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Direct-current grid hierarchical control system and design method thereof

A layered control system and DC power grid technology, applied in the direction of DC network circuit devices, load balance in the DC network, electrical components, etc., can solve problems such as no control system, achieve clear structure, ensure safe and stable operation, and function clear effect

Active Publication Date: 2018-06-26
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is no control system design method for the DC power grid, and it is urgent to propose relevant methods to support the development of the DC power grid

Method used

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  • Direct-current grid hierarchical control system and design method thereof
  • Direct-current grid hierarchical control system and design method thereof
  • Direct-current grid hierarchical control system and design method thereof

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Embodiment

[0071] In this embodiment, the project of constructing the DC sending end power grid in the west of my country's prospect is taken as an example, and the technical solution of the present invention is further described in detail.

[0072] (1). DC grid modeling and power flow calculation:

[0073] Such as figure 2 The envisaged plan for the construction of the DC transmission power grid in the western part of my country is shown, and the length of interconnection lines between voltage source converter stations, network structure and parameter information of impedance, as well as the operating power data of converter stations are collected to establish a power flow calculation model for DC power grids. Execute DC grid power flow calculation to obtain the operating power of each DC line in the DC grid.

[0074] (2). Regional DC subnetwork division in DC power grid

[0075] in accordance with image 3 The concentrated distribution of the geographical locations of the voltage s...

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Abstract

The invention relates to a direct-current grid hierarchical control system and a design method thereof. The direct-current grid hierarchical control system comprises a direct-current grid overall coordinated control layer, a multi-convertor station coordinated control layer in regional direct-current sub-grids, and a voltage source converter station (VSC) body control layer which is connected withthe regional direct-current sub-grid coordinated control layer, wherein the multi-convertor station coordinated control layer is connected with the direct-current grid overall coordinated control layer; the direct-current grid overall coordinated control layer and the multi-convertor station coordinated control layer in the regional direct-current sub-grids adopt an active / standby control mode; and the control system also comprises a direct-current grid wide-area measurement system (WAMS) connected with the direct-current grid overall coordinated control layer and the multi-convertor stationcoordinated control layer in the regional direct-current sub-grids. According to the direct-current grid hierarchical control system and the design method thereof provided by the technical schemes ofthe invention, the converter station main body control layer, the sub-grid coordinated control layer and the overall grid control layer are adopted, so that the multi-level effective coordination andcooperation of the control functions of a direct-current grid can be realized. The control system has the advantages of clear structure and explicit functions, and can ensure the safe and stable operation of the direct-current grid.

Description

technical field [0001] The invention relates to control technology in the field of electric power systems, in particular to a layered control system and a design method for a DC power grid. Background technique [0002] my country's water energy resources, coal resources, and new energy sources such as photovoltaics and wind power are mainly concentrated in the northwest and southwest regions, with a long vertical distance between north and south and a wide area covering east and west. From the perspective of power supply characteristics, the difference in hydropower output during the high and low seasons, the fluctuation of new energy power power, and the adjustable capacity of thermal power have good complementarity; from the perspective of load characteristics, the load across multiple time zones has a large error. peak capacity. Therefore, the large-scale interconnection of the western power grid will give full play to the benefits of power mutual benefit and peak shift...

Claims

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Application Information

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IPC IPC(8): H02J1/00H02J1/14
CPCH02J1/00H02J1/14Y02E60/60
Inventor 郑超牛拴保李惠玲霍超吕思卓
Owner CHINA ELECTRIC POWER RES INST
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