Demand Side Management using DLC Communication. i I

Transcription

1 Demand Sde Management usng DLC Communcaton

2 Abstract: Stadtwerke Dusseldorf AG (Germany) wth approx. 400'000 consumers has decded to mplement a program for Demand Sde Management (DSM) usng ther low voltage network as a communcatons medum. As a frst step, Stadtwerke Dusseldorf AG started remote readng of meter data from. ndustral and commercal customers n the medum and low voltage network. The processed data wll be dstrbuted to customers n order to help them to optmse ther energy consumpton and to reduce ther costs. The program has been expanded to use the 2-way communcaton system also for load control, tarff swtchng, and for remote meter readng of other types of energy (water, gas, etc.). To attan maxmum proftablty from the nvestment n the b-drectonal customer communcaton system usng Dstrbuton Lne Carrer (DLC), the system wll also be used as a bass for future Value Added Servces WAS) such as Securty and Alarm montorng. Wth ths project Stadtwerke Dusseldorf AG wll gan valuable experence n provng the behavour and relablty of data transmsson n the low voltage network usng DLC. Furthermore t wll be verfed whether the Electromagnetc Magnetc Compatblty durng operaton n a harsh envronment s granted. - For the techncal realsaton and mplementaton of the DLC customer communcaton system Stadtwerke Dusseldorf AG has selected Lands 8 Gyr (Europe) Corp., whch has the necessary know-how and experence, wth ther product DATAGYR~ AMDES (Automatc Meter Data Exchange System).. Presentaton of Stadtwerke Dusseldorf AG Dusseldorf wth 520'000 habtants s the captal of the dstrct Nordrhen Westfalen n Germany. DOsseldorf s a world wde trade centre (Rhne-port) and s also well known as an n- ternatonal congress and exhbton centre. Unque socal sghts, only to be seen n Dusseldorf are: the!jth season; Carnval begns on.... the lovely Old Town: the longest bar of Europe wth the famous "Altbef

3 Stadtwerke Dusseldorf AG s a large muncpal utlty wth the followng key fgures: energy suppler for 400'000 consumers: - electrcty (own producton by coal)! - water - gas - dstrct heat turnover: '508 Mllon DM (approx. '000 Mllon US$). 3'600 employees open for new strategc felds of actvtes: from an energy suppler to a servce provder / : Rhne-port Others % 0.2% Waste Dsposal Dstrct heat 3% Turnover '508. Mo. DM Electrcty 6.8% % Electrcty supply: energy consumpton (MWh) 4' 80'432 - resdental (tarff) customers 33% - ndustral / commercal customers 44% - large ndustral customers number of meters nstalled 406'700 j number of street lghts 4 '000 power lnes (kvolt) 0/25/ 00.4.

4 2. User Requrements for a DLC based Communcaton System Stadtwerke Dusseldorf AG defned followng man requrements or applcatons re-, spectvely for a 2-way communcaton system: meter readng for ndustral commercal customers servces for resdental customers preparaton for new requrements n the deregulated market value added servces use as much as possble the own network,.e. the energy supply network, for the data transmsson n order to reduce the operaton costs and to be ndependent from thrd partes. Stadtwerke Dusseldorf AG started the evaluaton of products from several manufac- turers. The fnal decson was made n summer 995 by selectng the product DATAGYR@ AMDES from Lands & Gyr (Europe) Corp., for the followng man reasons: the system conforms to nternatonal standards, permts easy extenson, and matches to dfferent communcatons technologes necessary functonalty avalable remote operaton and supervson reduces ste vsts and non-productve workng hours for daly travel the system s a result of many years of experences, testng, evaluaton, and evoluton n close partnershp wth utltes playng a leadng role many reference nstallatons are avalable, 3. Techncal Realsaton and mplementaton The techncal realsaton and mplementaton s based on AMDES whch s a flexble system for 2-way data communcatons n energy supply networks for utltes. AMDES lnks the measurng and control ponts n a power dstrbuton network wth the central staton of the utlty and permts communcaton wth the customers or energy consumers respectvely, enhancng customer goodwll. t s a system that provdes solutons to the utltes, helpng them to mprove the operatonal effcency by optmsng ther processes. 65 r

5 The AMDES concept provdes utltes wth a complete system that can be talored to ndvdual needs. Concept and Archtecture External System (e.g. Bllng System), WAN (e.g. telephone, dedcated lne, rado) Regonal Concentrator! Meter Communcaton Unt Termnal Unt (e.g. meter, tarff devce, load, etc.) Man Functonalty of the Unts a) Central Staton (DATAGYR~ C2000) - automatc or manual data acquston, processng and transfer ~ - C2000 offers the necessary functonalty for the admnstraton, confguraton and operaton to the users va the man machne nterface (MM) - the scheduler performs automatc tasks n order to releve the operator(s) from routne tasks - the database s a key element, storng all confguraton, operaton and acqured data - meter data can be converted and transferred to external systems b) Regonal Concentrator (RC),, - the RC acts as the master and admnstrator of a low voltage network and com- muncates on one hand va the standardsed Dstrbuton Lne Carrer (DLC) method wth the MCUs connected to ths network (LAN) and on the other hand va

6 WAN (swtched telephone lne (publc or prvate), dedcated or leased lne, rado lnk, etc.) wth the C2000 usng standard transmsson protocols V - the RC acts as a slave of the C2000 and controls the assgned MCUs. t auto- matcally carres out the tasks assgned to t by the C2000. t gathers the data re- quested from the MCUs and stores these data n the non-volatle nbound buffer to \ ' the C2000 untl they are collected from there - the RC s an ntellgent controller and s able to run the downloaded tasks nde- pendently,.e. wthout permanent communcaton wth the C2000. There are task \ lsts for commands that have to be executed at a specfc tme of the day, at spe- cfc tme ntervals or mmedately. A task can be defned for a group of MCUs or for an applcaton type, - all RCs can execute ther tasks n ther network sectons smultaneously and ndependently of one another, whch allows AMDES also to handle bg energy sup- ply network wth a lot of measurng and control ponts -, - the RCs perform automatc synchronsaton of the real-tme clocks n the MCUs c) Meter communcaton Unt (MCU) - smultaneous readng of meter values from varous energy carrers (Electrcty, Water, Gas, Dstrct Heatng, :...) and transfer of the data to the RC - tarff and load control va spontaneous commands from the C2000 or locally stored predefned programmes down loaded from the C dual rate tarff capablty for sngle tarff meters - n addton to the normal functons, every MCU n the network can f necessary act as a repeater, whch ensures communcaton between the RC and very dstant MCUs - Whether an MCU has to act as a repeater or not and the number of repettons are defned and adapted dynamcally by the system accordng to the.characterstcs and topology changes of the energy supply network - The.MCU requres no battery. The mportant data s stored n a non-volatle mem-. ory durng a long power outage '

7 4. Plot nstallaton The AMDES plot nstallaton for Stadtwerke Dusseldorf AG conssts of the followng equpment: Number Type ', Central Staton (DATAGYR~ C2000) 2 Regonal Concentrator (RC) 0 Meter Communcaton Unt (MCU) 0 electrcty meter (ZMB) wth data nterface (CS accordng to EC 07) 2 water meter wth pulse emtter (SO accordng to DN 43864) j gas meter wth pulse emtter (SO accordng to DN 43864) The C2000 has been nstalled at the headquarters of Stadtwerke Dusseldorf AG, whle the other unts have been nstalled n 2 dfferent low voltage networks n the! centre of the cty.! ' The 2 RCs are connected to the C2000 va dedcated lnes (length approx. 6'800 m - and 400 m). The DLC communcaton n the low voltage networks s on A cables (4 x 50 mm2). The dstances between the connected unts RC t, MCU and MCU t, MCU are approx: m. The plot nstallaton was presented at the NTERKAMA '95 exhbton n Dusseldorf wth a lve demonstraton n cooperato G yr. tadtwerke Dusseldorf AG and Lands & ' J 5. Results Stadtwerke Dusseldorf AG made the followng frst experences wth the nstalled 2- way communcaton system: the DLC communcaton n the low voltage networks worked well rght from the! begnnng. 68 t

8 r dfferent departments. (e.g. communcaton, grd plannng, meterng...) were nvolved, accompaned and supported the tral run from the begnnng the tral of transmttng DLC sgnals va a specfc developed couplng element between neghbored low voltage networks was a success barrers:., because of the carrer frequences (60 khz and 74 khz for plot system) used for the DLC communcaton, the "State Authorty for Telecommuncaton and Postn (BATP) classfed DATAGYR~ AMDES as a rado system + ths needed specal condtons for frequency allocaton and approval (n the meantme the approval has been granted) - requred accredtaton by PTB (the authorty for weghts and measures) 6. Concluson and Outlook After havng tested the 2-way communcaton wth AMDES for several months n the real envronment Stadtwerke Dusseldorf AG came to the followng concluson: the plot project was a success and showed the feasblty of relable communca- tons on the energy supply network decson was made for further nvestments, e.g. - nstallng report and graphcs modules on the C extend number of RCs and MCUs especally for low voltage-suppled ndustral commercal customers (next phase approx. '200) addtonal applcatons: - tarff management - servces for resdental customers new felds of actvtes: - heat allocaton servces - performance contractng \ Due to the postve results of the plot project, and the fact that utltes are faced wth today's changng busness envronment n a deregulated market, ths project can be seen as the starter for mplementng the Demand Sde Management usng the low voltage network as a communcaton medum n Dusseldorf.