State estimation method and device for extra-high voltage flexible direct-current power 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 the inability to guarantee data, the transmission of data to the station requires a certain time, and the accuracy is correct.

Active Publication Date: 2021-03-23
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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  • Summary
  • Abstract
  • 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

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  • State estimation method and device for extra-high voltage flexible direct-current power transmission system
  • State estimation method and device for extra-high voltage flexible direct-current power transmission system
  • State estimation method and device for extra-high voltage flexible direct-current power 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 state estimation method for an extra-high voltage flexible direct-current power transmission system. The method comprises the following steps of: step 1, extracting all parameter data for evaluating the running state of the extra-high voltage flexible direct-current power transmission system; 2, constructing a data framework; 3, processing missing original parameter data;4, amplifying a training matrix; 5, performing sampling to generate a specific decision path; and 6, removing a part which does not reach a convergence state, deducing a required prediction value, and estimating the state of the extra-high voltage flexible direct current power transmission system. According to the method, a mathematical model for estimating other unknown parameters and system states is established by utilizing known in-system measurement data, the system states can be acquired more accurately according to an evaluation result, power and voltage regulation and control are performed purposefully and selectively, the system states can be accurately obtained even under the condition that part of measurement unit data is lost; and direct current outage or equipment damage accidents caused by measurement faults can be effectively prevented.

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 & AuthorityApplications(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
OwnerGUANGZHOU BUREAU CSG EHV POWER TRANSMISSION