| 引用本文: | 李葛亮,谢桦,赵新,沈沉.基于降阶谐振调节器的正负序分量检测方法[J].电力系统保护与控制,2013,41(14):40-47.[点击复制] |
| LI Ge-liang,XIE Hua,ZHAO Xin,SHEN Chen.Positive- and negative-sequence component detecting method based on reduced order resonant regulator[J].Power System Protection and Control,2013,41(14):40-47[点击复制] |
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| 摘要: |
| 在电网不平衡下并网逆变器的控制策略中需对电网电压进行正负序分量准确检测，还需要对电流的正负序分量进行控制。研究了一种谐振调节器，该调节器是由传统的二阶谐振（SOGI）调节器降阶得到，称之为降阶谐振（ROR）调节器，理论分析表明，其能在特定频率下对交流量的正序或负序分量实现独立的无静差调节。将其应用在电网电压和电流的正负序检测中，提出一种新的电网电压和电流正负序检测方法，该方法加入了调节器的积分系数，角频率由锁相环反馈得到，实现自适应调节。仿真和实验验证了所提方法动态响应快，能在静止坐标系下分别对电网基波正 |
| 关键词: 电网不平衡 并网逆变器 正负序分量 降阶谐振调节器 二阶广义积分器 |
| DOI：10.7667/j.issn.1674-3415.2013.14.007 |
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| 基金项目:清华大学电力系统及发电设备安全控制及仿真国家重点实验室开放基金 |
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| Positive- and negative-sequence component detecting method based on reduced order resonant regulator |
| LI Ge-liang1,XIE Hua1,ZHAO Xin1,SHEN Chen2 |
| () |
| Abstract: |
| Grid connected inverter’s control strategy needs to detect the positive- and negative-sequence component of voltages and currents under unbalanced voltage condition in the power system. This paper studies a kind of resonant controller called the reduced order resonance (ROR) regulator, which is reduced from the traditional second order generalized integrator (SOGI). The regulator is able to achieve floating control of alternating voltage’s positive- or negative-component independently at a given frequency. A new positive- and negative-sequence component detecting method is proposed. Integral factor is added in the regulator and the angular frequency is obtained by phase locked loop’s feedback. Simulation and experiment results show the proposed method can achieve zero error tracking of grid voltage’s positive- and negative- component in stationary reference frame quickly, and has fast dynamic response and a certain degree of harmonic suppression ability. |
| Key words: unbalanced voltage condition grid connected inverter positive- and negative-component reduced order resonance regulator second order generalized integrator |
