Flow state evaluation method for power grid with UPFC based on standardized Euclidean distance

A technology of power flow state and Euclidean distance, applied in the direction of single-network parallel feeding arrangement, etc., can solve problems such as the inability to reflect the deviation degree of the power flow distance from the optimal power flow, single target, etc., achieve objective evaluation results and improve the utilization rate

Active Publication Date: 2016-01-13
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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Problems solved by technology

At present, most of the existing power flow evaluation methods start from the perspective of balanced line load rate, and judge the relative advantages and disadvantages of different oper

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  • Flow state evaluation method for power grid with UPFC based on standardized Euclidean distance
  • Flow state evaluation method for power grid with UPFC based on standardized Euclidean distance
  • Flow state evaluation method for power grid with UPFC based on standardized Euclidean distance

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[0031] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0032] A method for evaluating the power flow state of a power grid containing UPFC based on standardized Euclidean distance, comprising the following steps:

[0033] Step 1. Establish a power flow optimization model considering UPFC:

[0034] Taking the system operating conditions and UPFC performance parameters as constraints, and taking the highest line load balance and the minimum line loss as the optimization goals, calculate the optimal power flow of the power grid with UPFC;

[0035] Step 2. According to the optimal power flow calculation results, standardize the load rate data of each line, and use the standardized data as a reference mult...

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Abstract

The invention discloses a flow state evaluation method for a power grid with a UPFC based on standardized Euclidean distance. The flow state evaluation method is characterized by comprising the following steps that step one, a power grid flow optimization model considering the UPFC is established; step two, standardization processing is performed on load rate data of each line according to the optimal flow calculation result; step three, standardization processing is performed on the line load rate data under the working condition in view of a certain operation working condition to be evaluated; and step four, Euclidean distance between the working condition to the evaluated and the ideal optimal working condition is calculated, and the calculation result acts as the flow state evolution indicator under the working condition. An optimization objective is formulated from the two angles of line load balancing degree and line loss, the flow state evolution indicator is defined as the standardized Euclidean distance between the actual flow and the ideal flow, and finally different operation modes are evaluated according to the size of the indicator value.

Description

technical field [0001] The invention relates to a method for evaluating the power flow state of a power grid containing UPFC based on standardized Euclidean distance. Background technique [0002] A unified power flow controller (UPFC) is a typical flexible power transmission device, which can independently control the voltage, impedance and transmission angle of the transmission line by injecting series voltage, and can also selectively control the active and reactive power flow on the line , effectively improve the stability of the power system, has a wide range of application prospects. In practical engineering, it is often necessary to evaluate the different power flow states of the power grid containing UPFC and formulate a better UPFC control strategy. At present, most of the existing power flow evaluation methods start from the perspective of balanced line load rate, and judge the relative advantages and disadvantages of different operation modes according to the lin...

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Application Information

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IPC IPC(8): H02J3/38
Inventor 陈静周前刘建坤张宁宇朱鑫要卫鹏
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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