Comprehensive optimization method for economy and static security of power system containing a UPFC

An optimization method and power system technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as safety impacts

Active Publication Date: 2018-01-19
SOUTHEAST UNIV +3
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Problems solved by technology

Therefore, the UPFC control mode will have an impact on the security of the system. The existing research on UPFC optimization is generally based on the UPFC constant power control mode,

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  • Comprehensive optimization method for economy and static security of power system containing a UPFC
  • Comprehensive optimization method for economy and static security of power system containing a UPFC
  • Comprehensive optimization method for economy and static security of power system containing a UPFC

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Embodiment Construction

[0071] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0072] The invention provides a power flow calculation method considering the UPFC control mode. Since the safety of the power system is prior to the economy, the invention adopts the method of dividing the optimization process into two layers, the inner layer optimizes the static security of the system, and the outer layer optimizes The system runs economically and constrains economically with security. The inner layer establishes the static safety evaluation index as the objective function, and considers the selection of the four control modes of UPFC at the same time; the outer layer uses the system operation cost and the penalty item generated by the inner objective function as the objective function. It is solved by particle swarm algorithm.

[0073] The invention as figure 1 As shown, a power flow calculation method considering the UPFC ...

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Abstract

The invention discloses a comprehensive optimization method for economy and static security of a power system containing a UPFC. The security of the system is superior to the operation economy of thesystem, so that the optimization process of the method is divided into inner and outer layers, the operation cost of the system is adopted by the outer layer as an objective function, an static security index of the system is adopted by the inner layer as the objective function, and the inner and outer objective functions are connected in a manner of adding a penalty term. N-1 static security constrains of the system are considered; and the UPFC has multiple power flow control modes and different modes have different responses when a security failure of the system occurs, so that selection ofthe control modes of the UPFC is throughout the whole optimization process. Solving is carried out by adopting a particle swarm algorithm, objective function values of the inner layer under differentcontrol modes of the UPFC are calculated for each generation of individuals and the optimal control parameter and control mode of the UPFC are selected, so that the calculation result shows that the operation economy and the static security of the system can be obviously improved by the method.

Description

technical field [0001] The invention relates to the field of power system safety and control, in particular to a comprehensive optimization method for economy and static safety of a power system containing UPFC. Background technique [0002] With the development of flexible AC transmission system (FACTS) technology, more and more power electronic transmission equipment has been applied to the power system, quietly changing the transmission mode of the traditional power system. Unified Power Flow Controller (UPFC) is a typical representative of FACTS equipment. It has the ability to control line flow, stabilize bus voltage, and improve system stability. It has powerful functions and provides a new control and adjustment method for the operation of power systems. At the same time, with the continuous development of the power system, the economy and safety of the power system are becoming more and more important. In order to make more reasonable use of the existing power transm...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/06
Inventor 吴熙殷天然高正平范子恺周正宇朱小龙洪莎莎王章轩
Owner SOUTHEAST UNIV
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