CSA EXP 05-15:2018 pdf download.Methodology for evaluating energy savings from use of adaptive controls in street lighting applications
4 Current situation
Many municipalities in Canada have installed or will be installing new light-emitting diode (LED) street lighting luminaires on their streets and laneways. The primary purposes for the use of LEDs, versus other light sources such as high-pressure sodium (HPS) lamps, are to improve the control of wasted light, glare, and light trespass, as well as to realize a significant reduction in the cost of energy used for street lighting. With the changeover to LED, it is a simple matter to evaluate the energy cost savings and make new billing arrangements with the energy distribution utilities that supply power to these municipalities.
Some of these municipalities, however, are also installing, or are investigating the possibility of instaling, adaptive lighting controls that would enable programmed reductions in lighting levels during periods of the night, as described in ANSI/IES RP-8. While additional energy savings could be realized by using adaptive controls, it is difficult to come to agreement with an electric utility company on a process for evaluating the actual energy consumption of luminaires with adaptive controls. Even though the street lighting might consume less energy as a direct result of the municipality's investment in adaptive controls, the actual monetary savings to the municipality might not be realized, due to the lack of a prescribed method of calculating or measuring energy usage.
5.1.3.3 Central management systems
The central management system (sometimes referred as the“management station") consists of one or more host computing platforms that access and remotely manage field devices. These platforms facilitate user interaction through graphical user interfaces (GUIs) and consolidate and store retrieved data. Many vendors also provide a web user interface to the CMS for easier access. Data can be hosted by the municipality, the utility, or both, and by the manufacturer or a third party. The CMS can use proprietary communication protocols or standardized protocols, which allow for multiple vendors' solutions.
5.1.3.4 Network infrastructure
Central management systems communicate to field devices through a network infrastructure, consisting of one or more backhaul communication networks that use various mediums (e.g., wired and wireless).As of 2015, each vendor has its own proprietary backhaul communication network protocol, but the industry is working toward developing common open standards. Selecting field devices that are interoperable and interchangeable is obviously a priority. The industry is developing specifications for open IT standards and communication protocols that will allow interoperability at the CMS level, so that a municipality can use a single, common user interface to monitor and interact with multiple networks and controllers from various vendors.
Common data networks include star and mesh configurations (topologies).CSA EXP 05-15 pdf download.