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Supervision device of wind-light integrated power generation system for automatically realizing voltage balance

A monitoring device and voltage balancing technology, applied in photovoltaic power generation, wind power generation, circuit devices, etc., can solve problems such as unfavorable system voltage stability, difficulty in power grid operation, etc., and achieve the effect of extending service life

Inactive Publication Date: 2016-02-17
STATE GRID CORP OF CHINA +1
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Problems solved by technology

At the same time, since the wind turbine is an asynchronous machine, if it is not controlled, it needs to absorb a certain amount of reactive power while generating active power, and does not use the voltage stability of the system
When the wind power penetration rate is low, these effects are not obvious. With the increase of the wind power penetration rate, the impact of wind energy on the power system gradually increases. difficulty

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  • Supervision device of wind-light integrated power generation system for automatically realizing voltage balance
  • Supervision device of wind-light integrated power generation system for automatically realizing voltage balance
  • Supervision device of wind-light integrated power generation system for automatically realizing voltage balance

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Embodiment Construction

[0030] figure 1 It shows a wind-solar integrated power generation system 10 that can automatically achieve voltage balance in the present invention. The microgrid 10 includes: wind power generation equipment 14, photovoltaic power generation equipment 12, energy storage system 13, SVG equipment 18, DC bus, AC / DC bidirectional converter module 1 16 for connecting and isolating the DC bus with the large power grid 20, AC / DC bidirectional converter module 2 15 for connecting photovoltaic power generation equipment 12 and DC bus, load 17 and monitoring in the microgrid device 11.

[0031] see figure 1 , the energy storage system 13 includes a battery module 131 and a bidirectional DC / DC converter 132 connected to the above-mentioned DC bus.

[0032] The monitoring device 11 includes: a photovoltaic power generation equipment monitoring module 114, used for real-time monitoring of the photovoltaic power generation equipment 12 in the battery energy storage system 10, and predicti...

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Abstract

The invention discloses a supervision device of a wind-light integrated power generation system for automatically realizing voltage balance. The supervision device can predict the power generation power of the wind-light integrated power generation system in the power generation system and load change in the micro grid, can track voltage information of the grid connection point of a big power grid, obtains a scheduling order of the big power grid, detects the battery capacitance of a storage battery module in real time, customizes and implements the most appropriate control strategy, guarantees the power generation system to participate the voltage regulation of the big power grid according to the requirement of the big power in the process of connecting the grid, and guarantees the stable voltage in the process of connected grid operation.

Description

Technical field [0001] The invention relates to a monitoring device of a wind-solar integrated power generation system capable of automatically realizing voltage balance. Background technique [0002] New energy power generation represented by wind energy and solar energy has attracted widespread attention from all over the world due to its advantages of pollution-free and renewable. However, the uncertainty and volatility of wind power and photovoltaic power generation have a certain impact on the stability of grid voltage. The randomness of active power output of photovoltaic power plants and the unfriendly characteristics of the grid also make the grid voltage unstable. [0003] As a supplement to the ultra-high voltage, long-distance, and large-grid power supply mode, the micro-grid based on wind power and photovoltaic power generation represents a new development direction of the power system. The driving force of wind turbines is wind energy. Due to the intermittent a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/16H02J3/32
CPCH02J3/16H02J3/32H02J3/385H02J3/386H02J3/388Y02E10/56Y02E10/76Y02E40/30
Inventor 鲁小鹏段卓华汪振东倪凯峰董亮何慧梅黄昌达陈晓云徐新宇艾尼瓦·克然木柏青姬彦君刘跃荣郭娟
Owner STATE GRID CORP OF CHINA
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