summary:
　　The FKGB42-0095 power load management terminal adopts a high-performance 32-bit embedded RISC CPU hardware platform, an embedded real-time operating system, and can communicate with the power load management master station using mobile public network GPRS/CDMA or other communication methods. The terminal implements local power and electricity control according to the planned electricity consumption indicators sent by the main station, and can also directly receive remote control commands from the main station to control the user's load. The terminal can actively report or respond to call reports on the user's electricity parameters, the results of load control, as well as important information and alarm messages during terminal operation. The terminal supports data acquisition for multiple protocols of electric energy meters. The terminal adopts a dot matrix LCD display, menu driven, and simple and intuitive operation. As an intelligent collection and execution terminal in load control and management systems, it is widely used in large users, substations, and distribution substations, providing reliable technical means for orderly electricity use, safe electricity use, and electricity inspection.
Main functions:
1. Measurement function:
1) Measure the positive and negative active power of the total and various rates.
2) Measure the total and each rate of reactive power in four quadrants, and the sum of reactive power values in any two quadrants.
3) Measure the positive active and reactive power demand and their occurrence time for the total and various rates.
4) Effective value of three-phase voltage.
5) Effective value of three-phase current.
6) Three phase power factor and total power factor.
7) Three phase instantaneous active power and instantaneous reactive power.
2. Measurement function
The main sources of data collection for the terminal include measurement data from the terminal itself, pulse outputs from other energy meters, RS485 outputs (from meters, AC sampling devices, or other intelligent devices), as well as switch auxiliary contacts, door contacts, etc. It can measure AC current such as voltage, current, power, electricity quantity, power factor, and high demand.
2.1 Collection volume:
1) Local measurement data
2) 4-channel pulse input
3) 4-channel switch input (switch auxiliary contact, door contact)
4) Intelligent device input with RS485 interface.
2.2 Collection cycle
The pulse acquisition calculation cycle is 1 minute. The sampling period for the auxiliary contacts of the trip switch is 1 second, and the default sampling period for terminal meter data is 15 minutes, which can be set within the range of 1 minute to 60 minutes. The pulse power and calculation method adopt an approximate 1-minute calculation of average power, while refreshing the display.
2.3 Collecting and generating data
The data collected and calculated by the load management terminal can be divided into the following categories.
(1) Real time and current data
(2) Historical daily data
(3) Historical monthly data
3. Parameter tuning and querying:
The terminal receives and saves the parameters set by the main station
4. Remote control tripping and closing function:
The terminal controls the terminal according to the control commands issued by the main control station. The remote control commands issued by the main console include control rounds, alarm time, and control (power restriction) time.
5. Local closed-loop control
5.1 Power Control
The internal switch of the customer terminal is divided into several rounds according to the load category. When the power control is activated, the current load value is automatically recorded. When the load exceeds the set value, the terminal automatically trips in the order of the activated rounds and delay time, causing the load to drop below the set value and recording the current load value. When the power is below the set value, the remaining switches will no longer trip.
Power control includes time period power control, factory shutdown control, business shutdown control, and current power reduction control. In the case of effective time period control, factory rest control, and current power reduction control, the current power reduction control takes priority, followed by business shutdown control, factory rest control, and time period control has a lower priority. When implementing the above power control, various power settings should be compared with the security settings first. If they are greater than the security settings, they should be executed according to their respective settings. If they are less than the security settings, they should be executed according to the security settings. If the main station does not issue the security settings, the terminal defaults to the large values supported by the communication protocol.
May 2nd Electricity Control
In the case of monthly electronic control input, when the actual monthly electricity consumption of the user reaches 80% of the monthly electricity consumption set value, the terminal will automatically sound and light an alarm twice a day (10 o'clock, 15 o'clock). When the actual monthly electricity consumption exceeds the monthly electricity consumption set value, the terminal will automatically trip in the order of the input rounds and delay time (1 minute), restricting the user from using electricity again. The terminal simultaneously records the monthly electricity alarm time, actual electricity consumption, and the time and amount of electricity at the end of the trip; At midnight on the first day of the following month or when the current month's electricity control is lifted, automatic closing is allowed.
6. Electricity purchase control
1) Basic parameters for purchasing electronic controls
The terminal stores the following parameters issued by the main station: purchase order number, current purchase quantity, purchase method (add or refresh), alarm quantity threshold, and trip quantity threshold.
2) Process description for purchasing electronic control
(1) The main station sends the purchase order number, purchase amount, alarm amount, trip amount, and sets the purchase control input and control cycle.
(2) When the terminal is in a non power protection state, initiate control.
(3) The conditions for restoring the closing of the purchased electronic control.
7. Power protection function
When the terminal is in power on mode, no trip signal is output, but the terminal control logic still executes.
When the terminal does not receive a call test command from the main station within a certain period of time, the terminal will automatically enter the power protection state. This time is the automatic power protection time when the terminal has no communication, which can be set by the main station.
If the terminal loses power for more than two minutes, it is considered a power outage. At this time, when the terminal is powered on, it will automatically enter a power on state for 10 minutes.
The above power protection states can be exited by issuing a power protection release command from the main station.
8. Remove function
When the terminal receives the discard input command, it does not respond to any broadcast command or terminal group address command (except for timing commands).
9. Call function
1) Broadcast call: The main station can broadcast calls to various terminals by setting commands.
2) Site selection call: The main station can communicate with a certain terminal through setting commands as needed, and other terminals should not hear it.
3) Prohibit calls: The main station can lock the call function of the terminal through commands.
10. Meter reading function
The remote meter reading system is an automated system that collects, calls for, stores, and shares electricity meter data to serve data application departments such as electricity, metering, and biotechnology.
1. Terminal data collection method for electricity meters: scheduled meter reading, daily meter reading; As needed; The terminal can store data for 31 meter reading days; Provide transparent transmission function for meter data according to the special needs of raw information for meter reading.
2. Meter data storage: The terminal will store the meter data collected at regular intervals in a standardized format for unified storage.
11. Terminal communication sampling data
The terminal uses an AC sampling device to achieve functions such as anti electricity theft monitoring and voltage monitoring.
12. Data forwarding
The terminal has the function of forwarding commands from the main station to subordinate intelligent devices (such as electricity meters and AC collection devices) and transmitting the return data information of the intelligent devices to the main station.
13. Local maintenance
The terminal has a local maintenance interface, and the communication protocol of the local maintenance interface is the same as that of the remote communication interface. The local maintenance function is mainly provided to users to meet the requirements of demand side management. Installation and maintenance personnel can also achieve communication between the terminal and on-site testing equipment through the local maintenance interface, and perform on-site queries on terminal parameters and operating data, including terminal or measurement point parameters, real-time data, historical daily data, and historical monthly data.
14. Initialization
The terminal receives initialization commands issued by the main station, which are divided into the following three types:
1) Hardware initialization: Reset the terminal hardware once;
2) Data area initialization: The terminal initializes the data storage area;
3) Parameter area initialization: The terminal initializes both the parameter area and the data area.
15. Terminal relay forwarding function
Using ordinary terminals as communication relays to cover terminals around them that receive weak signals from the main station or cannot be covered by the main station, improving communication conditions. A relay terminal can relay no more than 16 terminals. The terminal being relayed cannot communicate with the main station. The relay terminal stores the address of the relay terminal. When the terminal receives the issued command, it determines whether it is the local address. If it is, it responds to the main station command. If it is one of the relayed terminals of the terminal, the main station command will be forwarded. The uploaded information from the relay terminal is also transmitted to the main station through a similar method.
16. Remote upgrade
The terminal supports the main station to use communication channels to remotely upgrade the software and communication protocols of the terminal, which ensures the security of data within the terminal.
Main technical parameters: