A Design Method of Electromagnetic Ring Network Unlooping Scheme
A technology of electromagnetic ring network and design method, which is applied in the direction of power transmission AC network, circuit device, AC network circuit, etc., can solve the problems of high cost of ring solution and difficult construction of operators, and achieve the effect of reducing the cost of ring solution
Active Publication Date: 2019-06-28
ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD +1
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Problems solved by technology
[0006] The purpose of the present invention is to provide a design method for the solution of the electromagnetic ring network solution to solve the problems in the prior art that when the electromagnetic ring network is located in the outgoing channel of the power grid at the sending end, it is difficult for operators to construct and the cost of solution is high.
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[0027] For ease of understanding, the method for de-ringing the electromagnetic ring network provided by the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
[0028] refer to Figure 1-2 , the electromagnetic ring network is located in the outgoing channel of the power grid at the sending end, and the method for unwinding the electromagnetic ring network provided by the embodiment of the present invention includes the following steps:
[0029] Step 1. Obtain the de-loop point of the electromagnetic ring network, and add a de-loop flexible DC back-to-back system at the de-loop point to construct a virtual de-loop solution;
[0030] Step 2, de-loop the electromagnetic ring network through the virtual de-loop solution, and obtain the critical active power value of the flexible DC back-to-back system under the condition of ensuring the stability of the operating frequency of the isolated grid of the sending-end pow...
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The invention discloses a design method for a looping-off scheme of an electromagnetic looped network, relates to the field of DC power transmission and aims to solve problems of large construction difficulties of operation workers and high looping-off cost when an electromagnetic looped network is disposed in an outward supply channel of a supply end power grid in the prior art. The design methodfor the looping-off scheme of the electromagnetic looped network includes acquiring a looping-off point of the electromagnetic looped network and constructing a virtual looping-off scheme through adding a looping-off flexible DC back-to-back system at the looping-off point; acquiring a critical active power value of the flexible DC back-to-back system in a condition of ensuring the stability of isolated power system operation frequency stability of a supply end; determining the looping-off cost of the added flexible DC back-to-back system according to the critical active power value of the flexible DC back-to-back system; determining whether the virtual looping-off scheme is adopted as a target looping-off scheme according to size relationship of the looping-off cost and the estimated looping-off cost of the electromagnetic looped network. The design method for the looping-off scheme of the electromagnetic looped network is used for the outward supply channel of the supply end power grid.
Description
technical field [0001] The invention relates to the technical field of direct current transmission, in particular to a design method of an electromagnetic ring network solution solution. Background technique [0002] With the continuous development of the power grid system, one or more electromagnetic ring networks will appear in most of the power grid systems. The electromagnetic ring network is also called high-voltage and low-voltage electromagnetic ring network. It refers to two sets of lines operating at different voltage levels. connections run in parallel. [0003] The existence of the electromagnetic ring network brings many uncertain factors to the development of the power grid system. When the electromagnetic ring network is located in the outgoing channel of the power grid at the sending end, once the high-voltage line in the electromagnetic ring network trips, the power flow of the power grid system will flow to the electromagnetic ring network. The transfer of ...
Claims
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IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 康鹏张东辉林成刘蔚孙斌杨健马覃峰程兰芬欧阳可凤徐敏
Owner ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD