Power network control methods and system, and devices

A technology of power network and control method, which is applied in the field of power, and can solve the problems of low utilization rate of production capacity equipment and large demand

Active Publication Date: 2016-12-21
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method, device, and system for controlling a power network, in order to improve the problem of low utilization rate of production equipment or grid-connected micro-grid in the prior art in order to meet the supply and demand balance of grid-connected micro-grid To solve the problem of large demand on the power grid, a new power network is provided, and a control scheme for micro-grid power in the power network is provided

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  • Power network control methods and system, and devices
  • Power network control methods and system, and devices
  • Power network control methods and system, and devices

Examples

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Effect test

Embodiment 1

[0092] An embodiment of the present invention provides a control method for the above electric power network, refer to Image 6 As shown, the specific steps include:

[0093] S601 (optional). The network scheduling device receives the real-time operating parameters of the microgrid sent by each microgrid control device in the microgrid group.

[0094] Wherein, the real-time operation parameters of the microgrid include: the real-time power parameters of the grid-connected point of the microgrid, and the power increase capability and power reduction capability of the microgrid. The real-time power parameters of the grid-connected point of the microgrid may include one or more of active power, reactive power, power factor, voltage and current of the grid-connected point of the microgrid. The real-time power parameter is used to calculate the real-time power value, and the real-time power value is the active power value of the grid-connected point of the microgrid. For example,...

Embodiment 2

[0112] This embodiment provides a method for controlling a power network, wherein the power network is the same as the above-mentioned power network.

[0113] The following are specific steps of a method for controlling a power network provided by an embodiment of the present invention, refer to Figure 7 .

[0114] S701 (optional): The micro-grid control device sends real-time operating parameters of the micro-grid controlled by the micro-grid control device to the network scheduling device.

[0115] example, with Figure 5 For example, at this time, the No. 1 micro-grid control device sends the real-time operating parameters of No. 1 micro-grid to the network scheduling device, the No. 2 micro-grid control device sends the real-time operating parameters of No. The device sends the real-time operating parameters of No. 3 microgrid to the network scheduling device.

[0116] Correspondingly, the network scheduling device can obtain the allowable power operation range of each...

Embodiment 3

[0164]An embodiment of the present invention provides a network scheduling device for use in a power network. The power network is the above-mentioned power network. The device can be software or hardware. The implementation of each functional module can refer to the first embodiment above. Here No longer. Such as Figure 10 As shown, the device includes:

[0165] The obtaining unit 101 is configured to obtain the allowed power operation interval of each microgrid in the microgrid group, and the power operation interval includes: the maximum reverse power parameter and the maximum forward power parameter of the grid-connected point of the microgrid;

[0166] The sending unit 102 is configured to send the allowed power operation range of each microgrid to the microgrid control device of the microgrid, so that the microgrid control device can control the real-time power of the grid-connected point of the microgrid to be within the specified range. within the allowable power op...

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Abstract

Embodiments of the present invention disclose power network control methods and system, and devices, relating to the field of electricity and aiming to solve a problem in the prior art that the use ratio of capacity equipment is low due to balance of supply and demand of a grid-tied micro-grid or the grid-tied micro-grid has a high demand for the power grid. A power network comprises N micro-grids. Each micro-grid is connected with at least one of the other micro-grids of the N micro-grids by using a contact line. The contact line is provided with a contact line switch. The N micro-grids are divided into M micro-grid groups. Micro-grids of each group are communicated with each other by using contact lines. Each micro-grid group is communicated with a power grid power supply line by using a point of common coupling (PCC). For each micro-grid group, a network scheduling device acquires a permitted power operating range of each micro-grid of the micro-grid group, and the permitted power operating range of each micro-grid is sent to a micro-grid control device of the micro-grids, so that the micro-grid control device controls a real-time power of a micro-grid tied point to be within the permitted power operating range.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a control method, device and system for a power network. Background technique [0002] Due to its high efficiency, cleanliness, and flexibility, distributed energy can complement traditional energy sources. Micro-grid, also known as micro-grid and micro-grid, is an important utilization method of distributed energy. It is a system mainly composed of load and production equipment (mainly including distributed power generation equipment). A microgrid can either be connected to an external grid or run in isolation. [0003] refer to figure 1 As shown, the microgrid running in parallel with the grid is a grid-connected microgrid, which is characterized by internal production equipment and loads, and the grid through a public connection point (also called a public connection point, which can be referred to as PCC: point of common coupling) connected. [0004] The grid-connected micro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32H02J3/06
CPCH02J3/06H02J3/32H02J3/38
Inventor 舒鹏刘梦琼李龙彬
Owner ENN SCI & TECH DEV
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