China Science and Technology Institute passed a acceptance test
The project “Research on the whole process of prevention and control and emergency recovery strategy for large blackouts†led by China Electric Power Research Institute passed the acceptance of the Ministry of Science and Technology of the State Grid Corporation. The results of the project can effectively improve the emergency prevention and control and rapid recovery capability of the power grid, and have practical operability and good promotion and application value.
In the complex scenario of AC/DC hybrid, multi-FACTS access and large-scale new energy grid connection in China's power grid, it is urgent to carry out the mechanism of large blackouts, emergency control of power outages, equipment safety during power grid recovery after power failure, system security and stability, etc. In-depth research on aspects.
Through the whole process research of mechanism analysis, emergency control and recovery control of large blackouts, this paper proposes a large blackout fault set construction technology combining the coupling branch and the whole process dynamic simulation to realize the long-term dynamic process simulation of large blackouts. Simulation; for the traditional power system state division indicators are mainly qualitative judgments, lack of quantitative guidance, and propose a transition evaluation index based on the entropy threshold for the grid from normal state to the alert state; for the existing grid security assessment and early warning system In the actual operation and fault response of the power grid, the data processing and time lag problems existed. The three lines of defense configuration and function settings of the grid online protection and monitoring were innovated, and the new generation grid security monitoring system scheme and control structure were constructed. / Low-frequency load shedding / high-frequency cutting machine and low-voltage load shedding configuration principle and scheme under the condition of isolated network, optimized selection method of starting path in super/UHV grid recovery process, frequency stability in power grid reconstruction and recovery process And voltage stability risk point, power system based on two-level remediation strategy
The research results of the project have enriched the three-line defense strategy system for power systems in response to the blackout, providing strong technical support for effectively blocking the occurrence of blackouts.
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