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real power flow
相关语句
  有功潮流
     The transmission interface real power flow control based on N-1 static state safety restriction
     基于N-1静态安全约束的输电断面有功潮流控制
短句来源
     In the proposed strategy, the shunt converter of the UPFC controls the transmission line reactive power flow and the dc link capacitor voltage, and the series converter controls the transmission line real power flow and the UPFC bus voltage.
     在该策略中并联变换器控制 UPFC直流母线电压和输电线无功潮流,而串联变换器控制UPFC输入端母线电压幅值和输电线 有功潮流
短句来源
  “real power flow”译为未确定词的双语例句
     AN IMPROVED ALGORITHM OF OPTIMAL REAL POWER FLOW IN POWER SYSTEMS
     电力系统有功优化潮流的一种改进算法
短句来源
     OPTIMAL REAL POWER FLOW FOR POWER SYSTEM VIA EQUIVALENT QUADRATIC PROGRAMMING ALGORITHM
     电力系统有功优化潮流算法研究——等效二次规划法
短句来源
     OPTIMAL REAL POWER FLOW IN WIND POWER INTEGRATED SYSTEM
     含风电场电力系统的有功优化潮流
短句来源
     To overcome the difficulty in solving CCP problem, a genetic algorithm based on stochastic simulation technique is applied to calculate the wind power penetration limit and optimal real power flow.
     为了克服机会约束规划问题求解的困难,本文设计了基于随机模拟技术的遗传算法,计算风电穿透功率极限和风电并网系统的有功优化潮流。
短句来源
     The optimal real power flow is computed on the basis of the quasi-gradient vector by means of gradient method, conjugate gradient method and DPF method.
     并用算例用基于准梯度向量的准梯度法、准共轭梯度法和变尺度法求解有功优化潮流。
短句来源
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  相似匹配句对
     To be and to be real
     实在与真实
短句来源
     POWER
     清华的力量
短句来源
     On Power
     权力的概念、产生和制约
短句来源
     Generation of Polynomials With Real Power Roots
     一类以实数幂为根的多项式的生成
短句来源
     Real Time Measurement of Power Harmonic
     电网谐波的实时测量
短句来源
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  real power flow
Similarly, the quadrature component DUP influences the real power flow, hence subscript P.
      
Some important real power flow limits in systems today are the result of reactive power and reactive power reserve considerations.
      
On the other hand, these simulations establish the maximum real power flow allowed.
      
Instead, the coordination has taken place in the past through cooperative agreements about net real power flow exchanges between the control areas.
      


This paper presents an improved algorithm for optimal real power flow, which is based on the fact that the operation cost of power system is determined mainly by generation output. The objective function is the generation cost of whole power system. The constraints are bus power balance real power limits of generators and line real power limits. The gradient vector formula of augmentation objective function including generation cost and penalty function under the...

This paper presents an improved algorithm for optimal real power flow, which is based on the fact that the operation cost of power system is determined mainly by generation output. The objective function is the generation cost of whole power system. The constraints are bus power balance real power limits of generators and line real power limits. The gradient vector formula of augmentation objective function including generation cost and penalty function under the equality constraints is derived. After simplifying the gradient vector formula thc quasi-gradient vector formula is inferred according to the feature of power systems. The optimal real power flow is computed on the basis of the quasi-gradient vector by means of gradient method, conjugate gradient method and DPF method. Test resulus of three test systems (11 bus, 44 bus and 118 bus IEEE system) are presented, which show the new algorithm can not only satisfy the security constraints but also minimize generation cost. It can be employed in on-line optimal control and also in off-line computation for power system operation.

本文根据电力系统运行成本主要决定于发电机有功出力这个性质,提出了一个以全网发电成本为目标函数,节点功率平衡方程、发电机有功出力限值和支路有功限值为约束的新的优化潮流数学模型。推导出发电总成本加上惩罚项的增广目标函数等式约束下的梯度向量公式。并根据电力系统的特点对该公式进行了简化,得到准梯度向量公式。并用算例用基于准梯度向量的准梯度法、准共轭梯度法和变尺度法求解有功优化潮流。结果表明,该数学模型确实体现了影响成本的主要因素,能够得到既满足安全条件又使成本接近最小的优化潮流。对梯度向量公式的简化是合理的。三种解决都适合本数学模型。用此法求解有功优化潮流可用于在线最优控制,也适用于离线计算。

A novel algorithm for optimal real power flow is developed in this paper, which is based on the fact that the objective function is the generation cost of whole power system, simultaneously, the constraints are real power limits of generators, branch real power limits and real power balance. By virtue of the convex condition of cost function in quadratic programming(QP)model, the QP model with function constraints is trans formed into an equivalent QP model with...

A novel algorithm for optimal real power flow is developed in this paper, which is based on the fact that the objective function is the generation cost of whole power system, simultaneously, the constraints are real power limits of generators, branch real power limits and real power balance. By virtue of the convex condition of cost function in quadratic programming(QP)model, the QP model with function constraints is trans formed into an equivalent QP model with only variable constraints. Optimal real power flow via equivalent QP algorithm have been tested corresponding to 5 bus, 13 bus, IEEE-5 bus, IEEE-30 bus and Luoding power system(in Guangdong province, P.R.C.)respectively, on the microcomputer. For optimal real power flow, the testing results indicate that the equivalent QP algorithm has good convergency, fast speed and higer precision. It has great potentialities to apply in the on-line computation.

本文基于全网发电成本为目标、满足节点有功平衡方程、发电厂(机)有功出力和支路有功限值为约束的有功优化潮流数学模型,提出了利用二次规划的凸性条件,使其转化成只有变量约束的等效二次规划模型。本文用等效二次规划算法对5节点、13节点、IEEE 5节点、IEEE 30节点和广东某电力系统进行了计算。结果表明,用等效二次规划算法求解有功优化潮流具有收敛性好、快速及较高的精度,具有应用于在线的潜力。

Balance among real power, reactive power and voltage of the unified power flow controller (UPFC) system is analyzed. Two important conclusions related to UPFC are obtained. Firstly, it is found that the shunt converter provides all the required reactive power during the change of power flow if the UPFC bus voltage is constant. Secondly, the UPFC bus voltage can be controlled from both the sending side and the receiving side. Based on the analysis, a novel coordinated control strategy for UPFC is proposed. In...

Balance among real power, reactive power and voltage of the unified power flow controller (UPFC) system is analyzed. Two important conclusions related to UPFC are obtained. Firstly, it is found that the shunt converter provides all the required reactive power during the change of power flow if the UPFC bus voltage is constant. Secondly, the UPFC bus voltage can be controlled from both the sending side and the receiving side. Based on the analysis, a novel coordinated control strategy for UPFC is proposed. In the proposed strategy, the shunt converter of the UPFC controls the transmission line reactive power flow and the dc link capacitor voltage, and the series converter controls the transmission line real power flow and the UPFC bus voltage. The real/reactive power coordinated control in the UPFC control system can provide good performance during both transient and stable conditions. Experimental work has been carried out to verify the effectiveness of the proposed control strategy.

文中分析了统一潮流控制器(UPFC)系统的电压、无功功率和有功功率的平衡,得到了与 UPFC控制相关的2个重要结论。首先,分析表明在UPFC输入端电压保持不变的情况下,线路 无功潮流的变化实际上是由并联变换器提供的;其次,UPFC端电压既可以从发送端控制也可以从 接收端控制。基于以上分析,提出了一种新颖的UPFC控制策略。在该策略中并联变换器控制 UPFC直流母线电压和输电线无功潮流,而串联变换器控制UPFC输入端母线电压幅值和输电线 有功潮流。同时,在控制系统中加入有功/无功功率协调控制,可在潮流调节中获得良好的静态、动 态性能。最后,通过实验验证了所提出的控制策略的有效性。

 
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