Energy management system
The energy management system adopts hierarchical distributed system architecture. Collect and process the energy consumption data of electricity, gas, water and other categories of buildings or factories, and analyze the status of energy consumption. Through energy planning, energy monitoring, energy statistics, energy consumption analysis, key energy consumption equipment management, energy metering equipment management and other means, enterprise managers have an accurate grasp of the proportion of energy cost and the development trend of enterprises. And decompose the energy consumption plan task of the enterprise into the workshop of each production department, make the responsibility of energy saving work clear, and promote the healthy and stable development of the enterprise.
User requirements for energy management
Optimize the allocation of local energy:
Improve the utilization rate of local multi-energy, achieve the coordinated fitting of local multi-energy, complement each other;
Local load electricity management:
Collect the power characteristics of local electrical equipment and production line, optimize the distribution scheme of electrical equipment;
Stable local energy supply:
Combined with the demand of local power supply and electrical equipment, to provide long-term and stable energy supply and related services;
Energy management system function
The system collects PCS, BMS, box transformer protection measurement and control device, metering electric meter, isolated island protection device, public measurement and control device, 10KV line protection measurement and control device and other equipment telemetry and remote transmission data.
Analog data: describe the real-time quantitative value of energy system operation, including energy storage, distribution and other data, analog processing functions: data filtering, zero drift processing, limit inspection, jump inspection, manual input and other state variables: including switching and multi-state digital, Specifically, the battery state, switch position, isolation knife gate, grounding knife gate position, protection hard contact state and AGC remote input signal and other semaphores;
The database is used in combination with real-time database and historical database. Real-time database is a kind of host database, which relies on relational database to save information, such as database schema description, database backup, data section preservation and recovery and so on.
According to the different importance of internal load in microgrid system, hierarchical management is carried out. The key load in the system is regarded as the primary load, the more important load as the secondary load, and the conventional load as the third stage load.
Energy storage strategy is the core function of energy management system. It can analyze the real-time state information of equipment, distributed power generation forecasting, user load forecasting and other energy consumption information. Through coordinated optimization algorithm, the control strategy is determined, the load and energy storage are reasonably arranged, the power generation, load and energy storage are coordinated with each other, the clean energy is fully utilized, and the energy optimization and coordination control is realized in combination with countercurrent control.
Energy storage management
The system can access the battery management system (BMS), of each energy storage unit at any time to obtain the charge state of each energy storage unit. At the same time, through the continuous management and monitoring of the battery management system, we can further understand the operating environment, operating conditions, battery performance status and other information of the energy storage unit.
Real-time monitoring is mainly to monitor the operation state of key equipment such as energy storage unit and box transformer in real time. Through remote real-time monitoring, power station managers and operation and maintenance personnel can comprehensively and intuitively understand the operation of key equipment of power station through power station production simulation diagram, trend diagram, bar diagram and parameter classification table, and grasp the abnormal information of equipment in time and accurately.
This function realizes the statistics and processing of each data information, and can generate and output each historical report, such as energy storage data recording table (charging and discharging power, real-time power), energy storage data curve analysis diagram, power curve of each power load;
Electricity charge management
Charge the battery when the electricity price is low, and discharge the battery to the local load at the peak of the electricity price, by buying low and selling arbitrage or reducing the cost of local electricity. The main factors affecting the income are peak and valley electricity price, in addition, the efficiency of the energy storage system, discharge time and related subsidies will also directly affect the amount of income;
The operation monitoring system has the functions of accident alarm and prediction alarm. The accident alarm includes the circuit breaker tripping and the action signal of the protection device caused by abnormal operation, and the warning alarm includes the general equipment displacement, the abnormal state information of the state, the excess limit of the analog quantity or temperature measure, the abnormal state of the software and hardware of the computer system, and so on.
1. Field equipment unit
Product 1: type of energy monitoring and control cabinet low voltage distribution
Product 2: energy monitoring integrated machine type: energy monitoring;
Accessories: accessories for photovoltaic cables and connectors, as well as solar panel fixtures
Note: the integrated energy monitoring machine can realize the local energy monitoring and management, and connect with the local energy network.
2. Energy control unit
Product 1: microgrid controller type: energy control;
Accessory 1: fast measurement and control module, which is a controlled unit module for fast collection of local power grid information and rapid execution.
Accessories 3: battery pack energy management, is the normal operation of lithium iron phosphate battery pack key products, responsible for monitoring and management of battery pack operation;
3. Cloud management unit
Product 1. Energy station level regulation and control
Type: remote coordination of energy control and trading between multiple energy stations;
Product 2. Energy management system
Type: cloud management system that provides main functions;
Product 3. Energy database management
Type: set up a separate database for a variety of energy sources to manage internal data;
4. Data application unit
Product 1. Data application development
Type: provide users with large screen display, mobile terminal application development services;
Product 2. Data communication interface management
Type: establish connections and multiple communication services to multiple enterprises for the database;
Actual project case
Project location: Xuzhou, Jiangsu Province
System type: optical storage and charging energy management system (grid-connected)
Electrical equipment: electricity consumption, security doorman, charging pile, lighting in the warehouse of the factory area
Project location: Wenzhou, Zhejiang Province
System type: optical storage source management system (grid-connected)
Electrical equipment: factory lighting, elevators, air conditioning, heating, energy trading