Ginsei Corporation

What are HEMS, BEMS, FEMS, and CEMS?

An energy management system (EMS) is a system to visualize electricity quantity used, control the devices for energy saving (CO2 reduction), and control renewable energy such as solar generators and capacitors. Depending on what to be managed, it is called HEMS, BEMS, FEMS, or CEMS.

HEMS (Home Energy Management System)

HEMS stands for Home Energy Management System and read "hemz".

HEMS is a system for managing energy to be used at home in conjunction with HAN (Home Area Network). HEMS helps make the use of electricity more efficient, contributing to energy saving and CO2 reduction. When generating electricity through solar power generation using solar panels and storing the electricity in a storage battery such as lithium ion battery to establish HEMS, you need to grasp how much power is generated and stored in real time. It is also necessary to know how much electricity home electrical appliances are consuming. Knowing and controlling the power quantity consumed for each home electrical appliance allows for more detailed power management. It is also required to keep track of the remaining amount of electric vehicle batteries and control when to charge them.

Application Examples of HEMS

Smart power supply tap: Monitoring of electricity consumed per outlet and on-off control of power supply.
Smart lighting: Monitoring of electricity consumed by lighting and on-off / dimming control of power supply.
Solar power generation: Monitoring of electricity generated by solar power generators and control for making power generation more efficient.
Fuel power generation: Monitoring of electricity generated by fuel power generators and control for making power generation more efficient.
Smart storage: Monitoring of electricity stored by home-use capacitors (distributed storage) and control of discharging and charging.
EV charging: Charging control of an electric vehicle.
Smart meter "B route": Monitoring electricity use.

BEMS (Building Energy Management System)

BEMS stands for Building Energy Management System and reads "bemz".

BEMS is a system for monitoring and controlling electricity usage by power distribution facilities, air conditioning facilities, lighting facilities, and OA devices in a building.

Application Examples of BEMS

Smart distribution board: Monitoring of electricity consumed per distribution board.
Adjustment of power usage at the peak.
Measurement of power used per tenant.
Monitoring of power supply for emergency.
Smart air conditioning: Monitoring of temperature and humidity and control of boilers, refrigerators, and air conditioning machines.
Smart lighting: Monitoring of illuminance and on-off / dimming control of lighting.

FEMS (Factory Energy Management System)

FEMS stands for Factory Energy Management System and read "fems".

FEMS is a system for monitoring and controlling electricity usage by power distribution facilities, air conditioning facilities, lighting facilities, and manufacturing line facilities in a factory.

Application Examples of FEMS

Smart distribution board: Monitoring of electricity consumed per distribution board.
Adjustment of power usage at the peak.
Smart air conditioning: Monitoring of temperature and humidity and control of boilers, refrigerators, and air conditioning machines.
Smart lighting: Monitoring of illuminance and on-off / dimming control of lighting.

CEMS (Cluster/Community Energy Management System)

CEMS stands for Cluster / Community Energy Management System and read "sems".

CEMS is a system for managing the power supply by power generation stations including photovoltaic power plants and wind power plants and the power demand in the community. CEMS is a key component of smart grid. CEMS is a system that manages all the energy in the community including HEMS, BEMS, and FEMS. Here are application examples:

Application Examples of CEMS

Smart meter "A route": Automated meter reading of power usage amount and remote control of breakers.

Communication method HEMS, BEMS, FEMS, the CEMS

In establishing a system for HEMS, BEMS, FEMS, and CEMS, many sensors are needed to monitor various conditions needed for energy management. Since it is not practical to hard-wire all the devices under management in HEMS, BEMS, FEMS, and CEMS for monitoring and control, it will be necessary to combine wired and wireless connection. As a communications method to collect the information from a number of sensors, wireless communications are very effective. In addition, it will also be necessary to implement various controls based on the collected information. To do such controls, wireless connection is very useful.

As one of the best methods to conduct wireless communications with sensors and actuators in HEMS, BEMS, FEMS, and CEMS, we have the IEEE802.15.4 standard. The standard is an international standard developed with the aim of establishing a wireless sensor network, and the specifications allow many devices to be connected at low power consumption. By adopting the IEEE802.15.4, the devices optimized for communications with sensors and actuators can be configured.

We are offering IEEE802.15.4 Wireless Module best suited to construct a wireless sensor network, and help you simplify the process to develop communications functions for your HEMS, BEMS, FEMS, and CEMS related devices and expedite the time to market.

For more details on our products, please see Wireless Products.

Related Information

- What is IEEE802.15.4?
- What is Wireless Sensor Network?
- What is Internet of Things?
- Communications between Devices: What is Wireless M2M Communications?