引用本文: | 孔剑虹,姜学朴,吴江宁,等.梯度因子估计虚拟同步发电机阻尼的配置方法[J].电力系统保护与控制,2018,46(9):103-109.[点击复制] |
KONG Jianhong,JIANG Xuepu,WU Jiangning,et al.Damping configuration of the virtual synchronous generator using gradient factor estimation[J].Power System Protection and Control,2018,46(9):103-109[点击复制] |
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摘要: |
针对电网接入分布式发电机时出现的功率振荡问题,建立了虚拟同步发电机(Virtual Synchronous Generator,VSG)控制的并网逆变器功率控制模型。以功率圆模型推导VSG控制的摇摆方程,引入梯度因子实现了摇摆方程中有功和无功功率的线性独立控制。建立输入输出功率最优二阶阶跃响应模型,设计出线性独立VSG控制摇摆方程阻尼配置方法,阻尼比取0.707时系统的功率振荡恢复到稳定状态的动态响应效果最优。仿真结果表明了所采用的梯度因子和阻尼配置方法的有效性。 |
关键词: 分布式发电机 功率振荡 虚拟同步发电机 梯度因子 阻尼比 |
DOI:10.7667/PSPC170510 |
投稿时间:2017-04-10修订日期:2017-07-08 |
基金项目:国家电网公司总部科技项目(080);国家电网公司科技项目(2015YF-56) |
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Damping configuration of the virtual synchronous generator using gradient factor estimation |
KONG Jianhong,JIANG Xuepu,WU Jiangning,XU Wen |
(Dalian Power Supply Company, State Grid Liaoning Electric Power Co., Ltd, Dalian 116011, China) |
Abstract: |
Grid power oscillation occurs when distributed generators connected to grid, the model of grid-connected inverter controlled by Virtual Synchronous Generator (VSG) is established, and its swing equation of VSG control is conducted using power circle model. The process to the linearization and independence of active and reactive power is realized by introducing gradient coefficient. The optimal second-order step response model of input power and output power is established, and the damping configuration method of linear independent VSG control swing equation is designed. When the damping ratio gets 0.707, the dynamic response to power oscillation in low frequency to steady state in the parallel power system gets optimal. The simulation results show that the proposed gradient coefficient and damping configuration are effective. This work is supported by Science and Technology Project of State Grid Corporation of China Headquarters (No. 080 and No.2015YF-56). |
Key words: distributed generators power oscillation virtual synchronous generator gradient coefficient damping configuration |