Method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement

A technology of comprehensive compensation and compensation capacity, applied in reactive power compensation, harmonic reduction devices, reactive power adjustment/elimination/compensation, etc., can solve the problems of dynamic compensation device capacity waste, economic uneconomical, unfavorable device promotion and application, etc. , to achieve a good system voltage adjustment effect, reduce the investment amount, and achieve the effect of reasonable design

Inactive Publication Date: 2011-03-30
ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO
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Problems solved by technology

This design method is not aimed at cost performance, and it is not economically cost-effective, and it is easy to cause waste of the capacity of the dynamic compensation device, which is not conducive to the popularization and application of such devices

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  • Method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement
  • Method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement
  • Method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0014] see figure 1 , according to the basic process of design and distribution of dynamic capacity and fixed capacity of parallel hybrid comprehensive compensation device, firstly, the 95% probability values ​​Q, Pst and In of system reactive power, flicker and harmonic, and average power factor are obtained through measurement and calculation λ, at the same time set the power factor, flicker and the expected value λe, Pstg and Inth (n is the number of harmonics exceeding the standard), where Pstg and Inth are both 40% of the national standard value. Calculate the flicker improvement rate Pg according to the 95% probability value Pst of flicker and the expected flicker value Pstg after governance. The calculation formula is: P g = p st ...

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Abstract

The invention discloses a method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement. The method comprises: measuring the 95% probability value and average power factor of obtained idle work, harmonic wave and flicker; calculating the harmonic wave compensation capacity Qx; calculating the flicker improvement rate; calculating the needed reactive compensation ratio; defining the reactive compensation capacity Qw of the dynamic compensation arrangement as half of the compensation capacity; defining the dynamic compensation capacity Qd of the parallel connection mixed type comprehensive compensation arrangement as the root-mean-square value of Qw and Qx; composing a dynamic compensation part with theactual dynamic reactive compensation capacity of 2Qw; calculating the needed total reactive compensation capacity Qz; and defining the capacity Qg of the fixed capacity compensation branch as the difference value of the Qz and 2Qw. The invention provides effective guidance to the distribution of the dynamic capacity and fixed capacity of mixed type parallel connection comprehensive compensation arrangement, guarantees compensation effect, while greatly reduces the capacity of dynamic compensation arrangement, thereby improves the cost performance of the arrangement.

Description

technical field [0001] The invention relates to a capacity design method of a parallel hybrid comprehensive compensation device, in particular to a parallel connection comprehensive compensation device composed of a parallel dynamic compensation device based on a device that can be turned off and a fixed capacitive compensation branch that can be switched. Design and allocation methods for dynamic capacity and fixed capacity. Background technique [0002] With the development of the power system, the application of various nonlinear and impact loads is becoming more and more extensive, and the subsequent power quality problems such as harmonics, voltage fluctuations and flicker are becoming more and more prominent, and the requirements for related compensation devices are also increasing. Traditional compensation methods such as fixed capacitors and passive filters cannot meet the requirements. The shunt dynamic compensation device based on turn-off devices represented by S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/01
CPCY02E40/30Y02E40/40
Inventor 范瑞祥孙旻肖红霞
Owner ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO
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