Distributed state estimation calculation method based on centralized control station scheduling main station
A technology for state estimation and scheduling of master stations, which can be used in computing, special data processing applications, instruments, etc., and can solve problems such as poor convergence and low numerical stability.
Active Publication Date: 2012-06-27
NARI TECH CO LTD +1
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[0006] In order to solve the problems of high dimensionality, low numerical stability and poor convergence that traditional centralized state estimation faces when the power grid structure exceeds a certain scale, the present invention provides a method that can not only significantly improve the calculation speed of state estimation but also significantly improve the Distributed state estimation calculation method based on centralized control station dispatching master station for state estimation calculation accuracy
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[0030] The present invention will be further described below in conjunction with the accompanying drawings.
[0031] 1. Acquisition of multi-source measurement information.
[0032] The present invention can obtain real-time measurement data from the energy management system (EMS) of the centralized control station, and the measurement information obtained online includes the measurement of the three-phase current amplitude of the branch, the active power measurement of the branch, and the non-active power of the branch. Power measurement, three-phase current amplitude measurement through the switch, active power measurement through the switch, reactive power measurement through the switch, three-phase voltage amplitude measurement at each node, PMU measurement, switch remote signaling status;
[0033] 2. Consistency check of measurement information.
[0034] The invention discloses a method for processing the measurement information of each factory station in the centralize...
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The invention discloses a distributed state estimation calculation method based on a centralized control station scheduling main station, belonging to the power system calculation field. The method is characterized by comprising the following steps: (1) acquisition of multi-source measurement information; (2) measurement information consistency examination; (3) multiregional distributed state estimation calculation; (4) identification of a suspected substation in a centralized control station; (5) secondary state estimation calculation based on a suspected substation detailed model. According to the invention, problems of high dimension, low value stability and poor convergence faced by traditional centralized state estimation when an electrical network structure exceeds a certain scale are solved, the invention provides the distributed state estimation calculation method based on the centralized control station scheduling main station, and the method can obviously raise a calculation speed of state estimation and can substantially raise calculation precision of the state estimation.
Description
technical field [0001] The invention belongs to the field of power system calculation, and more precisely relates to a distributed state estimation calculation method applied to a dispatching master station of a centralized control station. Background technique [0002] The research of state estimation algorithm is directly related to the speed and precision of state estimation calculation. With the continuous expansion of the scale of the power system, more and more factors are considered. The number of power network state equations established by traditional centralized state estimation is huge and the order is very high. Even if many advanced technologies and high-performance computers are used, The traditional centralized state estimation still presents the problem of dimensionality disaster such as insufficient computer memory and slow convergence speed, which cannot meet the real-time requirements. However, the safe and stable operation of the power system urgently re...
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Login to View More IPC IPC(8): H02J13/00G06F17/50
CPCY04S40/128Y02E60/76Y02B90/2669Y04S40/22Y02B90/20
Inventor 於益军冯树海高宗和戴则梅刘俊石飞王礼文王毅
Owner NARI TECH CO LTD