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Harmonic wave performance control method for high voltage DC transmission total voltage recovery process

A high-voltage direct current transmission and recovery process technology, applied in direct current circuits to reduce harmonics/ripples, etc., can solve problems such as lack of harmonic performance control methods and high AC grid voltage

Inactive Publication Date: 2013-06-12
XUJI GRP +1
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for controlling harmonic performance in the process of full voltage recovery of HVDC transmission, and to solve the problem of excessive voltage of AC power grid due to lack of corresponding harmonic performance control method in the process of HVDC transmission voltage recovery

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  • Harmonic wave performance control method for high voltage DC transmission total voltage recovery process
  • Harmonic wave performance control method for high voltage DC transmission total voltage recovery process
  • Harmonic wave performance control method for high voltage DC transmission total voltage recovery process

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Embodiment Construction

[0019] A method for controlling harmonic performance in the full-voltage recovery process of high-voltage direct current transmission according to the present invention, the specific implementation method is as follows:

[0020] According to the reactive power research report, the relationship between the harmonic performance configuration and the power level (the power is expressed as a percentage) is shown in Table 1, Table 2, and Table 3 respectively when the DC field voltage is 100%, 80%, and 70%. (A, B, and C represent three different types of filters), and Table 1, Table 2, and Table 3 are combined to obtain the corresponding power of various filter configurations and DC field voltages of 100%, 80%, and 70%. situation, that is, Table 4. Table 4 also calculates various filter configurations, corresponding to the power ratio of 100% DC field voltage and 80% DC field voltage, taking the average K1=1.4, corresponding to 80% DC field voltage and 70% DC In the case of field v...

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Abstract

The invention relates to a harmonic wave performance control method for a high voltage DC transmission total voltage recovery process. Based on the law that the number of filters required by harmonic wave performance is reduced progressively when DC field voltage becomes higher under the same power level, the method provided by the invention utilizes DC field real-time voltage to translate power instantly so as to allot the number of the filters. The DC field voltage is divided into the following five harmonic wave performance allocation modes: 70%, 70-80%, 80%, 80-100% and 100%. The invention can enable the harmonic wave performance filter allocation to meet harmonic wave current change law in the total voltage recovery process. By using the method, the number of the filters required by the harmonic wave performance in the voltage recovery process is reduced, and voltage of an AC power grid is kept stable, thereby solving the problem of overhigh voltage of the AC power grid due to lack of a relevant harmonic wave performance control method in the high voltage DC transmission voltage recovery process.

Description

technical field [0001] The invention relates to a method for realizing harmonic performance control in the full-voltage restoration process of a high-voltage / ultra-high-voltage direct current transmission project, in particular to the harmonic performance control in a double-circuit multi-valve group direct current transmission project on the same tower. Background technique [0002] The purpose of harmonic performance control is to ensure that the harmonic content injected into the AC system by the DC system under any working condition is controlled within a reasonable range after being filtered by the filter. High-voltage DC generally operates in bipolar power mode. When the system is under step-down operation control and the DC voltage rises and falls, the transformer taps, reactive power, and harmonic current change dynamically with the DC field voltage. Under normal circumstances, the harmonic performance is controlled by DC field step-down mode control, harmonic perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J1/02
Inventor 戴国安王柏恒刘文张举良
Owner XUJI GRP
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