# US 2018/0322591 A1 · Control device for optimizing local energy network

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- Number: US 2018/0322591 A1
- Document ID: US20180322591A1
- Status: Published application
- Kind: A1
- Application number: 15/522,101
- Filed: 2014-11-05
- Published: 2018-11-08
- Earliest claimed: 2014-11-05
- Assignees: Yanmar Co., Ltd.; Enel Produzione S.p.A.
- Applicants: Yanmar Co., Ltd.; Enel Produzione S.P.A.
- Inventors: Allessandro BELLISSIMA; Sandro MAGNANI; Mirko ANDREINI; Giovanni FERRARA; Fabio ESPOSITO; Lorenzo FERRARI; Massimo PENTOLINI; Marcello DE CHIRICO; Giacomo PETRETTO; Matteo CANTU; Sandra SCALARI; Gianluca GIGLIUCCI
- Web page: https://patentgrep.com/patent/US20180322591A1

## CPC

- G06Q 50/06: Energy or water supply
- G06N 3/126: Evolutionary algorithms, e.g. genetic algorithms or genetic programming
- H02J 3/14: by switching loads on to, or off from, the networks, e.g. progressively balanced loading
- H02J 3/003: {Load forecast, e.g. methods or systems for forecasting future load demand}
- H02J 2105/42: Home appliances
- Y02B 70/30: Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B 70/3225: Demand response systems, e.g. load shedding, peak shaving
- Y02P 80/10: Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y04S 20/222: Demand response systems, e.g. load shedding, peak shaving
- Y04S 20/242: Home appliances
- G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06N: COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS

## Abstract

Disclosed is a control device capable of reducing CO2 emission and primary energy consumption, as well as energy supply cost, to lowest possible levels in optimal energy management. In repeatedly generating two or more energy balance candidates for each unit time for the outputs of the electric power grid and thermal accumulation unit based on combinations of varied values of the output ratios of a CHP, an RES, a thermal energy supply system, and an electrical storage unit and the consumption ratios of electric and thermal loads until the convergence of the evaluation values of the two or more candidates reaches a convergence criterion.

## Claims

### Claim at position 1

-7. (canceled)

### Claim 1

A control device for an electric and thermal energy network connecting a combined heat and power system (CHP), a renewable energy source (RES), an electric storage unit, a thermal accumulation unit, an electric power grid, a thermal energy supply system, an electric load, and a thermal load, said control device comprising:
input means receiving a forecast energy demand, a unit energy price, and a forecast weather condition for a geographical region covered by the electric and thermal energy network;
computing means repeatedly generating two or more energy balance candidates for each unit time for an output of the electric power grid and an output of the thermal accumulation unit based on combinations of varied values of an output ratio of the CHP, an output ratio of the RES, an output ratio of the thermal energy supply system, an output ratio of the electric storage unit, a consumption ratio of the electric load, and a consumption ratio of the thermal load, until convergence of evaluation values of the two or more candidates reaches a predetermined convergence criterion; and
output means transmitting, to the CHP, the RES, the thermal energy supply system, the electric storage unit, the electric load, and the thermal load, respective operational instructions for each unit time to instruct the CHP, the RES, the thermal energy supply system, the electric storage unit, the electric load, and the thermal load,
wherein the computing means implements:
a first calculation process in which the computing means calculates an output of the CHP from a rated output of the CHP and the output ratio of the CHP, calculates an output of the RES from a maximum output of the RES and the output ratio of the RES, the maximum output being based on a weather condition, calculates an output of the thermal energy supply system from a rated output of the thermal energy supply system and the output ratio of the thermal energy supply system, calculates an output of the electric storage unit from a maximum output of the electric storage unit and the output ratio of the electric storage unit, the maximum output being based on the state of charge, calculates an energy consumption of the electric load from a rated power consumption of the electric load and the consumption ratio of the electric load, and calculates an energy consumption of the thermal load from a rated power consumption of the thermal load and the consumption ratio of the thermal load;
a second calculation process in which the computing means calculates a d fference between a sum of the output of the CHP, the output of the RES, the output of the thermal energy supply system, and the output of the electric storage unit, and a sum of an uninterruptible energy consumption for energy demand, the energy consumption of the electric load, and the energy consumption of the thermal load as the output of the electric power grid and the output of the thermal accumulation unit;
an evaluation process in which the computing means plugs in energy supply costs, CO2 emissions, and primary energy consumptions into an evaluation criterion to evaluate the two or more energy balance candidates for each unit time, the energy supply costs being based on the unit energy price; and
a selection process in which the computing means selects, from the two or more energy balance candidates for each unit time, a most positive evaluation candidate that is most positively evaluated when the convergence of the evaluation values of the two or more candidates has reached the convergence criterion, wherein the output means transmits respective operational instructions for each unit time based on the most positive evaluation candidate to the CHP, the RES, the thermal energy supply system, the electric storage unit, the electric load, and the thermal load.

### Claim 2 (depends on 1)

The control device as set forth in claim 1, wherein the computing means codes the output ratio of the CHP, the output ratio of the RES, the output ratio of the thermal energy supply system, the output ratio of the electric storage unit, the consumption ratio of the electric load, and the consumption ratio of the thermal load into a chromosome containing a predetermined number of genes, codes the two or more candidates into individuals, and repeatedly generates two or more individuals based on a genetic algorithm.

### Claim 3 (depends on 2)

The control device as set forth in claim 2, wherein the electric and thermal loads are classified into four categories L1 to L4:
L1: non-adjustable loads that consume the uninterruptible energy consumption for energy demand;
L2: interruptible and adjustable loads;
L3: manageable loads that are not allowed to discontinue their operation until a total operation time is reached once they start to operate; and
L4: manageable loads that are, after starting to operate, allowed to discontinue their operation if a total operation time is reached within a predetermined period of time.

### Claim 4 (depends on 3)

The control device as set forth in claim 3, wherein:
the input means further receives an electric power exchange profile of the electric power grid as an energy demand; and
the computing means uses matching between the output of the electric power grid and the electric power exchange profile as an additional evaluation criterion.