| 引用本文: | 肖仕武,邹亚麟,王树一,方华林.发电厂不同厂用电环并操作问题[J].电力自动化设备,2009,(7): |
| .Parallel connection of different high-voltage plant buses[J].Electric Power Automation Equipment,2009,(7): |
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| 摘要: |
| 具有不同电压等级高压母线的电厂,在发生6 kV厂用电环并切换时将形成高低压环网并产生环流,其大小主要取决于环网断口两侧电压相量差,两侧电压幅值差直接影响无功环流大小,两侧电压相位差直接影响有功环流大小.以某具体电厂为例,使用BPA程序建立计算模型,分析了不同运行方式下高低压环网中环流的大小及其影响.在高低压母线间联络变压器投运下,断口两侧电压之间主要是幅值差,将产生较大的无功环流;在高低压母线间联络变压器退出运行下,断口两侧电压之间主要是相位差,产生较大的有功环流.通过调节变压器分接头可以减小引起无功环流的电压幅值差;有功环流的调整相对较困难,为了防止较大的有功环流必须避免高低压联络变压器退出运行情况下进行环并操作,也可以通过采用移相器等措施调整相位以减少有功环流. |
| 关键词: 环网 有功环流 无功环流 潮流计算 移相器 |
| DOI： |
| 分类号:TM621 |
| 基金项目:长江学者和创新团队发展计划资助项目，华北电力大学博士学位教师科研基金? |
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| Parallel connection of different high-voltage plant buses |
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XIAO Shiwu1 ZOU Yalin1 WANG Shuyi2 FANG Hualin3
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| Abstract: |
| The 6 kV breaker switching operation in a power plant with different voltage buses may form a looped electric network connecting high and low voltage buses and generate circular power flow,which depends on the voltage difference.The circular reactive power is decided by the magnitude difference and the circular active power by the phase difference.With a power plant as an example,the calculation model is built with BPA simulation program to analyze the circular power flow under different operation modes.Whe... |
| Key words: looped electric network circular active power flow circular reactive power flow power flow calculation phase-shifter |
