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Voltage regulation and control method and system for extra-high voltage AC/DC hybrid power grid delivery system

A technology of AC-DC hybrid connection and voltage regulation, which is applied in the direction of AC network circuits, power transmission AC networks, circuit devices, etc., can solve the problem of insufficient depth of theoretical research, inability to ensure comprehensiveness, and impact on the operation safety of UHV AC-DC transmission systems, etc. question

Pending Publication Date: 2022-05-10
ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the AC/DC hybrid transmission system, whether the DC channel is blocked or the AC channel is faulty, it will have a great impact on the AC system voltage.
Involving AC system and DC system, power flow distribution, start-up mode, etc., there are many influencing factors. The current v

Method used

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  • Voltage regulation and control method and system for extra-high voltage AC/DC hybrid power grid delivery system
  • Voltage regulation and control method and system for extra-high voltage AC/DC hybrid power grid delivery system
  • Voltage regulation and control method and system for extra-high voltage AC/DC hybrid power grid delivery system

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Effect test

Embodiment 1

[0034] In the technical solutions disclosed in one or more embodiments, such as figure 1 As shown, the voltage regulation method of the external transmission system of the UHV AC-DC hybrid grid includes the following steps:

[0035] Step 1. Obtain the circuit parameters of the transmission line, and identify the impact of DC channel and AC channel faults on AC voltage fluctuations;

[0036] Step 2. According to the identification result, set the influence weight of DC channel and AC channel faults on AC voltage fluctuation;

[0037] Step 3. Set the magnitude of voltage regulation according to the influence weight, so that the voltage of the AC / DC hybrid grid system is within the set range when a fault occurs.

[0038] In this embodiment, by identifying the impact of DC channel and AC channel failures on AC voltage fluctuations, the voltage can be regulated in a targeted manner, so that the voltage is within the required range, and the system voltage will not be insufficient d...

Embodiment 2

[0097] Based on Embodiment 1, this embodiment provides a voltage control system for the external transmission system of the UHV AC-DC hybrid power grid, including:

[0098] Identification module: configured to obtain the circuit parameters of the transmission line, and identify the impact of DC channel and AC channel faults on AC voltage fluctuations;

[0099] Influence weight setting module: configured to set the influence weight of DC channel and AC channel faults on AC voltage fluctuations according to the identification results;

[0100] An adjustment module: configured to set the range of voltage regulation according to the influence weight, so that the voltage of the AC / DC hybrid grid system is within the set range when a fault occurs. Example 3

Embodiment 3

[0101] This embodiment provides an electronic device, including a memory, a processor, and computer instructions stored in the memory and run on the processor. When the computer instructions are executed by the processor, the steps described in the method in Embodiment 1 are completed.

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Abstract

The invention provides a voltage regulation and control method and system for an extra-high voltage AC/DC hybrid power grid delivery system, and the method comprises the following steps: obtaining circuit parameters of a power transmission line, and identifying the influence of a DC channel and an AC channel fault on AC voltage fluctuation; according to the identification result, setting the influence weight of the direct current channel and the alternating current channel fault on the alternating current voltage fluctuation; and setting the amplitude of voltage regulation and control according to the influence weight so as to enable the voltage to be within a set range when the alternating-current and direct-current hybrid power grid system breaks down. By identifying the influence of the direct current channel and the alternating current channel fault on the alternating current voltage fluctuation, the voltage can be regulated and controlled in a targeted manner, so that the voltage is in a required range, and the situation that the power transmission efficiency of an extra-high voltage system is affected due to insufficient system voltage caused by the influence of the fault is avoided.

Description

technical field [0001] The present disclosure relates to the technical field related to UHV power transmission control, and specifically relates to a voltage regulation method and system for an UHV AC / DC hybrid grid external transmission system. Background technique [0002] The power system connects power production and consumption, is the central link of energy transformation, and is one of the main battlefields to achieve the goal of carbon neutrality. my country has a vast territory, and the distribution of energy resources and consumption is reversed. 76% of coal is distributed in the north and northwest, 80% of wind energy is distributed in the northern region of the west, 80% of water energy is distributed in the southwest, and 70% of solar energy resources are mainly distributed in the west. And the northern region, my country's electricity load is mainly distributed in the economically developed eastern coastal areas. Energy resources and electricity loads are distr...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/36H02J3/18
CPCH02J3/381H02J3/36H02J3/18
Inventor 王俊芳杨朋威任正郑博文陈肖璐窦宇宇王新宇陈财福张爽赵振宇
Owner ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER
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