引用本文: | 吴 娜,赵成勇,许建中.储能型STATCOM的优化电压支撑控制策略[J].电力系统保护与控制,2024,52(1):145-155.[点击复制] |
WU Na,ZHAO Chengyong,XU Jianzhong.Optimized voltage support control strategy for energy storage STATCOM[J].Power System Protection and Control,2024,52(1):145-155[点击复制] |
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摘要: |
针对高压直流输电系统受端换流站发生接地故障时暂态电压失稳问题,提出一种综合故障检测与有功无功输出的储能型链式静止同步补偿器(static synchronous compensator, STATCOM)控制策略。储能型STATCOM具有功率四象限运行能力,通过协调装置输出的有功、无功功率可以优化电压支撑效果。首先,改进了故障检测方法,采用双重检测快速判断故障起止时刻。其次,在故障期间控制储能型STATCOM输出一定量的有功功率,可以有效抑制受端连续换相失败,抬升交流电压最低值。同时,对无功功率进行控制切换,避免故障清除后无功回撤不及时导致的受端暂态过电压问题。在PSCAD/EMTDC仿真平台的CIGRE标准系统中对所提电压支撑控制策略与储能型STATCOM常规控制进行对比。结果表明,在不同故障场景中,所提控制策略均能达到更好地电压支撑的效果。 |
关键词: 储能型STATCOM 故障检测 换相失败 无功切换策略 暂态过电压 |
DOI:10.19783/j.cnki.pspc.230725 |
投稿时间:2023-06-14修订日期:2023-07-20 |
基金项目:国家自然科学基金面上项目资助(52277094);国家电网公司总部科技项目资助(5500-202158475A-0-5-ZN) |
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Optimized voltage support control strategy for energy storage STATCOM |
WU Na,ZHAO Chengyong,XU Jianzhong |
(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
(North China Electric Power University), Beijing 102206, China) |
Abstract: |
A comprehensive fault detection and active/reactive power output control strategy for energy storage STATCOM is proposed, which addresses the issue of transient voltage instability caused by grounding faults at the receiving-end converter station in high-voltage direct current (HVDC) transmission systems. The energy storage STATCOM possesses the capability of four-quadrant power operation, and by coordinating the active and reactive power output of the device, the voltage support effect can be optimized. First, an improved fault detection method is introduced, which utilizes dual detection to quickly determine the start and end times of faults. Second, during the fault period, the energy storage STATCOM is controlled to output a certain amount of active power, effectively suppressing continuous commutation failures at the receiving end and raising the minimum value of the AC voltage. Simultaneously, control switching of reactive power is implemented to avoid transient overvoltage issues at the receiving end caused by delayed reactive power withdrawal after fault clearance. The proposed voltage support control strategy is compared with conventional control of energy storage STATCOM using the PSCAD/EMTDC simulation platform based on the CIGRE standard system. The results indicate that the proposed control strategy achieves optimized voltage support effects in different fault scenarios. |
Key words: energy storage STATCOM fault detection commutation failure reactive power switching strategy transient overvoltage |