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Synchronous inverter control system suitable for working condition of unbalanced power supply

A technology for synchronous inverters and power grid unbalance, which is applied in the directions of reducing the asymmetry of multi-phase networks, eliminating/reducing asymmetry in multi-phase networks, and adjusting the voltage of AC networks. , poor system flexibility, etc.

Active Publication Date: 2015-12-02
STATE GRID CORP OF CHINA +5
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  • Abstract
  • Description
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Problems solved by technology

In addition, the centralized large power grid power generation system cannot track the change of power load, and the flexibility of the system is relatively poor
If a power plant is built for a short peak load, it will cost a lot and the economic benefit is very low

Method used

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  • Synchronous inverter control system suitable for working condition of unbalanced power supply
  • Synchronous inverter control system suitable for working condition of unbalanced power supply
  • Synchronous inverter control system suitable for working condition of unbalanced power supply

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Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0042] figure 1 It is a system block diagram of an embodiment of the synchronous inverter control system suitable for unbalanced power grid conditions provided by the present invention, such as figure 1 As shown, it includes a power supply connected in sequence, a three-phase inverter main circuit, an LC filter circuit and a power grid, and also includes: a current acquisition module 101, a voltage acquisition module 102, a voltage signal processing module 103, a p...

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Abstract

The invention discloses a synchronous inverter control system suitable for a working condition of unbalanced power supply, comprising a power source, a three-phase inverter main circuit, an LC filter circuit and a power grid which are connected in sequence, and also comprising a current acquisition module, a voltage acquisition module, a voltage signal processing module, a power calculation module, a voltage reference signal amplitude calculation module, a voltage reference signal phase calculation module, a voltage reference signal generation module, a current loop reference signal generation module, a positive sequence modulating signal generation module and a modulation module. The synchronous inverter control system can realize the working of a synchronous inverter based on virtual synchronous machine control as core in the working condition of unbalanced power supply.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a synchronous inverter control system suitable for unbalanced grid conditions. Background technique [0002] With the rapid development of the national economy, people's demand for electricity is increasing, and the scale of the power grid and the capacity of long-distance transmission of electricity are constantly increasing. At this time, the defects of high cost, difficult operation, and low reliability of the centralized large power grid will become increasingly prominent with the expansion of the scale of the power grid, and it will be increasingly unable to meet people's requirements for the quality of power supply and the safety and reliability of power consumption. . In recent years, large-scale power outages caused by single-point faults in the power grid have occurred frequently, fully exposing the vulnerability of the large power grid system, and the reliabili...

Claims

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Application Information

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IPC IPC(8): H02J3/26H02J3/16
CPCY02E40/30Y02E40/50
Inventor 韦徵钟旭王彤宋飞周卫
Owner STATE GRID CORP OF CHINA
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