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1、.配電變壓器空載無(wú)功損耗的就地補(bǔ)償容量的計(jì)算在配電系統(tǒng)中變壓器的空載無(wú)功損耗是用來(lái)產(chǎn)生激磁電流，或者說(shuō)是空載電流I0的，與負(fù)荷無(wú)關(guān)。而且當(dāng)一次電壓不變時(shí)，其值基本上是個(gè)恒量。由電工原理知道：電容電流與電感電流方向相反，其相位超前電壓90°.利用這個(gè)原理，可以用電容電流來(lái)抵消變壓器的激磁電流（即電感電流），使電網(wǎng)總的無(wú)功電流減少，具體辦法是配電變壓器高壓側(cè)就地并入適當(dāng)容量的電容器。補(bǔ)償之后，這部分無(wú)功功率不像補(bǔ)償前那樣由電網(wǎng)輸送，而且由就地補(bǔ)償電容器供給。這樣可以提高電網(wǎng)輸送能力，減少線路和變壓器損耗，減輕電源負(fù)擔(dān)。根據(jù)變壓器空載無(wú)功損耗計(jì)算公式：式中：I空%—變壓器空

2、載電流的百分值（標(biāo)么值）：Sn—變壓器額定容量，KVA所需安裝補(bǔ)償電容器容量用Qc表示，Qc=Q空，即得：【例1】查產(chǎn)品目錄手冊(cè)的SL7-200/10型變壓器的空載電流為2.4，則【例2】查產(chǎn)品目錄手冊(cè)的S7-200/10型變壓器的空載電流為1.5，則...產(chǎn)品目錄所列變壓器空載電流百分值是一個(gè)保證值，實(shí)際上生產(chǎn)出來(lái)的變壓器的空載電流百分值遠(yuǎn)小于此值，一般僅為保證值的50%～60%左右，實(shí)際計(jì)算時(shí)，應(yīng)從實(shí)際產(chǎn)品樣本或說(shuō)明書上查得空載電流百分值。變壓器損失計(jì)算數(shù)據(jù)型號(hào)容?量空載損失短路損失空載電流短路電壓有功不變損失無(wú)功不變損失有功損失常數(shù)無(wú)功損失常數(shù)S7800.271

3、.652.404.5019413821.28906252.8125000S71000.322.002.304.5023016561.00000002.2500000S71600.462.852.104.5033124190.55664061.4062500S72000.543.402.104.5038930240.42500001.1250000S72500.644.002.004.5046136000.32000000.9000000S73150.764.802.004.5054745360.24187450.7142857S74000.925.801.904.50

4、66254820.18125000.5625000S75001.086.901.904.5077868400.13800000.4500000S76301.408.501.805.50100881650.10707990.4365079S78001.6610.401.805.501195103680.08125000.3437500S710001.9312.181.705.501390122400.06090000.2750000S712502.3514.491.605.501692144000.04636800.2200000S716003.0017.301.505

5、.502160172800.03378910.1718750S9300.130.602.104.00944543.33333336.6666667S9500.170.872.004.001227201.74000004.0000000S9630.201.041.904.001448621.31015373.1746032S9800.241.251.804.0017310370.97656252.5000000S91000.291.501.604.0020911520.75000002.0000000S91250.341.801.504.0024513500.57600

6、001.6000000S91600.402.201.404.0028816130.42968751.2500000S92000.482.601.304.0034618720.32500001.0000000S92500.563.051.204.0040321600.24400000.8000000S93150.673.651.104.0048224950.18392540.6349206S94000.804.301.004.0057628800.13437500.5000000S95000.965.101.004.0069136000.10200000.4000000

7、S96301.206.200.904.5086440820.07810530.3571429S98001.407.500.804.50100846080.05859380.2812500S910001.7010.300.704.50122450400.05150000.2250000S912501.9512.000.604.50140454000.03840000.1800000S916002.4014.500.604.50172869120.02832030.1406250SJ1000.732.407.504.5052654001.20000000