Optimization Design of Grounding Grid Model for 500kV Substation

Author(s):  
Hao Zhang ◽  
Qiang Liu ◽  
Meirong Chen ◽  
Wei Wang ◽  
Ding Huang ◽  
...  
Author(s):  
Haize Hu ◽  
Richeng Luo ◽  
Mengge Fang ◽  
Shuiling Zeng ◽  
Feiyu Hu

2014 ◽  
Vol 492 ◽  
pp. 443-446 ◽  
Author(s):  
Ang Ren ◽  
Qing Quan Li ◽  
Ran Liu ◽  
Yan Feng Qi ◽  
Xu Jie Liu ◽  
...  

The paper briefly introduces the function and characteristics of the ground simulation software CDEGS, and computes the grounding grid model by using the MALZ module. The grounding grid GPR (Ground Potential Rise) and the percentage of reference power bus GPR are analyzed after the exciting current source injected into the grounding grid, and compared and analyzed with CDEGS softwares simulation calculation results, it is easy to diagnose defect and locate defect position in the grounding grid.


2020 ◽  
Vol 64 (1-4) ◽  
pp. 165-172
Author(s):  
Dongge Deng ◽  
Mingzhi Zhu ◽  
Qiang Shu ◽  
Baoxu Wang ◽  
Fei Yang

It is necessary to develop a high homogeneous, low power consumption, high frequency and small-size shim coil for high precision and low-cost atomic spin gyroscope (ASG). To provide the shim coil, a multi-objective optimization design method is proposed. All structural parameters including the wire diameter are optimized. In addition to the homogeneity, the size of optimized coil, especially the axial position and winding number, is restricted to develop the small-size shim coil with low power consumption. The 0-1 linear programming is adopted in the optimal model to conveniently describe winding distributions. The branch and bound algorithm is used to solve this model. Theoretical optimization results show that the homogeneity of the optimized shim coil is several orders of magnitudes better than the same-size solenoid. A simulation experiment is also conducted. Experimental results show that optimization results are verified, and power consumption of the optimized coil is about half of the solenoid when providing the same uniform magnetic field. This indicates that the proposed optimal method is feasible to develop shim coil for ASG.


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