GB/T 51435-2021 English PDFUS$919.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 51435-2021: Technical standard for rural solid waste collection transportation and treatment Status: Valid
Basic dataStandard ID: GB/T 51435-2021 (GB/T51435-2021)Description (Translated English): Technical standard for rural solid waste collection transportation and treatment Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: P53 Word Count Estimation: 48,440 Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; State Administration for Market Regulation GB/T 51435-2021: Technical standard for rural solid waste collection transportation and treatment---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.1 General 1.0.1 This standard is formulated to standardize the design of wind-solar-storage combined power stations and promote the comprehensive utilization of renewable energy. 1.0.2 This standard is applicable to the design of the following combined power plants for grid-connected new construction, reconstruction and expansion with a power generation installed capacity of 10MW and above. 1 Wind power generation, photovoltaic power generation, electrochemical energy storage combined power station; 2 Combined wind power generation and electrochemical energy storage power station; 3 Photovoltaic power generation, electrochemical energy storage combined power station. 1.0.3 The design of wind-solar-storage combined power station should be based on the conditions of wind energy resources, solar energy resources and grid access conditions. 1.0.4 The design of the wind-solar-storage combined power station shall not only comply with this standard, but also comply with the current relevant national standards. 2 terms2.0.1 wind/PV/storage power plant wind/PV/storage power plant The combined power station formed by the combination of wind power generation, photovoltaic power generation and electrochemical energy storage is divided into wind power generation, photovoltaic power generation, electrochemical energy storage combined power station, wind power generation, electrochemical energy storage combined power station, photovoltaic power generation, electrochemical energy storage Energy storage combined power station. 2.0.2 wind turbine generator system (WTGS) A system that converts the kinetic energy of wind into electrical energy. 2.0.3 wind farm; wind power plant A power station consisting of a batch of wind turbines or groups of wind turbines, unit transformers, collection lines, main step-up transformers and other equipment. 2.0.4 photovoltaic (PV) module The smallest indivisible solar cell combination device with encapsulation and internal connection, which can provide DC output alone, is also called solar cell module. 2.0.5 Photovoltaic(PV) modules string In a photovoltaic power generation system, several photovoltaic modules are connected in series to form a circuit unit with a certain DC output. 2.0.6 photovoltaic (PV) power unit In a photovoltaic power station, a certain number of photovoltaic module strings are collected through a DC combiner box, and then boosted by an inverter and an isolation step-up transformer into a power supply that meets the frequency and voltage requirements of the grid, also known as a unit power generation module. 2.0.7 Photovoltaic(PV) array Several photovoltaic modules are mechanically and electrically assembled in a certain way, and a DC power generation unit with a fixed support structure, also known as a photovoltaic array. 2.0.8 photovoltaic (PV) power generation system A power generation system that directly converts solar radiation energy into electrical energy by using the photovoltaic effect of solar cells. 2.0.9 photovoltaic (PV) power station A power station mainly based on photovoltaic power generation systems, including buildings (structures) and auxiliary facilities such as maintenance, maintenance, and living. 2.0.10 smooth the output fluctuation of wind/photovoltaic Through the adjustment of the energy storage system, the active power of the grid-connected output can meet the fluctuation rate within a given period of time less than the set value. 2.0.11 track scheduled output Through the adjustment of the energy storage system, it meets the requirements of tracking the output curve of the wind-solar-storage combined power station issued by the power grid dispatching department. 2.0.12 peak load shifting Through the adjustment of the energy storage system, the load is charged during the low load period and discharged during the peak load period, thereby realizing the temporal and spatial translation of the load. 2.0.13 collector line It is divided into photovoltaic power station collector lines and wind farm collector lines. The power collection line of a photovoltaic power station refers to the transmission line that collects and transmits the AC power after the inversion and boost of each power generation unit to the substation in a photovoltaic power generation system with decentralized inverter and centralized grid connection; the power collection line of a wind farm refers to The power transmission line that collects and transmits the boosted electric energy of each wind turbine to the substation. 2.0.14 point of common coupling (PCC) The connection of more than one customer in the grid. 2.0.15 Point of coupling (POC) For a wind-solar-storage combined power station with a substation, it refers to the high-voltage side busbar or node of the substation; for a wind-solar-storage combined power station without a substation, it refers to the output aggregation point of the wind-solar-storage combined power station. 2.0.16 low voltage ride through low voltage ride through When the power system failure or disturbance causes the voltage drop of the grid-connected point of the wind-solar-storage combined power station, within a certain voltage drop range and time interval, the wind-solar-storage combined power station guarantees continuous operation without going off the grid. 2.0.17 High voltage ride through high voltage ride through When the grid accident or disturbance causes the voltage of the wind-solar-storage combined power station to rise, within the specified voltage increase range and time interval, the wind-solar-storage combined power station can guarantee continuous operation without going off the grid. 2.0.18 Maximum power point tracking (MPPT) The tracking control of the voltage and current changes of the photovoltaic array output keeps the DC output power of the photovoltaic array near the maximum power point, and the automatic adjustment function of the photovoltaic module to play the best performance. 2.0.19 solar time The solar time angle is used as the standard timekeeping system, and the true solar time is zero hour when the center of the sun is in the upper climax of the place. 2.0.20 Electrochemical energy storage station A power station that uses electrochemical cells as energy storage components for storage, conversion and release. 2.0.21 energy storage unit energy storage unit The smallest energy storage system consisting of a battery pack, a battery management system and a power conversion system connected to it. 2.0.22 rated power of converter The maximum power continuously and stably output by the converter under the rated voltage, current and environmental conditions is regarded as the rated power of the converter, that is, the rated power of the energy storage system. 2.0.23 Coordination monitoring and control system of combined power station monitoring system A monitoring system for coordinated control of wind power, photovoltaic, energy storage sub-systems and substations in wind-solar-storage combined power stations.3 basic rules3.0.1 Wind-solar-storage combined power station should be designed according to regional overall planning, wind energy resources, solar energy resources and land resources, power system conditions, installation and transportation and other factors, to meet the requirements of safety, reliability, economical applicability, environmental protection, aesthetics, and easy installation and maintenance requirements. 3.0.2 The wind-solar-storage combined power station design should adopt new technologies, new processes, new equipment and new materials while satisfying safety and reliability. 3.0.3 The design of wind-solar-storage combined power station should adhere to the principle of saving resources and comprehensively considering social and economic benefits, proceed from the overall situation, make overall plans, and combine short-term and long-term. ——the average value of wind power generation or photovoltaic power generation or the combined output of wind power generation and photovoltaic power generation in various time periods in a month; M - the total number of days in a month. 5.5 Analysis of power grid characteristics 5.5.1 The design of the power station shall analyze the ability of the surrounding power grid to accommodate the power station. 5.5.2 The ability of the power grid to accommodate power stations should be analyzed in conjunction with factors such as power system load characteristics, power supply structure, and peak-shaving capabilities. 5.5.3 The load characteristics of the power grid and the output characteristics of wind power and photovoltaic power generation should be comprehensively analyzed during the design of the wind-solar-storage ratio, and the power regulation capacity of the combined power station should meet the operation requirements of the power grid.6 combined power generation system6.1 General provisions 6.1.1 The combination ratio of wind-solar-storage combined power generation system should be determined according to wind energy and solar energy resource conditions, site conditions and functional requirements. 6.1.2 The wind-solar-storage combined power generation system should adopt a high-voltage AC current collection system. Different types of power generation forms should use relatively independent systems, and different power generation types should be reasonably combined according to the ratio requirements. 6.1.3 The collector voltage level of wind-solar-storage combined power generation system should be selected after technical and economic comparison, and the collector voltage of wind power generation system, photovoltaic power generation system and energy storage system should be consistent. 6.2 Combined power generation system ratio 6.2.1 The capacity ratio of the combined power generation system should be determined according to the operation requirements of the power grid and by studying the output characteristics of the wind-solar-storage combined system in typical days of each month. 6.2.2 The capacity ratio of the wind-solar-storage combined power generation system should be determined after technical and economic comparisons based on grid regulation modes such as smooth power output, tracking planned output, and peak-shaving and valley-filling of the power system, and should comply with the following regulations. 1 When the smooth power output mode is adopted, the rated power of the energy storage system configuration should not be less than 10% of the total installed power of wind power and photovoltaic power generation, and the continuous discharge time under the rated power should not be less than 0.5h; 2 When using the tracking plan output mode, the rated power of the energy storage system configuration should not be less than 30% of the total installed power of wind power and photovoltaic power generation, and the continuous discharge time under the rated power should not be less than 1h; 3 When adopting the system frequency modulation and peak shaving and valley filling modes, the energy storage system should be determined after optimization analysis according to the requirements of the power grid. 6.3 Selection of main equipment 6.3.1 The main wind power equipment should comply with the current national standard "Technical Regulations for Connecting Wind Farms to Power Systems" GB/T 19963, and the main equipment of photovoltaic power stations should comply with the current national standards "Technical Regulations for Connecting Photovoltaic Power Stations to Power Systems" GB/T 19963 According to the provisions of T19964, the main equipment of the energy storage power station shall comply with the provisions of the current national standard "Technical Regulations for Electrochemical Energy Storage System Connected to the Power Grid" GB/T 36547. 6.3.2 The configuration of wind turbines shall conform to the geographical environment of the wind farm area, wind energy resources, safety level, installation, transportation, operation and maintenance, etc., and shall comply with the provisions of the current national standard "Code for Design of Wind Farms" GB 51096. 6.3.3 The type of photovoltaic power generation module should be selected after technical and economic comparison according to the environmental conditions such as solar energy resources and working temperature. 6.3.4 The selection of inverters for photovoltaic power generation systems should comply with the provisions of the current national standard "Code for Design of Photovoltaic Power Stations" GB 50797; when the photovoltaic site has large fluctuations and the photovoltaic array is easily affected by shading, the inverter with multi-channel MPPT function should be selected. inverter or other equipment with similar functions. 6.3.5 The battery type selection of the energy storage system, the battery management system type selection, and the power conversion system type selection shall comply with the provisions of the current national standard "Code for Design of Electrochemical Energy Storage Power Stations" GB 51048. 6.4 Wind power generation system 6.4.1 The configuration of the wind power generation system shall comply with the provisions of the current national standard "Code for Design of Wind Power Plants" GB 51096. 6.4.2 The wind power generation system should adopt the wiring method that one wind power generating set corresponds to one box transformer booster. 6.4.3 After the wind turbines are boosted, they should be connected sequentially one by one; the collector lines in the field should be connected to the collection station according to group wiring, and the number of collector circuit loops should be determined after technical and economic comparison. 6.5 Photovoltaic power generation system 6.5.1 The photovoltaic power generation system should adopt the method of multi-level confluence, decentralized inverter, and centralized grid connection; after decentralized inverter, it should be boosted locally, and the number of collector circuit circuits after boosting should be determined after technical and economic comparison. 6.5.2 The photovoltaic power generation system should be composed of photovoltaic square arrays, combiner boxes, inverters, on-site step-up transformers, etc. The system configuration should comply with the provisions of the current national standard "Design Code for Photovoltaic Power Stations" GB 50797. 6.5.3 When the photovoltaic power generation system adopts an inverter with multi-channel MPPT function or other equipment with similar functions, the voltage, square array orientation, installation inclination angle and shading influence of the photovoltaic module strings connected to the same MPPT branch should be unanimous. 6.6 Energy storage system 6.6.1 The design and functional configuration of the energy storage system shall comply with the provisions of the current national standard "Code for Design of Electrochemical Energy Storage Power Stations" GB 51048. 6.6.2 The technical conditions of the energy storage system shall comply with the provisions of the current national standard "General technical conditions for electrochemical energy storage systems in power systems" GB/T 36558. 6.7 Calculation of power generation of combined power station 6.7.1 The on-grid power generation of wind-solar-storage combined power station shall include wind power generation, photovoltaic power generation and energy storage exchange power, and the calculation of on-grid power generation shall meet the following requirements. In the formula. Ep—on-grid electricity of wind-storage-storage combined power station (kW h); Ew——wind power generation capacity (kw h); Es——photovoltaic power generation (kW h); Eb——the energy exchanged by the energy storage device, that is, the discharge capacity of the energy storage system during the charge-discharge cycle (kW h); φ——the efficiency of the energy storage device, that is, the ratio of the discharge capacity to the charge capacity during the charge and discharge cycle of the energy storage system; Els——grid-connected power consumption of substation or switching station (kW·h). 6.7.2 The calculation of the power generation of the photovoltaic power generation system shall comply with the provisions of the current national standard "Code for Design of Photovoltaic Power Stations" GB 50797. 6.7.3 The calculation of the power generation of the wind power generation system shall comply with the provisions of the current national standard "Code for Design of Wind Power Plants" GB 51096, and the wind power plant evaluation software shall be used for simulation calculation. When calculating the power generation of a wind farm, the influence of the photovoltaic array on the roughness of the ground should be analyzed. 6.7.4 The efficiency of the energy storage device shall be calculated according to the following formula based on factors such as battery efficiency, power conversion system efficiency, power line efficiency, and transformer efficiency. In the formula. φ——battery efficiency, the efficiency of the energy storage battery to complete the charge and discharge cycle, that is, the ratio of the battery body’s discharged power to the charged power; φ——power conversion system efficiency, including rectification efficiency and inverter efficiency; φ——power line efficiency, the efficiency after considering the bidirectional transmission loss of AC and DC cables; φ——Transformer efficiency, the efficiency after considering the bidirectional transformation loss of the transformer. 6.8 Access to the system Ⅰ General Provisions 6.8.1 The main transformer of the substation of the combined power station should adopt the on-load tap changer transformer. 6.8.2 The regulating capacity of the combined power station shall comply with the provisions of the current national standard "Grid Operation Guidelines" GB/T 31464. 6.8.3 The combined power station should have the capabilities of active power control, reactive power control, frequency support, voltage control, fault ride-through, etc., and should comply with the current national standards "Technical Regulations for Connecting Wind Farms to Power Systems" GB/T 19963, "Photovoltaic Power Generation The provisions of GB/T 19964 and the "Technical Regulations for Electrochemical Energy Storage System Connected to the Power Grid" GB/T 36547. Ⅱ Grid connection requirements 6.8.4 The combined power station shall be equipped with an active power control system, which has the ability to regulate active power, and shall be able to receive and automatically execute the control instructions for active power, active power change and frequency support issued by the power system dispatching agency. 6.8.5 The combined power station shall be equipped with a reactive power and voltage control system, capable of reactive power regulation and voltage control. According to the instructions of the power system dispatching agency, the combined power station should be able to automatically adjust the reactive power emitted or absorbed, and realize the control of the grid-connected point voltage of the combined power station. 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