CN-121840762-B - Energy management method of zero-carbon building light storage direct-flexible power supply and distribution system

CN121840762BCN 121840762 BCN121840762 BCN 121840762BCN-121840762-B

Abstract

The invention relates to the field of building energy management, and discloses an energy management method of a zero-carbon building light storage direct-flexible power supply and distribution system. The invention aims to solve the technical pain points of unbalance of power supply and demand and instability of bus voltage caused by resource regulation limitation and rough control strategy under the condition of bilateral random fluctuation of source load in the existing energy management method. According to the invention, the digital mapping of the environmental data and the load power is constructed, and quantized into the equivalent electric energy regulating capacity, so that the cooperative linkage of the building body and the energy storage device is realized. The method is characterized by generating a power prediction curve and a power distribution scheme to realize self-sufficiency of electric energy, and constructing a closed-loop control system which maintains voltage stabilization and energy scheduling in a fused manner by adopting a sectional voltage adjustment logic and a closed-loop convergence algorithm with variable step length. The self-consistency rate and the robustness of the building under the complex working condition are obviously improved, and the safety and the stability of the power supply and distribution system are effectively ensured.

Inventors

Xing Qianshuai
MIAO JIE
XU JIAN
ZHAO JUN

Assignees

淮安鑫佑鹏科技有限公司
江苏德华杰能建筑科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260316

Claims (7)

1. An energy management method of a zero-carbon building light storage direct-flexible power supply and distribution system, which is characterized by being executed by computer equipment and comprising the following steps of: s1, acquiring multidimensional operation data of a building, analyzing to acquire equivalent electric energy regulation capacity of the building, and generating predicted photovoltaic power generation power according to the acquired predicted climate data; S2, calculating a deviation value of the actual running power of the adjustable load and the power distribution scheme based on the equivalent electric energy adjustment capacity and the predicted photovoltaic power generation power distribution scheme, and adjusting the running states of the adjustable load and the energy storage device according to the deviation value; S3, obtaining bus voltage in the adjustment process, and adjusting compensation current according to the bus voltage to ensure voltage stability; s4, continuously adjusting until the deviation value converges to a preset threshold value; The method for analyzing and obtaining the equivalent electric energy adjustment capacity of the building in the step S1 comprises the steps of capturing a change track of indoor temperature after a user interrupts environment control equipment by himself, calculating heat insulation performance of the building under different environment data based on the change track, synthesizing the heat insulation performance of the building and electric data, calculating the electric quantity required by the operation of an adjustable load, and converting the required electric quantity into the equivalent electric energy adjustment capacity; In the step S2, the power distribution scheme is generated according to the principle that the distribution scheme is formulated according to the equivalent electric energy regulation capacity, if the predicted photovoltaic power generation power is larger than the rigid load, the redundant electric quantity is distributed to the flexible load and the energy storage device according to the actual situation, if the predicted photovoltaic power generation power is smaller than the rigid load, the notch electric quantity is discharged and supplemented by the energy storage device, if the electric quantity of the energy storage device is lower than the preset interval, the operation power of the flexible load is reduced in the adjustable range, and if the flexible load exceeds the adjustable range and an electric quantity notch still exists, the power is taken from an external power grid; The method for adjusting the running states of the adjustable load and the energy storage device according to the deviation value comprises the steps of calculating the deviation of the actual running power of the adjustable load relative to the power distribution scheme, reducing the power deviation of the adjustable load by adjusting the charging and discharging states of the energy storage device, adjusting the adjustable load within a floating range according to the floating range of the power set by a user, and controlling the electric equipment to idle and consume redundant electric quantity if the adjustable load reaches the maximum adjusting capacity and the energy storage device is full.
2. The energy management method of the zero-carbon building light storage direct-flexible power supply and distribution system according to claim 1 is characterized in that in the step S1, multi-dimensional operation data of a building are obtained, wherein the multi-dimensional operation data comprise environment data and electrical data, the environment data comprise illumination intensity, indoor and outdoor temperatures, wind speed and humidity, and the electrical data comprise bus voltage, adjustable load operation power and heating power of a cable.
3. The energy management method of the zero-carbon building light storage direct-flexible power supply and distribution system according to claim 1 is characterized in that in the step S1, the process of generating predicted photovoltaic power generation power comprises the steps of searching a historical daily power generation power curve similar to acquired predicted climate data to serve as a reference curve, correcting the reference curve according to the predicted climate data and the installation year dynamics of a photovoltaic module to form a predicted power curve, monitoring current actual power generation power, and if deviation exists between the actual power generation power and the predicted power generation power, adjusting the predicted power curve according to the deviation.
4. The energy management method of the zero-carbon building light storage direct-flexible power supply and distribution system according to claim 2 is characterized in that in the step S3, specific logic for adjusting compensation current according to bus voltage is that the deviation amount of the obtained bus voltage relative to a rated value is calculated, if the deviation amount is within a preset safety threshold, the bidirectional converter is kept silent, if the deviation amount exceeds the safety threshold, the bidirectional converter is controlled to output compensation current proportional to the deviation amount, and if the voltage change rate is detected to exceed a set rate threshold, the bidirectional converter is controlled to output large current to prevent voltage mutation.
5. The method for energy management of a zero-carbon building light-storage direct-flexible power supply and distribution system according to claim 1, wherein in the step S4, the process of continuously adjusting until the deviation value converges comprises the steps of determining an adjustment amplitude according to the magnitude of the deviation value until the deviation value is within a preset safety threshold, and stopping adjusting the bus voltage.
6. The energy management method of the zero-carbon building light-storage direct-flexible power supply and distribution system according to claim 2, further comprising a battery health protection mechanism, wherein the method specifically comprises the steps of limiting the energy storage device to charge and discharge only in an electric quantity interval set by a user in a non-emergency condition, and limiting the charge and discharge power of the energy storage device if the ambient temperature of the energy storage device exceeds a preset temperature range.
7. The method of claim 6 wherein the logic for performing the continuous adjustment further comprises setting a command response wait time after the power adjustment command is issued, and disabling the transmission of new commands until the wait time is completed, thereby preventing the repetition of adjustments and accumulation of commands.

Description

Energy management method of zero-carbon building light storage direct-flexible power supply and distribution system Technical Field The invention relates to the technical field of building energy management, in particular to an energy management method of a zero-carbon building light storage direct-flexible power supply and distribution system. Background The zero-carbon building is used as an important carrier for realizing energy conservation and emission reduction, and photovoltaic power generation, an energy storage device, direct-current power distribution and adjustable load are integrated in the zero-carbon building, so that the self-sufficiency of electric energy is realized. In prior art systems, energy management systems often rely on preset fixed policies or simple logic decisions when scheduling units. For example, when the photovoltaic power generation is sufficient, the power is directly supplied, and when the photovoltaic power generation is insufficient, the power is switched to the power grid to take power or the energy storage device to discharge. This traditional scheduling mode can cope with a single, stable scenario, and its core logic is often to consider the building as a passive energy acceptor, focusing on supply matching at the power supply end. However, in actual operation, zero-carbon construction tends to face more complex equilibrium challenges. The photovoltaic power generation has extremely strong randomness and volatility, is extremely easily influenced by environmental factors such as cloud cover, weather mutation and the like, so that power fluctuation is generated, and meanwhile, the characteristics of energy consumption in the building often show rigidity and can not be interrupted. Existing energy management methods tend to respond to hysteresis or coarseness of regulation in response to such bilateral random fluctuations in source charge. The dislocation relation between the supply and the demand of the electric energy not only can cause the accelerated aging of the energy storage device due to frequent and deep charging and discharging, but also can cause the oscillation and even out-of-limit of the voltage of the direct current bus to be easily caused by frequent power fluctuation, thereby causing the breakdown of a circuit system and seriously affecting the stability and the safety of a zero-carbon building power supply and distribution system. Disclosure of Invention The present invention has been made in view of the above-described problems occurring in the prior art. Therefore, the invention provides an energy management method of a zero-carbon building light storage direct-flexible power supply and distribution system, which solves the technical pain points of unbalanced supply and demand of load electric quantity and unstable bus voltage caused by fixed adjustment strategy, simple logic judgment and single dispatching mode of the existing photovoltaic power generation energy management system. In order to solve the technical problems, the invention provides the following technical scheme: the invention provides an energy management method of a zero-carbon building light storage direct-flexible power supply and distribution system, which comprises the following steps, S1, acquiring multidimensional operation data of a building, analyzing to acquire equivalent electric energy regulation capacity of the building, and generating predicted photovoltaic power generation power according to the acquired predicted climate data; S2, calculating a deviation value of the actual running power of the adjustable load and the power distribution scheme based on the equivalent electric energy adjustment capacity and the predicted photovoltaic power generation power distribution scheme, and adjusting the running states of the adjustable load and the energy storage device according to the deviation value; S3, obtaining bus voltage in the adjustment process, and adjusting compensation current according to the bus voltage to ensure voltage stability; and S4, continuously adjusting until the deviation value converges to a preset threshold value. The energy management method of the zero-carbon building light storage direct-flexible power supply and distribution system comprises the following steps that in the step S1, multi-dimensional operation data of a building are obtained, wherein the environment data comprise illumination intensity, indoor and outdoor temperature, wind speed and humidity, and the electrical data comprise bus voltage, adjustable load operation power and heating power of a cable. The method for analyzing and obtaining the equivalent electric energy regulation capacity of the building in the step S1 comprises the steps of capturing a change track of indoor temperature after a user interrupts environment regulation equipment by himself, calculating heat preservation performance of the building under different environment data based on the change track, calculating e