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Wind-power-containing eclectic power system unit combination method considering voltage support

A unit combination and power system technology, applied in the power field, can solve problems such as adverse wind power fluctuations

Active Publication Date: 2017-07-14
RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology

The model proposed in this invention effectively reduces the risk of grid voltage exceeding the limit after large-scale wind power access, but it is a decision made on the premise that the power generation and load power are independent of the voltage level, which is conservative to a certain extent and is not conducive to wind power fluctuations consumption

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  • Wind-power-containing eclectic power system unit combination method considering voltage support

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Embodiment Construction

[0094] The present invention will be further described below in conjunction with accompanying drawing.

[0095] Such as figure 1 As shown in Fig. 1, a method for unit combination of power system including wind power considering voltage support, which specifically includes the following six steps:

[0096] (1) Given the technical parameters and cost coefficients of conventional generator sets, the technical and operating parameters of the power grid, the calculation parameters of the fluctuation range of system load and wind power;

[0097] (2) According to the relationship between system branch reactance and node branch, the system node injection transfer factor matrix is ​​formed, and its expression is:

[0098] ψ=B L A(A T B L A) -1 (1)

[0099] Among them, B L is the branch susceptance diagonal matrix, A is the node-branch association matrix, and the superscript "T" marks the transposition of the matrix; inject the element ψ in the transfer factor matrix ψ l,i Indi...

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Abstract

Disclosed is a wind-power-containing eclectic power system unit combination method considering voltage support. The wind-power-containing eclectic power system unit combination method comprises the following steps of setting fluctuation section ranges of technical parameters and cost coefficients, power grid technical and operating parameters, system loads and wind power of a conventional generator unit; forming a system node injection transfer factor matrix according to an association relation between system branch electric reactance and node branches; generating a random scene according to predicted precision and performing scene reduction; setting system operation allowable voltage upper and lower limit values, and load voltage characteristic parameters on nodes to establish a unit combination two-stage optimization model; selecting a complex variable based on a Benders decomposition algorithm, and decomposing the optimization model into a main problem and a sub problem; and performing alternative iteration on the main problem and the sub problem for solving. The wind-power-containing eclectic power system unit combination method can be used for joint decision making for start and stop states and base point power of the conventional generator junta in short-term operating dispatching of the electric power system.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a combination method for power system units including wind power that considers voltage support and is used for short-term operation scheduling of power systems. Background technique [0002] The purpose of the unit combination of the power system including wind power is to make the start-stop state of the conventional generator set and the allocation of reserve capacity in advance with the goal of system operation economy, so as to meet the expected load, wind power and its fluctuation needs. Under the new situation, as wind power is connected to the grid on a large scale, its inherent random fluctuation characteristics make the uncertainty of the power generation side increasingly prominent; as the traditional synchronous power generation gradually gives way to asynchronous power generation such as wind power, the system's The weakening of voltage support ability increa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/46H02J3/12
CPCH02J3/12H02J3/386H02J3/46H02J2203/20Y02E10/76
Inventor 孙东磊杨金洪李文博杨思刘晓明牛新生杨波王轶群杨扬
Owner RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER
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