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Method for calculating direct current access capability of receiving end power grid with consideration of multiple constraints

A receiving-end power grid and access capability technology, applied in computing, electrical components, electrical digital data processing, etc., can solve problems that cannot fully meet the requirements of power grid operation control

Active Publication Date: 2015-11-11
NARI TECH CO LTD +1
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Problems solved by technology

The patent "A Calculation Method for DC Power Receiving Scale of AC Receiving-End Power Grid" (application number CN201410104305.7) proposes a calculation method for DC power receiving scale of AC receiving-end power grid, which only considers the constraints of DC multi-infeed short-circuit ratio , cannot fully meet the grid operation control requirements

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  • Method for calculating direct current access capability of receiving end power grid with consideration of multiple constraints
  • Method for calculating direct current access capability of receiving end power grid with consideration of multiple constraints
  • Method for calculating direct current access capability of receiving end power grid with consideration of multiple constraints

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Embodiment Construction

[0044] The present invention will be described in further detail below with reference to the accompanying drawings.

[0045] figure 1 The description in step 1 is based on a certain grid structure, where M DCs have been connected, and the capacity of each DC is P d,i (i=1,2,...,M), forming a typical operation mode, in which the connected M direct currents transmit power at full capacity, and determine the set of alternative direct current drop points according to the site conditions of the substation and power balance, assuming that there are a total of N available DC drop points;

[0046] figure 1 In step 2, it is described that according to the short-circuit capacity of each alternative DC drop point and the degree of interaction between each DC in a typical way, the newly added DC access point is determined, and the initial capacity of the newly connected DC is recorded as P new (P new It is related to the DC voltage level, ±500kV is generally 3000MW, ±800kV is generall...

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Abstract

The invention discloses a method for calculating direct current access capability of a receiving end power grid with consideration of multiple constraints, belonging to the technical field of electric power system and automation thereof. The method for calculating direct current access capability of a receiving end power grid with consideration of multiple constraints comprises: determining an alternative direct current drop point set according to the station address condition of a transformer station, electric power balance and the like; determining newly increased direct current access drop points according to the short circuit capacity of each alternative direct current drop point in the typical mode and the interaction degree between each direct current in the typical mode; and giving the direct current access capability of a receiving end power grid through iteration after integrated consideration of multiple constraints comprising the direct current multi-infeed short circuit ratio, the power grid low ebb peak load regulation capacity, the relative moment of inertia index, the N-1 transient stability and the like. The method for calculating direct current access capability of a receiving end power grid with consideration of multiple constraints is beneficial to guidance of a power grid planning department about reasonable planning of the direct current drop points of the receiving end power grid, and can give the reasonable level for the direct current access capability of the receiving end power grid and reduce the blindness for direct current construction, and can improve the power grid operation control level.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a method for calculating the direct current access capability of a receiving-end power grid considering multiple constraints. Background technique [0002] Due to its unique advantages, high-voltage direct current (HVDC) transmission has become an important form of domestic large-scale interconnection and long-distance large-capacity transmission, and has played an important role in optimizing the allocation of large-scale resources in my country. With the continuous development and construction of the power grid, it is inevitable that multiple DC transmission lines will be placed on the same AC receiving end grid. Both the Southern Power Grid and the East China Power Grid have developed into typical DC multi-infeed receiving end grids, and the DC infeed capacity continues to grow. [0003] In order to better guide the...

Claims

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Application Information

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IPC IPC(8): H02J5/00G06F19/00
Inventor 李兆伟翟海宝刘福锁李建华李威黄志龙李碧君周霞崔晓丹侯玉强
Owner NARI TECH CO LTD
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