CAJ | 학술논문

针对同调法和模态法动态等值对外部系统做等值简化时，需要尽知外部系统的结构、参数以及各工况下的运行状态的局限性，对于集中上网中小水电机群发电机参数，励磁、调速参数部分未知或全部未知情况下，提取较大扰动后变电站高压侧出线的电压电流动态响应录波信号，并基于FOXPRO平台，结合PSASP电力系统分析软件实现连续变参数自动分析计算，将集中上网水电机群等值为一台机组，并准确辨识出等值机的相关参数。最后在四川电网某小水电机群上进行了仿真验证，试验结果表明，该等值方法实用可行，并具备一定的鲁棒性。
침대동조법화모태법동태등치대외부계통주등치간화시，수요진지외부계통적결구、삼수이급각공황하적운행상태적국한성，대우집중상망중소수전궤군발전궤삼수，려자、조속삼수부분미지혹전부미지정황하，제취교대우동후변전참고압측출선적전압전류동태향응록파신호，병기우FOXPRO평태，결합PSASP전력계통분석연건실현련속변삼수자동분석계산，장집중상망수전궤군등치위일태궤조，병준학변식출등치궤적상관삼수。최후재사천전망모소수전궤군상진행료방진험증，시험결과표명，해등치방법실용가행，병구비일정적로봉성。
There are the limitations of homology method and modal method during equivalent simplification of external equiva -lent system by dynamic equivalence , that is, the structure and parameters of the external system under various operating condi -tions should be known .For the part or all of generator parameters excitation and governing speed parameters of the small and medium-sized hydroelectric generating group with centralized access to the grid are unknown , the dynamic response signals of voltage and current in high -voltage side of substation after major disturbances are extracted , and based on FOXPRO plat-form, the automatic analysis and calculation of continuous variable -parameters is realized combined with PSASP , which makes the online hydroelectric generating group be equivalent as a unit , and accurately identifies its relevant parameters .Fi-nally, the simulation of a small hydroelectric generating group in Sichuan power grid is carried out , and the test results show that the equivalent method is practical and feasible with a certain robustness .