Coordinated matching method for flexible DC power transmission and stability control system in flexible electromagnetic loop network structure
A technology of electromagnetic ring network and DC transmission system, which is applied in the field of information collection, can solve the problems of too large and too small stability control measures, and achieve the effects of increasing utility, increasing operability, and reducing switching loss
Inactive Publication Date: 2017-02-08
ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD +1
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is: to provide a method for coordination and cooperation of the flexible and stable control system under the structure of the flexible electromagnetic ring network, and to solve the problem of normal During operation, through the control of active power and reactive power, the structure of the electromagnetic ring network meets the safety and stability check, and the flow of reactive power in the high-voltage line of the electromagnetic ring network is reduced. However, after the flexible DC is connected, due to the fault of the high-voltage line It is no longer distributed according to the natural power flow, but is affected by the soft direct power. Therefore, if the stability control measures under severe faults do not consider the adjustment effect of the DC power, the problem of too large or too small stability control measures may occur
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[0021] Below in conjunction with accompanying drawing and specific embodiment the invention is further introduced:
[0022] Such as Figure 1~2 As shown, a flexible and stable control system under the flexible electromagnetic ring network structure, including system A, system B and DC transmission system, system A and system B are connected through high-voltage grade line AB and low-voltage grade line CDE to form a ring network; the DC transmission system is in the DE line of the low-voltage line CDE.
[0023] During the test, prepare connection lines, IGBT full-control devices, construction tools, etc. according to this technical plan.
[0024] According to the technical plan, first connect system A and system B together with a high-voltage transmission line, then use a cable to connect system A from node C to converter station A to form a CD line, and then use a cable to connect system B to node E to converter station B, and connect converter station A and converter statio...
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The invention discloses a coordinated matching method for a flexible DC power transmission and stability control system in a flexible electromagnetic loop network structure. The system comprises a system A, a system B and a DC power transmission system. The system A and the system B are connected through a high-voltage-grade line AB and a low-voltage-grade line CDE and form a loop network. The DC power transmission system is in the DE line of the low-voltage-grade line CDE. The coordinated matching method settles a problem of overlarge or oversmall stability control measure amount which may occur without consideration of a DC power adjustment function in a stability control measure for a severe fault caused by a fact that trend is not distributed according to a natural trend after the fault of the high-voltage-grade line after flexible DC current is input, wherein the electromagnetic loop network structure satisfies safety verification and stability verification through active power control and reactive power control in normal operation, and flow of reactive power in the high-voltage-grade line of the electromagnetic loop network is reduced.
Description
technical field [0001] The invention relates to a flexible straightening and stable control system and a coordination and cooperation method, in particular to a coordination and cooperation method of a flexible straightening and stable control system under a flexible electromagnetic ring network structure, which belongs to the technical field of information collection. Background technique [0002] The electromagnetic ring network is a phased product of the development of the power grid. It is inevitable in a certain period of time. my country's power transmission network is in the process of continuous development and strengthening. During the construction of high-voltage grids, several electromagnetic ring networks will be formed. Considering the reliability of power supply, There are many factors in the power transmission capacity, and some electromagnetic ring networks do not have the conditions for de-looping, which brings certain risks to the safe and stable operation of...
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IPC IPC(8): H02J3/36H02J3/06
CPCH02J3/06H02J3/36Y02E60/60
Inventor 林成孙斌马覃峰欧阳可凤刘明顺康鹏王新宝付俊波俞秋阳常宝立
Owner ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD