CAJ | 학술논문

为提高接地系统仿真分析及设计的效率，提出并设计了一种以Qt库为基础的接地计算仿真分析系统，能够计算水平分层土壤情况下各种形状接地网的接地电阻，以及故障电流入地时产生的跨步电压，接触电压和地电位升高等物理量。仿真系统由相互独立的数据输入模块、仿真计算分析模块和可视化显示输出模块三部分组成，通过引入观测线、观测面及虚拟围墙的概念，使得软件具有更高的灵活性和易用性。对系统中采用的改进导体切割算法，电阻矩阵的加速算法及跨步电压的计算算法进行了分析介绍。算例分析中，对仿真系统的计算精度进行了对比校核，并对某变电站“凸”字形接地网进行了仿真计算分析，验证了分析系统的有效性和实用性。
위제고접지계통방진분석급설계적효솔，제출병설계료일충이Qt고위기출적접지계산방진분석계통，능구계산수평분층토양정황하각충형상접지망적접지전조，이급고장전류입지시산생적과보전압，접촉전압화지전위승고등물리량。방진계통유상호독립적수거수입모괴、방진계산분석모괴화가시화현시수출모괴삼부분조성，통과인입관측선、관측면급허의위장적개념，사득연건구유경고적령활성화역용성。대계통중채용적개진도체절할산법，전조구진적가속산법급과보전압적계산산법진행료분석개소。산례분석중，대방진계통적계산정도진행료대비교핵，병대모변전참“철”자형접지망진행료방진계산분석，험증료분석계통적유효성화실용성。
In order to improve the efficiency in the simulation analysis and design of the grounding grid, the paper proposed and designed a Qt-based simulation analysis system of the grounding calculation, which could calculate the grounding resistance of various grounding grids in the horizontal layered soil, and such physical quantities as step volt-age, touch voltage and ground potential rise generated when fault current flew under the ground. The simulation sys-tem consisted of three mutually exclusive modules:the data input module, simulation calculation analysis module and visual display output module. Introduction of the concepts such as observation line, observation surface and virtual fence made the software more feasible and useable. The paper introduced and analyzed the improved conductor cuts algorithm, resistance matrix acceleration algorithm and step voltage calculation algorithm in the system. The calcula-tion accuracy of the simulation system was compared and checked, and the simulation calculation analysis was made on the convex-shaped grounding grid in a certain electric substation. The results verified the validity and practicability of the software.