Introducing lighting controls into a demand response strategy

Intelligent light control systems make lighting predictive, responsive, and linear—and demand response simpler and more economical.

02/25/2013


In basic terms, demand response (DR) is a strategy for managing customer electricity consumption in response to fluctuations in the electrical supply. The overarching goal of DR is to keep electricity supply at a steady and controllable state, and the impetus for DR implementation can vary. It can be motivated by a temporary need to avoid outages resulting from environmental factors (environmental DR) or a more permanent need to manage daily electricity usage for economic considerations. Because electricity is a traded commodity, its price is set by basic supply and demand, and managing daily peaks has an economic advantage (economic DR).   

Figure 1: According to Enerlogic Networks Inc.’s Demand Response Operations Model, regional differences define how DR programs are administrated. Courtesy: Lutron Electronics, based on Enerlogic Networks Inc.Companies are motivated to participate in DR programs based on a variety of factors including how much of their own electricity they produce and the on-site systems that enable them to control, generate, and/or store regulated power. Depending on the area of the country, a company may be dealing directly with the utility bulk supplier (like the manufacturer) or a third party—either a regional transmissions operator (RTO) or independent systems operator (ISO) that coordinates, controls, and monitors grid operation with the use of curtailment service providers (CSPs) that interface with the facility (see Figure 1). Any or all of these entities may be involved in the setup, administration, and control of the DR programs in a given area. Participation requirements, program flexibility, and the existence of nonparticipation penalties vary depending on location, creating a veritable smorgasbord of programs to choose from.

Regardless of which program a company chooses, the higher the risk, the higher the reward. In other words, the faster a company can react to a demand event, the more attractive the economic payback. The incentive to participate may be even greater if a company produces much of its own power, as in a micro-grid. In a micro-grid, a company is responsible for balancing its own power requirements for its building demand independent of the utility. As micro-grids do not have the benefit of gross aggregation to provide a cushion against fluctuations in demand of single buildings, a predictive state and quick reaction to demand events are critical goals. 

Demand response and energy savings

DR often is confused with energy savings. The two can be linked, but they are not interchangeable. The overall goal of DR is to keep the electrical supply at a steady and controllable state, but not necessarily to save energy. It is not unusual, however, for the temporary strategies put in place to achieve DR goals to become permanent strategies to save energy, especially when lighting DR is employed. Annually, lighting and HVAC use in commercial buildings are essentially equal, and both can contribute to an effective DR strategy. But unlike HVAC curtailment, lighting power can be reduced quickly and managed easily, delivering immediate response levels that HVAC can achieve only over time. In addition to responding to demand events, lighting DR strategies also deliver significant energy savings by immediately reducing lighting power with no recovery period required to return to pre-demand levels. The benefits of using both HVAC and lighting DR strategies will be examined in Part II of our series.


Scott Ziegenfus is a senior applications engineer with Lutron Electronics Co. Inc. Ziegenfus has an electrical engineering degree from Lafayette College. He is an educational programs chair and board member for the Delaware Valley Chapter of the U.S. Green Building Council and is a certified LEED Study Guide Facilitator. Ziegenfus also serves on ASHRAE standards committees SPC 201P–Facility Smart Grid Information Model and SSPC 135–BACnet.



No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2013 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Leaders Under 40 program features outstanding young people who are making a difference in manufacturing. View the 2013 Leaders here.
The new control room: It's got all the bells and whistles - and alarms, too; Remote maintenance; Specifying VFDs
2014 forecast issue: To serve and to manufacture - Veterans will bring skill and discipline to the plant floor if we can find a way to get them there.
2013 Top Plant: Lincoln Electric Company, Cleveland, Ohio
Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Plant Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.

Bring focus to PLC programming: 5 things to avoid in putting your system together; Managing the DCS upgrade; PLM upgrade: a step-by-step approach
Balancing the bagging triangle; PID tuning improves process efficiency; Standardizing control room HMIs
Commissioning electrical systems in mission critical facilities; Anticipating the Smart Grid; Mitigating arc flash hazards in medium-voltage switchgear; Comparing generator sizing software

Annual Salary Survey

Participate in the 2013 Salary Survey

In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.

Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.

2012 Salary Survey Analysis

2012 Salary Survey Results

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.