A voltage regulation method for distribution network considering source-load coordination

A voltage regulation and distribution network technology, applied in the direction of AC network voltage adjustment, power network operating system integration, photovoltaic power generation, etc., can solve the problems that are not conducive to ensuring energy utilization, increasing the cost of energy storage and reactive power compensation devices, and lack of coordination And other issues

Inactive Publication Date: 2018-12-21
SHANDONG UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0004] For the distribution network voltage control method containing photovoltaic power sources, the reduction of photovoltaic active power is not conducive to ensuring energy utilization; the cost of adding energy storage and reactive power compensation devices is high, and in the environment where a large number of distributed power sources are connected, economical problems Further consideration is needed; the method of regulating voltage only through the rea

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  • A voltage regulation method for distribution network considering source-load coordination
  • A voltage regulation method for distribution network considering source-load coordination
  • A voltage regulation method for distribution network considering source-load coordination

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Embodiment 1

[0079] The embodiment of the present invention provides a distribution network voltage control method considering source-load coordination. By judging whether the power system has a voltage exceeding the limit at a certain moment, it is determined whether the voltage value at that moment exceeds the upper limit or the lower limit. In this way, corresponding distribution network voltage regulation strategies are adopted to maintain voltage stability.

[0080] In a possible implementation, the process of adopting a corresponding distribution network voltage control strategy to maintain voltage stability is specifically: if the specified voltage upper limit is exceeded, the grid-connected photovoltaic power generation participating in the regulation in the power system The system, electric vehicles, and OLTC determine the regulation and control capacity; if the lower limit of the specified voltage is exceeded, capacitors are added for controllable resource coordination, so as to r...

Embodiment 2

[0085]figure 1 It is a flow chart of a distribution network voltage regulation method considering source-load coordination according to an exemplary embodiment; a distribution network voltage regulation method considering source-load coordination provided by an embodiment of the present invention includes the following details step:

[0086] Step 1: Use the forward push-back algorithm to calculate the voltage of each node in the distribution network, and generate the initial operating state of the distribution network;

[0087] Step 2: Determine whether the voltage of each node in the distribution network is within the specified range of the voltage expectation value. If the voltage of each node is within the specified range, directly output the voltage value of each node, and the voltage regulation is completed; if the voltage of each node is not within the specified range, Go to step 3;

[0088] Step 3: Judging whether the voltage exceeds the upper limit, if the voltage val...

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PUM

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Abstract

The invention relates to a voltage control method for distribution network considering source-load coordination. The method calculating voltages of each node in distribution network, and directly outputting and ending the voltage regulation if the voltages of each node are within a prescribed range, Otherwise, determining whether the voltage exceeds the upper limit or not, and if the voltage valueexceeds the prescribed upper limit value at this time, carrying out the voltage control by using the source-charge coordinated voltage control model of a photovoltaic, an electric vehicle and an on-load tap changer; Otherwise, inducing the capacitor in the control measures to exceed the lower limit value, and the voltage control model including photovoltaic, electric vehicle, on-load tap changerand capacitor will be used to control the voltage. The optimal solution of the voltage regulation model of source-charge coordination is used to regulate the voltage. Combined with the interaction among load side, power side and grid side, considering the uncertainty condition and demand side response characteristics, it solves the problem of distribution network voltage exceeding limit under different meteorological factors considering photovoltaic grid-connected.

Description

technical field [0001] The invention relates to the technical field of voltage control of power system distribution network, in particular to a distribution network voltage control method considering source-load coordination. Background technique [0002] In the traditional distribution network voltage, the uncertain factors affecting the voltage level are mostly load fluctuations, while in the voltage control of the distribution network containing distributed generation (DG), since the output power of distributed generation units is affected by weather and region Due to natural influence, the uncertain factors in the distribution network increase. At the same time, in the voltage control of the distribution network containing DG, the voltage of each bus is the object of voltage control. If the capacity of the connected DG is too large and the distribution points are too large, the phenomenon of power reverse will occur, resulting in the voltage of the distribution network b...

Claims

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Application Information

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IPC IPC(8): H02J3/14H02J3/38H02J3/50
CPCH02J3/14H02J3/383H02J3/50H02J2203/20Y02B70/3225Y02E10/56Y04S20/222
Inventor 张新慧郭瑶彭克
Owner SHANDONG UNIV OF TECH
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