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Phase modifier configuration method and device for improving power transmission capacity of new energy high-duty-ratio power grid

A technology of power transmission capacity and configuration method, applied in photovoltaic power generation, single grid parallel feeding arrangement, reactive power adjustment/elimination/compensation, etc. effect of ability

Active Publication Date: 2021-04-16
NARI TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: in order to overcome the above-mentioned shortcomings, a method and device for configuring a power regulator that enhances the power transmission capacity of a high proportion of new energy grid are proposed, which solves the problem of inaccurate configuration location and configuration capacity of the power regulator

Method used

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  • Phase modifier configuration method and device for improving power transmission capacity of new energy high-duty-ratio power grid

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Experimental program
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Effect test

Embodiment 1

[0039] like figure 1 As shown in , a method for configuring a condenser to improve the power transmission capacity of a power grid with a high proportion of new energy, including steps:

[0040] Step 1. Obtain the key fault F and its safety control strategy information of the key transmission section of the new energy grid with a high proportion constrained by the steady-state voltage offset;

[0041] Step 2. According to the typical operation mode of the high proportion new energy grid and the safety control strategy information, the key fault F is simulated to calculate the voltage of each bus in the system after the safety control measures are taken into account. According to the statistical results of the voltage offset, the voltage offset is from Select m buses A from large to small 1 、A 2 …A m As a candidate installation point for the condenser;

[0042] The voltage offset is obtained by subtracting the corresponding voltage limit from the bus voltage after the fault...

Embodiment 2

[0051] A camera configuration device for improving the power transmission capacity of a grid with a high proportion of new energy sources, including:

[0052] The information acquisition module is used to acquire the key faults and safety control strategy information of the key transmission sections of the new energy grid with a high proportion constrained by the steady-state voltage offset;

[0053] The candidate installation point calculation module is used to determine the candidate installation point of the condenser through simulation calculation according to the key fault and its safety control strategy information;

[0054] The optimal configuration location calculation module is used to determine the optimal configuration location of the condenser based on the candidate installation points;

[0055] The optimal installation capacity calculation module is used to calculate the increase in the power transmission capacity of key sections when the condensers of different c...

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Abstract

The invention discloses a phase modifier configuration method and device for improving the power transmission capacity of a new energy high-duty-ratio power grid. The method comprises the steps that: key faults and safety control strategies of a high-duty-ratio new energy power grid key power transmission section constrained by steady-state voltage deviation are acquired; m buses are selected as candidate installation points of a phase modifier from large to small according to the voltage deviation of each bus after the fault; a bus with the maximum key section power transmission capacity improvement amount after the same-capacity phase modifier is mounted is selected as an optimal configuration point of the phase modifier; the lifting amount of the phase modifier with different capacities when the phase modifier is mounted at the optimal configuration point is calculated; and the optimal installation capacity and the optimal configuration point of the phase modifier are finally determined according to the comprehensive power transmission capacity improvement amount and the performance cost ratio index of the phase modifier capacity. According to the invention, the power transmission capability of the AC tie line is effectively improved, the local economic development is promoted, the efficiency-cost ratio of the mounted phase modifier is optimized, and the operation benefit of power grid equipment is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof, and specifically relates to a method and device for configuring a phase controller for improving the power transmission capacity of a power grid with a high proportion of new energy. Background technique [0002] In order to cope with environmental pollution, climate change, and ensure the sustainable development of the economy and society, more and more renewable energy sources such as wind power and photovoltaics are connected to the power system. Running brings new challenges. Since new energy units do not have the ability to regulate voltage, as the proportion of new energy continues to increase, the ability to regulate the voltage of the power grid gradually declines. For a high proportion of new energy power grid, when a serious AC or DC fault occurs, a large number of machine cuts and load shedding are adopted. After the measures are taken, it will ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/38H02J3/46
CPCY02E40/30
Inventor 常海军罗峰张钢刘福锁柯贤波王超霍超孙仲卿李威黄畅想朱玲王玉孙震宇李兆伟
Owner NARI TECH CO LTD
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