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Tie line power safety domain characterization method considering new energy uncertainty

A tie-line power and uncertainty technology, which is applied in the field of tie-line power safety domain characterization of new energy uncertainty, can solve the problems of inability to consider new energy uncertainty, inability to characterize transmission capacity, power transmission capacity, etc.

Pending Publication Date: 2020-06-05
CHONGQING UNIV
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Problems solved by technology

However, the existing security region description methods can only be described for the case of fixed new energy output (that is, the uncertainty of new energy cannot be considered).
At the same time, although the probability density function of the power transmission capacity or the upper and lower margins can be used to consider the uncertainty of new energy sources, the power transmission capacity still only provides the transmission capacity of a certain section of the boundary, and cannot represent the transmission capacity of any power transmission combination on the boundary. Complete evaluation of system power transmission capabilities

Method used

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  • Tie line power safety domain characterization method considering new energy uncertainty
  • Tie line power safety domain characterization method considering new energy uncertainty
  • Tie line power safety domain characterization method considering new energy uncertainty

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Experimental program
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Effect test

Embodiment 1

[0114] see figure 1 , a method for characterization of tie line power safety domains considering new energy uncertainties based on probability density functions, mainly includes the following steps:

[0115] 1) To establish constraints on tie-line power security considering the uncertainty of new energy sources, the main steps are as follows:

[0116] 1.1) Establish regional network power balance constraints, namely:

[0117] e G P G +e B P B +e R P R = e D P D (1)

[0118] In the formula, P G ,P B ,P R ,P D Represent power generation, tie-line power, renewable power and power demand, respectively. e G 、e B 、e R 、e D Respectively represent and P G ,P B ,P R ,P D The associated row vector.

[0119] 1.2) Establish the regional network generator capacity constraints, namely:

[0120] Power generation P G should not exceed the minimum output P G and maximum output which is

[0121]

[0122] In the formula, () represent the upper and lower limit...

Embodiment 2

[0193] The characterization method of tie-line power safety domain considering the uncertainty of new energy based on interval numbers mainly includes the following steps:

[0194] 1) Establish regional network constraints, namely:

[0195]

[0196]

[0197]

[0198]

[0199] In the formula, the new energy output is located in the interval middle. Lower limit of new energy output New energy output cap

[0200] 2) Build a joint linear programming model under all extreme renewable energy scenarios, namely:

[0201]

[0202]

[0203]

[0204]

[0205] s∈K(41)

[0206] In the formula, and are the renewable energy and power generation in the extreme case s. K is the set of all extreme cases. In extreme cases, it means the output of the i-th new energy station or

[0207] 3) Simplify formula (37) to formula (41) to obtain the joint linear simplified programming model under all extreme renewable energy scenarios, namely:

[0208]

[02...

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Abstract

The invention discloses a tie line power safety domain characterization method considering new energy uncertainty. The tie line power safety domain characterization method mainly comprises a tie linepower safety domain characterization method considering new energy uncertainty based on a probability density function and the tie line power safety domain characterization method considering new energy uncertainty based on an interval number. According to the method, the uncertainty of new energy can be fully considered, and the characterization precision of the joint line power safety domain isimproved.

Description

technical field [0001] The invention relates to the field of power system economic optimization calculation, in particular to a characterization method for tie-line power safety domain considering the uncertainty of new energy sources. Background technique [0002] The power safety domain of tie lines is crucial to the safe cross-regional consumption of new energy. With the large-scale integration of renewable energy into the grid, the uncertainty of the system increases sharply, so it is necessary to consider the uncertainty of renewable energy in the characterization of the power safety domain of tie-lines. However, the existing security region description methods can only be described for the case of fixed new energy output (that is, the uncertainty of new energy cannot be considered). At the same time, although the probability density function of the power transmission capacity or the upper and lower margins can be used to consider the uncertainty of new energy sources,...

Claims

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Application Information

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IPC IPC(8): H02J3/38
Inventor 杨知方林伟余娟龙嘉锐
Owner CHONGQING UNIV
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