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Active splitting section determination method of multi-direct-current feed-in receiving end power grid

A multi-DC feed-in and receiving-end power grid technology, applied in the power grid field, can solve problems such as insufficient optimality of results, and achieve the effects of facilitating system recovery, improving optimality of results, and reducing risks

Pending Publication Date: 2022-04-29
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for determining the active decoupling section of the multi-DC feed-in receiving end power grid, so as to alleviate the technical problem of insufficient optimality of the results of the existing active decoupling section search method

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  • Active splitting section determination method of multi-direct-current feed-in receiving end power grid
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  • Active splitting section determination method of multi-direct-current feed-in receiving end power grid

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[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. the embodiment. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0038] The terms "including" and "having" mentioned in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes other unlisted steps or units, or optionally ...

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Abstract

The invention provides an active splitting section determination method for a multi-direct-current feed-in receiving end power grid, relates to the technical field of power grids, and solves the technical problem that the result optimality of an existing active splitting section search method cannot be guaranteed. The method comprises the following steps: acquiring active power required by a load at a load node in the receiving-end power grid; an objective function of an active splitting process is determined based on the active power, and the objective function is used for representing that load power supply can be maintained to be maximized after active splitting of the power grid is implemented due to faults; determining a constraint condition of a multi-infeed short-circuit ratio of the receiving-end power grid, the constraint condition being used for representing a supporting capability of a grid frame of the receiving-end power grid to a commutation voltage of a DC system; and performing linearization processing based on the objective function and the constraint condition to obtain an active splitting section determination result of the receiving-end power grid.

Description

technical field [0001] The present application relates to the technical field of power grids, in particular to a method for determining the section of an active disconnection of a multi-DC feed-in receiving end power grid. Background technique [0002] At present, as an important measure of the third line of defense in the power system, active decoupling is to split the power grid into two or more isolated sub-branches when the structural integrity cannot be guaranteed after a major disturbance. The system is an effective means to prevent the further expansion of the accident, and the selection of the optimal disassembly section is the core and key. [0003] By implementing active decoupling operations on correct and reasonable sections, it can effectively block the transition from single faults to cascading faults, greatly reducing the risk of long-term large-scale power outages or even system crashes. For the multi-infeed system, DC will inevitably be included in the sub-...

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Application Information

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IPC IPC(8): H02J3/24H02J3/38G06Q10/04G06Q50/06G06F30/20
CPCH02J3/24H02J3/38G06Q10/04G06Q50/06G06F30/20Y02E40/70Y04S10/50Y02E60/60
Inventor 李少岩曹珂
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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