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常规距离保护
相关语句
  conventional distance protection
     An expert system for power system distance protection setting programming has been prepared by authors which is based on conventional distance protection setting calculations combined with theory of expert system and mixed language programming techniques. The finished system has been applied to a practical power network having 120 nodes and more than 200branches and satisfactory results have been obtained.
     本文在常规距离保护整定计算的基础上,结合专家系统理论,采用混合编程技术,研制了一套实用型距离保护整定计算专家系统,经120个节点,200多支路的实际网络计算,结果符合工程要求,达到预期效果,已在电网中应用。
短句来源
     This paper introduces the specific solution to computer distance protection, compares its technical feature with conventional distance protection and analyses the difference between the two.
     为此 ,就微机型距离保护解决问题的特殊处理方法进行了介绍 ,并与常规距离保护的技术特点进行了分析比较
短句来源
  相似匹配句对
     Intelligent distance protection
     智能式距离保护
短句来源
     A New Method of Microprocessior-Based Distance Protection
     微机距离保护的新方法
短句来源
     Distance
     距离
短句来源
     Comparison between computer distance protection and conventional distance protection
     微机型距离保护常规保护的技术特点比较
短句来源
     Methods Conventional cardiopulmonary bypass and myocardial conservation were used to all patients.
     方法常规体外循环及心肌保护
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An expert system for power system distance protection setting programming has been prepared by authors which is based on conventional distance protection setting calculations combined with theory of expert system and mixed language programming techniques. The finished system has been applied to a practical power network having 120 nodes and more than 200branches and satisfactory results have been obtained.

本文在常规距离保护整定计算的基础上,结合专家系统理论,采用混合编程技术,研制了一套实用型距离保护整定计算专家系统,经120个节点,200多支路的实际网络计算,结果符合工程要求,达到预期效果,已在电网中应用。

Computer distance protection is developed on the technical base of conventional distance protection. The latter works with an analog circuit, while the former works with various algorithms to achieve various functions. This paper introduces the specific solution to computer distance protection, compares its technical feature with conventional distance protection and analyses the difference between the two.

微机型距离保护是在常规型距离保护的技术基础上发展起来的。后者通过模拟电路来工作 ,前者通过不同的应用算法实现其不同功能。为此 ,就微机型距离保护解决问题的特殊处理方法进行了介绍 ,并与常规距离保护的技术特点进行了分析比较

Simple delay approach is usually used to prevent transient overreach caused by the transient error of CVT. It is very harmful to the safety and stability of power system. A proposed real-time CVT transient error estimation approach based on the chosen fundamental wave algorithm and the rated CVT parameters consists of two stages. The first stage obtains the error coefficient. The second stage estimates the measured error of the voltage amplitude according to the secondary side voltage. A novel adaptive...

Simple delay approach is usually used to prevent transient overreach caused by the transient error of CVT. It is very harmful to the safety and stability of power system. A proposed real-time CVT transient error estimation approach based on the chosen fundamental wave algorithm and the rated CVT parameters consists of two stages. The first stage obtains the error coefficient. The second stage estimates the measured error of the voltage amplitude according to the secondary side voltage. A novel adaptive distance relay approach which can adjust action thresholds according to the error is proposed. The approach hardly affects the action performance for normal lines and acts rapidly for short lines with close-in faults, which is verified by the results of simulations. The whole performance is improved greatly compared with common distance relay approach.

针对电容式电压互感器(CVT)暂态过程引起距离保护超越的问题,通常采用简单延时的方法,来防止保护的超越。这对电力系统的安全稳定运行是很不利的。该文提出了CVT 暂态误差的实时估计方法,即根据所选用的基波算法和 CVT 的额定参数求出误差系数,然后根据二次电压的大小实时估计出电压幅值的测量误差。据此提出了一种自适应距离保护方法,根据误差的大小调整动作门槛。仿真计算表明,文中提出的方法对于普通线路,其动作性能几乎不受影响;对于短线路,也能够在近处故障时快速动作。其整体性能较常规的距离保护方案有了很大的提高。

 
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