AC fault ride-through control method for new energy access flexible DC distribution network system
A flexible DC and fault ride-through technology, applied in power transmission AC network, single-network parallel feeding arrangement, etc., can solve the problems of reducing the reliability of new energy systems and waste of new energy systems.
Active Publication Date: 2022-04-22
BEIJING SIFANG JIBAO AUTOMATION +1
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[0003] In the above method, the reliability of the operation of the new energy system is reduced, resulting in waste of new energy systems such as photovoltaics and wind power.
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[0040] 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.
[0041] 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.
[0042] 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 present disclosure relates to the technical field of flexible DC distribution network, and in particular to an AC fault ride-through control method under the access of new energy to the flexible DC distribution network system. The new energy system is connected to the AC grid through the flexible DC distribution network system, and the new energy system is connected to the new energy control system. The method includes: when the AC network fails, the new energy control system starts to fail A ride-through function, the fault ride-through function is used to instruct to reduce and / or transfer the operating power of the new energy system. The embodiment of the present disclosure reduces and / or transfers the operating power of the new energy system by starting the fault ride-through function through the new energy control system when the AC network fails, and reduces the direct shutdown of the new energy system when the AC grid fails in the related art. The probability of operation improves the reliability of the operation of the new energy system, and is conducive to the recovery of the subsequent failure of the AC power grid.
Description
technical field [0001] The present disclosure relates to the technical field of flexible DC distribution network, and in particular to an AC fault ride-through control method under the access of new energy to the flexible DC distribution network system. Background technique [0002] At present, in the flexible DC distribution network project, new energy systems such as photovoltaics and wind power are connected to the AC grid through the flexible DC distribution network. When the AC grid fails, new energy systems such as photovoltaics and wind power are disconnected from the AC grid by tripping. , after the AC fault is cleared, the new energy system needs human intervention before it can run again. [0003] In the above method, the reliability of the operation of the new energy system is reduced, resulting in waste of new energy systems such as photovoltaics and wind power. Contents of the invention [0004] In view of this, the present disclosure proposes an AC fault rid...
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IPC IPC(8): H02J3/38H02J3/36
CPCH02J3/38H02J3/36Y02E60/60
Inventor 杨伟涛曹浪恒李俊松陈焕丽翁永语罗滨谢珩殷勤栗静男梅红明
Owner BEIJING SIFANG JIBAO AUTOMATION