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Recursive cutting type zone control method of reactive voltage

A technology of voltage partitioning and control method, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as poor adaptability of interconnected power grids

Inactive Publication Date: 2014-01-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a recursive cutting type reactive voltage partition control method in order to solve the problem of poor adaptability when the existing reactive voltage partition control method is used in an interconnected grid with uneven grid structure

Method used

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  • Recursive cutting type zone control method of reactive voltage
  • Recursive cutting type zone control method of reactive voltage
  • Recursive cutting type zone control method of reactive voltage

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specific Embodiment approach 1

[0016] Specific implementation mode 1. Combination figure 1 Describe this implementation mode, a recursive cutting-type reactive voltage partition control method described in this implementation mode, the specific steps of the method are:

[0017] Step 1. Calculate the power node coupling relationship matrix and the voltage control sensitivity matrix H of the source node to the load node LG ;

[0018] Step 2. According to the power node coupling degree matrix Using the binary cutting partition algorithm, the power supply nodes in the area to be divided are divided into two groups whose coupling degree within the group is greater than γ(k), and the coupling degree between groups is less than γ(k), which are respectively the power supply node set S k1 and power node set S k2 ; The k is the number of partitions;

[0019] Step 3: Call the voltage control sensitivity matrix H of the power node to the load node LG , map and merge all the load nodes in the area to be divided ...

specific Embodiment approach 2

[0023] Specific embodiment 2. This embodiment is a further description of a recursive cutting-type reactive power voltage partition control method described in specific embodiment 1. In step 1, the power node coupling relationship matrix is ​​calculated. and the voltage control sensitivity matrix H of the source node to the load node LG The method is:

[0024] According to Kirchhoff's law, the node voltage equation is obtained:

[0025] V · G V · L = Z GG Z GL ...

specific Embodiment approach 3

[0047] Specific Embodiment 3. This embodiment is a further description of a recursive cutting-type reactive voltage partition control method described in specific embodiment 1. In step 2, according to the coupling degree of the power supply node, the two-part partition algorithm is used to divide the The power supply nodes in the area are divided into two groups with strong coupling within the group and weak coupling between groups:

[0048] Step 21, for the matrix Take the absolute value of the upper triangular element of , and store it in the array β according to the order of the absolute value of each element from small to large;

[0049] Step 22, take the matrix The minimum value of the modulus of each row element, and store it in a temporary array α 1 , find out the difference between β and α 1 The element β(c) corresponding to the maximum value of the array element; the c is the cth element in the array β;

[0050] Step 23. Compare the matrices in turn The modulu...

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Abstract

The invention discloses a recursive cutting type zone control method of reactive voltage, belongs to the field of electrical power system safety analysis and operation control, and particularly relates to a node coupling relationship analysis and reactive voltage zone control method of an electrical power system. The problem that when the zone control method of the reactive voltage is applied to interconnected grids with non-uniform grid structures, the adaptability is poor is solved. The method comprises the steps as follows: a power supply node coupling relationship matrix and a voltage control sensitivity matrix HLG of power supply nodes to load nodes are calculated firstly; power supply nodes in a to-be-cut zone is divided into two groups, wherein one group has an intra-group coupling degree lager than Gamma (k), and the other group has an inter-group coupling degree smaller than Gamma (k); load nodes in the to-be-cut zone are merged into node sets of corresponding power supply nodes; whether sub-zones of the node sets meet the termination conditions of the sub-zones is judged, and if the termination conditions are met, the partition of nodes and sets is ended; then grid voltage of the zones is controlled, and operation control of the grid voltage of the zones is completed; otherwise, partition is performed continuously. The recursive cutting type zone control method of the reactive voltage is applicable to electrical power system safety analysis and operation control.

Description

technical field [0001] The invention belongs to the field of power system safety analysis and operation control, and in particular relates to the analysis of node coupling relationship of the power system and a reactive voltage partition control method. Background technique [0002] Reactive power and voltage control is an important guarantee and measure to ensure the safe operation of the power grid. With the rapid increase of wind power penetration and long-distance transmission, the problem of reactive power and voltage in the power system is more prominent. Since the concept and method of hierarchical voltage control was proposed in the 1970s and 1980s, it has received more attention and application. Since the problem of reactive power and voltage has regional and local characteristics, the core task of implementing hierarchical voltage control is how to effectively partition the power grid according to the needs of voltage control. [0003] The fundamental task of powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 李卫星齐士伟牟晓明杨溢
Owner HARBIN INST OF TECH
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