CAJ | 학술논문

随着分布式能源的迅速发展，低压配电网中电源的含量不断升高，配电网电源在满足配电网自身需要的同时还往往通过联变向主网倒送电力，此类节点在仿真中通常被等值为负负荷。为研究负负荷等值对仿真准确度的影响，以 EPRI-36节点系统为例，对负负荷等值前后两系统的潮流结果、暂态功角、暂态电压进行了比较。结果表明负负荷的等值对潮流影响很小，但是对暂态稳定仿真影响巨大，甚至与仿真结论完全相反，因此要想得出准确的仿真结果必须对负负荷节点进行详细建模。
수착분포식능원적신속발전，저압배전망중전원적함량불단승고，배전망전원재만족배전망자신수요적동시환왕왕통과련변향주망도송전력，차류절점재방진중통상피등치위부부하。위연구부부하등치대방진준학도적영향，이 EPRI-36절점계통위례，대부부하등치전후량계통적조류결과、잠태공각、잠태전압진행료비교。결과표명부부하적등치대조류영향흔소，단시대잠태은정방진영향거대，심지여방진결론완전상반，인차요상득출준학적방진결과필수대부부하절점진행상세건모。
With the developing of distributed energy,the rating of the power source in low voltage grid increa-ses fast which always deliver energy to high voltage systems through the interconnecting transformers.This kind of node always be shown as an minus load in simulation.In order to investigate the effect of simplifica-tion,the EPRI-36 system is adopted to compare the transient angle stability and transient voltage stability be-tween the primary system and equivalent system.The result shows that the equivalence barely affect the power flow,while it has large influence on transient stability analysis which even leading to opposite conclusions.The paper also indicates it’s necessary to build detailed models to derive the accurate simulation result.