CAJ | 학술논문

核电机组(nuclear power plant，NPP)具有单机容量大、核安全要求高等特性，失磁故障会影响核电机组安全性。为研究核电机组失磁时的机网协调控制策略，建立了大型压水堆核电机组的发电机模型、汽轮机及其控制系统模型、反应堆堆芯控制系统模型、励磁系统模型及失磁故障数学模型，研究了核电机组在不同功率水平运行时的失磁动态响应特性及机理。结果表明：满载失磁对反应堆及热力系统冲击大，核电机组应可靠跳闸；低功率运行失磁时，核电机组可以短期内维持并网异步运行；核电机组发生失磁导致厂用电的可靠性和供电质量下降，应该采取相应措施提高厂用电的可靠性。
핵전궤조(nuclear power plant，NPP)구유단궤용량대、핵안전요구고등특성，실자고장회영향핵전궤조안전성。위연구핵전궤조실자시적궤망협조공제책략，건립료대형압수퇴핵전궤조적발전궤모형、기륜궤급기공제계통모형、반응퇴퇴심공제계통모형、려자계통모형급실자고장수학모형，연구료핵전궤조재불동공솔수평운행시적실자동태향응특성급궤리。결과표명：만재실자대반응퇴급열력계통충격대，핵전궤조응가고도갑；저공솔운행실자시，핵전궤조가이단기내유지병망이보운행；핵전궤조발생실자도치엄용전적가고성화공전질량하강，응해채취상응조시제고엄용전적가고성。
A nuclear power plant (NPP) has the characteristics of large capacity and demanding requirements of nuclear security, while the loss of excitation (LOE) affects its security. To study the coordinated control strategy of NPP with LOE faults, the generator model, the model of the turbine speed control system, the reactor core control system model, the excitation system model, and the loss of excitation fault model of the large pressurized water reactor (PWR) nuclear power plant were constructed. The dynamic response characteristics and mechanism of the NPP with the LOE fault at different power levels were studied. The results show that:loss of excitation with full load has great impact on the reactor and thermal system, the NPP should trip reliably;In case of the LOE at a low power level, the NPP can operate asynchronously connected with grid in a short period;The LOE may result in the decline of NPP’s auxiliary power quality and reliability and it is necessary to take measures to improve the reliability of the auxiliary power of NPP.