The main works are as follows : a new hybrid simulation model of hvdc system is established based on netomac ' s hybrid simulation function in this paper 主要内容包括： 1基于netomac软件的混合仿真功能，建立了直流输电系统的混合仿真计算模型。
This paper designed a nonlinear controller for hvdc system by the relation extent method . then validate it by digital simulation 本文在系统数学模型的基础上采用关系度和零动态结合的方法设计了高压直流输电系统非线性控制器，并进行了仿真验证。
The essence of the method is that , it is basically a nonlinear method and is adaptable to multi - machine hybrid ac / dc power systems 该方法的创新之处在于，它所研究的对象是多馈入直流输电系统，所采用的调制方法是非线性的，且适用于多机电力系统c6
The application of flexible ac transmission system ( facts ) is quite promising in power systems . it becomes one of the research emphases in recent years 灵活交流输电系统( facts )技术在电力系统中有着广阔的应用前景，是近年来电力系统研究的前沿课题之一。
The unit is scheduled to be commissioned in 2004 . hec s transmission system operates at 275kv , 132kv and 66kv and distribution is effected mainly at 11kv and 380 volts 港灯的输电系统分别以275千伏特、 132千伏特和66千伏特输电，配电则主要采用11千伏特和380伏特。
For the four - knots power transfer system , it is found by the paper that decreasing market concentration degree will reduce market efficiency ( although the cost will not be influenced ) 对于四节点输电系统，本论文研究发现，降低市场集中程度将降低市场效率（即使成本不受影响） 。
The performance of its basic controller decides the operation condition of hvdc system . for improving the system stability in ac / dc system , the additional controller is very important 直流输电系统能否正常运行与其基本控制器的性能息息相关，附加控制器又是提高交直流互联系统运行稳定性的重要保证。
In the light of use of transmission system , revenue reconciliation is realized by use of a surcharge , which does not change the spot price signal and hence attains maximum socia1 welfare 基于对输电系统利用率的思想，收支平衡采用附加费的方式实现，并未改变最优的电价信号，因而可以获得最大的社会效益。
The associated transmission and distribution systems are wholly owned by clp power . its transmission system operates at 400kv , 132kv and 66kv , and distribution is effected mainly at 33kv , 11kv and 380 volts 中电的输电系统分别以400千伏特、 132千伏特和66千伏特输电，配电则主要采用33千伏特、 11千伏特和380伏特。
Satisfactory results prove that the method is reasonable . at last , this paper analyses the tracing method based on the power flow , presents a new procedure for allocating transmission losses to generators and loads 最后，本文对基于功率跟踪潮流法的网损分摊作了进一步研究，提出了一种新的输电系统网损分摊方法。
