| 引用本文: | 陈中,陈晖,朱政光,朱英凯.含可控串联电容换流器的交直流系统静态安全域刻画与分析[J].电力自动化设备,2018,(10): |
| CHEN Zhong,CHEN Hui,ZHU Zhengguang,ZHU Yingkai.Description and analysis of steady state security region of AC/DC system with controlled series capacitor converter[J].Electric Power Automation Equipment,2018,(10): |
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| 摘要: |
| 传统电网换相直流输电发生换相失败的概率较大，且需要大量的无功补偿，而基于强迫换相原理的可控串联电容换流器(CSCC)可解决该问题。从静态安全域的角度出发，给出了含CSCC直流输电的交直流系统静态安全域断面刻画方法及边界面演变分析。安全域的几何直观性能方便调度人员或规划人员综合考虑换流器无功需求、换相失败概率、阀电压峰值限值、可控电容及换流阀的投资成本等因素，在域内选取合适的运行点，并有利于提前采取适当的安全控制措施，最大限度地降低CSCC直流输电一旦发生换相失败造成的后果比常规直流输电更严重的可能性。 |
| 关键词: 可控电容 直流输电 可控串联电容换流器 换相失败 阀电压峰值 静态安全域 |
| DOI：10.16081/j.issn.1006-6047.2018.10.014 |
| 分类号:TM46;TM721.1 |
| 基金项目:国家重点研发计划项目(2016YFB0900602)；国家自然科学基金资助项目(51277029)；江苏省智能电网技术与装备重点实验室课题 |
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| Description and analysis of steady state security region of AC/DC system with controlled series capacitor converter |
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CHEN Zhong1,2, CHEN Hui1,2, ZHU Zhengguang1,2, ZHU Yingkai3
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1.School of Electrical Engineering, Southeast University, Nanjing 210096, China;2.Jiangsu Key Laboratory of Intelligent Power Grid Technology and Equipment, Nanjing 210096, China;3.State Grid Nanjing Power Supply Company, Nanjing 210019, China
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| Abstract: |
| The traditional HVDC(High Voltage Direct Current) transmission suffers from a high risk of commutation failure and requires considerable reactive power compensation. These problems can be solved by the CSCC(Controlled Series Capacitor Converter) based on forced commutation principle. From the perspective of steady-state security region, the cross-section description method of steady-state security region and the analysis of boundary surface evolution of the AC/DC system for CSCC-HVDC are presented. The geometric intuitive performance of the security region can facilitate the system operator and planner to consider the factors including the reactive power demand of converter, commutation failure probability, peak limit of valve voltage, investment cost of controllable capacitor and converter valve, and select the appropriate operating point in this region. The security region can also contribute to adopting appropriate security control actions in advance to minimize the possibility of commutation failure for CSCC-HVDC, the occurrence of which may be more severe than conventional LCC-HVDC(Line Commutated Converter based HVDC). |
| Key words: controlled capacitor DC power transmission controlled series capacitor converter commutation failure valve voltage peak steady-state security region |
