A remote data collection and communication method for EMS system of offshore oilfield group power grid

Abstract

The invention relates to an offshore oilfield group power grid energy management system (EMS) remote data acquisition communication method. The method includes the following steps: remote data acquisition of an EMS system is carried out through integrated protection devices of high and medium voltage switch cabinets of all transformer substations of an offshore oilfield group; acquired remote measuring and remote signaling data is transmitted into an intelligent substation system by all the integrated protection devices, and when 'incidents' of remote measuring out-of-limit and remote signaling deflection occur, all the integrated protection devices transmit changed remote measuring and remote signaling data to the intelligent substation system immediately; otherwise, all the integrated protection devices transmit the remote measuring and remote signaling data to the intelligent substation system at regular time according to a preset time period; the intelligent substation system analyzes all the received remote measuring and remote signaling data, and judges whether the 'incidents' of the remote measuring out-of-limit and the remote signaling deflection occur, and if the 'incidents' of the remote measuring out-of-limit and the remote signaling deflection occur, the intelligent substation system transmits the remote measuring and remote signaling data to the offshore oilfield group EMS through a remote control channel; and otherwise, the intelligent substation system transmits the remote measuring and remote signaling data to the offshore oilfield group EMS at regular time through the remote control channel according to the preset time period.

Description

technical field [0001] The invention relates to a remote data collection and communication method for an EMS system, in particular to a remote data collection and communication method for an EMS system of an offshore oil field group power grid. Background technique [0002] In the past, the power supply mode of offshore oil and gas fields was generally to set up a power station on the central platform of the oil and gas field or FPSO (floating oil storage ship), and then supply power to the wellhead platform through submarine cables. The power systems of each oil and gas field are independent of each other, each forming a micro-grid with power generation, transmission, distribution and load. Such a power system has small capacity and small reserve capacity, and there are problems such as poor power supply reliability, poor impact resistance performance, and difficulty in starting large-scale equipment. In order to ensure the reliability of power supply, oil and gas fields n...

AI Technical Summary

Problems solved by technology

However, since the external communication of comprehensive insurance adopts RS485 bus and MODBUS communication protocol, it is a "master-slave circular polling" communication mechanism

like figure 1 As shown, since the "master-slave circular polling" communication mechanism is adopted, the real-time performance of sending telemetry and telematics data depends on the query time interval and communication rate. The real-time transmission cannot meet the requirements of stable control functions such as emergency unloading of EMS, which makes the SCADA system still need to retain certain traditional RTU and hard-wired telemetry and telesignaling of the main loop to meet the real-time requirements; telemetry data of other loops It requires the EMS system to perform a certain estimation process, which affects the performance of the EMS system to a certain extent, and cannot meet the requirements of other advanced application functions in the EMS system that have higher real-time and accuracy requirements for remote signaling and telemetry.

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