| Power system situation visualization is an important auxiliary tool to ensure the stable operation of power grid.It provides information support for power grid operation decisionmaking through data visualization methods.With the massive access of wind power,photovoltaic and other distributed power supplies and power electronic devices,the changes in system operation characteristics have intensified,the system power flow has become more complex,and broadband oscillation,power flow transfer and other phenomena occur frequently,which greatly improves the real-time requirements of power grid operation decisions.In order to meet the real-time demand of decision-making,it is necessary to further improve the information transmission efficiency of power system situation visualization.At present,the information transmission efficiency of power system situation visualization is restricted by two factors.On the one hand,due to the limitations of rendering technology and data sampling frequency,traditional power system situation visualization software lacks the dynamic visualization of power grid security situation,which makes it difficult to support the panoramic perception and global analysis of massive multi-source power grid operation information;On the other hand,power system situation visualization software is usually implemented based on browser/server(B/S)architecture,which has a serious rendering performance bottleneck,leading to its inability to achieve smooth and continuous visual effects when processing millisecond level high-frequency refresh data,making it difficult for decision users to form effective dynamic visual understanding.To solve the above problems,this paper focuses on visual representation design,data highperformance rendering,human-computer interaction design,etc.,as follows:(1)In the aspect of visual representation design,this paper proposes a multi-scale dynamic representation method of power grid security situation.The visual models of safety situation scenarios such as power angle oscillation and cascading failures are established,and the visualization algorithms involved in the visualization models are studied.Finally,the proposed visualization scheme is realized by programming.The simulation results show that the proposed visualization scheme can intuitively and effectively reveal the system problems in the security situation scenario,and provide effective information support for the regulation and operation business.(2)In the aspect of high performance rendering of data,this paper proposes a multi layer parallel rendering method suitable for power systems.In terms of layer data distribution,a multi layer data distribution mechanism has been established.By opening up the data channel between the main thread and the sub thread at the physical level,and establishing a multi branch data link between data and layers at the logical level,the efficient flow of data in a multi thread and multi layer environment has been ensured.In terms of data analysis,a Canvas graphics analysis method based on CIM/G is proposed,which realizes the high-performance rendering of Canvas in the power scene,and provides support for the millisecond level low delay rendering of power system situation visualization.The simulation results show that the proposed method effectively improves the performance of power system situation visualization,and can meet the real-time requirements of power system operation decision-making for visualization information.(3)In the aspect of human-computer interaction design,this paper proposes a set of power system situation visualization platform based on multi screen coupling and linkage is developed combining the research contents of(1)and(2).First,the data management requirements of the visualization platform for multi screen coupling and linkage technology are analyzed.Secondly,according to this requirement,a visual software organization method based on ontology is proposed,which provides a feasible design paradigm for the organization of data elements of the visual platform.Finally,based on the proposed software organization method,the data link and software architecture of the visualization platform are designed,and on this basis,the development,testing and deployment of the visualization platform are realized.The simulation results show that the functions of the proposed visualization platform operate stably,which can help dispatchers monitor the same task with a multi screen view,achieve data information diversion,and improve the work efficiency of dispatchers. |
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