A calculation method of transient DC component of three phase short circuit current is proposed. Using a multi-machine model system, 4 different methods are compared, which are catenacci, AIEE, and 4 parameters methods together with the proposed method. Among all these four methods the proposed ...
故障电力系统算法导纳faultcalculation 电力系统复杂故障算法的研究 龚仁敏,禹成七,张永浩,车立志 (华北电力大学电力工程系,河北保定071003) 摘要:本文从故障口边界的一般形式出发,综合应用相序参数变换技术和广义戴维南定理,详细推导出一种 计算电力系统复杂故障中故障端口电流的方法。文中算法采用故障类型导纳参数模型,不但...
Fault calculation is very important in power system analysis and calculation. In traditional fault calculation software there are some shortcomings in these aspects: the data modeling of complicated power network, the organization and management of data, the processing ability of complicated fault calculat...
The knowledge of DC time constants in fault currents at system nodes is important to design the protection system and validate the calculation models for power system simulations. In this paper, we present methods to estimate Thévenin's impedance and DC time constants in fault currents with applic...
The back-error-propagation algorithm is effectively used for several purposes including its application to error functions (other than the sum of squared errors) and for the calculation of Jacobian and Hessian matrices. This entire process is adopted by each and every layer in the entire the ...
The fault current contribution from motors in the system is important. In many cases motors can contribute four to six times there normal full load current. Even if the current is for a very short duration, it is critical that it be included in the fault current calculation. When an arc ...
The complex fault computation is one of the important parts in power system calculation. This paper considers complex fault computation including short circuit and phase-broken fault at the same time. All parameters of power systems networks are stored in Microsoft Access. Complex fault computation us...
Transient currents (TCs) including transformer inrush, motor starting and fault currents cause mechanical, thermal and electrical stresses to the transformer windings and the power utility equipments. Of these, the inrush current suppression is crucial due to high second harmonic level, causing inadvert...
- 《Ieej Transactions on Power & Energy》 被引量: 4发表: 2002年 Analyses on the Mismatch of Protective Characteristics between Automatic Air-switch and Low-voltage Fuse Box Through the calculation of the short- circuit current of actual p ower distribution system, this paper makes comparative ...
This paper describes the character of small current grounding power system and analyzes the principle of fault line selection,then a criterion of fault line selection is constructed based on the principle of singularity detection of wavelet transform modular maximum.It proves that the method is able ...