01Capacitance compensation energy saving scheme
At present, the most widely used solution is capacitance compensation, adding an inductive ballast to the bulb, and reacting with other substances to produce a gas that can emit light, which plays a role in energy saving. The characteristics of electronic ballasts are that they have excellent performance in power saving, and their own energy consumption is very low, only 5% of the power of ordinary lamps. At the same time, they have a high power factor, which can greatly improve the efficiency of the power grid.
02Pressure-regulated energy-saving solution
The traditional voltage regulation energy-saving scheme is mainly composed of two modes—transformer voltage regulation and thyristor voltage regulation, but these two voltage regulation modes have more or less different shortcomings. Therefore, a new voltage regulation method came into being. The modulation principle is as follows: the environmental data information of the system operation can be collected, the actual output power of the circuit can be calculated, and the luminous brightness of the street lamp can be controlled by adjusting the voltage. dimming task. The scheme utilizes less electric energy to meet the lighting requirements and maintains the stability of the voltage of urban street lamps.
03LED street light solution
Compared with traditional light sources, LED light sources have many advantages, such as higher luminous efficiency, adjustable color temperature, higher color rendering index, smaller size, and less heat generation. Currently, as the fourth-generation light source, it has become the mainstream product of future lighting. In the arrangement of LED street lamps, the form of series LED lamps is simple, the circuit is easy to connect, and the current and brightness are consistent. However, this connection method also has some shortcomings, such as low reliability performance, high driver output voltage, and high requirements for bypass series connection. Hybrid LED lamps are currently used in a wide range of applications, and have high reliability and performance, and the cross-array form can also ensure high efficiency. However, the design process of the LED lamp driver in the hybrid form is cumbersome, and the current must be shared in the circuit during normal operation. The setting of LED street lights on the driving power also needs special attention. At present, LED street lights have two forms: AC power supply and solar LED. The advantages of solar LED are that the load is small and the interference is small. LED drive power is usually able to convert AC voltage into DC voltage, while paying attention to the matching with the current. In the context of a small number of street lamps, the operation and design of the driving power supply is relatively easy. When the number of street lamps is used in a large number, the feedback control of the driving power supply should be strengthened.
04 Evaluation of the quality of LED street lights
From the perspective of the needs of road lighting users, the most essential responsibility of road lighting is to serve road users at night, which is also the most basic starting point for builders to plan, design and implement road lighting projects. According to the description of the standard values of lighting for motor vehicle lanes, intersection areas, sidewalks and non-motor vehicle lanes in "Urban Road Lighting Design Standards" (CJJ45-2015), it is possible to objectively evaluate whether the lighting effects of the designed lamps meet the standards.
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