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An energy-feedback flexible power supply coordinated control system and control method

A coordinated control system and energy-feedback technology, applied in circuit devices, electrical components, AC network circuits, etc., can solve problems such as DC bus voltage fluctuations, improve rapidity, solve the problem of large fluctuations in DC bus voltage, and be simple to implement Effect

Active Publication Date: 2021-12-10
NR ELECTRIC CO LTD +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide an energy-feedback flexible power supply coordinated control system and control method, which can solve the problem of large fluctuations in the DC bus voltage while ensuring the rapidity of arc suppression of the flexible power supply, and improve the flexibility of the flexible power supply. Reliability and speed of operation

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  • An energy-feedback flexible power supply coordinated control system and control method
  • An energy-feedback flexible power supply coordinated control system and control method
  • An energy-feedback flexible power supply coordinated control system and control method

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0049] In the description of the present invention, it should be understood that the terms "first", "second" and so on are only used for descriptive purposes, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features . Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0050] Such as figure 1 The energy-feedback flexible power supply coordinated control system shown includes a front-stage three-phase PWM rectifier that is electrically connect...

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Abstract

The invention discloses an energy-feedback type flexible power supply coordination control system and a control method, including a front-stage three-phase PWM rectifier electrically connected to the power supply system on the AC side and a rear-stage unidirectional inverter electrically connected to the distribution network system on the AC side device, the DC side of the front stage three-phase PWM rectifier is interconnected with the DC side of the rear stage unidirectional inverter through a DC bus; it also includes a coordinate transformation unit, a power calculation unit, a first feedforward branch, and a front stage drive pulse A generating unit, a second feedforward branch and a subsequent driving pulse generating unit. Improve the rapidity of ground fault arc suppression through the AC voltage feedforward branch of the rear stage; through the active power feedforward branch between the front and rear stages, solve the problem of large fluctuations in the DC bus voltage at the moment the flexible power supply starts, and improve the response speed and operational reliability of the flexible power supply , which is simple to implement.

Description

technical field [0001] The invention relates to an energy-feedback flexible power supply coordination control system and a control method, belonging to the technical field of power electronic equipment application in power systems. Background technique [0002] With the rapid development of the urban distribution network, the power supply lines in the distribution network are increasing and lengthening year by year, and the capacitive current of the system to the ground becomes larger, resulting in a grounding arc when the system is single-phase grounded, which endangers personal safety. [0003] At present, flexible power supply has gradually become a research hotspot in the industry due to its advantages of speed, flexibility and precise arc suppression. [0004] The flexible power supply generally adopts the topological form of three-phase uncontrolled rectification at the front stage, single-phase inverter at the rear stage, or three-phase PWM rectification at the front ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36H02M7/219H02M7/5387
CPCH02J3/36H02M7/219H02M7/5387H02J2003/365Y02E60/60
Inventor 蒋顺平丁勇石祥建陶征刘为群
Owner NR ELECTRIC CO LTD
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