| 引用本文: | 孙 冰,包 丹,张 磊.考虑惯性与阻尼特性的MMC-HVDC附加功率控制策略[J].电力系统保护与控制,2020,48(17):108-114.[点击复制] |
| SUN Bing,BAO Dan,ZHANG Lei.Supplementary power control scheme for an MMC-HVDC station considering inertia and damping[J].Power System Protection and Control,2020,48(17):108-114[点击复制] |
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| 摘要: |
| 为了解决模拟同步电机控制因电网频率静态波动导致的输出有功偏移问题，实现换流站输出有功的精准控制，提出了一种含阻尼控制的附加有功控制策略。通过对有功功率偏移量进行积分实时修正频率指令值，消除了因频率静态波动引起的功率偏移。通过在附加功率控制输入环节引入阻尼控制，提高系统的动态品质及稳定性。为了实现换流站对电网频率调节的选择性，设计了附加功率控制的投切策略。采用PSCAD/EMTDC平台，对提出的方案进行仿真验证。结果表明：附加功率控制策略不会影响本地换流站联网/孤岛运行模式的切换，保留了模拟同步电机控制的优点；电网稳态运行时，可消除直流电压和输出有功功率的偏移，提升换流站稳态运行特性；系统动态调节时，可抑制系统的功率振荡，对换流站输出功率实现快速准确控制。 |
| 关键词: 附加控制 阻尼控制 模式切换 模拟同步电机控制 柔性直流输电 |
| DOI：DOI: 10.19783/j.cnki.pspc.190933 |
| 投稿时间：2019-08-01修订日期：2019-11-18 |
| 基金项目:国家重点研发计划项目资助(2017YFB0902000)；国家电网公司科技项目资助(SGXJ0000KXJS1700841) |
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| Supplementary power control scheme for an MMC-HVDC station considering inertia and damping |
| SUN Bing,BAO Dan,ZHANG Lei |
| (1. State Grid Xinjiang Electric Power Research Institute, Urumqi 830002, China; 2. Northeast Branch of State Grid
Corporation of China, Shenyang 110180, China; 3. State Key Laboratory of Operation and Control of Renewable
Energy & Storage Systems (China Electric Power Research Intitute), Nanjing 210003, China) |
| Abstract: |
| A supplementary power control strategy with enhanced damping is proposed for an MMC station to eliminate the active power deviation resulting from synchronous generator emulation control in the condition of steady-state grid frequency fluctuation. With the proposed method, the frequency command is corrected in real time by integrating the active power deviation to control the output power more accurately. A damping control is introduced to the supplementary power control loop. This can improve the dynamic performance and stability of the system. Also, a switching strategy is designed to achieve the selectivity needed for the converter station to participate in grid power regulation. Simulations are conducted in PSCAD/EMTDC to verify the effectiveness of the proposed scheme. The results show that the transition between grid-connection and island mode is not disturbed under the proposed method. Under steady-state grid operation, the deviation of DC voltage and output active power can be eliminated. This improves the steady-state performance of the MMC station; under the transient period, the power oscillation of the system is suppressed, and the output power of the converter station can be controlled quickly and accurately.
This work is supported by National Key Research and Development Program of China (No. 2017YFB0902000) and Science and Technology Project of State Grid Corporation of China (No. SGXJ0000KXJS1700841). |
| Key words: supplementary power control damping control control mode switching synchronous generator emulation control MMC-HVDC |
