CAJ | 학술논문

汽轮机阀门流量特性是影响电力系统稳定性的重要因素,通过建立电网汽轮机及其调速系统、发电机、励磁系统的数学模型,研究了汽轮机调节阀门流量特性对电网安全稳定性的影响机制。数学分析和仿真结果表明,当汽轮机阀门流量特性不佳时,会引起原动机有功功率的周期性波动。针对此现象,提出了调整后的汽轮机调速系统控制策略,该策略能够抑制功率控制方式下的比例—积分—微分控制器的过度调节,有效增加系统阻尼,抑制原动机的功率波动。
기륜궤벌문류량특성시영향전력계통은정성적중요인소,통과건립전망기륜궤급기조속계통、발전궤、려자계통적수학모형,연구료기륜궤조절벌문류량특성대전망안전은정성적영향궤제。수학분석화방진결과표명,당기륜궤벌문류량특성불가시,회인기원동궤유공공솔적주기성파동。침대차현상,제출료조정후적기륜궤조속계통공제책략,해책략능구억제공솔공제방식하적비례—적분—미분공제기적과도조절,유효증가계통조니,억제원동궤적공솔파동。
Steam turbine valve discharge characteristics are among the important factors affecting the stability of the power systems.The influence mechanism of steam turbine valve discharge characteristics on the security and stability of the power grid is studied through the mathematical modeling of steam turbine and its speed control system,generator and excitation system.Mathematical analysis and simulation results show that cyclic fluctuations of generator active power might be caused by undesired steam turbine valve discharge characteristics.In view of this phenomenon,a modified control strategy of turbine governor modification system is proposed.This strategy can inhibit the excessive accommodation of proportion-integration-differentiation（PID） controller which is based on the power control mode,effectively increases the system damping,and suppresses power fluctuations of the prime mover.