Nonintrusive Identification And Scheduling Of Power System Load

The incipience of smart grid makes it possible for the access of new kinds of energy and distributive energies,and the access ways have also changed a lot in spite of the loads difference in their source,their sites and their other characteristics.On account of the above mentioned innovations in smart grid,in case of high efficiency,high safety and high reliability in smart grid operation,loads identification and scheduling turns in to such kinds of pressing requirements to be dealt with.This paper aims to do something valuable in non-intrusive load identification and scheduling in smart grid,and the efforts were struggled to contribute to these promising works,for the tasks are so tough for a newcomer of master degree pursing student.And the main contents are listed as follows:First of all,the background and significance were balanced introduced to non-intrusive load identification and load scheduling.To be detailed,initial introduction was kicked off through the analysis of the importance of the stable operation of power systems,and accompanied by the discussion about the home and abroad status quo of the non-intrusive identification,then followed through the statements of the load shedding under lower frequency,which was declared to be the last defense line of the stable operation of the power system.Finally,the detailed contents in applying for the master thesis were provided.This work was introduced in the first chapter.And the second,algorithm of load non-intrusive identification was touched upon.And the algorithm research topic was brought in to the variable power load,and the pilot scale simulation tasks were started at the current waveform of the variable loads.Results shown that,the demonstrated algorithm to non-intrusive load identification only required the inlet current waveform of the loads,and in this kinds of sense,the method here had its advantage in less interference to the operation of the power system,besides that,both the fees and space requirements in fixture were saved,and the latter should be warmly welcomed by the users of the power system.And even further,the available rich information about the current waveform of the loads,such as the periodical characteristics in the curves of the current waveform,the prior known current zero value intervals can be great helps in deriving the linear equations of the current waveform,and with the aid of these conditions,the functional relationships were built between the first order and the higher order current harmonics,and only in this way,non-intrusive load identification of the power system was turned into reality.This work was introduced in the second chapter.It is well known that the non-intrusive load identification of the power system is always the basis of the stability and high efficiency of the power system operation,so load shedding under lower frequencies was also touched upon in case of completeness,this work was also in elementary level and it can be introduced at the third part of the thesis.Thirdly,considering the serious imbalance between the electricity providers and electricity users,pump storage group was put forward to the load scheduling here,and to be specific,only load shedding under lower frequencies was carried out,and at the same time,simulation analysis was also introduced in to verify the effectiveness and reliability of the proposed strategy to the employed pump storage group.This work was introduced in the third chapter.Finally,the summary together with the prospects of the work was briefly offered.It was the work of the forth chapter.