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JHT Series Grid Analog Power System

The JHT Series Grid Simulation Power System is a high-precision (voltage accuracy ≤±0.1%, frequency accuracy ≤0.001Hz), high-dynamics (1ms response time), and full-featured power grid simulator. It is designed for grid adaptability testing of converter equipment in energy storage, photovoltaic, and other renewable energy applications. By leveraging advanced digital control technology (supporting software programming and real-time adjustments), the system enables four-quadrant operation (bidirectional energy flow) and simulates grid characteristics ranging from ideal to "extremely harsh conditions". This system addresses critical testing needs of renewable energy converters, including grid-connected impact resistance, harmonic tolerance, and frequency ride-through capabilities.

Overview
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Product Features

1. High-Precision Simulation
It supports sine wave and harmonic superposition modes to simulate grid anomalies, including over-voltage/under-voltage, over-frequency/under-frequency, three-phase imbalance, and voltage ride-through conditions.

2. Four-Quadrant Operation
The bidirectional energy transfer capability reduces energy consumption by up to 90% and lowers operational costs.

3. Intelligent Testing
32-bit floating-point DSP technology enables fully programmable test sequences with real-time adaptive control.

4. Comprehensive Testing Functions
It supports high/low (zero) voltage ride-through, step changes, voltage sags, flicker testing, and 1ms transient response.

5. Advanced Monitoring & Data Logging
It enables real-time monitoring of critical parameters (e.g., IGBT/transformer temperatures) and 16-bit resolution data recording for predictive maintenance.

6. Versatile Communication Interfaces
It is equipped with CAN2.0A/B, RS485, Ethernet (standard) and optional RS232/GPIB interfaces for flexible integration.

Application

1. Renewable Energy Testing
Grid-connected/off-grid performance validation of inverters and PCS; MPPT analysis.

2. Electric Vehicle Testing
Charging/discharging characteristics and grid compatibility tests of electric vehicle charging stations.

3. Power Electronics R&D
Dynamic response and fault simulation for inverters and UPS systems.

4. Smart Grid Simulation
Microgrid stability analysis over grid transitions (e.g., load shifts).

Specification

Typical Device Models

Model	Rated Power (kVA)	Voltage Range (V)	Frequency (Hz)	Maximum Current/Phase (A)	Weight (kg)	Dimensions (W × D × H / mm)
JHT-063F-4Q	63	0~470	40~70	150	240	1000×1000×1500
JHT-100F-4Q	100	0~470	40~70	200	300	1000×1000×1500
JHT-150F-4Q	150	0~470	40~70	400	400	1000×1000×1900
JHT-240F-4Q	240	0~470	40~70	450	500	1140×1000×1900
JHT-320F-4Q	320	0~470	40~70	500	2400	1140×1000×1900
JHT-630F-4Q	630	0~900	40~70	900	4500	5840×1200×1900
JHT-1000F-4Q	1000	0~900	40~70	1000	6800	7840×1200×1900
System Parameters
Load-side parameters	Load Output Mode	Three-phase four-wire output; each phase can be output independently
	Voltage	Line voltage: AC0V~900V
	Frequency	40HZ~70HZ
	Resolution/Accuracy	Voltage	Resolution: 0.01V; Accuracy: 0.1% × Full Scale Value
	Resolution/Accuracy	Frequency	Resolution: 0.001Hz; Accuracy: 0.01%
	Measurement Accuracy	Voltage	Resolution: 0.01V; Accuracy: 0.1% × Full Scale Value
		Frequency	Resolution: 0.001Hz; Accuracy: 0.01%
		Current	Resolution: 0.1A / 1A; Accuracy: 0.2% × Full Scale Value
		Power	Resolution: 0.1kW / 0.01kW / 0.001kW; Accuracy: 0.3% × Full Scale Value
	Frequency Stability	≤0.01%
	Voltage Distortion	<1% (Linear Load)
	Response Time	1ms
	Three-phase Phase Difference	120°±0.3°
	Phase Voltage Crest Coefficient	1.41±0.1
	Source Effects	≤0.05%
	Loading Effect	≤0.05%
	Overload Capacity	100% < Output ≤110%: Shutdown after 600 seconds; 110% < Output ≤150%: Shutdown after 60 seconds; 150% < Output ≤200%: Shutdown after 2 seconds; Output >200%: Immediate shutdown
	Protections	Over-voltage, over-current, short circuit, IGBT/transformer overheating, phase loss, etc.
Functional Mode	How it is displayed	Background computer display
	Output Waveform	Sine wave, harmonic (superimposed 2nd~50th harmonic), interharmonic
	Transient Mode	Yes, voltage step (sag) from high voltage to low voltage or low voltage to high voltage
	Flicker Mode	Yes, any set of flicker parameters among 1~39 groups can be called
	High/Low Voltage Mode	Yes, Standard curves can be called up or adjusted individually according to user needs
	Unbalanced Mode	Yes, Three-phase voltage and three-phase phase difference can be adjusted separately; three-phase unbalance degree can be set directly
	Programming Mode	200 steps, 999999 cycles; voltage, frequency, and phase angle can be programmed for arbitrary output
	Start Ramp-up Time	0.0~99.9 seconds
	On-line Adjustment Function	In normal mode, output voltage, frequency, and waveform can be adjusted and switched online without interrupting power output
	Memory Function	Power-down memory function; can remember the last output mode and parameters
	Communication Interfaces	CAN2.0A/B, RS485, RS232 (optional), GPIB (optional), Ethernet (standard), synchronization signal (standard)
	Parallel Function	Supports 4 or more units in parallel
Environmental Needs	Operating Temperature	-10~40°C
Environmental Needs	Environmental Needs - Humidity	10~90% RH