Kinds Of Operation Modes Research Articles

Energy Management in the Microgrid and Its Optimal Planning for Supplying Wireless Charging Electric Vehicle

The ongoing research work on electric vehicles (EVs) as well as the growing concern around the world to ensure a pollution-free environment is sure to lead to a significant increase in the number of EVs in the near future. The electrification of automobiles is an inevitable trend of future development. However, the growth of EVs relies on several elements: autonomy, the charging practice and infrastructure, the price, and the high amount of energy needed for supplying EV. This tendency impacts several points in transportation such as the road infrastructure and electrical power network. The aim of this article is the integration of new energy power sources as a part of the microgrid (MG) to supply EV with dynamic wireless charging. The main goal is to establish an energy management strategy reducing the running cost. The purpose is suggested for two kinds of operation mode: relying only on the MG (island mode) or relying on the MG and the large grid (grid-connected). The optimization problem is solved on the basis of the particle swarm optimization (PSO) algorithm. We could note that the stability of the microgrid in the off-grid mode is better, when the load is close to the output power of the distributed power supply. Through the coordination and cooperation of the battery output and the other two distributed power generation units, the microgrid can achieve its autonomy and maximize the economy of the system operation. Thanks to our methodology, a better revenue and an enhanced flexible dispatching of the system were met in the grid-connected mode as well.

Proposal and preliminary experimental investigation on a novel efficient integrated system of combined refrigeration, heating, and hot water supply

Poly-generation systems with high integration can meet various needs of users. Therefore, design and efficient operation have always been the focus of attention. In this paper, a novel multi-functional system with R410A as the working fluid is proposed. Cooling, heat, and hot water can be provided under five kinds of operation modes. The most prominent advantages of the system lie in the high integration of multiple functions and high effectiveness in the combined cooling/hot water mode. The feasibility of system integration and mode switching is firstly analyzed and validated. The variation regulations of determining variables and performance indicator, including compressor inlet and outlet pressure, valve opening, and coefficient of performance, are revealed based on the self-built experiment rig. Research results exhibit that, an increase in the water tank temperature can promote the compressor outlet pressure. The average difference of inlet pressure between water tank temperatures of 50 °C and 40 °C is 30 kPa, while that of outlet pressure is 611 kPa. The larger the charge amount, the smaller the valve opening. Besides, under typical operating conditions, the total COP of the combined refrigeration/hot water mode can reach up to 8.25, and it is 51% more efficient than that of the hot water mode.

Research on Virtual Coupling Train Operations Based on Moving-Block and Vehicle-to-Vehicle Communication

This paper introduces the current research status of train operation mode especially the one based on the train moving-block system. Then it improves on the basis of the Vehicle-to-Ground(V2G) communication technology and the traditional fixed-block system constructs a virtual combination model based on the train moving-block system and Vehicle-to-Vehicle(V2V) communication technology. Through the construction of state flow-diagram of the entering and leaving the Virtual Coupling train-following model and calculation of the train capacity, discussion and analysis are carried out in different scenarios, including train tracking at the station, arriving at the station, sending out from the station, etc. Finally, the scene of two trains tracking through the station is simulated and compared with the traditional fixed-block operation mode in ideal circumstances. The results show that the new operation mode proposed in this paper can improve the railway capacity and train operation efficiency. In the future railway development, this kind of operation mode has certain efficiency.

Optimization of Multi-energy Transfer Considering Internal Interaction and External Collaboration in Micro-Energy Network Group

Micro-energy network realizes the complementary of distributed energy production according to the characteristics of users’ energy demand and local resource conditions. In order to realize the efficient operation of micro-energy network group, this paper proposed an optimal power transfer model based on Mutual Energy Supporting Pattern in micro-energy network group. The concept of micro-energy network is given and the basic structure of micro-energy network group based on the interconnection of external energy hubs is first established. Then, the micro-energy network model of internal energy hub and optimal power transfer model is established. The optimal power transfer model of micro-energy network group is subdivided into two kinds of operation modes, the internal cooperation mode and the synergy cooperation mode. The internal cooperation mode is to address the problem of energy shortage at the micro-energy network, while the synergy cooperation mode is to solve the problem through the coordination of multiple energy hubs in the micro-energy network group. Finally, the model is validated by a system including electricity, gas, heat/cooling load and external energy hub.

Numerical Study on Temperature Uniformity of Regenerative Heating Furnace

Using CFD simulation technology, the influence of three kinds of operation modes (air change on the same side mode, cross air change mode and staged air change mode) on the temperature uniformity of regenerative heating furnace was studied. The results show that: 1) in the same side air exchange mode, the high temperature area is easy to form in the middle of the furnace, which makes the local temperature of the billet surface high; 2) in the cross air exchange mode, the high temperature area appears in the middle of the furnace, the heat exchange in the middle of the billet is strong, and the heating speed is fast; 3) in the staged air exchange mode, the high temperature area moves to both ends, and the temperature at both ends of the billet is higher than that in the middle. Therefore, in order to keep the temperature of billet constant, the best operation mode of regenerative heating furnace is alternating operation of cross air change mode and staged air change mode.

Economic Analysis of 4MW Distributed Photovoltaic Power Generation Project Based on PVsyst Software Simulation

We use PVsyst software to simulate and calculate the first year electricity generation of 4 MW distributed photovoltaic power generation project. In order to analyze and select the suitable power plant operation mode, the total generating capacity of photovoltaic power station in 25 years has been estimated by using component attenuation of 25 years. This research reports on the findings shown by PVsyst software that evaluates the economy aspects brought by two kinds of operation modes which are full grid access mode and spontaneous use of residual power grid access mode. The research content has reference value for the construction of roof distributed photovoltaic power station in China.

Comparison of effects of two kinds of operation mode in treatment of complicated common bile duct stones

Comparison of effects of two kinds of operation mode in treatment of complicated common bile duct stones

Comparison of three kinds of operation mode for treatment of ovarian cyst

Objective To compare the effectiveness of the three operation mode in treatment of ovarian cyst. Methods According to the digital table,138 patients with ovarian cyst were divided into three groups, the group A (n=46 cases)were operated through open operation, group B(n=46 cases)were operated through transvaginal operation, group C(n=46 cases)were operated through laparoscopic operation.The three groups were observed the situation of operation(operation time, bleeding volume, the first exhaust time, hospitalizationtime), complications (infection, hemorrhage, perimenopausal changes), postoperative follow-up for 1years.The recurrence rate was observed. Results Group A of 46 patients were successfully completed surgery,B,C groups of 1 patients was conversed to laparotomy due to severe adhesion.B,C groups in the operation time, amount of bleeding during the operation, the time of hospitalization were significantly less than that of group A(t=4.306,5.172,3.012,3.926,3.776,2.168,P<0.05,P<0.01).B group was significantly less than those of A,C group in the first exhaust time(t=3.014, 2.446,all P<0.05).In the operation time of group B was obviously less than that of group C(t=2.748,P<0.05). A,B,C three groups of postoperative complication rates were 39.1%,11.1%,15.6%respectively;the incidence of complications of B,C groups was lower than that in A group(χ2=9.82,8.64,all P<0.01). After 1years follow-up,the recurrence rate in group B was significantly higher than that of A and C groups(χ2=6.72,6.72,all P<0.01). Conclusion Treatment of ovarian cyst vaginal surgery and laparoscopic surgery wound is small, but the person that weigh should be performed open adhesion treatment, individualized treatment. Key words: Ovarian cyst; Obsterics and gynecology operation

Comparison of three kinds of operation for glaucoma and cataract clinical curative effect

Objective To compare three kinds of operation method in the treatment of glaucoma with cata-ract indications and clinical efficacy .Methods 90 patients with glaucoma combined with cataract were randomly divided into A,B,C three groups,patients in group A underwent phacoemulsification and IOL implantation therapy , patients in group B underwent phacoemulsification and IOL implantation combined with peripheral iridectomy treat -ment,patients in group C underwent phacoemulsification and IOL implantation and trabecular bite resection ,compared three groups of patients with clinical curative effect The .Results of three groups of patients before treatment and operation visual acuity compared to no significant difference （P>0.05）,the treatment after operation,all patients vis-ual acuity was improved ,no significant difference in visual contrast and three group of patients after operation （ P>0.05）.Three groups of patients before operation ,1 week after operation,6 months after the IOP had no statistically significant difference （ P>0.05）;the same group of patients before and after operation in different time points .The intraocular pressure had significant differences （P〈0.05）.Three groups of patients with postoperative iris root is rela-tively flat,wide angle increases,and the remaining peripheral iris mucosal area has been narrowed ,visible range be-come larger;no serious complication occurred .Conclusion Glaucoma patients with cataract treated with three kinds of operation mode ,can significantly improve the visual acuity of patients ,so it has high value in clinical application . Key words: Glaucoma; Cataract; Operation mode

A New Fuse Architecture and a New Post-Share Redundancy Scheme for Yield Enhancement in 3-D-Stacked Memories

3-D-stacked memory using through-silicon-vias (TSVs) has emerged as a good alternative for overcoming the limitation of 2-D memory technology. Among many issues with 3-D-stacked memory, yield is one of the major challenges for mass production. This paper proposes a new fuse architecture and redundancy scheme to improve the yield of 3-D-stacked memories. The new fuse architecture is developed based on the fact that the unused redundancies in prebond repair cause the inefficiency. Therefore, the new fuse architecture provides a way to share redundancies in prebond and postbond repairs. There are two kinds of operation modes. One is an enable mode for collecting the used redundancy information. The other is a mask mode for obtaining faulty redundancy information using a short test algorithm. Using the new fuse architecture, a new redundancy scheme called the post-share scheme is developed to achieve optimal yield. The post-share scheme allocates the fixed number of spare rows and columns for each repair just like other schemes. However, only allocated redundancies are used in prebond repair, while both the redundancies allocated for postbond repair and unused redundancies in prebond repair can be used for postbond repair. Experimental results show that the post-share redundancy scheme significantly increases the final yield of 3-D-stacked memories and the increase of area overhead is small.

Research on Comparative Analysis of Regional Logistics Information Platform Operation Mode Based on Cloud Computing

In order to realize integration of the social logistics resource and provide customized logistics services to the customers, this paper presents a regional logistics platform architecture based on cloud computing through systems analysis. Subsequently, a suggestion about adopting the mode of cooperative operation leading by the enterprise is provided combining the development situation of cloud computing and logistics information public platform in china on the basis of comparative analysis of three kind of operation mode.

Radiation Characteristics of Guided and Leaky modes for a Plasma Column Antenna

A substantial problem for the radiation of a plasma column antenna is investigated. By means of the study on electromagnetic (EM) waves propagating along the plasma column and acting with plasma, it is found that a plasma column can radiate the EM energy when it works as two kinds of operation modes. The first one is a guided mode which leads to a surface current radiation, and its operation condition is obtained by determining the relation of plasma frequency and signal frequency. The second one is a leaky mode which causes a leaky wave radiation, and its operation condition is presented by analyzing normalized complex propagation constant. With further dealing with the leaky mode, its far field is got by applying the Schelkunoff’s equivalence principle on the surface of the plasma column. Radiation patterns of two kinds of modes are presented in their respective operation frequency bands, and reveal the radiation properties of the plasma antenna. The presented results are very helpful for further investigation in the design and application of plasma column antenna DOI : http://dx.doi.org/10.11591/telkomnika.v12i1.3500

Optimal Design of Passive Filter Groups Based on Three Kinds of Operation Modes

Parameters of passive filter (PF) group are usually designed according to single operating mode, in general the maximum operation mode. When power system is being operated in other operation mode, it is impossible to meet the requirement of power system in reactive power compensation and harmonic elimination simultaneously when whichever filter group is out of service. For this reason, based on three kinds of typical operation mode, namely the maximum, average and minimum mode, the optimization design of PF group is performed and reasonable parameters are determined to achieve the optimal matching between harmonic elimination and reactive power compensation by the lowest investment cost. The feasibility of the proposed method is verified by simulation results.

Research on Canal System Automation Control Based on Adaptive Parameters Fuzzy

Automated control can improve the canal system to scheduler run levels, improve water efficiency and reduce operating costs schedule. In order to improve the accuracy and reliability of the control, the paper combines fuzzy control theory and PID control technology, Can give full play to the intelligence technology characteristics of the fuzzy control and can effectively improve the limitations of the traditional PID control, realize real-time self-tuning of PID control parameters, This ensures stable operation of drainage systems, can greatly improve the overall control performance of the canal, canal system automatic control development provides new ideas and approaches. Finally respectively for three kinds of operation mode of the single systems simulation, analysis of the superiority of the fuzzy theory combined with PID control.

Analysis of the effect of the two kinds of operation mode the treatment of high anal fistula

Objective To investigate the treatment of moed high anal fistula operation.Methods 110 cases of high anal fistula patients were randomly divided into the incision line selective suture group(treatment group 55 cases) and incision group(55 cases in the control group),on two groups of treatment time,the cure rate,the anal function were analyzed.Results The cure rate of the treatment group and control group were 98 ％,86％,respectively,the cure rates of two groups have no significant difference (x2 =1.557,P ＞ 0.05),the healing time and postoperative anal function evaluation in treatment group was superior than those in control group (t =3.440,4.671,all P ＜ 0.01).Conclusion Incisionunder selective suture in the treatment of high anal fistula operation is a better way. Key words: Rectal fistula; Surgical procedures,minor

A Simulation Training System of Multi-Effect Seawater Desalination

A simulation training system of multi-effect seawater desalination is helpful for research and training. A method of organizing the virtual space and models into a hierarchy tree was proposed, according to their topology relationship. The simulation model of seawater desalination plant was given, and the PID control system was designed. According to different kinds of operation modes, the meaning of gestures in different scene context was analyzed. A context-sensitive fast algorithm was proposed to accelerate the collision detection. A simulation training system of multi-effect seawater desalination is successfully realized and applied in worker’s training.

Design of Robot Master-Slave Control System Based on LabVIEW

At present, most of the robots’ intelligent level is not as high as needed and they can’t accomplish some special tasks successfully under complicated circumstances. A kind of robot master-slave control system based on LabVIEW is designed, which allows operators control robots working in dangerous environment such as high radiation, ultrahigh temperature through outside input device. The device should connect with the master computer. This kind of operation mode can not only make full use of human intelligence, but also exploit the robots’ ability of being able to work in the abominable environments, making human and the robot fully complement each other's advantages. At the same time, the robot master-slave control system based on LabVIEW is easy to develop and maintain for its good portability and scalability.

Reliability Evaluation in Modern Urban Distribution Considering Islands Impacts

A growing number of distributed generators have been connected to urban distribution networks in recent years, which brings great challenges to the traditional reliability evaluation of the distribution grids. Island is a new kind of operation mode of the city grid. In consideration of the importance factor of system load, establish the model of island taking the maximum equivalent workload capacity as objective function and heuristic search technology is proposed to solve the problem. According to the island mode of operation, assess the reliability of the network with islands based on equivalent resistance and minimal path, which have certain instructive significance to the improvement of reliability of the modern urban distribution nets.

Research on Green Shipbuilding and Concurrent Green Ship Design

Green shipbuilding is the embodiment of sustainable development strategy in the ship manufacturing industry. The combination of concurrent engineering and green design forms concurrent green ship design. The connotation of green shipbuilding is discussed firstly. Then a kind of operation mode of concurrent green ship design is presented, and the main contents of the mode are analyzed finally.

A Study on the Development of Playback Control Software for Mark5B VSI System

We developed the playback control software for a high-speed playback system which is a component of the Korea-Japan Joint VLBI Correlator (KJJVC). The Mark5B system, which is a recorder and playback system used in the Korean VLBI Network (KVN), has two kinds of operation mode. That is to say, the station unit (SU) mode, which is for the present Mark4 system, and the VSI mode, which is for the new VLBI standard interface (VSI) system. The software for SU is already developed and widely used in the Mark4 type VLBI system, but the software for VSI has only been developed for recording. The new VLBI system is designed with a VSI interface for compatibility between different systems. Therefore, the playback control software development of the VSI mode is needed for KVN. In this work, we developed the playback control software of the Mark5B VSI mode. The developed playback control software consists of an application part for data playing back, a data input/output part for the VSI board, a module for the StreamStor RAID board, and a user interface part, including an observation time control part. To verify the performance of developed playback control software, the playback and correlation experiments were performed using the real observation data in Mark5B system and KJJVC. To check the observation time control, the data playback experiment was performed between the Mark5B and Raw VLBI Data Buffer (RVDB) systems. Through the experimental results, we confirmed the performance of developed playback control software in the Mark5B VSI mode.