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Parallel reactive power compensation device electricity saving quantity measurement uncertainty evaluation method

A technology for measuring uncertainty and compensating devices, used in power factor measurement, electrical power measurement by current/voltage, electrical devices, etc.

Active Publication Date: 2017-04-26
STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST +2
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  • Application Information

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Problems solved by technology

[0004] At present, through consulting the domestic and foreign literature, there is no report on the uncertainty calculation method of the measurement method of the energy saving of the parallel reactive power compensation device. Therefore, it is necessary to design a measurement uncertainty evaluation of the energy saving of the parallel reactive power compensation device method

Method used

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  • Parallel reactive power compensation device electricity saving quantity measurement uncertainty evaluation method
  • Parallel reactive power compensation device electricity saving quantity measurement uncertainty evaluation method
  • Parallel reactive power compensation device electricity saving quantity measurement uncertainty evaluation method

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Embodiment 1

[0064] This embodiment takes parallel reactive power compensation of an AC 0.4 kV, 50 Hz low-voltage power distribution system as an example. Such as figure 1 As shown, in this embodiment, a single parallel reactive power compensation device is installed on the outlet side of the transformer in the station area. In this embodiment, the measurement device includes current transformers, reactive power optimization and coordination controllers, wherein the accuracy of current transformers is 0.5 grades, a total of 3 sets; the voltage measurement accuracy of reactive power optimization and coordination controllers is 0.5 grades, and the current measurement accuracy is 0.5 grades. Level 0.5, all with 3 channels; the measurement accuracy of active power, reactive power and power factor of the reactive power optimization and coordination controller is level 1; the clock timing error of the time measurement device in the reactive power optimization and coordination controller is 2s / ...

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Abstract

The invention discloses a parallel reactive power compensation device electricity saving quantity measurement uncertainty evaluation method. The method includes the following steps that: (1)a parallel reactive power compensation device electricity saving quantity measurement scheme is established; (2) the equivalent circuit model of the measurement scheme is established, the digital model of parallel reactive power compensation device electricity saving quantity is obtained according to the circuit model, and the digital model is adopted as the measurement model of parallel reactive power compensation device electricity saving quantity measurement uncertainty evaluation; (3) the components of uncertainty are calculated; (4) the components of the uncertainty are merged into a standard uncertainty uc; and (5) the extended uncertainty U of the measurement result of the parallel reactive power compensation device electricity saving quantity is calculated. The parallel reactive power compensation device electricity saving quantity measurement uncertainty evaluation method provided by the invention is of great significance for the further improvement of the accuracy of electricity saving quantity results, has high operability and can provide references for the electricity saving quantity measurement uncertainty evaluation of electricity saving projects such as transformer economic operation and line boosting transformation.

Description

technical field [0001] The invention relates to the energy saving measurement of a parallel reactive power compensation device installed in a power supply and distribution system, in particular to a method for evaluating the measurement uncertainty of the parallel reactive power compensation device energy saving. Background technique [0002] Energy saving is a long-term strategic policy for my country's economic and social development, and it is also an extremely urgent task at present. With the increasingly prominent contradiction between supply and demand and the increasing environmental pressure, my country has made energy conservation and environmental protection an important national policy. The conservation of electric energy has also attracted the attention of various industries in the society. Among them, the notice of "Power Demand Side Management Measures" issued by the National Development and Reform Commission emphasizes the need to improve the efficiency of ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R21/06G01R21/00
CPCG01R21/001G01R21/006G01R21/06
Inventor 徐先勇徐湘沪朱光明王伟能陆新洁
Owner STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST
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