Frequency Modulation Feedback Nash Equilibrium Control Method Based on Coevolutionary Algorithm

A co-evolutionary algorithm and Nash equilibrium technology, applied in computing, AC network circuits, instruments, etc., can solve problems such as difficulty in finding a theoretical equilibrium solution, and difficulty in solving feedback game models.

Active Publication Date: 2016-02-24
海南电网有限责任公司 +1
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Problems solved by technology

[0005] It is very difficult to solve the feedback game model of nonlinear, control variable and state variable constrained model, and it is difficult to find a theoretical equilibrium solution

Method used

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  • Frequency Modulation Feedback Nash Equilibrium Control Method Based on Coevolutionary Algorithm
  • Frequency Modulation Feedback Nash Equilibrium Control Method Based on Coevolutionary Algorithm
  • Frequency Modulation Feedback Nash Equilibrium Control Method Based on Coevolutionary Algorithm

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Embodiment

[0046] Taking the two-area interconnection system as an example, the two-area interconnection system is a system in which two frequency control areas realize the interconnection and power exchange through the area tie line in order to realize the full utilization of the capacity of the frequency modulation unit. After adding the governor dead zone, control action amplitude limit, and unit climbing rate constraint factors, the game model is as follows: figure 1 shown.

[0047] The primary and secondary frequency modulation signal in area 1 is the control signal u calculated by feedback differential game theory 1 and u 2 , area 2 adopts the traditional control method, and the first and second frequency modulation active power adjustment signals are respectively:

[0048] ΔP r2 =-1 / R 2 ×Δf 2 ,

[0049] ΔP c2 =-K 12 ×∫ACE 2 dt-K t2 ×ACE 2 ,

[0050] Among them, Δf 2 is the frequency deviation of area 2, R 2 is the primary frequency modulation and difference adjustmen...

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Abstract

The invention discloses a frequency modulation feedback Nash equilibrium control method based on a coevolution algorithm. The control method includes the steps that step1, in consideration of a speed controller dead zone, control action amplitude limit, unit creep speed constraint and other engineering practice factors, a differential game model between a primary frequency modulation and a secondary frequency modulation in an IEEE two-area interconnection system is built; step2, the coevolution algorithm is adopted for solving the differential game model, with kinds of complex constraint, between the primary frequency modulation and the secondary frequency modulation in the IEEE two-area interconnection system, and a feedback Nash equilibrium solution of the differential game model is obtained; step3, the obtained feedback Nash equilibrium strategy serves as a primary frequency modulation control quantity and a secondary frequency modulation control quantity of an area, the conflict anti-tune problem between the primary frequency modulation and the secondary frequency modulation is effectively solved, and therefore coordination control between the primary frequency modulation and the secondary frequency modulation of an electric system is achieved. The frequency modulation feedback Nash equilibrium control method has the advantages of reducing unit wastage and achieving a good control effect.

Description

technical field [0001] The invention relates to an automatic control technology of an electric power system, in particular to a frequency modulation feedback Nash equilibrium control method based on a co-evolutionary algorithm. Background technique [0002] In the power system, primary frequency regulation and secondary frequency regulation (automatic generation control, AGC) are the main means to track load changes in real time, adjust power generation output to achieve active power balance, and maintain frequency stability. [0003] The working mode, response period, control signal and control target of the primary frequency modulation and the secondary frequency modulation are quite different. The frequency deviation of the equipment location is used as the signal for the primary frequency modulation, and the active output of the unit is changed by the DEH system or the mechanical governor, which is the local frequency. Closed-loop control: Secondary frequency regulation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06Q50/06
CPCY02E40/70Y04S10/50
Inventor 陈皓勇卢润戈叶荣魏国清黄良毅吴锋
Owner 海南电网有限责任公司
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