It belongs to the key technology for large-scale power grid dispatching in the field of "power systems and their automation technologies."
In-depth research was carried out in response to various challenges faced by power grid operation, such as the frequent occurrence of extreme weather, the development of UHV AC and DC hybrid power grids, large-scale access of new energy and the impact of big data on informatization decision-making of dispatch centers. A series of results have been achieved: (1) In terms of "panoramic situation awareness", the concept of panoramic situation awareness in dispatching operation is proposed to evaluate the safety status and predict the safety trend of specific power grid dispatching systems, so that corresponding measures can be taken in advance to eliminate safety hazards and ensure the safety of power grid dispatching;(2) In terms of "adaptive coordinated control", through the coordination and linkage of the two-level dispatch of the grid and provincial levels, the use of comprehensive intelligent alarm, online security assessment, multi-objective and multi-area automatic power generation control, network-provincial coordinated automatic voltage control, dynamic area deviation control, A series of advanced control methods such as remote emergency support for pumping and storage power stations, and integrated power dispatching are used to achieve self-adaptation to power grid disturbances;(3) In terms of "closed-loop evaluation and analysis", closed-loop evaluation is realized and the level of dispatch personnel decision-making and control is improved through analytical tools such as AC and DC real-time simulation platform, computing unified data management platform, protection online verification and risk management system, and fault diagnosis and 3D accident playback system.
Technological innovation and characteristics: 1. A four-dimensional and three-level first-class dispatch indicator system is designed, and key dispatch operation indicators such as reactive power control deviation indicator, power flow evaluation indicator, and multi-dimensional voltage deviation indicator are proposed. On this basis, the operating status of the first-class dispatch power grid is realized. Panoramic situational awareness;2. Created a dispatch operation encyclopedia, which realizes a knowledge base for the accumulation and sharing of dispatch knowledge and experience; 3. Guided the dispatch and operation of the power grid with the concept of adaptive coordinated control, a distributed coordinated control method for voltage at the two levels of unmanned substation and provincial levels was proposed for the first time, and coordinated emergency support control of each pumped storage power station in the power grid in large power shortage areas was realized for the first time; 4. For the first time, a multi-power supply short-term coordinated peak shaving method for grid-provincial two-level dispatch is proposed, and a water-fire-pump-storage joint peak shaving model is established. Associated search, heuristic search and load reconfiguration strategies are used to solve the grid-provincial coordination model. The problem of peak shaving of power grids in multiple provinces and cities is solved;5. An automatic splicing method for regional power grid operation methods is proposed for the first time, realizing unified process management of regional power grid dispatching basic equipment, network source parameters, and operation methods; 6. A relay protection fault diagnosis and analysis method based on the maximum likelihood method is proposed, and a 5D accident reproduction platform including geographical information, plant and station, protection, recorder, and accident report is established for the first time;7. The AC and DC real-time simulation platform for the East China UHV Power Grid provides a new analysis tool for dispatch and operation.
Promotion and application status: This project has had important impacts and demonstration effects in the directions of "panoramic situation awareness","adaptive coordinated control" and "closed-loop evaluation and analysis." In terms of "panoramic situation awareness", the regulation and control sub-center has constructed a set of indicator systems to quantitatively depict the operating status of the power grid, and built a dispatch encyclopedia platform that helps understand and precipitate hidden knowledge, realizing visual applications; in terms of "adaptive coordinated control", the regulation and control sub-center has carried out a number of technical research and system construction, and has achieved multi-level, cross-regional, and long-distance coordinated control of the power grid around the results of panoramic situation awareness; In terms of "closed-loop evaluation and analysis", the regulation and control sub-centers have concentrated their efforts to continuously strengthen the power grid evaluation and analysis infrastructure, and carried out special evaluation work to meet the urgent needs of large power grid operation to closed-loop improve the level of power grid regulation.
This project has applied for 10 invention patents, published 30 papers, obtained 5 software copyright registration certificates, and won the first prize in Science and Technology Progress Award of the East China Branch of State Grid in 2013.
Expert acceptance opinions believe that: "Research and Application of First-class Dispatch Key Technologies Based on Panoramic Situation Awareness and Adaptive Coordination Control" project has a complete content system, correct technical route, and overall research results achieved by the project have reached the international leading level.