News - power load management system

What is  power load management system?

Power load management system is a way of monitoring and controlling power energy by the communications of wireless, cable and power line etc. Power supply companies timely monitor and control the electricity consumption of each region and client with the load management terminal installed at the client’s house and analyze the collected data and the application of the integrated system. It includes terminals, transceiver equipment and channels, hardware and software equipment of the master station and the database and documents formed by them.

What are the functions of the load management system?

The application functions of power load management system include data acquisition, load control, demand side and service support, power marketing management support, marketing analysis and decision analysis support, etc. Among them:

(1) Data acquisition function: by the ways of rough regular, random, incident response and other ways  to collect data of (power, maximum demand and time, etc.), the electric energy data ( cumulative values of active and reactive, watt-hour meter measurement data, etc.), power quality data (voltage, power factor, harmonic, frequency, power outage time, etc.), working condition of data (working condition of electric energy metering device, the switch state, etc.), the event log data (the exceeded time,  the abnormal events, etc.) and other relevant equipment provided by the client data acquisition.

Note: “out of limit” means that when the power supply company restricts the power consumption of the customer, control terminal will automatically record the event for future inquiry after the client exceeds the power consumption parameters set by the power supply company. For example, the power blackout time is from 9:00 to 10:00 with the capacity limit is 1000kW. If the customer exceeds the above limit, the event will be automatically recorded by the negative control terminal for future inquiries.

(2) Load control function: under the centralized management of the system master station, the terminal will automatically judge the customers’ energy consumption based on the instruction of the master station. If the value exceeds the fixed one, then it will control the side switch according to the scheduled tip order to achieve the goal of adjustment and limit load.

The control function can be defined as remote control and local closed-loop control depending on whether the control signal comes directly from the master station or terminal.

Remote control: The load management terminal operates the control relay directly according to the control command issued by the main control station. The above control can be done by real – time human intervention.

Local closed – loop control: local closed – loop control includes three ways: time – period control, plant – off control and current power – down floating control.  It is to automatically operate the relay after calculating at the local terminal according to various control parameters issued by the main control station.  The above control is pre-set on the terminal. If the customer exceeds the control parameters in actual use, the system will operate automatically.

(3) Demand side and service support functions:

A. The system collects and analyzes the power data of the client, timely and accurately reflects the power market demand, and provides basic data for forecasting the load demand and adjusting the power supply and demand balance.

B. Provide customers with the electricity load curve, help customers with the optimization analysis of the electricity load curve and the cost analysis of the enterprise’s production electricity, provide customers with the rational use of electricity, improve the electricity efficiency, carry out data analysis and technical guidance of energy efficiency management, etc.

C. Implement demand-side management measures and schemes approved by the government, such as avoiding peak time.

D. Monitor the power quality of the client, and provide basic data for the corresponding technical and management work.

E. Provide data basis for power supply fault judgment and improve fault repair response ability.

(4) Power marketing management support functions:

A. Remote meter reading: realize daily timing remote meter reading. Ensure the timeliness of meter reading and the consistency with the data of electricity meters used in trade settlement; Complete collection of customer electricity consumption data, to meet the meter reading, electricity and electricity billing management needs.

B. Electric bill collection: send corresponding demand information to the customer; Use the load control function, implement the charge and power limit; Electricity sales control.

C. Electric energy metering and power order management: realize online monitoring of the running status of the metering device on the client side, send alarm for abnormal situation in time, and provide basis for the technical management of the electric energy metering device.

D. Overcapacity control: Use load control function to implement power control for overcapacity operation customers.

(5) Support function of marketing analysis and decision analysis: provide technical support for electric power marketing management and analysis and decision with the simultaneity, extensiveness, real-time and diversity of data collection.

A.  analysis and forecast of Power sales market

B. Statistical analysis and forecast of industrial electricity consumption.

C. Dynamic evaluation function of electricity price adjustment.

D. Dynamic statistical analysis of TOU electricity price and economic evaluation analysis of TOU electricity price.

E. Curve analysis and trend analysis of customer and industry electricity consumption (load, power).

F. Provide data for line loss analysis and assessment management.

G. Provide necessary line load and power quantity data and analysis results for business expansion and load balancing.

H. Publish electricity supply information for customers.

What is the function of the power load management system?

During load balancing, with ” the data acquisition and analysis of electric energy ” as the key function, the system is to realize the electricity information remote acquisition, implement power demand side management, help and guide the customer save energy and reduce consumption. During the power supply shortage, with “orderly power utilization management” as the key functions, the system implements “peak electricity”, “no cut off with limitation”, which is an important measurement to ensure grid security and maintain the order of grid electricity and to build a harmonious environment.

(1) Give full play to the role of the system in power load balancing and dispatching. In the area where the power load management system is built, the line will not generally be cut off due to load restriction, which ensures the normal use of electricity by residents and thus ensures the safe and economic operation of the power grid.

(2) Conduct the classified load survey of the city. It provides the decision basis for transferring peak load, making TOU price and dividing time of electricity consumption.

(3) Real-time monitoring of classified loads, classification and summary of user data, and active development of medium – and short-term load forecasting.

(4) Support electricity billing collection, support users to purchase electricity in advance with significant direct economic benefits

(5) Carry out remote meter reading for electricity bill settlement, so as to improve the fluctuation of line loss caused by manual meter reading.

(6) Monitor the measurement and master the load characteristics of each region timely. It can also realize monitoring the anti-tampering and reduce power loss. The comprehensive economic benefits of the load management system are fully played.

What is a power load management terminal?

Power load management terminal (terminal for short) is a kind of equipment which can collect, store, transmit and execute control commands of customers’ electricity information. Commonly known as negative control terminal or negative control device. The terminals are divided into Type I (installed by customers with 100kVA and above), Type II (installed by customers with 50kVA≤ customer capacity < 100kVA), and type III (resident and other low-voltage collection devices) power load management terminals. The type I terminal USES 230MHz wireless private network and GPRS dual-channel communication, while the type II and III terminals use GPRS/CDMA and other public network channels as communication modes.

 Why do we need to install negative control?

Power load management system is an effective technical means to implement power demand side management, realize power load control to the household, reduce the impact of power shortage to the minimum, and make the limited power resources produce the maximum economic and social benefits.

What are the customer benefits of installing an electrical load management device?

(1) When, for some reason, the power grid is overloaded in a certain region or at a certain period of time, through the load management system, the users concerned cooperate with each other to quickly reduce the load that can be reduced, and the power grid overload will be eliminated. As a result of avoiding the loss of power failure caused by power restriction, we have saved all the needed power protection, reduced the economic loss to the minimum, and the society and daily life electricity consumption will not be affected, “beneficial to the society, benefit enterprises”.

(2) It can provide customers with services such as optimization analysis of power load curve, improvement of power consumption efficiency, energy efficiency management and power supply information release.