Metering method and system of medium and low voltage direct current power transmission system

Abstract

The invention discloses a metering method and system of a medium and low voltage direct current power transmission system, and belongs to the technical field of medium and low voltage direct current power transmission equipment. The metering method of the medium and low voltage direct current power transmission system comprises the following steps: 1 collecting system operation information, and metering electric energy; 2 reading the collected metering data and equipment alarm information, and storing the data; 3 processing the collected data, analyzing the operation state of the system, and calculating the electric charge; and 4 simulating the running state of the system. According to the invention, through continuous exploration and test, the electric energy is metered by collecting the actual operation information of the system; meanwhile, the electric energy can be effectively managed and the metering result can be corrected according to the collected information, and the scheme is scientific, reasonable and accurate; and the scientific metering requirements of power grid companies and users on the medium and low voltage direct current power transmission system can be met.

Description

technical field [0001] The invention relates to a metering method and system for a medium and low voltage direct current transmission system, belonging to the technical field of medium and low voltage direct current transmission equipment. Background technique [0002] In recent years, DC transmission technology has developed rapidly, but there are few researches on energy metering of medium voltage DC transmission system. At present, the relevant national standards and industry standards have relatively detailed specifications for DC measurement below 1000V, but for medium-voltage DC, such as the measurement of 10kV bus DC distribution system, the relevant research is still in its infancy. [0003] Chinese patent (publication number CN104655990A) discloses a medium and low voltage distribution network simulation system based on energy feedback, which includes an input incoming cabinet connected to a step-up transformer wire, a step-up transformer and a high-voltage meter W...

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Problems solved by technology

[0003] Chinese patent (publication number CN104655990A) discloses a medium and low voltage distribution network simulation system based on energy feedback, which includes an input incoming line cabinet connected to a step-up transformer wire, a step-up transformer and a high-voltage meter Wire connection, the high-voltage meter is connected with the wire of the first cable simulation device, the first cable simulation device is connected with the step-down transformer wire, the step-down transformer is connected with the second cable simulation device with wire, the second cable simulation device is connected with the low-voltage The wire connection of the outlet cabinet, the connection of the low-voltage outlet cabinet and the wire of the electronic load, and the connection of the wire of the electronic load and the isolation transformer; solve the problem that there is no special real-time monitoring system for energy saving and loss reduction in the prior art. In the test of electrical equipment, the load often adopts RLC impedance The load box is carried out in the way of energy consumption discharge, the test accuracy is low, the waste of electric energy is serious, the load is difficult to meet the continuous adjustment ability of different working conditions, the power is small, it is easy to cause aging and burning of the device, poor thermal stability, single load form and other problems

[0005] However, this scheme is a pure medium and low voltage distribution network simulation system, which cannot manage the power and check the measurement results of the actual medium and low voltage direct current transmission system, and cannot meet the requirements of power grid companies and users for scientific measurement of medium and low voltage direct current transmission systems

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