| 引用本文: | 尹纯亚,李凤婷,王丹东,刘渊,付林.风电高渗透率交直流外送系统直流闭锁稳控方案研究[J].电力系统保护与控制,2019,47(3):95-102.[点击复制] |
| YIN Chunya,LI Fengting,WANG D,et al.Research on stability control scheme for AC/DC hybrid transmission system with wind power high permeability under DC blocking[J].Power System Protection and Control,2019,47(3):95-102[点击复制] |
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| 摘要: |
| 针对特高压直流闭锁后的交流系统暂态过电压问题，深入剖析了直流闭锁后盈余的无功功率、短路容量与交流系统暂态过电压的关系，对比分析了安控切风电与极控切滤波器时序对交流系统暂态过电压的影响。提出基于风电机组故障穿越能力的交流系统稳控方案以及相应的暂态过电压抑制措施。以DIgSILENT为平台搭建哈密电网仿真模型，对所提稳控方案及暂态过电压抑制措施的正确性和可行性进行了仿真验证。仿真结果表明，所提稳控方案及暂态过电压抑制措施可有效降低系统暂态过电压，规避风电机组连锁脱网的风险，并有利于交流系统电压恢复。 |
| 关键词: 特高压直流 直流闭锁 稳控方案 暂态过电压 交直流系统 |
| DOI：10.7667/PSPC180132 |
| 投稿时间：2018-01-29修订日期：2018-03-28 |
| 基金项目:国家自然科学基金项目资助(51877185);新疆维吾尔自治区科技支疆项目资助(2017E0277) |
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| Research on stability control scheme for AC/DC hybrid transmission system with wind power high permeability under DC blocking |
| YIN Chunya,LI Fengting,WANG Dandong,LIU Yuan,FU Lin |
| (School of Electrical Engineering, Xinjiang University, Urumqi 830047, China;Zhengzhou Administrative Bureau, State Grid Operation Company, Zhengzhou 451452, China;Changji Power Supply Company, State Grid Xinjiang Electric Power Co., Ltd, Changji 831199, China;Economic Research Institute, State Grid Xinjiang Electric Power Co., Ltd., Urumqi 830002, China) |
| Abstract: |
| Aiming at transient overvoltage problem of Alternating Current (AC) system after Ultra-High Voltage Direct Current (UHVDC) system blocking, surplus reactive power after UHVDC system blocking and short circuit capacity are deduced, and the relationship between these two parameters and transient overvoltage of AC system are analyzed in detail. Subsequently, the influence on AC system transient overvoltage exerted by timing sequence of wind turbines tripping by safety and stability control system and filter tripping by pole control system is analyzed contrastively. A stability control scheme based on wind turbine Fault Ride Through (FRT) capability and the corresponding transient overvoltage suppression strategy are proposed. Lastly, a simulation model of power grid in Hami is established based on DIgSILENT experiment platform to verify the validity and feasibility of the proposed stability control scheme and transient overvoltage suppression strategy. Simulation results verify that the proposed stability control scheme and transient overvoltage suppression strategy can reduce transient overvoltage effectively, avoid the risk of wind turbines cascading trip-off, and promote voltage recovery of AC system. This work is supported by National Natural Science Foundation of China (No. 51877185). |
| Key words: UHVDC DC blocking stability control scheme transient overvoltage AC/DC hybrid transmission system |
