A comprehensive load optimization control method and system for multiple DC receiving end power grids
A receiving-end power grid and integrated load technology, which is applied in the field of DC transmission control and multi-DC receiving-end grid integrated load control, can solve problems such as low efficiency of model solution, difficulty in model solution, and real-time performance that cannot meet the demand.
Active Publication Date: 2021-01-15
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology
Some literatures have constructed an emergency load shedding optimization model considering transient safety constraints, and established a large-scale nonlinear programming model considering time domain constraints, but the solution of this model is very difficult, and the model solution efficiency is low due to time domain constraints
Other literatures have proposed a real-time decision-making method for emergency control of power systems based on SVM. By transforming the expression of SVM stability rules, a stability index that can represent the system stability margin and can be obtained in real time is obtained to analyze different emergency control schemes. The impact on system stability, but in the actual application of the power grid, the real-time performance of this real-time decision-making method can not meet the demand
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[0131] The technical solution of the present application will be further introduced in detail below in conjunction with the accompanying drawings and specific embodiments.
[0132] Such as figure 1 Shown is a schematic flow chart of a comprehensive load optimization control method for multi-DC receiving-end power grids disclosed in this application. The comprehensive load optimization control method includes the following steps:
[0133] Step 1: Determine the control amount and priority of all loads to be controlled in the multi-DC receiving-end grid system;
[0134] Determine the priority of the loads to be controlled according to the power supply reliability requirements of different loads or user power supply agreements.
[0135] For power companies that have not undergone power market transformation, their priorities are determined according to the reliability requirements of power supply for different loads. The load with higher power supply reliability requirements has ...
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The present invention provides a multi-DC receiving terminal power grid integrated load optimization control method and system which are suitable for integrated load control of large-scale receiving terminal power grid DC locking faults. The method based on the safe and stable control policy of a power grid, comprises the steps of: calculating specific load control quantity of each substation, determining the minimum comprehensive load shedding capacity which can maintain the safety and stability of the multi-DC receiving terminal power grid system by employing the improved particle swarm optimization algorithm, and executing the load shedding operation according to the minimum comprehensive load shedding capacity. The integrated load optimization control method and the corresponding control system disclosed in the invention take the safe and stable control of the large-scale receiving terminal power grid as a target to lay a foundation for optimizing the installation of the power gridload-cutting device, improving the economical operation of the system, and ensuring the safety and stability of the system.
Description
technical field [0001] The application belongs to the technical field of electric power system control, and relates to direct current transmission control technology, in particular to a method and system for comprehensive load control of multiple direct current receiving end power grids. Background technique [0002] In recent years, with the rapid development of large-scale long-distance and high-capacity AC and DC transmission technologies, the DC power connected to the eastern power grid in my country has increased significantly, and the eastern power grid presents typical characteristics of the receiving end system. At the same time, due to the large-scale development of renewable energy such as wind power and photovoltaics, the conventional power supply of the eastern power grid is gradually replaced by external DC and local power electronic interface new energy power, and the overall inertia level of the system continues to decline. , the safety and stability of the re...
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IPC IPC(8): H02J3/06
CPCH02J3/06
Inventor 刘萌苏建军张国辉李宽李常刚李玉敦苏欣史方芳杨超赵斌超张婉婕黄秉青王永波李聪聪梁正堂石硕李娜佟新元王昕
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY