BT?I0%SN0.8?40?5??2.64?10S22100UN100?110GT?P046??3.8?10?6S221000UN1000?110（3）3号变电所
2PKUN121?1102RT???2.34?221000SN1000?25BT?I0%SN0.9?25?5??1.86?10S2100UN100?11022UK%UN10.5?1102XT???50.82?100SN100?25
GT?P032.5??2.69?10?6S221000UN1000?1104.3 网络潮流计算
4.3.1 最大、最小负荷时的运算负荷功率的计算
（1）1号变电所
a.在最大负荷运行情况下运算负荷功率
??P~?SZT1??n?P0?Sn???S??S?N????222??47?42?8.4?3??10??2?31??2?31.5?????2?????10?3?0.105MW ????222?I0%SNUS%SN?S?~0.8?31.510.5?31.5?40?8.4?? ???SYT1?n??2?????100100n?SN?100100?2?31.5?? ?3.92MVar Q172.11Q156.57?1.33MVar 1?2??3.504??0.99MVar A?1??3.675?2210022100Q?~~~~?QS1?M?S1??SZT1??SYT1?j?A?1?1?2?
2??2 ?42?j8.4?0.105?j3.29?j(1.33?0.99)?42.105?j9.37MVA
b.在最小负荷运行情况下运算负荷功率
cos?1?0.98
~S1m?P0.98)?25?j5.08MVA 1m?jQ1m?25?j25?tan(arccos
第 23 页
??P~?SZT1??n?P0?Sn???S??S?N????2??47?252?5.082?3???10??2?31?2?31.5????? ?0.081MW
?S??S?N??? ?22?????10?3 ????I%SNUS%SN~?SYT1?n0?100100n22?0.8?31.510.5?31.5?25?5.08?? ?2???100100?2?31.5?? ?1.584MVar QA?1172.11Q156.57??3.675??1.33MVar 1?2??3.504??0.99MVar 2210022100Q?~~~~?QS1?m?S1??SZT1??SYT1?j?A?1?1?2?
2??2 ?25?j5.08?0.081?j1.584?j(1.33?0.99)?25.081?j4.34MVA
(2)2号变电所
a.在最大负荷运行情况下运算负荷功率
22??174?50?10?3???10??2?46?2?40????? ?0.202MW
~?SZT2??P??n?P0?Sn???S??S?N????2?????10?3 ????222?I0%SNUS%SN?S?~0.7?4010.5?40?50?10?? ???SYT2?n??2?????100100n?SN?100100?2?40?? ?3.97MVar QA?2182.46Q156.57??3.721??1.53MVar 1?2??3.504??0.99MVar 22100221002Q?~~~~?Q?M?S2??SZT2??SYT2?j?A?2?1?2? S22??2 ?50?j10?0.202?j3.97?j(1.53?0.99)?50.202?j11.45MVA
b.在最小负荷运行情况下运算负荷功率
cos?1?0.98
~S2m?P2m?jQ2m?35?j35?tan(arccos0.98)?35?j7.1MVA ??P~?SZT2??n?P0?Sn??
?S??S?N????222??174?35?7.1?3???10??2?46?2?40??????????10?3 ????第 24 页
?0.170MW
22?I0%SNUS%SN?S?~0.7?4010.5?40?35?7.1?? ???SYT2?n??2?????100100n?SN?100100?2?40?? ?2.23MVar QA?2182.46Q156.57??3.721??1.53MVar 1?2??3.504??0.99MVar 221002210022Q?~~~~?QS2?m?S2??SZT2??SYT2?j?A?2?1?2?
2??2 ?35?j7.1?0.17?j2.23?j(1.53?0.99)?35.17?j6.81MVA
(3)3号变电所
a.在最大负荷运行情况下运算负荷功率
22??121?35?7?3???10??2?31?2?25????? ?0.148MW
??P~?SZT3??n?P0?Sn???S??S?N????2?????10?3 ????22I0%SNUS%SN?S?~0.9?2510.5?25?35?7????SYT3?n??2????100100n?SN?100100?2?25? ?2.68MVar
2?? ??2QA?3?3.504MVar
~~~~S3?M?S3??SZT3??SYT3?jQA?3
?35?j7?0.148?j2.68?j3.504 ?35.148?j6.176MVA
b.在最小负荷运行情况下运算负荷功率
cos?1?0.98
~S3m?P0.98)?28?j5.69MVA 3m?jQ3m?28?j28?tan(arccos22??121?28?5.69?3???10??2?31?2?25????? ?0.131MW
??P~?SZT3??n?P0?Sn???S??S?N????2?????10?3 ????22I0%SNUS%SN?S?~0.9?2510.5?25?28?5.69????SYT3?n??2????100100n?SN?100100?2?25? ?2.164MVar
2?? ??2
第 25 页
QA?3163.25??3.504??1.108MVar 22100~~~~S3?m?S3??SZT3??SYT3?jQA?3
?28?j5.69?0.131?j2.164?j1.108 ?28.131?j6.746MVA
4.3.2 电源运算功率的计算
(1)最大负荷运行情况
根据原始资料cos?A?0.95，发电厂A的最大负荷为：
~SAM?PAM?jQAM?143.23?j143.23?tan?arccos0.95??143.23?j47.077MVA ~?SZTA??P??n?P0?Sn???S??S?N????2???10?3 ???????10?3 ????22?422?143.23?47.077? ??2?107?2?120??? ?0.479MW
~?SYTAI0%SNUS%SN?S??n?100100n??SN??? ?20.6?12010.5?120?143.232?47.0772? ?2??100100?2?120? ?11.385MVar
QA?2182.46??3.721??1.53MVar 22100QA?1172.11??3.675??1.33MVar 22100QA?3163.25??3.504??1.108MVar 22100Q?Q~~~~?Q??SA??SZTA??SYTA?j?A?2?A?1?A?3? SAM22??2?? ??2 ?143.23?j47.077?0.479?j11.385?j(1.53?1.33?1.108) ?143.709?j54.494MVA
(2)最小负荷运行情况
根据原始资料cos?A?0.95，发电厂A的最小负荷为：
第 26 页
~SAm?PAm?jQAm?97.96?j97.96?tan?arccos0.95??97.96?j32.198MVA ??P~?SZTA??n?P0?Sn???S??S?N????2???10?3 ???????10?3 ????22?422?97.96?32.198? ??2?107?2?120??? ?0.395MW
~?SYTAI%SNUS%SN?S??n0?100100n??SN??? ?2220.6?12010.5?120?97.96?32.198? ?2??100100?2?120? ?6.092MVar QA?2182.46??3.721??1.53MVar 22100QA?1172.11??3.675??1.33MVar 22100QA?3163.25??3.504??1.108MVar 22100?? ??2Q?Q~~~~?Q??SA??SZTA??SYTA?j?A?2?A?1?A?3? SAm22??2 ?97.96?j32.198?0.395?j6.092?j(1.53?1.33?1.108) ?98.355?j34.322MVA
4.4网络潮流计算
(1)当负荷最大时
~~**S1Z1*?2?ZA?S~?22?ZA?2 SA?1?***ZA?Z?Z?11?2A?2????42.105?j9.37???71.28?j0?12.37?j33.4???50.202?j11.45???12.37?j33.4?12.26?j29.57?71.28?j0?12.37?j33.48VA ?44.8?j7.26M
~~~S1?2?SA?1?S1?44.8?j7.268??42.105?j9.37??2.695?j2.092MVA ~~~SA?2?S2?S1?2?50.202?j11.45??2.695?j2.092??47.507?j13.542MVA
第 27 页