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This article analyzes the characteristics of single phase grounding faults and cross line grounding faults in the same tower double circuit line, as well as the impact of zero sequence mutual inductance on grounding distance protection, in response to the misoperation fault of under range longitudinal distance protection during a cross line grounding fault on the same tower double circuit line. It is concluded that the additional impedance caused by zero sequence mutual inductance is the fundamental reason for the reduction of grounding distance protection range and the refusal of protection. In order to solve the problem, an adaptive zero sequence mutual inductance compensation method is proposed. The new method based on the adjacent zero sequence current injection and local auxiliary judgement can enable the compensation adaptively. The performance of the proposed method is evaluated based on the real time digital simulation system, and results show that this method is valid.
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针对一起同塔双回线发生跨线接地故障时欠范围纵联距离保护拒动事件,本文分析同塔双回线单相接地故障与跨线接地故障的特征,以及零序互感对接地距离保护的影响,得出零序互感带来的附加阻抗是引起接地距离保护范围缩小并导致欠范围纵联距离保护拒动的根本原因。为避免零序互感对同塔双回线接地距离保护范围的影响,须对零序互感进行补偿,因此本文提出一种自适应补偿方法,通过引入邻线零序电流,结合本线零序电流方向和相电流方向,实现对零序互感的自适应补偿。最后,利用实时数字仿真系统对本文所提补偿方法进行评估,仿真结果证明了所提方法的有效性。
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张洪喜(1983—),男,河南省鲁山县人,硕士,主要从事电力系统继电保护的研究和开发工作。
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张洪喜(1983—),男,河南省鲁山县人,硕士,主要从事电力系统继电保护的研究和开发工作。
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张洪喜(1983—),男,河南省鲁山县人,硕士,主要从事电力系统继电保护的研究和开发工作。
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故障时线路1左侧电压、电流录波, figureFileSmall=heVwHzgJyb5DojfoWdEiWQ==, figureFileBig=OaQF3MgsGjDg6ZJzJKAhlQ==, tableContent=null), ArticleFig(id=1194259282532201108, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=EN, label=null, caption=null, figureFileSmall=6Nv52jYef5S38767Fzqsug==, figureFileBig=agstGRDxo7kxaVwksm6Grw==, tableContent=null), ArticleFig(id=1194259282595115669, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=CN, label=图3, caption=
故障时线路1右侧电压、电流录波, figureFileSmall=6Nv52jYef5S38767Fzqsug==, figureFileBig=agstGRDxo7kxaVwksm6Grw==, tableContent=null), ArticleFig(id=1194259282658030230, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=EN, label=null, caption=null, figureFileSmall=oFfGdjt7r4+p1tZwGUAGcg==, figureFileBig=ktLFemJ7cT5Bz+3MlRQp/w==, tableContent=null), ArticleFig(id=1194259282725139095, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=CN, label=图4, caption=
线路1左侧装置测量阻抗轨迹, figureFileSmall=oFfGdjt7r4+p1tZwGUAGcg==, figureFileBig=ktLFemJ7cT5Bz+3MlRQp/w==, tableContent=null), ArticleFig(id=1194259282796442264, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=EN, label=null, caption=null, figureFileSmall=tA3dsD87bCNCJMrcTYjuYQ==, figureFileBig=WwP+1i8qOif+kh6QA0cXog==, tableContent=null), ArticleFig(id=1194259282863551129, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=CN, label=图5, caption=
线路1右侧装置测量阻抗轨迹, figureFileSmall=tA3dsD87bCNCJMrcTYjuYQ==, figureFileBig=WwP+1i8qOif+kh6QA0cXog==, tableContent=null), ArticleFig(id=1194259282930659994, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=EN, label=null, caption=null, figureFileSmall=H016DHDN558JSyYg/ZzB8Q==, figureFileBig=OKc3M7SQoflLGvOroB0dVA==, tableContent=null), ArticleFig(id=1194259282989380251, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=CN, label=图6, caption=
两节点同塔双回线单相接地等效模型, figureFileSmall=H016DHDN558JSyYg/ZzB8Q==, figureFileBig=OKc3M7SQoflLGvOroB0dVA==, tableContent=null), ArticleFig(id=1194259283064877724, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=EN, label=null, caption=null, figureFileSmall=Fc0GfJ0OZ5RPmcwyCJ8iBA==, figureFileBig=iTfcgg0eTEpW08nzn1V67A==, tableContent=null), ArticleFig(id=1194259283152958109, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=CN, label=图7, caption=
双回线单相跨线接地故障模型, figureFileSmall=Fc0GfJ0OZ5RPmcwyCJ8iBA==, figureFileBig=iTfcgg0eTEpW08nzn1V67A==, tableContent=null), ArticleFig(id=1194259283215872670, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=EN, label=null, caption=null, figureFileSmall=sevUGx5w0ig8g1tYRhIhLQ==, figureFileBig=kYn0Ek8z6fHEbiggkbdgrg==, tableContent=null), ArticleFig(id=1194259283295564447, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=CN, label=图8, caption=
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基于5G通信的自适应补偿系统, figureFileSmall=TIlXPVU8MtQhIyJVgk9iMw==, figureFileBig=OhnxjllKSF5lq8+Y2bGVGA==, tableContent=null), ArticleFig(id=1194259283798880932, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=EN, label=null, caption=null, figureFileSmall=ZcOSBVYGxUG46GUufdVVyw==, figureFileBig=NxQet/lfKaRb14bT7fy8tA==, tableContent=null), ArticleFig(id=1194259283907932837, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=CN, label=图11, caption=
线路${L}_{\mathrm{Ⅰ}}$左侧补偿后的测量阻抗轨迹, figureFileSmall=ZcOSBVYGxUG46GUufdVVyw==, figureFileBig=NxQet/lfKaRb14bT7fy8tA==, tableContent=null), ArticleFig(id=1194259283983430310, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=EN, label=null, caption=null, figureFileSmall=1+QbDVQuc8YI7hvUI5CKMA==, figureFileBig=M/2cxzNKHooVB07xElOn/A==, tableContent=null), ArticleFig(id=1194259284058927783, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=CN, label=图12, caption=
线路${L}_{\mathrm{Ⅰ}}$右侧补偿后的测量阻抗轨迹, figureFileSmall=1+QbDVQuc8YI7hvUI5CKMA==, figureFileBig=M/2cxzNKHooVB07xElOn/A==, tableContent=null), ArticleFig(id=1194259284151202472, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
| 线路长度L/km | 13.95 |
| 正序阻抗Z1/Ω | 0.61+j8.21 |
| 零序阻抗Z0/Ω | 7.63+j28.30 |
| 零序互阻抗Zm0/Ω | 6.17+j21.10 |
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同塔双回线路参数
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| 参数 | 数值 |
| 线路长度L/km | 13.95 |
| 正序阻抗Z1/Ω | 0.61+j8.21 |
| 零序阻抗Z0/Ω | 7.63+j28.30 |
| 零序互阻抗Zm0/Ω | 6.17+j21.10 |
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| 运行方式 | 故障类型 | 故障位置 | 补偿功能 | 动作结果 (距离Ⅰ段) |
L1 运行 L2 运行 | L1(AG) | L1(10%) | 投入 | L1动作 |
| L2(BG) | L2(10%) | 投入 | L2动作 |
| L1(BG) | L1(50%) | 投入 | L1动作 |
| L2(CG) | L2(50%) | 投入 | L2动作 |
| L1(CG) | L1(75%) | 投入 | L1动作 |
| L2(AG) | L2(75%) | 投入 | L2动作 |
| L1(AG) | L1(85%) | 投入 | L1不动作 |
| L2(BG) | L2(85%) | 投入 | L2不动作 |
| L1(BG) | L1(90%) | 投入 | L1不动作 |
| L2(CG) | L2(90%) | 投入 | L2不动作 |
| L1(AG) | L1(10%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
| L1(BG) | L1(50%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
| L1(CG) | L1(75%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
| L1(AG) | L1(85%) | 投入 | L1不动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
| L1(BG) | L1(90%) | 投入 | L1不动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
L1 运行 L2 停运 (接地) | L1(AG) | L1(10%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | |
| L1(BG) | L1(50%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | |
L1 运行 L2 停运 (接地) | L1(CG) | L1(75%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | |
| L1(BG) | L1(85%) | 投入 | L1不动作 |
| L2无故障 | L2无故障 | 不投 | |
| L1(CG) | L1(90%) | 投入 | L1不动作 |
| L2无故障 | L2无故障 | 不投 | |
), ArticleFig(id=1194259284360917675, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1194204265209102645, language=CN, label=表2, caption=
RTDS部分测试结果
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| 运行方式 | 故障类型 | 故障位置 | 补偿功能 | 动作结果 (距离Ⅰ段) |
L1 运行 L2 运行 | L1(AG) | L1(10%) | 投入 | L1动作 |
| L2(BG) | L2(10%) | 投入 | L2动作 |
| L1(BG) | L1(50%) | 投入 | L1动作 |
| L2(CG) | L2(50%) | 投入 | L2动作 |
| L1(CG) | L1(75%) | 投入 | L1动作 |
| L2(AG) | L2(75%) | 投入 | L2动作 |
| L1(AG) | L1(85%) | 投入 | L1不动作 |
| L2(BG) | L2(85%) | 投入 | L2不动作 |
| L1(BG) | L1(90%) | 投入 | L1不动作 |
| L2(CG) | L2(90%) | 投入 | L2不动作 |
| L1(AG) | L1(10%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
| L1(BG) | L1(50%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
| L1(CG) | L1(75%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
| L1(AG) | L1(85%) | 投入 | L1不动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
| L1(BG) | L1(90%) | 投入 | L1不动作 |
| L2无故障 | L2无故障 | 不投 | L2不动作 |
L1 运行 L2 停运 (接地) | L1(AG) | L1(10%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | |
| L1(BG) | L1(50%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | |
L1 运行 L2 停运 (接地) | L1(CG) | L1(75%) | 投入 | L1动作 |
| L2无故障 | L2无故障 | 不投 | |
| L1(BG) | L1(85%) | 投入 | L1不动作 |
| L2无故障 | L2无故障 | 不投 | |
| L1(CG) | L1(90%) | 投入 | L1不动作 |
| L2无故障 | L2无故障 | 不投 | |
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