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Off-grid wind storage load power generation system and control debugging method

A debugging method and power generation system technology, applied in the direction of AC network voltage adjustment, AC network load balancing, single-network parallel feeding arrangement, etc., can solve problems such as unstable system operation, overvoltage at the fan end, etc., and relieve power supply tension , the effect of avoiding overvoltage problems

Active Publication Date: 2022-07-29
CHINA ELECTRIC POWER RES INST
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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 to provide an off-grid wind storage load power generation system and a control debugging method to solve the problem of long-distance The existence of power cables can easily cause overvoltage at the fan end, resulting in technical problems of unstable system operation

Method used

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  • Off-grid wind storage load power generation system and control debugging method

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Embodiment 1

[0049] see figure 1 As shown, the present invention provides an off-grid wind load storage power generation system, including: a wind power generation branch, an energy storage branch, an active load and a circuit breaker K2; the wind power generation branch includes a wind generator 100; the energy storage branch Including various types of hybrid energy storage systems;

[0050] The wind power generation branch and the circuit breaker K2 are connected in series with the energy storage branch and the active load in parallel, and then connected to the high-voltage bus 200 .

[0051] The hybrid energy storage system includes a voltage source type energy storage system 300 and a current source type energy storage system 400 .

[0052] Further, the wind power generation branch further includes a circuit breaker K1, a converter 101, a box-type transformer T1 and a wind turbine grid-connected cable 500;

[0053] The circuit breaker K1 and the converter 101 are connected in paralle...

Embodiment 2

[0066] The present invention also provides a control and debugging method for the off-grid wind load storage power generation system, comprising the following steps:

[0067] S1. The control circuit breaker K2 is disconnected, the energy storage branch is put into operation, and a part of the active load is put into operation, at this time, an off-grid load storage system is formed;

[0068] S2, control the circuit breaker K2 to close, the wind turbine 100 starts to work; control the output power of the energy storage branch with the reactive power at the output end of the energy storage branch as the command, and the stator voltage of the wind turbine 100 and the external voltage of the fan start Synchronized and reach the preset grid connection conditions, at this time, an off-grid wind load storage system is formed;

[0069] S3. The wind turbine 100 outputs active power according to a given power ramp, and gradually puts in an active load during the active power ramping pro...

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Abstract

The invention discloses an off-grid wind storage load power generation system and a control debugging method. The off-grid wind storage load power generation system comprises a wind power generation branch with a wind power generator, an energy storage branch, an active load and a circuit breaker, the wind power generation branch and the circuit breaker are connected in series, then are connected in parallel with the energy storage branch and the active load, and then are connected to the high-voltage bus. According to the method, firstly, a circuit breaker is controlled to be switched off, an energy storage branch is switched on, and a part of active load is switched on; the control circuit breaker is closed, and the wind driven generator starts to work; the reactive power of the output end of the energy storage branch is used as an instruction to control the output power of the energy storage branch, the stator voltage of the wind driven generator and the external voltage of the fan start to be synchronized, and preset grid connection conditions are met; the wind driven generator climbs according to the given power and outputs the active power, and in the active climbing process of the wind driven generator, the active load is gradually input. By controlling the power of the fan and the energy storage, when the starting inductive load is insufficient in the networking process, the overvoltage problem caused by a long cable can be avoided, and stable operation of the system is facilitated.

Description

technical field [0001] The invention belongs to the technical field of wind power generation and energy storage, and in particular relates to an off-grid wind load storage power generation system and a control and debugging method. Background technique [0002] In recent years, with the global energy shortage and environmental problems caused by traditional power generation becoming more and more prominent, wind power generation has developed rapidly with its mature technology and commercialization potential. The off-grid wind power generation system can operate independently without the support of a large power grid to supply power to its surroundings, which is of great significance for alleviating the shortage of power supply. However, wind power generation is fluctuating and random. Wind speed fluctuations will cause corresponding fluctuations in the output power of wind turbines. Therefore, wind power generation cannot provide continuous and stable power, and the stabili...

Claims

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Application Information

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IPC IPC(8): H02J3/50H02J3/48H02J3/24H02J3/16H02J3/14H02J3/28
CPCH02J3/381H02J3/388H02J3/50H02J3/48H02J3/241H02J3/16H02J3/14H02J3/28H02J2300/28H02J2310/60Y02E10/76
Inventor 李相俊李焓宁董立志贾学翠王上行惠东刘家亮
Owner CHINA ELECTRIC POWER RES INST
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