User side reactive power compensation device balance monitoring method
A technology of compensation equipment and balance, applied in reactive power compensation, reactive power adjustment/elimination/compensation, measuring electricity, etc., can solve problems such as reducing compensation effect, unbalanced three reactive power compensation capacitors, and difficulty in detection, etc. To achieve the effect of improving operating efficiency
Active Publication Date: 2019-06-25
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD QUZHOU POWER SUPPLY CO
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Problems solved by technology
The imbalance of the three reactive power compensation capacitors will reduce the compensation effect
But it cannot solve the problem that the balance fault of reactive power compensation equipment is difficult to detect
Method used
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[0016] The specific embodiments of the present invention will be further specifically described below through specific embodiments in conjunction with the accompanying drawings.
[0017] Such as figure 1 As shown, it is a flow chart of the method for monitoring the balance of reactive power compensation equipment on the user side of the present invention, which is suitable for users who use three-phase smart user meters, and includes the following steps: A) Read the reverse flow alarm information of the user meters at a period T , if there is no power flow reverse alarm information, repeat this step, otherwise enter step B; B) read the reverse power flow data of the user meter, if the number of reverse power flow data is less than the set value N, then return to step A, otherwise Go to step C; C) read the user's historical load curve, and sample the user's historical load curve and power flow reverse curve respectively with the set sampling frequency fc, and obtain the user's ...
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The invention relates to the technical field of fault monitoring of a distribution network, and in particular relates to a user side reactive power compensation device balance monitoring method. The method comprises the steps that A) in the case of no power flow reverse alarm information, the step is repeated, and otherwise step B is carried out; B) if the amount of reverse power flow data is lessthan a set value N, step A returns; C) a user historical load curve is read to acquire the user historical load curve sample value vector s=(s1, s2,..., sn) and the power flow reverse curve sample value vector p=(p1, p2,..., pn), wherein n is the total number of data sampling; D) whether reverse power flow occurs only at low load, and if so, step E is carried out; and E) whether the ratio gy of the power flow reverse duration to the low load duration exceeds a threshold Gy, and if so, the balance of a user reactive power compensation device is faulty. The method provided by the invention hasthe advantages that the unbalanced reactive power compensation device is discovered and repaired in time, and the operating efficiency of a power grid is improved.
Description
technical field [0001] The invention relates to the technical field of distribution network fault monitoring, in particular to a user-side reactive power compensation equipment balance monitoring method. Background technique [0002] Reactive power compensation is an important way to improve the power factor of the grid. Reasonable selection of compensation devices can minimize the loss of the power grid and improve the quality of the power grid. On the contrary, if it is improperly selected or used, it may cause many consequences such as power supply system, voltage fluctuation, and harmonic increase. Reactive power compensation can be divided into: high-voltage centralized compensation, low-voltage group compensation and low-voltage local compensation according to its installation location and wiring method. Among them, the in-situ compensation area is the largest and the effect is good. But its total capacitor installation capacity is larger than the other two methods,...
Claims
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Login to View More IPC IPC(8): G01R31/00H02J3/18
CPCY02E40/30
Inventor 严俊潘艳红项秋涛谢念慈邵星驰余圣彬
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD QUZHOU POWER SUPPLY CO