Demand response in Quebec s CI buildings: potential and strategies
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1 Demand response in Quebec s CI buildings: potential and strategies Team: Ahmed Daoud, Ph.D, project manager Marie-Andrée Leduc, MSc., ing, task manager Jean Baribeault, ing, researcher Karine Lavigne, MSc.A., ing, researcher Sylvain Chénard, technician Alain Poulin, MSc.A., researcher Sylvain Martel, Ph.D, ing. jr., researcher Adlane Bendaoud, Ph.D, researcher October 1 th 213 ICEBO213 1
2 Hydro-Québec s Research Institute > 2 sites IREQ Laboratoire des Technologies de l énergie > 5 employees 26 scientifics 12 technicians > Seven fields of expertise Electrical equipments Material science Robotics and civil works Mechanics, metallurgy and hydro-wind Measuring and information systems Electric networks and mathematics Utilization of energy 2
3 Project : SGE Building Software Increase EE in CI buildings Optimze HVAC systems (both energy and peak management) Help building operators (fault detection) at ICEBO 213 Calibration of an EnergyPlus building energy model Lavigne, Karine; Sansregret, Simon; Daoud, Ahmed LTE, Hydro-Québec SGE Building Software Nouanegue, Hervé Frank Daoud, Ahmed 3 Groupe Technologie, Hydro-Québec LTE, Hydro-Québec 3
4 Demand response in CI buildings 4
5 What is DR? why use it? Demand response according to FERC [2] : Changes in electric usage by demand-side resources from their normal consumption patterns in response to changes in the price of electricity over time, or to incentive payments designed to induce lower electricity use at times of high wholesale market prices or when system reliability is jeopardized Winter Three historical peaks Jan 23 rd am/pm, Jan 24 th am ~ 39 MW [2] 5 Groupe Technologie, Hydro-Québec 5
6 Why call upon CI customers? more kw/meter some all-electric (common in Qc) more control capabilities (BAS) centralized management corporate image Others Space Heating (residential) Space Heating (CI) DR Strategies Large industrial Small industrial Water Heating (residential) [3] Kiliccote, S. et al, 29, Northwest Open Automated Demand Response Technology Demonstration Project, Environmental Energy Technologies Division, LBNL, avril 29 6 Groupe Technologie, Hydro-Québec 6
7 Previous work Demand profiles caracterisation and DR potential > Study real demand profiles per activity sector for caracterisation > Estimate theoretical DR potential per activity sector HVAC based DR strategies > Use building simulation to evaluate DR strategies and study possible ways of optimizing preset systems setpoint profiles 7 Groupe Technologie, Hydro-Québec 7
8 Demand profiles caracterisation and DR potential - Samples Activity sector Clean sample size (N) Arena 35 Library 12 Office 27 Healthcare* 8 Cinema 2 Retail 132 Small convenience 337 Groceries store 2 University 8 School 1944 *long term care facility 8 Groupe Technologie, Hydro-Québec 8
9 Demand profiles caracterisation and DR potential - Methodology Clustering of samples Typical demand profiles - 16/1/29 cluster 1 cluster 4 cluster 3 cluster 2 Market data 8 Demand [kw] Theoretical DR potential Hour 4 kw 3 Demand reduction (%) DR potential DR potential - 16/1/29 AM Max Demand [kw] DR potential - 16/1/29 PM cluster 1 cluster 2 cluster 3 2 Pmax, Ppeak x P x DR _ POT max, peak, x P moy, peak mean,, peak, x DR _ POTtheoretica l = max theoretica l =, x = [ ampm, ], x = [ am, pm] PP 1 max, peak peak, x, x heures Date DR potential DR potential < 5 kw 5-1 kw 1-5 kw Max Demand [kw] A M P M 28 % (7 kw/bldg) 28 % (6 kw/bldg) 21 % (14 kw/bldg) 22 % (12 kw/bldg) 16 % (42 kw/bldg) 17 % (37 kw/bldg) Other methods [4] Goldman, C. et al., A methodology for estimating large-customer demand response market potentiel, LBL, August 27 [5] Brattle, A national assessment of demand response potential, by The Brattle Group for FERC, June 29 9 Groupe Technologie, Hydro-Québec 9
10 Demand profiles caracterisation - Clustering Data (clean, normalized profiles) Clustering using Fuzzy logic clustering algorithm Why fuzzy? The membership scores allow us to idenfity a real typical demand profile for each cluster Fuzzy c-means algorithm was used Allocation of profiles to their dominant cluster Membership scores Per activity sector matrix Per peaking days (29, 211) Clustering of electric demand profiles. [6] Yamaguchi, N. et al. Regression Models for Demand Reduction based on Cluster Analysis of Load Profiles, presented at IEEE-PES/IAS Conference on Sustainable Alternative Energy, Spain, Sept 29 [7] Valero, S. et al. Methods for customer and demand response policies selection in new electricty markets, IET Gener. Transm. Distrib., Vol. 1, No. 1, Jan 27 [8] Chicco, G. et al., Comparisons Among Clustering Techniques for Electricity Customer Classification, IEEE Transactions on Power Systems, vol 21, no 2, may 26 1 Groupe Technologie, Hydro-Québec 1
11 ESL-IC Demand profiles caracterisation Clustering Normalized demand profiles - cluster 1 (45 meters) - 16/1/29 Normalized demand profiles - cluster 2 (48 meters) - 16/1/29.4 Normalized demand Normalized demand SCHOOL Hour Normalized demand profiles - cluster 4 (665 meters) - 16/1/29 Normalized demand Normalized demand Hour Normalized demand profiles - cluster 3 (466 meters) - 16/1/ Hour In the future.3 Overall shape?.2 Coincidence with grid peak? Hour Normalized demand profiles - cluster 4a (182 meters) - 16/1/29 Normalized demand profiles - cluster 4b (46 meters) - 16/1/ Further cleaning of samples.4 Normalized demand Sub-sampling based on weather sensitivity[9] Normalized demand Hour Hour Normalized demand profiles - cluster 4c (46 meters) - 16/1/29.4 Normalized demand Increase sample sizes Hour [9] Coughlin, K. et al. Statistical analysis of baseline load models for non-residential buildings, Energy and buildings, 41, Groupe Technologie, Hydro-Québec 11
12 Demand profiles caracterisation Typical demand profiles Typical demand profiles - 16/1/29 cluster 1 cluster 4 cluster 3 cluster 2 Demand [kw] SCHOOL Hour Typical demand profiles used to simulate typical buildings and estimate Typical demand profiles, cluster 4-16/1/29 cluster 4a cluster 4b Impacts on customers (comfort / financial) Demand reductions of strategies during peaking hours Demand [kw] Hour 12 Groupe Technologie, Hydro-Québec 12
13 Theoretical DR potential - example Per Customer size Per Cluster Date DR potential < 5 kw 5-1 kw 1-5 kw Date DR potential A M P M 28 % (7 kw/bldg) 28 % (6 kw/bldg) 21 % (14 kw/bldg) 22 % (12 kw/bldg) 16 % (42 kw/bldg) 17 % (37 kw/bldg) A M P M 18 % (26 kw/bldg) 21 % (24 kw/bldg) 28 % (25 kw/bldg) 25 % (2 kw/bldg) 38 % (18 kw/bldg) 37 % (15 kw/bldg) 12 % (11 kw/bldg) 14 % (11 kw/bldg) DR potential - 16/1/29 AM cluster 1 cluster 2 cluster 3 4 Demand reduction (%) Max Demand [kw] 1 DR potential - 16/1/29 PM Demand reduction (%) DR potential - 16/1/29 AM Max Demand [kw] DR potential - 16/1/29 PM cluster Max Demand [kw] Max Demand [kw] 13 Groupe Technologie, Hydro-Québec 13
14 Theoretical DR potential +. Simple Applicable to large data samples Mean DR_POT can be calculated for customer sizes and clusters Independant of specific strategy since systems are unknown -. Accounting only for variations of demand during strictly defined peaking hours Conservative (?) 4 days analysis Mean relative DR_POT vary slightly but major differences are mainly associated with varying opening hours for certain activity sectors In the future. Influence of different weekday selection, extending peak hours, +/- variation Overall good caracterization of customer valid first estimation of DR potential better targeting for DR participants 14 Groupe Technologie, Hydro-Québec 14
15 HVAC based DR strategies Multi-objectives genetic algorithm (JEPlus 1.4) 6 objective functions 13 variables 4 simulations HQ index Customer index T air index IAQ index (3x) HQ Index HQ Index = X IAQ Index HQ Index = X Customer Index HQ Index 15 Front Pareto de Pareto front 15
16 HVAC based DR strategies 3 25 OFFICE Optimized strategy A = 26 kw Optimized strategy Baseline Global temperature adjustment Systemic adjustment to air distribution and heating systems Demand (kw) 2 15 B = 113 kw mean moy Incudes: Preheating, preventilating, ZAT adjustment, boiler temperature adjustment, OA shut off 1 5 Building caracteristics: 4 ft 2, 1 stories, 5 zones, 3 systems DR_POT theoretical = 27 kw versus DR_POT max = 147 kw 16 DR_POT mean = 14 kw 16
17 Ongoing work > Aims Improve our estimation of the theoretical DR potential for the most interesting activity sectors and those not already covered Verify the feasability of HVAC DR strategies in real buildings through a demonstration project Study baseline calculation methods 17 Groupe Technologie, Hydro-Québec 17
18 Demonstration Project Objective Verify the feasability of DR strategies in real buildings through a multi-buildings, multi-systems demonstration project * All-electric buildings Surface area [ft 2 ] Max demand [kw] HVAC systems to be controlled Central RTU Base board Unit heater School x x x x Retail x x Bank x x Retail x x x x Office 21 n/a x x x 18 Groupe Technologie, Hydro-Québec 18
19 Demonstration Project - Methodology Recruitment Technical survey of facility Simulation/calibration of a baseline model Simulation/optimisation of DR strategies Implementation of DR strategies in BAS Four DR events during peaking season o prescheduled events or 24h notice, semi-auto DR Demand reduction evaluation 19 Groupe Technologie, Hydro-Québec HVAC based DR strategies RTUs cycling ZAT setpoints adjustments with preheating CO 2 setpoints adjustments with overventilating OA limiting 19
20 2
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