A state estimation method and device for UHV flexible direct current transmission system

A flexible DC and power transmission system technology, applied in circuit devices, AC network circuits, information technology support systems, etc., can solve problems such as accuracy, data cannot be guaranteed, and data transmission to the station takes a certain amount of time to achieve the effect of ensuring functions.

Active Publication Date: 2021-11-09
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the UHV flexible direct current transmission system has begun to configure the distribution network phasor measurement unit, which can provide high-precision and synchronous measurement data, but it still takes a certain time to transmit the data from the station to the station, and the accuracy of the data cannot be guaranteed correct

Method used

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  • A state estimation method and device for UHV flexible direct current transmission system
  • A state estimation method and device for UHV flexible direct current transmission system
  • A state estimation method and device for UHV flexible direct current transmission system

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Embodiment Construction

[0023] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 As shown in Fig. 1, a method for state estimation of UHV flexible direct current transmission system mainly uses binary splitting regression path, and uses system parameter data to train and fit the function under the condition of including missing data, and establishes a state estimation method for UHV flexible direct current transmission system. Combined with the mathematical model, and the obtained function infers the current required state quantity, the overall operating state of the UHV flexible DC transmission system is obtained. The specific steps are as follows:

[0025] Step 1: Extract all parameter data that can evaluate the operating status of the UHV HVDC system under different control strategie...

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Abstract

The invention discloses a method for state estimation of UHV flexible direct current transmission system, comprising the following steps: Step 1: extracting all parameter data for evaluating the operating state of UHV flexible direct current transmission system; Step 2: constructing a data frame; Step 3: correcting missing The original parameter data is processed; Step 4: Amplify the training matrix; Step 5: Sampling, generate a specific decision-making path; Step 6: Remove the part that has not reached the convergence state, infer the required predicted value, and estimate the UHV flexible DC transmission system status. The present invention uses the known measurement data in the system to establish a mathematical model for estimating other unknown parameters and system status, and can obtain the system status more accurately according to the evaluation results, and perform power and voltage regulation purposefully and selectively. In the case of missing data of some measurement units, the system status can also be known more accurately, effectively preventing DC outages or equipment damage accidents caused by measurement failures.

Description

technical field [0001] The invention relates to the technical field of ultra-high voltage flexible direct current transmission, in particular to a state estimation method and device for an ultra-high voltage flexible direct current transmission system. Background technique [0002] The UHV flexible DC transmission technology tends to develop more and more towards multiple terminals, and a small change in one terminal may lead to changes in the operating characteristics of the entire DC transmission system. Therefore, in order to ensure the safe and reliable operation of the power grid, improve the transmission efficiency and quality, and precisely adjust and control the requirements, the UHV flexible DC transmission control management system needs to sense the operating status of the DC transmission system in real time to ensure that operators can grasp the operating conditions of the system, and then Make correct decisions when necessary and perform appropriate operations o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q10/067G06Q50/06H02J3/36H02J2203/20Y02E60/60Y04S10/50
Inventor 徐攀腾宋述波朱博李建勋杨学广李倩樊友平
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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