Orthogonal Multi-Carrier Modulation(OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。
In the voltage correction the voltage variation of tie-line nodes is considered and is added into the traditional secondary voltage control as the feedback.
在电压校正中，考虑了区域联络线节点的电压变化，并以此作为反馈添加到传统的二级电压控制中。
By means of the proposed algorithm the sensitivity of nodal voltage to any network parameter can be obtained, such as line reactance, variation of reactive power of power grid and so on.
通过该算法可得到节点电压对任何网络参数的灵敏度，比如线路电抗、电网无功功率的变化等。
Considering the sensitivity of virtual nodal voltage to line reactance and variation of reactive power of power grid comprehensively, the voltage instability index is put forward.
综合考虑节点电压关于线路电抗和系统无功功率变化的灵敏度，提出了电压失稳指标。
The background harmonic voltage is related with not only the power of harmonic sources and variation of power line voltages but also the power system structure and capability.
背景谐波电压不仅与电网中谐波源强弱、网压变化有关，而且与电网容量、结构有关。由于其直接决定电网承受畸变负荷的能力，所以有必要对各种电网的背景谐波状况作全面了解和测量。
The experimental results show that this system can complete monitoring temperature variation of high voltage devices real time on-line, it also proves that the proposed project is practicable.
实验表明，该测温方法完全可以实现对高压电器内部温度的实时在线监测，该测温方案是切实可行的。
The experimental results show that this system can complete monitoring temperature variation of high voltage devices real time on-line, it also proves that the proposed project is practicable.
实验表明，该测温方法完全可以实现对高压电器内部温度的实时在线监测，该测温方案是切实可行的。
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