Static power generation device and related system

Abstract

The utility model discloses a static power generation device and a related system, and the static power generation device is applied to a grid-connected mode. Comprising a case, and an AC rectifier bridge circuit, a filter capacitor bank, a control circuit, an asymmetric coil capacitor bank, a compensation capacitor bank, a diode bridge and an energy storage filter capacitor bank which are arranged in the case, wherein the alternating current rectifier bridge circuit, the filter capacitor bank and the control circuit are sequentially connected from the input end of the alternating current power supply; the asymmetric coil capacitor bank and the compensation capacitor bank form a parallel circuit; the output end of the control circuit is connected to one end of the parallel circuit; the other end of the parallel circuit is connected with the input end of the diode bridge; the output end of the diode bridge is connected with the energy storage filter capacitor bank, and the energy storage filter capacitor bank outputs direct current. According to the device, under the cooperation of the asymmetric coil capacitor bank and other units, the electric energy can be reused, and the energy loss is reduced, so that the efficiency and efficiency of a power system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power generation devices, and more specifically, to a static power generation device and related systems. Background Art

[0002] The reliability of a power system includes adequacy and security. Among them, adequacy refers to that the power system has sufficient power generation capacity and sufficient power transmission capacity to meet the peak load requirements of users at any time, which characterizes the steady-state performance of the power grid.

[0003] Efficiency refers to the ratio of useful power to driving power, and the same is true for the efficiency of a power system; that is to say, the power system is not necessarily more reliable, but rather a cost-effectiveness and utilization efficiency should be considered. Excessive redundancy will cause great waste.

[0004] Whether from the power source side, the power grid side, or the user side, the efficiency of the power system in our country is relatively low. It is not that it is unreliable, but that in some aspects it is too reliable and redundancy has occurred.

[0005] With the rapid development of industrialization and urbanization, the demand for electricity has increased rapidly. However, when using electricity, power users still face the problem of low efficiency, especially for units with large electricity consumption such as factories, power stations, enterprises and institutions, and these problems are particularly obvious.

[0006] Therefore, improving the effectiveness and efficiency of the power system is an urgent problem for those skilled in the art. Content of the Utility Model

[0007] In view of this, the utility model provides a static power generation device and related systems to solve the problems of low effectiveness and efficiency in power.

[0008] To achieve the above object, the utility model adopts the following technical solutions:

[0009] In the first aspect, an embodiment of the utility model provides a static power generation device applied to a grid-connected mode. The static power generation device includes: a chassis and an AC rectifier bridge circuit, a filter capacitor bank, a control circuit, an asymmetric coil capacitor bank, a compensation capacitor bank, a diode bridge, and an energy storage filter capacitor bank arranged in the chassis;

[0010] Wherein, an AC power input end is connected to the AC rectifier bridge circuit, an output end of the AC rectifier bridge circuit is connected to an input end of the filter capacitor bank, and an output end of the filter capacitor bank is connected to an input end of the control circuit;

[0011] The asymmetric coil capacitor bank and the compensation capacitor bank form a parallel circuit;

[0012] The output terminal of the control circuit is connected to one end of the parallel circuit; the other end of the parallel circuit is connected to the input terminal of the diode bridge; the output terminal of the diode bridge is connected to the energy storage and filtering capacitor bank, and the output of the energy storage and filtering capacitor bank is direct current.

[0013] Further, the asymmetric coil capacitor group includes: a rectangular magnet and three coils X, Y, and Z wound around the periphery of the rectangular magnet; wherein, the coil X is a copper multi-strand exciting coil wound around the four sides of the upper, lower, left, and right of the rectangular magnet; the coil Y is an aluminum multi-strand exciting coil wound around the four sides of the front, back, left, and right of the rectangular magnet; the coil Z is an aluminum multi-strand exciting coil wound around the four sides of the upper, lower, front, and back of the rectangular magnet.

[0014] Further, the AC rectifier bridge circuit includes three bridge circuits composed of six thyristors;

[0015] Every two thyristors form a bridge circuit, where the anode of one thyristor is connected to the cathode of the other thyristor, and the connection point is used to connect the AC power input terminal. The cathode output of one thyristor is the output DC positive of the bridge circuit, and the anode output of the other thyristor is the output DC negative of the bridge circuit;

[0016] The output DC positives of the three bridge circuits are connected together as the output DC positive of the AC rectifier bridge;

[0017] The output DC negatives of the three bridge circuits are connected together as the output DC negative of the AC rectifier bridge.

[0018] Further, the control circuit includes: a PLC or a microprocessor, circuits Q1 and Q2;

[0019] The circuit Q1 includes a first IGBT and a first diode. The collector of the first IGBT is connected to the negative pole of the first diode to form the DC positive of Q1, the emitter of the first IGBT is connected to the positive pole of the first diode to form the DC negative of Q1, and the gate of the first IGBT is connected to the PLC or the microprocessor;

[0020] The circuit Q2 includes a second IGBT and a second diode. The collector of the second IGBT is connected to the negative pole of the second diode to form the DC positive of Q2, the emitter of the second IGBT is connected to the positive pole of the second diode to form the DC negative of Q2, and the gate of the second IGBT is connected to the PLC or the microprocessor;

[0021] The DC negative of Q1 is connected to the DC positive of Q2, and the connection point is connected to one end of the parallel circuit; the DC positive of Q1 is used as the DC positive of the control circuit, and the DC negative of Q2 is used as the DC negative of the control circuit.

[0022] Further, the diode bridge is composed of four diodes. One input end of the diode bridge is connected to two diodes in opposite directions, and the other input end of the diode bridge is connected to the other two diodes in opposite directions. Among them, the two diodes with forward circulation serve as the positive direct current output of the diode bridge, and the two diodes with reverse blocking serve as the negative direct current output of the diode bridge.

[0023] In a second aspect, an embodiment of the present invention provides a static power generation system, including: a mains distribution box, an anti-backflow device, a grid-connected inverter, an isolation transformer, and the static power generation device described in the first aspect;

[0024] Among them, the mains distribution box includes:

[0025] A main switch, which is an air switch or a reclosing device, has its input side connected to the power grid and its output side connected to the mains bus;

[0026] An isolation transformer input side air switch, with its input side connected to the mains bus and its output side connected to the isolation transformer;

[0027] A grid-connected inverter output side air switch, with its input side connected to the mains bus and its output side connected to the grid-connected inverter;

[0028] Load access side air switches, with multiple in number, each input side is respectively connected to the mains bus, and the output side is used to connect the electrical appliances at the load end;

[0029] The anti-backflow device has its input side connected to the mains bus through three current transformers, and its output side connected to the grid-connected inverter through an RS485 wiring port;

[0030] The isolation transformer has its input end connected to the isolation transformer input side air switch and its output side connected to the input side of the static power generation device;

[0031] The static power generation device has its input end connected to the output side of the isolation transformer and its output side connected to the input side of the grid-connected inverter;

[0032] The grid-connected inverter has its input end connected to the output side of the static power generation device and its output side connected to the grid-connected inverter output side air switch; its RS485 wiring port is connected to the anti-backflow device.

[0033] In a third aspect, an embodiment of the present invention provides a static power generation device, which is applied to the off-grid mode. The static power generation device includes: a chassis and a DC filtering energy storage circuit, a control circuit, an asymmetric coil capacitor bank, a compensation capacitor bank, a diode bridge, and an energy storage filtering capacitor bank arranged in the chassis;

[0034] Among them, the DC power input terminal is connected to the DC filter energy storage circuit, and the output terminal of the DC filter energy storage circuit is connected to the input terminal of the control circuit;

[0035] The asymmetric coil capacitor bank and the compensation capacitor bank form a parallel circuit;

[0036] The output terminal of the control circuit is connected to one end of the parallel circuit; the other end of the parallel circuit is connected to the input terminal of the diode bridge; the output terminal of the diode bridge is connected to the energy storage filter capacitor bank, and the output of the energy storage filter capacitor bank is direct current.

[0037] Further, the asymmetric coil capacitor bank includes: a rectangular magnet and three coils X, Y, and Z wound around the periphery of the rectangular magnet; wherein, the coil X is a copper multi-strand exciting coil wound around the upper, lower, left, and right sides of the rectangular magnet; the coil Y is an aluminum multi-strand exciting coil wound around the front, back, left, and right sides of the rectangular magnet; the coil Z is an aluminum multi-strand exciting coil wound around the upper, lower, front, and back sides of the rectangular magnet.

[0038] In a fourth aspect, an embodiment of the present invention provides a static power generation system, including: an off-grid inverter, an AC / DC high-frequency isolated DC power supply, a battery pack, and the static power generation device described in the third aspect;

[0039] The input side of the static power generation device is connected to the battery pack, and the output side is connected to the off-grid inverter;

[0040] The input side of the off-grid inverter is connected to the static power generation device, its first output side is used to connect the load electrical appliance, and its second output side is connected to the input side of the AC / DC high-frequency isolated DC power supply;

[0041] The input side of the AC / DC high-frequency isolated DC power supply is connected to the off-grid inverter, and the output side is connected to the input side of the battery pack;

[0042] The input side of the battery pack is connected to the AC / DC high-frequency isolated DC power supply, and the output side is connected to the static power generation device.

[0043] In a fifth aspect, an embodiment of the present invention provides a static power generation system for grid-connected and off-grid modes, including: a mains distribution box, an anti-backflow device, a grid-connected and off-grid inverter, a battery pack, an isolation transformer, and the static power generation device described in the first aspect;

[0044] Among them, the mains distribution box includes:

[0045] The main switch, which is an air switch or a reclosing device, has its input side connected to the power grid and its output side connected to the mains bus;

[0046] The input side of the isolation transformer is connected to the mains bus, and the output side is connected to the isolation transformer;

[0047] The output side circuit breaker of the grid-connected and off-grid inverter is connected to the mains bus on the input side and the grid-connected and off-grid inverter on the output side;

[0048] There are multiple circuit breakers on the load access side. Each input side is connected to the mains bus, and the output side is used to connect the load-side electrical appliances.

[0049] The anti-backflow device has an input side connected to the mains bus through three current transformers, and an output side connected to the grid-connected and off-grid inverter through an RS485 connection port;

[0050] The isolation transformer, the input end of which is connected to the circuit breaker on the input side of the isolation transformer, and the output side of which is connected to the input side of the static power generation device;

[0051] The static power generation device has an input end connected to the output side of the isolation transformer, and an output side connected to the input side of the grid-connected and off-grid inverter;

[0052] The grid-connected and off-grid inverter has an input end connected to the output side of the static power generation device, and an output side connected to the circuit breaker on the output side of the grid-connected inverter; its RS485 connection port is connected to the anti-backflow device; and its battery port is connected to the battery pack.

[0053] It can be seen from the above technical solutions that, compared with the prior art, the utility model has the following technical effects:

[0054] By using the asymmetric coil capacitor group to be connected in parallel and series with other units, the electric energy charged in the asymmetric coil capacitor group and the compensation capacitor group can be reused and stored in the energy storage filter capacitor group for use by the lower-level DC load, thereby reducing energy loss and improving the effectiveness and efficiency of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0056] Figure 1a This is a schematic diagram of a static power generation device in grid-connected and off-grid modes provided by the utility model.

[0057] Figure 1b This is a circuit diagram of a static power generation device in grid-connected and off-grid modes provided by the utility model.

[0058] Figure 2 Schematic diagram of the winding of the asymmetric coil provided by the present utility model.

[0059] Figure 3 Schematic diagram of the static power generation system in grid-connected mode provided by the present utility model.

[0060] Figure 4a Schematic diagram of the static power generation device in off-grid mode provided by the present utility model.

[0061] Figure 4b Circuit diagram of the static power generation device in off-grid mode provided by the present utility model.

[0062] Figure 5 Schematic diagram of the static power generation system in off-grid mode provided by the present utility model.

[0063] Figure 6 Schematic diagram of the static power generation system in grid-connected and off-grid mode provided by the present utility model. Specific embodiments

[0064] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0065] First, the terms used in the embodiments of the present utility model are explained:

[0066] Grid-connected mode means connecting to the municipal power grid and is used in power consumption places with a power grid, such as factories, power stations, enterprises and institutions, etc.

[0067] Off-grid mode means not connecting to the municipal power grid and is used in places without a power grid, such as aircraft, vehicles, ships, etc.

[0068] Grid-connected and off-grid mode has both grid-connected and off-grid modes and is used in places with underdeveloped power grids or frequent power outages, such as mountainous areas, islands, mobile facilities, etc.

[0069] Embodiment 1

[0070] An embodiment of the present utility model discloses a static power generation device, which is applied to the grid-connected mode. Refer to Figure 1a and Figure 1bAs shown in the figure, it includes: a chassis (not shown in the figure), an AC rectifier bridge circuit D1 - D6, filter capacitor banks C3, C4, a control circuit control Q1, Q2, an asymmetric coil capacitor bank C1, a compensation capacitor bank C2, a diode bridge D8 - D 11 and energy storage filter capacitor banks C5, C6.

[0071] Their connection relationship is as follows:

[0072] Refer to Figure 1a As shown in the figure, the AC power input terminal is connected to the AC rectifier bridge circuit, the output terminal of the AC rectifier bridge circuit is connected to the input terminal of the filter capacitor bank, and the output terminal of the filter capacitor bank is connected to the input terminal of the control circuit control;

[0073] The asymmetric coil capacitor bank and the compensation capacitor bank form a parallel circuit;

[0074] The output terminal of the control circuit control is connected to one end of the parallel circuit; the other end of the parallel circuit is connected to the input terminal of the diode bridge; the output terminal of the diode bridge is connected to the energy storage filter capacitor bank, and the output of the energy storage filter capacitor bank is direct current.

[0075] Among them:

[0076] Refer to Figure 1b As shown in the figure, the AC rectifier bridge circuit is three bridge circuits composed of six thyristors D1 - D6;

[0077] Every two thyristors form a bridge circuit. The anode of thyristor D1 is connected to the cathode of thyristor D2, and the connection point is used to connect the A - phase AC power supply. The anode of thyristor D3 is connected to the cathode of thyristor D4, and the connection point is used to connect the B - phase AC power supply. The anode of thyristor D5 is connected to the cathode of thyristor D6, and the connection point is used to connect the C - phase AC power supply; the cathode outputs of thyristors D1, D3, and D5 are connected together as the DC positive, and the anode outputs of thyristors D2, D4, and D6 are connected together as the DC negative.

[0078] The AC rectifier bridge circuit needs to consider the rectifier circuit and the working voltage, and is mainly realized by a bridge circuit composed of six thyristors D1 - D6 to convert alternating current into direct current. For example, D50SB100 of ASEMI can also be selected.

[0079] A free - wheeling diode D7 can be connected in parallel behind the AC rectifier bridge circuit D1 - D6 and used together with the energy storage element to prevent voltage and current mutations and provide a path. For example, a fast - recovery diode or a Schottky diode can be selected to consume the reverse electromotive force generated by the coil in the form of current.

[0080] The control circuit includes a PLC or a microprocessor, circuits Q1 and Q2, and also includes a wireless communication module connected thereto, which can be used to receive remote control signals and control the orderly operation of each component. For example, Siemens S7-200 PLC or Mitsubishi FX3U series PLC can be selected, etc. It can also be remotely controlled through a wireless Internet using a computer or a mobile phone, improving work efficiency, being convenient and fast, saving time and cost, and enhancing safety and reliability in some cases.

[0081] Circuit Q1 includes a first IGBT and a first diode. The collector of the first IGBT is connected to the negative electrode of the first diode to form the DC positive of Q1, the emitter of the first IGBT is connected to the positive electrode of the first diode to form the DC negative of Q1, and the gate of the first IGBT is connected to the PLC or the microprocessor;

[0082] Circuit Q2 includes a second IGBT and a second diode. The collector of the second IGBT is connected to the negative electrode of the second diode to form the DC positive of Q2, the emitter of the second IGBT is connected to the positive electrode of the second diode to form the DC negative of Q2, and the gate of the second IGBT is connected to the PLC or the microprocessor;

[0083] The DC positive of Q1 is used as the DC positive of the control circuit and is connected to the output DC positive of the above AC rectifier bridge. The DC negative of Q2 is used as the DC negative of the control circuit and is connected to the output DC negative of the above AC rectifier bridge. The DC negative of Q1 is connected to the DC positive of Q2, and the connection point is connected to one end of the parallel circuit.

[0084] The parallel circuit is composed of an asymmetric coil-capacitor group C1 and a compensating capacitor group C2.

[0085] Refer to Figure 2 As shown, the asymmetric coil-capacitor group C1 includes a rectangular magnet and three coils X, Y, and Z wound around the periphery of the rectangular magnet. Among them, coil X is a copper multi-strand exciting coil wound around the upper, lower, left, and right sides of the rectangular magnet; coil Y is an aluminum multi-strand exciting coil wound around the front, back, left, and right sides of the rectangular magnet; coil Z is an aluminum multi-strand exciting coil wound around the upper, lower, front, and back sides of the rectangular magnet. The X end of C1 is connected to one end of C2 as one end of the parallel circuit. The Y and Z ends of C1 are connected to one end of C2 as the other end of the parallel circuit.

[0086] The DC positive and negative outputs of the control circuit are connected in series with filter capacitor groups C3 and C4. The connection point between C3 and C4 is connected to two diodes D8 and D in opposite directions 11 , and the other end of the parallel circuit is also connected to two diodes D9 and D in opposite directions 10 , and the two diodes D8 and D that conduct in the forward direction 10 serve as the DC output positive of the static power generation device in this embodiment, and the two diodes D9 and D that block in the reverse direction11 As the DC output negative of the static power generation device in this embodiment, energy storage filter capacitor groups C5 and C6 are also connected in parallel at the end of the circuit.

[0087] Among them, the filter capacitor group makes the overall structure working performance more stable, and also reduces the interference of alternating pulsating ripples on the circuit. At the same time, the larger the filter capacitor capacity, the better the energy storage and filtering performance.

[0088] Compensation capacitor banks can not only improve the efficiency of power transmission and reduce power loss, but also reduce the load on power equipment, improve the power system power factor and extend the life of equipment.

[0089] The diode bridge is a DC rectifier bridge, which is used to adjust the direction of current. It can add the charging energy and the discharging energy twice and store them in the capacitor.

[0090] Its working principle is:

[0091] The AC bus ABCN of the mains supplies power to the static power generation device through an isolation transformer. After being connected to the AC power supply, the AC rectifier bridge rectifies to obtain adjustable DC power, which is filtered by the filter capacitor group and then enters the PLC or microprocessor control circuit to perform high-frequency charging and discharging actions on the asymmetric coil capacitor group and the compensation capacitor group. In one charging and discharging cycle, the charging and discharging electric energy is added to the discharging electric energy through the diode bridge, stored in the energy storage filter capacitor group, supplied to the inverter, and outputs AC power to the load through the inverter.

[0092] This is equivalent to the load obtaining two portions of electrical energy, while the power supply only consumes one portion of charging energy.

[0093] The static power generation device, with the cooperation of other units such as the asymmetric coil capacitor group, has the characteristics of the asymmetric coil capacitor group, which allows the accumulated charge to have flow potential energy. When the charge reaches a certain level, it is on the verge of an avalanche. At this time, there is a small agitation, which will cause an avalanche-like surge. The asymmetric coil capacitor group is connected in parallel with the compensation capacitor group and then in series with the diode bridge, so that the electric energy charged into the asymmetric coil capacitor group and the compensation capacitor group and the electric energy released are added together and stored in the energy storage filter capacitor group for use by the downstream DC load.

[0094] The static power generation device, due to its asymmetric characteristics, can add up the charging and discharging of the asymmetric coil capacitor group and the compensation capacitor group, so it can offset the power consumption of each component and enhance the overall power efficiency and effectiveness of the static power generation device.

[0095] Embodiment 2

[0096] The utility model embodiment discloses a static power generation system, referring to Figure 3As shown, it includes: a mains power distribution box, an anti-backflow device, a grid-connected inverter, an isolation transformer, and a static power generation device as described in Embodiment 1.

[0097] The connection relationship is as follows:

[0098] The mains power distribution box includes:

[0099] The main switch, which is an air switch or a reclosing device, has its input side connected to the power grid and its output side connected to the mains bus;

[0100] The input-side air switch of the isolation transformer has its input side connected to the mains bus and its output side connected to the isolation transformer;

[0101] The output-side air switch of the grid-connected inverter has its input side connected to the mains bus and its output side connected to the grid-connected inverter;

[0102] There are multiple load access-side air switches. Each input side is respectively connected to the mains bus, and the output side is used to connect electrical appliances at the load end;

[0103] The anti-backflow device has its input side connected to the mains bus through three current transformers, and its output side connected to the grid-connected inverter through an RS485 wiring port;

[0104] The isolation transformer has its input end connected to the input-side air switch of the isolation transformer and its output end connected to the input side of the static power generation device;

[0105] The static power generation device has its input end connected to the output side of the isolation transformer and its output end connected to the input side of the grid-connected inverter;

[0106] The grid-connected inverter has its input end connected to the output side of the static power generation device and its output end connected to the output-side air switch of the grid-connected inverter; its RS485 wiring port is connected to the anti-backflow device.

[0107] Its functions are as follows:

[0108] The mains power distribution box is mainly used to install air switches of corresponding power, control the on-off of the power supply, and protect electrical equipment and circuits against overload, short circuit, leakage, etc.

[0109] The anti-backflow device is connected to the mains bus through three current transformers. The current transformers are used to detect three-phase currents and transmit them to the anti-backflow device; the anti-backflow device controls the output power of the grid-connected inverter through RS485 communication; by real-time monitoring the power at the load end and adjusting the power generation power of the grid-connected inverter according to the load power in real time, it is possible to limit the excess electricity when meeting the load demand, achieving self-generation and self-use without feeding the surplus electricity back to the grid, and greatly improving the economic benefits in some industrial and commercial environments.

[0110] The core of the grid-connected inverter is the inverter switch circuit. This circuit completes the inversion function through the conduction and cutoff of power electronic switches. It has high power, low cost, high efficiency and reliability, and has a wide range of adaptation for the input voltage.

[0111] The isolation transformer safety power supply plays the roles of protection, lightning protection, filtering and interference suppression. The output end and the input end of the isolation transformer are completely "open-circuit" isolated; if there is already a transformer with isolation function in the grid-connected inverter, this isolation transformer can be omitted.

[0112] The electrical appliances at the load end can be various large or small electrical equipment, such as motors, etc.

[0113] In a factory, when the commercial power is connected to the static power generation system through the air switch or reclosing, the isolation transformer is connected to the commercial power AC bus ABCN, the output end of the isolation transformer is connected to the input end of the static power generation device, and the operation of the static power generation device can be remotely controlled through the wireless Internet or directly operated on this device. The static power generation device outputs direct current, and the positive output end and the negative output end are respectively connected to the positive and negative input ends of the DC side of the grid-connected inverter.

[0114] The AC output side of the grid-connected inverter is connected to the commercial power AC bus ABCN.

[0115] The load is composed of multiple three-phase or single-phase loads connected to the commercial power AC bus ABCN to complete the purpose of power supply and load power consumption.

[0116] Its working principle is as follows:

[0117] When the commercial power is connected to this system through the air switch or reclosing, the current signals flowing into and out of this static power generation system are detected by three current transformers A, B, and C, and are transmitted to the anti-backflow device, and are linked with the inverter through RS485 communication to control the output power of the grid-connected inverter, so as to achieve "when the current transformers detect that there is current flowing into this system (when some loads are turned on or all loads are turned on), increase the output power of the inverter, and when the current transformers detect that there is current flowing out of this system (when some loads are turned off or the loads are completely turned off), reduce the output power of the grid-connected inverter". The inverter can be remotely controlled by a computer or mobile phone through the wireless Internet, or can also be directly operated on the inverter.

[0118] The AC side of the inverter is connected to the commercial power AC bus ABCN to complete grid connection and power supply.

[0119] In a static power generation system, since the power supply access terminal of the static power generation device and the AC output terminal of the grid-connected inverter are commonly connected to the same mains AC bus ABCN through an isolation transformer, the mains power supply access terminal and the load power consumption terminal are soft-divided here with the reverse current prevention current transformer as the boundary. Inside the static power generation system, its own power supply and consumption small environment is formed. Part of the electric energy output by the inverter will be circulated and fed back to the isolation transformer through the mains AC bus ABCN, output from the isolation transformer to the static power generation device, processed by the static power generation device, and then output to the DC input side of the grid-connected inverter. The AC output side of the inverter is connected to the mains AC bus ABCN. Therefore, part of the electric energy can be reused, which can greatly improve the power efficiency and effectiveness.

[0120] Embodiment Three

[0121] An embodiment of the present utility model discloses a static power generation device, which is applied to the off-grid mode. Refer to Figure 4a - Figure 4b as shown, it includes: a chassis (not shown in the figure) and a DC filter energy storage circuit C3, C4, a control circuit control Q1, Q2, an asymmetric coil capacitor group C1, a compensation capacitor group C2, a diode bridge D8 - D 11 and an energy storage filter capacitor group C5, C6.

[0122] The connection relationship is as follows:

[0123] Refer to Figure 4a as shown, the DC power input terminal is connected to the DC filter energy storage circuit, and the output terminal of the DC filter energy storage circuit is connected to the input terminal of the control circuit control;

[0124] The asymmetric coil capacitor group and the compensation capacitor group form a parallel circuit;

[0125] The output terminal of the control circuit control is connected to one end of the parallel circuit; the other end of the parallel circuit is connected to the input terminal of the diode bridge; the output terminal of the diode bridge is connected to the energy storage filter capacitor group, and the output of the energy storage filter capacitor group is direct current.

[0126] Among them,

[0127] Refer to Figure 4b as shown, the DC power input terminal is connected to the DC filter energy storage circuit C3, C4, and a freewheeling diode D7 and a control circuit also need to be connected in parallel; among them, the control circuit includes a PLC or a microprocessor, circuits Q1 and Q2;

[0128] Circuit Q1 includes a first IGBT and a first diode. The collector of the first IGBT is connected to the negative electrode of the first diode to form the DC positive of Q1, the emitter of the first IGBT is connected to the positive electrode of the first diode to form the DC negative of Q1, and the gate of the first IGBT is connected to the PLC or the microprocessor;

[0129] The circuit Q2 includes a second IGBT and a second diode. The collector of the second IGBT is connected to the negative pole of the second diode to form the DC positive of Q2, the emitter of the second IGBT is connected to the positive pole of the second diode to form the DC negative of Q2, and the gate of the second IGBT is connected to the PLC or microprocessor;

[0130] The DC positive of Q1 is used as the DC positive of the control circuit and is connected to the DC positive of the above DC power input terminal. The DC negative of Q2 is used as the DC negative of the control circuit and is connected to the DC negative of the above DC power input terminal; The DC negative of Q1 is connected to the DC positive of Q2, and the connection point is connected to one end of the parallel circuit.

[0131] The parallel circuit is composed of an asymmetric coil-capacitor group C1 and a compensation capacitor group C2.

[0132] The asymmetric coil-capacitor group C1 includes a magnet and three coils X, Y, and Z wound around the periphery of the magnet; One end of C1, the X end, is connected to one end of C2 as one end of the parallel circuit; The Y and Z ends of C1 are connected to one end of C2 as the other end of the parallel circuit;

[0133] The DC positive and negative outputs of the control circuit are connected to the filter capacitor groups C3 and C4. The connection point between C3 and C4 is connected to two diodes D8 and D in opposite directions 11 , and the other end of the parallel circuit is also connected to two diodes D9 and D in opposite directions 10 , and the two diodes D8 and D that conduct in the forward direction 10 serve as the DC output positive of the static power generation device in this embodiment, and the two diodes D9 and D that block in the reverse direction 11 serve as the DC output negative of the static power generation device in this embodiment; At the end of the circuit, an energy storage filter capacitor group C5 and C6 are also connected in parallel.

[0134] Its working principle is illustrated by the following embodiments:

[0135] When there is no power grid on the ship and only a DC power supply can be provided, the DC power supply is connected to the DC filter energy storage circuit through the power input terminal, and then enters the asymmetric coil-capacitor group and the compensation capacitor group controlled by the control circuit for charging and discharging actions. The charging electric energy and the discharging electric energy are added together twice through the diode rectifier bridge and stored in the energy storage filter capacitor group, which is supplied to the inverter to output AC power, and the AC power is output to the load through the inverter.

[0136] The control circuit is a PLC or a microprocessor, which may also include a wireless communication module connected thereto, which can be used to receive remote control signals and control the orderly operation of various components. For example, Siemens S7-200PLC or Mitsubishi FX3U series PLC may be selected. It may also be remotely controlled by a computer or mobile phone via wireless Internet, thereby improving work efficiency, convenience, speed, time saving and cost saving, and in some cases enhancing safety and reliability.

[0137] The asymmetric coil capacitor group includes: a magnet; three coils X, Y, and Z; among which, the three coils X, Y, and Z are made of copper multi-strand excitation wire; Y and Z are made of aluminum multi-strand excitation wire; the winding diagram of the coils is shown in Figure 2 As shown; its asymmetric usage area and asymmetric material can improve the charging and discharging performance of the device and enhance power efficiency.

[0138] With the cooperation of the asymmetric coil capacitor group and other units, the characteristics of the asymmetric coil capacitor group allow the accumulated charge to have flow potential energy. When the charge reaches a certain level, it is on the edge of an avalanche. At this time, there is a small turbulence, which will cause an avalanche-like surge. The asymmetric coil capacitor group is connected in parallel with the compensation capacitor group and then in series with the diode bridge, so that the electric energy charged into the asymmetric coil capacitor group and the compensation capacitor group and the electric energy released are added together and stored in the energy storage filter capacitor group for use by the lower-level DC load; energy loss is reduced, thereby improving the effectiveness and efficiency of the power system.

[0139] Embodiment 4

[0140] The utility model embodiment discloses a static power generation system, referring to Figure 5 As shown, it includes: an off-grid inverter, an AC / DC high-frequency isolated direct current power supply, a battery pack and a static power generation device as described in Example 3.

[0141] The off-grid mode of the static power generation system is characterized by small size, light weight, high power and high efficiency.

[0142] The connection relationship is:

[0143] Static power generation device, the input side is connected to the battery pack, and the output side is connected to the off-grid inverter;

[0144] An off-grid inverter, the input side of which is connected to a static power generation device, the first output side of which is used to connect to a load-end electrical appliance, and the second output side of which is connected to the input side of an AC / DC high-frequency isolated DC power supply;

[0145] AC / DC high-frequency isolated DC power supply, the input side is connected to the off-grid inverter, and the output side is connected to the input side of the battery pack;

[0146] The battery pack has an input side connected to an AC / DC high-frequency isolated DC power supply, and an output side connected to a static power generation device.

[0147] Its working principle is:

[0148] There is no power grid on the ship, so the off-grid mode is used. When the machine is turned on, the power of the battery pack enters the DC filter energy storage circuit, and the asymmetric coil capacitor group and the compensation capacitor group are charged and discharged at a high frequency through the PLC or microcomputer control circuit and drive circuit. In one charge and discharge cycle, the charging energy and the discharging energy are added together through the diode bridge and stored in the energy storage filter capacitor group, which is then supplied to the 50 / 60Hz voltage-stabilizing inverter to be inverted into suitable power, which is then output to the load by the inverter.

[0149] This is equivalent to the load obtaining two portions of electrical energy, while the power supply only consumes one portion of charging energy.

[0150] The battery pack includes a power indicator light and a battery indicator light, and has a built-in battery management system, which makes it easy to observe the battery pack power status, prevent the battery pack from overcharging and over-discharging, improve the utilization rate of the battery pack, extend the service life of the battery pack, and monitor the status of the battery pack.

[0151] The inverter output end is connected to an AC / DC high-frequency isolated DC power supply, and the power supply outputs DC power to supplement and charge the battery pack.

[0152] With the cooperation of other units such as the asymmetric coil capacitor group, the characteristics of the asymmetric coil capacitor group allow the accumulated charge to have flow potential energy. When the charge reaches a certain level, it is on the edge of an avalanche. At this time, there is a small agitation, and an avalanche-like surge will erupt. The asymmetric coil capacitor group is connected in parallel with the compensation capacitor group and then in series with the diode bridge, so that the electric energy charged into the asymmetric coil capacitor group and the compensation capacitor group and the electric energy released are added together and stored in the energy storage filter capacitor group for use by the downstream DC load.

[0153] The off-grid mode of the static power generation system, due to its asymmetric characteristics, can add up the charging and discharging energy of the asymmetric coil capacitor group and the compensation capacitor group, and form a cycle through the AC / DC isolated DC power supply. Part of the energy is reused, so it can offset the energy consumption of each component and enhance the overall power (electric energy) efficiency and effectiveness of the off-grid mode of the static power generation system.

[0154] Embodiment 5

[0155] The utility model embodiment discloses a static power generation system, which is applied to the on-grid and off-grid mode. Figure 6 As shown, it includes: a mains power distribution box, a backflow prevention device, a grid-connected and off-grid inverter, a battery pack, an isolation transformer and a static power generation device as described in the first embodiment.

[0156] The connection relationship and working principle are described by the following embodiments:

[0157] On the island, when the power system is stable, the mains power can be used. When the power grid is cut off for maintenance due to the influence of wind and waves or tsunamis, there is no power grid, and an off-grid and grid-connected mode static power generation system is required.

[0158] When the mains power is connected to the static power generation system through an automatic reclosing switch, the automatic reclosing switch controls the on-grid and off-grid working states of the system. The isolation transformer is connected to the mains AC bus ABCN, and the output end of the isolation transformer is connected to the input end of the static power generation device. The operation of the static power generation device can be remotely controlled by a mobile phone or directly operated on the device. The static power generation device outputs direct current, and the positive output end and the negative output end are respectively connected to the positive and negative input ends of the DC side of the off-grid and grid-connected inverter. The battery pack is connected to the battery connection end of the off-grid and grid-connected inverter, and the AC output side of the off-grid and grid-connected inverter is connected to the mains AC bus ABCN.

[0159] The load is composed of multiple three-phase or single-phase loads connected to the mains AC bus ABCN to achieve the purpose of power supply and load power consumption.

[0160] When the mains power is connected to the system through an automatic reclosing switch, the current signals flowing into the load are detected by three current transformers A, B, and C and transmitted to the anti-counterflow device. The anti-counterflow device is linked to the inverter through RS485 communication to control the output power of the off-grid and grid-connected inverter, so as to achieve "when the current transformers detect that there is current flowing into the load (when some loads are turned on or all loads are turned on), increase the output power of the inverter. According to the magnitude of the current detected by the current transformers (when some loads are turned off or all loads are turned off), control the output power of the off-grid and grid-connected inverter". The inverter can be remotely controlled by a computer through the wireless Internet or a mobile phone, or directly operated on the inverter.

[0161] The AC side of the inverter is connected to the mains AC bus ABCN to complete grid connection and power supply.

[0162] When the power grid is cut off for maintenance due to the influence of wind and waves or tsunamis, there is no mains power access. At this time, the battery pack is required to supply power. The battery pack outputs direct current to supply the off-grid and grid-connected inverter. The off-grid and grid-connected inverter is connected to the mains bus, on the one hand, for load power consumption, and on the other hand, to supply power to the static power generation device through the isolation transformer. The static power generation device outputs direct current to the off-grid and grid-connected inverter to achieve a cycle. When there is an excess of electricity, the battery management system of the battery pack stores the excess electricity in the battery.

[0163] The battery pack includes a power display lamp and a power level indicator to monitor the status of the battery pack. It also has a built-in battery management system, which is convenient for observing the power level of the battery pack, preventing overcharging and over-discharging of the battery pack, improving the utilization rate of the battery pack, and extending the service life of the battery pack.

[0164] In a static power generation system, since the power supply access terminal of the static power generation device and the AC output terminal of the grid-connected inverter are commonly connected to the same mains AC bus ABCN, part of the electric energy output by the inverter will be circulated and fed back to the isolation transformer through the mains AC bus ABCN. The isolation transformer outputs to the static power generation device, and after being processed by the static power generation device, it is output to the DC input side of the grid-connected inverter. The AC output side of the inverter is connected to the mains AC bus ABCN. Therefore, part of the electric energy can be reused, which can greatly improve the power efficiency.

[0165] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part.

[0166] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A static power generation device, characterized in that, Applied to the grid-connected mode, the static power generation device includes: a chassis and an AC rectifier bridge circuit, a filter capacitor bank, a control circuit, an asymmetric coil capacitor bank, a compensation capacitor bank, a diode bridge, and an energy storage filter capacitor bank arranged in the chassis; Among them, the AC power input terminal is connected to the AC rectifier bridge circuit, the output terminal of the AC rectifier bridge circuit is connected to the input terminal of the filter capacitor bank, and the output terminal of the filter capacitor bank is connected to the input terminal of the control circuit; The asymmetric coil capacitor bank and the compensation capacitor bank form a parallel circuit; The output terminal of the control circuit is connected to one end of the parallel circuit; the other end of the parallel circuit is connected to the input terminal of the diode bridge; the output terminal of the diode bridge is connected to the energy storage filter capacitor bank, and the output of the energy storage filter capacitor bank is direct current.

2. The static power generation device according to claim 1, characterized in that, The asymmetric coil capacitor bank includes: a rectangular magnet and three coils X, Y, and Z wound around the periphery of the rectangular magnet; among them, the coil X is a copper multi-strand exciting coil wound around the upper, lower, left, and right sides of the rectangular magnet; the coil Y is an aluminum multi-strand exciting coil wound around the front, back, left, and right sides of the rectangular magnet; the coil Z is an aluminum multi-strand exciting coil wound around the upper, lower, front, and back sides of the rectangular magnet.

3. A static power generation device according to claim 1, characterized in that, The AC rectifier bridge circuit includes three bridge circuits composed of six thyristors; Every two thyristors form a bridge circuit, where the anode of one thyristor is connected to the cathode of another thyristor, and the connection point is used to connect the AC power input terminal. The cathode output of one thyristor is the output DC positive of the bridge circuit, and the anode output of the other thyristor is the output DC negative of the bridge circuit; The output DC positives of the three bridge circuits are connected together as the output DC positive of the AC rectifier bridge; The output DC negatives of the three bridge circuits are connected together as the output DC negative of the AC rectifier bridge.

4. A static power generation device according to claim 1, characterized in that, The control circuit includes: a PLC or a microprocessor, circuits Q1 and Q2; The circuit Q1 includes a first IGBT and a first diode. The collector of the first IGBT is connected to the negative electrode of the first diode to form the DC positive of Q1, the emitter of the first IGBT is connected to the positive electrode of the first diode to form the DC negative of Q1, and the gate of the first IGBT is connected to the PLC or the microprocessor; The circuit Q2 includes a second IGBT and a second diode. The collector of the second IGBT is connected to the negative electrode of the second diode to form the DC positive of Q2, the emitter of the second IGBT is connected to the positive electrode of the second diode to form the DC negative of Q2, and the gate of the second IGBT is connected to the PLC or the microprocessor; The DC negative of Q1 is connected to the DC positive of Q2, and the connection point is connected to one end of the parallel circuit; the DC positive of Q1 is used as the DC positive of the control circuit, and the DC negative of Q2 is used as the DC negative of the control circuit.

5. A static power generation device according to claim 1, characterized in that, The diode bridge is composed of four diodes. One end of the input of the diode bridge is connected to two diodes in opposite directions, and the other end of the input of the diode bridge is connected to the other two diodes in opposite directions. Among them, the two diodes with forward current flow serve as the positive direct current output of the diode bridge, and the two diodes with reverse blocking serve as the negative direct current output of the diode bridge.

6. A static power generation system, characterized in that, Including: a mains distribution box, an anti-backflow device, a grid-connected inverter, an isolation transformer, and the static power generation device according to any one of claims 1-5; Among them, the mains distribution box includes: a main switch, which is an air switch or a reclosing device. The input side is connected to the power grid, and the output side is connected to the mains bus; an isolation transformer input-side air switch, the input side is connected to the mains bus, and the output side is connected to the isolation transformer; a grid-connected inverter output-side air switch, the input side is connected to the mains bus, and the output side is connected to the grid-connected inverter; a load access-side air switch, and the number is multiple. Each input side is respectively connected to the mains bus, and the output side is used to connect the electrical appliances at the load end; the anti-backflow device, the input side is connected to the mains bus through three current transformers, and the output side is connected to the grid-connected inverter through an RS485 wiring port; the isolation transformer, the input end is connected to the isolation transformer input-side air switch, and the output side is connected to the input side of the static power generation device; the static power generation device, the input end is connected to the output side of the isolation transformer, and the output side is connected to the input side of the grid-connected inverter; the grid-connected inverter, the input end is connected to the output side of the static power generation device, and the output side is connected to the grid-connected inverter output-side air switch; its RS485 wiring port is connected to the anti-backflow device.

7. A static power generation device, characterized in that, Applied to the off-grid mode, the static power generation device includes: a chassis and a DC filtering energy storage circuit, a control circuit, an asymmetric coil capacitor bank, a compensation capacitor bank, a diode bridge, and an energy storage filtering capacitor bank arranged in the chassis; Among them, the DC power input end is connected to the DC filtering energy storage circuit, and the output end of the DC filtering energy storage circuit is connected to the input end of the control circuit; The asymmetric coil capacitor bank and the compensation capacitor bank form a parallel circuit; The output end of the control circuit is connected to one end of the parallel circuit; the other end of the parallel circuit is connected to the input end of the diode bridge; the output end of the diode bridge is connected to the energy storage filtering capacitor bank, and the output of the energy storage filtering capacitor bank is direct current.

8. A static power generation device according to claim 7, characterized in that, The asymmetric coil capacitor bank includes: a rectangular magnet and three coils X, Y, and Z wound around the periphery of the rectangular magnet; among them, the coil X is a copper multi-strand exciting coil wound around the upper, lower, left, and right four sides of the rectangular magnet; the coil Y is an aluminum multi-strand exciting coil wound around the front, back, left, and right four sides of the rectangular magnet; the coil Z is an aluminum multi-strand exciting coil wound around the upper, lower, front, and back four sides of the rectangular magnet.

9. A static power generation system, characterized in that, Including: an off-grid inverter, an AC / DC high-frequency isolation DC power supply, a battery pack, and the static power generation device according to any one of claims 7-8; The static power generation device, the input side is connected to the battery pack, and the output side is connected to the off-grid inverter; The off-grid inverter has its input side connected to the static power generation device, its first output side for connecting the electrical appliances at the load end, and its second output side connected to the input side of the AC / DC high-frequency isolated DC power supply; The AC / DC high-frequency isolated DC power supply has its input side connected to the off-grid inverter and its output side connected to the input side of the battery pack; The battery pack has its input side connected to the AC / DC high-frequency isolated DC power supply and its output side connected to the static power generation device.

10. A static power generation system, characterized in that, Applied to the grid-connected and off-grid mode, it includes: a mains distribution box, an anti-backflow device, a grid-connected and off-grid inverter, a battery pack, an isolation transformer, and the static power generation device according to any one of claims 1-2; Among them, the mains distribution box includes: The main switch, which is an air switch or a reclosing device, has its input side connected to the power grid and its output side connected to the mains bus; The isolation transformer input side air switch has its input side connected to the mains bus and its output side connected to the isolation transformer; The grid-connected and off-grid inverter output side air switch has its input side connected to the mains bus and its output side connected to the grid-connected and off-grid inverter; The load access side air switches, with multiple in number, each input side is respectively connected to the mains bus, and the output side is for connecting the electrical appliances at the load end; The anti-backflow device has its input side connected to the mains bus through three current transformers, and its output side connected to the grid-connected and off-grid inverter through the RS485 wiring port; The isolation transformer has its input end connected to the isolation transformer input side air switch and its output end connected to the input side of the static power generation device; The static power generation device has its input end connected to the output side of the isolation transformer and its output end connected to the input side of the grid-connected and off-grid inverter; The grid-connected and off-grid inverter has its input end connected to the output side of the static power generation device, its output end connected to the grid-connected and off-grid inverter output side air switch; its RS485 wiring port is connected to the anti-backflow device; its battery port is connected to the battery pack.

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