Transient state safety and stability emergency control method considering intelligent controllable device

Abstract

The invention discloses a transient state safety and stability emergency control method considering an intelligent controllable device, belonging to the electric power system safety and stability control field. According to the invention, the main station of a safety and stability control system is provided with control sensitivity information of an intelligent controllable device; when the safety and stability control system is detected to break down, the method can calculate the comprehensive control effect which the intelligent controllable device actively participates in adjusting through the dynamic adjusting capacity difference sent by the intelligent controllable device before and after a fault, and accordingly correct an off line control strategy; after the control strategy is executed, and a time-delay determination system can not recover to a reasonable level, additional control measures are executed imminently.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a transient safety and stability emergency control method considering intelligent controllable equipment. Background technique [0002] At present, the interconnection of regional power grids, UHV AC and DC, and long-distance large-capacity power transmission have basically taken shape. my country's power grid has become the world's largest power grid with the highest voltage level and the highest degree of complexity. Distributed power generation, large-scale new energy access, the rise of microgrids, and the commissioning of multiple large-capacity DC transmission systems have greatly increased the degree of nonlinearity of the system. With the rapid development of power electronics technology, the application of intelligent controllable equipment such as phase shifter (IPC), large-capacity high-voltage DC, controll...

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Problems solved by technology

[0005] However, the current intelligent controllable equipment, especially TCSC, SVC and STATCOM, mainly rely on cross-sectional power or voltage level information collected locally or in the near area, and act according to the established strategy, without considering the interaction between intelligent controllable equipment. interaction with traditional machine-cutting and load-shedding control measures; moreover, in the actual system operation, intelligent controllable equipment also responds to frequent small disturbance events in the power grid, resulting in its dynamically adjustable response to severe faults. Capacity is often less than design capacity

The current off-line simulation analysis is still difficult to truly simulate this situation, resulting in the section limit of the off-line control strategy table being too conservative without considering the intelligent controllable equipment, and the emergency control measures are heavy; while considering the full capacity of the intelligent controllable equipment can be used During the transient process, the section limit is too optimistic and the emergency control measures are insufficient

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