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Reactive voltage support capability evaluation method for multi-partition power grid

A voltage support and support capability technology, applied in AC network voltage adjustment, reactive power compensation, circuit devices, etc., can solve problems such as lack of effective data support, low accuracy of real-time data, and imperfect reactive power optimization methods, etc. Achieve the effects of easy optimization control, fast evaluation speed, and improved stability

Active Publication Date: 2020-08-11
JIANGSU ELECTRIC POWER CO
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  • 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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  • Reactive voltage support capability evaluation method for multi-partition power grid
  • Reactive voltage support capability evaluation method for multi-partition power grid
  • Reactive voltage support capability evaluation method for multi-partition power grid

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Embodiment 1

[0067] like figure 1 As shown, a method for evaluating the reactive power and voltage supporting capacity of the multi-regional power grid according to the present invention specifically includes the following steps:

[0068] Step 1: Select the evaluation index data of the reactive power supporting capacity of the multi-regional power grid;

[0069] The establishment of the evaluation data takes into account the characteristics of the overall structure of the 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 local reactive power balance and the mutual backup between grid partitions, the evaluation data has practical significance. The evaluation data include: the monitoring node voltage of the power grid, the tap position of the on-load tap changer in the zone, t...

Embodiment 2

[0123] 1) Regional grid evaluation data

[0124] figure 2 It is a 4-machine system diagram in IEEE 2 area, 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 tap changer in the zone, the reactive capacity in the zone, and the reactive capacity in the interconnected zone , the AVC system is based on the partitioned reactive power formulated after the global reactive power optimization. Calculate the above evaluation data according to formulas (1) to (6) to obtain the corresponding data value of the index. The data of the indicators to be evaluated are shown in Table 1.

[0125] Table 1 Evaluation data index value of two partitions

[0126]

[0127] 2) The index value corresponding to the reference data

[0128] According to the original reference data, the reference sample data can be obtained after calculating according to formulas (1) to (6) and...

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Abstract

The invention provides a reactive voltage support capability evaluation method for a multi-partition power grid. The method mainly comprises the following steps: selecting key evaluation index data ofthe reactive voltage support capability of the multi-partition power grid; establishing a multi-partition power grid reactive voltage support capability evaluation index system; performing fuzzy analysis on the to-be-evaluated data by applying a fuzzy membership function and a dynamic time warping algorithm, and calculating the similarity between the to-be-evaluated data after fuzzy processing and the reference sample; and determining the reactive voltage support capability of the multi-partition power grid according to the similarity between the to-be-evaluated data and the reference data. According to the method, an index system capable of accurately representing the reactive voltage supporting capacity of the multi-partition power grid is formulated, the fuzzy theory and the dynamic time warping algorithm are applied to power grid partition reactive voltage supporting capacity evaluation, the power grid partition reactive supporting capacity can be accurately evaluated, and data support is provided for a provincial dispatching AVC system.

Description

technical field [0001] The invention relates to the field of reactive power coordinated control of hierarchical and partitioned power grids, in particular to a method for evaluating reactive power and voltage support capabilities for multi-partitioned power grids. Background technique [0002] The grid layered partition technology is mainly to avoid the disadvantages brought by the electromagnetic ring network to the stability of the power system. The coordinated control of reactive power in hierarchical and partitioned power grids is mainly realized by the automatic voltage control system (AVC). The automatic voltage control system collects 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 control signals to various reactive power adjustment devices through remote devices. However, the system still has the problems of low accuracy of real-time...

Claims

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Application Information

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Patent Type & Authority Applications(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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