A compact control and protection host for flexible direct distribution network
A control protection and compact technology, applied in the direction of power transmission AC network, etc., can solve the problems of less DC distribution network, flexible DC technology research and application lag, etc.
Active Publication Date: 2021-06-08
BEIJING SIFANG JIBAO AUTOMATION +1
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Problems solved by technology
However, the research and application of flexible DC technology in power distribution systems is relatively lagging behind. There are still few researches on DC distribution network and its engineering application, and there are still a lot of theoretical and technical problems to be solved.
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[0039] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0040] like figure 1Shown is a network structure diagram of a flexible direct distribution network compact control protection host. The compact control and protection host of flexible direct distribution network adopts the concept of functional modular design, and each functional plug-in realizes specific functions. Plug-in types mainly include: main CPU plug-in, logic processing plug-in, analog acquisition plug-in, communication interface plug-in, input plug-in, output plug-in, communication management plug-in, power plug-in, etc. All plug-ins in the control and protection mainframe are connected together through the backplane bus of the chassis. The main CPU plug-in completes fast protection logic, sampling data processing, redundancy switching and inter-station communication management functions, etc. The main CPU plug-in sends...
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A compact control and protection host for a flexible direct distribution network, which is characterized by: including the communication network design between the various plug-ins inside the protection control host, the design of the control LAN network between the protection control hosts, the protection control host, the flexible direct current converter unit, and the DC transformer. Communication network design between equipment-level controllers such as units, AC and DC loads, wind, solar and storage distributed power supplies. The compact control and protection host of the flexible direct distribution network of the present invention is based on the real-time communication system architecture and adopts the open, modular and compact design principles to realize the compact design of the structure and function of the protection and control device, greatly simplifying the control and protection. Hardware structure, improve system reliability and reduce costs. Through the collaborative method of control and protection functions, the DC distribution network system's rapid fault location, fault removal and rapid recovery capabilities after faults are improved.
Description
Technical field [0001] The invention relates to a compact control and protection host for a flexible DC distribution network, belonging to the technical field of flexible DC distribution networks and equipment. Background technique [0002] As the scale of the AC power grid continues to expand and the voltage level increases, the operation control process of the AC system becomes more and more complex. At the same time, after large-scale DC equipment such as distributed power sources (wind and solar storage, etc.) and DC loads are connected to the AC power grid, the safe and stable operation of the AC system faces more severe challenges due to the need to increase the AC-DC conversion link. Research results in recent years have shown that DC transmission technology is one of the effective means to solve the problems existing in the existing distribution network. The hybrid AC and DC power distribution system can not only better accommodate high-density distributed energy so...
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IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 司喆陈莉黄辉董天雪白雪玲
Owner BEIJING SIFANG JIBAO AUTOMATION