METERING COMPREHENSIVE INFORMATION COLLECTION SUBSYSTEM
Metering comprehensive information collection generally consists of an electronic multi-functional meter, public transformer collection terminals, Data Collection Units, and a computer network. The metering collection center automatically (or as per settings) transfers metering information collected by public transformer collection terminals and the customers’ special transformer GPRS meters to the system through GPRS. The substation’s main meter transfers the information back to this subsystem through wired communication. The system analyzes collected data, generates daily and monthly line loss reports, reactive energy, load and voltage analysis, and sets alarms on abnormalities in analysis results.
Data from metering collection are not the final data needed by the executives of electricity supply enterprises. After statistical analysis, it is turned into the data which can be used by the executives to make decisions. This subsystem makes more effective use of metering data by further analyzing the metering data, so it gives significant and useful information support for the executives in electricity supply enterprises.
- a) Line Loss Analysis
The line loss analysis includes on-line loss, power factors, current and voltage of the main-line, the low-voltage transformer area, the 10KV line, the 35KV line, and others.
- b) Voltage Analysis
The value is set by this system and determines normal and abnormal parameters.
- c) Abnormalities Analysis
The system will automatically gather statistics and display all information that is abnormal and exceeds the standard. These include transformer area line loss abnormalities, transformer area three-phase imbalance abnormalities,transformer area abnormal voltage, and transformer area users’ abnormalities.
- d) Reactive Analysis
According to the active energy and reactive energy of the substation main meter, the system analyzes active power, reactivepower, and power factors of the line where the substation main meter is on. This offers information and data, which can then be followed during maintaining transformer maintenance and proper line operation.
- e) Load Analysis
Load analysis obtains statistics of the line transformer loads and calculates the transformer load rate. This ensures normaloperation of the transformer and lines.