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Power network, and control method, device and system thereof

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

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

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a power network and its control method, device and system, 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 In order to solve the problem of the large demand of the power grid on the power grid, a new power network is provided, and a control scheme for the power of the micro-grid in the power network is provided

Method used

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  • Power network, and control method, device and system thereof
  • Power network, and control method, device and system thereof

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Embodiment 1

[0059] In the prior art, a single grid-connected microgrid operates independently, but due to the restriction that the power of the PCC point is not allowed to flow from the primary microgrid to the grid, the power generation of the power generation equipment of the microgrid is limited, or a large increase is required Energy storage equipment. This approach will deviate from the actual needs of the microgrid, or increase the investment and operating costs of the microgrid. Therefore, in the embodiment of the present invention, a new type of power network is provided in order to solve the above-mentioned problems. reference figure 2 In this new power network, the embodiment of the present invention connects multiple microgrids with tie lines to form a joint grid-connected microgrid. When multiple microgrids operate jointly, energy is produced and consumed between the microgrids. Different laws will form a complementary network effect. It should be noted that for the convenie...

Embodiment 2

[0088] The embodiment of the present invention provides a control method for the above-mentioned power network, refer to Image 6 As shown, the specific steps include:

[0089] 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.

[0090] Among them, the real-time operating parameters of the microgrid include: the real-time power parameters of the grid-connected point of the microgrid, and the power increase and power reduction capabilities of the microgrid. The real-time power parameters of the grid-connected point of the microgrid may include one or more of the 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 microgrid connection point. For example, if the real-tim...

Embodiment 3

[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 the specific steps of a method for controlling a power network provided by an embodiment of the present invention, refer to Figure 7 . The execution subject of each step may be a piconet control device.

[0114] S701 (optional). The microgrid control device sends the real-time operating parameters of the microgrid controlled by the microgrid control device to the network dispatching device.

[0115] By way of example Figure 5 As an example, at this time, the No. 1 piconet control device sends the real-time operating parameters of the No. 1 piconet to the network dispatching device, the No. 2 piconet control device sends the real-time operating parameters of the No. 2 piconet to the network dispatching device, and the No. 3 piconet controls The device sends the real-time operating parameters of the 3rd micro...

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Abstract

An embodiment of the invention discloses a power network, and a control method, devices and a control system of the power network, which relate to the field of power, and used for solving the problem of low utilization efficiency of energy production equipment caused by the purpose of satisfying balance between supply and demand of a grid-connected microgrid or the problem of great demand of the grid-connected microgrid for power grids in the prior art. The control method adopts N microgrids, wherein each microgrid comprises a first bus and a second bus which are connected through voltage transformation equipment, and the first bus is used for connecting energy production equipment and a load; the second bus in each microgrid is connected with the second bus of at least one other microgrid of the N microgrids through a connecting line, the connecting line is provided with a connecting line switch, and the connecting line switch is used for controlling the connected microgrids to connect or disconnect; and the N microgrids are divided into M microgrid groups, the microgrids in each group are connected through the connecting lines, each microgrid group is connected with a power grid power supply line through a public connection point PCC, and the first bus of at least one microgrid in the N microgrids is connected with a charging pile.

Description

Technical field [0001] The present invention relates to the field of electric power, in particular to a power network and its control method, device and system. Background technique [0002] Distributed energy can complement each other with traditional energy methods due to its high efficiency, cleanliness and flexibility. Micro-grid (micro-grid, microgrid), also known as micro-grid, micro-grid, is an important utilization method of distributed energy. It is a system mainly composed of load and capacity equipment (mainly including distributed power generation equipment). . The microgrid can operate in parallel with the external power grid or in isolation. [0003] reference figure 1 As shown, the microgrid connected to the grid is a grid-connected microgrid, which is characterized by internal capacity equipment and loads, and is connected to the grid through a common connection point (also called a public connection point, which can be referred to as PCC: point of commoncoupling)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/32H02J3/38
Inventor 舒鹏扈杰郝亚强
Owner ENN SCI & TECH DEV
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