Hierarchical Control of Air-Conditioning Loads for Flexible Demand Response in the Short Term

Ju, Ping; Jiang, Tingyu; Li, Hongyu; Wang, Chong; Liu, Jingzi

doi:10.1109/access.2019.2960054

Cited by 15 publications

(10 citation statements)

References 26 publications

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“…An effective control mode is the means to ensure that the load body of the power system normally participates in the demand response of the power grid. The participation of air conditioning load aggregates in the power grid regulation and control process is a typical hierarchical control (Ju et al, 2019;Xia et al, 2019).…”

Section: Air Conditioning Load Aggregation Control Modementioning

confidence: 99%

A Review of Air Conditioning Load Aggregation in Distribution Networks

Wang

Chen

et al. 2022

Front. Energy Res.

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In the context of global energy transformation, it is particularly important to tap the potential of flexible load on the distribution network side to participate in grid operation. As an important flexible adjustable load in the distribution network, air conditioning loads have typical characteristics of thermal energy storage, rapid response, and flexible scheduling, which is an ideal load resource. Effective and reliable load aggregation technologies for air conditioning load participation are the basis for operation in a power grid. To better understand the current research status of air conditioning load aggregation technologies and make full use of the existing research results to carry out further research, this paper comprehensively reviews the various aggregation technologies being used in distribution networks, including the modeling strategy for air conditioning load aggregation, control strategy, control method, and application analysis. Moreover, future research directions are summarized as a guide to improving the technology of air conditioning load aggregation.

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Section: Air Conditioning Load Aggregation Control Modementioning

confidence: 99%

A Review of Air Conditioning Load Aggregation in Distribution Networks

Wang

Chen

et al. 2022

Front. Energy Res.

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“…The three tested engine oils have similar dielectric constants, ε = 2.2 at 100 • C and can easily be differentiated from the tested biohydraulic oil with ε = 2.7 at 100 • C, although ISO32 hydraulic oils typically have dielectric constants ranging between ε = 2 and ε = 2.4. Some differences between the fluids can also be observed from resistivity values [48,49].…”

Section: Incorrect Fluid Detectionmentioning

confidence: 99%

Research on Testing Method of Oil Characteristic Based on Quartz Tuning Fork Sensor

2021

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There is increasing demand for the on-board diagnosis of lubricating oils. In this research, we consider various sensor principles for on-board diagnosis of the thermal aging of engine oils. One of the parameters investigated is the viscosity of the lubricating oil, which can be efficiently measured using a microacoustic sensor. Compared with conventional viscometers, these sensors probe a different rheological domain, which needs to be considered in the interpretation of measurement results. This specific behavior is examined by systematically investigating engine oils, with and without additive packages, that were subjected to a defined artificial aging process. This paper presents design strategies for the algorithm developed and applied for direct on-board diagnosis of engine oil conditions with a fluid property sensor; this enables prediction of remaining oil life and optimization of oil change intervals, thereby minimizing the likelihood of dramatic engine failure and reducing maintenance costs. After a general description of the principles of sensor measurement, different engine oil contaminants, aging phenomena, and associated sensor detection and measurement capabilities are discussed.

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“…The control of the DPF's active regeneration temperature is critical. A regeneration temperature that is too low will lead to the accumulation of carbon smoke that cannot be completely regenerated, and a high regeneration temperature will lead to the risk of burning of the DPF carriers [9][10][11][12][13][14]. Millo et al [15] showed that high-sulfur fuel can poison the diesel oxidation catalyst (DOC) and DPF, while a high temperature can restore the catalyst desulfurization.…”

Section: Introductionmentioning

confidence: 99%

Study on Characteristics and Control Strategy of Diesel Particulate Filters Based on Engine Bench

Sun

Liu

et al. 2022

Processes

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The ignition temperature of a diesel oxidation catalyst (DOC) and the internal temperature-field distribution of the diesel particulate filter (DPF) during active regeneration are investigated during an engine bench test in this study. Based on the dropped to idle (DTI) test, a test method is developed to determine the safe regeneration temperature of the DPF. The results show that when the inlet temperature of the DOC is more than 240 °C, the DOC begins ignition and reaches the target temperature of 600 °C set for active regeneration of DPF; when the inlet exhaust temperature of the DOC is between 240 and 280 °C, a higher injection rate is required to reduce the secondary pollution of HC and thus make the DPF reach the set target temperature as soon as possible. The active regeneration process of the DPF is divided into three stages. During ignition, the temperature of the DPF inlet and outlet increases rapidly and successively. The internal and outlet temperatures of DPF during regeneration are approximately 50 °C higher than the inlet temperature. At the end of regeneration, the DPF inlet to outlet temperature drops rapidly. A feed-forward design and feedback algorithm are used to verify the change in the target regeneration temperature. The overshoot of the DPF control strategy was less than 3%, and the steady-state temperature control error was less than 20 °C. The results of this study provide a basis for the safe control of DPFs’ active regeneration temperatures.

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Hierarchical Control of Air-Conditioning Loads for Flexible Demand Response in the Short Term

Cited by 15 publications

References 26 publications

A Review of Air Conditioning Load Aggregation in Distribution Networks

A Review of Air Conditioning Load Aggregation in Distribution Networks

Research on Testing Method of Oil Characteristic Based on Quartz Tuning Fork Sensor

Study on Characteristics and Control Strategy of Diesel Particulate Filters Based on Engine Bench

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