System and method for parallel configuration of hybrid energy storage module

Patent metadata

Field	Value
Publication number	US-2016336928-A1
Application number	US-201514711632-A
Country	US
Kind code	A1
Filing date	May 13, 2015
Priority date	May 13, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

A hybrid energy storage system is configured to control pulsed power. A first dynamo-electric machine is coupled to an inertial energy storage device and has multiple input stator windings configured to accept input power from a source. A polyphase output stator winding is configured to deliver electric power having a first response time to a DC bus. A secondary energy storage system is coupled to the DC bus and is configured to convert its stored energy to electric power in a bidirectional manner. A second dynamo-electric machine has an input stator winding and at least one polyphase output stator winding coupled to a converter, the converter coupled to a DC output. A polyphase boost exciter is configured to derive energy from the DC bus and excite the second machine tertiary stator winding, wherein the second machine is configured to be excited at a faster rate than the first response time of the first machine.

First claim

What is claimed is:

1 . A system, comprising:
an inertial and electro-chemical combined energy storage system; a first dynamo-electric machine configured to act as a prime mover and electrically coupled to a second dynamo-electric machine through an electrical reactor, the first dynamo-electric machine having output stator windings configured to produce alternating current (AC) power, a rotor winding configured to be excited by an exciter, and having at least one polyphase output stator winding with rectification to deliver electric power at a first rate to a bus; a secondary energy storage system coupled to the bus and configured to exchange electrical energy in a bidirectional manner; a second dynamo-electric machine coupled to the inertial energy storage device and a third-dynamo electrical machine, the third-dynamo electrical machine coupled to the inertial energy storage device and configured to impart kinetic energy to and extract kinetic energy from the inertial storage device, the second dynamo-electric machine having a multi-port stator winding and a wound-rotor with a polyphase winding for excitation, and at least one polyphase output stator winding coupled to an AC/direct current (DC) power converter, the power converter coupled to a DC output configured to couple to a pulsed load device; and a polyphase boost exciter configured to derive energy from either an AC bus or a DC bus and excite the second dynamo-electric machine tertiary stator winding, wherein the second dynamo-electric machine is configured to be electronically excited at a second rate that is faster than the first rate for the purpose of feeding loads with fast rise times or having rapidly changing terminal impedances.

2 . The system as specified in claim 1 , wherein the secondary energy storage system comprises an electro-chemical battery.

3 . The system according to claim 1 , wherein the at least one polyphase output stator winding of the second dynamo-electric machine is configured to deliver fast pulses of electric energy to the load at a plurality of power, duty-cycle and voltage levels.

4 . The system according to claim 1 , wherein the system is configured to bi-directionally transfer energy between the DC output, the secondary energy storage system, the inertial energy storage system, and the AC source

5 . The system according to claim 1 , further comprising an electrical reactor positioned in between first and second dynamo-electric machines for the purpose of segregating the first dynamo-electric machine from fast rising pulses or oscillating power profiles operating at the second electrical machine whilst feeding pulsed power loads.

6 . The system according to claim 5 , further comprising an electrical polyphase saturable rectifier that is controllable by a level of applied DC bias to each magnetic core, the level responsive to at least one of: a load current, output pulse current or output power.

7 . The system according to claim 5 , wherein the second dynamo-electric machine has a plurality of electrical excitation schemes providing both slowly rising and fast rising output power according to the load demand, the second dynamo-electric machine having a combination of low-impedance and high impedance polyphase windings producing low-voltage and high voltage output respectively.

8 . The system according to claim 7 , wherein the second dynamo-electric machine has a lower transient and sub-transient electrical reactance than the first dynamo-electric machine or composite group of first dynamo-electric machines thereby diverting the majority of pulsed or transient load current away from the first dynamo-electric machine and reducing the impact of pulse loading on the main power source.

9 . The system according to claim 8 , wherein the combination of a second-dynamo electric machine and third dynamo-electric machine form a network of low electrical impedance to transmit and recover fast rising electrical energy and of substantially lower impedance as compared to the main generation network or the bus.

10 . The system according to claim 8 , wherein the combination of a second dynamo-electric machine, a third dynamo-electric machine and inertial storage unit form a network with a natural mechanical frequency less than the system electrical operating frequency and avoid electro-mechanical resonances whilst operating pulsed power loads.

11 . The system according to claim 10 , wherein the second dynamo-electric machine includes one polyphase AC winding connected to the main generation network or the bus, through the electrical reactor and a plurality of polyphase AC windings connected to a plurality of loads comprising both steady-state loads and pulsed loads.

12 . The system according to claim 11 , wherein the second dynamo-electric machine is configured to transfer incoming AC polyphase power from the main generating network of one stator winding across a machine airgap, magnetize the polyphase rotor winding and transfer power to a converter system connected to a battery energy storage system.

13 . The system according to claim 12 , wherein the converter system connected to rotor windings is a bi-directional converter that allows for battery charging power flow and for the battery providing excitation power to the second dynamo electric machine, the power flow comprising a combination of power from the first-dynamo electric machine and inertial energy imparted to a rotor of the third-dynamo electric machine.

14 . The system according to claim 1 , further comprising a control system, the control system comprising:
an outer speed energy controller loop; an inner current regulating loop; and an innermost voltage controller configured to direct gating pulses to a power electronic motor drive for regulation of overall system energy.

15 . The system according to claim 1 , further comprising an excitation controller configured to control synchronous and asynchronous mode of operation of a wound-rotor dynamo electric machine.

16 . The system according to claim 1 , further comprising:
a parallel multi-loop control scheme of an outer loop voltage controller and outer loop current controller; a switch configured two switch between the outer loop voltage controller and the outer loop current controller; and an inner voltage controller configured to control power electronic switching devices used for battery source regulation to a load.

17 . The system according to claim 1 , wherein the second-dynamo electrical machine is connected to a zig-zag phase-shift transformer configured to increase a number of output phases to provide a high pulse number for rectification to a DC output bus.

18 . The system according to claim 1 , further comprising a plurality of energy storage sets configured to operate in unison to feed a common load, wherein the multi-port dynamo electric machines are maintained in synchronization by common frequency connection on at least one stator port including a controller configured to coordinate rotor excitation variable frequency drives in unison.

19 . The system according to claim 1 , further comprising:
a regenerative motor drive; a DC power filter; and a dynamic braking resistor configured to allow bidirectional power to and from the secondary energy storage system.

20 . The system according to claim 1 , further comprising a three-level DC to AC power converter with outputs coupled to a step-up transformer and a series connection of secondary wye-delta windings configured to produce h

Assignees

• Raytheon Co

Inventors

• Kuznetsov Stephen B

Classifications

• H02J2105/31

  for ships or vessels · CPC title

• H03K5/00

  Manipulating of pulses not covered by one of the other main groups of this subclass (circuits with regenerative action H03K3/00, H03K4/00; by the use of non-linear magnetic or dielectric devices H03K3/45) · CPC title

• H02J3/30

  using dynamo-electric machines coupled to flywheels · CPC title

• H03K3/53 Primary

  by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback (H03K3/335 takes precedence) · CPC title

• Y02E60/16

  Mechanical energy storage, e.g. flywheels or pressurised fluids · CPC title