AC fault ride-through control method under condition that new energy is accessed to flexible DC distribution network system
A flexible direct current, fault ride-through technology, applied in the direction of power transmission AC network, single-network parallel feeding arrangement, etc., can solve the problems of waste of new energy systems and reduce the reliability of new energy systems
Active Publication Date: 2020-09-15
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 invention relates to the technical field of flexible direct-current power distribution networks, in particular to an alternating-current fault ride-through control method under the condition thatnew energy is accessed to a flexible direct-current power distribution network system. The new energy system is connected with an AC power grid through the flexible DC distribution network system. Thenew energy system is connected with a new energy control system, and the method comprises: when the alternating current network breaks down, the new energy control system starting a fault ride-through function, and the fault ride-through function being used for indicating reduction and / or transfer of the operation power of the new energy system. According to the embodiment of the invention, whenthe alternating current network fails, the fault ride-through function is started through the new energy control system, the operation power of the new energy system is reduced and / or transferred, theprobability of direct outage of the new energy system when the alternating current power grid breaks down in the related technology is reduced, the operation reliability of the new energy system is improved, and subsequent fault recovery of the alternating current power grid is facilitated.
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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Login to View More 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