Ge Xianjun

Framework design of cloud computing technology application in power system transient simulation

In order to solve the power system transient simulation problem, which is caused by the contradiction between efficiency and accuracy due to insufficient calculation ability, this paper proposes a Cloud Computing technology application framework for power system transient simulation. Firstly, it expounds the characteristics and current situation of power system transient simulation, and points out the problems in its further development. Secondly, this paper introduces current research status of the cloud computing technology, and discusses the application of infrastructure as a service (IaaS), platform as a service (PaaS) and system as a service (SaaS) in power system transient simulation. Thirdly, it constructs the overall structure, software architecture and application mode of the power system transient simulation based on cloud computing technology. This paper can provide a reference for the cloud computing application in power system transient simulation.

A Big Data analysis based new method for power grid dispatch and control training simulation

With the construction of Global Energy Internet, power system has the trend of the scale expansion, the network complexity, the equipment precision and data massivication. Substation automation and power grid equipment level are continuously improved as well, but the traditional power grid dispatcher training simulation system (DTS) has been unable to adapt to the increasingly precise secondary electric equipment simulation requirements. A Big Data analysis based new method for power grid dispatch and control training simulation first uses ETL tool to extract and standardization process the data of secondary equipment and signals they emit. Then do the equipment type association rules mining to equipment and signal data after preprocessing, and correlation matching in accordance with association rules. At last, classified equipment data will be divided and load according to the condition of area, substation, bay and voltage grade, and drive the equipment detailed simulation logic. The method based on the actual operation monitoring data, uses semantic analysis and association rule technology and ETL and ElasticSearch tools to implement the grid primary and secondary equipment signal extraction, parsing, mining and load, so that operation monitoring equipment detailed simulation logic can be driven and the authenticity, accuracy, adaptability and precision of simulation can be improved.

A CEP based ETL method of active distribution network operation monitoring and controlling signal data

With the development of Active Distribution Network, the scale of power system becomes larger and larger, and the number of electrical equipment in distribution network increases sharply and becomes further precise, electrical equipments operation monitoring and controlling signal data has the characters of massive, diversity and complication, shows a trend of Big Data. Massive and random operation monitoring and controlling signal data causes various applications in active distribution network unable to extract useful information quickly and efficiently so as difficult to form decision support. Complex event processing (CEP) is an intelligent data processing technology rise in the era of Big Data, which can implement rapid analysis and processing to continuous data based on rule engine. The article uses CEP engine as the operation monitoring and controlling signal processing core, and uses ETL (Extract-Transform-Load) framework to integrate, clean and load the distributed, disordered and standard not unified signal data in active distribution network into the data warehouse. The problem of data format not unified and independent storage during data extraction can be solved by using the adapter mode and daemon process way. Based on CEP engine, it determines the core processing architecture of operation monitoring and controlling signal big data. In the architecture, signal cleaning rule library and algorithm library use the pluggable mode which makes them easy to maintain and expand. Rules library can be determined by using nested query, combined operation and pattern matching, and algorithm library can be packaged of memory partitioning and multithread processing, word-frequency statistics, keyword recognition and elimination, and other algorithms. It uses buffer queue to cache processing result and format the output as needed. The CEP engine based Big Data ETL solution implements the fast, accurate and effective standardization processing of operation monitoring and controlling signal and provides accurate data preparation for fast simulation, fault analysis, state estimation and other important application in active distribution network.