A reactive power and voltage support capability evaluation method for multi-partition power grid

A voltage support, multi-partition technology, applied in the direction of AC network voltage adjustment, reactive power compensation, circuit devices, etc., can solve the problems of lack of effective data support, incomplete reactive power optimization methods, and low real-time data accuracy, etc. Easy to optimize control, evaluate fast, suppress the effect of pathological bending

Active Publication Date: 2022-07-08
JIANGSU ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the system still has the problems of low accuracy of real-time data, imperfect reactive power optimization method, and lack of effective data support.

Method used

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  • A reactive power and voltage support capability evaluation method for multi-partition power grid
  • A reactive power and voltage support capability evaluation method for multi-partition power grid
  • A reactive power and voltage support capability evaluation method for multi-partition power grid

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Embodiment 1

[0066] like figure 1 As shown, the method for evaluating the reactive power and voltage support capability for a multi-zone power grid according to the present invention specifically includes the following steps:

[0067] Step 1: Select the evaluation index data of the reactive power and voltage support capacity of the multi-zone power grid;

[0068] The establishment of the evaluation data takes into account the characteristics of the overall architecture of the power grid layered and partitioned, the relationship between the AVC subsystems at all levels, and the control of the AVC reactive power coordination and optimization closed-loop system. In view of the close relationship between voltage and reactive power, the principle of reactive power on-site balance and the mutual backup between grid partitions, the evaluation data has practical significance for evaluating the reactive power and voltage support capacity of grid partitions. The evaluation data includes: the monito...

Embodiment example 2

[0121] 1) Subregional power grid assessment data

[0122] figure 2 It is a 4-machine system diagram of IEEE2 zone, and the evaluation data is extracted from the power monitoring system and AVC system, including: the monitoring node voltage of the power grid, the tap position of the on-load voltage regulating transformer in the zone, the reactive power capacity in the zone, and the reactive power capacity of the interconnected zone. , the AVC system is based on the partition reactive power formulated after the global reactive power optimization. The data values ​​corresponding to the indicators can be obtained by calculating the above evaluation data according to formulas (1) to (6). The data of the indicators to be evaluated are shown in Table 1.

[0123] Table 1 Two-partition evaluation data index values

[0124]

[0125] 2) The index value corresponding to the reference data

[0126] According to the original reference data, according to formulas (1) to (6), and afte...

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Abstract

The invention provides a reactive power and voltage support capability evaluation method for a multi-partition power grid. The main steps include selecting key evaluation index data of the reactive power and voltage support capability of the multi-partition power grid; establishing an evaluation index system for the reactive power and voltage support capability of the multi-partition power grid; using Fuzzy membership function and dynamic time warping algorithm perform fuzzy analysis on the data to be evaluated, and calculate the similarity between the data to be evaluated and the reference sample after fuzzy processing; determine the reactive power and voltage support of the multi-partition power grid according to the similarity between the data to be evaluated and the reference data ability. The invention formulates an index system that can accurately characterize the reactive power and voltage support capability of a multi-partition power grid, and applies the fuzzy theory and dynamic time warping algorithm to the evaluation of the reactive power and voltage support capability of the power grid partition, which can accurately evaluate the reactive power support capability of the power grid partition. The provincial adjustment AVC system provides data support.

Description

technical field [0001] The invention relates to the field of layered and partitioned reactive power coordination control of power grids, in particular to a reactive power and voltage support capability evaluation method for multi-zoned power grids. Background technique [0002] The power grid layered partition technology is mainly to avoid the drawbacks brought by the electromagnetic ring network to the stability of the power system. The layered and partitioned reactive power coordination control of the power grid is mainly realized by the automatic voltage control system (AVC). The automatic voltage control system collects the power grid operation data in real time through the data acquisition and monitoring control system, then optimizes the voltage and reactive power from a global perspective, and sends the control signal to each reactive power regulating device through the remote device. However, the system still has the problems of low accuracy of real-time data, imper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCH02J3/16H02J2203/20Y02E40/30
Inventor 管益斌周挺徐贤罗凯明李海峰刘盛松刘林
Owner JIANGSU ELECTRIC POWER CO
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