电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2014年
3期
1-8
,共8页
卜繁多%梁志珊%夏鹏程
蔔繁多%樑誌珊%夏鵬程
복번다%량지산%하붕정
风力发电%永磁同步发电机组%双馈异步发电机组%快速切换%切换判据
風力髮電%永磁同步髮電機組%雙饋異步髮電機組%快速切換%切換判據
풍력발전%영자동보발전궤조%쌍궤이보발전궤조%쾌속절환%절환판거
wind power generation%permanent magnet synchronous generators%double fed induction generator%fast transfer%transfer criterion
风力发电的大量接入使配电网成为有源网络，影响了快速切换装置的正确动作。以含有风力发电（永磁同步发电机组和双馈异步发电机组）的某石化厂6 kV终端变电站为例，利用电力系统分析软件包EDSA建立仿真模型，分析风力发电对快速切换装置的影响。仿真结果表明：含有永磁同步发电机组的变电站在发出的无功功率小于负载所需的无功功率时，有利于进行快速切换，而在发出的无功功率大于负荷所需的无功功率时，会出现电压升高的情况，很有可能超过设备的保护定值，需要修改现有的切换判据；含有双馈异步发电机组的变电站无论发电机组发出的有功功率大于或小于负荷所需的有功功率，均不利于进行快速切换。针对含有风力发电的变电站提出了改进的快速切换判据：对于含有永磁同步发电机组的变电站增加了现有判据中对母线电压上限的约束，对于含有双馈异步风力发电机组的变电站扩大了现有判据中对母线电压下限的约束。
風力髮電的大量接入使配電網成為有源網絡，影響瞭快速切換裝置的正確動作。以含有風力髮電（永磁同步髮電機組和雙饋異步髮電機組）的某石化廠6 kV終耑變電站為例，利用電力繫統分析軟件包EDSA建立倣真模型，分析風力髮電對快速切換裝置的影響。倣真結果錶明：含有永磁同步髮電機組的變電站在髮齣的無功功率小于負載所需的無功功率時，有利于進行快速切換，而在髮齣的無功功率大于負荷所需的無功功率時，會齣現電壓升高的情況，很有可能超過設備的保護定值，需要脩改現有的切換判據；含有雙饋異步髮電機組的變電站無論髮電機組髮齣的有功功率大于或小于負荷所需的有功功率，均不利于進行快速切換。針對含有風力髮電的變電站提齣瞭改進的快速切換判據：對于含有永磁同步髮電機組的變電站增加瞭現有判據中對母線電壓上限的約束，對于含有雙饋異步風力髮電機組的變電站擴大瞭現有判據中對母線電壓下限的約束。
풍력발전적대량접입사배전망성위유원망락，영향료쾌속절환장치적정학동작。이함유풍력발전（영자동보발전궤조화쌍궤이보발전궤조）적모석화엄6 kV종단변전참위례，이용전력계통분석연건포EDSA건립방진모형，분석풍력발전대쾌속절환장치적영향。방진결과표명：함유영자동보발전궤조적변전참재발출적무공공솔소우부재소수적무공공솔시，유리우진행쾌속절환，이재발출적무공공솔대우부하소수적무공공솔시，회출현전압승고적정황，흔유가능초과설비적보호정치，수요수개현유적절환판거；함유쌍궤이보발전궤조적변전참무론발전궤조발출적유공공솔대우혹소우부하소수적유공공솔，균불리우진행쾌속절환。침대함유풍력발전적변전참제출료개진적쾌속절환판거：대우함유영자동보발전궤조적변전참증가료현유판거중대모선전압상한적약속，대우함유쌍궤이보풍력발전궤조적변전참확대료현유판거중대모선전압하한적약속。
The large-scale access of wind power generation to the distribution network makes it become the active network and affects the correct action of the fast transfer devices. This paper takes a 6 kV terminal substation of a petrochemical plant with the wind power generation connected for example, builds a simulation model by the EDSA software and analyzes the influence on fast transfer caused by the wind power generation (permanent magnet synchronous generators and double fed induction generator). The simulation results show that it’s helpful for fast transfer while the reactive power of permanent magnet synchronous generators is smaller than that of the loads. However, it needs to modify the available transfer criterion because the bus voltage will grow up or may exceed the protection setting value of the device when the reactive power of permanent magnet synchronous generators is larger than that of the loads. The situation that the active power of double fed induction generators is larger or smaller than that of the loads is not helpful for fast transfer. Meanwhile, this paper presents an improved fast transfer criterion for the power system with the wind power generation:adding the upper limit's constraint of bus voltage in the available transfer criterion for the power system with the permanent magnet synchronous generators;and enlarging the lower limit's constraint of bus voltage in the available transfer criterion for the power system with the double fed induction generator.
