Body. AC load box Programmable load box Load box
Body. Preface Regarding the anti-islanding test of grid-connected photovoltaic inverters, although some manufacturers' loads are technically mature, they are very expensive. At present, most inverter manufacturers spend a lot of money on R&D of products in the early stage, and most of them have not yet been mass-produced and are not profitable. Therefore, whether to use high-cost island test equipment is still controversial in the industry (Beijing Jianheng) This issue is also mentioned in the standard). In response to this environment, and also in response to the requirements of most inverter manufacturers, our company independently develops low-cost equipment that can meet the basic testing requirements of the anti-islanding test, creating more benefits for manufacturers.
Body. 1. Prominent application of anti-islanding test load box
Body., simulates the resonance occurrence of AC power equipment, and effectively and accurately detects the anti-islanding effect protection function of the grid-connected inverter.
Body., detect the working efficiency, full load operating output power and load capacity of various inverters.
It can simulate various complex working environments and detect the comprehensive working performance of the inverter in various environments.
It is applied to the product acceptance and daily maintenance inspection of grid-connected inverters by the user unit, to comprehensively and scientifically test the power supply capabilities of various inverters, and to provide accurate test reports.
Body., used in grid-connected inverter factory inspection, type testing, production debugging, scientific research and development, laboratory electrical testing, authoritative organization identification and testing and other fields.
Body. 2. The main functions of the anti-islanding test load box
Body. The three-phase inductive current and the three-phase capacitive current values are directly and independently displayed on the control panel, and the resonance point symptoms are directly displayed on the panel. The resistive, inductive and capacitive parts can all have minimum step amplitude. Advantages At present, the minimum step of similar domestic manufacturers is 0. Our company is designed to accurately adjust the resistance, sensitivity and capacitance to different resonance points according to the minimum step. The gear accuracy is high to achieve truly high-precision testing, and can be used at different Compensation for different powers is achieved within the power range.
The accuracy test results of the resistive and capacitive network load accuracy test are within % of the factory standard.
Body. Resonance test settings include inductive power consumption and capacitive power consumption. In theory, during resonance, the inductive and capacitive reactive powers cancel each other out, resulting in reactive power.
Body. The power of three-phase resistive load, inductive load and capacitive load can be independently controlled and adjusted by phase to accurately adjust the AC resonance point under the condition of unbalanced three-phase voltage.
The load box can be based on the performance parameter testing requirements, and the discharge power can be combined and set at will through the operation panel.
The body adopts new power consumption components with high power density and no red hot phenomenon. The whole machine is composed of three parts: resistive load, inductive load and capacitive load.
Body. Power input adopts segmented switch control. The load works in an energy-consuming manner, and forced air cooling is used for heat dissipation.
Body. AC load box programmable load box load box
Body. 3. Technical parameters of anti-islanding test load box
Body. Host consists of resistive load, inductive load and capacitive load. Partially composed. Power factor.～adjustable.
Body. The three-part load load is continuously adjustable by three-phase independent control switches.
The resistive, perceptual and capacitive parts of the body can be freely combined.
The body and load cooling method is forced air cooling.
Body. Main specifications of anti-islanding experimental load box
Body. Test voltage
Body. Single-phase or three-phase
Body. Frequency
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Body.Rated power
Body.Resistive
Body.Load power
Body.Inductive
Body.Load power
Body.Capacitive
Body.Load Power
Body. Adjustment step
Body. Model
Body. Dimensions
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Body. AC load box Programmable load box Load box
Body. Special specifications, can be customized according to customer requirements
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Body. Working power supply
Body. Single-phase or three-phase
Body. Control mode
Body. Manual control, Three-phase independent split-phase control
Body. Cooling system
Body. Forced air cooling
Body. 4. Island protection experiment
Body. AC load box programmable load box load box< br/> Body. 5. The reference technical standards for the production of anti-islanding test load boxes are
Body./"The following technical requirements and test methods for special inverters for low-voltage grid-connected photovoltaic power generation"
Body."And Technical requirements and test methods for special inverters for grid-connected photovoltaic power generation"
Body./"Technical requirements for grid-connected photovoltaic systems",
Body "Inverters, converters and controllers for independent power systems",
Body. "Grid connection of power systems connected through inverters Part 2 Inverter Requirements",
Body "Standards for interconnection of distributed power sources and power systems",
Body. "Test procedures for interface equipment between distributed power sources and power systems",
Body. "Anti-islanding test method for inverters used in photovoltaic grid-connected systems"
Body. AC load box programmable load box Load box
250kwRLC AC load box 250kwRLC programmable load box