A Debugging Method of Frequency Limit Control
A technology of frequency limit control and debugging method, applied in the direction of power transmission AC network, etc., can solve problems such as equipment and personnel loss, operation instability, failure of DC transmission system debugging tasks, etc., to reduce the risk of instability and reduce safety risks Effect
Active Publication Date: 2018-07-20
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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[0004] However, in the commissioning work of the existing frequency limit control, the AC power grid is prone to unstable operation, especially the AC power grid at the receiving end with a small short-circuit ratio, which is easy to run unstable during on-site commissioning
However, the unstable operation of the AC power grid will bring greater safety risks to the on-site commissioning of the DC transmission system, which will affect the project cost and construction progress of the DC transmission system at the slightest, and lead to the failure of the commissioning task of the DC transmission system, or even cause equipment and personnel loss
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[0019] For ease of understanding, the debugging method for frequency limit control provided by the embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0020] As mentioned in the background technology, in the prior art, there is a problem of high safety risk in on-site commissioning of the DC transmission system. The simulation injection time of the system simulation injection frequency deviation signal needs to be at least 1500ms, which leads to the continuous adjustment and change of the DC power transmitted by the DC transmission system for a long period of time, which is likely to pose a threat to the stable operation of the AC power grid, especially if there is a small short circuit Compared with the AC grid at the receiving end, the continuous fluctuation of DC power is likely to make the operation of the AC grid at the receiving end unstable, which brings greater safety risks to the on-site commissioning o...
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The invention discloses a frequency limitation control debugging method, which relates to the technical field of DC power transmission system debugging for reducing safety risks of DC power transmission system field debugging. The frequency limitation control debugging method comprises steps: a pole control system of the DC power transmission system is started; the pole control system controls DC power transmitted by the DC power transmission system to be enhanced to preset power, and frequency limitation control for the DC power transmission system is controlled to be started; after the frequency limitation control is started, the pole control system injects frequency offset signal simulation to the DC power transmission system, and the injection time length is kept to be 450 ms to 550 ms; according to interference influences on the DC power by the frequency offset signals, the frequency limitation control regulates the DC power to enable the DC power to be restored to the preset power; and the pole control system records and stores fluctuation changes of the DC power after the frequency offset signals are injected. The frequency limitation control debugging method provided by the invention is used for DC power transmission system field debugging.
Description
technical field [0001] The invention relates to the technical field of direct current transmission system debugging, in particular to a debugging method for frequency limit control. Background technique [0002] In the DC transmission system, the frequency limit control means that when the AC grid on both sides of the DC transmission system fluctuates due to interference, the frequency affected by the interference can be stabilized by adjusting the DC power delivered by the DC transmission system. In the on-site commissioning before the HVDC transmission system is completed and put into operation, the frequency limit control, as an integral part of the additional stability control function of the HVDC transmission system, also needs to be debugged to ensure that the frequency limit control can meet the use requirements. [0003] At present, the debugging of the frequency limit control is mainly completed through the control of the pole control system of the DC transmission s...
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IPC IPC(8): H02J3/36
CPCY02E60/60
Inventor 杨煜曹润彬刘天皓
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD