摘要:隨著社會的發(fā)展和科技的進(jìn)步，電力在各行各業(yè)中的運(yùn)用越來越廣泛，也就需要更多的變電站。同時變電站的無人化已是一種趨勢。實(shí)現(xiàn)無人值班變電站既是降低電力系統(tǒng)運(yùn)行成本，也是提高電能質(zhì)量的重要手段之一。

　　　本設(shè)計(jì)主要進(jìn)行35kv/降壓變電站及無人值班的初步設(shè)計(jì)。在設(shè)計(jì)中遵循可靠、經(jīng)濟(jì)、實(shí)用的設(shè)計(jì)原則進(jìn)行變電站的布置和設(shè)備的選用，設(shè)計(jì)的內(nèi)容力求概念清楚，層次分明。主要內(nèi)容包括，電氣主接線的設(shè)計(jì)和選擇、負(fù)荷計(jì)算及變壓器的選擇、短路電流的計(jì)算、導(dǎo)線的選擇、電氣設(shè)備的選擇（母線、斷路器、隔離開關(guān)、互感器、熔斷器）、繼電保護(hù)配置、變電所調(diào)度自動化系統(tǒng)的設(shè)計(jì)等。

　　　附件包括：變電站電氣主接線圖、變電站自動化系統(tǒng)結(jié)構(gòu)圖、主要設(shè)備配置清單、短路電流計(jì)算表。

關(guān)鍵詞：降壓變電站；無人值班；綜合自動化系統(tǒng)；電氣主接線；開關(guān)柜

ABSTRACT:With the development of the society and the progress of science and technology, the electric power used in all walks of life more and more widely, also requires more substation. At the same time the unmanned transformer substation is a kind of trend. Realize the unattended substation is not only reduce the cost of power system operation, it is also one of important means to improve the quality of electric energy.

      This design mainly for 35 kv / 10 kv unmanned step-down substation design. In follow in the design of reliable, economic and practical design principles of substation layout and equipment selection, design to the content of the concept is clear, distinct. Mainly includes the main electrical wiring design and selection, load calculation and the selection of transformer, the calculation of short-circuit current, wire selection, selection of electrical equipment (bus, circuit breaker, isolating switch, current transformer, fuse), dispatching automation system of substation design.

     Accessories include: substation main electrical wiring diagram, 35 kv substation layout, side into the profile line interval.

Key words: step-down substation; No one on duty; Integrated automation system; The main electrical wiring; Switch cabinet .