| 引用本文: | 商立群,马童童.目标支路减维的接地网双向故障诊断方法[J].电力系统保护与控制,2025,53(7):144-154.[点击复制] |
| SHANG Liqun,MA Tongtong.A bidirectional fault diagnosis method for grounding networks based on target branch dimension reduction[J].Power System Protection and Control,2025,53(7):144-154[点击复制] |
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| 摘要: |
| (西安科技大学电气与控制工程学院，陕西 西安710054)
摘要：为了减少变电站接地网故障诊断中经常出现误诊漏诊的情况，提出一种目标支路减维的接地网双向故障诊断方法。首先基于电网络理论建立接地网的模型。其次设置故障支路检测向和健康支路约简向，故障支路检测向实现模糊故障支路向明晰故障支路的转变，健康支路约简向根据评价函数定义故障影响系数，选出每次影响系数最高的支路作为目标减维对象，实现模糊健康支路拓扑结构的约简。最后采用经Logistic映射、自适应权重优化的改进萤火虫算法(improved firefly algorithm, IFA)对目标函数求解。通过对具体案例的诊断结果分析，验证了所提方法在确保诊断精度的同时，不易出现误诊漏诊的情况。 |
| 关键词: 接地网 腐蚀故障 双向诊断 目标支路减维 改进萤火虫算法 |
| DOI：10.19783/j.cnki.pspc.240942 |
| 投稿时间：2024-07-19修订日期：2024-10-21 |
| 基金项目:陕西省自然科学基础研究计划项目资助(2021JM393) |
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| A bidirectional fault diagnosis method for grounding networks based on target branch dimension reduction |
| SHANG Liqun,MA Tongtong |
| (College of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China) |
| Abstract: |
| To reduce the frequent occurrence of misdiagnosis and missed diagnosis in the fault diagnosis of substation grounding networks, a bidirectional fault diagnosis method based on target branch dimension reduction for grounding networks is proposed. First, a model of grounding network based on electrical network theory is established. Next, fault branch detection direction and healthy branch reduction direction are set. The fault branch detection direction transforms the fuzzy fault branches into clear fault branches, while the healthy branch reduction direction defines the fault influence coefficient based on the evaluation function. The branch with the highest influence coefficient is selected as the target dimension reduction object each time, achieving the reduction of fuzzy health branch topology structure. Finally, the improved firefly algorithm (IFA) with Logistic mapping and adaptive weight optimization is used to solve the objective function. Through simulation experiments on specific cases, the proposed method is verified to ensure diagnosis accuracy, while minimizing misdiagnosis and missed diagnosis. |
| Key words: grounding network corrosion fault bidirectional diagnosis target branch dimension reduction improved firefly algorithm |
