核工業(yè)脈沖發(fā)電機組工藝簡(jiǎn)介及要求
脈沖發(fā)電機是一種慣性?xún)δ芗夹g(shù)，慣性?xún)δ苁且揽课矬w運動(dòng)來(lái)存儲能量的方式，存儲在高速旋轉的飛輪或機械中的能量為旋轉機械能。一般使用較小功率的拖動(dòng)機構，以相對長(cháng)的時(shí)間把一定質(zhì)量的轉子或飛輪慢慢地加速使其轉動(dòng)起來(lái)從而存儲足夠的動(dòng)能，根據需要利用其轉動(dòng)慣性脈沖地驅動(dòng)負載設備，把機械能轉變?yōu)殡姶拍堋?/p>
300MVA脈沖發(fā)電機組由8500kW繞線(xiàn)異步電動(dòng)機及300MVA脈沖發(fā)電機組成為一同軸系聯(lián)軸器連接，機組飛輪力矩為7300t.m2。 8500kW電動(dòng)機作為機組的拖動(dòng)電機，基本參數為6000V、991A，轉子開(kāi)路電壓2498V、轉子額定電流2062A。
圖1 脈沖發(fā)電機
風(fēng)水冷高壓變頻器技術(shù)總體方案
根據電機參數，選用HIVERT-Y6/1200（6kV/10000kW）高壓變頻裝置，額定輸出電流為1200A，適配電機功率為10000kW。由手車(chē)斷路器式自動(dòng)旁路柜、啟動(dòng)柜、主變壓器柜、功率單元柜、控制柜、水循環(huán)系統、接線(xiàn)柜等幾部分組成。該項目結合脈沖發(fā)電機組的工況特性，融入了全數字矢量控制、IGBT并聯(lián)設計、疊層母排技術(shù)、單元制動(dòng)功能、水冷散熱方式等多項高端技術(shù)。
1.變頻裝置主電路圖
1.1 一次回路及保護
HIVERT系列高壓水冷變頻器采用交-直-交直接高壓（高-高）方式，主電路開(kāi)關(guān)元件為IGBT，功率單元采用串聯(lián)，疊波升壓，充分利用高壓變頻器的成熟技術(shù)，具有很高的可靠性。
隔離變壓器為三相干式整流變壓器，風(fēng)水冷。變壓器原邊輸入可為任意電壓，Y接；副邊繞組數量依變頻器電壓等級及結構而定，6kV系列為18個(gè)，延邊三角形接法，為每個(gè)功率單元提供三相電源輸入。為了最大限度抑制輸入側諧波含量，同一相的副邊繞組通過(guò)延邊三角形接法移相，繞組間的相位差由下式計算：
移相角度 = 60°/ 每相單元數量
由于為功率單元提供電源的變壓器副邊繞組間有一定的相位差，從而消除了大部分由單個(gè)功率單元所引起的諧波電流，所以HIVERT變頻器輸入電流的總諧波含量（THD）遠小于國家標準5%的要求，并且能保持接近1的輸入功率因數。三相輸出Y接，得到驅動(dòng)電機所需的可變頻三相高壓電源。which is very convenient and fast for data processing In this project, there are a lot of data to be read and written, and array processing is adopted, which is very good
4 process treatment package
S7-1200 has customized PID and motion control instruction package, which makes it easier for engineers to complete process and positioning control.
5 custom software components
In the past, the definition of soft components by PLC was determined before leaving the factory. For example, the number of counters and timers can not be changed. Often, the number of applied soft components is different in different applications. Sometimes the timer runs out and a large number of counters remain. S7-1200 has many advantages in this point. Soft components can be defined by itself. If you want to use a few, you can define a few, which is much more flexible and convenient.
In addition, I believe that there are many new features in s7-1200 applications to be developed and experienced.
4. Product hardware configurationThis part mainly makes a detailed description of the product hardware design around SIMATIC s7-1200 in the whole projec
