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柴储削峰计算器

输入峰值与谷值负载，选型 BESS、PCS 与柴发备机，对比纯电网、纯柴发与柴储三方案经济性并估算回收期。

开始计算 计算器

削峰如何选型

削峰功率 = 峰值 − 谷值负载。BESS 按削峰功率与削峰时长选型，柴发备机作后备。ATS 负责电网↔柴发切换，可选 STS 服务敏感负载，DC/DC 仅用于直流耦合光储拓扑。

计算示例 — 柴储削峰

Example 1 — 500 kW Diesel-Storage Peak Shaving (4 h/day) · FOB $222,981
Diesel + storage peak shaving · 500 kW
2000 kWh BESS
500 kW PCS · 4 h/day · payback 2.3 yr
Daily saving
$260
Annual saving
$94,900
Est. BOM (FOB)
POA
📦 Bill of Materials
EquipmentModelSpecQty
Battery energy storage (BESS)2000 kWhLFP · 4 h discharge · peak shaving1
Power conversion system (PCS)500 kWbidirectional · grid-forming capable1
Diesel genset (backup)625 kVAbackup for BESS outage / extended peak · 500 kW1
ATS (grid ↔ genset)902 Aautomatic transfer · peak-shaving switching chain1
Static transfer switch (STS) · optional≤4 mssensitive-load static transfer (选配)1
Energy management system (EMS)EMSpeak-shaving dispatch · load forecast · SoC management1
Summary
Estimated total (FOB Qingdao, EXW) — priced equipmentPOA
💰 Three-option comparison (illustrative, annual)
OptionShaved energy costNotes
Pure grid$109,500/yrpay grid tariff for peak kWh (excl. demand charges)
Pure diesel$204,400/yrdiesel genset fuel at $0.28/kWh
Diesel + storage≈$138,488/yrvalley charging + BESS amortised (CRF 13%)
📐 Peak-shaving curve
BESS500 kW / 2000 kWhPCS500 kW
LEGENDBreaker (52)kWhMeter (kWh)SPD (surge protection)
📏 Standard basis
TopicStandard
Storage interconnectionGB/T 36547 — electrochemical energy storage connecting to power grid
EES systemsIEC 62933 — electrical energy storage systems
GensetISO 8528 — generating sets
🧮 How it was calculated
1. Shaving power = 1000 − 500 = 500 kW
2. BESS energy = 500 kW × 4 h = 2000 kWh
3. PCS = 500 kW · diesel backup = 625 kVA (500 kW)
4. Daily shaved energy = 500 × 4 = 2000 kWh/day
5. Spread = diesel $0.28 − grid $0.15 = $0.130/kWh → daily saving $260
6. Payback = BESS CAPEX $222,981 ÷ annual saving $94,900 = 2.3 years
📋 Design notes
Economics basis (illustrative): Savings assume the BESS charges at the grid price and discharges to displace diesel generation (or a higher peak tariff) at the 0.130 $/kWh spread. Actual payback depends on demand-charge structure, TOU tariffs and cycle life — verify with the local tariff.
Three-option comparison: Pure grid $109,500/yr vs pure diesel $204,400/yr vs diesel+storage ≈$138,488/yr for the shaved energy — storage wins where the spread is large and daily cycling is regular (illustrative, excludes demand-charge savings).
Pricing basis: BESS and PCS priced per kWh/kW from the catalogue; diesel genset and ATS from their price references. STS (sensitive loads, ≤4 ms) and EMS are optional and quoted per project (POA).
Switching chain: The ATS handles grid↔genset transfer; an optional static transfer switch (STS) provides ≤4 ms break-free transfer for sensitive loads; DC/DC converters are only needed for a DC-coupled PV-storage topology (not this AC peak-shaving case).
Design review: This is a preliminary sizing. Verify the load profile, demand-charge rules, BESS cycle life at the target DoD, and local interconnection/fire-safety codes.

计算过程说明

核心公式

削峰功率 = 峰值 − 谷值。BESS 能量 = 削峰功率 × 时长。节省 = 削峰电量 ×（柴发 − 电网）价差。回收期 = BESS CAPEX ÷ 年节省。

适用标准

GB/T 36547（储能并网）、IEC 62933（储能系统）、ISO 8528（发电机组）。

常见问题

回收期如何计算？

BESS 按电网价充电、放电替代柴发（或更高峰时电价）。回收期 = BESS CAPEX ÷ 年节省，取决于柴发−电网价差与每日循环频率。

什么是切换链路？

ATS 负责电网与柴发切换；可选静态切换开关（STS，≤4 ms）服务敏感负载；DC/DC 变换器仅用于直流耦合光储拓扑，本交流削峰场景不需要。

对比哪三种方案？

纯电网（按电网电价买峰时电量）、纯柴发（按柴发燃料成本）与柴储（谷电充电 + 年化 BESS）。价差大、循环频繁时储能占优。

设备清单中哪些有价格？

BESS 与 PCS（按 kWh/kW）、柴发与 ATS 有价。STS（可选）与 EMS 按项目报价。

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结果为工程估算，仅供参考。最终设计须由当地持证工程师根据现场条件和适用规范确认。价格为 FOB 青岛（EXW），不含运费、关税及安装费。

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