Method and apparatus for determining maximum permeability of distributed power source

A technology of distributed power supply and maximum penetration rate, applied in the field of distribution network, can solve the problems of power system frequency limit and large active power shortage

Active Publication Date: 2018-01-16
CHINA ELECTRIC POWER RES INST +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the defect that the active power of the power system is too large in the prior art, which leads to the frequency limit of the power system, the present invention provides a method and device for determining the maximum penetration rate of distributed power sources. Calculate the capacity ratio of distributed power generation and the fluctuation rate of distributed power generation; then determine the maximum penetration rate of distributed power generation according to the capacity ratio of distributed power generation, which is used to guide the planning and operation of distribution network with distributed power generation, and for Provide a theoretical basis for the access and application of distributed power in distribution networks

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  • Method and apparatus for determining maximum permeability of distributed power source
  • Method and apparatus for determining maximum permeability of distributed power source

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Embodiment 1

[0085] Embodiment 1 of the present invention provides a method for determining the maximum penetration rate of a distributed power supply. The difference between this method and the prior art is that this method takes into account the frequency stability constraints. When the power-frequency adjustment effect of the load is not considered, the distributed The fluctuation of the power supply does not exceed the reserve capacity of the power system. The flow chart of the method for determining the maximum penetration rate of the distributed power supply provided by Embodiment 1 of the present invention is as follows figure 1 , the specific process is as follows:

[0086] S101: Calculate the capacity proportion of the distributed power supply according to the comprehensive reserve capacity ratio of the generator set and the fluctuation rate of the distributed power supply;

[0087] S102: Determine the maximum penetration rate of distributed power according to the capacity ratio o...

Embodiment 2

[0105] Based on the same inventive concept as in Embodiment 1, Embodiment 2 of the present invention also provides a device for determining the maximum penetration rate of distributed power sources. The device method is similar. The device for determining the maximum penetration rate of the distributed power supply provided by Embodiment 2 of the present invention mainly includes a calculation module and a determination module. The functions of the above two modules are introduced as follows:

[0106] The calculation module is mainly used to calculate the capacity ratio of the distributed power supply according to the comprehensive reserve capacity ratio of the generator set and the fluctuation rate of the distributed power supply;

[0107] The determination module is mainly used to determine the maximum penetration rate of distributed power according to the capacity ratio of distributed power.

[0108] The above-mentioned calculation module calculates the capacity proportion ...

Embodiment 3

[0121] Embodiment 3 of the present invention also provides a method for determining the maximum penetration rate of a distributed power supply. The difference between this method and the prior art is that this method takes into account the frequency stability constraints and the power regulation effect of the load. When the distributed power supply fluctuates When the system reserve capacity is exceeded, the reserve capacity of the generating set is not enough to bear the load power increase, and the remaining power deficit can only be compensated by the frequency regulation effect of the load. The flow chart of the method for determining the maximum penetration rate of distributed power sources provided by Embodiment 3 of the present invention is as follows figure 2 , the specific process of the method is as follows:

[0122] S201: Calculate the capacity proportion of the distributed power supply according to the comprehensive reserve capacity ratio of the generator set, the...

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Abstract

The invention provides a method and apparatus for determining the maximum permeability of a distributed power source. The method comprises: a capacity proportion of a distributed power source is calculated; and then on the basis of the capacity proportion of the distributed power source, a maximum permeability of the distributed power source is determined to guide the planning and operation of a distribution network including the distributed power source and provide a theoretical basis for the access and application of the distributed power source in the distribution network. According to theinvention, the influence on permeability of the distributed power source by fluctuation of the distributed power source is considered and the comprehensive standby capacity proportion of the generatorset is given, so that the maximum permeability, enabling the system frequency not to exceed the limit under different distributed power source fluctuation rate levels, of the distributed power sourceis calculated. According to the method provided by the invention, the influence on permeability of the distributed power source by the load power frequency adjusting characteristic and a load power frequency adjusting effect coefficient and a comprehensive standby capacity proportion of the generator set are given, so that the maximum permeability, enabling the system frequency not to exceed thelimit under different distributed power source fluctuation rate levels, of the distributed power source is calculated.

Description

technical field [0001] The invention relates to the technical field of distribution networks, in particular to a method and device for determining the maximum penetration rate of distributed power sources. Background technique [0002] With the increasing opening of the electricity market and the specific implementation of energy conservation and emission reduction strategies, the use of renewable energy has received more and more attention. The use of renewable energy can significantly alleviate the pressure of energy demand growth and at the same time reduce environmental pollution. Renewable energy is an important energy form to improve the energy structure and promote the sustainable development of the power grid. With the development of renewable energy, the large-scale access and application of distributed power generation represented by wind power generation and photovoltaic power generation in the power grid has become the future development trend of the power grid. ...

Claims

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Application Information

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IPC IPC(8): H02J3/38
Inventor李建芳宋晓辉张瑜高菲李雅洁
OwnerCHINA ELECTRIC POWER RES INST