Application of Stability Control System in Xinjiang
Contents Profile Problem Solution Prospective
Profile Xinjiang Land, 1/6 Natural gas, 1/3 Oil, 1/4 Coal, 40% Wind, 40% Installation 21GW Export 1GW
Profile 凤凰 乌北 吐鲁番 哈密 巴州 安西 酒泉 1900km, 2010 日月山 西宁 拉西瓦 金昌 官亭兰州东 德阳 贺兰山 白银黄河武胜 宝鸡 HVDC 平凉 ±660,4000MW,1335kM HVDC 乾县 信义 HVDC B-B HVDC 120kV,360MW 120kV,750MW ±500kV,3000MW,570kM
Profile North 3560km
Problem Wind,, North Voltage & transient Stability => Bottleneck for export 3560km
Problem North 3560km 1400+MW, 43% Thermal, dynamic and Transient Stability at different nodes => Bottleneck for 500+MW
North Problem Majority of installation and load, 80% 3560km Overload after trip of parallel line
Problem North Import power via 750/220kV in parallel 750kV Double Circuit on Same Tower ==> Overload, Islanding 3560km Thermal & frequency Stability
Problem North 3560km Import power LOE->voltage stability Radial topology- >Subject to being islanded
Solution Regional Stability Control System Master Station Control Center Event-driven mechanism Optical Fiber Substation A: Slave Station 1 Substation B: Slave Station 2 Substation C: Slave Station n Optical Fiber Optical Fiber Substation D Execution 1 Generation A: Execution n Substation E: Execution 1 Generation B: Execution n
Solution North 3560km SCS 2007
Solution North 3560km SCS
Solution 玛纳斯电厂 220kV 乌北站 新湖执行站芳草湖执行站 220kV 南湖电厂 骆驼圈子执行站西郊执行站红光变执行站天光电厂 北郊执行站小营房变执行站新城变执行站台远变 库车电厂 库车城东执行站阿克苏变 阿克苏北城执行站英吉沙 玉龙变 下坂地前海电厂喀什中心变执行站岳普湖执行站鄯善执行站园区变执行站葡萄沟执行站小草湖变 高昌执行站达浪坎执行站托克逊变 龟兹变 莎车变 喀什变 红帆 察汗乌苏电厂 金沙 金鹿变 楼兰变 拜城电厂 750kV 敦煌变 750kV 酒泉变 750kV 金昌变 750kV 巴州变 恰甫其海 特克斯站 铁厂沟站 宁远站 额敏执行站和什特洛盖执行站冬古列执行站恰夏执行站晨光执行站伊宁县变执行站西郊变执行站中心执行站 750kV 凤凰变 750kV 乌北站 750kV 吐鲁番站 750kV 哈密站 750kV MS 220kV MS Execute S 额尔齐斯站 喀腊塑克 冲乎尔水电 托克逊重工业园 塔什店电厂执行站市南变执行站中心变执行站西尼尔执行站城西变执行站市北变执行站库车城西执行站沙雅执行站新和执行站阿克苏中心执行站五团执行站阿瓦提执行站阿图什执行站北郊变执行站东郊变执行站 F3 F2 F1 F0 F1 F2 F3 F5 F4 红旗坡执行站胡杨执行站丰收三场执行站牌楼执行站色力不亚执行站巴楚执行站喀什燃机电厂 220kV 巴州站 库尔勒变 吉林台二级 城西执行站苇二电厂 碱梁执行站红雁池二电厂 神华矸石电厂 红雁池电厂 老满城 头屯河 五家渠执行站长宁 昌热三期 三宫 岗信铝业 柳中执行站材园执行站农盛变执行站 220kV 哈密站 交河变 220kV 吐鲁番站 龙湾站 吉木乃风电 青河站 富蕴站 皇宫站 沙湾站 青年站 波波娜 玛电三期 石河子东 石河子西 乌苏电厂 赛尔电厂 锦疆电厂 和丰站 奎屯站 吉林台电厂 下野地站 克拉玛依 别迭里小石侠徐矿电厂 白水变 洛浦变执行站墨玉变执行站和田中心变执行站 220kV 凤凰站 达风变 达风变 140+ S S North
North Solution Wind,, Voltage & transient Stability Voltage & transient => Stability Bottleneck for export => Bottleneck for ->Generator rejection export 3560km
Solution North 3560km Import power LOE->voltage stability ->Load shedding ->Trip shunt reactor to maintain the voltage
North Solution Overload after trip of parallel line 3560km ->Instantaneous generator rejection based on pre-fault power flow and fault information ->Delayed generator rejection based on post-fault overload, two stages.
Solution North Import power via 750/220kV in parallel 750kV Double Circuit on Same Tower ==> Overload, Islanding 3560km ->Load shedding ->Trip shunt reactor to maintain the voltage
Results Solution 10+ operations Jun 24,2007, the first day of commercial operation Aug 10, 2007 Aug 21, 2007 SCS in south part, increases supply capability 140MW
Solution Some key points Detection on generator slow shutdown Detection on Loss of excitation Direct detection based on electric quantities measurements Signal from LOE Load shedding allocation Based on priority in local area Based on sensitivity among different areas
±800kV HVDC to Zhengzhou, 8000MW,2210km Constructed from 2012 Prospective ±1100kV HVDC to Chengdu 10000MW,2700km Constructed before 2015 ±800kV HVDC to Chongqing 8000MW,2300km Constructed from 2012 Installation 77.5GW,2015 Export: 30GW,2015 60GW, 2020 Local load: 30GW, 2015 To 750kV HVAC
Prospective High portion of Export 5% => 50% 750kV/220kV in parallel Overload Angle and voltage stability HVDC Blocking Frequency stability SCS is still needed!
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