Control system development of street light
Urban road lighting is an important public facility in people’s daily life. The existing street light in China is 100 million , accounting for 30% of the lighting power consumption, reaching 10% of the total electricity consumption in the country, which is equivalent to the annual power generation capacity of a Three Gorges hydropower station. The Daya Bay nuclear power plant generates 7 times the annual power, and about 35% of the power is wasted. Energy conservation and emission reduction have become an important goal in economic construction. With the advancement of science and technology, energy-saving street lights and control methods are constantly evolving. Since the “Ten Cities, Ten Thousand Cities” and 193 “Smart Cities” pilots have been promoted, the integration solar street light control system with wireless technology as its core has enormous potential for development.
The street light control system is mainly composed of two parts, the luminaire and the control system. In addition to the use of energy-saving lamps, a unified and efficient control system plays a crucial role in the energy saving and management of street lamps. The control methods of street lamps are constantly evolving and evolving. There are mainly the following stages of development:(solar street light )
The first stage: manual control
That is, the most primitive way to achieve the switching operation is by manually closing/disconnecting the power supply.
The Second stage: clock control
Through the clock module to achieve the timing switch lights, sub-period lighting. However, the lighting strategy is inconvenient to modify and has poor flexibility.
The third stage: photosensitive control
The light is switched on and off by sensing the light changes by the photosensor. This method can be operated automatically, but the stability is not sufficient due to the influence of objective conditions.
The fourth stage: Regional Control
The system uses GPRS communication technology and can remotely control each transformer area and single line. The combination of clock control and latitude and longitude control enables manual or automatic regional control based on environmental changes and lighting requirements for special events.
Phase 5: Single Light Control
On the basis of regional control, using wireless IoT technologies such as ZigBee, GPRS and WSN, to sense the electrical parameters of any street light, switch, dim, and query any street light.