| 基于故障点位置识别的串补线路距离保护方案 |
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| 引用本文： | 陈福锋,钱国明,魏曜.基于故障点位置识别的串补线路距离保护方案[J].电力系统自动化,2009,33(21):66-71. |
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| 作者姓名： | 陈福锋 钱国明 魏曜 |
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| 作者单位： | 国电南京自动化股份有限公司,江苏省南京市,210003 |
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| 摘 要： | 分析并指出了电平检测方案存在的灵敏度不足的问题.简单介绍了利用保护测量电流、电压计算保护安装处至串补电容之间沿线各点电压的方法,并分别分析了在串补电容前和串补电容后故障以此方法所计算得到的沿线各点电压幅值的特点.在电容前金属性故障时,保护安装处至电容之间将出现电压极小值点,且电压幅值理论上为0;在电容后故障时,计算电压即使出现极值点其幅值也较高.据此提出了串补线路故障点位置识别的方法,结合传统距离保护形成了适用于串补线路的距离保护新方案.该方案能在可靠防止超越的基础上很大程度地提高距离保护的灵敏度.EMTP仿真验证了该方案的有效性和可靠性.
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| 关 键 词： | 距离保护 串联补偿电容 沿线电压 故障点位置识别 灵敏度 |
| 收稿时间： | 4/7/2009 3:37:01 PM |
| 修稿时间： | 2009/10/26 0:00:00 |
Distance Protection Scheme for Series Compensated Lines Based on the Fault Point Identification |
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| CHEN Fufeng,QIAN Guoming,WEI Yao.Distance Protection Scheme for Series Compensated Lines Based on the Fault Point Identification[J].Automation of Electric Power Systems,2009,33(21):66-71. |
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| Authors: | CHEN Fufeng QIAN Guoming WEI Yao |
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| Affiliation: | CHEN Fufeng,QIAN Guoming,WEI Yao(Guodian Nanjing Automation Co.Ltd.,Nanjing 210003,China) |
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| Abstract: | The analysis shows that sensitivity of voltage-detected program for the existing line distance protection of series compensation is insufficient.Based on uniform transmission line positive and negative traveling wave equation,the along line voltage calculating formula is derived with the measuring current and voltage.The characteristics of calculating along line voltage is analyzed separately for fault point before and after the compensated capacitors.The calculating along line voltage will appear minimum a... |
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| Keywords: | distance protection series compensation capacitors line voltage fault point identification sensitivity |
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