CN110781630A - GIS equipment pipeline structure temperature difference stress deformation online monitoring method - Google Patents
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Abstract
本发明涉及GIS设备检测和维护技术领域，具体涉及一种GIS设备管线结构温差应力变形在线监测方法。该方法包括以下步骤：S101，建立GIS管线结构三维几何模型；S102，材料属性赋予、网格划分；S103，确定边界条件；S104，热应力分析；S105，应力结果、位移结果查看；S106，实时监控、安全评估。本发明优点：(1)本发明的方法简单有效。(2)可以解决人工监测方式成本大，测量精度差的问题。(3)模型参数可以灵活调整，应用范围广。(4)可以对GIS设备管线结构进行安全风险评估，保证设备安全稳定运行。
The invention relates to the technical field of GIS equipment detection and maintenance, in particular to an on-line monitoring method for temperature difference stress deformation of a pipeline structure of GIS equipment. The method includes the following steps: S101, establishing a three-dimensional geometric model of a GIS pipeline structure; S102, assigning material properties and meshing; S103, determining boundary conditions; S104, analyzing thermal stress; S105, viewing stress results and displacement results; S106, real-time Monitoring, security assessment. Advantages of the present invention: (1) The method of the present invention is simple and effective. (2) It can solve the problems of high cost and poor measurement accuracy of manual monitoring methods. (3) The model parameters can be adjusted flexibly and have a wide range of applications. (4) The safety risk assessment of the pipeline structure of GIS equipment can be carried out to ensure the safe and stable operation of the equipment.
Description
技术领域technical field
本发明涉及GIS设备检测和维护技术领域，具体涉及一种GIS设备管线结构温差应力变形在线监测方法。The invention relates to the technical field of GIS equipment detection and maintenance, in particular to an on-line monitoring method for temperature difference stress deformation of a pipeline structure of GIS equipment.
背景技术Background technique
气体绝缘金属封闭开关设备，简称GIS(Gas Insulated Substation)，是目前变电站建设的核心设备，其具有结构紧凑、占地面积小、抗干扰能力强、运行过程中维护量小等特点，在全国电网广泛使用，目前已在110kV、220kV、330kV、500kV、750kV以及1000kV的各电压等级广泛使用。Gas-insulated metal-enclosed switchgear, referred to as GIS (Gas Insulated Substation), is the core equipment in the current substation construction. It has the characteristics of compact structure, small footprint, strong anti-interference ability, and small maintenance during operation. Widely used, it has been widely used in various voltage levels of 110kV, 220kV, 330kV, 500kV, 750kV and 1000kV.
随着使用规模的不断扩大、研究方向的不断扩展，近年来GIS设备电气绝缘技术日趋完善，国内厂家引进吸收、因地制宜的进行了大量自主创新、改造，但对GIS设备长管线结构在不同自然环境中安全运行的研究相对缺乏，导致设备在设计、制造、安装等环节没有有效考虑大温差、强紫外线等的环境特点，管线结构运行过程中无法有效吸收金属材料由于温度变化而引起的应力变形问题，致使设备常常出现地基拉裂、筒体拉裂、盆式绝缘子开裂、构架变形、极端天气法兰面漏气等问题，给设备的安全稳定运行带来困难。With the continuous expansion of the scale of use and the continuous expansion of the research direction, the electrical insulation technology of GIS equipment has become more and more perfect in recent years. Domestic manufacturers have introduced and absorbed a lot of independent innovation and transformation according to local conditions. However, the long pipeline structure of GIS equipment is in different natural environments. There is a relatively lack of research on safe operation in the middle of the pipeline, resulting in the equipment not effectively considering the environmental characteristics such as large temperature difference and strong ultraviolet rays in the design, manufacture, installation and other links, and the pipeline structure cannot effectively absorb the stress and deformation caused by the temperature change during the operation of the pipeline structure. As a result, the equipment often has problems such as foundation cracking, cylinder cracking, basin insulator cracking, frame deformation, and air leakage on the flange surface in extreme weather, which brings difficulties to the safe and stable operation of the equipment.
近年来，国家电网公司系统内连续发生数十起GIS设备因环境温度变化引发的故障和事件，故障调查发现，GIS设备发生了位移变化，但GIS设备出厂本身没有配置记录位移变化量的部件，有部分设备只是安装一个能滑动的直尺，用来记录位移变化量，但这种简单的机械尺具既不具有记忆功能也不能发出位移变化越限的告警信号供运行人员处理。再者，GIS设备随环境温度变化不断发生拉伸或压缩形变，固定机械尺具要想发挥作用就需要人员在现场不断记录，并且观测能力要求较高，毫米级的变化量对观测人员也是一种繁重的负担，记录工作量也非常大。而观测得到具体的位移变化量是GIS设备故障调查、分析的重要依据，但是目前尚无有效的方法。In recent years, dozens of GIS equipment failures and incidents caused by changes in ambient temperature have occurred in the State Grid Corporation of China system. The fault investigation found that the GIS equipment has undergone displacement changes, but the GIS equipment itself is not equipped with components to record the displacement changes. Some equipments only install a sliding ruler to record the displacement change, but this simple mechanical ruler neither has a memory function nor can send out an alarm signal that the displacement change exceeds the limit for the operator to deal with. In addition, GIS equipment continuously undergoes tensile or compressive deformation with changes in ambient temperature. If the fixed mechanical ruler is to function, it needs to be continuously recorded by personnel on the spot, and the observation ability is required to be high. The change in millimeters is also a problem for the observers. It is a heavy burden, and the recording workload is also very large. The specific displacement change obtained by observation is an important basis for the investigation and analysis of GIS equipment failures, but there is no effective method at present.
有限元数值模拟技术是提升产品质量、缩短设计周期、提高产品竞争力的一项有效手段，所以，随着计算机技术和计算方法的发展，有限元法在工程设计和科研领域得到了越来越广泛的重视和应用，已经成为解决复杂工程分析计算问题的有效途径，从汽车到航天飞机几乎所有的设计制造都已离不开有限元分析计算，其在机械制造、材料加工、航空航天、汽车、土木建筑、电子电器、国防军工、船舶、铁道、石化、能源和科学研究等各个领域的广泛使用已使设计水平发生了质的飞跃。在电力行业中，有限元数值模拟技术主要用于各结构零件的强度校核、绝缘子静电场及电压分布、电缆及带电设备的温度分布、电磁感应产生能量损耗等。Finite element numerical simulation technology is an effective means to improve product quality, shorten design cycle and improve product competitiveness. Therefore, with the development of computer technology and calculation methods, finite element method has been increasingly used in engineering design and scientific research. Extensive attention and application have become an effective way to solve complex engineering analysis and calculation problems. Almost all design and manufacturing from automobiles to space shuttles are inseparable from finite element analysis and calculation. , civil construction, electronic appliances, national defense and military industry, ships, railways, petrochemicals, energy and scientific research and other fields have made a qualitative leap in the design level. In the power industry, the finite element numerical simulation technology is mainly used for the strength check of various structural parts, the electrostatic field and voltage distribution of insulators, the temperature distribution of cables and live equipment, and the energy loss caused by electromagnetic induction.
在有限元分析计算中，GIS设备管线结构温差应力变形属于热应力分析，热应力分析属于耦合场分析，耦合场分析是指考虑了两个或多个工程物理场之间相互作用的分析。耦合场的分析方法大致分为两类，即直接耦合和顺序耦合。热应力分析是一个典型的顺序耦合的例子，传热过程和应力过程解析可以分别进行，先进行热分析，将热分析得到的温度场模拟结果作为热载荷施加到随后的结构应力分析中去，从而简化了热应力耦合求解问题，减少了耦合分析所需的大量计算时间。In the finite element analysis and calculation, the temperature difference stress deformation of the GIS equipment pipeline structure belongs to the thermal stress analysis, and the thermal stress analysis belongs to the coupled field analysis. The coupled field analysis refers to the analysis that considers the interaction between two or more engineering physical fields. The analysis methods of coupled fields are roughly divided into two categories, namely direct coupling and sequential coupling. Thermal stress analysis is a typical example of sequential coupling. The heat transfer process and stress process analysis can be carried out separately. The thermal analysis is performed first, and the simulation results of the temperature field obtained by the thermal analysis are applied to the subsequent structural stress analysis as thermal loads. This simplifies the thermal stress coupled solution problem and reduces the large amount of computational time required for coupled analysis.
发明内容SUMMARY OF THE INVENTION
本发明的目的是克服现有技术的缺陷，提供一种精度高、实时性好、能记录所有位移变化情况又能根据需要发出告警信号的GIS设备在线监测方法，有助于提高GIS设备运行和故障调查效率。The purpose of the present invention is to overcome the defects of the prior art, and to provide an on-line monitoring method for GIS equipment with high precision, good real-time performance, capable of recording all displacement changes and sending alarm signals as needed, which is helpful to improve the operation and performance of GIS equipment. Failure investigation efficiency.
为实现上述目的，本发明采用的技术方案为：To achieve the above object, the technical scheme adopted in the present invention is:
一种GIS设备管线结构温差应力变形在线监测方法，该方法包含以下步骤：A GIS equipment pipeline structure temperature difference stress deformation online monitoring method, the method comprises the following steps:
S101，建立GIS管线结构三维几何模型；S102，材料属性赋予、网格划分；S103，确定边界条件；S104，热应力分析；S105，应力结果、位移结果查看；S106，实时监控、安全评估。S101, establish a three-dimensional geometric model of the GIS pipeline structure; S102, assign material properties and mesh; S103, determine boundary conditions; S104, analyze thermal stress; S105, view stress results and displacement results; S106, real-time monitoring and safety assessment.
进一步的，所述的S101步骤中GIS管线结构包括但不限于母线筒体、滑动支撑、固定支撑、波纹管补偿器、绝缘盆子、螺栓和螺母。Further, the GIS pipeline structure in the step S101 includes but is not limited to a busbar barrel, a sliding support, a fixed support, a bellows compensator, an insulating basin, a bolt and a nut.
进一步的，所述的S101步骤中三维几何模型的建立方法包括但不限于：直接利用有限元分析软件的前处理器自带的建模工具建立模型，划分网格；在CAD或UG或Solidworks软件中创建实体模型，然后通过数据接口读入，修正后划分网格建立有限元模型；通过直接创建节点和单元模型的特征建模；MASS或Workbench或ICEM软件中创建模型，再将节点和单元数据读入有限元分析软件。Further, the method for establishing the three-dimensional geometric model in the step S101 includes, but is not limited to: directly using the modeling tool that comes with the preprocessor of the finite element analysis software to establish a model and divide the mesh; in CAD or UG or Solidworks software Create a solid model in the software, then read it in through the data interface, and divide the mesh to build a finite element model after correction; create a feature model by directly creating node and element models; create a model in MASS or Workbench or ICEM software, and then convert the node and element data. Read into finite element analysis software.
进一步的，所述的S102步骤中材料属性包括但不限于材料的比热容、线膨胀系数、导热系数、密度、弹性模量、泊松比、屈服强度；GIS设备管线结构筒体采用六面体网格的方式进行划分，壳体模型计算过程中采用四边形网格进行划分。Further, in the described step S102, the material properties include but are not limited to the specific heat capacity, linear expansion coefficient, thermal conductivity, density, elastic modulus, Poisson's ratio, and yield strength of the material; GIS equipment pipeline structure cylinder adopts hexahedral grid. In the calculation process of the shell model, quadrilateral meshes are used for division.
进一步的，所述的S103步骤中的边界条件为GIS设备管线的实时温度，设定固定支撑处为固定约束条件，设定滑动支撑处为滑动方向自由度释放，其他自由度约束，设定罐体内压为固定约束条件。Further, the boundary condition in the described step S103 is the real-time temperature of the GIS equipment pipeline, the fixed support is set as the fixed constraint condition, the sliding support is set as the release of the degree of freedom in the sliding direction, the other degrees of freedom are constrained, and the tank is set. Internal pressure is a fixed constraint.
进一步的，所述的S104热应力分析包括：S401通过热物性参数、网格划分和热载荷计算三维几何模型的温度场；S402转换单元、力学参数和力学载荷结合S401所得温度场作为温度载荷计算应力场。Further, the S104 thermal stress analysis includes: S401 calculating the temperature field of the three-dimensional geometric model through thermal physical parameters, grid division and thermal load; S402 converting the unit, mechanical parameters and mechanical load combined with the temperature field obtained in S401 as the temperature load calculation Stress field.
进一步的，所述的S105步骤中应力结果与GIS管线结构的母线筒体的最大等效应力值对比；位移结果与GIS管线结构温度补偿单元的收缩范围对比。Further, the stress result in the step S105 is compared with the maximum equivalent stress value of the busbar barrel of the GIS pipeline structure; the displacement result is compared with the shrinkage range of the temperature compensation unit of the GIS pipeline structure.
进一步的，所述的S106步骤中评估方法为：若得到的等效应力值大于GIS设备管线结构材料的屈服强度，则GIS设备管线结构产生塑性变形，GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行；若得到的位移变形值大于GIS设备管线结构温度补偿单元的收缩值，则GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行。Further, the evaluation method in the step S106 is: if the obtained equivalent stress value is greater than the yield strength of the GIS equipment pipeline structure material, then the GIS equipment pipeline structure produces plastic deformation, the GIS equipment pipeline structure is prone to cracking, and there is a potential safety hazard. On the contrary, the GIS equipment pipeline structure operates safely; if the obtained displacement deformation value is greater than the shrinkage value of the temperature compensation unit of the GIS equipment pipeline structure, the GIS equipment pipeline structure is prone to cracking, and there is a potential safety hazard. On the contrary, the GIS equipment pipeline structure operates safely.
进一步的，所述的S103步骤中边界条件为GIS设备管线的实时温度，所述的温度由在线式红外测温仪测得。Further, the boundary condition in the step S103 is the real-time temperature of the GIS equipment pipeline, and the temperature is measured by an online infrared thermometer.
本发明专利利用有限元仿真技术对GIS设备管线进行温度应力变形在线监测。利用温度传感器或者红外测温仪对GIS设备管线结构进行温度实时测量，并将数据通过无线传输至云端，将温度数据输入有限元分析软件中，通过热应力分析得到GIS设备管线结构的实时位移数据，使运维人员对GIS设备管线结构进行实时监控及安全评估，保证设备安全稳定运行。本发明测量实时温度数据采用非接触红外测温仪，并将温度数据储存及上传以便于进行后续分析。The patent of the invention uses the finite element simulation technology to monitor the temperature, stress and deformation of the GIS equipment pipeline on-line. Use temperature sensors or infrared thermometers to measure the temperature of the GIS equipment pipeline structure in real time, transmit the data to the cloud wirelessly, input the temperature data into the finite element analysis software, and obtain the real-time displacement data of the GIS equipment pipeline structure through thermal stress analysis. , so that the operation and maintenance personnel can conduct real-time monitoring and safety assessment of the GIS equipment pipeline structure to ensure the safe and stable operation of the equipment. The present invention uses a non-contact infrared thermometer to measure real-time temperature data, and stores and uploads the temperature data for subsequent analysis.
本发明利用有限元仿真技术对GIS设备管线进行温度应力变形的在线监测，通过将温度数据作为边界条件输入软件中，进行热应力分析，得到应力及位移变形数据，从而达到在线监测的目的。有限元分析模型表现为实体模型，其实质是以数学的方法构造和表达几何外形，是网格节点和单元的载体，本身不参与有限元分析。可以通过以下几种途径建立模型：(1)直接利用有限元分析软件的前处理器自带的建模工具建立模型，划分网格；(2)在专用CAD软件(如UG、Solidworks)中创建实体模型，然后通过数据接口读入，修正后划分网格建立有限元模型；(3)特征建模(直接创建节点和单元模型)；(4)在其他专用CAE软件(如MASS、Workbench、ICEM)中创建模型，再将节点和单元数据读入有限元分析软件。在第一步骤中建立好的有限元模型上施加载荷后进入求解器求解。并可以在查看计算结果最后进行耦合场分析。The invention uses the finite element simulation technology to monitor the temperature stress deformation on-line of the GIS equipment pipeline. By inputting the temperature data into the software as the boundary condition, the thermal stress analysis is performed to obtain the stress and displacement deformation data, so as to achieve the purpose of on-line monitoring. The finite element analysis model is represented as a solid model, and its essence is to construct and express the geometric shape by mathematical methods. It is the carrier of grid nodes and elements, and does not participate in the finite element analysis itself. The model can be established in the following ways: (1) Directly use the modeling tool that comes with the preprocessor of the finite element analysis software to establish the model and divide the mesh; (2) Create it in special CAD software (such as UG, Solidworks) The solid model is then read in through the data interface, and the mesh is divided to establish a finite element model after correction; (3) feature modeling (directly create node and element models); (4) in other special CAE software (such as MASS, Workbench, ICEM) ) and then read the node and element data into finite element analysis software. After applying load on the finite element model established in the first step, enter the solver to solve. And the coupled field analysis can be performed at the end of viewing the calculation results.
根据有限元分析得到的等效应力及位移变形结果，可以判断出GIS设备管线结构是否安全运行。若得到的等效应力值大于GIS设备管线结构材料的屈服强度，则GIS设备管线结构产生塑性变形，GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行；若得到的位移变形值大于GIS设备管线结构温度补偿单元的收缩值，则GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行。According to the equivalent stress and displacement deformation results obtained by finite element analysis, it can be judged whether the GIS equipment pipeline structure is operating safely. If the obtained equivalent stress value is greater than the yield strength of the GIS equipment pipeline structure material, the GIS equipment pipeline structure will be plastically deformed, the GIS equipment pipeline structure will be prone to cracking, and there will be potential safety hazards. On the contrary, the GIS equipment pipeline structure will operate safely; If the deformation value is greater than the shrinkage value of the temperature compensation unit of the GIS equipment pipeline structure, the GIS equipment pipeline structure is prone to cracking, and there is a potential safety hazard. On the contrary, the GIS equipment pipeline structure operates safely.
本发明提供一种用于GIS设备管线结构温差应力变形在线监测方法，采用非接触红外测温仪，并将温度数据储存及上传后进行后续分析，红外测温仪可以全天候在线监测GIS设备管线的实时温度，且测量结果准确，可以解决人工监测方式成本大，测量精度差的问题。The invention provides an online monitoring method for temperature difference stress deformation of GIS equipment pipeline structure. A non-contact infrared thermometer is used, and the temperature data is stored and uploaded for subsequent analysis. Real-time temperature and accurate measurement results can solve the problems of high cost and poor measurement accuracy of manual monitoring methods.
本发明提供一种用于GIS设备管线结构温差应力变形在线监测方法，通过建立GIS管线结构三维几何模型，材料属性赋予、网格划分，确定边界条件，热应力分析，应力结果、位移结果查看而实现实时监控和安全评估，方法简单有效。The invention provides an on-line monitoring method for temperature difference stress deformation of GIS equipment pipeline structure. Real-time monitoring and security assessment are realized in a simple and effective way.
本发明提供一种用于GIS设备管线结构温差应力变形在线监测方法，可以根据GIS设备管线实际参数调整模型参数和其他参数，从而实现多种GIS设备管线结构温差应力变形在线监测，应用范围广。The invention provides an on-line monitoring method for temperature difference stress deformation of GIS equipment pipeline structure, which can adjust model parameters and other parameters according to the actual parameters of GIS equipment pipeline structure, so as to realize on-line monitoring of temperature difference stress deformation of various GIS equipment pipeline structures, and has wide application range.
本发明提供一种用于GIS设备管线结构温差应力变形在线监测方法，同时对GIS设备管线结构进行安全风险评估，保证设备安全稳定运行，大大减少人力和物力，具有重大的社会效益和经济效益。The invention provides an on-line monitoring method for temperature difference stress deformation of GIS equipment pipeline structure, and simultaneously conducts safety risk assessment on GIS equipment pipeline structure, ensures safe and stable operation of equipment, greatly reduces manpower and material resources, and has significant social and economic benefits.
与现有技术相比，本发明提供的用于GIS设备管线结构温差应力变形在线监测方法的优点：Compared with the prior art, the advantages of the on-line monitoring method for GIS equipment pipeline structure temperature difference stress deformation provided by the present invention:
(1)本发明的方法简单有效。(1) The method of the present invention is simple and effective.
(2)可以解决人工监测方式成本大，测量精度差的问题。(2) It can solve the problems of high cost and poor measurement accuracy of manual monitoring methods.
(3)模型参数可以灵活调整，应用范围广。(3) The model parameters can be adjusted flexibly and have a wide range of applications.
(4)可以对GIS设备管线结构进行安全风险评估，保证设备安全稳定运行。(4) The safety risk assessment of the pipeline structure of GIS equipment can be carried out to ensure the safe and stable operation of the equipment.
附图说明Description of drawings
图1是本发明技术路线图。Figure 1 is a technical roadmap of the present invention.
图2是本发明热应力分析的计算流程图。Fig. 2 is the calculation flow chart of the thermal stress analysis of the present invention.
图3是本发明红外测温仪测量GIS设备管线示意图。3 is a schematic diagram of the pipeline of the infrared thermometer measuring GIS equipment of the present invention.
图4是本发明建立的GIS设备管线结构的三维模型。FIG. 4 is a three-dimensional model of the GIS equipment pipeline structure established by the present invention.
图5是本发明模型计算过程中GIS设备网格划分模型。Fig. 5 is a grid division model of GIS equipment in the model calculation process of the present invention.
图6是本发明施加边界条件的GIS设备模型。FIG. 6 is a GIS equipment model for applying boundary conditions according to the present invention.
图7是本发明GIS管线结构在70℃下的等效应力示意图。FIG. 7 is a schematic diagram of the equivalent stress of the GIS pipeline structure of the present invention at 70°C.
图8是本发明GIS管线结构在70℃下的位移变形情况示意图。Fig. 8 is a schematic diagram of the displacement and deformation of the GIS pipeline structure of the present invention at 70°C.
具体实施方式Detailed ways
为使本领域的技术人员更好地理解本发明的技术方案，以下实施例对本发明的作进一步详细描述，以下实施例仅用于说明发明，但不用来限制本发明的范围。In order to make those skilled in the art better understand the technical solution of the present invention, the following examples will further describe the present invention in detail, and the following examples are only used to illustrate the invention, but are not used to limit the scope of the invention.
一种GIS设备管线结构温差应力变形在线监测方法，该方法包含以下步骤：A GIS equipment pipeline structure temperature difference stress deformation online monitoring method, the method comprises the following steps:
S101，建立GIS管线结构三维几何模型；S102，材料属性赋予、网格划分；S103，确定边界条件；S104，热应力分析；S105，应力结果、位移结果查看；S106，实时监控、安全评估。S101, establish a three-dimensional geometric model of the GIS pipeline structure; S102, assign material properties and mesh; S103, determine boundary conditions; S104, analyze thermal stress; S105, view stress results and displacement results; S106, real-time monitoring and safety assessment.
进一步的，所述的S101步骤中GIS管线结构包括但不限于母线筒体、滑动支撑、固定支撑、波纹管补偿器、绝缘盆子、螺栓和螺母。Further, the GIS pipeline structure in the step S101 includes but is not limited to a busbar barrel, a sliding support, a fixed support, a bellows compensator, an insulating basin, a bolt and a nut.
进一步的，所述的S101步骤中三维几何模型的建立方法包括但不限于：直接利用有限元分析软件的前处理器自带的建模工具建立模型，划分网格；在CAD或UG或Solidworks软件中创建实体模型，然后通过数据接口读入，修正后划分网格建立有限元模型；通过直接创建节点和单元模型的特征建模；MASS或Workbench或ICEM软件中创建模型，再将节点和单元数据读入有限元分析软件。Further, the method for establishing the three-dimensional geometric model in the step S101 includes, but is not limited to: directly using the modeling tool that comes with the preprocessor of the finite element analysis software to establish a model and divide the mesh; in CAD or UG or Solidworks software Create a solid model in the software, then read it in through the data interface, and divide the mesh to build a finite element model after correction; create a feature model by directly creating node and element models; create a model in MASS or Workbench or ICEM software, and then convert the node and element data. Read into finite element analysis software.
进一步的，所述的S102步骤中材料属性包括但不限于材料的比热容、线膨胀系数、导热系数、密度、弹性模量、泊松比、屈服强度；GIS设备管线结构筒体采用六面体网格的方式进行划分，壳体模型计算过程中采用四边形网格进行划分。Further, in the described step S102, the material properties include but are not limited to the specific heat capacity, linear expansion coefficient, thermal conductivity, density, elastic modulus, Poisson's ratio, and yield strength of the material; GIS equipment pipeline structure cylinder adopts hexahedral grid. In the calculation process of the shell model, quadrilateral meshes are used for division.
进一步的，所述的S103步骤中的边界条件为GIS设备管线的实时温度，设定固定支撑处为固定约束条件，设定滑动支撑处为滑动方向自由度释放，其他自由度约束，设定罐体内压为固定约束条件。Further, the boundary condition in the described step S103 is the real-time temperature of the GIS equipment pipeline, the fixed support is set as the fixed constraint condition, the sliding support is set as the release of the degree of freedom in the sliding direction, the other degrees of freedom are constrained, and the tank is set. Internal pressure is a fixed constraint.
进一步的，所述的S104热应力分析包括：S401通过热物性参数、网格划分和热载荷计算三维几何模型的温度场；S402转换单元、力学参数和力学载荷结合S401所得温度场作为温度载荷计算应力场。Further, the S104 thermal stress analysis includes: S401 calculating the temperature field of the three-dimensional geometric model through thermal physical parameters, grid division and thermal load; S402 converting the unit, mechanical parameters and mechanical load combined with the temperature field obtained in S401 as the temperature load calculation Stress field.
进一步的，所述的S105步骤中应力结果与GIS管线结构的母线筒体的最大等效应力值对比；位移结果与GIS管线结构温度补偿单元的收缩范围对比。Further, the stress result in the step S105 is compared with the maximum equivalent stress value of the busbar barrel of the GIS pipeline structure; the displacement result is compared with the shrinkage range of the temperature compensation unit of the GIS pipeline structure.
进一步的，所述的S106步骤中评估方法为：若得到的等效应力值大于GIS设备管线结构材料的屈服强度，则GIS设备管线结构产生塑性变形，GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行；若得到的位移变形值大于GIS设备管线结构温度补偿单元的收缩值，则GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行。Further, the evaluation method in the step S106 is: if the obtained equivalent stress value is greater than the yield strength of the GIS equipment pipeline structure material, then the GIS equipment pipeline structure produces plastic deformation, the GIS equipment pipeline structure is prone to cracking, and there is a potential safety hazard. On the contrary, the GIS equipment pipeline structure operates safely; if the obtained displacement deformation value is greater than the shrinkage value of the temperature compensation unit of the GIS equipment pipeline structure, the GIS equipment pipeline structure is prone to cracking, and there is a potential safety hazard. On the contrary, the GIS equipment pipeline structure operates safely.
进一步的，所述的S103步骤中边界条件为GIS设备管线的实时温度，所述的温度由在线式红外测温仪测得。Further, the boundary condition in the step S103 is the real-time temperature of the GIS equipment pipeline, and the temperature is measured by an online infrared thermometer.
实施例1Example 1
结合图1～3所示，一种GIS设备管线结构温差应力变形在线监测方法，该方法包含以下步骤：With reference to Figures 1 to 3, an online monitoring method for temperature difference stress deformation of GIS equipment pipeline structure, the method includes the following steps:
S101，建立GIS管线结构三维几何模型；S101, establish a three-dimensional geometric model of the GIS pipeline structure;
GIS管线结构包括母线筒体、滑动支撑、固定支撑、波纹管补偿器、绝缘盆子、螺栓和螺母。GIS pipeline structure includes busbar barrel, sliding support, fixed support, bellows compensator, insulating basin, bolts and nuts.
三维几何模型的建立方法为直接利用有限元分析软件的前处理器自带的建模工具建立模型，划分网格。The establishment method of the 3D geometric model is to directly use the modeling tool of the preprocessor of the finite element analysis software to establish the model and divide the mesh.
S102，材料属性赋予、网格划分；S102, assigning material properties, meshing;
材料属性包括材料的比热容、线膨胀系数、导热系数、密度、弹性模量、泊松比、屈服强度；GIS设备管线结构筒体采用六面体网格的方式进行划分，壳体模型计算过程中采用四边形网格进行划分。Material properties include material specific heat capacity, linear expansion coefficient, thermal conductivity, density, elastic modulus, Poisson's ratio, yield strength; GIS equipment pipeline structure cylinder is divided by hexahedral mesh, and quadrilateral is used in the calculation process of shell model. Grid is divided.
S103，确定边界条件；S103, determine boundary conditions;
边界条件为GIS设备管线的实时温度，设定固定支撑处为固定约束条件，设定滑动支撑处为滑动方向自由度释放，其他自由度约束，设定罐体内压为固定约束条件。温度由在线式红外测温仪测得。The boundary condition is the real-time temperature of the GIS equipment pipeline, the fixed support is set as the fixed constraint, the sliding support is set as the release of the degree of freedom in the sliding direction, and the other degrees of freedom are constrained, and the internal pressure of the tank is set as the fixed constraint. The temperature is measured by an on-line infrared thermometer.
S104，热应力分析；S104, thermal stress analysis;
热应力分析包括：S401通过热物性参数、网格划分和热载荷计算三维几何模型的温度场；S402转换单元、力学参数和力学载荷结合S401所得温度场作为温度载荷计算应力场。The thermal stress analysis includes: S401 calculates the temperature field of the three-dimensional geometric model through thermal physical parameters, mesh division and thermal load; S402 converts the unit, mechanical parameters and mechanical load combined with the temperature field obtained in S401 as the temperature load to calculate the stress field.
S105，应力结果、位移结果查看；S105, check the stress results and displacement results;
应力结果与GIS管线结构的母线筒体的最大等效应力值对比；位移结果与GIS管线结构温度补偿单元的收缩范围对比。The stress results are compared with the maximum equivalent stress value of the busbar barrel of the GIS pipeline structure; the displacement results are compared with the shrinkage range of the temperature compensation unit of the GIS pipeline structure.
S106，实时监控、安全评估。S106, real-time monitoring and security assessment.
评估方法为：若得到的等效应力值大于GIS设备管线结构材料的屈服强度，则GIS设备管线结构产生塑性变形，GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行；若得到的位移变形值大于GIS设备管线结构温度补偿单元的收缩值，则GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行。The evaluation method is as follows: if the obtained equivalent stress value is greater than the yield strength of the GIS equipment pipeline structure material, the GIS equipment pipeline structure will undergo plastic deformation, the GIS equipment pipeline structure is prone to cracking, and there are potential safety hazards, otherwise the GIS equipment pipeline structure will operate safely; If the obtained displacement deformation value is greater than the shrinkage value of the temperature compensation unit of the GIS equipment pipeline structure, the GIS equipment pipeline structure is prone to cracking, and there is a potential safety hazard. On the contrary, the GIS equipment pipeline structure operates safely.
实施例2Example 2
结合图1～3所示，一种GIS设备管线结构温差应力变形在线监测方法，该方法包含以下步骤：With reference to Figures 1 to 3, an online monitoring method for temperature difference stress deformation of GIS equipment pipeline structure, the method includes the following steps:
S101，建立GIS管线结构三维几何模型；S101, establish a three-dimensional geometric model of the GIS pipeline structure;
GIS管线结构包括母线筒体、滑动支撑、固定支撑、波纹管补偿器、绝缘盆子、螺栓和螺母。三维几何模型的建立方法为Workbench软件中创建模型，再将节点和单元数据读入有限元分析软件。GIS pipeline structure includes busbar barrel, sliding support, fixed support, bellows compensator, insulating basin, bolts and nuts. The establishment method of the 3D geometric model is to create the model in the Workbench software, and then read the node and element data into the finite element analysis software.
S102，材料属性赋予、网格划分；S102, assigning material properties, meshing;
材料属性包括材料的比热容、线膨胀系数、导热系数、密度、弹性模量、泊松比、屈服强度；GIS设备管线结构筒体采用六面体网格的方式进行划分，壳体模型计算过程中采用四边形网格进行划分。Material properties include material specific heat capacity, linear expansion coefficient, thermal conductivity, density, elastic modulus, Poisson's ratio, yield strength; GIS equipment pipeline structure cylinder is divided by hexahedral mesh, and quadrilateral is used in the calculation process of shell model. Grid is divided.
S103，确定边界条件；S103, determine boundary conditions;
边界条件为GIS设备管线的实时温度，设定固定支撑处为固定约束条件，设定滑动支撑处为滑动方向自由度释放，其他自由度约束，同时加入重力的影响，设定罐体内压为固定约束条件。所述的温度由在线式红外测温仪测得。The boundary condition is the real-time temperature of the GIS equipment pipeline, the fixed support is set as the fixed constraint, the sliding support is set as the release of the degree of freedom in the sliding direction, the other degrees of freedom are constrained, and the influence of gravity is added at the same time, and the internal pressure of the tank is set as fixed Restrictions. The temperature is measured by an on-line infrared thermometer.
S104，热应力分析；S104, thermal stress analysis;
热应力分析包括：S401通过热物性参数、网格划分和热载荷计算三维几何模型的温度场；S402转换单元、力学参数和力学载荷结合S401所得温度场作为温度载荷计算应力场。The thermal stress analysis includes: S401 calculates the temperature field of the three-dimensional geometric model through thermal physical parameters, mesh division and thermal load; S402 converts the unit, mechanical parameters and mechanical load combined with the temperature field obtained in S401 as the temperature load to calculate the stress field.
S105，应力结果、位移结果查看；S105, check the stress results and displacement results;
应力结果与GIS管线结构的母线筒体的最大等效应力值对比；位移结果与GIS管线结构温度补偿单元的收缩范围对比。The stress results are compared with the maximum equivalent stress value of the busbar barrel of the GIS pipeline structure; the displacement results are compared with the shrinkage range of the temperature compensation unit of the GIS pipeline structure.
S106，实时监控、安全评估。S106, real-time monitoring and security assessment.
评估方法为：若得到的等效应力值大于GIS设备管线结构材料的屈服强度，则GIS设备管线结构产生塑性变形，GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行；若得到的位移变形值大于GIS设备管线结构温度补偿单元的收缩值，则GIS设备管线结构容易产生开裂，存在安全隐患，反之GIS设备管线结构安全运行。The evaluation method is as follows: if the obtained equivalent stress value is greater than the yield strength of the GIS equipment pipeline structure material, the GIS equipment pipeline structure will undergo plastic deformation, the GIS equipment pipeline structure is prone to cracking, and there are potential safety hazards, otherwise the GIS equipment pipeline structure will operate safely; If the obtained displacement deformation value is greater than the shrinkage value of the temperature compensation unit of the GIS equipment pipeline structure, the GIS equipment pipeline structure is prone to cracking, and there is a potential safety hazard. On the contrary, the GIS equipment pipeline structure operates safely.
实施例3Example 3
结合图1～8所示，本实施方式测量GIS设备管线结构的实时温度采用在线式红外测温仪，使用时，将在线式红外测温仪固定于GIS设备管线结构的正前方，并固定，如图3所示，从而可以测量GIS设备管线结构实时温度。温度数据储存及传输是将数据通过SD卡进行本地存储，然后利用数传电台进行数据传输。1 to 8, in this embodiment, an online infrared thermometer is used to measure the real-time temperature of the GIS equipment pipeline structure. When in use, the online infrared thermometer is fixed directly in front of the GIS equipment pipeline structure and fixed. As shown in Figure 3, the real-time temperature of the GIS equipment pipeline structure can be measured. Temperature data storage and transmission is to store the data locally through the SD card, and then use the digital radio for data transmission.
以某750kV变电站GIS设备管线结构为例，首先根据现场实测GIS设备管线结构的几何尺寸，利用三维实体建模软件建立GIS设备管线结构的三维模型，如图4所示。整体模型中特征模型主要包括母线筒体，滑动支撑，固定支撑，波纹管补偿器，绝缘盆子，螺栓螺母等几何特征，考虑到后期的有限元计算需要对模型进行简化，因此在GIS设备管线结构模型建立的过程中将一些几何特征进行合理简化。Taking the GIS equipment pipeline structure of a 750kV substation as an example, firstly, according to the geometric dimensions of the GIS equipment pipeline structure measured on site, the 3D model of the GIS equipment pipeline structure is established by using 3D solid modeling software, as shown in Figure 4. The feature model in the overall model mainly includes geometric features such as busbar barrel, sliding support, fixed support, bellows compensator, insulating basin, bolt and nut, etc. Considering that the model needs to be simplified in the later finite element calculation, the pipeline structure of GIS equipment Some geometric features are reasonably simplified in the process of model establishment.
根据GIS设备管线结构筒体的几何特征以及有限元分析特点，对其进行有限元模型的建立。为了保证整体有限元计算的精度，实体模型计算过程中，采用六面体网格的方式进行划分，壳体模型计算过程中采用四边形网格进行划分。如图5所示。According to the geometric characteristics of the GIS equipment pipeline structure cylinder and the characteristics of finite element analysis, the finite element model is established. In order to ensure the accuracy of the overall finite element calculation, the hexahedral mesh is used to divide the solid model, and the quadrilateral mesh is used to divide the shell model. As shown in Figure 5.
将红外测温仪测量的温度数据，作为边界条件，本实施方式以红外测温仪测量GIS管线结构筒体的温度为70℃为例，设定固定支撑处为固定约束条件；设定滑动支撑处为滑动方向自由度释放，其他自由度约束；设定罐体内压为0.4Mpa；同时考虑重力的作用，具体边界条件施加如图6所示。The temperature data measured by the infrared thermometer is used as the boundary condition. In this embodiment, the temperature of the GIS pipeline structure cylinder measured by the infrared thermometer is 70°C as an example, and the fixed support is set as the fixed constraint condition; the sliding support is set as the fixed constraint condition. The degree of freedom in the sliding direction is released, and the other degrees of freedom are constrained; the internal pressure of the tank is set to 0.4Mpa; at the same time, the effect of gravity is considered, and the specific boundary conditions are applied as shown in Figure 6.
通过上述边界条件的设置和计算分析可以得到GIS管线结构在70℃下的等效应力及位移变形情况，如图7、8所示。从图中可以看出，GIS管线结构的母线筒体的最大等效应力值为161.13MPa，小于筒体材料的屈服强度，未发生塑性变形；GIS管线结构的母线筒体的最大位移值为15.775mm，小于GIS管线结构温度补偿单元的收缩范围，未发生开裂。Through the setting and calculation analysis of the above boundary conditions, the equivalent stress and displacement deformation of the GIS pipeline structure at 70 °C can be obtained, as shown in Figures 7 and 8. It can be seen from the figure that the maximum equivalent stress value of the busbar barrel of the GIS pipeline structure is 161.13MPa, which is less than the yield strength of the barrel material, and no plastic deformation occurs; the maximum displacement value of the busbar barrel of the GIS pipeline structure is 15.775 mm, less than the shrinkage range of the temperature compensation unit of the GIS pipeline structure, and no cracking occurred.
以上详细描述了本发明的优选实施方式，但是，本发明并不限于上述实施方式中的具体细节，在本发明的技术构思范围内，可以对本发明的技术方案进行多种变换，这些简单变型均属于本发明的保护范围。The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present invention, various changes can be made to the technical solutions of the present invention, and these simple changes are all It belongs to the protection scope of the present invention.
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征和步骤，在不矛盾的情况下，可以通过任何合适的方式进行组合，为了避免不必要的重复，本发明对各种可能的组合方式不再另行说明。In addition, it should be noted that the specific technical features and steps described in the above-mentioned specific embodiments can be combined in any suitable manner unless they are inconsistent. The possible combinations are not specified otherwise.
此外，本发明的各种不同的实施方式之间也可以进行任意组合，只要其不违背本发明的思想，其同样应当视为本发明所公开的内容。In addition, the various embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the contents disclosed in the present invention.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111783259A (en) * | 2020-07-31 | 2020-10-16 | 徐州巴特工程机械股份有限公司 | Safety assessment method for bucket structure |
| CN112097725A (en) * | 2020-08-01 | 2020-12-18 | 国网辽宁省电力有限公司电力科学研究院 | A method for checking and adjusting temperature compensation expansion joints for outdoor GIS bus |
| CN113051803A (en) * | 2021-04-16 | 2021-06-29 | 哈尔滨理工大学 | Method for detecting resistance of cable core in production process |
| CN113076670A (en) * | 2021-03-26 | 2021-07-06 | 贵州航天电子科技有限公司 | Multi-physical-field coupled phased array guidance micro-system collaborative optimization method |
| CN113420479A (en) * | 2021-06-22 | 2021-09-21 | 辽宁东科电力有限公司 | GIS pipeline compensation corrugated pipe monitoring and evaluating method |
| CN116127660A (en) * | 2022-11-18 | 2023-05-16 | 武汉市缔佳源建筑劳务有限公司 | Intelligent pipe network intelligent integrated management platform based on GIS |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105488292A (en) * | 2015-12-14 | 2016-04-13 | 中广核工程有限公司 | Method and system for evaluating structural performance of high-temperature valve based on valve simulation model |
| CN108052697A (en) * | 2017-11-18 | 2018-05-18 | 西安交通大学 | A kind of corridor pipe GIL three-dimensional temperature fields and breathing deformation calculation method based on workbench |
| CN109376487A (en) * | 2018-12-04 | 2019-02-22 | 国网青海省电力公司电力科学研究院 | A Calculation Method for Temperature Difference Deformation of GIS Long Busbar Structure in High Altitude Areas |
-
2019
- 2019-11-28 CN CN201911191119.0A patent/CN110781630A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105488292A (en) * | 2015-12-14 | 2016-04-13 | 中广核工程有限公司 | Method and system for evaluating structural performance of high-temperature valve based on valve simulation model |
| CN108052697A (en) * | 2017-11-18 | 2018-05-18 | 西安交通大学 | A kind of corridor pipe GIL three-dimensional temperature fields and breathing deformation calculation method based on workbench |
| CN109376487A (en) * | 2018-12-04 | 2019-02-22 | 国网青海省电力公司电力科学研究院 | A Calculation Method for Temperature Difference Deformation of GIS Long Busbar Structure in High Altitude Areas |
Non-Patent Citations (2)
| Title |
|---|
| 刘春梅 等: "GIS长母线基于温度场的应力仿真浅析", 《科技视界》, 25 June 2019 (2019-06-25), pages 1 - 3 * |
| 张晶 等: "220 kV GIS 设备局部结构有限元分析", 《山东电力技术》, 25 September 2015 (2015-09-25), pages 1 - 3 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111783259A (en) * | 2020-07-31 | 2020-10-16 | 徐州巴特工程机械股份有限公司 | Safety assessment method for bucket structure |
| CN111783259B (en) * | 2020-07-31 | 2024-03-29 | 徐州巴特工程机械股份有限公司 | Safety assessment method for bucket structure |
| CN112097725A (en) * | 2020-08-01 | 2020-12-18 | 国网辽宁省电力有限公司电力科学研究院 | A method for checking and adjusting temperature compensation expansion joints for outdoor GIS bus |
| CN112097725B (en) * | 2020-08-01 | 2022-05-10 | 国网辽宁省电力有限公司电力科学研究院 | A method for checking and adjusting temperature compensation expansion joints for outdoor GIS bus |
| CN113076670A (en) * | 2021-03-26 | 2021-07-06 | 贵州航天电子科技有限公司 | Multi-physical-field coupled phased array guidance micro-system collaborative optimization method |
| CN113076670B (en) * | 2021-03-26 | 2022-10-18 | 贵州航天电子科技有限公司 | A Cooperative Optimization Method for Phased Array Guidance Microsystems Coupled with Multiphysics Fields |
| CN113051803A (en) * | 2021-04-16 | 2021-06-29 | 哈尔滨理工大学 | Method for detecting resistance of cable core in production process |
| CN113420479A (en) * | 2021-06-22 | 2021-09-21 | 辽宁东科电力有限公司 | GIS pipeline compensation corrugated pipe monitoring and evaluating method |
| CN116127660A (en) * | 2022-11-18 | 2023-05-16 | 武汉市缔佳源建筑劳务有限公司 | Intelligent pipe network intelligent integrated management platform based on GIS |
| CN116127660B (en) * | 2022-11-18 | 2023-12-15 | 智城数创(西安)科技有限公司 | Intelligent pipe network intelligent integrated management platform based on GIS |
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