Smart Grid Implementation in Sacramento IEEE Smart Grid

14 Июн 2014 | Author: | Комментарии к записи Smart Grid Implementation in Sacramento IEEE Smart Grid отключены
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Smart Grid Implementation in

Details Written by Jim Parks

little prior experience to from other energy the Sacramento Municipal Utility is trying out a wide array of grid technologies. The goal is to a roadmap for large-scale deployment. elements include smart time of use and peak pricing, islanding and energy storage.

The Municipal Utility District is an electric-only municipal utility a service territory covering 900 miles in the heart of California. serves over 600,000 including six cities and the County of

Awarded almost $150 in grants for smart grid with a total budget of million, SMUD is beginning smart grid deployment that include advanced infrastructure (AMI), distribution enhanced cyber security, vehicle infrastructure, customer and demand response initiatives. and development projects include storage, dairy digesters and a The project, trademarked SmartSacramento, is the step in what will be an deployment of smart grid and features at SMUD.

SMUD’s AMI is fully deployed and utilizes Spring Networks and Landis+Gyr One of the many benefits provided by AMI is the to provide dynamic ratesboth of use (TOU) and critical peak (CPP). Prior to AMI implementation, rates could only be through commercial meters and not available to residential customers.

The new meters allow for the two-way of information that allows to retrieve meter data at intervals and to provide signals or through the meter. Should adopt dynamic rates on a commercial basis, TOU structures can be into the system and CPP signals can be to all customers, both residential and Such special rates prompt customers to reduce energy usage, reducing on the electrical system.

SMUD has pilot TOU/CPP rates, almost 3,000 customers a CPP or TOU/CPP combination and another customers a TOU rate. The CPP has a ten-to-one ratio between critical periods and off-peak periods. The price is about 7.2 cents/kWh and the peak price is 75 cents/kWh.

The CPP will be implemented up to 12 peak per summer, 4-7 PM, Monday-Friday. Randomly customers were sent on the pilot and some were to opt in while others were to participate, but allowed to opt out.

The trial rates were in June 2012 and will in effect through the summer of The pilots will be evaluated and the used to determine the next The expectation is that customers cut peak-period energy use to some we are conducting the pilots to determine how SMUD has reviewed other pilots, which have wide-ranging results.

One major showed that customers interest in TOU rates and ultimately responding, while customers on CPP tend to shift loads they get notification of an event and a large differential between and off-peak prices.

AMI also automatic connect/reconnect, voltage throughout the service territory, loading information (once are mapped to transformers), outage and transmission of improved energy to customers. The automatic connect/disconnect alone has reduced truck of personnel to connect or disconnect to or from SMUD’s systemby 55,000 in less than one

With well over a of experience, most utilities to be informed about power through customer telephone A small number of calls means a small outage; calls indicate a large Customer service representatives information and troubleshooters are dispatched to the outage and make the necessary

A crew may be dispatched if there is work required to restore Smart meters have a gasp feature that system operators to immediately see and where outages occur. line personnel can be dispatched customers even call.

software will eventually be to analyze the location and number of that are without power, a determination as to which piece of caused the outage and dispatch to the precise location of the outage. will reduce the duration of With large outages, are often smaller, embedded Imagine, if you will, a scenario 5,000 customers lose due to a downed line.

Within outage event, a tree causes a smaller outage is not restored when the original is restored. With automation, the can see both events and knows it additional work to complete the Otherwise, the utility won’t about the smaller outage customers complain.

With AMI, the utility can the meters once power is to verify that all meters are and there are no embedded outages. approach also saves rolls.

In all, SmartSacramento of 8 project areas with 50 subprojects. Examples include:

A in which the critical element be testing a smart switch to island the grid from the utility system. The microgrid as a consists of three 100 kW gas engines, 10 kW of generation, a 760,000 gallon water thermal energy tank, an absorption chiller, a utility plant and battery storage.

Energy storage will be tested in a solar with over 280 homes, with PV rooftop systems in size from 2-4 kW. Of these 42 are partially powered by batteries: 15 by of 10 kW/8.8 kWh lithium ion batteries at each residence; 27 by being to one of three community energy systems, rated at 30kW/30kWh and next to distribution transformers. A 500 kW battery is scheduled for installation at the

The storage will be used to the flow of energy from renewables, reduce peak and improve reliability.

Dairy popularly known as poop to generate electricity by converting waste to a methane-rich biogas. The is piped to a biogas engine and generator. Two projects are underway will jointly generate 1.2 MW the waste of 2,400 milk

Since many smart technologies are new and expensive, little on technology benefits, cost-effectiveness and are available from actual implementations. SMUD’s smart projects will be evaluated and collectively to help determine benefitscost-effectiveness, utility benefits as reduced duration or frequency of reliability improvements and energy and customer benefits (for better control of energy energy savings and general The evaluation results will be to develop an implementation plan will guide future grid deployments.


Jim Parks . an IEEE member, is a manager in the smart grid at the Sacramento Municipal Utility His current focus is on determining grid benefits in order to a long-term roadmap for SMUD. He oversees the utility’s commercial smart grid projects. to his current assignment, he worked on energy efficiency technologies, transportation, energy efficiency development, energy efficiency and transmission planning.

He has a bachelor’s in electrical and electronics engineering California State University,

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