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Sequential quantitative analysis method for operational flexibility of active distribution system

A power distribution system, quantitative analysis technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of lack of flexibility evaluation methods for power distribution systems

Active Publication Date: 2019-11-05
TIANJIN UNIV
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Problems solved by technology

In terms of application scenarios, the quantitative analysis is mainly aimed at the flexibility of a single period of time, and the timing analysis of operational flexibility is still in its infancy; in terms of evaluation methods, the existing evaluation methods mainly use the index of insufficient flexibility to describe the degree of imbalance between supply and demand of the power distribution system. Lack of flexible evaluation methods for distribution system oriented to flexible operation
Therefore, there is an urgent need for a time-sequence quantitative analysis method of operational flexibility for flexible, efficient, and safe operation of power distribution systems to solve the problem of quantitative operational flexibility of active power distribution systems with high penetration of distributed power sources.

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  • Sequential quantitative analysis method for operational flexibility of active distribution system
  • Sequential quantitative analysis method for operational flexibility of active distribution system
  • Sequential quantitative analysis method for operational flexibility of active distribution system

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specific Embodiment

[0044] For this embodiment, first input the impedance value of the line element in the IEEE 33 node system, the active power and reactive power of the load element, and the network topology connection relationship, its structure is as follows figure 2 As shown in Table 1 and Table 2 for detailed parameters; set up two controllable resource access points, node 15 is connected to an energy storage system with a capacity of 3MVA, and node 16 is connected to a static var compensator with a capacity of 1Mvar; consider For the high-penetration access of distributed power sources, 6 groups of distributed power sources are respectively connected to nodes 12, 14, 16, 18, 20, and 22, with a capacity of 0.4MVA; considering that the lines close to the source nodes in the power distribution system have For larger transmission capacity, the setting of the upper limit of line transmission capacity is shown in Table 3; the minimum value of node voltage is set to 0.9p.u., the maximum value of ...

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Abstract

The invention provides a sequential quantitative analysis method for operational flexibility of an active distribution system. The sequential quantitative analysis method comprises the steps: inputting the selected structure and parameters of a radially operating active distribution system; calculating the sequential power flow of the system without considering the regulation of controllable resources and obtaining the initial operation state of the distribution system in each period of time; establishing the sequential representation of node flexibility based on a node power model for nodes;considering the topological connection relation of the distribution network and establishing a flexible sequential analysis model; obtaining a set of sequential operation strategies of the controllable resources of each node in each period of time; and calculating the quantified operation flexibility of the distribution system in each period of time. The regulation function of the controllable resources can be fully exerted to be adaptive to the high permeability access of the distributed power supply, the sequential quantitative expression of the node flexibility and the sequential analysis method of the distribution system flexibility are comprehensively considered and an evaluation method of the operation flexibility of the active distribution system is obtained.

Description

technical field [0001] The invention relates to a quantitative analysis method for the operating flexibility of a power distribution system. In particular, it relates to a timing quantitative analysis method for the operational flexibility of an active power distribution system. Background technique [0002] As distributed generators (Distributed Generators, DGs) are widely connected to the power distribution system, the power distribution system is gradually transformed into an active power distribution system with functions of power collection, transmission, storage and distribution. In the active power distribution system, the uncertain load demand on the user side and the frequent fluctuation of distributed power output further increase the uncertainty of the power distribution system. In actual operation, in order to cope with a wide variety of operating requirements and operating scenarios, the active power distribution system must have the ability to coordinate flexi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 王成山王玥珑李鹏冀浩然于浩宋关羽赵金利
Owner TIANJIN UNIV
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