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Synchronous disturbance curve-based island detection method of multi-machine system

A multi-machine system, curve technology, applied in photovoltaic power generation, AC network circuits, electrical components, etc., can solve problems such as incomplete synchronization, affecting system power generation, etc.

Active Publication Date: 2018-08-24
HANGZHOU COMFIRMWARE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the system is running, incomplete synchronization occurs from time to time, which seriously affects the power generation of the system; the present invention solves such problems

Method used

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  • Synchronous disturbance curve-based island detection method of multi-machine system
  • Synchronous disturbance curve-based island detection method of multi-machine system
  • Synchronous disturbance curve-based island detection method of multi-machine system

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Embodiment Construction

[0054] The present invention will be specifically introduced below in conjunction with specific embodiments.

[0055]A method for detecting islands in a multi-machine system based on a synchronous disturbance curve, comprising the following steps:

[0056] Step 1: Inject the disturbance value of each photovoltaic power generation system in the form of a curve, the curve changes according to a sinusoidal curve, and the amplitude of the disturbance value is compensated by δ%;

[0057] Step 2: After the photovoltaic power generation system is started, report the working status to the host computer; if the communication is normal, wait for the synchronization of the host computer; if the communication is not normal, start the power generation normally;

[0058] As an embodiment, the specific process of generating the synchronization signal is: the host computer detects the total power generation P 总 , according to the work situation reported by the lower computer, set P i It is ...

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Abstract

The invention discloses a synchronous disturbance curve-based island detection method of a multi-machine system. By the method, the curve shape is not changed after each disturbance curve is superposed, the change of a disturbance value is completed by compensated, the change of a phase is forecasted, so that the disturbance characteristic can be effectively controlled, subsequent detection is consistent, the system still can normally work under an out-of-step condition, and stable and continuous power generation is ensured. By employing the scheme, the synchronous requirement is reduced, thedisturbance can be effectively controlled, and the characteristics, except initial phase, an output curve all can be detected.

Description

technical field [0001] The invention relates to the field of power generation systems, in particular to a multi-machine high-performance anti-islanding reactive power disturbance system. Background technique [0002] In high-performance situation detection, the output state is changed by adding disturbances, and the environmental changes are judged according to the characteristics of the disturbance curve and the output curve. In a single system, it is easy to know the characteristics of the disturbance, but in a multi-machine system, if the disturbance curve is changed if it is not synchronized, the control of the curve characteristics will be lost, and the judgment of the change of the environmental situation will be lost. The high-performance anti-islanding reactive power disturbance also has the above-mentioned problems in the multi-generator power generation system, and the possibility of loss of function must be considered. [0003] In the multi-machine high-performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/40
CPCH02J3/383H02J3/388H02J3/40Y02E10/56
Inventor 马保华陈旭东
Owner HANGZHOU COMFIRMWARE TECH CO LTD