油田井场源网荷储协调优化控制策略研究  

Research on Coordinated Optimization Control Strategy for Power Generation,Transmission,Loading,and Storage System in Oilfield Wellsite

作　　者：邹兵[1] 逄格震 刘成民 仉志华[2] Zou Bing;Pang Gezhen;Liu Chengmin

机构地区：[1]胜利油田分公司,山东东营257001 [2]中国石油大学(华东)新能源学院,山东青岛266580

出　　处：《上海电气技术》2024年第4期6-12,31,共8页Journal of Shanghai Electric Technology

摘　　要：直流微电网由于具有可控性强、系统损耗小、不需要考虑无功问题等优点,逐渐成为油田井场微电网应用的热点。分布式电源的大量接入及井场负荷运行特点带来的直流母线电压波动是制约油田井场直流微电网发展的瓶颈问题。基于油田井场共直流母线供电系统结构,开展分布式电源、交流电网、抽油机负荷、电储能装置协调控制策略研究,提出结合光伏最大功率点跟踪策略、抽油机负荷柔性控制策略、基于母线电压下垂法的储能与电网协调控制策略的源网荷储协调优化控制策略。参考直流母线电压、电池荷电状态、负荷运行水平、分布式电源出力情况,实时调整电网、储能的充放电策略和抽油机负荷的运行情况,维持直流母线电压稳定在一定范围内,在满足油田井场电负荷需求的前提下促进新能源消纳。在MATLAB/Simulink软件中搭建仿真模型,验证控制策略的有效性。结合小干扰稳定分析,根据系统特征值分布结果验证系统的小干扰稳定性。DC microgrid,known for its strong controllability,low system loss,and elimination of reactive power concern,has become increasingly popular for oilfield wellsite application.However,the voltage fluctuation of the DC bus,arising from the large-scale integration of distributed power source and the specific operational characteristic of wellsite load,presents a significant challenge to the development of DC microgrid in oilfield wellsite.The research on coordinated control strategy for distributed power source,AC grid,pumpjack load,and energy storage device was carried out based on shared DC bus power supply system structure of oilfield wellsite.A coordinated optimization control strategy was proposed for the power generation,transmission,loading,and storage system,which integrates maximum power point tracking for photovoltaic system,adaptive control strategy for pumpjack load,and bus voltage droop-based coordination control strategy for energy storage and grid.By considering DC bus voltage,battery state of charge,load operation level,and distributed power output,the charging and discharging strategies of grid and energy storage were adjusted in real time,as well as the operation of pumpjack load,to maintain the DC bus voltage within a stable range.The strategy promotes the consumption of new energy while meeting the electrical load demand of oilfield wellsite.The simulation model was established in MATLAB/Simulink software to verify the effectiveness of the control strategy.Additionally,the small-signal stability of system was verified based on the eigenvalue distribution result of system,in combination with small-signal stability analysis.

关 键 词：油田 井场 电力系统 控制 研究 

分 类 号：TM732[电气工程—电力系统及自动化]