Security Stability Analysis and Control Strategy of Sending-End Power Grid of ±800 kV Yan-Huai UHVDC

doi:10.11930/j.issn.1004-9649.201707130

Abstract

Abstract: Security and stability characteristics of sending-end grid of Yan-Huai UHVDC is analyzed in detail. The UHVDC system is a wind-thermal-bundled system without support of thermal power generation. The influence of different connection methods on transient voltage of wind generator after one-time commutation failure of Yan-Huai UHVDC is analyzed. Generator tripping control strategy is proposed with consideration of power transfer and voltage stability in areas close to converter station and north Shanxi area. A deployment scheme of stability control devices is designed to realize cooperative control of tripping generators in different areas. Considering different spare levels of generators, pre-control operation powers of Yan-Huai UHVDC are proposed after analyzing coupling characteristic of stability control systems between sending-end system of Yan-Huai UHVDC and North Shanxi. Risk of generator tripping due to insufficient capacity is quantified after success operation of two sets of stability control device. Simulation results and analysis based on real-sized power grid in China prove rationality and effectiveness of proposed control strategies. The simulation and analysis result provides references for stability analysis and control strategy development of the similar sending-end system of UHVDC projects.

Key words: wind-thermal-bundled, UHVDC, transient voltage, control strategy, security and stability control device

CLC Number:

TM721.1

PAN Jie, ZHENG Huiping, ZHANG Hongli, WANG Chao, XUE Zhiwei, LIU Fusuo, WU Chenxi. Security Stability Analysis and Control Strategy of Sending-End Power Grid of ±800 kV Yan-Huai UHVDC[J]. Electric Power, 2018, 51(4): 7-14.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201707130

https://www.electricpower.com.cn/EN/Y2018/V51/I4/7

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