A novel index named comprehensive unit interaction factor is proposed to quantify the torsional interaction in an ac system with multiple HVDC converters.
提出了一种衡量多换流站系统机组扭振作用的新指标一综合机组作用系数。
The UHVDC power transmission project from Yunnan to Guangdong is embedded into ac system, so the Yunnan power grid at the sending end will face with challenges.
云南-广东特高压直流嵌入交流系统运行，将使送端云南电网面临诸多挑战。
Discussed the cooling method of ac system in the high-density it room, and the concept of green data center. In addition, the actual effect of design had been verified by CFD simulation.
论述了高密度机房空调系统的冷却方式，以及绿色数据中心的概念，并采用CFD模拟论证了设计的实际效果。
Low voltage AC system operating voltages from 120 to 600 VAC.
低压交流电系统中从120到600VAC的电压称为低压。
Energy conservation of AC system is commonly concerned by people.
空调系统的节能是人们普遍关心的问题。
Medium voltage AC system operating voltages from 601 to 15000 VAC.
中压交流电系统中从601到15000VAC的电压称为中压。
The influences of load models on transient stability of a multi-infeed DC and AC system are analyzed at length.
分析负荷模型对多馈入交直流系统功角稳定性的影响。
The DC system is normally supplied from a battery charger system, which is supplied from the low voltage AC system.
直流系统通常由蓄电池充电系统供电，蓄电池充电系统由低压交流系统供电。
The paper summarizes the effect of AC system on underground pipelines. Some measures on how to avoid its interference are put forward.
综述交流电力线路对埋地管道交流干扰的危害，提出防止危害的几条措施。
The high voltage direct current (HVDC) system connected with weak AC system is considered to be one of the causes for voltage instability.
与弱交流系统相连的高压直流系统被认为是引起电压不稳定的一个因素，评价交直流系统电压稳定性的方法相当复杂。
In AC system, working voltage not more than 1.1 times of rated voltage. In DC system, working voltage not more than 1.5 times of rated voltage.
交流系统中，工作电压不大于额定电压1.1倍，直流系统中，工作电压不大于额定电压1.5倍。
At the same time, problems of the DC grounding system are valuable because it is not only significant in HVDC operation but also affects the AC system nearby.
同时，直流接地极关系着高压直流输电系统的安全运行，对于附近的交流系统也有影响，其中的一些问题也十分值得研究。
The QSS (Quasi Steady State) model of converter which neglects the negative impedance of DC system will bring some errors when unbalanced fault occurs in AC system.
当交流系统发生三相不对称故障时，忽略直流系统负序分量的准稳态模型将给交直流混合系统的仿真带来较大的误差。
Through decades of the hard work, the flow calculation for AC system has been quiet mature, among which the most commonly used are the Newton method and PQ Decomposition.
经过电力科技工作者们几十年的研究，纯交流系统的潮流算法现在已经相当成熟，其中最常用的是牛顿法和PQ分解法。
The low voltage DC system is one of the most important equipments in converter station, which is closely associated with the safety and stability of DC transmission system and correlative AC system.
低压直流输电系统是换流站内重要设备之一，直接影响到整个直流输电系统及相关交流系统的安全稳定运行。
It is based on the unified iterative method and gives a complete consideration to the coupling relations between AC system and DC system, so its convergence is as good as the unified iterative method.
该算法基于统一迭代法，完整考虑了交、直流系统间的耦合关系，因此，它与统一迭代法一样，具有良好的收敛性。
It is based on the unified iterative method and gives a complete consideration to the coupling relations between AC system and DC system, so its convergence is as good as the unified iterative method.
该算法基于统一迭代法，完整考虑了交、直流系统间的耦合关系，因此，它与统一迭代法一样，具有良好的收敛性。
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