Discrimination method and device for AC channel of station-level control system of flexible HVDC converter station
A flexible DC power transmission and control system technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problems of power outage project cost and other problems, and achieve the effects of simple configuration, improved judgment reliability, and simple and reliable equipment
Active Publication Date: 2016-06-15
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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Problems solved by technology
[0005] One of the purposes of the present invention is to provide a station-level control system for flexible direct current transmission converter stations in order to solve the existing problems of using a safe and stable control device to judge the channel state of the AC system that requires power outages during engineering construction and high engineering cost Discrimination method of communication channel
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specific Embodiment 1
[0031] refer to Figure 3-Figure 5 , the discriminating device for the AC channel of the station-level control system of the flexible DC power transmission converter station involved in this embodiment includes a large power grid side converter station 10, a wind farm side converter station 20, a large power grid AC substation 1, and several wind farm AC The substation, the wind farm side converter station is connected to the large power grid side converter station, the large power grid AC substation is connected to the wind farm AC substation, and the auxiliary node acquisition device of the circuit breaker is installed in each wind farm AC substation. A state monitoring device is set in the substation, and the signal output end of the auxiliary node acquisition device is connected to the signal input end of the state monitoring device through a 2M communication channel. The state monitoring device has a logic judgment circuit structure and several I / O ports, each The I / O por...
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The present invention relates to a method and device for discriminating the AC channel of the station-level control system of a flexible DC power transmission converter station. Configure the auxiliary node acquisition device of the circuit breaker in each AC substation of the wind farm, and set up a status monitoring device in the AC substation of the large power grid. The information collected by the auxiliary node acquisition device is sent to the status monitoring device. Collect information for logical judgment; the distinguishing device is characterized in that: the converter station on the wind farm side is connected to the converter station on the large grid side, the AC substation of the large grid is connected to the AC substation of the wind farm, and the circuit breaker is configured locally in each wind farm AC substation The auxiliary node acquisition device, the signal output end of the auxiliary node acquisition device is connected to the signal input end of the state monitoring device through a 2M communication channel. The invention has the beneficial effects of simple and reliable equipment, environmental friendliness and low cost.
Description
technical field [0001] The invention relates to a method and a device for discriminating an AC channel of a station-level control system of a flexible DC power transmission converter station. It belongs to the technical field of flexible direct current transmission equipment. Background technique [0002] Offshore wind power grid accommodation is a major problem in offshore wind power construction. Flexible DC transmission is based on voltage source converters and pulse width modulation technology to invert DC voltage into AC voltage with controllable amplitude and phase, and can independently and quickly Controlling the transmitted active power and reactive power greatly enhances the flexibility of power transmission and becomes the most potential power transmission method to achieve a stable connection between large wind farms and the main grid. [0003] Since the flexible DC transmission system needs to determine whether the AC system of the wind farm is connected to the...
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IPC IPC(8): H02J3/38G01R31/02G01R31/327
Inventor 彭冠炎鲁丽娟伦振坚施世鸿刘继权蔡田田朱海华贾红舟陈冰
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD