocol structure is complex: IEC102 protocol is a standard protocol for the transmission of electric energy accumulation in power systems. It adopts a layered structure design, including application layer, link layer and other multi-layer protocol stacks. Each layer of protocol has strict format and interaction process requirements, which is difficult to understand and implement. Diverse data types: Supports the transmission of multiple data types, such as electric energy data, status data, parameter data, etc. There are differences in the encoding methods and transmission rules of different types of data, which increases the complexity of collection. The protocol details are cumbersome: including many details such as frame format definition, error control mechanism, link establishment and release process, etc., and any deviation in understanding of any link may lead to collection failure.
VIA Energy Harvesting Terminal
VIA 102 Protocol Message Example
In view of the difficulties in IEC102 protocol acquisition, we develop and customize corresponding IEC102 protocol acquisition software and drivers at the technical level to realize customer software and hardware acquisition.
二、Project implementation technical plan
The customer cooperated on site, matched with our company's DAQ host computer data acquisition software, connected the on-site serial port to the local server (host computer), installed the host computer software on the local server (host computer), connected the serial port to the host computer, matched the test acquisition successfully, solved the difficulty of protocol reading and parsing, and finally implemented it in the landing environment with hardware products.
R&D and testing process
According to the corresponding protocol instructions and point table information provided, the host computer configures the relevant points, and after docking and debugging, the collection is implemented .
Data Collection Example
The protocol acquisition is successful, and the modbus TCP function is converted to the corresponding hardware. Our company's product communication management machine (DAQ-GP-DPU102) is used. The networking method is as follows
Collection plan topology diagram
3. On-site installation and data connection
On-site installation and implementation, the electric energy collection terminal is connected to the communication management machine through the serial port , the communication management machine is powered and wired, and the upper network port modbus TCP output is wired.
Product and on-site installation implementation
三、Implement data collection and final presentation
For the collected data fields, the customer mainly reflects the power consumption, and other power consumption information is not pushed. The docking data example (see the figure below) shows that the data is successfully docked.
