基于参数灵敏度的综合能源系统安全控制策略研究

Security Control Strategy for Integrated Energy System Using Parameter Sensitivity

该文基于电–气综合能源系统(integratedenergy system,IES)子系统间的参数灵敏度矩阵,探究IES变量间的交互耦合机理,提出一种IES静态安全控制策略。首先,构建电–气耦合的IES模型,并采用Newton-Raphson法求解IES多能流方程;在此基础上,利用多能流计算过程中的雅可比矩阵信息及变量间的耦合关系,计算IES中电压、气压、支路潮流、管道流量对控制变量燃气轮机出力、压缩机出口压力的参数灵敏度矩阵,定量描述电、气互联系统间交互耦合机理;然后,提出一种IES静态安全控制策略,在保证系统负荷供应的前提下,对IES越限元件基于参数灵敏度矩阵计算压缩机出口压力及燃气轮机出力的控制量,进而调整控制元件的运行状态使其满足IES安全运行要求;最后,通过IES 4-12算例对所提方法进行分析、验证,结果验证了所提方法的正确性和有效性。

In this paper,a parameter sensitivity matrix between the electricity network and natural gas network in integrated energy system(IES)was calculated to explore the interaction mechanism between the IES variables,and a static security control strategy for the IES was further proposed to improve the IES security.An electricity-gas integrated energy system model was firstly constructed,and then the multi-energy flow of IES was solved by Newton-Raphson method.Based on the obtained Jacobian matrix in the multi-energy flow calculation process,the parameter sensitivity matrix of voltage,air pressure,branch current,pipeline flow to control variables such as gas turbine output and compressor outlet pressure was calculated,and then the interaction mechanism between the electricity network and natural gas network was quantitatively revealed.Further,a static security control strategy for IES based on the revealed interaction mechanism was developed to regulate the gas compressor outlet pressure and the gas turbine output to satisfy the IES secure operation requirement if some components of IES violate their security constraints.The performance of the proposed method was evaluated by IES 4-12 test system.The results demonstrate that the proposed approach can reveal the interaction mechanism between electricity network and natural gas network in the IES and improve the static security of IES.