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Distributed power generation planning method

A technology of distributed power generation and distributed power supply, which is applied in the field of power saving and can solve the problems of ignoring system network loss and inability to take into account reactive power transmission.

Inactive Publication Date: 2013-01-30
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

The current research on the marginal capacity cost of distribution network nodes / branches describes the costs / benefits caused by the advance / delay of equipment expansion investment caused by the increase / decrease of the unit power of the node. The expansion equipment involves the transmission of the injected power of the node. , switches and transformers, etc. However, it uses branch active power to describe the line load level and the remaining transmission capacity of the network, ignores the system network loss, cannot take into account reactive power transmission and influence, and is only applicable to DC power flow calculations

Method used

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Embodiment Construction

[0070] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0071] (1) Modeling of distribution network node / branch marginal capacity cost

[0072] 1) Node sensitivity coefficient matrix

[0073] Such as figure 1 As shown in the radial distribution feeder schematic diagram, assuming that the load growth mode is constant power factor increase, the support level of the load increase of node i to the current increase of branch k adopts the sensitivity coefficient γ ik express:

[0074] γ ik = ∂ I k ∂ P di

[0075] For the radial distribution network circuit, the load change of node i only affects the current of the br...

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Abstract

The invention provides a distributed power generation planning method and belongs to the technical field of power energy saving. The method is mainly used for coordinating relation between power grid planning and distributed power supply configuration. The method includes first introducing a node sensitivity coefficient array and a unit loading increment cost array, building a power grid node / branch margin capacity cost model and a calculation method thereof, quantizing effect of the distributed power supply grid tying on the power grid node / branch margin capacity cost and finally conducting benefit calculation and evaluation on two distributed power supply property right models owned by a user and a power grid company based on a quantization model of effect of the distributed power supply grid tying to the power grid node / branch limit capacity cost.

Description

technical field [0001] The invention belongs to the technical field of electric power saving, and in particular relates to a distributed power generation planning method based on the marginal capacity cost of distribution network nodes / branches. Background technique [0002] The current distributed power planning objectives are mainly based on cost indicators such as investment and operating costs, supplemented by reliability, safety and environmental protection indicators (or as sub-objectives with low weight coefficients, or as constraints), and rarely considered The utilization rate and adequacy of network equipment will not be conducive to the use of distributed power generation technology to optimize the allocation of system resources, improve the utilization efficiency of power supply capacity, and realize the economic operation of distribution network. Under the current situation, this problem is a coordination It is an urgent problem to be solved in the process of di...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
CPCY04S10/545Y02E40/76Y02E40/70Y04S10/50
Inventor 雷金勇甘德强董旭柱辛焕海
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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