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Method for controlling section power based on tidal current pursuit and train rescheduling

A cross-sectional power and power flow tracking technology, which is applied in the direction of electrical program control, program control in sequence/logic controllers, electrical components, etc., can solve problems such as inability to realize large-scale power flow control, limited application range, and complex calculations

Inactive Publication Date: 2008-12-24
TIANJIN UNIV
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Problems solved by technology

In the traditional cross-section power flow control method, the sensitivity-based method [6-8] , the calculation process is simple, but it cannot achieve large-scale power flow control; and the control method based on the optimization process cannot be applied online due to the complexity of the calculation. [9，10] ; Although the use of FACTS equipment can effectively control the section flow [11，12] , but it is impossible to install FACTS equipment on all sections, thus limiting the scope of application of this method

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  • Method for controlling section power based on tidal current pursuit and train rescheduling
  • Method for controlling section power based on tidal current pursuit and train rescheduling
  • Method for controlling section power based on tidal current pursuit and train rescheduling

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Embodiment Construction

[0021] The present invention uses power flow tracking to carry out two-way tracking of the power flow adjustment amount on the control section to the power generation side and the load side, so as to determine the final control object and adjustment amount. In the following, the present invention will be further described in detail from several aspects in combination with the realization principle, drawings and embodiments of the present invention.

[0022] 1 branch trend tracking

[0023] Before performing branch power flow tracing, it is first necessary to move the loss and charging power of all branches to both ends of the branch, which is equivalent to the power injection of the corresponding nodes, so that the system can be transformed into a lossless network [12-16] , and assume that there is no self-circulation in the network.

[0024] For any branch L in the system i , the starting point is f, and the end point is t. We hope to change its upstream flow by ΔP through ...

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Abstract

The invention provides a cross-section power flow control method based on power flow tracing and generator re-dispatching. The method comprises the following steps: firstly, the power flow trace is used for tracing the cross-section regulating quantity to a generator bus used for outputting along the reverse direction of power flow, so as to ensure the power generation dispatching quantity on the power flow output side; then, the cross-section regulating quantity is traced to the influenced load bus along the power flow direction, and the influenced load quantity is reversely traced for the second time, so as to ensure the power generation variation quantity on the power receiving side. The method is realized only by changing the dispatching mode of a generator, the load supply is not influenced, the cross-section power flow is controlled within a large range, and the control error is small.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and relates to a section power flow control method. Background technique [0002] With the enhancement of people's awareness of environmental protection and the increasing concern for the economic benefits of power grids, the operation of modern power systems is increasingly approaching its stability limit, and various stability problems have become more prominent. In recent years, frequent blackouts around the world are examples. [1] , seeking effective control means to ensure the stable operation of the power grid has become a hot research direction of widespread concern. Regardless of whether the power system is in a normal state or an emergency failure occurs, operators often monitor the power flow of certain key sections to stabilize the system frequency, eliminate line congestion, optimize system operation, and increase regional transmission limits [2-5] etc. purpose. There...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02J13/00G05B19/04
CPCY02B90/20Y02E60/00Y04S10/20Y04S20/00
Inventor 贾宏杰余晓丹赵晶
Owner TIANJIN UNIV
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