CAJ | 학술논문

目前计算配电网最大供电能力(TSC)的模型法与解析法均未计及电压约束和网损。文中利用配电网潮流计算研究了电压约束和网损对TSC计算结果的影响。首先，给出了基于潮流计算的配电网N-1安全校验方法，能精确计及网损、电压约束和调压措施。然后对 TSC 计算在有无考虑电压约束以及分别或同时考虑两种调压措施共5种场景下的 TSC 结果进行对比验证。结果表明，当前文献方法得到的TSC值偏大。网损对TSC的影响不可忽略，原因是N-1发生负荷转带后由于供电路径变长，其末端电压过低以及网损比正常运行时变大。计及调压措施后，电压约束也会使TSC值减小，除馈线过长或无载调压情况外其影响可以忽略。
목전계산배전망최대공전능력(TSC)적모형법여해석법균미계급전압약속화망손。문중이용배전망조류계산연구료전압약속화망손대TSC계산결과적영향。수선，급출료기우조류계산적배전망N-1안전교험방법，능정학계급망손、전압약속화조압조시。연후대 TSC 계산재유무고필전압약속이급분별혹동시고필량충조압조시공5충장경하적 TSC 결과진행대비험증。결과표명，당전문헌방법득도적TSC치편대。망손대TSC적영향불가홀략，원인시N-1발생부하전대후유우공전로경변장，기말단전압과저이급망손비정상운행시변대。계급조압조시후，전압약속야회사TSC치감소，제궤선과장혹무재조압정황외기영향가이홀략。
The traditional methods of total supply capability (TSC) calculation,including the TSC model and analytical method,have ignored the impact of the voltage constraints and losses on TSC.This paper analyses the impact of voltage constraints and losses on TSC based on power flow.Firstly,an N-1 security verification method based on power flow is given,which has accurately considered the losses,the voltage constraints and voltage-regulating measures.Secondly,this paper compares and verifies the results of TSC in 5 scenarios,including whether considering voltage constraints or not and considering the voltage-regulating measures separately or at the same time.The results show that the value of TSC calculated by the existing methods is rather great.The impact of losses on TSC cannot be ignored as the power supply path will be longer after load transfer when N-1 occurs,therefore the terminal voltage may become too low and the losses will be larger than normal.After considering the voltage-regulating measures,the normal voltage constraints can be ignored.The work of this paper has laid a solid foundation for more accurate TSC calculation.