Comprehensive energy system tie line power control method

Abstract

The invention provides a comprehensive energy system tie line power control method, which comprises the following steps of: (1) establishing a comprehensive energy optimization scheduling model for dynamically coupling energy supply and production, and calculating to obtain a day-ahead energy production optimization plan and a tie line power plan reference value; (2) based on the real-time power balance equation of each energy subsystem in the comprehensive energy system, constructing a state space model of the comprehensive energy system participating in tie line power control; (3) equivalently converting the state space model of the tie line power control into a quadratic programming model, solving the model by adopting a sequential quadratic programming algorithm, and obtaining adjustable equipment power adjustment quantities of the current time period to the last T control time periods; and (4) issuing the power regulation quantity of the current time period to the first time period after the current time period, and sampling the real-time state of the comprehensive energy system for feedback correction. According to the invention, the tie line power of the integrated energy system is accurately controlled in a complex time-varying environment, and the tie line power of the integrated energy system is ensured to meet the examination of superior power grid departments.

Description

technical field [0001] The invention relates to a power control method for tie lines of an integrated energy system, and belongs to the technical field of energy management of the integrated energy system. Background technique [0002] The integrated energy system with industrial parks as the main body has the characteristics of regional concentration, various types of energy operation equipment, obvious energy supply rules, and complementary resources. At the same time, the park load is stable and the level of automation is high. Compared with commercial and residential users, it has greater response Capacity is an important demand response resource to participate in the interaction under the background of energy market reform. When the integrated energy system of an industrial park participates in the regulation of the energy market, its energy management center needs to uniformly optimize scheduling and management of various internal energy sources, and respond quickly ba...

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Problems solved by technology

The literature "Precise Power Flow Control of Microgrid Tie-Line Based on Multi-Agent System" and "Smoothing Method of Power Fluctuation of Micro-Grid Tie-Line Using Residential Temperature Control Load Control" also proposed distributed multi-intelligence for power control of micro-grid tie-line. However, in general, these schemes are lagging control and adjustment processes, and cannot predict the change trend of tie line power and carry out advanced adjustment, which will lead to untimely unit power response and contact failure. Large line control error and other problems

Although the patent CN201710236059.4 'An Energy Storage Forward-looking Distributed Control Method for Smooth Microgrid Tie-Line Power' considers the forward-looking of energy storage control and performs smooth advance adjustment of tie-line power, it only targets pure electric networks. It does not involve the complementary adjustment capabilities of multi-energy networks and equipment, nor does it consider the differentiated characteristics of multiple sub-energy systems participating in tie-line adjustment, which has certain limitations.

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