A system debugging method for hierarchical access mode of ±1100kv UHVDC transmission project

A UHV DC and layered access technology, applied in the direction of power transmission AC network, etc., can solve the problems that there are no public reports on the layered access system of high-end and low-end converters, so as to alleviate the tension of power supply and promote The effect of economic development and long transmission distance

CN106611958BActive Publication Date: 2019-06-28CHINA ELECTRIC POWER RES INST +1
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-06-28

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention relates to a system for layered access of 500kV / 1,000kV AC power grid to converters at a high end and a lower end of + / -1,100kV extra-high voltage DC power transmission engineering and a debugging method of the system. The system comprises converters at two ends and a DC power transmission line. The debugging method for a + / -1,100kV extra-high voltage DC power transmission engineering system comprises the steps of (a) performing calculation and analysis by a + / -1,100kV extra-high voltage DC power transmission engineering multi-feed system; and (b) compiling the debugging method for a layered access system of the + / -1,100kV extra-high voltage DC power transmission engineering. The system is characterized by comprising the following two aspects: (1) 1,100kV voltage is the highest DC voltage class at present, and with regard to a test scheme of the layered access AC system of the converters at the high end and the lower end, the impact on equipment during the test process is needed to be reduced according to performance of the DC multi-feed system and the equipment; and (2) the converters at the high end and the lower end initially employ layered access of the 500kV / 1,000kV AC power grid, and the part of test scheme is also initially compiled.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of ultra-high voltage direct current transmission, in particular to a system debugging method for a ±1100kV ultra-high voltage direct current transmission project in a layered access mode. Background technique

[0002] The ±1100kV UHV DC transmission project transmits electric energy in the form of direct current. Compared with the ±800kV UHV DC transmission project, it is characterized by a larger transmission capacity and a longer distance of more than 3000km.

[0003] At present, no similar public reports have been seen at home and abroad about the test method for the hierarchical connection system of the high- and low-end converters of the ±1100kV UHV DC transmission project. Contents of the invention

[0004] The purpose of the present invention is to provide a ±1100kV UHV DC transmission project layered access system debugging method, as part of the UHVDC project system debugging, the ±1100kV UHVDC project lay...

Examples

Embodiment Construction

[0052] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0053] The present invention provides a ±1100kV UHVDC power transmission engineering system. The system includes a converter station at both ends and a DC transmission line. The converter stations at both ends are connected through the DC transmission line; the converter stations at both ends adopt bipolar commutation Converter, each pole converter includes two 12-pulse converters in series, the series voltage is connected in series according to ±(550+550)kV;

[0054] The DC unipolar normal operating DC voltage of the single-ended converter station is ±1100kV, and the operating DC voltage of the single 12-pulse converter is 550kV. The main loop connection mode of the ±1100kV UHV DC transmission project is connected in layers to the 500kV / 1000kV AC system; the ±1100kV UHV provided by the present invention The wiring diag...