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Multi-region coordinated automatic off-network control strategy and device

A control strategy and multi-area technology, applied to circuit devices, AC networks with different sources of the same frequency, AC network circuits, etc., can solve the problems of insufficient control strategy, insufficient backup, low-frequency suspension, etc.

Pending Publication Date: 2022-04-15
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the above existing technologies, the purpose of the present invention is to provide a multi-region coordinated automatic off-network control strategy and device to effectively solve the possible backup shortage and stable control strategy after large-scale new energy access Low-frequency suspension problems caused by inadequate prevention and control

Method used

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  • Multi-region coordinated automatic off-network control strategy and device
  • Multi-region coordinated automatic off-network control strategy and device
  • Multi-region coordinated automatic off-network control strategy and device

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Embodiment

[0063] image 3 It is a flowchart of an embodiment of the present invention. In this embodiment, a multi-region coordinated automatic off-network control strategy, the process is as follows:

[0064] Step 1, count the total load shedding of virtual power plants in each region, and sort them according to the importance of load, acceptable power outage frequency, etc., and then divide them into 5 rounds of action sequences according to the amount of action set in each round by scheduling;

[0065] Step 2. Each virtual power plant monitors the fundamental frequency of the voltage at the installation point in real time through the low-frequency off-grid device, and calculates the deviation of the fundamental frequency. The calculation formula is

[0066]

[0067] in, is the fundamental frequency deviation of installation point k at time t, f 0 is the standard frequency of the fundamental wave, generally 50Hz, is the measured value of the fundamental frequency of node k at...

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Abstract

The invention discloses a multi-region coordinated automatic off-network control strategy and device. The control strategy comprises the following steps: S1, dividing virtual power plants in each region into different load shedding rounds; s2, each virtual power plant monitors the voltage fundamental frequency of the installation point in real time through a low-frequency off-network device, and the fundamental frequency deviation value of the installation point at the current moment is obtained according to the monitored voltage fundamental frequency of the installation point; and S3, according to the fundamental wave frequency deviation value obtained by each virtual power plant and the round sequence of each virtual power plant, carrying out round-by-round constraint on the action behavior of each virtual power plant.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a multi-area coordinated automatic off-grid control strategy and device. Background technique [0002] With the gradual increase in the proportion of new energy access, its randomness and volatility pose new challenges to the safe and stable operation of the power system, especially in terms of frequency stability. [0003] The existing power system’s solutions to the problem of frequency drop caused by power shortage mainly include primary and secondary frequency modulation, DC FLC (Frequency Limit Controller, frequency limiter) and other automatic adjustment control devices, stable control load shedding, low-frequency load shedding device action, etc. to increase the frequency. After large-scale new energy access, the uncertainty of new energy may have insufficient backup or insufficient control strategy, resulting in the problem of low system frequency, and the interrup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/06H02J3/24
CPCY04S20/222Y02B70/3225
Inventor 吴小珊吴为周保荣
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD