A Distributed State Estimation Method for Main Distribution Network Integration Based on Two-Stage Method
A technology of state estimation and main distribution network, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems of reducing the amount of calculation, estimating dimensionality disaster, etc., to reduce the amount of calculation, widely used, and improve operational reliability Effect
Active Publication Date: 2022-04-05
CHINA ELECTRIC POWER RES INST +2
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[0008] In view of this, the present invention provides a method for estimating the integrated distributed state of the main distribution network based on the two-stage method, which reduces the amount of calculation and effectively and accurately solves the The integrated state estimates the problem of dimension disaster, and can obtain the consistent and accurate real-time state of the main distribution network, and provide basic data for the analysis and calculation of the main distribution network integration, thereby improving the operational reliability of the main distribution network integration
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[0090] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0091] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0092] Terms and Definitions:
[0093] 1) State estimation: State estimation is also called filtering. It uses the redundancy of the real-time measurement system to improve data accuracy, elim...
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The invention relates to a method for estimating a distributed state of an integrated main distribution network based on a two-stage method. The method includes: establishing a state estimation model for an integrated main distribution network; decoupling the distribution network model of the integrated state estimation model for a main distribution network Several subsystems; establish the linear relationship between the state quantities of the main distribution network before decoupling and the state quantities in the subsystems after decoupling; independently perform state estimation on the subsystems after decoupling in a distributed manner; use the main distribution network before and after decoupling The linear relationship of the state quantities is a measurement equation, and a state estimation model is established for state estimation to obtain the integrated state of the main distribution network. The method proposed by the invention reduces the amount of calculation, effectively and accurately solves the problem of the dimensionality disaster of the integrated state estimation of the main distribution network caused by the large scale of the distribution network, and can obtain a consistent and accurate real-time state of the main distribution network , to provide basic data for the analysis and calculation of the integration of the main distribution network, thereby improving the operational reliability of the integration of the main distribution network.
Description
technical field [0001] The invention relates to the field of distribution automation, in particular to a method for estimating a distributed state of an integrated main distribution network based on a two-stage method. Background technique [0002] The combination of distributed power and conventional power will be the development trend of the power system. The access of a large number of distributed power has changed the characteristics of the distribution network. Based on the boundary equivalent, the main network and the distribution network are independently operated, analyzed and controlled. The method is no longer applicable, and it is necessary to consider the overall integration of the main distribution network and conduct an integrated analysis of the main distribution network. [0003] Distributed state estimation makes use of the characteristics of the state estimation algorithm itself that can be divided into regions to perform state estimation in each region, an...
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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 王少芳郎燕生赵昆李理宋旭日王淼罗雅迪王春宁
Owner CHINA ELECTRIC POWER RES INST