电网技术
電網技術
전망기술
POWER SYSTEM TECHNOLOGY
2012年
3期
108-112
,共5页
翁华%徐政%王兴刚%游广增
翁華%徐政%王興剛%遊廣增
옹화%서정%왕흥강%유엄증
交直流系统%动态等值%电磁暂态%南方电网
交直流繫統%動態等值%電磁暫態%南方電網
교직류계통%동태등치%전자잠태%남방전망
KEY WORDS: AC/DC system%dynamic equivalence%electromagnetic transient%China Southern Power Grid (CSG)
为了在PSCAD/EMTDC中搭建南方电网交直流系统,研究南方电网交直流动态特性,提出了简化南方电网大规模交直流系统的方法。该方法保留交直流系统中500kV电压等级的主干网架、直流线路以及直流换流站与主干网架的交流通道,而对交流系统220kV及以下电压等级的低压网络进行简化等值。具体包括以下步骤:首先对主干网架上的500kV母线进行无误差的简化;然后对系统中所有500kV母线进行扫描,确定每个500kV母线所连的低压网络;最后对每个500kV母线下的低电压等级网络进行简化,对等值发电机和负荷的动态参数进行聚合。使用文中所述方法对南方电网交直流系统进行简化。动态仿真结果及误差分析验证了该方法的有效性。
為瞭在PSCAD/EMTDC中搭建南方電網交直流繫統,研究南方電網交直流動態特性,提齣瞭簡化南方電網大規模交直流繫統的方法。該方法保留交直流繫統中500kV電壓等級的主榦網架、直流線路以及直流換流站與主榦網架的交流通道,而對交流繫統220kV及以下電壓等級的低壓網絡進行簡化等值。具體包括以下步驟:首先對主榦網架上的500kV母線進行無誤差的簡化;然後對繫統中所有500kV母線進行掃描,確定每箇500kV母線所連的低壓網絡;最後對每箇500kV母線下的低電壓等級網絡進行簡化,對等值髮電機和負荷的動態參數進行聚閤。使用文中所述方法對南方電網交直流繫統進行簡化。動態倣真結果及誤差分析驗證瞭該方法的有效性。
위료재PSCAD/EMTDC중탑건남방전망교직류계통,연구남방전망교직류동태특성,제출료간화남방전망대규모교직류계통적방법。해방법보류교직류계통중500kV전압등급적주간망가、직류선로이급직류환류참여주간망가적교류통도,이대교류계통220kV급이하전압등급적저압망락진행간화등치。구체포괄이하보취:수선대주간망가상적500kV모선진행무오차적간화;연후대계통중소유500kV모선진행소묘,학정매개500kV모선소련적저압망락;최후대매개500kV모선하적저전압등급망락진행간화,대등치발전궤화부하적동태삼수진행취합。사용문중소술방법대남방전망교직류계통진행간화。동태방진결과급오차분석험증료해방법적유효성。
To construct simulation model for AC/DC system of China Southern Power Grid (CSG) by PSCAD/EMTDC software to research dynamic characteristics of the AC/DC system, a method to reduce large-scale AC/DC system of CSG is proposed. In the proposed method, the 500 kV backbone network of the AC/DC system, DC transmission line and the AC transmission lines connecting DC converter stations to AC backbone are reserved, and the simplification and equivalence of low voltage AC networks, namely in 220 kV and lower voltage classes, are performed. The concrete procedures are as following: firstly, the 500kV buses of backbone network are simplified by zero difference technique; then all 500 kV buses of backbone network are scanned to find out to determine the lower voltage network connected to each 500 kV bus; finally the lower voltage network connected to each 500 kV bus are reduced, and dynamic parameters of equivalent generators and loads are aggregated. Using above-mentioned method the CSG is reduced and both dynamic simulation results and error analysis results show that the proposed method is effective.