An rtu-based online control method for feeder voltage in active distribution network

A technology of active distribution network and feeder voltage, which is applied in the direction of AC network voltage adjustment, electrical components, circuit devices, etc., to meet the real-time requirements, the amount of calculation is small, and the data storage space is saved.

Active Publication Date: 2019-05-03
CHENGDU UNIV OF INFORMATION TECH
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  • Application Information

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Problems solved by technology

Each RTU can communicate bidirectionally with the feeder voltage master through the communication line

Method used

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  • An rtu-based online control method for feeder voltage in active distribution network
  • An rtu-based online control method for feeder voltage in active distribution network
  • An rtu-based online control method for feeder voltage in active distribution network

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Embodiment Construction

[0038] The design idea of ​​the present invention is: aiming at the main problems existing in the existing technical solutions, and using the characteristics of ADN having a relatively complete communication network and measurement system, an RTU-based feeder voltage online control method is proposed. The main characteristics of the method Because: 1) The data of renewable energy power generation and load forecasting are not required; 2) In addition to measuring local data, the new RTU also undertakes some simple calculations, which reduces the calculation amount of the main controller of the feeder voltage and improves the efficiency of control decision-making; 3) The voltage sensitivity calculation method based on the loop power flow method is adopted, which has a small amount of calculation and meets the real-time requirements of voltage online control; 4) The extreme value of the local voltage and the surrounding load node voltage is the control object, ensuring that the nod...

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Abstract

The invention provides an active distribution feeder voltage online control method based on a remote terminal unit (RTU), wherein each RTU is numbered in sequence. The local data of a corresponding node on a bus and the related calculation operation are performed parallel acquisition, then transferring the measured local node voltage and the estimated two voltage extremes to a feeder voltage master. Each RTU corresponds to a controllable reactive power source controller. The feeder voltage master establishes a reactive power control decision and a voltage control decision according to the received each RTU related data, and sends the decision command to the corresponding controllable reactive power source controller through the RTU. If communication fails, the power source controller will perform local control according to the local measurement data. The calculation method used in this active distribution feeder voltage online control method based on a RTU has the advantages of small computational amount and fast speed, satisfying the real-time requirement of the voltage on-line control, and ensuring that all the node voltage on the feeder line is within the allowable range.

Description

technical field [0001] The invention relates to the technical field of power distribution safety, in particular to an RTU-based online control method for feeder voltage of an active distribution network. Background technique [0002] Active distribution network (Active Distribution Network, ADN) is an advanced stage of the development of smart distribution network technology, through the use of advanced measurement, communication, power electronics and control The distribution network implements active management to solve problems such as grid compatibility and the application of large-scale intermittent renewable energy. [0003] The grid connection of large-scale intermittent energy sources (such as wind energy, solar energy, etc.) in the active distribution network will aggravate voltage fluctuations or cause them to be disconnected from the grid due to overvoltage, which not only seriously restricts the ability of the active distribution network to accommodate renewable ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16H02J3/18H02J13/00
CPCH02J3/16H02J3/1864H02J13/0017Y02E40/30Y02E40/70Y02E60/00Y04S10/00Y04S10/22
Inventor 庄慧敏张江林倪雨张绍全刘兴茂
Owner CHENGDU UNIV OF INFORMATION TECH
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