Active control method for voltage partition of urban distribution network with high proportion of controllable source loads

Abstract

The invention belongs to the field of power system protection and control, and relates to an active control method for the voltage partition of an urban distribution network with a high proportion of controllable source loads; the method divides the distribution network into multiple autonomous regions; According to the variation of regional active power, the ability of the controllable active capacity and controllable reactive capacity of the autonomous region to control the influence of active power changes on the node voltage is evaluated respectively; according to the evaluation results, the regional active power optimization model, regional reactive power optimization model and The regional active and reactive power coordination optimization model calculates the active and reactive power control reference values ​​of gas turbines, wind power sources, photovoltaic power sources, energy storage and electric vehicle charging piles; when the node voltage in the region exceeds the allowable range, its control reference value is switched to calculation Active active power control, active reactive power control or active power coordinated control can be implemented respectively.

Description

Technical field [0001] The present invention belongs to the field of power system protection and control, and involves the field of distribution network operation control, specifically refers to a protocator control method with high proportional controlled source of urban distribution grid voltage partition. Background technique [0002] Active distribution network with controllable distributed power supplies such as gas turbine, wind power supply, photovoltaic power supply, energy storage and electric vehicles, is the main trend of current distribution network development. Distributed power access can realize the local balance of energy distribution network, avoiding the investment and loss of long-distance transmission; however, the access to the distributed power supply also changes the power supply of the traditional distribution network. Mode, due to the randomness and volatility of the distributed renewable energy output power, add the randomness and significant load peak v...

AI Technical Summary

Problems solved by technology

At present, the commonly used method is to determine the optimal control reference value of the reactive power output of a distributed power supply through matrix calculation and optimal power flow according to the node voltage level, so as to improve the voltage of the distribution network by using the reactive power control of the distributed power supply. quality, but the control ability of this type of method is usually insufficient, and the coordination between distributed power sources is lacking, and the effect on the voltage control of the distribution network is limited

Under the condition of satisfying the voltage constraints, taking the minimum of network loss or the minimum of regulation cost as the objective function, the cooperative control of reactive power output of distributed generation is another common method of voltage control in distribution network with controllable source load. method, but the reactive power optimization of the whole network not only has economic and power quality problems, but also may cause the control effect to be difficult to meet the requirements, and the controllable source-load active power control has not been used to regulate the node voltage. Reactive power control capability is also often overlooked

At present, the voltage problem of the distribution network with a high proportion of controllable source loads cannot be solved, resulting in the quality of power supply of the distribution network failing to meet the requirements, and the risk of safe operation continues to increase

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