A Dynamic Economic Dispatch Method of Power System Based on Improved Particle Swarm Algorithm

A technology for improving particle swarms and power systems. It is applied in the field of economic dispatch and can solve problems such as waste, exceeding the limit of tens of millions of particles, and poor search area targeting.

Active Publication Date: 2017-09-01
STATE GRID CORP OF CHINA +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are easy to exceed the limit by tens of millions of particles, and are not very specific to the search area in the later stage of iteration, which is easy to waste tens of millions of iterations.

Method used

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  • A Dynamic Economic Dispatch Method of Power System Based on Improved Particle Swarm Algorithm
  • A Dynamic Economic Dispatch Method of Power System Based on Improved Particle Swarm Algorithm
  • A Dynamic Economic Dispatch Method of Power System Based on Improved Particle Swarm Algorithm

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Embodiment

[0142] The example data of the power system used in the present invention are as follows, the specific load data are as shown in Table 1, and the power supply parameters are as shown in Table 2. There are 6 thermal power generating units in total. The B coefficient matrix method is adopted when the present invention calculates the network loss, so it is listed B coefficient matrix is ​​in Table 3.

[0143] Table 1 Load parameters

[0144]

[0145]

[0146] Table 2 Unit parameters

[0147]

[0148] Table 3B coefficient matrix parameter unit: ×10 -5

[0149]

[0150] Table 4 Output of each unit at each time period

[0151]

[0152]

[0153] Table 5 Total Power Generation Costs in Dispatch Days

[0154]

[0155] Table 4 shows the optimization results of the output of each unit obtained by using the improved particle swarm. Table 5 respectively shows the total power generation and power generation cost in the scheduling day obtained by the conventional part...

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Abstract

The invention relates to a dynamic and economical dispatching method of a power system based on the improved Particle Swarm Optimization (PSO). The method includes: setting various parameters of the PSO; generating an initial particle swarm; setting upper and lower limits for the particle velocity; calculating the fitness value of each particle according to an object function; comparing the fitness value of each particle to find out the historicaloptimum value and the position of each particle, and to find out the particle that has the most optimum value and the position thereof; updating the position and the velocity of each particle; determining whether the position and the velocity of the particles are beyond the limit or not, if the position and the velocity of the particles are beyond the limit, adjusting the position and the velocity of the particles into the constraint range, speeding up the velocity of the particles; and if the iterations frequencies are reached, stopping iteration and obtaining a final result. The method of the invention is improved in solving the dynamic and economical dispatching problem of a power system by using the PSO and adjusts the velocity of the particles by an adaptive algorithm. When searching is limited to local searching, a more targeted way is employed to obtain a good result.

Description

technical field [0001] The invention relates to an economic scheduling method for optimal operation of a power system, in particular to a dynamic economic scheduling method for a power system based on an improved particle swarm algorithm. Background technique [0002] The operation of the unit requires cost, and the operation of the power system needs to consider the economics of operation. Different units have different cost functions, and the economic costs of different output schemes are also different. The purpose of economic dispatch is to optimize the output of each unit within a certain period to obtain the optimal output level and minimize the cost. The output of the unit in the front and rear periods also involves the constraints of the unit’s climbing ability, and the output of the unit in the front and rear periods is closely related, which requires dynamic economic dispatch of the power system. Dynamic economic dispatch of power system is a part of safe and econ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00
Inventor 李相俊宁阳天麻秀范杨水丽惠东陈金详
Owner STATE GRID CORP OF CHINA
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