اراﺋﻪ روﺷﯽ ﻧﻮﯾﻦ ﺟﻬﺖ ﺗﺨﻤﯿﻦ ﺣﺎﻟﺖ دﯾﻨﺎﻣﯿﮑﯽ ﺷﺒﮑﻪ ﺗﻮزﯾﻊ ﺻﻨﻌﺘﯽ ﺑﺎ اﺳﺘﻔﺎده از اﻧﺪازه ﮔﯿﺮي ﻫﺎي ﻣﺤﺪود

A New Method for Dynamic State Estimation in Industrial Distribution Network Using A Few Measurements

ﭼﮑﯿﺪه: ﺗﺎﮐﻨﻮن ﺗﺨﻤﯿﻦ ﺣﺎﻟﺖ در ﺷﺒﮑﻪ ﻫﺎي ﺗﻮزﯾﻊ ﻧﺴﺒﺖ ﺑﻪ ﺷﺒﮑﻪ اﻧﺘﻘﺎل ﮐﻤﺘﺮ ﻣﻮرد ﺗﻮﺟﻪ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ. در ﺳﯿﺴﺘﻢ ﺗﻮزﯾﻊ ﺑﺮ ﺧﻼف ﺷﺒﮑﻪ اﻧﺘﻘﺎل دﺳﺘﮕﺎه ﻫﺎي اﻧﺪازه ﮔﯿﺮي در ﺑﺨﺶ ﻫﺎي ﻣﺨﺘﻠﻒ ﺷﺒﮑﻪ وﺟﻮد ﻧﺪارد. ﺑﻨﺎﺑﺮاﯾﻦ روش ﻫﺎي اراﺋﻪ ﺷﺪه ﮐﻪ ﻧﯿﺎز ﺑﻪ ﺗﻌﺪاد ﺑﺎﻻي اﻧﺪازه ﮔﯿﺮي در ﺷﺒﮑﻪ دارﻧﺪ را ﻧﻤﯽ ﺗﻮان در ﺳﯿﺴﺘﻢ ﻫﺎي ﺗﻮزﯾﻊ ﻣﻮرد اﺳﺘﻔﺎده ﻗﺮار داد. ﻫﻤﭽﻨﯿﻦ ﺑﻪ دﻟﯿﻞ وﺟﻮد ﺑﺎرﻫﺎي دﯾﻨﺎﻣﯿﮑﯽ و وﻗﻮع ﺗﻐﯿﯿﺮات ﻧﺎﮔﻬﺎﻧﯽ در ﺷﺒﮑﻪ ﻫﺎي ﺻﻨﻌﺘﯽ ﭼﺎﻟﺶ ﻫﺎي ﺑﺰرﮔﯽ در ﺗﺨﻤﯿﻦ ﺣﺎﻟﺖ ﺑﻪ وﺟﻮد ﻣﯽ آﯾﺪ. در اﯾﻦ ﻣﻘﺎﻟﻪ روﺷﯽ اراﺋﻪ ﺷﺪه اﺳﺖ ﮐﻪ ﺑﺎ ﮐﻤﮏ اﻧﺪازه ﮔﯿﺮي ﻫﺎي ﻣﺤﺪود ﺑﺘﻮان ﺣﺎﻟﺖ ﺷﺒﮑﻪ ﺗﻮزﯾﻊ ﺻﻨﻌﺘﯽ را ﺗﺨﻤﯿﻦ زد. ﺑﺮاي اﯾﻦ ﻣﻨﻈﻮر ﺣﺎﻻت ﻣﺨﺘﻠﻒ ﻋﻤﻠﮑﺮد ﺑﺎرﻫﺎي ﭘﺎﯾﯿﻦ دﺳﺖ ﻓﯿﺪرﻫﺎﯾﯽ ﮐﻪ دﺳﺘﮕﺎه اﻧﺪازه ﮔﯿﺮي ﺑﺮ روي آن ﻫﺎ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ در دﺳﺘﺮس ﺗﺨﻤﯿﻦ ﮔﺮ ﻗﺮار ﮔﺮﻓﺘﻪ و ﺑﻪ ﮐﻤﮏ ﻣﻘﺎدﯾﺮ اﻧﺪازه ﮔﯿﺮي درﯾﺎﻓﺘﯽ، ﺣﺎﻟﺖ ﺷﺒﮑﻪ ﻣﺸﺨﺺ ﻣﯽ ﺷﻮد. روش ﭘﯿﺸﻨﻬﺎدي در آزﻣﺎﯾﺸﮕﺎه آﻧﺎﻟﯿﺰ ﺳﯿﺴﺘﻢ ﻫﺎي ﻗﺪرت در داﻧﺸﮕﺎه ﺻﻨﻌﺘﯽ اﻣﯿﺮﮐﺒﯿﺮ ﺑﺎ اﺗﺼﺎل دو راﯾﺎﻧﻪ ﺑﻪ ﯾﮑﺪﯾﮕﺮ ﺑﻪ ﺻﻮرت ﺳﺨﺖ اﻓﺰاري و در ﻣﺤﯿﻂ ﻧﺮم اﻓﺰار ﺷﺒﯿﻪ ﺳﺎز زﻣﺎن- واﻗﻌﯽ POUYA ﺑﻪ ﺻﻮرت ﻧﺮم اﻓﺰاري ﭘﯿﺎده ﺷﺪه و ﺑﺮ روي ﺷﺒﮑﻪ ﺗﻮزﯾﻊ ﯾﮏ ﭘﺎﻻﯾﺸﮕﺎه ﺷﯿﻤﯿﺎﯾﯽ ﺗﺴﺖ ﺷﺪه اﺳﺖ. ﯾﮑﯽ از راﯾﺎﻧﻪ ﻫﺎ در ﻧﻘﺶ ﺳﯿﺴﺘﻢ اﺳﮑﺎداي ﺳﯿﺴﺘﻢ ﻗﺪرت واﻗﻌﯽ اﺳﺖ و راﯾﺎﻧﻪ دﯾﮕﺮ در ﻧﻘﺶ ﻣﺪل ﺷﺒﯿﻪ ﺳﺎز)ﺗﺨﻤﯿﻦ ﮔﺮ دﯾﻨﺎﻣﯿﮑﯽ( ﻋﻤﻞ ﻣﯽ ﮐﻨﺪ.

So far, state estimation in distribution networks has been less attentioned than transmission networks. Measurement devices are not exist in different parts of the network in a distribution system unlike a transmission network. Therefore, proposed state estimation methods which require large number of measurements in the network can not be used in distribution systems. Also, due to the presence of dynamic loads and sudden changes in the industrial network, major challenges take place in the state estimation calculation process. In this paper, a method is proposed for estimating the industrial distribution network state with the help of limited measurements. For this purpose, different performance modes of the downstream loads on which the measurement device is placed are made available to the estimator and the network state is determined by the received measurement values. The proposed method has been implemented in the Power Systems Analysis Laboratory of Amirkabir University of Technology as a hardware device by connecting two computers and has been tested on a distribution network of a chemical plant in the form of software in POUYA real-time simulator. One computer plays the role of the SCADA system of the real power system, and the other computer acts as the simulator model (dynamic estimator).