On-line pre-deciding method for offshore oilfield group power grid emergency control

Abstract

The invention relates to an on-line pre-deciding method for offshore oilfield group power grid emergency control. The method includes the following steps: an energy management system (EMS) operates normally, monitors an actual power grid in real time, acquires current operation parameter information of the system periodically according to preset time intervals, and provides grid parameters to an emergency control system; state estimation is carried out according to the current operation parameters of the system, current operation mode parameters are acquired, the current operation mode parameters comprise values of all state variables, whether refreshing of the operation parameters exists is judged, and if the refreshing exists, a control strategy table of the emergency control system is generated; whether disturbance and fault of the system occur is detected in real time, if the disturbance and the fault of the system do not occur, the system continues to operate normally, and the process is returned to the first step; if the fault occurs, then types of the disturbance and the fault are judged, and a next step continues to be carried out; matched control strategies are searched in the control strategy table; the emergency control strategies are executed, and operating states of the system are detected in real time; and when the system returns to stable operation through transient processes, emergency control is finished, and the process is returned to the first step. The on-line pre-deciding method for the offshore oilfield group power grid emergency control can be widely applied to the fields of offshore oil and gas field production and power grid control.

Description

technical field [0001] The invention relates to an online decision-making method for power grid emergency control, in particular to an online pre-decision-making method for emergency control of power grids of offshore oil field groups in the field of offshore oil and gas field production and power grid control. Background technique [0002] Offshore oilfield group power grid is an independent micro-grid system scattered on the ocean, consisting of distributed power generation, platform substations / loads, submarine cables, etc. It is an important infrastructure for offshore oil and gas exploitation. Sex and efficiency play an important role. Emergency control refers to a series of control measures used to prevent system stability from being damaged or develop into a worse situation when the system is disturbed and enters an emergency or extreme emergency state, and to avoid serious power outages. It is an important link to ensure system safety and stability. . The pre-decis...

AI Technical Summary

Problems solved by technology

Since it is necessary to list all emergency control strategies CASE offline, it is possible to make a correct judgment after a system failure occurs, which brings disadvantages such as large data size and mismatch in the strategy table, and with the increase of the complexity of the power grid, It will become more and more difficult to build all CASEs to meet the requirements of system security and stability

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