Topic
Power-flow study
About: Power-flow study is a research topic. Over the lifetime, 8091 publications have been published within this topic receiving 155053 citations. The topic is also known as: load-flow study.
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TL;DR: A new power flow model allowing for multi-area AGC that achieves cooperation among the participating generators, which are deployed separately in the interconnected subarea networks is presented.
Abstract: In addition to maintaining the power balance, the major tasks of multi-area automatic generation control (AGC) involve regulating the power exchange among subareas. This study presents a new power flow model allowing for multi-area AGC that achieves cooperation among the participating generators, which are deployed separately in the interconnected subarea networks. The formulations of the power exchange among the subareas are derived from the active power flow equations of the tie-lines. The node parameters representing the level and allocation of the unbalanced power are introduced. Then, the proposed power flow model is established by integrating the formulations of the node power injection and power exchange. Meanwhile, the unknown variables in the integrated model can be synchronously adjusted by the Newton iteration method, which depends on the integrated Jacobian matrix. Furthermore, being improved based on the integrated formulations, some related algorithms, including but not limited to sensitivity analysis, are expected to produce more precise solutions. The case studies of the IEEE 5 bus test system, the IEEE RTS-1996 test system, and the IEEE 300 bus test system illustrate the convergence and efficiency of the proposed power flow method. Moreover, the case studies also demonstrate that the integrated formulations based sensitivity analysis can generate more reliable results.
35 citations
Patent•
24 May 2005
TL;DR: In this article, a power system is connected to a wind force power generating facility, a solar photovoltaic power generation facility and a power load load through a main bus bar and an auxiliary bus bar.
Abstract: PROBLEM TO BE SOLVED: To separate fluctuations in a load and a distributed power supply into frequency bands, enables a load following operation, and compensate a rapid load fluctuation and a power fluctuation hardly followed. SOLUTION: A power system 11 is connected to a wind force power generating facility 15, a solar photovoltaic power generating facility 16 as a natural energy power supply 10 and a power load 17 through a main bus bar 13 and an auxiliary bus bar 14. A total power calculating section 19 sums power from the natural energy power supply 10, and calculates the total power. The main bus bar 13 is connected to a power storage apparatus 22 comprising an engine power generator 21 and a secondary battery as the distributed power supply for implementing the load following operation through the auxiliary bus bar. A deviation between a load power detection value and a setting of power received by a system linking point is separated into a low frequency component and a high frequency component by a low pass filter 27. The engine power generator 21 is controlled by the low frequency component. The power storage apparatus 22 is controlled by the high frequency component. COPYRIGHT: (C)2007,JPO&INPIT
35 citations
TL;DR: In this article, a higher-order sandwich theory is implemented in conjunction with an equivalent mobility-based power flow progressive method to determine power flow for a sandwich configured floating raft vibration isolation system.
35 citations
TL;DR: The proposed method does not need to calculate partial derivatives and inverse Jacobian matrix and so has less computation time and is suitable for the radial and ill-conditioned networks that have higher values of R/X ratio.
35 citations
01 Jan 2004
TL;DR: In this paper, the slack bus in load flow solutions with uncertain nodal powers was investigated and two methods of dealing with these constraints were investigated suitable for implementation within the recently developed boundary load flow.
Abstract: This paper addresses the problem introduced by the slack bus in load flow solutions with uncertain nodal powers. While balancing powers in the system the slack bus will also absorb all uncertainty. The results obtained are of no practical interest unless realistic constraints are imposed on slack power production/consumption. Two methods of dealing with these constraints are investigated suitable for implementation within the recently developed boundary load flow.
34 citations