Fundamental study on controllability of heat pump power consumption for fluctuated power compensation

Hagiwara, Hiroki; Kawachi, Shunsuke; Baba, Jumpei; Furukawa, K.; Shimoda, Eisuke; Numata, Shigeo

doi:10.1109/iccep.2011.6036375

Cited by 4 publications

(3 citation statements)

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“…In a fast time scale, and depending on the HVAC system, the HP consumption can be controlled by modifying either the water temperature setpoint at condenser's outlet or the refrigerant's flow rate via valves. We rely on the second approach that was experimentally shown to be able to track fast reference signals, e.g., SFC signals, in [36]. The desired HP consumption u b,j,Lv3 t can be tracked using a feedback PI controller.…”

Section: Lv3: Frequency Signal Filtering and Trackingmentioning

confidence: 99%

“…The tracking quality of w t depends on HP's mechanical delays and dead-times, ramping limits, and minimum down-times and/or run-times. If such dynamics are significant, tests similar to the ones in [36] must be performed to identify upper limits on the frequency content of w t that result in good tracking by the HP. In this case, the building aggregation could form a coalition with faster resources, e.g., an aggregation of residential electric water heaters, exclude very high frequency components of the SFC signal using an appropriate band-pass filter, and send them to the faster resources.…”

Section: Lv3: Frequency Signal Filtering and Trackingmentioning

confidence: 99%

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Robust Energy-Constrained Frequency Reserves From Aggregations of Commercial Buildings

Vrettos

Oldewurtel

Andersson

2016

IEEE Trans. Power Syst.

111

100

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It has been shown that the heating, ventilation, and air conditioning (HVAC) systems of commercial buildings can offer ancillary services to power systems without loss of comfort. In this paper, we propose a new control framework for reliable scheduling and provision of frequency reserves by aggregations of commercial buildings. The framework incorporates energy-constrained frequency signals, which are adopted by several transmission system operators for loads and storage devices. We use a hierarchical approach with three levels: (i) reserve capacities are allocated among buildings (e.g., on a daily basis) using techniques from robust optimization, (ii) a robust model predictive controller optimizes the HVAC system consumption typically every 30 minutes, and (iii) a feedback controller adjusts the consumption to provide reserves in real time. We demonstrate how the framework can be used to estimate the reserve capacities in simulations with typical Swiss office buildings and different reserve product characteristics. Our results show that an aggregation of approximately 100 buildings suffices to meet the 5 MW minimum bid size of the Swiss reserve market.

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Section: Lv3: Frequency Signal Filtering and Trackingmentioning

confidence: 99%

Section: Lv3: Frequency Signal Filtering and Trackingmentioning

confidence: 99%

Robust Energy-Constrained Frequency Reserves From Aggregations of Commercial Buildings

Vrettos

Oldewurtel

Andersson

2016

IEEE Trans. Power Syst.

111

100

View full text Add to dashboard Cite

show abstract

“…Research is often motivated by the desire to mitigate the stochastic nature of renewable generation [11]- [13]. Because of the inertia inherent to a sufficiently large thermal mass, heating applications in general, and heat pump systems in particular, have been looked to as a mechanism for providing short term control of power consumption [14]- [16].…”

Section: Related Researchmentioning

confidence: 99%

A Dual-Heat-Pump Residential Heating System for Shaping Electric Utility Load

Barrett

Eustis

Bass

2018

IEEE Power Energy Technol. Syst. J.

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We present a residential heating system designed specifically to provide electric utilities with a means for achieving intra-hour load shifting. The system couples two heat pumps with a large water tank, which serves as a thermal storage unit. One heat pump uses the water tank as a source and serves residential heating load. The other uses the outdoor air as a source and heats the water tank during favorable weather conditions, thereby improving the efficiency of the first. By aggregating large numbers of such systems distributed throughout its balancing area, a utility may use this resource as a means for achieving load shaping, the intra-hour shifting of generation resources from periods of peak demand to periods of low demand. This paper focuses on the potential for using such an aggregated resource as a technological solution for realizing winter peak demand reduction and overall lower energy consumption, thereby displacing the need for capital investment in peak generation plants. The results of this paper are promising, demonstrating potential savings for both the utility and residential customers.

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Integrating large shares of heterogeneous thermal loads in power system frequency control

Vrettos

Ziras

Andersson

2015

2015 IEEE Eindhoven PowerTech

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Fundamental study on controllability of heat pump power consumption for fluctuated power compensation

Cited by 4 publications

References 1 publication

Robust Energy-Constrained Frequency Reserves From Aggregations of Commercial Buildings

Robust Energy-Constrained Frequency Reserves From Aggregations of Commercial Buildings

A Dual-Heat-Pump Residential Heating System for Shaping Electric Utility Load

Integrating large shares of heterogeneous thermal loads in power system frequency control

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