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Distributed power system state estimating method based on automatic differentiation technology

A technology of distributed power and system status, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as error-prone, cumbersome differential code work, etc.

Inactive Publication Date: 2012-07-04
HOHAI UNIV
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Problems solved by technology

The work of manually writing differential codes is too tedious and error-prone. The emergence of automatic differentiation (AD) technology overcomes this shortcoming. It is a completely new technology in the field of computer numerical calculation and analysis.

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  • Distributed power system state estimating method based on automatic differentiation technology
  • Distributed power system state estimating method based on automatic differentiation technology
  • Distributed power system state estimating method based on automatic differentiation technology

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Embodiment Construction

[0094] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0095] The real-time operation and control of the power system needs to understand the real operating conditions of the system. Due to reasons such as measurement and transmission, the raw data obtained inevitably have errors. State estimation can improve the accuracy of the data to a certain extent. Since F.C.Schweppe of the Massachusetts Institute of Technology and others proposed the most basic algorithm for state estimation of power systems in 1969, the basic weighted least squares (Weighted Least Squares WLS) state estimation algorithm, the weighted least squares method has become a power It is the most widely used algorithm in system state estimation. Its basic idea is to use the minimum sum of squares of the difference between the quantity measurement and the measurement estimated value as the target criterion for the estimation method. The invention consi...

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Abstract

The invention discloses a distributed power system state estimating method based on the automatic differentiation (AD) technology. The method comprises the following steps of: firstly, building a distributed generation (DG) model, connecting the DG model into a power grid, and building a distributed power system model in which distributed generation characteristics are considered; secondly, selecting a proper measurement equation of a state quantity building system in the system, and calculating and weighing the jacobian matrix in the least square state estimation algorithm by the AD technology; and finally, performing iterative computation to obtain the operation state of the distributed system and DG. The method is suitable for distributed power system state estimation. The operation characteristics of DG are considered, so the method is better suitable for the development tendency of the power grid; the AD technology substitutes the technology of manually writing differential codes to calculate the jacobian matrix, so the complexity and the possibility of error during a manually code writing process are reduced, truncation errors are effectively avoided, and the calculation precision and efficiency are improved; and the method is easily combined with the traditional state estimation software.

Description

technical field [0001] The invention relates to a distributed power system state estimation method based on automatic differentiation (AD) technology, which belongs to the technical field of power system operation and control. Background technique [0002] With the continuous development of smart grid technology and the access of a large number of distributed power sources, new requirements are put forward for the Energy Management System (EMS). The energy management system is a computer-based modern power dispatching automation system. The most fundamental change it brings is from the traditional empirical dispatching to the analytical dispatching, thereby improving the safety and economy of the power system operation. With the continuous expansion of the grid scale and the access of a large number of distributed power sources and new energy to the grid, the structure and operation mode of the power system are becoming increasingly complex, and the automation level of the p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 卫志农杨雄鞠平孙国强孙永辉韦延方袁阳陆子刚张伟陈凡刘玉娟潘春兰
Owner HOHAI UNIV
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