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Method for solving P-V curve based on continuous load flow calculation

A power flow calculation, P-V technology, applied in complex mathematical operations, AC network circuits, AC networks with the same frequency from different sources, etc. It can solve problems such as instability, rapidity and lack of integrity, and achieve reliable theoretical analysis. , the effect of speeding up the calculation speed and accuracy

Pending Publication Date: 2022-04-26
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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Problems solved by technology

However, this method is slightly insufficient in the rapidity and integrity of the calculation, and it is unstable when performing voltage stability margin analysis on large-scale power grids.

Method used

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  • Method for solving P-V curve based on continuous load flow calculation
  • Method for solving P-V curve based on continuous load flow calculation
  • Method for solving P-V curve based on continuous load flow calculation

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Embodiment Construction

[0060] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0061] A method for solving the P-V curve based on continuous power flow calculation, such as figure 1 shown, including the following steps:

[0062] Step 1: Construct the power system continuous flow method to solve the P-V curve parameter equation;

[0063] Step 1.1: Construct the calculation parameter equation of the continuum power flow method; the parameter equation of the algorithm and the correction process are different, and the step size control can also be changed.

[0064] The calculation parameter equation of the continuum power flow method is shown in the following formula:

[0065] f(x,λ)=g(x)+λb=0 (1)

[0066] In the formula, λ is the generator and load ...

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Abstract

The invention provides a method for solving a P-V curve based on continuous power flow calculation, and relates to the technical field of voltage stability of a power system. A power flow calculation model of an alternating current and direct current system is established by adopting nonlinear prediction and local parameterization to automatically adjust transformation parameters, the characteristics of nonlinearity, complexity and the like of a power flow equation are combined, a relatively simple Newton iteration method is used for solving the power flow equation, and the problem that a Jacobian matrix is singular at the limit of a conventional power flow equation is solved. The method is simple and easy to understand and has good convergence. Finally, examples prove that the method can improve the efficiency of analyzing the voltage stability by the continuous power flow method, and the effectiveness of the method is verified. Accuracy and calculation efficiency of continuation load flow calculation in solving the P-V curve are improved, actual critical voltage and limit power of the power grid are reflected more accurately, and the method is of great significance to safe and stable operation of the power grid.

Description

technical field [0001] The invention relates to the technical field of power system voltage stability, in particular to a method for solving P-V curves based on continuous power flow calculation. Background technique [0002] In recent years, with the development of the power system in the direction of large grid ultra-high voltage and long-distance power transmission, power dispatching has become more complex, making its stability problems more serious, and voltage collapse accidents occur frequently. These accidents have caused huge economic losses and social impact. And in the power market environment, due to the constraints of the environment, the cost of transmission routes and other factors, as well as the increasing degree of market competition, it is urgent to use the existing transmission network to transmit more power to minimize costs. All participants in the electricity market urgently need the transmission capacity information of the transmission network to gui...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/06G06F17/11
CPCH02J3/00H02J3/06G06F17/11H02J2203/10H02J2203/20
Inventor 孙俊杰陈俊池徐建源郝建成孙峰袁鹏王超曾辉贾祺刘宛崧李欣蔚张晓珩
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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