Model Research And System Development Of Distribution Transformer Location Optimization

As the last link to the user, distribution network’s power loss occupies a large proportion in the whole power network loss. A proper distribution network is directly related to the economic benefit of power sector, electricity safety of the users. Therefore, studying on the location model of distribution transformer and development of the corresponding software has an important theory and practical significance. Main work in the paper is as following:(1) Research on the power load forecasting. Power load forecasting is the basis of distribution transformer location optimization, through comparative and analysis of the prediction algorithm, building the power load forecasting model based on grey system theory, then using the model forecast and analysis the future electricity of planning area.(2) Build the calculation model of distribution transformer economic number、economic capacity and economic power supply radius. The factors of power load、power load density、voltage rating and etc of the planning area are all influence to distribution transformer economic number、 economic capacity and economic power supply radius, in this paper, building the calculation model according the relevant parameter and calculating the transformer economic number、economic capacity and economic power supply radius of the planning area.(3)Put forward a kind of Modified-distribution transformer location optimization model (M-TLOM). In mountain、hilly areas, altitude of the load points has an important impact to transformer location results, at the same time, because of the existence of the sag in cabling process, the transmission line length is not straight line distance actually. For the reasons above, the paper modified the traditional distribution transformer location optimization model, introducing the line correction coefficient (a) because of the existence of the sag, and modified the line distance computational formula according introduce the altitude of the load points, to put forward the modified-distribution transformer location optimization model (M-TLOM).(4) Develop the software system of distribution transformer location optimization. In the paper, development a software system of distribution transformer location optimization (DTLOS1.0) based on Visual Basic6.0. This system includes three functions of power loud forecasting、transformer economic number calculating and transformer geographical position calculating.(5) Engineering example analysis. In order to verify the effect of modified model and the function of the system, according to the loud points’distribution of a regional, two results of the distribution transformer location optimization obtained by using the traditional and modified model respectively, from the results, we can found that the modified model can reduce the loss of distribution network.