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Distributed power source and micro grid hybrid power supply system

A distributed power supply and power supply system technology, applied in the direction of AC network load balancing, single network parallel feeding arrangement, etc., can solve the problems of increased control difficulty, increased investment costs, increased energy storage, etc., and achieve high power supply reliability , strong structure and guaranteed reliability

Active Publication Date: 2016-08-10
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the construction of micro-grid requires a large amount of additional investment in energy storage, reactive power compensation, and control equipment, resulting in increased investment costs and increased control difficulties.

Method used

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  • Distributed power source and micro grid hybrid power supply system
  • Distributed power source and micro grid hybrid power supply system
  • Distributed power source and micro grid hybrid power supply system

Examples

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Embodiment 1

[0033] like Figure 1-7 As shown, the invention of this example proposes a hybrid power supply system of distributed power supply and microgrid; Some distributed power sources and loads are directly connected to the distribution network outside the microgrid, and some distributed power sources, loads and energy storage are located in the microgrid to form a microgrid and then connected to the grid. A unique wiring method is proposed through the design to make the power supply system The unique wiring mode is suitable for various working conditions such as faults and maintenance that may occur during the operation process. The operating mode can be converted according to the encountered working conditions, which is very flexible. For different working conditions, the typical operating modes are as follows:

[0034] Mode 1: normal operation

[0035] a. System characteristics: The distributed power supply outside the microgrid and the power supply inside the microgrid are joint...

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Abstract

The invention relates to a distributed power source and micro grid hybrid power supply system, comprising a distribution network to which a distributed power source and a load are connected, and a micro grid connected with the distribution network. The distributed power source and the load are configured outside the micro grid and directly connected to the distribution network. A distributed power source, a load and stored energy in a micro grid constitute a micro grid, which is then connected to a grid. The wiring mode of the power supply system adapts to possible working conditions such as failure and overhaul in the running process, and the running mode can be transformed according to the working condition and is very flexible. While taking into consideration high reliability and other advantages of power supply based on a micro grid, constraints such as cost of investment and control difficulty are considered, and an appropriate micro grid scale is maintained.

Description

Technical field: [0001] The invention relates to the field of power supply, and more specifically relates to a hybrid power supply system of a distributed power supply and a microgrid. Background technique: [0002] In recent years, the scale and capacity of distributed power sources such as wind power and photovoltaic power generation connected to the grid are gradually increasing, effectively improving the utilization efficiency of new energy, reducing environmental pollution, and increasing the transmission margin of the power transmission and distribution system. However, wind power and photovoltaic power generation are intermittent, random and volatile, and this uncertainty has caused a certain impact on the power grid. When the penetration rate of distributed power reaches a certain level, it will even further affect the safe and stable operation of the system. [0003] A microgrid is a small network composed of distributed power sources, loads, and energy storage. It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32
Inventor 盛万兴叶学顺刘科研孟晓丽吴鸣梁惠施贾东梨胡丽娟何开元
Owner STATE GRID CORP OF CHINA
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