基于独立运行的海上平台天然气主机控制系统的提升改造

Improvement and Transformation of Offshore Platform Natural Gas Host Control System Based on Independent Operation

当前设有电站的海上平台间均采用电力组网的运行模式,由一套电网能量管理系统对组网发电机进行功率管理。文章针对独立运行的天然气主机由于其控制系统缺少调速、调压接口而无法接受电网能量管理系统的控制,导致天然气主机并入电网后仅能在自带的基载模式下恒功率运行,其带载值只能通过人为设定的方式进行调整,从而提出对天然气主机控制系统的提升改造,使其能够接受电网能量管理系统的调频、调压,同时创新性提出利用工艺系统燃气压力值控制天然气主机的自动加卸载方案,通过增加控制卡件、通讯卡件使其与电网能量管理系统建立通讯。天然气主机控制系统提升改造投用后,解决机组不受电网能量管理系统控制的难题,同时实现根据燃气系统压力值、按照比例设定值实时调控燃气主机的加卸载值,实现稳定燃气系统压力的同时减少火炬放空量,节能降碳效果非常显著。

Currently,platforms with power stations on the sea adopt a power grid operation mode,and a set of grid energy management system manage the power of the grid generators.This article focuses on the independent operation of natural gas hosts,which are unable to accept the control of the power grid energy management system due to the lack of speed regulation and voltage regulation interfaces in their control system.As a result,natural gas hosts can only operate at constant power in their own base load mode after being integrated into the power grid,and their load values can only be adjusted manually.Therefore,this paper proposes the improvement and transformation of the natural gas host control system to enable it to accept the frequency regulation and voltage regulation of the power grid energy management system.At the same time,this paper innovatively proposes an automatic loading and unloading scheme using the gas pressure value of the process system to control the natural gas host.By adding control cards and communication cards to establish communication with the power grid energy management system,the natural gas host control system has been upgraded and put into use,solving the stubborn problem of the unit not being controlled by the power grid energy management system.At the same time,the gas host’s loading and unloading values can be adjusted according to the pressure value of the gas system and set proportionally in real time,achieving stable gas system pressure while reducing the amount of flare venting,achieving significant energy-saving and carbon reduction effects.