基于综合能源系统N-1静态安全评估的燃气轮机接入规划策略

Gas Turbine Access Planning Strategy Based on N-1 Static Safety Assessment for Integrated Energy System

气电综合能源系统的耦合日益紧密,相互影响也愈加强烈。天然气系统故障影响燃气机组燃料供应,影响电力系统稳定运行。燃气轮机在天然气系统中接入点的确定对于保障其燃料供应具有重要作用。对天然气系统的潮流计算进行建模,设立管道N-1静态安全分析预想事故集,以天然气系统运行成本最小化为目标,对开断前后的天然气系统潮流进行仿真。建立天然气管道支路N-1开断事故量化评估指标,评估关键支路和重要节点。通过对评估指标进行排序,确定天然气系统的关键管道支路和重要节点,提出燃气轮机接入规划策略,确定燃气轮机在天然气系统中的接入点。通过所建立的规划策略,可为电力系统中的燃气机组在天然气系统中可靠接入提供整套方案参考。

The coupling of electricity and natural gas systems is increasingly close,and the mutual influence is more and more intense.The failure of natural gas system affects the fuel supply to gas units and the stable operation of the power system.The determination of access points of gas turbines in natural gas systems plays an important role in securing their fuel supply.The gas flow calculation of the natural gas system is modeled,and N-1 static safety analysis predication accident set of pipeline is set up.The gas flow of natural gas system before and after breaking is simulated with the goal of minimizing the operating cost of natural gas system.Quantitative evaluation indexes of accident after the break-down of the natural gas N-1 pipeline branch are established to evaluate key branches and important nodes.By ranking the evaluation indicators,the key pipeline branches and important nodes of the natural gas system are determined,the gas turbine access planning strategy is proposed,and the access point of the gas turbine in the natural gas system is determined.The established planning strategy can provide a complete set of scheme references for reliable access of gas units in the power system to the natural gas system.