A voltage safety early warning and prevention and control system based on multiple information sources

Abstract

The invention provides a voltage security pre-warning, prevention and control system based on multiple information sources. The voltage security pre-warning, prevention and control system comprises a human-computer interface subsystem, a system managing and maintaining subsystem, a data communication subsystem, a dynamic data processing subsystem, an online parallel computing subsystem, an online voltage security evaluation subsystem and an online prevention and control subsystem. With the adoption of the voltage security pre-warning, prevention and control system based on the multiple information sources, the online application of a whole process dynamic simulation tool is realized; the time scale of anticipated accidents and the simulated analysis depth are expanded through combination of quiescent voltage stability analysis and transient voltage stability analysis, and in consideration of responding-based voltage stability analysis; pre-warning is given to the possibly occuring problem of voltage instability according to a whole process evaluation result of the online voltage security; and rapid and effective preventive control measures or optimizing strategies are given to an operation mode that the stability margin of the voltage security is in shortage, so that preventive control and emergency control of the online voltage stability are realized, and the power outage caused by breakdown of the network voltage is avoided.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a voltage safety early warning and prevention and control system based on multiple information sources. Background technique [0002] Since the late 1970s, there have been many large voltage collapse accidents in the world. The voltage instability accidents in the actual power grid are mostly characterized by different forms of instability, including rapid transient voltage instability accidents and As the load slowly increases, it appears as an accident of static voltage instability, but the process of more voltage instability accidents is more complicated, often accompanied by the expansion of cascading faults in the accident disturbance process, coupled with unreasonable adjustment measures taken artificially, Ultimately, it manifests as a collapsed accident characterized by voltage instability. Therefore, the prevention and control of voltage stability shou...

AI Technical Summary

Problems solved by technology

[0002] Since the late 1970s, there have been many large voltage collapse accidents in the world. The voltage instability accidents in the actual power grid are mostly characterized by different forms of instability, including rapid transient voltage instability accidents and With the slow increase of load, it appears as an accident of static voltage instability, but the process of more voltage instability accidents is more complicated, often accompanied by the expansion of cascading faults in the process of accident disturbance, coupled with unreasonable adjustment measures taken artificially, A crash accident characterized by voltage instability

Static voltage stability analysis has a relatively mature analysis method. At present, online control analysis has been realized, and there are a large number of application cases at home and abroad; transient voltage instability belongs to the category of dynamic security control of dispatching automation system. It is difficult to distinguish between voltage instability and transient power angle instability, so in the advanced application function of dynamic safety assessment, transient voltage instability accidents are not clearly distinguished; as mentioned earlier, most voltage collapse processes experience a The process of accident chain disturbance and human intervention has been going on for a long time. It is generally believed that the occurrence, development and preventive measures of voltage collapse accidents need to be studied by means of whole-process simulation. However, there are few mature full-process dynamic simulation tools that are truly commercialized in the world. , even if it is feasible in terms of algorithm and program implementation, from the planning scheme demonstration in the planning stage to the calculation of the normal operation mode, the whole process dynamic simulation tool is generally not used as a simulation method. The main obstacle to its application lies in the medium and long-term slow Modeling of Action Elements

Images