Stability Analysis of DC Distribution System

stability Analysis of DC Distri stillion musical arrangementStability Analysis of DC Distribution System with Constant Multiple Power Loads ethics Declaration Checklist (to be fatten outd by student)Does this project involve the use ofYES/NOHuman per centumicipants,NOPreviously collected confidential data,NOAnimals for scientific purposes?NOIf YES to any of the above, then the proposal trinity not be approved and you go out not be allowed to proceed with this project.By submitting this report through and through the unit website for assessment, you certify that the information provided above is true and correct.AbstractIn recent times dc dissemination ashes is become a very complex which consist various types of multiple might convertors. But organization is suffered from stableness think problem which arise due to negative incremental immunity of constant causation tons. There are several methods for stableness depth psychology of dc scattering agreement such(p renominal) as Middelbrook criterion, phase and gain margin criterion, energy source consortium criterion and the Passivity- base constancy criterion (PBSC). Furthermore, one another technique which name is Positive Feed-Forward give which is used with PBSC to better the stability and to solve the scheme interaction problem. The main aim of the project is to run whole body into simulation mode in MATLAB and try to make the carcass stable.IntroductionNow day dc distribution outlines are mostly based on the power electronics Which used power converter and semiconductor devices. As a result stability and ever-changing performance developed due to converter inter connectedness system. As we mentioned above there are most of criterion give notice be used exclusively for single bus system. However, the power electronics based system consist multiple converter and multibus system so for this complex scenario the most reliable and accurate technique is the Passive Based Stability Critrion (PBSC). In this technique, stability of the any system may be derived by evaluating the system bus electric resistance. (Siegers, Arrua and Santi, 2017)Furthermore, in PBSC technique the system may be stable if the bus impedance of the system is analysed as a passive indeed this system also need to couple with positive feed- ahead technique which is used to design stabilizing controllers that rive the system bus passivity by damping impedances. The main concept of dynamic performance is based on impedance region of the system so suitable damping impedance faeces be developed or calculated in the system utilize the PFF control.Fig1.0 multi-bus system with power convertersMotivationIn recent time, to utilisation with dc distribution system becomes very easier because of developed semiconductor technology and power electronics converters. In power system net give generally stability of any system is very import if it is dc or ac distribution. Power quality is generall y related to potentiality quality of the system. At this stage, the main angle of dip is to change ac distribution system with high direct dc distribution system. There are several technique are available for stability depth psychology of dc distribution system but the impedance based stability criterion such as PBSC is widely used. When any system is connected with the constant power load then it may be suffer from instability because it causes to increase the current. As a result it will definitely decrease the voltage. (Hodge Flower, 2009).In addition, PBSC is recently developed stability summary technique which is exhibit better stability margins and namees certain performance. Furthermore, this technique is power electronics based so it may consist of multiple power converters. There is one basic architecture place is accustomed in fig 1.0. This technique is now applied to several net full treatment such as automotive power system, telecom system, electric- ship and el ectric- aircraft, as well as electric and hybrid- electric vehicles. (Siegers, 2017).Moreover, world-classly PBSC technique could be gift unaccompanied to single bus system which consist of source and load converter. But after dynamic closed loop response of the converters is establish using standard resistively intermediate converter which is used to do the analysis of single bus system. In general, the multi-bus power converter system has n arrives of buses and also has large number of switching converters, sources and loads. Multi-bus system is evaluated to an equivalent network (n-Port) to each bus. Mostly, passive based stability criterion is developed in frequency subject.ObjectivesThe main objective of this project is how DC distribution system should be become stable during constant power load using PBSC technique. PBSC is one of the different techniques which can be used for both single and multiple bus system so it will be helpful to understand the switching system o f converter.Need to analysis of criteria for the stability of dc distribution system.To earn the circuit of dc distribution using switching converter for different block system such as open loop, feed forward input control.Create the matrix diagram and its calculation of modify function.To run whole DC distribution model in simulation mode in MATLAB.To liken and analysis of the material calculation and simulation result for stability.SignificanceThe main significance of this method is that system may be stable if the network is passive. PSBC is mostly used for multi-bus system so it has n number of load converter and m number of source converter. Therefore, mainly two criteria for system stable which related to total equivalent impedance.Z(bus) has no poles on right half plane(RHP)ReZ(bus(jw) =0 or Z(jw) has a contour of Nyquist which is lies totally in the RHP.The main goal of the technique is to make system stable. So, positive feed- forward control (PFF) is using damping imped ance in couple with the existing impedance. The main reason of using damping impedance is to stabilize the DC bus voltage by changing the bus impedance in the frequency domain. Furthermore, there are mainly three types of correspond damping cases such as Capacitor parallel damping, R-C parallel damping and L-R-C parallel damping.Proposed ApproachThe project work can be divided into a number of projections that lead to complete work sequentially and successfully for achieving the main objective. There are mainly four task that need to be done such as research or understand the DC system, dogma of PBSC technique and how it is different from the other stability technique, matrix analysis and mathematical approach and finally to establish dc distribution model in simulation mode in MATLAB.In the first task, it is essential to understand the basic principle of dc system such as how dc system works and why dc system becomes unstable in certain condition. Furthermore, PBSC is the main part of this project so it is necessary to understand other stable system first then how PBSC can be different technique than other for example these only one system which can be used for multi-bus system. In addition, the main role is that it works with switching converter because dc system can work only in resistive part but due to switching approach in time domain analysis it can work with inductive and capacitive part.The third part is to establish mathematical model or calculation of any system by using matrix formation. It will give the actual value of impedance for stability of system because whole method is depends on impedance of the system. Finally, the last part of this project is very important. It is necessary to understand the MATLAB software and then apply simulation mode for DC grid system.TimelineOne grant chart is given in the appendix which shows the whole timeline of the project. In the first semester, project is divided into 13 weeks excluding holidays and exams . The description and time is also given in the grant chart. Furthermore, for semester 2 dates and description is not fixed but given approximate nearly. During the project, it may come some phantasm and difficulties then some changes will occur. Each task is given sequentially and it may help to complete the whole task in given period.Risk AssessmentThere is another attachment is given in appendix which shows the risk of the project. In general, the risk of the project is very low because mostly work in simulation mode not in the real world. There are several factors which can be affecting on the project such as supervisor, health, personal, software, equipment and computer. All factors are defined by code which is given below.SUP- SupervisorPer- PersonalHLTH- healthEQU- equipmentCMP- computerSFT- softwareAs mentioned above the boilersuit risk of this project is low. Some risk factors are near to zero such as supervisor, personal. The health risk also low but sometimes it is dang erous for eyes due to sitting in front of computer but it can be overcome wearing the glasses. Instrument risk sometimes high because of awareness of using but it can solve by taking care properly. computing device data risk is very low and it can be overcome by back up data in USB. Software risk can be moderate.Progress to DateThe current level of the project work is at initial stage. Firstly I try to understand the how DC system is different than AC system. Furthermore, Try to find research paper related to the project work. Research is started on PBSC (Passive based stability criterion) technique and its main principal of this technique. Try to understand that why PBSC is used for stability analysis rather than another method. I am trying to understand matrix equation of stability criterion. In addition, in the last session I understand how DC system works with electrical capacity and inductor. Also I get broad knowledge about using capacitor in parallel with any circuit. In fu rther session we will learn whole system and after we will learn the MATLAB software for future simulation.ConclusionAfter completing all task of this report, the stability of dc distribution system is quit complex but it is very useful for high voltage distribution system. It is very reliable and easier than AC system. The PBSC technique is also better than other technique because multi- bus system stability developed. Also PBSC is also analysis the passivity for individual bus system within MVDC system present. This technique is also validated or applies for both simulation and experimental model of four converter system. Also PBSC can reduce design and sensitivity to component. There are some benefits of this system such as reduce power dissipation, large currents, weight and cost. annexs1 Barkley, A., Santi, E. (2009). Improved online identification of a DC-DC converter and its control loop gain using cross-correlation methods. IEEE legal proceeding on power electronics, 24(8) , 2021-2031.2 Barkley, A., Dougal, R., Santi, E. (2011, March). Adaptive control of power converters using Digital Network Analyzer Techniques. In Applied Power Electronics Conference and translation (APEC), 2011 Twenty-Sixth yearbook IEEE (pp. 1824-1832). IEEE.3 Bottrell, N., Prodanovic, M., Green, T. C. (2013). Dynamic stability of a microgrid with an participating load. IEEE legal proceeding on Power Electronics, 28(11), 5107-5119.4 Cho, H. Y., Santi, E. (2008, November). Modeling and stability analysis in multi-converter systems including positive feedforward control. In Industrial Electronics, 2008. IECON 2008. 34th Annual Conference of IEEE (pp. 839-844). IEEE.5 Cvetkovic, I., Boroyevich, D., Mattavelli, P., Lee, F. C., Dong, D. (2013). Unterminated small-signal behavioral model of DC-DC converters. IEEE proceedings on Power Electronics, 28(4), 1870-1879.6 Lin, R. L., Yeh, P. Y., Liu, C. H. (2012). Positive feed-forward control scheme for distributed power conversion system with multiple voltage sources. IEEE Transactions on Power Electronics, 27(7), 3186-3194.7 Lin, R. L., Liu, W. S., Chen, J. F., Chen, M. H., Liu, C. H. (2013). Positive feedforward control for multimodule output-series power-conversion systems with individual nonideal sources. IEEE Transactions on Industrial Electronics, 60(4), 1323-1334.8 Riccobono, A. (2013). stabilize Controller Design for a DC Power Distribution System using a Passivity-Based Stability mensuration.9 Riccobono, A., Santi, E. (2013). Positive feedforward control of three-phase voltage source inverter for DC input bus stabilization with experimental validation. IEEE Transactions on Industry Applications, 49(1), 168-177.10 Riccobono, A., Santi, E. (2012, February). A novel passivity-based stability criterion (PBSC) for switching converter DC distribution systems. In Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE (pp. 2560-2567). IEEE.11 Rivetta, C., Williamson , G. A., Emadi, A. (2005, July). Constant power loads and negative impedance instability in sea and undersea vehicles statement of the problem and comprehensive large-signal solution. In Electric Ship Technologies Symposium, 2005 IEEE (pp. 313-320). IEEE.12 Siegers, J., Arrua, S., Santi, E. (2017). Stabilizing Controller Design for Multibus MVdc Distribution Systems Using a Passivity-Based Stability Criterion and Positive Feedforward Control. IEEE Journal of Emerging and Selected Topics in Power Electronics, 5(1), 14-27.13 Sudhoff, S. D., Crider, J. M. (2011, April). Advancements in generalized immittance based stability analysis of DC power electronics based distribution systems. In Electric Ship Technologies Symposium (ESTS), 2011 IEEE (pp. 207-212). IEEE.14 Sun, J. (2011). Impedance-based stability criterion for grid-connected inverters. IEEE Transactions on Power Electronics, 26(11), 3075-3078.15 Zadeh, M. K., Gavagsaz-Ghoachani, R., Martin, J., Pierfederici, S., Nahid-Mobara keh, B., Molinas, M. (2014). A new discrete-time modelling of PWM converters for stability analysis of DC microgrid. Proc Electrimacs14, 1-6.16 Zadeh, M. K., Gavagsaz-Ghoachani, R., Martin, J. P., Pierfederici, S., Nahid-Mobarakeh, B., Molinas, M. (2015, March). Discrete-time modelling, stability analysis, and active stabilization of dc distribution systems with constant power loads. In Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE (pp. 323-329). IEEE.17 Zenger, K., Altowati, A., Suntio, T. (2006, November). Stability and performance analysis of regulated converter systems. In IEEE Industrial Electronics, IECON 2006-32nd Annual Conference on (pp. 1975-1980). IEEE.Attachment 1 Timeline ChartAttachment 2 Risk Assessment MatrixRisk ReferenceRisksConsequencesCurrentRisk TreatmentsCurrent level of RiskAdditionalRisk TreatmentsResidual Level of RiskLikelihoodConsequenceRisk LevelRankingLikelihoodConsequenceRisk LevelRankingSUPNot available on campusNot get eno ugh informationContact through mail000LNot necessitate000LHLTH-1Health problem hold in projectPrecaution needed011LNot necessary000LHLTH-2Eye related problemEye burning precise less chance112LWear glasses122LPER-1Family issuesNot concentre on work formulate management223MProgress work122MPER-2sickness thin work efficiencyTake rest011MTake medicines012MEQP-1Laptop not workingLost dataBackup or save file223LOnline store cloud001LCMP-1Cable not workingNot charging properlyProtect the cable111LExtra cable001LCMP-2 tangled screen problemNot getting dataUse keyboard001LNot required000LSFT-1Software not availableWork delayTry another software012LNot required000LActivity Overall Risk Rating0.00LOw