Method for constructing safety domain model of flexible power distribution network

A technology of distribution network and security domain, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of randomness, intermittency, and volatility of renewable energy

Inactive Publication Date: 2018-01-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is most important to convert renewable energy into clean and conveniently transmitted electric energy, but at present, the power grid still faces m...

Method used

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  • Method for constructing safety domain model of flexible power distribution network
  • Method for constructing safety domain model of flexible power distribution network
  • Method for constructing safety domain model of flexible power distribution network

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0045] An embodiment of the present invention provides a method for constructing a security domain model of a flexible distribution network, see figure 1 , the method includes the following steps:

[0046] 101: Obtain the capacity constraints of the feeder section of the flexible distribution network under the N-0 security constraint, the capacity constraints of the main transformer, and the port regulation constraints of the flexible switching station;

[0047] 102: Obtain the capacity constraints of the feeder section of the flexible distribution network under the N-1 security constraint, the capacity constraints of the main transformer, and the port regulation constraints of the flexible switching station;

[0048] 103: Obtain the security domain model according to step 101 and step 102, and obtain the effective security boundary equation of the FDN security domain by equalizing the effective constraints in the security domain model.

[0049] To sum up, the embodiment of t...

Embodiment 2

[0051] The scheme in embodiment 1 is further introduced below in conjunction with specific calculation formulas and examples, see the following description for details:

[0052] 201: preparatory work;

[0053] In FDN, this method selects the node load in the feeder as the state variable instead of the feeder outlet load selected by TDN. The reasons are as follows: TDN closed-loop design is open-loop operation, and the power supply for a single load comes from only one power source. The power at the outlet of the feeder is equal to the load plus the network loss, which is approximately equal to the load. In order to be consistent with the actual situation of distribution network data collection and the habits of dispatchers, when studying TSC, distribution system security region (DSSR) and N-1 security, the feeder outlet (multi-connection part) is generally selected. is the power of the feeder section) as the state variable. In FDN flexible closed-loop operation, the load of ...

Embodiment 3

[0114] The following combined with specific examples, Figure 2-Figure 8 The scheme in embodiment 1 and 2 is carried out feasibility verification, see the following description for details:

[0115] 1. Basic situation of the example

[0116] figure 2 , 5 Middle: L i Indicates the equivalent load; L Fi is the power injected into FSS, L Fi is positive to indicate power from F i The side flows into the FSS, and vice versa. figure 2 , 5 The basic parameters of the calculation example are shown in Table 1.

[0117] Table 1 Basic parameters of single / multi-connection case

[0118]

[0119] Two, the implementation steps of the present invention

[0120] (1) Single contact calculation example

[0121] 1) Effective security constraints

[0122] The effective security constraints are obtained after removing invalid constraints from the security constraints of the single-connection case N-0 and N-1, as shown in Table 2.

[0123] Table 2 Effective security constraints of...

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Abstract

The invention discloses a method for constructing the safety domain model of a flexible power distribution network. The method comprises the following steps of 1) acquiring a full-network feeder linesegment capacity constraint, a main variable capacity constraint and a port adjustment amount constraint of a flexible switching station under the N-0 safety constraint of the flexible power distribution network; 2) acquiring a full-network feeder line segment capacity constraint, a main variable capacity constraint and a port adjustment amount constraint of the flexible switching station under the N-1 safety constraint of the flexible power distribution network; 3) according to the step 1) and the step 2), acquiring a safety domain model, and acquiring an equal sign of the effective constraint in the safety domain model, namely obtaining an effective safety boundary equation of the flexible power distribution network. According to the invention, based on the above steps, the safety domainmodel of the flexible power distribution network is given. Compared with a traditional power distribution network, a technical guidance is provided for the construction and development of the flexible power distribution network.

Description

technical field [0001] The invention relates to the field of intelligent distribution network planning, in particular to a method for constructing a security domain model of a flexible distribution network, and the invention is used for researching the security of a distribution network for power electronic technology transformation and upgrading. Background technique [0002] Human beings will pay close attention to future environmental pollution and energy issues. How to make good use of renewable energy (such as water energy, wind energy, solar energy, ocean energy, etc.) is a key factor in solving energy problems and environmental pollution. It is most important to convert renewable energy into clean and conveniently transmitted electric energy, but at present, the power grid still faces many problems in accepting renewable energy, mainly due to the characteristics of randomness, intermittent, and volatility of renewable energy itself. [1-2] . [0003] However, with the...

Claims

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Application Information

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IPC IPC(8): H04L12/24H02J3/00
Inventor 肖峻伊丽达刚发运王莹
Owner TIANJIN UNIV
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