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Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To address the challenge of solving the zero-pole of transcendental equation for distributed power station with simultaneous consideration of two factors， i.e.， dq-axis coupling and line distribution parameter， an impedance model for distributed power station considering the two factors is established. This paper proposes a matrix-determinant zero-pole solution method for transcendental equation using Padé approximation and provides detailed steps for calculating the zero-pole distribution of the transfer function. Furthermore，it analyzes the impact of the two factors on harmonic instability analysis in the system under different scenarios. The research demonstrates that the proposed method can accurately analyze harmonic instability issues when these two factors are considered simultaneously. And ignoring one of the two factors may result in the misjudgment of stability， and considering the line distribution parameter is a necessary prerequisite for solving the amplification point of high-frequency harmonics. The effectiveness of the proposed method is verified by simulation.

Copyright of Zhejiang Electric Power is the property of Zhejiang Electric Power Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)