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Development and Optimisation of Demand-Side Control
Algorithm for Micro-cogeneration System
Student: Mr Jun HONGSupervisors: Professor Joe Clarke, Cameron Johnstone
RPD 2006
Crisis!
危 ( wei )
机( ji )
Challenges! Opportuniti
es?
Challenges
• Demand shoots-up;
• Electricity Black-outs;
• Fuel shortage;
• Global warming.
Research Issues
• Embedded Generation– Micro-CHP;– RETs, like PV, wind turbine, heat pump, etc.
• Demand-side Management– Energy conservation technology– Load Management
Specific issues of my research• Optimisation of Micro-CHP Operation
– Load dynamics(low efficiency; more CO2 emissions; less
durability)
• Development of DSC Algorithm (*)– Reduce the demand;– Micro-CHP-friendly operation load profile;– Demand-follow-supply energy structure;
What is DSC?
• Purpose– Maximize the match between supply and demand;– Minimize the impact of users;
• Methods– Change the pattern of uses (Demand Relocation);– Implement switching strategies (Demand Control,
Load Growth);
• DSC applications for different levels of demands– Aggregated demands (multi-families households);– Individual demand (single family household);
DSC Algorithm
Start
= 0
Demand v.s. Supply
Storage/Battery
< 0
Despatch
Invoke DSC algorithm
Favorable Demand Profilefor supply operation
> 0load
reductionload shiftLoad properties
Shift Increment
Shift Boundary
Load priorities
Load Growth
Control method
Control duration
Appliances Properties Load No Control On/off Partial Time
AvailabilityHot water X X Hour/ Min HighWashing machine X X Hour/ Min HighTumble dryer X X Hour/ Min HighDishwasher X X Hour/ Min
HighFridge/ freezer X Min HighTowel rails X X Min HighElec. Apps. (with chargers) X X Min HighLighting X X Min/ Sec HighElec. Apps. (heating) X X Sec High
Electric oven/ hob X X Min MediumSlow cookers X X Min MediumElec. heating X X Min MediumAir conditioning X X Min MediumElec. blanket X X Min MediumMicrowaves X Sec Medium
Extractor fans X Sec LowHairdryers X Sec Low
Elec. Apps. (instantaneous) X NoneEntertainment X None
How to implement?
What the results we got so far?
Before DSC
After DSC
Results of Match Rate
Next Step…
• Refinement of CHP models (consider the by-product generation, two views);
• Refinement of DSC algorithm (control duration qualification for different individual appliances);
• Implement the DSC into CHP either as supply or as auxiliary device;
• Development of individual appliance models;
Thank you!
Any questions?