A method and system for optimizing user voltage regulation including distributed photovoltaic
A distributed photovoltaic and voltage regulation technology, applied in photovoltaic power generation, AC network voltage adjustment, electrical components, etc., can solve the problems of poor operation reliability, high failure rate, complex operation mode, etc.
Active Publication Date: 2019-01-08
STATE GRID HUNAN ELECTRIC POWER +2
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The advantages of the former are simple operation, simple structure and low failure rate, but the reliability of operation is not very good; the advantage of the latter is that it can better deal with the relationship between the safety and economy of the power system, but the operation mode is complicated and the failure rate is high
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[0035] Such as figure 1 As shown, the implementation steps of the user voltage optimization adjustment method including distributed photovoltaic in this embodiment include:
[0036] 1) Obtain the user's voltage prediction value based on the user's load and distributed photovoltaic output prediction;
[0037] 2) Divide the voltage range into a plurality of voltage intervals, and determine the target voltage interval corresponding to the voltage prediction value;
[0038] 3) For the target voltage range that does not meet the voltage qualification requirements, the target control command is generated according to the target voltage range. The target control command includes various user voltage adjustment equipment and its compensation amount in the power grid containing distributed photovoltaics; the target control command is online Simulation, if the online simulation result does not meet the qualified voltage requirements, then skip to step 3); otherwise, if the online simul...
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The invention discloses a user voltage optimization regulation method and system containing distributed photovoltaic. The method comprises the following steps: predicting and obtaining a voltage prediction value of a user, and determining a target voltage interval corresponding to the voltage prediction value; Aiming at the target voltage interval which does not meet the voltage qualification requirement, the target control command is generated according to the target voltage interval, and the target control command is simulated on line. If the on-line simulation result does not meet the voltage qualification requirement, the new target control command is generated again. If the on-line simulation results meet the requirements of voltage qualification, the user voltage regulating equipmentin the power network with distributed photovoltaic is controlled to regulate the user voltage according to the target control instructions. The invention dynamically adjusts the priority of reactivepower compensation modes of different voltage grades according to the interval where the voltage is located, and adjusts the reactive power compensation device through on-line simulation to find the best adjustment method, which has good optimization effect and can greatly improve the qualified rate of the voltage of the user and the power consumption experience of the low-voltage user.
Description
technical field [0001] The invention relates to a distribution network voltage and reactive power optimization technology, in particular to a user voltage optimization and adjustment method and system including distributed photovoltaics. Background technique [0002] At present, some 10kV buses in some substations have phenomena such as voltage over-limit operation, unreasonable gear setting, too long power supply radius or too thin wire diameter of low-voltage lines, and unbalanced three-phase loads. The problem of substandard voltage quality is prominent, and the user voltage complaint rate is high. In recent years, distributed photovoltaic power sources have developed rapidly. Distributed photovoltaics connected to distribution networks can achieve local energy balance and avoid investment in long-distance power transmission. However, a large number of distributed photovoltaics will bring new challenges to distribution network voltage control. challenge. The access of di...
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Login to View More IPC IPC(8): H02J3/16H02J3/38
CPCH02J3/16H02J3/383H02J2203/20Y02E10/56Y02E40/30
Inventor 宁志毫王灿张可人左剑邓威葛强
Owner STATE GRID HUNAN ELECTRIC POWER