直流功率调制对黑龙江电网功角稳定性的作用分析

Study of Rotor Angle Stability of Heilongjiang Power Grid by HVDC Power Modulation

以黑龙江电网为研究对象，当南送吉林、辽宁电网的交流通道发生故障时，将导致原来流向吉林、辽宁的潮流沿哈南-华民方向汇人扎鲁特，增加了潮流通道的等效阻抗，给黑龙江电网带来功角稳定性问题。本文利用扎青直流的功率调制来改善黑龙江电网的功角稳定性，提出利用Prony分析法对直流调制器进行参数整定，讨论了调制增益的变化对系统稳定性的影响。研究结果对实际电网运行中功角稳定性的改善具有一定的参考价值。

When fault occurs in AC channel which sent electric power from Heilongjiang to Jilin and Liaoning, the unbalance of power and the increase of transfer impedance will bring a great challenge to the rotor angle stability of the Heilongjiang grid. HVDC modulation has been considered to improve the rotor angle transient stability. The Prony method is used to tune the DC power modulator, and the influence of the variation of modulation gain on the stability of the system is also discussed. The study results are expected to be helpful for the operation of Heilongjiang power grid.