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Hyperbolic Cosine Type Maximum Exponential Absolute Value Robust Estimation Method for Power System State

A hyperbolic cosine and power system technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve problems such as estimation performance needs to be improved, and achieve the effects of good engineering application prospects, high computing efficiency, and good tolerance

Active Publication Date: 2018-07-31
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the estimation performance of these robust state estimation methods still needs to be improved.

Method used

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  • Hyperbolic Cosine Type Maximum Exponential Absolute Value Robust Estimation Method for Power System State
  • Hyperbolic Cosine Type Maximum Exponential Absolute Value Robust Estimation Method for Power System State
  • Hyperbolic Cosine Type Maximum Exponential Absolute Value Robust Estimation Method for Power System State

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Embodiment Construction

[0031] The present invention proposes a hyperbolic cosine type maximum exponent absolute value robust estimation method for the state of a power system. The present invention will be described in detail below in conjunction with embodiments.

[0032] The hyperbolic cosine type maximum exponential absolute value robust estimation method of the power system state includes the following steps:

[0033] Step A: extract active and reactive power injected into power system nodes, branch active and reactive power, and node voltage amplitude parameters; in this way, hyperbolic cosine maximum exponential absolute value robust state estimation (Hyperbolic cosine maximum exponential absolute value state estimation) is established. estimation, COSH-MEAV) basic model.

[0034] The basic model of COSH-MEAV is shown below

[0035]

[0036] s.t.g(x)=0 (2)

[0037] r=z-h(x) (3)

[0038] In the formula: z∈R m For vector measurement, it often includes node injection active and reactive po...

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Abstract

The invention discloses a hyperbolic cosine type maximum exponent absolute value robustness estimation method of the power system state, which belongs to the field of power system scheduling automation. The method includes the steps of: extracting active and reactive power injected into power system nodes, branch active and reactive power, and node voltage amplitude parameters; thereby establishing a hyperbolic cosine type maximum exponential absolute value robust state estimation basic model; Curvilinear cosine type maximum exponent absolute value robust state estimation basic model introduces auxiliary variable, obtains hyperbolic cosine type maximum exponent absolute value robust state estimation equivalent model; Solve the equivalent model for state estimation with maximum exponential absolute value robustness. The example analysis shows that the invention has strong error resistance and high calculation efficiency, and has good engineering application prospects.

Description

technical field [0001] The invention belongs to the field of electric power system scheduling automation, in particular to a hyperbolic cosine type maximum exponent absolute value robustness estimation method for the state of the electric power system. Background technique [0002] Power system state estimation is the foundation and core of energy management systems. Now almost every large dispatch center has installed a state estimator, and state estimation has become the cornerstone of the safe operation of the power grid. Since state estimation was first proposed by foreign scholars in 1970, people have studied and applied state estimation for more than 40 years, and various state estimation methods have emerged during this period. [0003] At present, the most widely used state estimation at home and abroad is the weighted least squares (WLS) method. The WLS model is simple and easy to solve, but its robustness is poor. In order to enhance the tolerance, there are gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
Inventor 陈艳波张璞韩子娇董鹤楠韩通于普瑶马进
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)