Unified energy control system
An energy control and controller technology, applied in AC networks to reduce harmonics/ripples, reactive power adjustment/elimination/compensation, multiphase network elimination/reduction of asymmetry, etc. The grid voltage rises, there is no large-capacity energy storage device, etc., to achieve the effect of improving safety and stability, suppressing high-order harmonic resonance, and good industrial application prospects
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Embodiment 1
[0042] Example 1, such as figure 1 As shown, a unified energy control system according to an embodiment of the present invention includes:
[0043] The single-phase multi-winding isolation transformer is connected to the power supply arm of the traction transformer and performs isolation and step-down. The high-voltage sides of the two single-phase multi-winding isolation transformers T1 and T2 are respectively connected to the two power supply arms of the traction transformer through connection switches QF1 and QF2, and the low-voltage sides of T1 and T2 include at least one low-voltage winding.
[0044] The energy storage and converter is used to store the braking energy of the traction locomotive in real time, and control the release of the stored energy, realize the two-way flow of active power of the two power supply arms, and compensate the reactive power of the two power supply arms. The energy storage and converter includes two energy storage and conversion sub-module...
Embodiment 2
[0051] Example 2, such as figure 2 As shown, the present invention also provides a comprehensive optimization control method of a unified energy control system, the method comprising the following steps:
[0052] Step 1. At the beginning of each sampling period, measure the three-phase voltage u of the circuit on the grid side of the traction transformer ABC , three-phase current i ABC and the two-phase feeder voltage u on the traction side of the traction transformer 1 , u 2 and two-phase feeder current i s1 i s2 Carry out sampling respectively, and input the sampling data into the state monitoring module;
[0053] Step 2, the three-phase voltage unbalance given value ε * u , Power factor given value PF * and two-phase feeder voltage given value U * 1,2 The input state monitoring module adopts the fast Fourier algorithm and the instantaneous power algorithm to obtain the real-time data and operation status of the traction transformer grid side and the traction tran...
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Abstract
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Application Information
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