Global Embedded Conference India Saturday, 21st May, 2011

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Presentation transcript:

Global Embedded Conference India Saturday, 21st May, 2011 Session 2: Industrial Smart Grid and Metering: Challenges in developing Smart Meters Global Embedded Conference India Saturday, 21st May, 2011

Smart Grid A smart grid is a form of electricity network using digital technology. A smart grid delivers electricity from suppliers to consumers using two-way digital communications to control appliances at consumers' homes; this could save energy, reduce costs and increase reliability and transparency Smart metering, forms a part & pre-requisite of larger Smart Grid concept. In Smart Grid implementation Gov/utilities are considering overall improvement of efficiency/quality of supply reducing carbon footprnt managing peak demand facility to include distributed  & large number of renewable energy Sources (wind, solar..) in grid.., total remotely manageable devices Source: http://www.theenvironmentalblog.org/wp-content/uploads/2009/03/smart-grid.jpg

Smart Meters Energy meter is a device that measures the amount of electric energy consumed by a residence, business, or an electrically powered device. Electricity meters are typically calibrated in billing units, the most common one being the kilowatt hour. First energy meter was produced during 1889, Earlier meters were based on electromechanical form, using an induction disk whose rotational speed was made proportional to the power in the circuit. But now the industry is moving towards smart meter. In few countries, they are installed and in few countries they are mandated to install over some period 2013 to 2020. Meter Demand Projection between 2008-2012.(Source ABS Energy Research)

Why Smart Meter? Improve consumers’ ability to monitor and control their electricity use, potentially allowing for cheaper and more efficient energy use Reduce the overall maintenance cost to service providers The basic elements of a Smart Utility Meter are the same as those of a Basic Utility Meter. However, the Smart version differs from the Basic one in terms of its capability to communicate more efficiently with the outer world, ability to control and monitor individual appliances, more processing capabilities and memory, enhanced tamper protection and security features

Why smart meter design is challenging? No more the energy meters are providing just energy consumed. They are becoming a ‘data points’ The metrology function in the meter measures and computes instantaneous power, and time-integrated energy use of the end-user The advanced metrology function processes, and transforms this measurement data into a series of metrological quantities. 5

What do these data points means to the system design? Smart meters measures or creates following data points Import and export of electricity, both billing rates could be different Current RMS voltage/current value, min/max voltage/current over period KW imported/exported, KWArQ1,2,3,4, KWA Active energy imported/exported, Reactive Energy 1Q, 2Q, 3Q, 4Q, Net active energy (active energy received – delivered) Demand, Min/Max demand Apparent energy values Min/Max power factor (leading/lagging) Firmware also supports Pulse output to indicate consumption of active or reactive power Time of Use Load profile Calendar based activity scheduler Remote disconnect Event logger What do these data points means to the system design? Need high performance CPU Better memory at lower cost Real time operating system Optimized foot prints Smart meters are having over 100MHz processor speed, 256K flash, 128K RAM memory

Challenge in developing Smart Meter Mixed Development Approach: NPI, Value Engg, Re-engg, Reverse Engineering Convergence of Technologies Manufacturability Reliability Regulatory Standards 7

Mixed Development Approach The key development is becoming a mix of NPI, re-engineering, value engineering and Reverse Engineering with aggressive time lines. NPI – in some cases, the product packaging may not be available, and concepts needs to be created, this cycle needs creative knowledge as well as ability to create many options Re-engineering – the company which develops the meter has the knowledge and basic design of meter which it in turn try to reuse the block which are reusable Value Engineering – smart meter products are having aggressive target cost, Typically the value engineering programs in other domains like automotive are taken up on the product which are generally built already, with clear target for material, process reduction targets the value engineering is addressed. But in case of smart meters, the value engineering has to be performing along with main product development. The typical cost target for finished electronics with all components including the printed circuit board is less than USD 10, with additional USD8 for PLC cost of component. The typical cost target for finished mechanical enclosure with all components including the fastners is less than USD5. Even the typical product assembly time is expected to be less than 6 mins.

Convergence Convergence – meters are expected to have features like Zigbee, WiFi, GPRS, display console, tilt detection (accelerometer), data storage etc., Most of these features are common among the consumer products. So there is a kind of convergence being happening between communication, consumer and industrial product. Some of these interfaces are proven working in consumer market, but in industrial environment these interface can impact the performance of the core meter functionality. Also some of these interfaces need higher processing power at lower cost.

Manufacturability Manufacturability – the volume being high, the manufacturability is another key aspect of the smart meter product development. Both tool based or manual method to cross verity the manufacturability can be followed. Typical manufacturability issue may lead to spin, each spin cost material as well as schedule slip. It is preferable to initiate 2nd spin itself at customer preferred EMS facility (early migration to EMS) to know the issues related to manufacturability.

Reliability Reliability – Since the very beginning meters are high reliable electromechanical meters, the expectations of smart energy meters are higher than earlier meters, the product development cycle needs to include the reliability estimation/analysis and testing. The typical reliability expectation is are over 15 to 20 years

Regulatory Regulatory Standards – expectation is to meet many standards like UNE-EN 62053/2/4/8-xx, 62056-xx, these standards calls for a list of test and equipment needs to meet the performance while the test being conducted. The energy meter design needs to consider the protection mechanism against these test pulses or conditions. Typical failure on regulatory will lead to respin, each spin cost one material as well as timelines of the development. Since the number of test being higher, the lab infrastructure planning has to be well taken to avoid the risk of not meeting the deadlines.

Conclusion In summary Smart meter development will demand for high quality, low cost, reliable, manufacturable, certified product within short time Hybrid development approach would help in development With additional focus on cost, manufacturability, reliability and regulatory demands

Thank You