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Reactive power compensation control method and system for space power generation receiving station based on genetic algorithm

A genetic algorithm and compensation control technology, applied in the direction of genetic model, etc., can solve the problem of not given compensation capacity calculation method and switching control scheme.

Active Publication Date: 2017-09-26
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on this issue is still at the stage of installing capacitor banks at the grid-connected point of the inverter bus, and no specific compensation capacity calculation method and switching control scheme have been given.

Method used

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  • Reactive power compensation control method and system for space power generation receiving station based on genetic algorithm
  • Reactive power compensation control method and system for space power generation receiving station based on genetic algorithm
  • Reactive power compensation control method and system for space power generation receiving station based on genetic algorithm

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Embodiment 1

[0077] figure 1 For, as shown in the figure: a genetic algorithm-based reactive power compensation control method for space power generation ground receiving stations provided by the present invention includes the following steps:

[0078] Step 1. According to the transmission path between the space power station and the ground receiving station and the inverting relationship between the ground receiving station and the user, establish a reactive power optimization mathematical model with the goal of minimizing the network loss;

[0079] Step 2: Chromosomal coding is performed on the compensation capacitance in the model of the ground receiving station for space power generation, the received power P of the ground receiving station, the node load power and the node voltage to form an initial population;

[0080] Step 3: Calculate the fitness value of the individual in the initial population that meets the constraint test; select, adaptively cross and mutate according to the fi...

Embodiment 2

[0138] see figure 1 , The space power station converts the received sunlight and heat into electrical energy, and then transmits it back to the earth through microwave lasers, etc., and the ground receiving station converts the received electrical energy into commercial alternating current. Due to the impact of space natural disasters such as magnetic storms when transmitting back to the ground in space, the power received by the ground is not a constant value, and the reactive power consumed when inverting AC:

[0139]

[0140] in,

[0141]

[0142]

[0143] In the formula, Q dc is the reactive power consumption of the converter, Mvar; U dio is the ideal no-load DC voltage of the converter, kV; P is the DC power of the ground receiver side, MW; μ is the commutation angle; γ is the arc extinguishing angle of the inverter; d x is the relative inductive voltage drop; I d , I dN are DC running current and rated DC current respectively, kA; U 1 is the effective valu...

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Abstract

The invention discloses a genetic algorithm-based reactive power compensation control method for space power generation ground receiving stations. According to the principles of space power generation and power transmission, a reactive power optimization model for space power generation ground receiving stations connected to the grid is established; for the space power generation ground receiving station model The reactive power compensation capacity, received power P, node load power and node voltage in the system are encoded by chromosome to form the initial population. Calculate the fitness value of the individual in the initial population that meets the constraint test; select, adaptively cross and mutate according to the fitness value of each individual in the initial population to generate a new generation of population; if the maximum fitness of individuals in two adjacent generations of population If the absolute value of the value difference is less than the set value ε, then the individual with the largest fitness value in the new population will be decoded to obtain the optimal value of reactive power compensation. The method of the invention has fast calculation speed and strong versatility, and has high theoretical significance and application value for reactive power optimization of space power generation ground receiving stations.

Description

technical field [0001] The invention relates to the field of reactive power compensation construction of a space power generation ground receiving station, in particular to a reactive power compensation control method based on a genetic algorithm for a space power generation receiving station. Background technique [0002] Reactive power is an important factor in the design and operation of the power system, and is closely related to the safe and stable operation of the power system and the power economy. First of all, the increase of reactive power will lead to the increase of current, which not only increases the loss of equipment and lines, but also threatens the safe operation of equipment; in addition, the increase of current and apparent power will also cause generators, The capacity of transformers and other electrical equipment increases, and at the same time, the size and specifications of power users' start-up and control equipment and measuring instruments also in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06N3/12
Inventor 黄淼甘仁民刘国平杨帆陈涛徐瑞林
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST