Method and a device for setting local protection of wind-fire bundling through DC outgoing subsynchronous oscillation
A sub-synchronous oscillation, wind-fire bundling technology, applied in the direction of reducing/preventing power oscillation, etc., can solve problems such as inaccuracy
Active Publication Date: 2019-01-11
国家电网公司东北分部 +1
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Problems solved by technology
[0004] In related technologies, in order to effectively control the risks caused by the connection of large-scale wind turbines, sub-synchronous oscillation monitoring and protection devices are installed when wind power collection stations are connected to the system. The sub-synchronous oscillation monitoring and protection devices can be based on the sub-synchronous oscillation current The component monitors and protects the subsynchronous oscillation. However, the setting of the protection setting of the device in the related technology is still based on experience, which is very imprecise.
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[0065] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
[0066] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.
[0067] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific implementation manners. It will be understood by those skilled in the art that the present disclosure may be practiced without some of the specific details. In some instances, methods, means, componen...
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The invention relates to a method and a device for setting local protection of wind-fire bundling through DC outgoing subsynchronous oscillation. Including the standard frequency of the power grid system, normalizing a first oscillation current amplitude and a second oscillation current amplitude of a plurality of transformers and a plurality of thermal power units connected to a line with the shortest distance between a grid protection device and a DC converter station at a specified oscillation frequency to a first equivalent oscillation current amplitude and a second equivalent oscillationcurrent amplitude, respectively, and the minimum of the plurality of first equivalent oscillation current magnitudes and the plurality of second equivalent oscillation current magnitudes is taken as athird equivalent oscillation current magnitude for starting the grid system protection. The invention does not need to cut off the wind farm according to the experience setting, and the wind farm canbe set more accurately and reasonably.
Description
technical field [0001] The present disclosure relates to the field of new energy technology, in particular to a method and device for in-situ protection and setting of sub-synchronous oscillation for wind-fire bundling via direct current transmission. Background technique [0002] As an advanced and mature form of renewable energy utilization, wind power is an important means to develop clean and low-carbon energy and adjust the energy structure in my country. It has achieved sustained and rapid development in recent years. [0003] Different from traditional generators, new energy generation such as wind and light are integrated into the power grid through power electronic devices, and its multi-time scale control characteristics interact with the characteristics of the power grid itself, which may cause sub-synchronization into the traditional power system in the harmonic frequency band No control instability and oscillation problems. In recent years, this kind of problem...
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Login to View More IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 夏德明侯凯元阴宏民王克非王震宇岳涵刘洋常富杰王莹莹赵伟华孙小晶
Owner 国家电网公司东北分部