A Hybrid Building Power Distribution System in Consideration of Supply and Demand-Side: A Short Overview and a Case Study

Zhang, Yongming; Yan, Zhe; Li, Li; Yao, Jiawei

doi:10.3390/en11113082

Cited by 7 publications

(9 citation statements)

References 63 publications

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“…Previous research [47] presented the hybrid building power distribution system based on DC micro-grid and verified the feasibility of elevator DC micro-gird. The existing test experiment is presented in Section 4.2. and the further practical operation is presented in Section 4.3.…”

Section: Case Studymentioning

confidence: 85%

“…This paper proposes an energy conservation approach of an elevator group by a DC micro-grid, which has better economic performance. Based on the existing research [45][46][47], an elevator in the status of electrical motoring is regarded as a load, and an elevator in the status of power generation is regarded as a DC source. Through a DC micro-grid [48][49][50][51][52][53], renewable electricity can be shifted from the power generation elevator to the motoring elevator, achieving higher energy efficiency of the elevator group.…”

Section: A New Energy-efficient Methods Proposed For Elevator Groupmentioning

confidence: 99%

“…In order to simplify the experiment, one of four VVVF elevators was studied. Based on the existing research [47], it is assumed that there are three typical states classified by the weight of load: (1) A single person (75 kg) without any extra weight is simulated as an empty load; (2) one person (75 kg) with 500 kg weight stands for a half load, (3) one person (75 kg) with 1000 kg weight presents a full load. It can be seen that under all of the three states, one person was loaded as the elevator driver during the running.…”

Section: The Analysis Of the Test Experiments Datamentioning

confidence: 99%

“…The input and output power of the supercapacitor at the upgoing state[47].Energies 2018, 11, x 11 of 17…”

mentioning

confidence: 99%

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A Novel Reconstruction Approach to Elevator Energy Conservation Based on a DC Micro-Grid in High-Rise Buildings

et al. 2018

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Elevators were reported to cause an important part of building energy consumption. In general, each elevator has two operation states: The load state and power regeneration state. During operation, it has the potential to save energy by using regeneration power efficiently. In existing research, a set of energy storage devices are installed for every elevator, which is highly costly. In this paper, an energy conservation approach for elevators based on a direct current (DC) micro-grid is proposed, which has better economy. Then, an innovative energy-efficient device for the elevator group is designed based on a supercapacitor with similar characteristics and lifetimes. In a high-rise building case study, the experimental test and field data collection show that the innovative approach could result in a high energy efficiency within 15.87–23.1% and 24.1–54.5%, respectively. It is expected that the proposed method and designed device could be employed practically, saving energy consumption for elevator reconstruction.

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Section: Case Studymentioning

confidence: 85%

Section: A New Energy-efficient Methods Proposed For Elevator Groupmentioning

confidence: 99%

Section: The Analysis Of the Test Experiments Datamentioning

confidence: 99%

“…The input and output power of the supercapacitor at the upgoing state[47].Energies 2018, 11, x 11 of 17…”

mentioning

confidence: 99%

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A Novel Reconstruction Approach to Elevator Energy Conservation Based on a DC Micro-Grid in High-Rise Buildings

et al. 2018

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“…The hybrid poles group are integrated by use of DC micro-grid [28,29], as shown in Figure 4. In this micro-grid system, smart hybrid poles are connected by DC bus.…”

Section: The Architecture Of Smart Hybrid Poles Group and Mangement Smentioning

confidence: 99%

A Group Approach of Smart Hybrid Poles with Renewable Energy, Street Lighting and EV Charging Based on DC Micro-Grid

et al. 2018

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Energy crisis and environmental pollution have become global problems, and the increasing use of energy has caused climate change. Electric vehicle (EV) is regarded as the future of the automotive industry, because of the lesser impact on the environment than traditional vehicles. In recent years, electric vehicles have developed rapidly. However, the development of charging points and service cannot adapt to the development trend of EV. In urban areas, the distribution characteristics of street lighting and charging points are similar. Therefore, the street lighting pole with EV charging is proposed. However, due to the capacity limit of public grid, the single hybrid pole is only suitable for slow charging. This paper proposes hybrid poles group based on renewable energy, street lighting, and EV charging, which can realize fast charging and slow charging based on DC micro-grid with help of energy storage device. For studying the suitable number in a group of smart hybrid pole, the efficiency model of smart hybrid poles group is proposed. The efficiency model indicates that the group approach has better performance than the single pole, which provides a theoretical basis for practical construction.Energies 2018, 11, 3445 2 of 17 of car to pole is about 8:1, so it is less than the theoretical ratio of 1:1~1.2. Currently, it needs to build more charging poles [6]. In 2020, 435 thousand charging points will be built in Beijing to satisfy the requirement for 600 thousand EV. Moreover, the lack of an adequate publicly accessible charging infrastructure is considered to be a major obstacle to the growth of European market [15].Charging facilities generally include private points and charging station. In recent years, it has been suggested that EV charging points can be integrated with the existing street lighting network, because the distribution characteristic of street lighting in the urban area is similar with the distribution characteristic of charging points. Therefore, the street lighting pole with EV charging system is presented [16]. Smith et al. introduced the concept of a DC Lighting and Charging network to increase the power transfer capability of the lighting cables in order to enable charging of EVs at a higher energy efficiency than AC [16]. In addition, BMW and Ubitricity company, respectively, have deployed a street-light charging solution [17,18], which contribute to a greener city. However, this single street-light charging pole is only suitable for EV slow charging because the power of public grid for a single pole is not enough for EV fast charging.For handling the incompatibility between fast charging and the power limit, the hybrid poles group method with renewable energy, street lighting, and EV charging systems are proposed based on DC micro-grid in this paper. The energy storage devices in hybrid poles group can collaboratively work with the help of DC micro-gird and provide enough electric power for fast charging.The remainder of the paper is organized as follows: Section 2 presents the archi...

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Compatibility of household appliances with DC microgrid for PV systems

Sabry

Shallal

Hameed

et al. 2020

Heliyon

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DC distribution of PV systems has spread back especially in the residential sector as a variety of electronic appliances became locally available in the market. The compatibility of household appliances with the best voltage-level in a DC environment is the field that still in the research phase and has not yet made a practically extensive appearance. This paper mainly discusses this issue by providing a review of the concerning research efforts, identifying the gaps in the existing knowledge. The work explains the electrical diagrams of the recently produced appliances, classifying them to get an understanding of how each one consumes energy. It includes exploiting the recent dependence of the commercial appliances on power electronics to improve the efficiency of the existing DC distribution systems by extrapolating new architectures. The proposed topology has a DC distribution environment with two levels of voltage for all appliances. Appliances performances have been evaluated by calculating the energy transfer efficiency. The outcomes of this work can help in designing more efficient DC power distribution networks with minimal energy converters and establishing standardizations for DC microgrids.

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A Hybrid Building Power Distribution System in Consideration of Supply and Demand-Side: A Short Overview and a Case Study

Cited by 7 publications

References 63 publications

A Novel Reconstruction Approach to Elevator Energy Conservation Based on a DC Micro-Grid in High-Rise Buildings

A Novel Reconstruction Approach to Elevator Energy Conservation Based on a DC Micro-Grid in High-Rise Buildings

A Group Approach of Smart Hybrid Poles with Renewable Energy, Street Lighting and EV Charging Based on DC Micro-Grid

Compatibility of household appliances with DC microgrid for PV systems

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